dnl Tcl M4 Routines

dnl Find a runnable Tcl
AC_DEFUN([TCLEXT_FIND_TCLSH_PROG], [
	AC_CACHE_CHECK([runnable tclsh], [tcl_cv_tclsh_native_path], [
	AC_CACHE_CHECK([for runnable tclsh], [tcl_cv_tclsh_native_path], [
		dnl Try to find a runnable tclsh
		if test -z "$TCLCONFIGPATH"; then
			TCLCONFIGPATH=/dev/null/null
		fi

		for try_tclsh in "$TCLSH_NATIVE" "$TCLCONFIGPATH/../bin/tclsh" \
		                 "$TCLCONFIGPATH/../bin/tclsh8.6" \

			AC_MSG_ERROR([cant build without tcl])
		fi

		TCLCONFIGPATH="$withval"
	], [
		if test "$cross_compiling" = 'no'; then
			TCLEXT_FIND_TCLSH_PROG
			tclConfigCheckDir="`echo 'puts [[tcl::pkgconfig get libdir,runtime]]' | "$TCLSH_PROG" 2>/dev/null`"
			tclConfigCheckDir0="`echo 'puts [[tcl::pkgconfig get libdir,runtime]]' | "$TCLSH_PROG" 2>/dev/null`"
			tclConfigCheckDir1="`echo 'puts [[tcl::pkgconfig get scriptdir,runtime]]' | "$TCLSH_PROG" 2>/dev/null`"
		else
			tclConfigCheckDir=/dev/null/null
			tclConfigCheckDir0=/dev/null/null
			tclConfigCheckDir1=/dev/null/null
		fi

		if test "$cross_compiling" = 'no'; then
			dirs="/usr/$host_alias/lib /usr/lib /usr/lib64 /usr/local/lib /usr/local/lib64"
		else
			dirs=''
		fi

		for dir in "$tclConfigCheckDir" $dirs; do
		for dir in "$tclConfigCheckDir0" "$tclConfigCheckDir1" $dirs; do
			if test -f "$dir/tclConfig.sh"; then
				TCLCONFIGPATH="$dir"

				break
			fi
		done
	])

	CPPFLAGS="${SAVE_CPPFLAGS} ${TCLTLS_SSL_CPPFLAGS}"

	dnl Verify that basic functionality is there
	AC_LANG_PUSH(C)
	AC_MSG_CHECKING([if a basic OpenSSL program works])
	AC_LINK_IFELSE([AC_LANG_PROGRAM([
#include <openssl/ssl.h>
#include <openssl/opensslv.h>
#if (SSLEAY_VERSION_NUMBER >= 0x0907000L)
# include <openssl/conf.h>
#endif
		], [
  (void)SSL_library_init();
  SSL_library_init();
  SSL_load_error_strings();
  OPENSSL_config(NULL);
		])], [
		AC_MSG_RESULT([yes])
	], [
		AC_MSG_RESULT([no])
		AC_MSG_ERROR([Unable to compile a basic program using OpenSSL])
	])
	AC_LANG_POP([C])

	curl diff cat mkdir rm mv automake autoconf
)

urls=(
	http://chiselapp.com/user/rkeene/repository/autoconf/doc/trunk/tcl.m4
	http://chiselapp.com/user/rkeene/repository/autoconf/doc/trunk/shobj.m4
	http://chiselapp.com/user/rkeene/repository/autoconf/doc/trunk/versionscript.m4
	'http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4/ax_check_compile_flag.m4'
)

localFiles=(
	aclocal/tcltls_openssl.m4
)

failed='0'

AC_ARG_ENABLE([debug], AS_HELP_STRING([--enable-debug], [enable debugging parameters]), [
	if test "$enableval" = "yes"; then
		tcltls_debug='true'
	fi
])
if test "$tcltls_debug" = 'true'; then
	AC_DEFINE(TCLEXT_TCLTLS_DEBUG, [1], [Enable debugging build])
	AX_CHECK_COMPILE_FLAG([-fcheck-pointer-bounds], [CFLAGS="$CFLAGS -fcheck-pointer-bounds"])
	AX_CHECK_COMPILE_FLAG([-fsanitize=address], [CFLAGS="$CFLAGS -fsanitize=address"])
	AX_CHECK_COMPILE_FLAG([-fsanitize=undefined], [CFLAGS="$CFLAGS -fsanitize=undefined"])
else
	dnl If we are not doing debugging disable some of the more annoying warnings
	AX_CHECK_COMPILE_FLAG([-Wno-unused-value], [CFLAGS="$CFLAGS -Wno-unused-value"])
	AX_CHECK_COMPILE_FLAG([-Wno-unused-parameter], [CFLAGS="$CFLAGS -Wno-unused-parameter"])
	AX_CHECK_COMPILE_FLAG([-Wno-deprecated-declarations], [CFLAGS="$CFLAGS -Wno-deprecated-declarations"])
fi

dnl Find "xxd" so we can build the tls.tcl.h file
AC_CHECK_PROG([XXD], [xxd], [xxd], [__xxd__not__found])

dnl Find "pkg-config" since we need to use it
AC_CHECK_TOOL([PKGCONFIG], [pkg-config], [false])

dnl Determine if we have been asked to use a fast path if possible
tcltls_ssl_fastpath='yes'
AC_ARG_ENABLE([ssl-fastpath], AS_HELP_STRING([--disable-ssl-fast-path], [disable using the underlying file descriptor for talking directly to the SSL library]), [
	if test "$enableval" = 'no'; then
		tcltls_ssl_fastpath='no'
	fi
])

if test "$tcltls_ssl_fastpath" = 'yes'; then
	AC_DEFINE(TCLTLS_SSL_USE_FASTPATH, [1], [Define this to enable using the underlying file descriptor for talking directly to the SSL library])
fi

dnl Determine if we have been asked to statically link to the SSL library
TCLEXT_TLS_STATIC_SSL='no'
AC_ARG_ENABLE([static-ssl], AS_HELP_STRING([--enable-static-ssl], [enable statically linking to the specified SSL library]), [
	if test "$enableval" = 'yes'; then
		TCLEXT_TLS_STATIC_SSL='yes'
	fi
])

dnl Enable compiler warnings
AX_CHECK_COMPILE_FLAG([-Wall], [CFLAGS="$CFLAGS -Wall"])
AX_CHECK_COMPILE_FLAG([-W], [
	CFLAGS="$CFLAGS -W"
	AX_CHECK_COMPILE_FLAG([-Wno-self-assign], [CFLAGS="$CFLAGS -Wno-self-assign"])
])

dnl Enable hardening
AX_CHECK_COMPILE_FLAG([-fstack-protector-all], [CFLAGS="$CFLAGS -fstack-protector-all"])
AX_CHECK_COMPILE_FLAG([-fno-strict-overflow], [CFLAGS="$CFLAGS -fno-strict-overflow"])
AC_DEFINE([_FORTIFY_SOURCE], [2], [Enable fortification])

dnl XXX:TODO: Automatically determine the SSL library to use
dnl           defaulting to OpenSSL for compatibility reasons
if test "$tcltls_ssl_lib" = 'auto'; then
	tcltls_ssl_lib='openssl'
fi

AC_MSG_CHECKING([which TLS library to use])

	fi

	return 1
}

gen_dh_params_fallback() {
	cat << \_EOF_
DH *get_dh2048()
DH *get_dh2048(void) {
	{
	static unsigned char dh2048_p[]={
	static unsigned char dhp_2048[] = {
		0xC1,0x51,0x58,0x69,0xFB,0xE8,0x6C,0x47,0x2B,0x86,0x61,0x4F,
		0x20,0x2E,0xD3,0xFC,0x19,0xEE,0xB8,0xF3,0x35,0x7D,0xBA,0x86,
		0x2A,0xC3,0xC8,0x6E,0xF4,0x99,0x75,0x65,0xD3,0x7A,0x9E,0xDF,
		0xD4,0x1F,0x88,0xE3,0x17,0xFC,0xA1,0xED,0xA2,0xB6,0x77,0x84,
		0xAA,0x08,0xF2,0x97,0x59,0x7A,0xA0,0x03,0x0D,0x3E,0x7E,0x6D,
		0x65,0x6A,0xA4,0xEA,0x54,0xA9,0x52,0x5F,0x63,0xB4,0xBC,0x98,
		0x4E,0xF6,0xE1,0xA4,0xEE,0x16,0x0A,0xB0,0x01,0xBD,0x9F,0xA1,

		0xA9,0x4D,0xD5,0xFD,0xED,0xF2,0x6D,0x32,0x17,0x97,0x5B,0x06,
		0x60,0x9C,0x5F,0xA3,0x5D,0x34,0x14,0x7E,0x63,0x54,0xE4,0x7E,
		0x09,0x8F,0xBB,0x8E,0xA0,0xD0,0x96,0xAC,0x30,0x20,0x39,0x3B,
		0x8C,0x92,0x65,0x37,0x0A,0x8F,0xEC,0x72,0x8B,0x61,0x7D,0x62,
		0x24,0x54,0xE9,0x1D,0x01,0x68,0x89,0xC4,0x7B,0x3C,0x48,0x62,
		0x9B,0x83,0x11,0x3A,0x0B,0x0D,0xEF,0x5A,0xE4,0x7A,0xA0,0x69,
		0xF4,0x54,0xB5,0x5B,
		};
	static unsigned char dh2048_g[]={
	};
	static unsigned char dhg_2048[] = {
		0x02,
		};
	DH *dh;
	};

	DH *dh = DH_new();;
	BIGNUM *dhp_bn, *dhg_bn;

	if ((dh=DH_new()) == NULL) return(NULL);
	dh->p=BN_bin2bn(dh2048_p,sizeof(dh2048_p),NULL);
	dh->g=BN_bin2bn(dh2048_g,sizeof(dh2048_g),NULL);
	if ((dh->p == NULL) || (dh->g == NULL))
		{ DH_free(dh); return(NULL); }
	if (dh == NULL) {
		return NULL;
	}

	dhp_bn = BN_bin2bn(dhp_2048, sizeof (dhp_2048), NULL);
	dhg_bn = BN_bin2bn(dhg_2048, sizeof (dhg_2048), NULL);

#ifdef TCLTLS_OPENSSL_PRE_1_1_API
	dh->p = dhp_bn;
	dh->g = dhg_bn;

	if (dhp_bn == NULL || dhg_bn == NULL) {
#else
	if (dhp_bn == NULL || dhg_bn == NULL || !DH_set0_pqg(dh, dhp_bn, NULL, dhg_bn)) {
#endif
		DH_free(dh);
		BN_free(dhp_bn);
		BN_free(dhg_bn);
		return(NULL);
	}

	return(dh);
	}
}
_EOF_
}

# Enable support for giving the same DH params each time
if [ "$1" = 'fallback' ]; then
	gen_dh_params_fallback && exit 0

	exit 1
fi

echo "*****************************"
echo "** Generating DH Primes.   **"
echo "** This will take a while. **"
echo "*****************************"
gen_dh_params_openssl && exit 0
gen_dh_params_remote && exit 0
gen_dh_params_fallback && exit 0

exit 1

if {[lsearch [namespace children] ::tcltest] == -1} {
    package require tcltest
    namespace import ::tcltest::*
}

set ::tcltest::testSingleFile false
set ::tcltest::testsDirectory [file dir [info script]]
::tcltest::configure -verbose start

# We should ensure that the testsDirectory is absolute.
# This was introduced in Tcl 8.3+'s tcltest, so we need a catch.
catch {::tcltest::normalizePath ::tcltest::testsDirectory}

puts stdout "Tests running in interp:  [info nameofexecutable]"
puts stdout "Tests running in working dir:  $::tcltest::testsDirectory"

	    set doTestsWithRemoteServer 0
	} else {
	    set remoteServerIP 127.0.0.1
	    set remoteFile [file join [pwd] remote.tcl]
	    if {[catch {set remoteProcChan \
		    [open "|[list $::tcltest::tcltest $remoteFile \
		    -serverIsSilent -port $remoteServerPort \
		    -address $remoteServerIP]" w+]} msg] == 0} {
		    -address $remoteServerIP] 2> /dev/null" w+]} msg] == 0} {
		after 1000
		if {[catch {set commandSocket [tls::socket -cafile $caCert \
			-certfile $clientCert -keyfile $clientKey \
			$remoteServerIP $remoteServerPort]} msg] == 0} {
		    fconfigure $commandSocket -translation crlf -buffering line
		} else {
		    set noRemoteTestReason $msg

	puts ready
	vwait x
	after cancel $timer
	close $f
	puts $x
    }
    close $f
    set f [open "|[list $::tcltest::tcltest script]" r]
    set f [open "|[list $::tcltest::tcltest script] 2> /dev/null" r]
    gets $f x
    if {[catch {tls::socket -certfile $clientCert -cafile $caCert \
	-keyfile $clientKey 127.0.0.1 8828} msg]} {
        set x $msg
    } else {
        lappend x [gets $f]
        close $msg

	}
	puts ready
	vwait x
	after cancel $timer
	close $f
    }
    close $f
    set f [open "|[list $::tcltest::tcltest script]" r]
    set f [open "|[list $::tcltest::tcltest script] 2> /dev/null" r]
    gets $f x
    global port
    if {[catch {tls::socket -myport $port \
	-certfile $clientCert -cafile $caCert \
	-keyfile $clientKey 127.0.0.1 8829} sock]} {
        set x $sock
	catch {close [tls::socket 127.0.0.1 8829]}

	}
	puts ready
	vwait x
	after cancel $timer
	close $f
    }
    close $f
    set f [open "|[list $::tcltest::tcltest script]" r]
    set f [open "|[list $::tcltest::tcltest script] 2> /dev/null" r]
    gets $f x
    if {[catch {tls::socket -myaddr 127.0.0.1 \
	-certfile $clientCert -cafile $caCert \
	-keyfile $clientKey 127.0.0.1 8830} sock]} {
        set x $sock
    } else {
        puts $sock hello

	}
	puts ready
	vwait x
	after cancel $timer
	close $f
    }
    close $f
    set f [open "|[list $::tcltest::tcltest script]" r]
    set f [open "|[list $::tcltest::tcltest script] 2> /dev/null" r]
    gets $f x
    if {[catch {tls::socket -certfile $clientCert -cafile $caCert \
	-keyfile $clientKey [info hostname] 8831} sock]} {
        set x $sock
    } else {
        puts $sock hello
	flush $sock

	}
	puts ready
	vwait x
	after cancel $timer
	close $f
    }
    close $f
    set f [open "|[list $::tcltest::tcltest script]" r]
    set f [open "|[list $::tcltest::tcltest script] 2> /dev/null" r]
    gets $f x
    if {[catch {tls::socket -certfile $clientCert -cafile $caCert \
	-keyfile $clientKey 127.0.0.1 8832} sock]} {
        set x $sock
    } else {
        puts $sock hello
	flush $sock

	puts ready
	vwait x
	after cancel $timer
	close $f
	puts done
    }
    close $f
    set f [open "|[list $::tcltest::tcltest script]" r]
    set f [open "|[list $::tcltest::tcltest script] 2> /dev/null" r]
    gets $f
    set s [tls::socket -certfile $clientCert -cafile $caCert \
	-keyfile $clientKey 127.0.0.1 8834]
    fconfigure $s -buffering line -translation lf
    puts $s "hello abcdefghijklmnop"
    after 1000
    set x [gets $s]

	set timer [after 20000 "set x done"]
	vwait x
	after cancel $timer
	close $f
	puts "done $i"
    }
    close $f
    set f [open "|[list $::tcltest::tcltest script]" r]
    set f [open "|[list $::tcltest::tcltest script] 2> /dev/null" r]
    gets $f
    set s [tls::socket -certfile $clientCert -cafile $caCert \
	-keyfile $clientKey 127.0.0.1 8835]
    fconfigure $s -buffering line
    catch {
	for {set x 0} {$x < 50} {incr x} {
	    puts $s "hello abcdefghijklmnop"

	puts ready
	vwait x
	after cancel $timer
	close $f
	puts $x
    }
    close $f
    set f [open "|[list $::tcltest::tcltest script]" r]
    set f [open "|[list $::tcltest::tcltest script] 2> /dev/null" r]
    gets $f x
    if {[catch {tls::socket 127.0.0.1 8828} msg]} {
        set x $msg
    } else {
        lappend x [gets $f]
        close $msg
    }

    puts $f "set f \[tls::socket -server accept -certfile $serverCert -cafile $caCert -keyfile $serverKey 8828 \]"
    puts $f {
	puts ready
	gets stdin
	close $f
    }
    close $f
    set f [open "|[list $::tcltest::tcltest script]" r+]
    set f [open "|[list $::tcltest::tcltest script] 2> /dev/null" r+]
    gets $f
    set x [list [catch {tls::socket \
	    -certfile $clientCert -cafile $caCert -keyfile $clientKey \
    	-server accept 8828} msg] \
		$msg]
    puts $f bye
    close $f

	after cancel $t2
	vwait x
	after cancel $t3
	close $s
	puts $x
    }
    close $f
    set f [open "|[list $::tcltest::tcltest script]" r+]
    set f [open "|[list $::tcltest::tcltest script] 2> /dev/null" r+]
    set x [gets $f]
    set s1 [tls::socket \
	    -certfile $clientCert -cafile $caCert -keyfile $clientKey \
	    127.0.0.1 8828]
    fconfigure $s1 -buffering line
    set s2 [tls::socket \
	    -certfile $clientCert -cafile $caCert -keyfile $clientKey \
	    127.0.0.1 8828]
    fconfigure $s2 -buffering line
    set s3 [tls::socket \
	    -certfile $clientCert -cafile $caCert -keyfile $clientKey \
	    127.0.0.1 8828]
    fconfigure $s3 -buffering line
    for {set i 0} {$i < 100} {incr i} {
	puts $s1 hello,s1
	puts $s1 hello,tlsIO-3.2,s1
	gets $s1
	puts $s2 hello,s2
	puts $s2 hello,tlsIO-3.2,s2
	gets $s2
	puts $s3 hello,s3
	puts $s3 hello,tlsIO-3.2,s3
	gets $s3
    }
    close $s1
    close $s2
    close $s3
    lappend x [gets $f]
    close $f

	    gets $s
	}
	close $s
	puts bye
	gets stdin
    }
    close $f
    set p1 [open "|[list $::tcltest::tcltest script]" r+]
    set p1 [open "|[list $::tcltest::tcltest script] 2> /dev/null" r+]
    fconfigure $p1 -buffering line
    set p2 [open "|[list $::tcltest::tcltest script]" r+]
    set p2 [open "|[list $::tcltest::tcltest script] 2> /dev/null" r+]
    fconfigure $p2 -buffering line
    set p3 [open "|[list $::tcltest::tcltest script]" r+]
    set p3 [open "|[list $::tcltest::tcltest script] 2> /dev/null" r+]
    fconfigure $p3 -buffering line
    proc accept {s a p} {
	fconfigure $s -buffering line
	fileevent $s readable [list echo $s]
    }
    proc echo {s} {
	global x

    puts $f [list set auto_path $auto_path]
    puts $f {
    	package require tls
	gets stdin
    }
    puts $f [list tls::socket -cafile $caCert 127.0.0.1 8848]
    close $f
    set f [open "|[list $::tcltest::tcltest script]" r+]
    set f [open "|[list $::tcltest::tcltest script] 2> /dev/null" r+]
    proc bgerror args {
	global x
	set x $args
    }
    proc accept {s a p} {expr 10 / 0}
    set s [tls::socket -server accept \
	    -certfile $serverCert -cafile $caCert -keyfile $serverKey 8848]

	}
	puts ready
	set timer [after 10000 "set x timed_out"]
	vwait x
	after cancel $timer
    }
    close $f
    set f [open "|[list $::tcltest::tcltest script]" r]
    set f [open "|[list $::tcltest::tcltest script] 2> /dev/null" r]
    gets $f
    set s [tls::socket \
	    -certfile $clientCert -cafile $caCert -keyfile $clientKey \
	    127.0.0.1 8820]
    set p [fconfigure $s -peername]
    close $s
    close $f

	}
	puts ready
	set timer [after 10000 "set x timed_out"]
	vwait x
	after cancel $timer
    }
    close $f
    set f [open "|[list $::tcltest::tcltest script]" r]
    set f [open "|[list $::tcltest::tcltest script] 2> /dev/null" r]
    gets $f
    set s [tls::socket \
	    -certfile $clientCert -cafile $caCert -keyfile $clientKey \
	    127.0.0.1 8821]
    set p [fconfigure $s -sockname]
    close $s
    close $f

	    $remoteServerIP 8836]
    fconfigure $s2 -buffering line
    set s3 [tls::socket \
	    -certfile $clientCert -cafile $caCert -keyfile $clientKey \
	    $remoteServerIP 8836]
    fconfigure $s3 -buffering line
    for {set i 0} {$i < 100} {incr i} {
	puts $s1 hello,s1
	puts $s1 hello,tlsIO-11.7,s1
	gets $s1
	puts $s2 hello,s2
	puts $s2 hello,tlsIO-11.7,s2
	gets $s2
	puts $s3 hello,s3
	puts $s3 hello,tlsIO-11.7,s3
	gets $s3
    }
    close $s1
    close $s2
    close $s3
    sendCommand {close $socket10_9_test_server}
    set i

        set ::done HAND
        catch {tls::handshake $sock} msg
        set ::done $msg
    } 
    # NOTE: when doing an in-process client/server test, both sides need
    # to be non-blocking for the TLS handshake

    # Server - Only accept TLS 1 or higher
    # Server - Only accept TLS 1.2
    set s [tls::socket \
               -certfile $serverCert -cafile $caCert -keyfile $serverKey \
               -request 0 -require 0 -ssl2 0 -ssl3 0 -tls1 1 -tls1.1 1 -tls1.2 1 \
               -request 0 -require 0 -ssl2 0 -ssl3 0 -tls1 0 -tls1.1 0 -tls1.2 1 \
               -server Accept 8831]
    # Client - Only propose SSL3
    # Client - Only propose TLS1.0
    set c [tls::socket -async \
               -cafile $caCert \
               -request 0 -require 0 -ssl2 0 -ssl3 1 -tls1 0 -tls1.1 0 -tls1.2 0 \
               -request 0 -require 0 -ssl2 0 -ssl3 0 -tls1 1 -tls1.1 0 -tls1.2 0 \
               [info hostname] 8831]
    fconfigure $c -blocking 0
    puts $c a ; flush $c
    after 5000 [list set ::done timeout]
    vwait ::done
    switch -exact -- $::done {
        "handshake failed: wrong ssl version" {
            set ::done "handshake failed: wrong version number"
        }
    }
    set ::done
} {handshake failed: wrong version number}

# cleanup
if {[string match sock* $commandSocket] == 1} {
   puts $commandSocket exit
   flush $commandSocket
}
catch {close $commandSocket}
catch {close $remoteProcChan}
::tcltest::cleanupTests
flush stdout
return

 */

#define F2N( key, dsp) \
	(((key) == NULL) ? (char *) NULL : \
		Tcl_TranslateFileName(interp, (key), (dsp)))
#define REASON()	ERR_reason_error_string(ERR_get_error())

static void	InfoCallback _ANSI_ARGS_ ((CONST SSL *ssl, int where, int ret));
static void	InfoCallback(CONST SSL *ssl, int where, int ret);

static int	CiphersObjCmd _ANSI_ARGS_ ((ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
static int	CiphersObjCmd(ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]);

static int	HandshakeObjCmd _ANSI_ARGS_ ((ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
static int	HandshakeObjCmd(ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]);

static int	ImportObjCmd _ANSI_ARGS_ ((ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
static int	ImportObjCmd(ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]);

static int	StatusObjCmd _ANSI_ARGS_ ((ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
static int	StatusObjCmd(ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]);

static int	VersionObjCmd _ANSI_ARGS_ ((ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
static int	VersionObjCmd(ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]);

static int	MiscObjCmd _ANSI_ARGS_ ((ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
static int	MiscObjCmd(ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]);

static int	UnimportObjCmd _ANSI_ARGS_ ((ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
static int	UnimportObjCmd(ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]);

static SSL_CTX *CTX_Init _ANSI_ARGS_((State *statePtr, int proto, char *key,
static SSL_CTX *CTX_Init(State *statePtr, int proto, char *key,
			char *cert, char *CAdir, char *CAfile, char *ciphers,
			char *DHparams));
			char *DHparams);

static int	TlsLibInit _ANSI_ARGS_ ((void)) ;
static int	TlsLibInit(int uninitialize);

#define TLS_PROTO_SSL2		0x01
#define TLS_PROTO_SSL3		0x02
#define TLS_PROTO_TLS1		0x04
#define TLS_PROTO_TLS1_1	0x08
#define TLS_PROTO_TLS1_2	0x10
#define ENABLED(flag, mask)	(((flag) & (mask)) == (mask))

/*
 * Static data structures
 */

#ifndef OPENSSL_NO_DH
#include "dh_params.h"
#endif

/*
 * Defined in Tls_Init to determine what kind of channels we are using
 * (old-style 8.2.0-8.3.1 or new-style 8.3.2+).
 */
int channelTypeVersion = TLS_CHANNEL_VERSION_2;

/*
 * We lose the tcl password callback when we use the RSA BSAFE SSL-C 1.1.2
 * libraries instead of the current OpenSSL libraries.
 */

#ifdef BSAFE
#define PRE_OPENSSL_0_9_4 1

#include <openssl/crypto.h>

/*
 * Threaded operation requires locking callbacks
 * Based from /crypto/cryptlib.c of OpenSSL and NSOpenSSL.
 */

static Tcl_Mutex locks[CRYPTO_NUM_LOCKS];
static Tcl_Mutex *locks = NULL;
static int locksCount = 0;
static Tcl_Mutex init_mx;

static void          CryptoThreadLockCallback (int mode, int n, const char *file, int line);
static unsigned long CryptoThreadIdCallback   (void);

static void
CryptoThreadLockCallback(int mode, int n, const char *file, int line)
{
    if (mode & CRYPTO_LOCK) {
       Tcl_MutexLock(&locks[n]);
    } else {
       Tcl_MutexUnlock(&locks[n]);
    }
}
void CryptoThreadLockCallback(int mode, int n, const char *file, int line) {

	if (mode & CRYPTO_LOCK) {
		/* This debugging is turned off by default -- it's too noisy. */
		/* dprintf("Called to lock (n=%i of %i)", n, locksCount); */
		Tcl_MutexLock(&locks[n]);
	} else {
		/* dprintf("Called to unlock (n=%i of %i)", n, locksCount); */
		Tcl_MutexUnlock(&locks[n]);
	}

	dprintf("Returning");

	return;
	file = file;
	line = line;
}
static unsigned long
CryptoThreadIdCallback(void)
{
    return (unsigned long) Tcl_GetCurrentThread();

unsigned long CryptoThreadIdCallback(void) {
	unsigned long ret;

	dprintf("Called");

	ret = (unsigned long) Tcl_GetCurrentThread();

	dprintf("Returning %lu", ret);

	return(ret);
}
#endif /* OPENSSL_THREADS */
#endif /* TCL_THREADS */


/*
 *-------------------------------------------------------------------

 */
static void
InfoCallback(CONST SSL *ssl, int where, int ret)
{
    State *statePtr = (State*)SSL_get_app_data((SSL *)ssl);
    Tcl_Obj *cmdPtr;
    char *major; char *minor;

    dprintf("Called");

    if (statePtr->callback == (Tcl_Obj*)NULL)
	return;

    cmdPtr = Tcl_DuplicateObj(statePtr->callback);

#if 0

 */
static int
VerifyCallback(int ok, X509_STORE_CTX *ctx)
{
    Tcl_Obj *cmdPtr, *result;
    char *errStr, *string;
    int length;
    SSL   *ssl		= (SSL*)X509_STORE_CTX_get_app_data(ctx);
    SSL   *ssl		= (SSL*)X509_STORE_CTX_get_ex_data(ctx, SSL_get_ex_data_X509_STORE_CTX_idx());
    X509  *cert		= X509_STORE_CTX_get_current_cert(ctx);
    State *statePtr	= (State*)SSL_get_app_data(ssl);
    int depth		= X509_STORE_CTX_get_error_depth(ctx);
    int err		= X509_STORE_CTX_get_error(ctx);

    dprintf("Verify: %d", ok);

 *-------------------------------------------------------------------
 */
void
Tls_Error(State *statePtr, char *msg)
{
    Tcl_Obj *cmdPtr;

    dprintf("Called");

    if (msg && *msg) {
	Tcl_SetErrorCode(statePtr->interp, "SSL", msg, (char *)NULL);
    } else {
	msg = Tcl_GetStringFromObj(Tcl_GetObjResult(statePtr->interp), NULL);
    }
    statePtr->err = msg;

 * No way to handle user-data therefore no way without a global
 * variable to access the Tcl interpreter.
*/
static int
PasswordCallback(char *buf, int size, int verify)
{
    return -1;
    	buf = buf;
	size = size;
	verify = verify;
}
#else
static int
PasswordCallback(char *buf, int size, int verify, void *udata)
{
    State *statePtr	= (State *) udata;
    Tcl_Interp *interp	= statePtr->interp;
    Tcl_Obj *cmdPtr;
    int result;

    dprintf("Called");

    if (statePtr->password == NULL) {
	if (Tcl_EvalEx(interp, "tls::password", -1, TCL_EVAL_GLOBAL)
		== TCL_OK) {
	    char *ret = (char *) Tcl_GetStringResult(interp);
	    strncpy(buf, ret, (size_t) size);
	    return (int)strlen(ret);

    if (result == TCL_OK) {
	char *ret = (char *) Tcl_GetStringResult(interp);
	strncpy(buf, ret, (size_t) size);
	return (int)strlen(ret);
    } else {
	return -1;
    }
    	verify = verify;
}
#endif

/*
 *-------------------------------------------------------------------
 *
 * CiphersObjCmd -- list available ciphers

    };
    Tcl_Obj *objPtr;
    SSL_CTX *ctx = NULL;
    SSL *ssl = NULL;
    STACK_OF(SSL_CIPHER) *sk;
    char *cp, buf[BUFSIZ];
    int index, verbose = 0;

    dprintf("Called");

    if (objc < 2 || objc > 3) {
	Tcl_WrongNumArgs(interp, 1, objv, "protocol ?verbose?");
	return TCL_ERROR;
    }
    if (Tcl_GetIndexFromObj( interp, objv[1], protocols, "protocol", 0,
	&index) != TCL_OK) {

	}
    }
    SSL_free(ssl);
    SSL_CTX_free(ctx);

    Tcl_SetObjResult( interp, objPtr);
    return TCL_OK;
    	clientData = clientData;
}

/*
 *-------------------------------------------------------------------
 *
 * HandshakeObjCmd --
 *

    int objc;
    Tcl_Obj *CONST objv[];
{
    Tcl_Channel chan;		/* The channel to set a mode on. */
    State *statePtr;		/* client state for ssl socket */
    int ret = 1;

    dprintf("Called");

    if (objc != 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "channel");
	return TCL_ERROR;
    }

    chan = Tcl_GetChannel(interp, Tcl_GetStringFromObj(objv[1], NULL), NULL);
    if (chan == (Tcl_Channel) NULL) {
	return TCL_ERROR;
    }
    if (channelTypeVersion == TLS_CHANNEL_VERSION_2) {
	/*
	 * Make sure to operate on the topmost channel
	 */
	chan = Tcl_GetTopChannel(chan);

    /*
     * Make sure to operate on the topmost channel
     */
    chan = Tcl_GetTopChannel(chan);
    }
    if (Tcl_GetChannelType(chan) != Tls_ChannelType()) {
	Tcl_AppendResult(interp, "bad channel \"", Tcl_GetChannelName(chan),
		"\": not a TLS channel", NULL);
	return TCL_ERROR;
    }
    statePtr = (State *)Tcl_GetChannelInstanceData(chan);

    if (!SSL_is_init_finished(statePtr->ssl)) {
	int err = 0;
        dprintf("Calling Tls_WaitForConnect");
	ret = Tls_WaitForConnect(statePtr, &err);
        dprintf("Tls_WaitForConnect returned: %i", ret);

	if ((statePtr->flags & TLS_TCL_ASYNC) && err == EAGAIN) {
            dprintf("Async set and err = EAGAIN");
	    ret = 0;
	}

	if (ret < 0) {
	    CONST char *errStr = statePtr->err;
	    Tcl_ResetResult(interp);
	    Tcl_SetErrno(err);

	    if (!errStr || *errStr == 0) {
		errStr = Tcl_PosixError(interp);
	    }

	    Tcl_AppendResult(interp, "handshake failed: ", errStr,
		    (char *) NULL);
	    Tcl_AppendResult(interp, "handshake failed: ", errStr, (char *) NULL);
            dprintf("Returning TCL_ERROR with handshake failed: %s", errStr);
	    return TCL_ERROR;
	}
    }

    Tcl_SetObjResult(interp, Tcl_NewIntObj(ret));
    return TCL_OK;
    	clientData = clientData;
}

/*
 *-------------------------------------------------------------------
 *
 * ImportObjCmd --
 *

    int tls1_2 = 0;
#else
    int tls1_2 = 1;
#endif
    int proto = 0;
    int verify = 0, require = 0, request = 1;

    dprintf("Called");

    if (objc < 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "channel ?options?");
	return TCL_ERROR;
    }

    chan = Tcl_GetChannel(interp, Tcl_GetStringFromObj(objv[1], NULL), NULL);
    if (chan == (Tcl_Channel) NULL) {
	return TCL_ERROR;
    }
    if (channelTypeVersion == TLS_CHANNEL_VERSION_2) {
	/*
	 * Make sure to operate on the topmost channel
	 */
	chan = Tcl_GetTopChannel(chan);

    /*
     * Make sure to operate on the topmost channel
     */
    chan = Tcl_GetTopChannel(chan);
    }

    for (idx = 2; idx < objc; idx++) {
	char *opt = Tcl_GetStringFromObj(objv[idx], NULL);

	if (opt[0] != '-')
	    break;

	int mode;
	/* Get the "model" context */
	chan = Tcl_GetChannel(interp, model, &mode);
	if (chan == (Tcl_Channel) NULL) {
	    Tls_Free((char *) statePtr);
	    return TCL_ERROR;
	}
	if (channelTypeVersion == TLS_CHANNEL_VERSION_2) {
	    /*
	     * Make sure to operate on the topmost channel
	     */
	    chan = Tcl_GetTopChannel(chan);

        /*
         * Make sure to operate on the topmost channel
         */
        chan = Tcl_GetTopChannel(chan);
	}
	if (Tcl_GetChannelType(chan) != Tls_ChannelType()) {
	    Tcl_AppendResult(interp, "bad channel \"",
		    Tcl_GetChannelName(chan), "\": not a TLS channel", NULL);
	    Tls_Free((char *) statePtr);
	    return TCL_ERROR;
	}
	ctx = ((State *)Tcl_GetChannelInstanceData(chan))->ctx;

    /*
     * We need to make sure that the channel works in binary (for the
     * encryption not to get goofed up).
     * We only want to adjust the buffering in pre-v2 channels, where
     * each channel in the stack maintained its own buffers.
     */
    Tcl_SetChannelOption(interp, chan, "-translation", "binary");
    if (channelTypeVersion == TLS_CHANNEL_VERSION_1) {
	Tcl_SetChannelOption(interp, chan, "-buffering", "none");
    Tcl_SetChannelOption(interp, chan, "-blocking", "true");
    }

    dprintf("Consuming Tcl channel %s", Tcl_GetChannelName(chan));
    if (channelTypeVersion == TLS_CHANNEL_VERSION_2) {
	statePtr->self = Tcl_StackChannel(interp, Tls_ChannelType(),
    statePtr->self = Tcl_StackChannel(interp, Tls_ChannelType(), (ClientData) statePtr, (TCL_READABLE | TCL_WRITABLE), chan);
		(ClientData) statePtr, (TCL_READABLE | TCL_WRITABLE), chan);
    } else {
	statePtr->self = chan;
    dprintf("Created channel named %s", Tcl_GetChannelName(statePtr->self));
	Tcl_StackChannel(interp, Tls_ChannelType(),
		(ClientData) statePtr, (TCL_READABLE | TCL_WRITABLE), chan);
    }
    if (statePtr->self == (Tcl_Channel) NULL) {
	/*
	 * No use of Tcl_EventuallyFree because no possible Tcl_Preserve.
	 */
	Tls_Free((char *) statePtr);
	return TCL_ERROR;
    }

    SSL_set_app_data(statePtr->ssl, (VOID *)statePtr);	/* point back to us */

    SSL_set_verify(statePtr->ssl, verify, VerifyCallback);

    SSL_CTX_set_info_callback(statePtr->ctx, InfoCallback);

    /* Create Tcl_Channel BIO Handler */
    statePtr->p_bio	= BIO_new_tcl(statePtr, BIO_CLOSE);
    statePtr->p_bio	= BIO_new_tcl(statePtr, BIO_NOCLOSE);
    statePtr->bio	= BIO_new(BIO_f_ssl());

    if (server) {
	statePtr->flags |= TLS_TCL_SERVER;
	SSL_set_accept_state(statePtr->ssl);
    } else {
	SSL_set_connect_state(statePtr->ssl);
    }
    SSL_set_bio(statePtr->ssl, statePtr->p_bio, statePtr->p_bio);
    BIO_set_ssl(statePtr->bio, statePtr->ssl, BIO_NOCLOSE);

    /*
     * End of SSL Init
     */
    dprintf("Returning %s", Tcl_GetChannelName(statePtr->self));
    Tcl_SetResult(interp, (char *) Tcl_GetChannelName(statePtr->self),
	    TCL_VOLATILE);
    return TCL_OK;
    	clientData = clientData;
}

/*
 *-------------------------------------------------------------------
 *
 * UnimportObjCmd --
 *

    ClientData clientData;	/* Not used. */
    Tcl_Interp *interp;
    int objc;
    Tcl_Obj *CONST objv[];
{
    Tcl_Channel chan;		/* The channel to set a mode on. */

    dprintf("Called");

    if (objc != 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "channel");
	return TCL_ERROR;
    }

    chan = Tcl_GetChannel(interp, Tcl_GetString(objv[1]), NULL);
    if (chan == (Tcl_Channel) NULL) {
	return TCL_ERROR;
    }

    if (channelTypeVersion == TLS_CHANNEL_VERSION_2) {
	/*
	 * Make sure to operate on the topmost channel
	 */
	chan = Tcl_GetTopChannel(chan);
    /*
     * Make sure to operate on the topmost channel
     */
    chan = Tcl_GetTopChannel(chan);
    }

    if (Tcl_GetChannelType(chan) != Tls_ChannelType()) {
	Tcl_AppendResult(interp, "bad channel \"", Tcl_GetChannelName(chan),
		"\": not a TLS channel", NULL);
	return TCL_ERROR;
    }

    if (Tcl_UnstackChannel(interp, chan) == TCL_ERROR) {
	return TCL_ERROR;
    }

    return TCL_OK;
    	clientData = clientData;
}

/*
 *-------------------------------------------------------------------
 *
 * CTX_Init -- construct a SSL_CTX instance
 *

{
    Tcl_Interp *interp = statePtr->interp;
    SSL_CTX *ctx = NULL;
    Tcl_DString ds;
    Tcl_DString ds1;
    int off = 0;
    const SSL_METHOD *method;

    dprintf("Called");

    if (!proto) {
	Tcl_AppendResult(interp, "no valid protocol selected", NULL);
	return (SSL_CTX *)0;
    }

    /* create SSL context */

    State *statePtr;
    X509 *peer;
    Tcl_Obj *objPtr;
    Tcl_Channel chan;
    char *channelName, *ciphers;
    int mode;

    dprintf("Called");

    switch (objc) {
	case 2:
	    channelName = Tcl_GetStringFromObj(objv[1], NULL);
	    break;

	case 3:
	    if (!strcmp (Tcl_GetString (objv[1]), "-local")) {
		channelName = Tcl_GetStringFromObj(objv[2], NULL);
		break;
	    }
	    /* else fall... */
	default:
	    Tcl_WrongNumArgs(interp, 1, objv, "?-local? channel");
	    return TCL_ERROR;
    }

    chan = Tcl_GetChannel(interp, channelName, &mode);
    if (chan == (Tcl_Channel) NULL) {
	return TCL_ERROR;
    }
    if (channelTypeVersion == TLS_CHANNEL_VERSION_2) {
	/*
	 * Make sure to operate on the topmost channel
	 */
	chan = Tcl_GetTopChannel(chan);
    /*
     * Make sure to operate on the topmost channel
     */
    chan = Tcl_GetTopChannel(chan);
    }
    if (Tcl_GetChannelType(chan) != Tls_ChannelType()) {
	Tcl_AppendResult(interp, "bad channel \"", Tcl_GetChannelName(chan),
		"\": not a TLS channel", NULL);
	return TCL_ERROR;
    }
    statePtr = (State *) Tcl_GetChannelInstanceData(chan);
    if (objc == 2) {

	Tcl_ListObjAppendElement(interp, objPtr,
		Tcl_NewStringObj("cipher", -1));
	Tcl_ListObjAppendElement(interp, objPtr,
		Tcl_NewStringObj(SSL_get_cipher(statePtr->ssl), -1));
    }
    Tcl_SetObjResult( interp, objPtr);
    return TCL_OK;
    	clientData = clientData;
}

/*
 *-------------------------------------------------------------------
 *
 * VersionObjCmd -- return version string from OpenSSL.
 *

VersionObjCmd(clientData, interp, objc, objv)
    ClientData clientData;	/* Not used. */
    Tcl_Interp *interp;
    int objc;
    Tcl_Obj	*CONST objv[];
{
    Tcl_Obj *objPtr;

    dprintf("Called");

    objPtr = Tcl_NewStringObj(OPENSSL_VERSION_TEXT, -1);

    Tcl_SetObjResult(interp, objPtr);
    return TCL_OK;
    	clientData = clientData;
    	objc = objc;
    	objv = objv;
}

/*
 *-------------------------------------------------------------------
 *
 * MiscObjCmd -- misc commands
 *

    Tcl_Interp *interp;
    int objc;
    Tcl_Obj	*CONST objv[];
{
    static CONST84 char *commands [] = { "req", NULL };
    enum command { C_REQ, C_DUMMY };
    int cmd;

    dprintf("Called");

    if (objc < 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "subcommand ?args?");
	return TCL_ERROR;
    }
    if (Tcl_GetIndexFromObj(interp, objv[1], commands,
	    "command", 0,&cmd) != TCL_OK) {

	    }
	}
	break;
    default:
	break;
    }
    return TCL_OK;
    	clientData = clientData;
}

/*
 *-------------------------------------------------------------------
 *
 * Tls_Free --
 *

 *
 *-------------------------------------------------------------------
 */
void
Tls_Free( char *blockPtr )
{
    State *statePtr = (State *)blockPtr;

    dprintf("Called");

    Tls_Clean(statePtr);
    ckfree(blockPtr);
}

/*
 *-------------------------------------------------------------------

 *	none
 *
 * Side effects:
 *	Frees all the state
 *
 *-------------------------------------------------------------------
 */
void
Tls_Clean(State *statePtr)
{
void Tls_Clean(State *statePtr) {
    dprintf("Called");

    /*
     * we're assuming here that we're single-threaded
     */

    if (statePtr->timer != (Tcl_TimerToken) NULL) {
	Tcl_DeleteTimerHandler(statePtr->timer);
	statePtr->timer = NULL;
    }

    if (statePtr->bio) {
	/* This will call SSL_shutdown. Bug 1414045 */

	Tcl_DecrRefCount(statePtr->callback);
	statePtr->callback = NULL;
    }
    if (statePtr->password) {
	Tcl_DecrRefCount(statePtr->password);
	statePtr->password = NULL;
    }

    dprintf("Returning");
}

/*
 *-------------------------------------------------------------------
 *
 * Tls_Init --
 *
 *	This is a package initialization procedure, which is called
 *	by Tcl when this package is to be added to an interpreter.
 *
 * Results:  Ssl configured and loaded
 *
 * Side effects:
 *	 create the ssl command, initialise ssl context
 *
 *-------------------------------------------------------------------
 */

int
Tls_Init(Tcl_Interp *interp)		/* Interpreter in which the package is
int Tls_Init(Tcl_Interp *interp) {
					 * to be made available. */
{
    const char tlsTclInitScript[] = {
	const char tlsTclInitScript[] = {
#include "tls.tcl.h"
            , 0x00
    };
	};

    int major, minor, patchlevel, release;
        dprintf("Called");

    /*
	/*
     * The original 8.2.0 stacked channel implementation (and the patch
     * that preceded it) had problems with scalability and robustness.
     * These were address in 8.3.2 / 8.4a2, so we now require that as a
     * minimum for TLS 1.4+.  We only support 8.2+ now (8.3.2+ preferred).
     */
    if (
	 * We only support Tcl 8.4 or newer
	 */
	if (
#ifdef USE_TCL_STUBS
	Tcl_InitStubs(interp, "8.2", 0)
	    Tcl_InitStubs(interp, "8.4", 0)
#else
	Tcl_PkgRequire(interp, "Tcl", "8.2", 0)
	    Tcl_PkgRequire(interp, "Tcl", "8.4", 0)
#endif
	== NULL) {
	return TCL_ERROR;
    }
	     == NULL) {
		return TCL_ERROR;
	}

    /*
     * Get the version so we can runtime switch on available functionality.
     * TLS should really only be used in 8.3.2+, but the other works for
     * some limited functionality, so an attempt at support is made.
     */
    Tcl_GetVersion(&major, &minor, &patchlevel, &release);
    if ((major > 8) || ((major == 8) && ((minor > 3) || ((minor == 3) &&
	    (release == TCL_FINAL_RELEASE) && (patchlevel >= 2))))) {
	/* 8.3.2+ */
	channelTypeVersion = TLS_CHANNEL_VERSION_2;
    } else {
	/* 8.2.0 - 8.3.1 */
	channelTypeVersion = TLS_CHANNEL_VERSION_1;
    }

    if (TlsLibInit() != TCL_OK) {
	Tcl_AppendResult(interp, "could not initialize SSL library", NULL);
	return TCL_ERROR;
    }
	if (TlsLibInit(0) != TCL_OK) {
		Tcl_AppendResult(interp, "could not initialize SSL library", NULL);
		return TCL_ERROR;
	}

    Tcl_CreateObjCommand(interp, "tls::ciphers", CiphersObjCmd,
	Tcl_CreateObjCommand(interp, "tls::ciphers", CiphersObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
	    (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);

    Tcl_CreateObjCommand(interp, "tls::handshake", HandshakeObjCmd,
	Tcl_CreateObjCommand(interp, "tls::handshake", HandshakeObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
	    (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);

    Tcl_CreateObjCommand(interp, "tls::import", ImportObjCmd,
	Tcl_CreateObjCommand(interp, "tls::import", ImportObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
	    (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);

    Tcl_CreateObjCommand(interp, "tls::unimport", UnimportObjCmd,
	Tcl_CreateObjCommand(interp, "tls::unimport", UnimportObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
	    (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);

    Tcl_CreateObjCommand(interp, "tls::status", StatusObjCmd,
	Tcl_CreateObjCommand(interp, "tls::status", StatusObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
	    (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);

    Tcl_CreateObjCommand(interp, "tls::version", VersionObjCmd,
	Tcl_CreateObjCommand(interp, "tls::version", VersionObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
	    (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);

    Tcl_CreateObjCommand(interp, "tls::misc", MiscObjCmd,
	Tcl_CreateObjCommand(interp, "tls::misc", MiscObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
	    (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);

    if (interp) {
        Tcl_Eval(interp, tlsTclInitScript);
    }
	if (interp) {
		Tcl_Eval(interp, tlsTclInitScript);
	}

    return Tcl_PkgProvide(interp, "tls", PACKAGE_VERSION);
	return(Tcl_PkgProvide(interp, "tls", PACKAGE_VERSION));
}


/*
 *------------------------------------------------------*
 *
 *	Tls_SafeInit --
 *
 *	------------------------------------------------*
 *	Standard procedure required by 'load'. 
 *	Initializes this extension for a safe interpreter.
 *	------------------------------------------------*
 *
 *	Sideeffects:
 *		As of 'Tls_Init'
 *
 *	Result:
 *		A standard Tcl error code.
 *
 *------------------------------------------------------*
 */

int
Tls_SafeInit (Tcl_Interp* interp)
int Tls_SafeInit(Tcl_Interp *interp) {
{
    return Tls_Init (interp);
	dprintf("Called");
	return(Tls_Init(interp));
}


/*
 *------------------------------------------------------*
 *
 *	TlsLibInit --
 *
 *	------------------------------------------------*
 *	Initializes SSL library once per application
 *	------------------------------------------------*
 *
 *	Side effects:
 *		initilizes SSL library
 *
 *	Result:
 *		none
 *
 *------------------------------------------------------*
 */
static int TlsLibInit (void) {
    static int initialized = 0;
static int TlsLibInit(int uninitialize) {
	static int initialized = 0;
    int i;
    char rnd_seed[16] = "GrzSlplKqUdnnzP!";	/* 16 bytes */
    int status=TCL_OK;
	int status = TCL_OK;
#if defined(OPENSSL_THREADS) && defined(TCL_THREADS)
	size_t num_locks;
#endif

	if (uninitialize) {
    if (initialized) {
        return status;
    }
    initialized = 1;
		if (!initialized) {
			dprintf("Asked to uninitialize, but we are not initialized");

			return(TCL_OK);
		}

		dprintf("Asked to uninitialize");

#if defined(OPENSSL_THREADS) && defined(TCL_THREADS)
		Tcl_MutexLock(&init_mx);
    size_t num_locks;

		CRYPTO_set_locking_callback(NULL);
		CRYPTO_set_id_callback(NULL);

    Tcl_MutexLock(&init_mx);
		if (locks) {
			free(locks);
			locks = NULL;
			locksCount = 0;
		}
#endif
		initialized = 0;

#if defined(OPENSSL_THREADS) && defined(TCL_THREADS)
	    if (CRYPTO_set_mem_functions((void *(*)(size_t))Tcl_Alloc,
					 (void *(*)(void *, size_t))Tcl_Realloc,
					 (void(*)(void *))Tcl_Free) == 0) {
	       /* Not using Tcl's mem functions ... not critical */
	    }
		Tcl_MutexUnlock(&init_mx);
#endif

		return(TCL_OK);
	}

	if (initialized) {
		dprintf("Called, but using cached value");
		return(status);
	}

	dprintf("Called");

#if defined(OPENSSL_THREADS) && defined(TCL_THREADS)
	Tcl_MutexLock(&init_mx);
#endif
	initialized = 1;
	    /* should we consider allocating mutexes? */
	    num_locks = CRYPTO_num_locks();
	    if (num_locks > CRYPTO_NUM_LOCKS) {

#if defined(OPENSSL_THREADS) && defined(TCL_THREADS)
	num_locks = CRYPTO_num_locks();
	locksCount = num_locks;
		status=TCL_ERROR;
		goto done;
	    }
	locks = malloc(sizeof(*locks) * num_locks);
	memset(locks, 0, sizeof(*locks) * num_locks);

	    CRYPTO_set_locking_callback(CryptoThreadLockCallback);
	    CRYPTO_set_id_callback(CryptoThreadIdCallback);
	CRYPTO_set_locking_callback(CryptoThreadLockCallback);
	CRYPTO_set_id_callback(CryptoThreadIdCallback);
#endif

	    if (SSL_library_init() != 1) {
	    	status=TCL_ERROR;
	if (SSL_library_init() != 1) {
		status = TCL_ERROR;
		goto done;
	    }
	    SSL_load_error_strings();
	    ERR_load_crypto_strings();
	}

	SSL_load_error_strings();
	ERR_load_crypto_strings();

	BIO_new_tcl(NULL, 0);

#if 0
	/*
	 * XXX:TODO: Remove this code and replace it with a check
	 * for enough entropy and do not try to create our own
	 * terrible entropy
	 */
	    /*
	     * Seed the random number generator in the SSL library,
	     * using the do/while construct because of the bug note in the
	     * OpenSSL FAQ at http://www.openssl.org/support/faq.html#USER1
	     *
	     * The crux of the problem is that Solaris 7 does not have a 
	     * /dev/random or /dev/urandom device so it cannot gather enough
	     * entropy from the RAND_seed() when TLS initializes and refuses
	     * to go further. Earlier versions of OpenSSL carried on regardless.
	     */
	    srand((unsigned int) time((time_t *) NULL));
	    do {
		for (i = 0; i < 16; i++) {
		    rnd_seed[i] = 1 + (char) (255.0 * rand()/(RAND_MAX+1.0));
		}
		RAND_seed(rnd_seed, sizeof(rnd_seed));
	    } while (RAND_status() != 1);
done:
    /*
     * Seed the random number generator in the SSL library,
     * using the do/while construct because of the bug note in the
     * OpenSSL FAQ at http://www.openssl.org/support/faq.html#USER1
     *
     * The crux of the problem is that Solaris 7 does not have a 
     * /dev/random or /dev/urandom device so it cannot gather enough
     * entropy from the RAND_seed() when TLS initializes and refuses
     * to go further. Earlier versions of OpenSSL carried on regardless.
     */
    srand((unsigned int) time((time_t *) NULL));
    do {
	for (i = 0; i < 16; i++) {
	    rnd_seed[i] = 1 + (char) (255.0 * rand()/(RAND_MAX+1.0));
	}
	RAND_seed(rnd_seed, sizeof(rnd_seed));
    } while (RAND_status() != 1);
#endif

done:
#if defined(OPENSSL_THREADS) && defined(TCL_THREADS)
	Tcl_MutexUnlock(&init_mx);
#endif

    return status;
	return(status);
}

 *	tclSSL (Colin McCormack, Shared Technology)
 *	SSLtcl (Peter Antman)
 *
 */
#ifndef _TLS_H
#define _TLS_H

#include <tcl.h>	/* Internal definitions for Tcl. */
#include <tcl.h>

#ifdef TCL_STORAGE_CLASS
# undef TCL_STORAGE_CLASS
#endif
#ifdef BUILD_tls
# define TCL_STORAGE_CLASS DLLEXPORT
#else
# define TCL_STORAGE_CLASS DLLIMPORT
#endif

/*
 * Forward declarations
 * Initialization routines -- our entire public C API.
 */

int Tls_Init(Tcl_Interp *interp);
EXTERN int Tls_Init _ANSI_ARGS_ ((Tcl_Interp *));
EXTERN int Tls_SafeInit _ANSI_ARGS_ ((Tcl_Interp *));
int Tls_SafeInit(Tcl_Interp *interp);

#endif /* _TLS_H */

/*
 * Copyright (C) 1997-2000 Matt Newman <[email protected]>
 *
 * Provides BIO layer to interface openssl to Tcl.
 */

#include "tlsInt.h"

#ifdef TCLTLS_OPENSSL_PRE_1_1_API
#define BIO_get_data(bio)                ((bio)->ptr)
#define BIO_get_init(bio)                ((bio)->init)
#define BIO_get_shutdown(bio)            ((bio)->shutdown)
#define BIO_set_data(bio, val)           (bio)->ptr = (val)
#define BIO_set_init(bio, val)           (bio)->init = (val)
#define BIO_set_shutdown(bio, val)       (bio)->shutdown = (val)

/* XXX: This assumes the variable being assigned to is BioMethods */
#define BIO_meth_new(type_, name_)       (BIO_METHOD *)Tcl_Alloc(sizeof(BIO_METHOD)); \
                                         memset(BioMethods, 0, sizeof(BIO_METHOD)); \
                                         BioMethods->type = type_; \
                                         BioMethods->name = name_;
#define BIO_meth_set_write(bio, val)     (bio)->bwrite = val;
#define BIO_meth_set_read(bio, val)      (bio)->bread = val;
#define BIO_meth_set_puts(bio, val)      (bio)->bputs = val;
#define BIO_meth_set_ctrl(bio, val)      (bio)->ctrl = val;
#define BIO_meth_set_create(bio, val)    (bio)->create = val;
#define BIO_meth_set_destroy(bio, val)   (bio)->destroy = val;
#endif

/*
 * Forward declarations
 */

static int BioWrite	_ANSI_ARGS_ ((BIO *h, CONST char *buf, int num));
static int BioRead	_ANSI_ARGS_ ((BIO *h, char *buf, int num));
static int BioPuts	_ANSI_ARGS_ ((BIO *h, CONST char *str));
static long BioCtrl	_ANSI_ARGS_ ((BIO *h, int cmd, long arg1, void *ptr));
static int BioNew	_ANSI_ARGS_ ((BIO *h));
static int BioFree	_ANSI_ARGS_ ((BIO *h));
static int BioWrite _ANSI_ARGS_((BIO *h, CONST char *buf, int num));
static int BioRead  _ANSI_ARGS_((BIO *h, char *buf, int num));
static int BioPuts  _ANSI_ARGS_((BIO *h, CONST char *str));
static long BioCtrl _ANSI_ARGS_((BIO *h, int cmd, long arg1, void *ptr));
static int BioNew   _ANSI_ARGS_((BIO *h));
static int BioFree  _ANSI_ARGS_((BIO *h));

BIO *BIO_new_tcl(State *statePtr, int flags) {
BIO *
BIO_new_tcl(statePtr, flags)
    State *statePtr;
    int flags;
{
    BIO *bio;
    static BIO_METHOD BioMethods = {
        .type = BIO_TYPE_TCL,
	BIO *bio;
	static BIO_METHOD *BioMethods = NULL;
#ifdef TCLTLS_SSL_USE_FASTPATH
	Tcl_Channel parentChannel;
	const Tcl_ChannelType *parentChannelType;
	void *parentChannelFdIn_p, *parentChannelFdOut_p;
	int parentChannelFdIn, parentChannelFdOut, parentChannelFd;
	int validParentChannelFd;
	int tclGetChannelHandleRet;
#endif

	dprintf("BIO_new_tcl() called");

	if (BioMethods == NULL) {
		BioMethods = BIO_meth_new(BIO_TYPE_TCL, "tcl");
	.name = "tcl",
        .bwrite = BioWrite,
        .bread = BioRead,
        .bputs = BioPuts,
        .ctrl = BioCtrl,
        .create = BioNew,
        .destroy = BioFree,
		BIO_meth_set_write(BioMethods, BioWrite);
		BIO_meth_set_read(BioMethods, BioRead);
		BIO_meth_set_puts(BioMethods, BioPuts);
		BIO_meth_set_ctrl(BioMethods, BioCtrl);
		BIO_meth_set_create(BioMethods, BioNew);
		BIO_meth_set_destroy(BioMethods, BioFree);
    };

    bio			= BIO_new(&BioMethods);
    bio->ptr		= (char*)statePtr;
    bio->init		= 1;
	}

	if (statePtr == NULL) {
		dprintf("Asked to setup a NULL state, just creating the initial configuration");

    bio->shutdown	= flags;
		return(NULL);
	}

#ifdef TCLTLS_SSL_USE_FASTPATH
	/*
	 * If the channel can be mapped back to a file descriptor, just use the file descriptor
	 * with the SSL library since it will likely be optimized for this.
	 */
	parentChannel = Tls_GetParent(statePtr, 0);
	parentChannelType = Tcl_GetChannelType(parentChannel);
    return bio;
}


	validParentChannelFd = 0;
	if (strcmp(parentChannelType->typeName, "tcp") == 0) {
		tclGetChannelHandleRet = Tcl_GetChannelHandle(parentChannel, TCL_READABLE, (ClientData) &parentChannelFdIn_p);
		if (tclGetChannelHandleRet == TCL_OK) {
			tclGetChannelHandleRet = Tcl_GetChannelHandle(parentChannel, TCL_WRITABLE, (ClientData) &parentChannelFdOut_p);
			if (tclGetChannelHandleRet == TCL_OK) {
				parentChannelFdIn = PTR2INT(parentChannelFdIn_p);
				parentChannelFdOut = PTR2INT(parentChannelFdOut_p);
				if (parentChannelFdIn == parentChannelFdOut) {
					parentChannelFd = parentChannelFdIn;
					validParentChannelFd = 1;
				}
			}
static int
BioWrite (bio, buf, bufLen)
    BIO *bio;
    CONST char *buf;
    int bufLen;
{
    Tcl_Channel chan = Tls_GetParent((State*)(bio->ptr));
    int ret;

		}
    dprintf("BioWrite(%p, <buf>, %d) [%p]",
	    (void *) bio, bufLen, (void *) chan);

    if (channelTypeVersion == TLS_CHANNEL_VERSION_2) {
	}

	ret = Tcl_WriteRaw(chan, buf, bufLen);
    } else {
	ret = Tcl_Write(chan, buf, bufLen);
    }
	if (validParentChannelFd) {
		dprintf("We found a shortcut, this channel is backed by a socket: %i", parentChannelFdIn);
		bio = BIO_new_socket(parentChannelFd, flags);
		statePtr->flags |= TLS_TCL_FASTPATH;
		return(bio);
	}

    dprintf("[%p] BioWrite(%d) -> %d [%d.%d]",
	dprintf("Falling back to Tcl I/O for this channel");
	    (void *) chan, bufLen, ret, Tcl_Eof(chan), Tcl_GetErrno());
#endif

    BIO_clear_flags(bio, BIO_FLAGS_WRITE|BIO_FLAGS_SHOULD_RETRY);

    if (ret == 0) {
	bio = BIO_new(BioMethods);
	BIO_set_data(bio, statePtr);
	BIO_set_shutdown(bio, flags);
	if (!Tcl_Eof(chan)) {
	    BIO_set_retry_write(bio);
	BIO_set_init(bio, 1);
	    ret = -1;
	}
    }

	return(bio);
}
    if (BIO_should_read(bio)) {
	BIO_set_retry_read(bio);
    }
    return ret;
}

static int BioWrite(BIO *bio, CONST char *buf, int bufLen) {
	Tcl_Channel chan;
	int ret;
	int tclEofChan, tclErrno;

	chan = Tls_GetParent((State *) BIO_get_data(bio), 0);

	dprintf("[chan=%p] BioWrite(%p, <buf>, %d)", (void *)chan, (void *) bio, bufLen);
static int
BioRead (bio, buf, bufLen)
    BIO *bio;
    char *buf;
    int bufLen;
{
    Tcl_Channel chan = Tls_GetParent((State*)bio->ptr);
    int ret = 0;
    int tclEofChan;

    dprintf("BioRead(%p, <buf>, %d) [%p]", (void *) bio, bufLen, (void *) chan);

	ret = Tcl_WriteRaw(chan, buf, bufLen);

	tclEofChan = Tcl_Eof(chan);
	tclErrno = Tcl_GetErrno();

	dprintf("[chan=%p] BioWrite(%d) -> %d [tclEof=%d; tclErrno=%d]", (void *) chan, bufLen, ret, tclEofChan, Tcl_GetErrno());

	BIO_clear_flags(bio, BIO_FLAGS_WRITE | BIO_FLAGS_SHOULD_RETRY);

	if (tclEofChan && ret <= 0) {
		dprintf("Got %i from Tcl_WriteRaw, and EOF is set; ret = -1", ret);
		Tcl_SetErrno(ECONNRESET);
		ret = -1;
	} else if (ret == 0) {
		dprintf("Got 0 from Tcl_WriteRaw, and EOF is not set; ret = 0");
		dprintf("Setting retry read flag");
		BIO_set_retry_read(bio);
	} else if (ret < 0) {
		dprintf("We got some kind of I/O error");

    if (buf == NULL) return 0;

    if (channelTypeVersion == TLS_CHANNEL_VERSION_2) {
	ret = Tcl_ReadRaw(chan, buf, bufLen);
    } else {
	ret = Tcl_Read(chan, buf, bufLen);
    }

		if (tclErrno == EAGAIN) {
			dprintf("It's EAGAIN");
			ret = 0;
		} else {
			dprintf("It's an unepxected error: %s/%i", Tcl_ErrnoMsg(tclErrno), tclErrno);
			Tcl_SetErrno(ECONNRESET);
			ret = -1;
		}
	} else {
    tclEofChan = Tcl_Eof(chan);

		dprintf("Successfully wrote some data");
    dprintf("[%p] BioRead(%d) -> %d [tclEof=%d; tclErrno=%d]",
	    (void *) chan, bufLen, ret, tclEofChan, Tcl_GetErrno());

	}
    BIO_clear_flags(bio, BIO_FLAGS_READ|BIO_FLAGS_SHOULD_RETRY);

    if (ret == 0) {
	if (!tclEofChan) {
            dprintf("Got 0 from Tcl_Read or Tcl_ReadRaw, and EOF is not set -- ret == -1 now");
	    BIO_set_retry_read(bio);
	if (ret != -1) {
		if (BIO_should_read(bio)) {
			dprintf("Setting should retry read flag");

			BIO_set_retry_read(bio);
	    ret = -1;
	} else {
            dprintf("Got 0 from Tcl_Read or Tcl_ReadRaw, and EOF is set");
        }
    } else {
		}
	}

        dprintf("Got non-zero from Tcl_Read or Tcl_ReadRaw == ret == %i", ret);
    }
    if (BIO_should_write(bio)) {
	BIO_set_retry_write(bio);
    }
	return(ret);
}

static int BioRead(BIO *bio, char *buf, int bufLen) {
	Tcl_Channel chan;
	int ret = 0;
	int tclEofChan, tclErrno;

	chan = Tls_GetParent((State *) BIO_get_data(bio), 0);

    dprintf("BioRead(%p, <buf>, %d) [%p] returning %i", (void *) bio, bufLen, (void *) chan, ret);
	dprintf("[chan=%p] BioRead(%p, <buf>, %d)", (void *) chan, (void *) bio, bufLen);

	if (buf == NULL) {
    return ret;
}
		return 0;
	}

	ret = Tcl_ReadRaw(chan, buf, bufLen);

static int
BioPuts	(bio, str)
    BIO *bio;
    CONST char *str;
{
	tclEofChan = Tcl_Eof(chan);
	tclErrno = Tcl_GetErrno();

    return BioWrite(bio, str, (int) strlen(str));
}
	dprintf("[chan=%p] BioRead(%d) -> %d [tclEof=%d; tclErrno=%d]", (void *) chan, bufLen, ret, tclEofChan, tclErrno);

	BIO_clear_flags(bio, BIO_FLAGS_READ | BIO_FLAGS_SHOULD_RETRY);

	if (tclEofChan && ret <= 0) {
static long
BioCtrl	(bio, cmd, num, ptr)
		dprintf("Got %i from Tcl_Read or Tcl_ReadRaw, and EOF is set; ret = -1", ret);
		Tcl_SetErrno(ECONNRESET);
    BIO *bio;
    int cmd;
    long num;
    void *ptr;
{
		ret = -1;
	} else if (ret == 0) {
		dprintf("Got 0 from Tcl_Read or Tcl_ReadRaw, and EOF is not set; ret = 0");
		dprintf("Setting retry read flag");
		BIO_set_retry_read(bio);
	} else if (ret < 0) {
		dprintf("We got some kind of I/O error");

    Tcl_Channel chan = Tls_GetParent((State*)bio->ptr);
    long ret = 1;
    int *ip;

    dprintf("BioCtrl(%p, 0x%x, 0x%x, %p)",
	    (void *) bio, (unsigned int) cmd, (unsigned int) num,
	    (void *) ptr);

    switch (cmd) {
    case BIO_CTRL_RESET:
	num = 0;
    case BIO_C_FILE_SEEK:
    case BIO_C_FILE_TELL:
	ret = 0;
	break;
    case BIO_CTRL_INFO:
	ret = 1;
	break;
		if (tclErrno == EAGAIN) {
			dprintf("It's EAGAIN");
			ret = 0;
		} else {
			dprintf("It's an unepxected error: %s/%i", Tcl_ErrnoMsg(tclErrno), tclErrno);
			Tcl_SetErrno(ECONNRESET);
			ret = -1;
		}
	} else {
		dprintf("Successfully read some data");
	}

	if (ret != -1) {
		if (BIO_should_write(bio)) {
			dprintf("Setting should retry write flag");

			BIO_set_retry_write(bio);
		}
	}

	dprintf("BioRead(%p, <buf>, %d) [%p] returning %i", (void *) bio, bufLen, (void *) chan, ret);

	return(ret);
}

static int BioPuts(BIO *bio, CONST char *str) {
	dprintf("BioPuts(%p, <string:%p>) called", bio, str);

	return BioWrite(bio, str, (int) strlen(str));
}

static long BioCtrl(BIO *bio, int cmd, long num, void *ptr) {
	Tcl_Channel chan;
	long ret = 1;

    case BIO_C_SET_FD:
	BioFree(bio);
	/* Sets State* */
	bio->ptr	= *((char **)ptr);
	bio->shutdown	= (int)num;
	bio->init	= 1;
	break;
    case BIO_C_GET_FD:
	if (bio->init) {
	chan = Tls_GetParent((State *) BIO_get_data(bio), 0);
	    ip = (int *)ptr;
	    if (ip != NULL) {
		*ip = bio->num;
	    }

	    ret = bio->num;
	} else {
	    ret = -1;
	}
	dprintf("BioCtrl(%p, 0x%x, 0x%x, %p)", (void *) bio, (unsigned int) cmd, (unsigned int) num, (void *) ptr);

	break;
    case BIO_CTRL_GET_CLOSE:
	ret = bio->shutdown;
	break;
    case BIO_CTRL_SET_CLOSE:
	bio->shutdown = (int)num;
	break;
    case BIO_CTRL_EOF:
	dprintf("BIO_CTRL_EOF");
	ret = Tcl_Eof(chan);
	break;
    case BIO_CTRL_PENDING:
	ret = (Tcl_InputBuffered(chan) ? 1 : 0);
	dprintf("BIO_CTRL_PENDING(%d)", (int) ret);
	break;
    case BIO_CTRL_WPENDING:
	ret = 0;
	break;
    case BIO_CTRL_DUP:
	break;
    case BIO_CTRL_FLUSH:
	dprintf("BIO_CTRL_FLUSH");
	switch (cmd) {
		case BIO_CTRL_RESET:
			dprintf("Got BIO_CTRL_RESET");
			num = 0;
		case BIO_C_FILE_SEEK:
			dprintf("Got BIO_C_FILE_SEEK");
		case BIO_C_FILE_TELL:
			dprintf("Got BIO_C_FILE_TELL");
			ret = 0;
			break;
		case BIO_CTRL_INFO:
			dprintf("Got BIO_CTRL_INFO");
			ret = 1;
			break;
		case BIO_C_SET_FD:
			dprintf("Unsupported call: BIO_C_SET_FD");
			ret = -1;
			break;
		case BIO_C_GET_FD:
			dprintf("Unsupported call: BIO_C_GET_FD");
			ret = -1;
			break;
		case BIO_CTRL_GET_CLOSE:
			dprintf("Got BIO_CTRL_CLOSE");
			ret = BIO_get_shutdown(bio);
			break;
		case BIO_CTRL_SET_CLOSE:
			dprintf("Got BIO_SET_CLOSE");
			BIO_set_shutdown(bio, num);
			break;
		case BIO_CTRL_EOF:
			dprintf("Got BIO_CTRL_EOF");
			ret = Tcl_Eof(chan);
			break;
		case BIO_CTRL_PENDING:
			dprintf("Got BIO_CTRL_PENDING");
			ret = ((chan) ? 1 : 0);
			dprintf("BIO_CTRL_PENDING(%d)", (int) ret);
			break;
		case BIO_CTRL_WPENDING:
			dprintf("Got BIO_CTRL_WPENDING");
			ret = 0;
			break;
		case BIO_CTRL_DUP:
			dprintf("Got BIO_CTRL_DUP");
			break;
		case BIO_CTRL_FLUSH:
			dprintf("Got BIO_CTRL_FLUSH");
	if (channelTypeVersion == TLS_CHANNEL_VERSION_2) {
	    ret = ((Tcl_WriteRaw(chan, "", 0) >= 0) ? 1 : -1);
			ret = ((Tcl_WriteRaw(chan, "", 0) >= 0) ? 1 : -1);
	} else {
	    ret = ((Tcl_Flush(chan) == TCL_OK) ? 1 : -1);
	}
	break;
    default:
	ret = 0;
	break;
    }
    return(ret);
			dprintf("BIO_CTRL_FLUSH returning value %li", ret);
			break;
		default:
			dprintf("Got unknown control command (%i)", cmd);
			ret = -2;
			break;
	}

	return(ret);
}

static int
BioNew	(bio)
static int BioNew(BIO *bio) {
	dprintf("BioNew(%p) called", bio);
    BIO *bio;
{
    bio->init	= 0;

	BIO_set_init(bio, 0);
    bio->num	= 0;
    bio->ptr	= NULL;
    bio->flags	= 0;
	BIO_set_data(bio, NULL);
	BIO_clear_flags(bio, -1);

    return 1;
	return(1);
}

static int
static int BioFree(BIO *bio) {
BioFree	(bio)
    BIO *bio;
{
    if (bio == NULL) {
	return 0;
    }
	if (bio == NULL) {
		return(0);
	}

	dprintf("BioFree(%p) called", bio);
    if (bio->shutdown) {
	if (bio->init) {
	    /*shutdown(bio->num, 2) */
	    /*closesocket(bio->num) */
	}
	bio->init	= 0;
	bio->flags	= 0;
	bio->num	= 0;
    }
    return 1;

	if (BIO_get_shutdown(bio)) {
		if (BIO_get_init(bio)) {
			/*shutdown(bio->num, 2) */
			/*closesocket(bio->num) */
		}

		BIO_set_init(bio, 0);
		BIO_clear_flags(bio, -1);
	}

	return(1);
}

 */

#include "tlsInt.h"

/*
 * Forward declarations
 */

static int	TlsBlockModeProc _ANSI_ARGS_((ClientData instanceData,
static int  TlsBlockModeProc _ANSI_ARGS_((ClientData instanceData, int mode));
			int mode));
static int	TlsCloseProc _ANSI_ARGS_ ((ClientData instanceData,
			Tcl_Interp *interp));
static int	TlsInputProc _ANSI_ARGS_((ClientData instanceData,
			char *buf, int bufSize, int *errorCodePtr));
static int  TlsCloseProc _ANSI_ARGS_((ClientData instanceData, Tcl_Interp *interp));
static int  TlsInputProc _ANSI_ARGS_((ClientData instanceData, char *buf, int bufSize, int *errorCodePtr));
static int	TlsOutputProc _ANSI_ARGS_((ClientData instanceData,
			CONST char *buf, int toWrite, int *errorCodePtr));
static int  TlsOutputProc _ANSI_ARGS_((ClientData instanceData, CONST char *buf, int toWrite, int *errorCodePtr));
static int	TlsGetOptionProc _ANSI_ARGS_ ((ClientData instanceData,
			Tcl_Interp *interp, CONST84 char *optionName,
static int  TlsGetOptionProc _ANSI_ARGS_((ClientData instanceData, Tcl_Interp *interp, CONST84 char *optionName, Tcl_DString *dsPtr));
			Tcl_DString *dsPtr));
static void	TlsWatchProc _ANSI_ARGS_((ClientData instanceData, int mask));
static void TlsWatchProc _ANSI_ARGS_((ClientData instanceData, int mask));
static int	TlsGetHandleProc _ANSI_ARGS_ ((ClientData instanceData,
			int direction, ClientData *handlePtr));
static int	TlsNotifyProc _ANSI_ARGS_ ((ClientData instanceData,
			int mask));
static void	TlsChannelHandler _ANSI_ARGS_ ((ClientData clientData,
			int mask));
static void	TlsChannelHandlerTimer _ANSI_ARGS_ ((ClientData clientData));
static int  TlsGetHandleProc _ANSI_ARGS_((ClientData instanceData, int direction, ClientData *handlePtr));
static int  TlsNotifyProc _ANSI_ARGS_((ClientData instanceData, int mask));
#if 0
static void TlsChannelHandler _ANSI_ARGS_((ClientData clientData, int mask));
#endif
static void TlsChannelHandlerTimer _ANSI_ARGS_((ClientData clientData));

/*
 * This structure describes the channel type structure for TCP socket
 * TLS Channel Type
 * based IO.  These are what the structures should look like, but we
 * have to build them up at runtime to be correct depending on whether
 * we are loaded into an 8.2.0-8.3.1 or 8.3.2+ Tcl interpreter.
 */
#ifdef TLS_STATIC_STRUCTURES_NOT_USED
static Tcl_ChannelType tlsChannelType2 = {
    "tls",		/* Type name. */
    TCL_CHANNEL_VERSION_2,	/* A v2 channel (8.3.2+) */
    TlsCloseProc,	/* Close proc. */
    TlsInputProc,	/* Input proc. */
    TlsOutputProc,	/* Output proc. */
    NULL,		/* Seek proc. */
    NULL,		/* Set option proc. */
    TlsGetOptionProc,	/* Get option proc. */
    TlsWatchProc,	/* Initialize notifier. */
    TlsGetHandleProc,	/* Get file handle out of channel. */
    NULL,		/* Close2Proc. */
    TlsBlockModeProc,	/* Set blocking/nonblocking mode.*/
    NULL,		/* FlushProc. */
    TlsNotifyProc,	/* handlerProc. */
};

static Tcl_ChannelType tlsChannelType1 = {
    "tls",		/* Type name. */
    TlsBlockModeProc,	/* Set blocking/nonblocking mode.*/
    TlsCloseProc,	/* Close proc. */
    TlsInputProc,	/* Input proc. */
    TlsOutputProc,	/* Output proc. */
    NULL,		/* Seek proc. */
    NULL,		/* Set option proc. */
    TlsGetOptionProc,	/* Get option proc. */
    TlsWatchProc,	/* Initialize notifier. */
    TlsGetHandleProc,	/* Get file handle out of channel. */
};
#else
static Tcl_ChannelType *tlsChannelType = NULL;
#endif

/*
 *-------------------------------------------------------------------
 *
 * Tls_ChannelType --
 *
 *	Return the correct TLS channel driver info
 *
 * Results:
 *	The correct channel driver for the current version of Tcl.
 *
 * Side effects:
 *	None.
 *
 *-------------------------------------------------------------------
 */
Tcl_ChannelType *Tls_ChannelType()
{
    /*
     * Initialize the channel type if necessary
     */
    if (tlsChannelType == NULL) {
	/*
	 * Allocation of a new channeltype structure is not easy, because of
	 * the various verson of the core and subsequent changes to the
	 * structure. The main challenge is to allocate enough memory for
	 * odern versions even if this extyension is compiled against one
	 * of the older variant!
	 *
	 * (1) Versions before stubs (8.0.x) are simple, because they are
	 *     supported only if the extension is compiled against exactly
	 *     that version of the core.
	 *
	 * (2) With stubs we just determine the difference between the older
	 *     and modern variant and overallocate accordingly if compiled
	 *     against an older variant.
	 */
Tcl_ChannelType *Tls_ChannelType(void) {
	unsigned int size;

	/*
	 * Initialize the channel type if necessary
	 */
	if (tlsChannelType == NULL) {
		/*
		 * Allocation of a new channeltype structure is not easy, because of
		 * the various verson of the core and subsequent changes to the
		 * structure. The main challenge is to allocate enough memory for
		 * modern versions even if this extsension is compiled against one
		 * of the older variant!
		 *
		 * (1) Versions before stubs (8.0.x) are simple, because they are
		 *     supported only if the extension is compiled against exactly
		 *     that version of the core.
		 *
		 * (2) With stubs we just determine the difference between the older
		 *     and modern variant and overallocate accordingly if compiled
		 *     against an older variant.
		 */

	unsigned int size = sizeof(Tcl_ChannelType); /* Base size */
		size = sizeof(Tcl_ChannelType); /* Base size */

	/*
	 * Size of a procedure pointer. We assume that all procedure
	 * pointers are of the same size, regardless of exact type
	 * (arguments and return values).
	 *
	 * 8.2.   First version containing close2proc. Baseline.
	 * 8.3.2  Three additional vectors. Moved blockMode, new flush- and
	 *        handlerProc's.
	 *
	 * => Compilation against earlier version has to overallocate three
	 *    procedure pointers.
	 */

#ifdef EMULATE_CHANNEL_VERSION_2
	size += 3 * procPtrSize;
#endif

	tlsChannelType = (Tcl_ChannelType *) ckalloc(size);
	memset((VOID *) tlsChannelType, 0, size);
		tlsChannelType = (Tcl_ChannelType *) ckalloc(size);
		memset((VOID *) tlsChannelType, 0, size);

	/*
	 * Common elements of the structure (no changes in location or name)
	 * close2Proc, seekProc, setOptionProc stay NULL.
	 */
		/*
		 * Common elements of the structure (no changes in location or name)
		 * close2Proc, seekProc, setOptionProc stay NULL.
		 */

	tlsChannelType->typeName	= "tls";
	tlsChannelType->closeProc	= TlsCloseProc;
	tlsChannelType->inputProc	= TlsInputProc;
	tlsChannelType->outputProc	= TlsOutputProc;
	tlsChannelType->getOptionProc	= TlsGetOptionProc;
	tlsChannelType->watchProc	= TlsWatchProc;
	tlsChannelType->getHandleProc	= TlsGetHandleProc;
		tlsChannelType->typeName	= "tls";
		tlsChannelType->closeProc	= TlsCloseProc;
		tlsChannelType->inputProc	= TlsInputProc;
		tlsChannelType->outputProc	= TlsOutputProc;
		tlsChannelType->getOptionProc	= TlsGetOptionProc;
		tlsChannelType->watchProc	= TlsWatchProc;
		tlsChannelType->getHandleProc	= TlsGetHandleProc;

	/*
		/*
	 * blockModeProc is a twister.  We have to make some runtime-choices,
	 * depending on the version we compiled against.
	 */

#ifdef EMULATE_CHANNEL_VERSION_2
	/*
	 * We are compiling against an 8.3.1- core.  We have to create some
	 * definitions for the new elements as the compiler does not know them
	 * by name.
	 */

	if (channelTypeVersion == TLS_CHANNEL_VERSION_1) {
	    /*
	     * The 'version' element of 8.3.2 is in the the place of the
	     * blockModeProc. For 8.2.0-8.3.1 we have to set our blockModeProc
	     * into this place.
	     */
	    tlsChannelType->blockModeProc = TlsBlockModeProc;
	} else /* channelTypeVersion == TLS_CHANNEL_VERSION_2 */ {
	    /*
	     * For the 8.3.2 core we present ourselves as a version 2
	     * driver. This means a special value in version (ex
	     * blockModeProc), blockModeProc in a different place and of
	     * course usage of the handlerProc.  The last two have to
	     * referenced with pointer magic because they aren't defined
	     * otherwise.
	     */

	    tlsChannelType->blockModeProc =
		(Tcl_DriverBlockModeProc*) TLS_CHANNEL_VERSION_2;
	    (*((Tcl_DriverBlockModeProc**)(&(tlsChannelType->close2Proc)+1)))
		= TlsBlockModeProc;
	    (*((TlsDriverHandlerProc**)(&(tlsChannelType->close2Proc)+3)))
		= TlsNotifyProc;
	}
#else
	/*
	 * Compiled against 8.3.2+. Direct access to all elements possible. Use
	 * channelTypeVersion information to select the values to use.
	 */
		 * Compiled against 8.3.2+. Direct access to all elements possible. Use
		 * channelTypeVersion information to select the values to use.
		 */

	if (channelTypeVersion == TLS_CHANNEL_VERSION_1) {
	    /*
		/*
	     * The 'version' element of 8.3.2 is in the the place of the
	     * blockModeProc. For the original patch in 8.1.x and the firstly
	     * included (8.2) we have to set our blockModeProc into this
	     * place.
	     */
	    tlsChannelType->version = (Tcl_ChannelTypeVersion)TlsBlockModeProc;
	} else /* channelTypeVersion == TLS_CHANNEL_VERSION_2 */ {
	    /*
	     * For the 8.3.2 core we present ourselves as a version 2
	     * driver. This means a special value in version (ex
	     * blockModeProc), blockModeProc in a different place and of
	     * course usage of the handlerProc.
	     */
		 * For the 8.3.2 core we present ourselves as a version 2
		 * driver. This means a special value in version (ex
		 * blockModeProc), blockModeProc in a different place and of
		 * course usage of the handlerProc.
		 */

	    tlsChannelType->version       = TCL_CHANNEL_VERSION_2;
	    tlsChannelType->blockModeProc = TlsBlockModeProc;
	    tlsChannelType->handlerProc   = TlsNotifyProc;
		tlsChannelType->version       = TCL_CHANNEL_VERSION_2;
		tlsChannelType->blockModeProc = TlsBlockModeProc;
		tlsChannelType->handlerProc   = TlsNotifyProc;
	}
#endif
    }
    return tlsChannelType;

	return(tlsChannelType);
}


/*
 *-------------------------------------------------------------------
 *
 * TlsBlockModeProc --
 *
 *	This procedure is invoked by the generic IO level
 *       to set blocking and nonblocking modes
 * Results:
 *	0 if successful, errno when failed.
 *
 * Side effects:
 *	Sets the device into blocking or nonblocking mode.
 *
 *-------------------------------------------------------------------
 */

static int
TlsBlockModeProc(ClientData instanceData,	/* Socket state. */
static int TlsBlockModeProc(ClientData instanceData, int mode) {
                 int mode)			/* The mode to set. Can be one of
						* TCL_MODE_BLOCKING or
						* TCL_MODE_NONBLOCKING. */
{
    State *statePtr = (State *) instanceData;
	State *statePtr = (State *) instanceData;

    if (mode == TCL_MODE_NONBLOCKING) {
	statePtr->flags |= TLS_TCL_ASYNC;
    } else {
	statePtr->flags &= ~(TLS_TCL_ASYNC);
    }
    if (channelTypeVersion == TLS_CHANNEL_VERSION_2) {
	return 0;
	if (mode == TCL_MODE_NONBLOCKING) {
		statePtr->flags |= TLS_TCL_ASYNC;
	} else {
		statePtr->flags &= ~(TLS_TCL_ASYNC);
	}

	return(0);
    } else {
	return Tcl_SetChannelOption(statePtr->interp, Tls_GetParent(statePtr),
		"-blocking", (mode == TCL_MODE_NONBLOCKING) ? "0" : "1");
    }
}
}


/*
 *-------------------------------------------------------------------
 *
 * TlsCloseProc --
 *
 *	This procedure is invoked by the generic IO level to perform
 *	channel-type-specific cleanup when a SSL socket based channel
 *	is closed.
 *
 *	Note: we leave the underlying socket alone, is this right?
 *
 * Results:
 *	0 if successful, the value of Tcl_GetErrno() if failed.
 *
 * Side effects:
 *	Closes the socket of the channel.
 *
 *-------------------------------------------------------------------
 */
static int
TlsCloseProc(ClientData instanceData,	/* The socket to close. */
static int TlsCloseProc(ClientData instanceData, Tcl_Interp *interp) {
             Tcl_Interp *interp)	/* For error reporting - unused. */
{
    State *statePtr = (State *) instanceData;
	State *statePtr = (State *) instanceData;

    dprintf("TlsCloseProc(%p)", (void *) statePtr);
	dprintf("TlsCloseProc(%p)", (void *) statePtr);

    if (channelTypeVersion == TLS_CHANNEL_VERSION_1) {
	/*
	 * Remove event handler to underlying channel, this could
	 * be because we are closing for real, or being "unstacked".
	 */
	Tls_Clean(statePtr);
	Tcl_EventuallyFree((ClientData)statePtr, Tls_Free);

	Tcl_DeleteChannelHandler(Tls_GetParent(statePtr),
		TlsChannelHandler, (ClientData) statePtr);
    }
	dprintf("Returning TCL_OK");

	return(TCL_OK);

	/* Interp is unused. */
    Tls_Clean(statePtr);
	interp = interp;
    Tcl_EventuallyFree((ClientData)statePtr, Tls_Free);
    return TCL_OK;
}


/*
 *-------------------------------------------------------------------
 *
 * TlsInputProc --
 *
 *	This procedure is invoked by the generic IO level
 *       to read input from a SSL socket based channel.
 *
 * Results:
 *	The number of bytes read is returned or -1 on error. An output
 *	argument contains the POSIX error code on error, or zero if no
 *	error occurred.
 *
 * Side effects:
 *	Reads input from the input device of the channel.
 *
 *-------------------------------------------------------------------
 */

static int
TlsInputProc(ClientData instanceData,	/* Socket state. */
static int TlsInputProc(ClientData instanceData, char *buf, int bufSize, int *errorCodePtr) {
	char *buf,			/* Where to store data read. */
	int bufSize,			/* How much space is available
					 * in the buffer? */
	int *errorCodePtr)		/* Where to store error code. */
{
    State *statePtr = (State *) instanceData;
    int bytesRead;			/* How many bytes were read? */
	State *statePtr = (State *) instanceData;
	int bytesRead;
	int tlsConnect;
	int err;

    *errorCodePtr = 0;
	*errorCodePtr = 0;

    dprintf("BIO_read(%d)", bufSize);
	dprintf("BIO_read(%d)", bufSize);

    if (statePtr->flags & TLS_TCL_CALLBACK) {
       /* don't process any bytes while verify callback is running */
       dprintf("Callback is running, reading 0 bytes");

	if (statePtr->flags & TLS_TCL_CALLBACK) {
		/* don't process any bytes while verify callback is running */
		dprintf("Callback is running, reading 0 bytes");
		return(0);
       bytesRead = 0;
       goto input;
    }
	}

    if (!SSL_is_init_finished(statePtr->ssl)) {
	bytesRead = Tls_WaitForConnect(statePtr, errorCodePtr);
	if (bytesRead <= 0) {
            dprintf("Got an error (bytesRead = %i)", bytesRead);
	dprintf("Calling Tls_WaitForConnect");
	tlsConnect = Tls_WaitForConnect(statePtr, errorCodePtr);
	if (tlsConnect < 0) {
		dprintf("Got an error (bytesRead = %i)", bytesRead);

	    if (*errorCodePtr == ECONNRESET) {
                dprintf("Got connection reset");
		/* Soft EOF */
		*errorCodePtr = 0;
		bytesRead = 0;
	    }
		if (*errorCodePtr == ECONNRESET) {
			dprintf("Got connection reset");
			/* Soft EOF */
			*errorCodePtr = 0;
			bytesRead = 0;
		}
	    goto input;
	}
    }

		return(0);
	}

    if (statePtr->flags & TLS_TCL_INIT) {
	statePtr->flags &= ~(TLS_TCL_INIT);
    }
    /*
     * We need to clear the SSL error stack now because we sometimes reach
     * this function with leftover errors in the stack.  If BIO_read
     * returns -1 and intends EAGAIN, there is a leftover error, it will be
     * misconstrued as an error, not EAGAIN.
     *
     * Alternatively, we may want to handle the <0 return codes from
     * BIO_read specially (as advised in the RSA docs).  TLS's lower level BIO
     * functions play with the retry flags though, and this seems to work
     * correctly.  Similar fix in TlsOutputProc. - hobbs
     */
    ERR_clear_error();
    bytesRead = BIO_read(statePtr->bio, buf, bufSize);
    dprintf("BIO_read -> %d", bytesRead);
	if (statePtr->flags & TLS_TCL_INIT) {
		statePtr->flags &= ~(TLS_TCL_INIT);
	}

	/*
	 * We need to clear the SSL error stack now because we sometimes reach
	 * this function with leftover errors in the stack.  If BIO_read
	 * returns -1 and intends EAGAIN, there is a leftover error, it will be
	 * misconstrued as an error, not EAGAIN.
	 *
	 * Alternatively, we may want to handle the <0 return codes from
	 * BIO_read specially (as advised in the RSA docs).  TLS's lower level BIO
	 * functions play with the retry flags though, and this seems to work
	 * correctly.  Similar fix in TlsOutputProc. - hobbs
	 */
	ERR_clear_error();
	bytesRead = BIO_read(statePtr->bio, buf, bufSize);
	dprintf("BIO_read -> %d", bytesRead);

    if (bytesRead < 0) {
	int err = SSL_get_error(statePtr->ssl, bytesRead);
	err = SSL_get_error(statePtr->ssl, bytesRead);

	if (err == SSL_ERROR_SSL) {
	    Tls_Error(statePtr, SSL_ERROR(statePtr->ssl, bytesRead));
	    *errorCodePtr = ECONNABORTED;
	} else if (BIO_should_retry(statePtr->bio)) {
	    dprintf("RE! ");
	    *errorCodePtr = EAGAIN;
	} else {
	    *errorCodePtr = Tcl_GetErrno();
	    if (*errorCodePtr == ECONNRESET) {
	if (BIO_should_retry(statePtr->bio)) {
		dprintf("I/O failed, will retry based on EAGAIN");
		*errorCodePtr = EAGAIN;
	}

	switch (err) {
		case SSL_ERROR_NONE:
			dprintBuffer(buf, bytesRead);
			break;
		case SSL_ERROR_SSL:
			Tls_Error(statePtr, TCLTLS_SSL_ERROR(statePtr->ssl, bytesRead));
			*errorCodePtr = ECONNABORTED;
			break;
		case SSL_ERROR_SYSCALL:
			dprintf("I/O error reading, treating it as EOF");
		/* Soft EOF */
		*errorCodePtr = 0;
		bytesRead = 0;
	    }
	}
			*errorCodePtr = 0;
			bytesRead = 0;
			break;
	}

    }
    input:
    dprintf("Input(%d) -> %d [%d]", bufSize, bytesRead, *errorCodePtr);
    return bytesRead;
	dprintf("Input(%d) -> %d [%d]", bufSize, bytesRead, *errorCodePtr);
	return(bytesRead);
}


/*
 *-------------------------------------------------------------------
 *
 * TlsOutputProc --
 *
 *	This procedure is invoked by the generic IO level
 *       to write output to a SSL socket based channel.
 *
 * Results:
 *	The number of bytes written is returned. An output argument is
 *	set to a POSIX error code if an error occurred, or zero.
 *
 * Side effects:
 *	Writes output on the output device of the channel.
 *
 *-------------------------------------------------------------------
 */

static int
TlsOutputProc(ClientData instanceData,	/* Socket state. */
static int TlsOutputProc(ClientData instanceData, CONST char *buf, int toWrite, int *errorCodePtr) {
              CONST char *buf,		/* The data buffer. */
              int toWrite,		/* How many bytes to write? */
              int *errorCodePtr)	/* Where to store error code. */
{
    State *statePtr = (State *) instanceData;
    int written, err;
	State *statePtr = (State *) instanceData;
	int written, err;

    *errorCodePtr = 0;
	*errorCodePtr = 0;

    dprintf("BIO_write(%p, %d)", (void *) statePtr, toWrite);
	dprintf("BIO_write(%p, %d)", (void *) statePtr, toWrite);
	dprintBuffer(buf, toWrite);

    if (statePtr->flags & TLS_TCL_CALLBACK) {
       /* don't process any bytes while verify callback is running */
       written = -1;
       *errorCodePtr = EAGAIN;
	if (statePtr->flags & TLS_TCL_CALLBACK) {
		dprintf("Don't process output while callbacks are running")
		written = -1;
		*errorCodePtr = EAGAIN;
       goto output;
    }
		return(-1);
	}

    if (!SSL_is_init_finished(statePtr->ssl)) {
	dprintf("Calling Tls_WaitForConnect");
	written = Tls_WaitForConnect(statePtr, errorCodePtr);
	if (written <= 0) {
            dprintf("Tls_WaitForConnect returned %i (err = %i)", written, *errorCodePtr);
	if (written < 0) {
		dprintf("Tls_WaitForConnect returned %i (err = %i)", written, *errorCodePtr);

	    goto output;
		return(-1);
	}
    }

    if (statePtr->flags & TLS_TCL_INIT) {
	statePtr->flags &= ~(TLS_TCL_INIT);
    }
    if (toWrite == 0) {
	dprintf("zero-write");
	BIO_flush(statePtr->bio);
	written = 0;
	goto output;
    } else {
	if (toWrite == 0) {
		dprintf("zero-write");
		err = BIO_flush(statePtr->bio);

		if (err <= 0) {
			dprintf("Flushing failed");

			*errorCodePtr = EIO;
			written = 0;
			return(-1);
		}

		written = 0;
		*errorCodePtr = 0;
		return(0);
	}

	/*
	 * We need to clear the SSL error stack now because we sometimes reach
	 * this function with leftover errors in the stack.  If BIO_write
	 * returns -1 and intends EAGAIN, there is a leftover error, it will be
	 * misconstrued as an error, not EAGAIN.
	 *
	 * Alternatively, we may want to handle the <0 return codes from
	 * BIO_write specially (as advised in the RSA docs).  TLS's lower level
	 * BIO functions play with the retry flags though, and this seems to
	 * work correctly.  Similar fix in TlsInputProc. - hobbs
	 */
	ERR_clear_error();
	written = BIO_write(statePtr->bio, buf, toWrite);
	dprintf("BIO_write(%p, %d) -> [%d]",
	dprintf("BIO_write(%p, %d) -> [%d]", (void *) statePtr, toWrite, written);
		(void *) statePtr, toWrite, written);
    }

    if (written <= 0) {
	switch ((err = SSL_get_error(statePtr->ssl, written))) {
	    case SSL_ERROR_NONE:
		if (written < 0) {
		    written = 0;
		}
		break;
	    case SSL_ERROR_WANT_WRITE:
		dprintf(" write W BLOCK");
		break;
	    case SSL_ERROR_WANT_READ:
		dprintf(" write R BLOCK");
		break;
	    case SSL_ERROR_WANT_X509_LOOKUP:
		dprintf(" write X BLOCK");
		break;
	    case SSL_ERROR_ZERO_RETURN:
		dprintf(" closed");
		written = 0;
		break;
	    case SSL_ERROR_SYSCALL:
		*errorCodePtr = Tcl_GetErrno();
		dprintf(" [%d] syscall errr: %d",
	err = SSL_get_error(statePtr->ssl, written);
	switch (err) {
		case SSL_ERROR_NONE:
			if (written < 0) {
				written = 0;
			}
			break;
		case SSL_ERROR_WANT_WRITE:
			dprintf(" write W BLOCK");
			break;
		case SSL_ERROR_WANT_READ:
			dprintf(" write R BLOCK");
			break;
		case SSL_ERROR_WANT_X509_LOOKUP:
			dprintf(" write X BLOCK");
			break;
		case SSL_ERROR_ZERO_RETURN:
			dprintf(" closed");
			written = 0;
			break;
		case SSL_ERROR_SYSCALL:
			*errorCodePtr = Tcl_GetErrno();
			dprintf(" [%d] syscall errr: %d", written, *errorCodePtr);
			written, *errorCodePtr);
		written = -1;
		break;
	    case SSL_ERROR_SSL:
		Tls_Error(statePtr, SSL_ERROR(statePtr->ssl, written));
		*errorCodePtr = ECONNABORTED;
		written = -1;
		break;
	    default:
		dprintf(" unknown err: %d", err);
		break;
			written = -1;
			break;
		case SSL_ERROR_SSL:
			Tls_Error(statePtr, TCLTLS_SSL_ERROR(statePtr->ssl, written));
			*errorCodePtr = ECONNABORTED;
			written = -1;
			break;
		default:
			dprintf(" unknown err: %d", err);
			break;
	}
    }

    output:
    dprintf("Output(%d) -> %d", toWrite, written);
    return written;
	dprintf("Output(%d) -> %d", toWrite, written);
	return(written);
}


/*
 *-------------------------------------------------------------------
 *
 * TlsGetOptionProc --
 *
 *	Computes an option value for a SSL socket based channel, or a
 *	list of all options and their values.

					 * NULL to get all options and
					 * their values. */
	Tcl_DString *dsPtr)		/* Where to store the computed value
					 * initialized by caller. */
{
    State *statePtr = (State *) instanceData;

    if (channelTypeVersion == TLS_CHANNEL_VERSION_2) {
	Tcl_Channel downChan = Tls_GetParent(statePtr);
	Tcl_DriverGetOptionProc *getOptionProc;
   Tcl_Channel downChan = Tls_GetParent(statePtr, TLS_TCL_FASTPATH);
   Tcl_DriverGetOptionProc *getOptionProc;

	getOptionProc = Tcl_ChannelGetOptionProc(Tcl_GetChannelType(downChan));
	if (getOptionProc != NULL) {
	    return (*getOptionProc)(Tcl_GetChannelInstanceData(downChan),
    getOptionProc = Tcl_ChannelGetOptionProc(Tcl_GetChannelType(downChan));
    if (getOptionProc != NULL) {
        return (*getOptionProc)(Tcl_GetChannelInstanceData(downChan), interp, optionName, dsPtr);
		    interp, optionName, dsPtr);
	} else if (optionName == (char*) NULL) {
	    /*
	     * Request is query for all options, this is ok.
	     */
	    return TCL_OK;
	}
	/*
	 * Request for a specific option has to fail, we don't have any.
	 */
	return TCL_ERROR;
    } else if (optionName == (char*) NULL) {
        /*
         * Request is query for all options, this is ok.
         */
         return TCL_OK;
    }
    /*
     * Request for a specific option has to fail, we don't have any.
     */
    return TCL_ERROR;
    } else {
#if 0
	size_t len = 0;

}
	if (optionName != (char *) NULL) {
	    len = strlen(optionName);
	}

	if ((len == 0) || ((len > 1) && (optionName[1] == 'c') &&
		(strncmp(optionName, "-cipher", len) == 0))) {
	    if (len == 0) {
		Tcl_DStringAppendElement(dsPtr, "-cipher");
	    }
	    Tcl_DStringAppendElement(dsPtr, SSL_get_cipher(statePtr->ssl));
	    if (len) {
		return TCL_OK;
	    }
	}
#endif
	return TCL_OK;
    }
}

/*
 *-------------------------------------------------------------------
 *
 * TlsWatchProc --
 *
 *	Initialize the notifier to watch Tcl_Files from this channel.
 *

static void
TlsWatchProc(ClientData instanceData,	/* The socket state. */
             int mask)			/* Events of interest; an OR-ed
                                         * combination of TCL_READABLE,
                                         * TCL_WRITABLE and TCL_EXCEPTION. */
{
    Tcl_Channel     downChan;
    State *statePtr = (State *) instanceData;

    dprintf("TlsWatchProc(0x%x)", mask);

    /* Pretend to be dead as long as the verify callback is running. 
     * Otherwise that callback could be invoked recursively. */
    if (statePtr->flags & TLS_TCL_CALLBACK) { return; }

    if (channelTypeVersion == TLS_CHANNEL_VERSION_2) {
	Tcl_Channel     downChan;
    if (statePtr->flags & TLS_TCL_CALLBACK) {
        dprintf("Callback is on-going, doing nothing");
        return;
    }

    dprintFlags(statePtr);

    downChan = Tls_GetParent(statePtr, TLS_TCL_FASTPATH);

    if (statePtr->flags & TLS_TCL_HANDSHAKE_FAILED) {
        dprintf("Asked to watch a socket with a failed handshake -- nothing can happen here");

	dprintf("Unregistering interest in the lower channel");
	(Tcl_GetChannelType(downChan))->watchProc(Tcl_GetChannelInstanceData(downChan), 0);

	statePtr->watchMask = 0;

        return;
    }

	statePtr->watchMask = mask;

	/* No channel handlers any more. We will be notified automatically
	 * about events on the channel below via a call to our
	 * 'TransformNotifyProc'. But we have to pass the interest down now.
	 * We are allowed to add additional 'interest' to the mask if we want
	 * to. But this transformation has no such interest. It just passes
	 * the request down, unchanged.
	 */

	downChan = Tls_GetParent(statePtr);

        dprintf("Registering our interest in the lower channel (chan=%p)", (void *) downChan);
	(Tcl_GetChannelType(downChan))
	    ->watchProc(Tcl_GetChannelInstanceData(downChan), mask);

	/*
	 * Management of the internal timer.
	 */

	if (statePtr->timer != (Tcl_TimerToken) NULL) {
            dprintf("A timer was found, deleting it");
	    Tcl_DeleteTimerHandler(statePtr->timer);
	    statePtr->timer = (Tcl_TimerToken) NULL;
	}

	if ((mask & TCL_READABLE) && Tcl_InputBuffered(statePtr->self) > 0) {
	    /*
	     * There is interest in readable events and we actually have
	     * data waiting, so generate a timer to flush that.
	     */
            dprintf("Creating a new timer since data appears to be waiting");
	    statePtr->timer = Tcl_CreateTimerHandler(TLS_TCL_DELAY,
		    TlsChannelHandlerTimer, (ClientData) statePtr);
	}
    } else {
	if (mask == statePtr->watchMask)
	    return;

}
	if (statePtr->watchMask) {
	    /*
	     * Remove event handler to underlying channel, this could
	     * be because we are closing for real, or being "unstacked".
	     */

	    Tcl_DeleteChannelHandler(Tls_GetParent(statePtr),
		    TlsChannelHandler, (ClientData) statePtr);
	}
	statePtr->watchMask = mask;
	if (statePtr->watchMask) {
	    /*
	     * Setup active monitor for events on underlying Channel.
	     */

	    Tcl_CreateChannelHandler(Tls_GetParent(statePtr),
		    statePtr->watchMask, TlsChannelHandler,
		    (ClientData) statePtr);
	}
    }
}

/*
 *-------------------------------------------------------------------
 *
 * TlsGetHandleProc --
 *
 *	Called from Tcl_GetChannelFile to retrieve o/s file handler
 *	from the SSL socket based channel.
 *
 * Results:
 *	The appropriate Tcl_File or NULL if not present. 
 *
 * Side effects:
 *	None.
 *
 *-------------------------------------------------------------------
 */
static int
TlsGetHandleProc(ClientData instanceData,	/* The socket state. */
static int TlsGetHandleProc(ClientData instanceData, int direction, ClientData *handlePtr) {
                 int direction,		/* Which Tcl_File to retrieve? */
                 ClientData *handlePtr)	/* Where to store the handle.  */
{
    State *statePtr = (State *) instanceData;
	State *statePtr = (State *) instanceData;

    return Tcl_GetChannelHandle(Tls_GetParent(statePtr), direction, handlePtr);
	return(Tcl_GetChannelHandle(Tls_GetParent(statePtr, TLS_TCL_FASTPATH), direction, handlePtr));
}


/*
 *-------------------------------------------------------------------
 *
 * TlsNotifyProc --
 *
 *	Handler called by Tcl to inform us of activity
 *	on the underlying channel.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	May process the incoming event by itself.
 *
 *-------------------------------------------------------------------
 */

static int
static int TlsNotifyProc(ClientData instanceData, int mask) {
TlsNotifyProc(instanceData, mask)
    ClientData	   instanceData; /* The state of the notified transformation */
    int		   mask;       /* The mask of occuring events */
{
    State *statePtr = (State *) instanceData;
	State *statePtr = (State *) instanceData;
	int errorCode;

    /*
     * An event occured in the underlying channel.  This
     * transformation doesn't process such events thus returns the
     * incoming mask unchanged.
     */
	/*
	 * An event occured in the underlying channel.  This
	 * transformation doesn't process such events thus returns the
	 * incoming mask unchanged.
	 */

    if (statePtr->timer != (Tcl_TimerToken) NULL) {
	/*
	 * Delete an existing timer. It was not fired, yet we are
	 * here, so the channel below generated such an event and we
	 * don't have to. The renewal of the interest after the
	 * execution of channel handlers will eventually cause us to
	 * recreate the timer (in WatchProc).
	 */
	if (statePtr->timer != (Tcl_TimerToken) NULL) {
		/*
		 * Delete an existing timer. It was not fired, yet we are
		 * here, so the channel below generated such an event and we
		 * don't have to. The renewal of the interest after the
		 * execution of channel handlers will eventually cause us to
		 * recreate the timer (in WatchProc).
		 */

	Tcl_DeleteTimerHandler(statePtr->timer);
	statePtr->timer = (Tcl_TimerToken) NULL;
    }
		Tcl_DeleteTimerHandler(statePtr->timer);
		statePtr->timer = (Tcl_TimerToken) NULL;
	}

    if (statePtr->flags & TLS_TCL_CALLBACK) {
	return 0;
    }
	if (statePtr->flags & TLS_TCL_CALLBACK) {
		dprintf("Returning 0 due to callback");
		return 0;
	}

    if (statePtr->flags & TLS_TCL_INIT
	dprintf("Calling Tls_WaitForConnect");
	    && !SSL_is_init_finished(statePtr->ssl)) {
	int errorCode = 0;
	if (Tls_WaitForConnect(statePtr, &errorCode) <= 0 && errorCode == EAGAIN) {
            dprintf("Async flag could be set (didn't check) and errorCode == EAGAIN");
	    return 0;
	}
    }

    return mask;
	errorCode = 0;
	if (Tls_WaitForConnect(statePtr, &errorCode) < 0) {
		if (errorCode == EAGAIN) {
			dprintf("Async flag could be set (didn't check) and errorCode == EAGAIN:  Returning 0");

			return 0;
		}

		dprintf("Tls_WaitForConnect returned an error");
	}

	dprintf("Returning %i", mask);

	return(mask);
}


#if 0
/*
 *------------------------------------------------------*
 *
 *      TlsChannelHandler --
 *
 *      ------------------------------------------------*
 *      Handler called by Tcl as a result of

	 * Data is waiting, flush it out in short time
	 */
	statePtr->timer = Tcl_CreateTimerHandler(TLS_TCL_DELAY,
		TlsChannelHandlerTimer, (ClientData) statePtr);
    }
    Tcl_Release( (ClientData)statePtr);
}
#endif


/*
 *------------------------------------------------------*
 *
 *	TlsChannelHandlerTimer --
 *
 *	------------------------------------------------*
 *	Called by the notifier (-> timer) to flush out
 *	information waiting in channel buffers.
 *	------------------------------------------------*
 *
 *	Sideeffects:
 *		As of 'TlsChannelHandler'.
 *
 *	Result:
 *		None.
 *
 *------------------------------------------------------*
 */

static void
TlsChannelHandlerTimer (clientData)
static void TlsChannelHandlerTimer(ClientData clientData) {
ClientData clientData; /* Transformation to query */
{
    State *statePtr = (State *) clientData;
    int mask = 0;
	State *statePtr = (State *) clientData;
	int mask = 0;

	dprintf("Called");

    statePtr->timer = (Tcl_TimerToken) NULL;
	statePtr->timer = (Tcl_TimerToken) NULL;

    if (BIO_wpending(statePtr->bio)) {
	mask |= TCL_WRITABLE;
    }
    if (BIO_pending(statePtr->bio)) {
	mask |= TCL_READABLE;
    }
    Tcl_NotifyChannel(statePtr->self, mask);
}

	if (BIO_wpending(statePtr->bio)) {
		dprintf("[chan=%p] BIO writable", statePtr->self);

		mask |= TCL_WRITABLE;
	}

	if (BIO_pending(statePtr->bio)) {
		dprintf("[chan=%p] BIO readable", statePtr->self);

		mask |= TCL_READABLE;
	}

	dprintf("Notifying ourselves");
	Tcl_NotifyChannel(statePtr->self, mask);

	dprintf("Returning");

	return;
}

/*
 *------------------------------------------------------*
 *
 *	Tls_WaitForConnect --
 *
 *	Sideeffects:
 *		Issues SSL_accept or SSL_connect
 *
 *	Result:
 *		None.
 *
 *------------------------------------------------------*
 */
int Tls_WaitForConnect(State *statePtr, int *errorCodePtr) {
	unsigned long backingError;
int
Tls_WaitForConnect( statePtr, errorCodePtr)
    State *statePtr;
    int *errorCodePtr;		/* Where to store error code. */
{
    int err;

	int err, rc;
	int bioShouldRetry;

	dprintf("WaitForConnect(%p)", (void *) statePtr);
	dprintFlags(statePtr);

	if (!(statePtr->flags & TLS_TCL_INIT)) {
		dprintf("Tls_WaitForConnect called on already initialized channel -- returning with immediate success");
		*errorCodePtr = 0;
		return(0);
	}
    dprintf("WaitForConnect(%p)", (void *) statePtr);

    if (statePtr->flags & TLS_TCL_HANDSHAKE_FAILED) {
        /*
         * We choose ECONNRESET over ECONNABORTED here because some server
         * side code, on the wiki for example, sets up a read handler that
         * does a read and if eof closes the channel. There is no catch/try
         * around the reads so exceptions will result in potentially many
         * dangling channels hanging around that should have been closed.
         * (Backgroun: ECONNABORTED maps to a Tcl exception and 
         * ECONNRESET maps to graceful EOF).
         */
        *errorCodePtr = ECONNRESET;
        return -1;
    }
	if (statePtr->flags & TLS_TCL_HANDSHAKE_FAILED) {
		/*
		 * We choose ECONNRESET over ECONNABORTED here because some server
		 * side code, on the wiki for example, sets up a read handler that
		 * does a read and if eof closes the channel. There is no catch/try
		 * around the reads so exceptions will result in potentially many
		 * dangling channels hanging around that should have been closed.
		 * (Backgroun: ECONNABORTED maps to a Tcl exception and 
		 * ECONNRESET maps to graceful EOF).
		 */
		*errorCodePtr = ECONNRESET;
		return(-1);
	}

    for (;;) {
	/* Not initialized yet! */
	if (statePtr->flags & TLS_TCL_SERVER) {
            dprintf("Calling SSL_accept()");
	    err = SSL_accept(statePtr->ssl);
	} else {
            dprintf("Calling SSL_connect()");
	    err = SSL_connect(statePtr->ssl);
	}
	for (;;) {
		/* Not initialized yet! */
		if (statePtr->flags & TLS_TCL_SERVER) {
			dprintf("Calling SSL_accept()");

			err = SSL_accept(statePtr->ssl);
		} else {
			dprintf("Calling SSL_connect()");

			err = SSL_connect(statePtr->ssl);
		}

	/*SSL_write(statePtr->ssl, (char*)&err, 0);	HACK!!! */
	if (err > 0) {
            dprintf("That seems to have gone okay");
	    BIO_flush(statePtr->bio);
	} else {
	    int rc = SSL_get_error(statePtr->ssl, err);
		if (err > 0) {
			dprintf("That seems to have gone okay");

			err = BIO_flush(statePtr->bio);

			if (err <= 0) {
				dprintf("Flushing the lower layers failed, this will probably terminate this session");
			}
		}

		rc = SSL_get_error(statePtr->ssl, err);

            dprintf("Got error: %i (rc = %i)", err, rc);
		dprintf("Got error: %i (rc = %i)", err, rc);

		bioShouldRetry = 0;
		if (err <= 0) {
			if (rc == SSL_ERROR_WANT_CONNECT || rc == SSL_ERROR_WANT_ACCEPT || rc == SSL_ERROR_WANT_READ || rc == SSL_ERROR_WANT_WRITE) {
				bioShouldRetry = 1;
			} else if (BIO_should_retry(statePtr->bio)) {
				bioShouldRetry = 1;
	    if (rc == SSL_ERROR_SSL) {
		Tls_Error(statePtr,
			} else if (rc == SSL_ERROR_SYSCALL && Tcl_GetErrno() == EAGAIN) {
				bioShouldRetry = 1;
			}
		} else {
			(char *)ERR_reason_error_string(ERR_get_error()));
                statePtr->flags |= TLS_TCL_HANDSHAKE_FAILED;
		*errorCodePtr = ECONNABORTED;
		return -1;
	    } else if (BIO_should_retry(statePtr->bio)) {
		if (statePtr->flags & TLS_TCL_ASYNC) {
		    dprintf("E! ");
		    *errorCodePtr = EAGAIN;
		    return -1;
		} else {
		    continue;
		}
	    } else if (err == 0) {
			if (!SSL_is_init_finished(statePtr->ssl)) {
				bioShouldRetry = 1;
			}
		}

		if (bioShouldRetry) {
			dprintf("The I/O did not complete -- but we should try it again");

			if (statePtr->flags & TLS_TCL_ASYNC) {
				dprintf("Returning EAGAIN so that it can be retried later");

				*errorCodePtr = EAGAIN;

				return(-1);
			} else {
				dprintf("Doing so now");

				continue;
			}
		}

                if (SSL_in_init(statePtr->ssl)) {
                    dprintf("SSL_in_init() is true");
                }
		dprintf("We have either completely established the session or completely failed it -- there is no more need to ever retry it though");
		break;
	}

                if (Tcl_Eof(statePtr->self)) {
                    dprintf("Error = 0 and EOF is set");

	*errorCodePtr = EINVAL;

	switch (rc) {
                    if (rc != SSL_ERROR_SYSCALL) {
                        dprintf("Error from some reason other than our BIO, returning 0");
                        return 0;
                    }
                }
		dprintf("CR! ");
		*errorCodePtr = ECONNRESET;
		return -1;
	    }
	    if (statePtr->flags & TLS_TCL_SERVER) {
		case SSL_ERROR_NONE:
			/* The connection is up, we are done here */
			dprintf("The connection is up");
			break;
		case SSL_ERROR_ZERO_RETURN:
			dprintf("SSL_ERROR_ZERO_RETURN: Connect returned an invalid value...")
			return(-1);
		case SSL_ERROR_SYSCALL:
			backingError = ERR_get_error();
			dprintf("I/O error occured");

			if (backingError == 0 && err == 0) {
				dprintf("EOF reached")
			}

			statePtr->flags |= TLS_TCL_HANDSHAKE_FAILED;
			*errorCodePtr = ECONNRESET;
			return(-1);
		case SSL_ERROR_SSL:
			dprintf("Got permanent fatal SSL error, aborting immediately");
			Tls_Error(statePtr, (char *)ERR_reason_error_string(ERR_get_error()));
			statePtr->flags |= TLS_TCL_HANDSHAKE_FAILED;
			*errorCodePtr = ECONNABORTED;
			return(-1);
		case SSL_ERROR_WANT_CONNECT:
		case SSL_ERROR_WANT_ACCEPT:
		case SSL_ERROR_WANT_X509_LOOKUP:
		default:
			dprintf("We got a confusing reply: %i", rc);
			*errorCodePtr = Tcl_GetErrno();
			dprintf("ERR(%d, %d) ", rc, *errorCodePtr);
			return(-1);
	}

#if 0
	if (statePtr->flags & TLS_TCL_SERVER) {
		dprintf("This is an TLS server, checking the certificate for the peer");

		err = SSL_get_verify_result(statePtr->ssl);
		if (err != X509_V_OK) {
			dprintf("Invalid certificate, returning in failure");
		    Tls_Error(statePtr,
			    (char *)X509_verify_cert_error_string(err));
                    statePtr->flags |= TLS_TCL_HANDSHAKE_FAILED;
		    *errorCodePtr = ECONNABORTED;
		    return -1;

			Tls_Error(statePtr, (char *)X509_verify_cert_error_string(err));
			statePtr->flags |= TLS_TCL_HANDSHAKE_FAILED;
			*errorCodePtr = ECONNABORTED;
			return(-1);
		}
	    }
	}
	    *errorCodePtr = Tcl_GetErrno();
	    dprintf("ERR(%d, %d) ", rc, *errorCodePtr);
	    return -1;
	}
	dprintf("R0! ");
#endif

	dprintf("Removing the \"TLS_TCL_INIT\" flag since we have completed the handshake");
	return 1;
    }
	statePtr->flags &= ~TLS_TCL_INIT;

}

	dprintf("Returning in success");
Tcl_Channel
Tls_GetParent( statePtr )
	*errorCodePtr = 0;
    State *statePtr;
{
    if (channelTypeVersion == TLS_CHANNEL_VERSION_2) {
	return Tcl_GetStackedChannel(statePtr->self);
    } else {
	/* The reason for the existence of this procedure is
	 * the fact that stacking a transform over another
	 * transform will leave our internal pointer unchanged,
	 * and thus pointing to the new transform, and not the
	 * Channel structure containing the saved state of this
	 * transform. This is the price to pay for leaving
	 * Tcl_Channel references intact. The only other solution
	 * is an extension of Tcl_ChannelType with another driver
	 * procedure to notify a Channel about the (un)stacking.
	 *

	 * It walks the chain of Channel structures until it
	 * finds the one pointing having 'ctrl' as instanceData
	 * and then returns the superceding channel to that. (AK)
	return(0);
	 */

}
	Tcl_Channel self = statePtr->self;
	Tcl_Channel next;

	while ((ClientData) statePtr != Tcl_GetChannelInstanceData (self)) {
	    next = Tcl_GetStackedChannel (self);
	    if (next == (Tcl_Channel) NULL) {
Tcl_Channel Tls_GetParent(State *statePtr, int maskFlags) {
	dprintf("Requested to get parent of channel %p", statePtr->self);
		/* 09/24/1999 Unstacking bug,
		 * found by Matt Newman <[email protected]>.
		 *

		 * We were unable to find the channel structure for this
		 * transformation in the chain of stacked channel. This
		 * means that we are currently in the process of unstacking
		 * it *and* there were some bytes waiting which are now
		 * flushed. In this situation the pointer to the channel
		 * itself already refers to the parent channel we have to
	if ((statePtr->flags & ~maskFlags) & TLS_TCL_FASTPATH) {
		dprintf("Asked to get the parent channel while we are using FastPath -- returning NULL");
		 * write the bytes into, so we return that.
		 */
		return statePtr->self;
	    }
		return(NULL);
	}
	    self = next;
	}


	return Tcl_GetStackedChannel (self);
	return(Tcl_GetStackedChannel(statePtr->self));
    }
}

 */
#ifndef _TLSINT_H
#define _TLSINT_H

#include "tls.h"
#include <errno.h>
#include <string.h>
#include <stdint.h>

#ifdef __WIN32__
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <wincrypt.h> /* OpenSSL needs this on Windows */
#endif

#  define NO_RC5
#  define NO_RSA
#  ifndef NO_SSL2
#    define NO_SSL2
#  endif
#endif

#ifdef BSAFE
#include <ssl.h>
#include <openssl/ssl.h>
#include <err.h>
#include <rand.h>
#else
#include <openssl/ssl.h>
#include <openssl/err.h>
#include <openssl/rand.h>
#include <openssl/err.h>
#include <openssl/rand.h>
#include <openssl/opensslv.h>
#endif

#ifndef NO_TLS1_1
#  ifndef SSL_OP_NO_TLSv1_1
#    define NO_TLS1_1
#  endif
#endif

/*
#ifndef NO_TLS1_2
#  ifndef SSL_OP_NO_TLSv1_2
#    define NO_TLS1_2
 * Determine if we should use the pre-OpenSSL 1.1.0 API
#  endif
#endif

 */
#ifdef TCL_STORAGE_CLASS
# undef TCL_STORAGE_CLASS
#undef TCLTLS_OPENSSL_PRE_1_1
#endif
#ifdef BUILD_tls
# define TCL_STORAGE_CLASS DLLEXPORT
#if (defined(LIBRESSL_VERSION_NUMBER)) || OPENSSL_VERSION_NUMBER < 0x10100000L
#else
# define TCL_STORAGE_CLASS DLLIMPORT
#  define TCLTLS_OPENSSL_PRE_1_1_API 1
#endif
 

#ifndef ECONNABORTED
#define ECONNABORTED	130	/* Software caused connection abort */
#endif
#ifndef ECONNRESET
#define ECONNRESET	131	/* Connection reset by peer */
#endif

#ifdef TCLEXT_TCLTLS_DEBUG
#include <ctype.h>
#define dprintf(...) { fprintf(stderr, "%s:%i:", __func__, __LINE__); fprintf(stderr, __VA_ARGS__); fprintf(stderr, "\n"); }
#define dprintf(...) { \
                       char dprintfBuffer[8192], *dprintfBuffer_p; \
                       dprintfBuffer_p = &dprintfBuffer[0]; \
                       dprintfBuffer_p += sprintf(dprintfBuffer_p, "%s:%i:%s():", __FILE__, __LINE__, __func__); \
                       dprintfBuffer_p += sprintf(dprintfBuffer_p, __VA_ARGS__); \
                       fprintf(stderr, "%s\n", dprintfBuffer); \
                     }
#define dprintBuffer(bufferName, bufferLength) { \
                                                 int dprintBufferIdx; \
                                                 unsigned char dprintBufferChar; \
                                                 fprintf(stderr, "%s:%i:%s():%s[%llu]={", __FILE__, __LINE__, __func__, #bufferName, (unsigned long long) bufferLength); \
                                                 for (dprintBufferIdx = 0; dprintBufferIdx < bufferLength; dprintBufferIdx++) { \
                                                         dprintBufferChar = bufferName[dprintBufferIdx]; \
                                                         if (isalpha(dprintBufferChar) || isdigit(dprintBufferChar)) { \
                                                                 fprintf(stderr, "'%c' ", dprintBufferChar); \
                                                         } else { \
                                                                 fprintf(stderr, "%02x ", (unsigned int) dprintBufferChar); \
                                                         }; \
                                                 }; \
                                                 fprintf(stderr, "}\n"); \
                                               }
#define dprintFlags(statePtr) { \
                                char dprintfBuffer[8192], *dprintfBuffer_p; \
                                dprintfBuffer_p = &dprintfBuffer[0]; \
                                dprintfBuffer_p += sprintf(dprintfBuffer_p, "%s:%i:%s():%s->flags=0", __FILE__, __LINE__, __func__, #statePtr); \
                                if (((statePtr)->flags & TLS_TCL_ASYNC) == TLS_TCL_ASYNC) { dprintfBuffer_p += sprintf(dprintfBuffer_p, "|TLS_TCL_ASYNC"); }; \
                                if (((statePtr)->flags & TLS_TCL_SERVER) == TLS_TCL_SERVER) { dprintfBuffer_p += sprintf(dprintfBuffer_p, "|TLS_TCL_SERVER"); }; \
                                if (((statePtr)->flags & TLS_TCL_INIT) == TLS_TCL_INIT) { dprintfBuffer_p += sprintf(dprintfBuffer_p, "|TLS_TCL_INIT"); }; \
                                if (((statePtr)->flags & TLS_TCL_DEBUG) == TLS_TCL_DEBUG) { dprintfBuffer_p += sprintf(dprintfBuffer_p, "|TLS_TCL_DEBUG"); }; \
                                if (((statePtr)->flags & TLS_TCL_CALLBACK) == TLS_TCL_CALLBACK) { dprintfBuffer_p += sprintf(dprintfBuffer_p, "|TLS_TCL_CALLBACK"); }; \
                                if (((statePtr)->flags & TLS_TCL_HANDSHAKE_FAILED) == TLS_TCL_HANDSHAKE_FAILED) { dprintfBuffer_p += sprintf(dprintfBuffer_p, "|TLS_TCL_HANDSHAKE_FAILED"); }; \
                                if (((statePtr)->flags & TLS_TCL_FASTPATH) == TLS_TCL_FASTPATH) { dprintfBuffer_p += sprintf(dprintfBuffer_p, "|TLS_TCL_FASTPATH"); }; \
                                fprintf(stderr, "%s\n", dprintfBuffer); \
                              }
#else
#define dprintf(...) if (0) { fprintf(stderr, __VA_ARGS__); }
#define dprintBuffer(bufferName, bufferLength) /**/
#define dprintFlags(statePtr) /**/
#endif

#define SSL_ERROR(ssl,err)	\
    ((char*)ERR_reason_error_string((unsigned long)SSL_get_error((ssl),(err))))
#define TCLTLS_SSL_ERROR(ssl,err) ((char*)ERR_reason_error_string((unsigned long)SSL_get_error((ssl),(err))))
/*
 * OpenSSL BIO Routines
 */
#define BIO_TYPE_TCL	(19|0x0400)

/*
 * Defines for State.flags
 */
#define TLS_TCL_ASYNC	(1<<0)	/* non-blocking mode */
#define TLS_TCL_SERVER	(1<<1)	/* Server-Side */
#define TLS_TCL_INIT	(1<<2)	/* Initializing connection */
#define TLS_TCL_DEBUG	(1<<3)	/* Show debug tracing */
#define TLS_TCL_CALLBACK	(1<<4)	/* In a callback, prevent update
					 * looping problem. [Bug 1652380] */
#define TLS_TCL_HANDSHAKE_FAILED (1<<5) /* Set on handshake failures and once
                                         * set, all further I/O will result
                                         * in ECONNABORTED errors. */

#define TLS_TCL_FASTPATH (1<<6)         /* The parent channel is being used directly by the SSL library */
#define TLS_TCL_DELAY (5)

/*
 * This structure describes the per-instance state
 * of an ssl channel.
 *
 * The SSL processing context is maintained here, in the ClientData
 */
typedef struct State {
    Tcl_Channel self;	/* this socket channel */
    Tcl_TimerToken timer;
	Tcl_Channel self;       /* this socket channel */
	Tcl_TimerToken timer;

    int flags;		/* see State.flags above  */
    int watchMask;	/* current WatchProc mask */
    int mode;		/* current mode of parent channel */
	int flags;              /* see State.flags above  */
	int watchMask;          /* current WatchProc mask */
	int mode;               /* current mode of parent channel */

    Tcl_Interp *interp;	/* interpreter in which this resides */
    Tcl_Obj *callback;	/* script called for tracing, verifying and errors */
    Tcl_Obj *password;	/* script called for certificate password */ 
	Tcl_Interp *interp;     /* interpreter in which this resides */
	Tcl_Obj *callback;      /* script called for tracing, verifying and errors */
	Tcl_Obj *password;      /* script called for certificate password */ 

    int vflags;		/* verify flags */
    SSL *ssl;		/* Struct for SSL processing */
    SSL_CTX *ctx;	/* SSL Context */
    BIO *bio;		/* Struct for SSL processing */
    BIO *p_bio;		/* Parent BIO (that is layered on Tcl_Channel) */
	int vflags;             /* verify flags */
	SSL *ssl;               /* Struct for SSL processing */
	SSL_CTX *ctx;           /* SSL Context */
	BIO *bio;               /* Struct for SSL processing */
	BIO *p_bio;             /* Parent BIO (that is layered on Tcl_Channel) */

    char *err;
	char *err;
} State;

/*
 * The following definitions have to be usable for 8.2.0-8.3.1 and 8.3.2+.
 * The differences between these versions:
 *
 * 8.0-8.1:	There is no support for these in TLS 1.4 (get 1.3).  This
 *		was the version with the original patch.
 *
 * 8.2.0-	Changed semantics for Tcl_StackChannel (Tcl_ReplaceChannel).
 * 8.3.1:	Check at runtime to switch the behaviour. The patch is part
 *		of the core from now on.
 *
 * 8.3.2+:	Stacked channels rewritten for better behaviour in some
 *		situations (closing). Some new API's, semantic changes.
 *
 * The following magic was adapted from Trf 2.1 (Kupries).
 */

#define TLS_CHANNEL_VERSION_1	0x1
#define TLS_CHANNEL_VERSION_2	0x2
extern int channelTypeVersion;

#ifdef USE_TCL_STUBS
#ifndef Tcl_StackChannel
/*
 * The core we are compiling against is not patched, so supply the
 * necesssary definitions here by ourselves. The form chosen for
 * the procedure macros (reservedXXX) will notify us if the core
 * does not have these reserved locations anymore.
 *
 * !! Synchronize the procedure indices in their definitions with
 *    the patch to tcl.decls, as they have to be the same.
 */

#error "Unable to compile on this version of Tcl"
/* 281 */
typedef Tcl_Channel (tls_StackChannel) _ANSI_ARGS_((Tcl_Interp* interp,
						    Tcl_ChannelType* typePtr,
						    ClientData instanceData,
						    int mask,
						    Tcl_Channel prevChan));
/* 282 */
typedef void (tls_UnstackChannel) _ANSI_ARGS_((Tcl_Interp* interp,
					       Tcl_Channel chan));

#define Tcl_StackChannel     ((tls_StackChannel*) tclStubsPtr->reserved281)
#define Tcl_UnstackChannel ((tls_UnstackChannel*) tclStubsPtr->reserved282)

#endif /* Tcl_StackChannel */

#ifndef Tcl_GetStackedChannel
/*
 * Separate definition, available in 8.2, but not 8.1 and before !
 */

/* 283 */
typedef Tcl_Channel (tls_GetStackedChannel) _ANSI_ARGS_((Tcl_Channel chan));

#define Tcl_GetStackedChannel ((tls_GetStackedChannel*) tclStubsPtr->reserved283)

#endif /* Tcl_GetStackedChannel */


#ifndef TCL_CHANNEL_VERSION_2
/*
 * Core is older than 8.3.2.  Supply the missing definitions for
 * the new API's in 8.3.2.
 */
#define EMULATE_CHANNEL_VERSION_2

typedef struct TlsChannelTypeVersion_* TlsChannelTypeVersion;
#define TCL_CHANNEL_VERSION_2	((TlsChannelTypeVersion) 0x2)

typedef int (TlsDriverHandlerProc) _ANSI_ARGS_((ClientData instanceData,
					int interestMask));
/* 394 */
typedef int (tls_ReadRaw)  _ANSI_ARGS_((Tcl_Channel chan, char *dst,
					int bytesToRead));
/* 395 */
typedef int (tls_WriteRaw) _ANSI_ARGS_((Tcl_Channel chan, char *src,
					int srcLen));
/* 397 */
typedef int (tls_GetTopChannel) _ANSI_ARGS_((Tcl_Channel chan));

/*
 * Generating code for accessing these parts of the stub table when
 * compiling against a core older than 8.3.2 is a hassle because even
 * the 'reservedXXX' fields of the structure are not defined yet. So
 * we have to write up some macros hiding some very hackish pointer
 * arithmetics to get at these fields. We assume that pointer to
 * functions are always of the same size.
 */

#define STUB_BASE   ((char*)(&(tclStubsPtr->tcl_UtfNcasecmp))) /* field 370 */
#define procPtrSize (sizeof (Tcl_DriverBlockModeProc *))
#define IDX(n)      (((n)-370) * procPtrSize)
#define SLOT(n)     (STUB_BASE + IDX(n))

#define Tcl_ReadRaw		(*((tls_ReadRaw**)	(SLOT(394))))
#define Tcl_WriteRaw		(*((tls_WriteRaw**)	(SLOT(395))))
#define Tcl_GetTopChannel	(*((tls_GetTopChannel**)(SLOT(396))))

/*
 * Required, easy emulation.
 */
#define Tcl_ChannelGetOptionProc(chanDriver) ((chanDriver)->getOptionProc)

#endif /* TCL_CHANNEL_VERSION_2 */

#endif /* USE_TCL_STUBS */

/*
 * Forward declarations
 */

Tcl_ChannelType *Tls_ChannelType _ANSI_ARGS_((void));
Tcl_Channel	Tls_GetParent _ANSI_ARGS_((State *statePtr));
Tcl_ChannelType *Tls_ChannelType(void);
Tcl_Channel     Tls_GetParent(State *statePtr, int maskFlags);

Tcl_Obj*		Tls_NewX509Obj _ANSI_ARGS_ (( Tcl_Interp *interp, X509 *cert));
void		Tls_Error _ANSI_ARGS_ ((State *statePtr, char *msg));
void		Tls_Free _ANSI_ARGS_ ((char *blockPtr));
void		Tls_Clean _ANSI_ARGS_ ((State *statePtr));
int		Tls_WaitForConnect _ANSI_ARGS_(( State *statePtr,
Tcl_Obj         *Tls_NewX509Obj(Tcl_Interp *interp, X509 *cert);
void            Tls_Error(State *statePtr, char *msg);
void            Tls_Free(char *blockPtr);
void            Tls_Clean(State *statePtr);
int             Tls_WaitForConnect(State *statePtr, int *errorCodePtr);
							int *errorCodePtr));

BIO *		BIO_new_tcl _ANSI_ARGS_((State* statePtr, int flags));
BIO             *BIO_new_tcl(State* statePtr, int flags);

#define PTR2INT(x) ((int) ((intptr_t) (x)))

#endif /* _TLSINT_H */

    char issuer[BUFSIZ];
    char serial[BUFSIZ];
    char notBefore[BUFSIZ];
    char notAfter[BUFSIZ];
    char certStr[BUFSIZ];
#ifndef NO_SSL_SHA
    int shai;
    char sha_hash[SHA_DIGEST_LENGTH*2];
    char sha_hash_ascii[SHA_DIGEST_LENGTH * 2 + 1];
    unsigned char sha_hash_binary[SHA_DIGEST_LENGTH];
    const char *shachars="0123456789ABCDEF";

    sha_hash_ascii[SHA_DIGEST_LENGTH * 2] = '\0';
#endif

    certStr[0] = 0;
    if ((bio = BIO_new(BIO_s_mem())) == NULL) {
	subject[0] = 0;
	issuer[0]  = 0;
	serial[0]  = 0;
    } else {
	flags = XN_FLAG_RFC2253 | ASN1_STRFLGS_UTF8_CONVERT;
	flags &= ~ASN1_STRFLGS_ESC_MSB;

	X509_NAME_print_ex(bio, X509_get_subject_name(cert), 0, flags); 
	n = BIO_read(bio, subject, min(BIO_pending(bio), BUFSIZ - 1));
	n = max(n, 0);
	subject[n] = 0;
	BIO_flush(bio);
	(void)BIO_flush(bio);

	X509_NAME_print_ex(bio, X509_get_issuer_name(cert), 0, flags);
	n = BIO_read(bio, issuer, min(BIO_pending(bio), BUFSIZ - 1));
	n = max(n, 0);
	issuer[n] = 0;
	BIO_flush(bio);
	(void)BIO_flush(bio);

	i2a_ASN1_INTEGER(bio, X509_get_serialNumber(cert));
	n = BIO_read(bio, serial, min(BIO_pending(bio), BUFSIZ - 1));
	n = max(n, 0);
	serial[n] = 0;
	BIO_flush(bio);
	(void)BIO_flush(bio);

        if (PEM_write_bio_X509(bio, cert)) {
            n = BIO_read(bio, certStr, min(BIO_pending(bio), BUFSIZ - 1));
            n = max(n, 0);
            certStr[n] = 0;
            BIO_flush(bio);
            (void)BIO_flush(bio);
        }

	BIO_free(bio);
    }

    strcpy( notBefore, ASN1_UTCTIME_tostr( X509_get_notBefore(cert) ));
    strcpy( notAfter, ASN1_UTCTIME_tostr( X509_get_notAfter(cert) ));

#ifndef NO_SSL_SHA
    X509_digest(cert, EVP_sha1(), sha_hash_binary, NULL);
    for (shai=0;shai<SHA_DIGEST_LENGTH;shai++)
    for (shai = 0; shai < SHA_DIGEST_LENGTH; shai++) {
    {
        sha_hash[shai * 2]=shachars[(cert->sha1_hash[shai] & 0xF0) >> 4];
        sha_hash[shai * 2 + 1]=shachars[(cert->sha1_hash[shai] & 0x0F)];
        sha_hash_ascii[shai * 2]     = shachars[(sha_hash_binary[shai] & 0xF0) >> 4];
        sha_hash_ascii[shai * 2 + 1] = shachars[(sha_hash_binary[shai] & 0x0F)];
    }
    Tcl_ListObjAppendElement( interp, certPtr,
    Tcl_ListObjAppendElement( interp, certPtr, Tcl_NewStringObj("sha1_hash", -1) );
	    Tcl_NewStringObj( "sha1_hash", -1) );
    Tcl_ListObjAppendElement( interp, certPtr,
    Tcl_ListObjAppendElement( interp, certPtr, Tcl_NewStringObj(sha_hash_ascii, SHA_DIGEST_LENGTH * 2) );
	    Tcl_NewStringObj( sha_hash, SHA_DIGEST_LENGTH*2) );

#endif
    Tcl_ListObjAppendElement( interp, certPtr,
	    Tcl_NewStringObj( "subject", -1) );
    Tcl_ListObjAppendElement( interp, certPtr,
	    Tcl_NewStringObj( subject, -1) );