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Bounty program for improvements to Tcl and certain Tcl packages.

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#
# Copyright (C) 1997-2000 Matt Newman <[email protected]>
#
# $Header: /home/rkeene/tmp/cvs2fossil/../tcltls/tls/tls/tls.tcl,v 1.2 2000/01/20 01:51:05 aborr Exp $
# $Header: /home/rkeene/tmp/cvs2fossil/../tcltls/tls/tls/tls.tcl,v 1.2.2.1 2000/07/21 05:32:56 hobbs Exp $
#
namespace eval tls {
    variable logcmd tclLog
    variable debug 0
 
    # Default flags passed to tls::import
    variable defaults {}
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    set argc [llength $args]
    set sopts {}
    set iopts [concat [list -server $server] ${tls::defaults}]	;# Import options

    for {set idx 0} {$idx < $argc} {incr idx} {
	set arg [lindex $args $idx]
	switch -glob -- $server,$arg {
	0,-myport	-
	*,-myaddr	{lappend sopts $arg [lindex $args [incr idx]]}
	0,-async	{lappend sopts $arg}
	*,-cipher	-
	*,-cadir	-
	*,-cafile	-
	*,-certfile	-
	*,-keyfile	-
	*,-command	-
	*,-request	-
	*,-require	-
	*,-ssl2		-
	*,-ssl3		-
	*,-tls1		{lappend iopts $arg [lindex $args [incr idx]]}
	-*		{return -code error "bad option \"$arg\": must be one of $options"}
	default	{break}
	    0,-myport	-
	    *,-myaddr	{lappend sopts $arg [lindex $args [incr idx]]}
	    0,-async	{lappend sopts $arg}
	    *,-cipher	-
	    *,-cadir	-
	    *,-cafile	-
	    *,-certfile	-
	    *,-keyfile	-
	    *,-command	-
	    *,-request	-
	    *,-require	-
	    *,-ssl2	-
	    *,-ssl3	-
	    *,-tls1	{lappend iopts $arg [lindex $args [incr idx]]}
	    -*		{return -code error "bad option \"$arg\": must be one of $options"}
	    default	{break}
	}
    }
    if {$server} {
	if {($idx + 1) != $argc} {
	    return -code error $usage
	}
	set uid [incr ::tls::srvuid]

	set port [lindex $args [expr {$argc-1}]]
	lappend sopts $port
	#set sopts [linsert $sopts 0 -server $callback]
	set sopts [linsert $sopts 0 -server [list tls::_accept $iopts $callback]]
	#set sopts [linsert $sopts 0 -server [list tls::_accept $uid $callback]]
    } else {
	if {($idx + 2) != $argc} {
	    return -code error $usage
	}
	set host [lindex $args [expr {$argc-2}]]
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    } err]} {
	set info ${::errorInfo}
	catch {close $chan}
	return -code error -errorinfo $info $err
    }
    return $chan
}

# tls::_accept --
#
#   This is the actual accept that TLS sockets use, which then calls
#   the callback registered by tls::socket.
#
# Arguments:
#   iopts	tls::import opts
#   callback	server callback to invoke
#   chan	socket channel to accept/deny
#   ipaddr	calling IP address
#   port	calling port
#
# Results:
#   Returns an error if the callback throws one.
#
proc tls::_accept { iopts callback chan ipaddr port } {
    log 2 [list tls::_accept $iopts $callback $chan $ipaddr $port]

    set chan [eval [list tls::import $chan] $iopts]

    lappend callback $chan $ipaddr $port
    if {[catch {
	uplevel #0 $callback
    } err]} {
	log 1 "tls::_accept error: ${::errorInfo}"
	close $chan
	error $err $::errorInfo $::errorCode
    } else {
	log 2 "tls::_accept - called \"$callback\" succeeded"
    }
}
#
# Sample callback for hooking: -
#
# error
# info
# password
# verify
#
proc tls::callback {option args} {
    variable debug

    #log 2 [concat $option $args]

    switch -- $option {
    "error"	{
	foreach {chan msg} $args break
	"error"	{
	    foreach {chan msg} $args break

	log 0 "TLS/$chan: error: $msg"
    }
    "verify"	{
	# poor man's lassign
	foreach {chan depth cert rc err} $args break
	    log 0 "TLS/$chan: error: $msg"
	}
	"verify"	{
	    # poor man's lassign
	    foreach {chan depth cert rc err} $args break

	array set c $cert
	    array set c $cert

	if {$rc != "1"} {
	    log 1 "TLS/$chan: verify/$depth: Bad Cert: $err (rc = $rc)"
	} else {
	    log 2 "TLS/$chan: verify/$depth: $c(subject)"
	}
	if {$debug > 0} {
	    return 1;	# FORCE OK
	} else {
	    return $rc
	}
    }
    "info"	{
	# poor man's lassign
	foreach {chan major minor state msg} $args break
	    if {$rc != "1"} {
		log 1 "TLS/$chan: verify/$depth: Bad Cert: $err (rc = $rc)"
	    } else {
		log 2 "TLS/$chan: verify/$depth: $c(subject)"
	    }
	    if {$debug > 0} {
		return 1;	# FORCE OK
	    } else {
		return $rc
	    }
	}
	"info"	{
	    # poor man's lassign
	    foreach {chan major minor state msg} $args break

	if {$msg != ""} {
	    append state ": $msg"
	}
	# For tracing
	upvar #0 tls::$chan cb
	set cb($major) $minor
	    if {$msg != ""} {
		append state ": $msg"
	    }
	    # For tracing
	    upvar #0 tls::$chan cb
	    set cb($major) $minor

	log 2 "TLS/$chan: $major/$minor: $state"
    }
    default	{
	return -code error "bad option \"$option\": must be one of error, info, or verify"
    }
	    log 2 "TLS/$chan: $major/$minor: $state"
	}
	default	{
	    return -code error "bad option \"$option\":\
		    must be one of error, info, or verify"
	}
    };#sw
    }
}

proc tls::xhandshake {chan} {
    upvar #0 tls::$chan cb

    if {[info exists cb(handshake)] && \
	$cb(handshake) == "done"} {