# # Copyright (C) 1997-2000 Matt Newman # # $Header: /home/rkeene/tmp/cvs2fossil/../tcltls/tls/tls/tls.tcl,v 1.5 2003/05/15 21:02:10 razzell Exp $ # namespace eval tls { variable logcmd tclLog variable debug 0 # Default flags passed to tls::import variable defaults {} # Maps UID to Server Socket variable srvmap variable srvuid 0 } # # Backwards compatibility, also used to set the default # context options # proc tls::init {args} { variable defaults set defaults $args } # # Helper function - behaves exactly as the native socket command. # proc tls::socket {args} { set idx [lsearch $args -server] if {$idx != -1} { set server 1 set callback [lindex $args [expr {$idx+1}]] set args [lreplace $args $idx [expr {$idx+1}]] set usage "wrong # args: should be \"tls::socket -server command ?options? port\"" set options "-cadir, -cafile, -certfile, -cipher, -command, -keyfile, -myaddr, -password, -request, -require, -ssl2, -ssl3, or -tls1" } else { set server 0 set usage "wrong # args: should be \"tls::socket ?options? host port\"" set options "-async, -cadir, -cafile, -certfile, -cipher, -command, -keyfile, -myaddr, -myport, -password, -request, -require, -ssl2, -ssl3, or -tls1" } 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,-async {lappend sopts $arg} 0,-myaddr - *,-myport {lappend sopts $arg [lindex $args [incr idx]]} *,-cadir - *,-cafile - *,-certfile - *,-cipher - *,-command - *,-keyfile - *,-password - *,-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}]] set port [lindex $args [expr {$argc-1}]] lappend sopts $host $port } # # Create TCP/IP socket # set chan [eval ::socket $sopts] if {!$server && [catch { # # Push SSL layer onto socket # eval [list tls::import] $chan $iopts } 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 # verify # info # proc tls::callback {option args} { variable debug #log 2 [concat $option $args] switch -- $option { "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 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} $args break if {$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" } } } proc tls::xhandshake {chan} { upvar #0 tls::$chan cb if {[info exists cb(handshake)] && \ $cb(handshake) == "done"} { return 1 } while {1} { vwait tls::${chan}(handshake) if {![info exists cb(handshake)]} { return 0 } if {$cb(handshake) == "done"} { return 1 } } } proc tls::password {} { log 0 "TLS/Password: did you forget to set your passwd!" # Return the worlds best kept secret password. return "secret" } proc tls::log {level msg} { variable debug variable logcmd if {$level > $debug || $logcmd == ""} { return } set cmd $logcmd lappend cmd $msg uplevel #0 $cmd }