/usr/share/tcltk/tcllib1.17/md5crypt/md5crypt.tcl is in tcllib 1.17-dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 | # md5crypt.tcl - Copyright (C) 2003 Pat Thoyts <patthoyts@users.sourceforge.net>
#
# This file provides a pure tcl implementation of the BSD MD5 crypt algorithm.
# The implementation is based upon the OpenBSD code which is in turn based upon
# the original code by Poul-Henning Kamp.
#
# -------------------------------------------------------------------------
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
# -------------------------------------------------------------------------
# @mdgen EXCLUDE: md5cryptc.tcl
package require Tcl 8.2; # tcl minimum version
package require md5 2; # tcllib 1.5
# Try and load a compiled extension to help.
if {[catch {package require tcllibc}]} {
catch {package require md5cryptc}
}
namespace eval md5crypt {
variable itoa64 \
{./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz}
namespace import -force ::md5::MD5Init ::md5::MD5Update ::md5::MD5Final
namespace export md5crypt
}
proc ::md5crypt::to64_tcl {v n} {
variable itoa64
for {} {$n > 0} {incr n -1} {
set i [expr {$v & 0x3f}]
append s [string index $itoa64 $i]
set v [expr {($v >> 6) & 0x3FFFFFFF}]
}
return $s
}
# ::md5crypt::salt --
# Generate a salt string suitable for use with the md5crypt command.
proc ::md5crypt::salt {{len 8}} {
variable itoa64
set salt ""
for {set n 0} {$n < $len} {incr n} {
append salt [string index $itoa64 [expr {int(rand() * 64)}]]
}
return $salt
}
proc ::md5crypt::md5crypt_tcl {magic pw salt} {
set sp 0
set start 0
if {[string match "${magic}*" $salt]} {
set start [string length $magic]
}
set end [string first $ $salt $start]
if {$end < 0} {set end [string length $salt]} else {incr end -1}
if {$end - $start > 7} {set end [expr {$start + 7}]}
set salt [string range $salt $start $end]
set ctx [MD5Init]
MD5Update $ctx $pw
MD5Update $ctx $magic
MD5Update $ctx $salt
set ctx2 [MD5Init]
MD5Update $ctx2 $pw
MD5Update $ctx2 $salt
MD5Update $ctx2 $pw
set H2 [MD5Final $ctx2]
for {set pl [string length $pw]} {$pl > 0} {incr pl -16} {
set tl [expr {($pl > 16 ? 16 : $pl) - 1}]
MD5Update $ctx [string range $H2 0 $tl]
}
for {set i [string length $pw]} {$i != 0} {set i [expr {$i >> 1}]} {
if {$i & 1} {
set c \0
} else {
set c [string index $pw 0]
}
MD5Update $ctx $c
}
set result "${magic}${salt}\$"
set H [MD5Final $ctx]
for {set i 0} {$i < 1000} {incr i} {
set ctx [MD5Init]
if {$i & 1} {
MD5Update $ctx $pw
} else {
MD5Update $ctx $H
}
if {$i % 3} {
MD5Update $ctx $salt
}
if {$i % 7} {
MD5Update $ctx $pw
}
if {$i & 1} {
MD5Update $ctx $H
} else {
MD5Update $ctx $pw
}
set H [MD5Final $ctx]
}
binary scan $H c* Vs
foreach v $Vs {lappend V [expr {$v & 0xFF}]}
set l [expr {([lindex $V 0] << 16) | ([lindex $V 6] << 8) | [lindex $V 12]}]
append result [to64 $l 4]
set l [expr {([lindex $V 1] << 16) | ([lindex $V 7] << 8) | [lindex $V 13]}]
append result [to64 $l 4]
set l [expr {([lindex $V 2] << 16) | ([lindex $V 8] << 8) | [lindex $V 14]}]
append result [to64 $l 4]
set l [expr {([lindex $V 3] << 16) | ([lindex $V 9] << 8) | [lindex $V 15]}]
append result [to64 $l 4]
set l [expr {([lindex $V 4] << 16) | ([lindex $V 10] << 8) | [lindex $V 5]}]
append result [to64 $l 4]
set l [expr {[lindex $V 11]}]
append result [to64 $l 2]
return $result
}
if {[info commands ::md5crypt::to64_c] == {}} {
interp alias {} ::md5crypt::to64 {} ::md5crypt::to64_tcl
} else {
interp alias {} ::md5crypt::to64 {} ::md5crypt::to64_c
}
if {[info commands ::md5crypt::md5crypt_c] == {}} {
interp alias {} ::md5crypt::md5crypt {} ::md5crypt::md5crypt_tcl {$1$}
interp alias {} ::md5crypt::aprcrypt {} ::md5crypt::md5crypt_tcl {$apr1$}
} else {
interp alias {} ::md5crypt::md5crypt {} ::md5crypt::md5crypt_c {$1$}
interp alias {} ::md5crypt::aprcrypt {} ::md5crypt::md5crypt_c {$apr1$}
}
# -------------------------------------------------------------------------
package provide md5crypt 1.1.0
# -------------------------------------------------------------------------
# Local Variables:
# mode: tcl
# indent-tabs-mode: nil
# End:
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