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
153
154
155
|
# 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 version 1.1.0
variable rcsid {$Id: md5crypt.tcl,v 1.5 2008/01/26 23:56:26 patthoyts Exp $}
variable itoa64 \
{./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz}
namespace import -force ::md5::MD5Init ::md5::MD5Update ::md5::MD5Final
namespace export md5crypt
}
proc ::md5crypt::to64_tcl {v n} {
variable itoa64
for {} {$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 $::md5crypt::version
# -------------------------------------------------------------------------
# Local Variables:
# mode: tcl
# indent-tabs-mode: nil
# End:
|
