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1 | /* |
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2 | ** Copyright 2001-2008 Double Precision, Inc. See COPYING for |
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3 | ** distribution information. |
4 | */ |
5 | |
6 | #if HAVE_CONFIG_H |
7 | #include "courier_auth_config.h" |
8 | #endif |
9 | #include <string.h> |
10 | #if HAVE_UNISTD_H |
11 | #include <unistd.h> |
12 | #endif |
13 | #include <stdlib.h> |
14 | #if HAVE_CRYPT_H |
15 | #include <crypt.h> |
16 | #endif |
17 | #include "auth.h" |
18 | #include <sys/time.h> |
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19 | #include "md5/md5.h" |
20 | #include "sha1/sha1.h" |
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21 | |
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22 | static const char rcsid[]="$Id: cryptpassword.c,v 1.10 2008/07/10 02:43:55 mrsam Exp $"; |
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23 | |
24 | #if HAVE_CRYPT |
25 | #if NEED_CRYPT_PROTOTYPE |
26 | extern char *crypt(const char *, const char *); |
27 | #endif |
28 | #endif |
29 | |
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30 | static const char crypt_salt[65]="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789./"; |
31 | |
32 | static const char *crypt_hash(const char *pw) |
33 | { |
34 | struct timeval tv; |
35 | char salt[3]; |
36 | |
37 | gettimeofday(&tv, NULL); |
38 | |
39 | tv.tv_sec |= tv.tv_usec; |
40 | tv.tv_sec ^= getpid(); |
41 | |
42 | salt[0]=crypt_salt[ tv.tv_sec % 64 ]; |
43 | |
44 | tv.tv_sec /= 64; |
45 | |
46 | salt[1]=crypt_salt[ tv.tv_sec % 64 ]; |
47 | salt[2]=0; |
48 | |
49 | return (crypt(pw, salt)); |
50 | } |
51 | |
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52 | static const char *crypt_md5_wrapper(const char *pw) |
53 | { |
54 | struct timeval tv; |
55 | char salt[10]; |
56 | int i; |
57 | |
58 | gettimeofday(&tv, NULL); |
59 | |
60 | tv.tv_sec |= tv.tv_usec; |
61 | tv.tv_sec ^= getpid(); |
62 | |
63 | strcpy(salt, "$1$"); |
64 | |
65 | for (i=3; i<8; i++) |
66 | { |
67 | salt[i]=crypt_salt[ tv.tv_sec % 64 ]; |
68 | tv.tv_sec /= 64; |
69 | } |
70 | |
71 | strcpy(salt+i, "$"); |
72 | |
73 | return (md5_crypt(pw, salt)); |
74 | } |
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75 | |
76 | char *authcryptpasswd(const char *password, const char *encryption_hint) |
77 | { |
78 | const char *(*hash_func)(const char *)=0; |
79 | const char *pfix=0; |
80 | const char *p; |
81 | char *pp; |
82 | |
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83 | if (!encryption_hint || strncmp(encryption_hint, "$1$", 3) == 0) |
84 | { |
85 | pfix=""; |
86 | hash_func=crypt_md5_wrapper; |
87 | } |
88 | |
89 | if (!encryption_hint || strncasecmp(encryption_hint, "{MD5}", 5) == 0) |
90 | { |
91 | hash_func= &md5_hash_courier; |
92 | pfix="{MD5}"; |
93 | } |
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94 | |
95 | if (!encryption_hint || strncasecmp(encryption_hint, "{MD5RAW}", 5) |
96 | == 0) |
97 | { |
98 | hash_func= &md5_hash_raw; |
99 | pfix="{MD5RAW}"; |
100 | } |
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101 | |
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102 | if (!encryption_hint || strncasecmp(encryption_hint, "{SHA}", 5) == 0) |
103 | { |
104 | hash_func= &sha1_hash; |
105 | pfix="{SHA}"; |
106 | } |
107 | |
108 | if (!encryption_hint || |
109 | strncasecmp(encryption_hint, "{SHA256}", 8) == 0) |
110 | { |
111 | hash_func= &sha256_hash; |
112 | pfix="{SHA256}"; |
113 | } |
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114 | |
115 | if (!hash_func) |
116 | { |
117 | hash_func= &crypt_hash; |
118 | pfix="{CRYPT}"; |
119 | } |
120 | |
121 | p= (*hash_func)(password); |
122 | if (!p || (pp=malloc(strlen(pfix)+strlen(p)+1)) == 0) |
123 | return (0); |
124 | |
125 | return (strcat(strcpy(pp, pfix), p)); |
126 | } |