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Commit | Line | Data |
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ef416fc2 | 1 | /* |
503b54c9 | 2 | * MD5 password support for CUPS. |
ef416fc2 | 3 | * |
503b54c9 MS |
4 | * Copyright 2007-2010 by Apple Inc. |
5 | * Copyright 1997-2005 by Easy Software Products. | |
ef416fc2 | 6 | * |
503b54c9 MS |
7 | * These coded instructions, statements, and computer programs are the |
8 | * property of Apple Inc. and are protected by Federal copyright | |
9 | * law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
10 | * which should have been included with this file. If this file is | |
57b7b66b | 11 | * missing or damaged, see the license at "http://www.cups.org/". |
ef416fc2 | 12 | * |
503b54c9 | 13 | * This file is subject to the Apple OS-Developed Software exception. |
ef416fc2 | 14 | */ |
15 | ||
16 | /* | |
17 | * Include necessary headers... | |
18 | */ | |
19 | ||
f7deaa1a | 20 | #include "http-private.h" |
71e16022 | 21 | #include "string-private.h" |
ef416fc2 | 22 | |
23 | ||
24 | /* | |
25 | * 'httpMD5()' - Compute the MD5 sum of the username:group:password. | |
26 | */ | |
27 | ||
28 | char * /* O - MD5 sum */ | |
29 | httpMD5(const char *username, /* I - User name */ | |
30 | const char *realm, /* I - Realm name */ | |
31 | const char *passwd, /* I - Password string */ | |
32 | char md5[33]) /* O - MD5 string */ | |
33 | { | |
34 | _cups_md5_state_t state; /* MD5 state info */ | |
35 | unsigned char sum[16]; /* Sum data */ | |
36 | char line[256]; /* Line to sum */ | |
37 | ||
38 | ||
39 | /* | |
40 | * Compute the MD5 sum of the user name, group name, and password. | |
41 | */ | |
42 | ||
43 | snprintf(line, sizeof(line), "%s:%s:%s", username, realm, passwd); | |
757d2cad | 44 | _cupsMD5Init(&state); |
45 | _cupsMD5Append(&state, (unsigned char *)line, (int)strlen(line)); | |
46 | _cupsMD5Finish(&state, sum); | |
ef416fc2 | 47 | |
48 | /* | |
49 | * Return the sum... | |
50 | */ | |
51 | ||
52 | return (httpMD5String(sum, md5)); | |
53 | } | |
54 | ||
55 | ||
56 | /* | |
57 | * 'httpMD5Final()' - Combine the MD5 sum of the username, group, and password | |
58 | * with the server-supplied nonce value, method, and | |
59 | * request-uri. | |
60 | */ | |
61 | ||
62 | char * /* O - New sum */ | |
63 | httpMD5Final(const char *nonce, /* I - Server nonce value */ | |
64 | const char *method, /* I - METHOD (GET, POST, etc.) */ | |
65 | const char *resource, /* I - Resource path */ | |
66 | char md5[33]) /* IO - MD5 sum */ | |
67 | { | |
68 | _cups_md5_state_t state; /* MD5 state info */ | |
69 | unsigned char sum[16]; /* Sum data */ | |
70 | char line[1024]; /* Line of data */ | |
71 | char a2[33]; /* Hash of method and resource */ | |
72 | ||
73 | ||
74 | /* | |
75 | * First compute the MD5 sum of the method and resource... | |
76 | */ | |
77 | ||
78 | snprintf(line, sizeof(line), "%s:%s", method, resource); | |
757d2cad | 79 | _cupsMD5Init(&state); |
80 | _cupsMD5Append(&state, (unsigned char *)line, (int)strlen(line)); | |
81 | _cupsMD5Finish(&state, sum); | |
ef416fc2 | 82 | httpMD5String(sum, a2); |
83 | ||
84 | /* | |
85 | * Then combine A1 (MD5 of username, realm, and password) with the nonce | |
86 | * and A2 (method + resource) values to get the final MD5 sum for the | |
87 | * request... | |
88 | */ | |
89 | ||
90 | snprintf(line, sizeof(line), "%s:%s:%s", md5, nonce, a2); | |
91 | ||
757d2cad | 92 | _cupsMD5Init(&state); |
93 | _cupsMD5Append(&state, (unsigned char *)line, (int)strlen(line)); | |
94 | _cupsMD5Finish(&state, sum); | |
ef416fc2 | 95 | |
96 | return (httpMD5String(sum, md5)); | |
97 | } | |
98 | ||
99 | ||
100 | /* | |
101 | * 'httpMD5String()' - Convert an MD5 sum to a character string. | |
102 | */ | |
103 | ||
104 | char * /* O - MD5 sum in hex */ | |
105 | httpMD5String(const unsigned char *sum, /* I - MD5 sum data */ | |
106 | char md5[33]) | |
107 | /* O - MD5 sum in hex */ | |
108 | { | |
109 | int i; /* Looping var */ | |
110 | char *md5ptr; /* Pointer into MD5 string */ | |
111 | static const char hex[] = "0123456789abcdef"; | |
112 | /* Hex digits */ | |
113 | ||
114 | ||
115 | /* | |
116 | * Convert the MD5 sum to hexadecimal... | |
117 | */ | |
118 | ||
119 | for (i = 16, md5ptr = md5; i > 0; i --, sum ++) | |
120 | { | |
121 | *md5ptr++ = hex[*sum >> 4]; | |
122 | *md5ptr++ = hex[*sum & 15]; | |
123 | } | |
124 | ||
125 | *md5ptr = '\0'; | |
126 | ||
127 | return (md5); | |
128 | } |