]>
Commit | Line | Data |
---|---|---|
83d1c306 GCPL |
1 | /* |
2 | * The crypt_blowfish homepage is: | |
3 | * | |
4 | * http://www.openwall.com/crypt/ | |
5 | * | |
6 | * This code comes from John the Ripper password cracker, with reentrant | |
7 | * and crypt(3) interfaces added, but optimizations specific to password | |
8 | * cracking removed. | |
9 | * | |
10 | * Written by Solar Designer <solar at openwall.com> in 1998-2011. | |
11 | * No copyright is claimed, and the software is hereby placed in the public | |
12 | * domain. In case this attempt to disclaim copyright and place the software | |
13 | * in the public domain is deemed null and void, then the software is | |
14 | * Copyright (c) 1998-2011 Solar Designer and it is hereby released to the | |
15 | * general public under the following terms: | |
16 | * | |
17 | * Redistribution and use in source and binary forms, with or without | |
18 | * modification, are permitted. | |
19 | * | |
20 | * There's ABSOLUTELY NO WARRANTY, express or implied. | |
21 | * | |
22 | * It is my intent that you should be able to use this on your system, | |
23 | * as part of a software package, or anywhere else to improve security, | |
24 | * ensure compatibility, or for any other purpose. I would appreciate | |
25 | * it if you give credit where it is due and keep your modifications in | |
26 | * the public domain as well, but I don't require that in order to let | |
27 | * you place this code and any modifications you make under a license | |
28 | * of your choice. | |
29 | * | |
30 | * This implementation is mostly compatible with OpenBSD's bcrypt.c (prefix | |
31 | * "$2a$") by Niels Provos <provos at citi.umich.edu>, and uses some of his | |
32 | * ideas. The password hashing algorithm was designed by David Mazieres | |
33 | * <dm at lcs.mit.edu>. For more information on the level of compatibility, | |
34 | * prefer refer to the comments in BF_set_key() below and to the included | |
35 | * crypt(3) man page. | |
36 | * | |
37 | * There's a paper on the algorithm that explains its design decisions: | |
38 | * | |
39 | * http://www.usenix.org/events/usenix99/provos.html | |
40 | * | |
41 | * Some of the tricks in BF_ROUND might be inspired by Eric Young's | |
42 | * Blowfish library (I can't be sure if I would think of something if I | |
43 | * hadn't seen his code). | |
44 | */ | |
45 | ||
46 | #include <efi.h> | |
47 | #include <efilib.h> | |
48 | ||
49 | /* Just to make sure the prototypes match the actual definitions */ | |
50 | #include "crypt_blowfish.h" | |
51 | ||
52 | typedef unsigned int BF_word; | |
53 | typedef signed int BF_word_signed; | |
54 | ||
55 | /* Number of Blowfish rounds, this is also hardcoded into a few places */ | |
56 | #define BF_N 16 | |
57 | ||
58 | typedef BF_word BF_key[BF_N + 2]; | |
59 | ||
60 | typedef struct { | |
61 | BF_word S[4][0x100]; | |
62 | BF_key P; | |
63 | } BF_ctx; | |
64 | ||
65 | /* | |
66 | * Magic IV for 64 Blowfish encryptions that we do at the end. | |
67 | * The string is "OrpheanBeholderScryDoubt" on big-endian. | |
68 | */ | |
69 | static BF_word BF_magic_w[6] = { | |
70 | 0x4F727068, 0x65616E42, 0x65686F6C, | |
71 | 0x64657253, 0x63727944, 0x6F756274 | |
72 | }; | |
73 | ||
74 | /* | |
75 | * P-box and S-box tables initialized with digits of Pi. | |
76 | */ | |
77 | static BF_ctx BF_init_state = { | |
78 | { | |
79 | { | |
80 | 0xd1310ba6, 0x98dfb5ac, 0x2ffd72db, 0xd01adfb7, | |
81 | 0xb8e1afed, 0x6a267e96, 0xba7c9045, 0xf12c7f99, | |
82 | 0x24a19947, 0xb3916cf7, 0x0801f2e2, 0x858efc16, | |
83 | 0x636920d8, 0x71574e69, 0xa458fea3, 0xf4933d7e, | |
84 | 0x0d95748f, 0x728eb658, 0x718bcd58, 0x82154aee, | |
85 | 0x7b54a41d, 0xc25a59b5, 0x9c30d539, 0x2af26013, | |
86 | 0xc5d1b023, 0x286085f0, 0xca417918, 0xb8db38ef, | |
87 | 0x8e79dcb0, 0x603a180e, 0x6c9e0e8b, 0xb01e8a3e, | |
88 | 0xd71577c1, 0xbd314b27, 0x78af2fda, 0x55605c60, | |
89 | 0xe65525f3, 0xaa55ab94, 0x57489862, 0x63e81440, | |
90 | 0x55ca396a, 0x2aab10b6, 0xb4cc5c34, 0x1141e8ce, | |
91 | 0xa15486af, 0x7c72e993, 0xb3ee1411, 0x636fbc2a, | |
92 | 0x2ba9c55d, 0x741831f6, 0xce5c3e16, 0x9b87931e, | |
93 | 0xafd6ba33, 0x6c24cf5c, 0x7a325381, 0x28958677, | |
94 | 0x3b8f4898, 0x6b4bb9af, 0xc4bfe81b, 0x66282193, | |
95 | 0x61d809cc, 0xfb21a991, 0x487cac60, 0x5dec8032, | |
96 | 0xef845d5d, 0xe98575b1, 0xdc262302, 0xeb651b88, | |
97 | 0x23893e81, 0xd396acc5, 0x0f6d6ff3, 0x83f44239, | |
98 | 0x2e0b4482, 0xa4842004, 0x69c8f04a, 0x9e1f9b5e, | |
99 | 0x21c66842, 0xf6e96c9a, 0x670c9c61, 0xabd388f0, | |
100 | 0x6a51a0d2, 0xd8542f68, 0x960fa728, 0xab5133a3, | |
101 | 0x6eef0b6c, 0x137a3be4, 0xba3bf050, 0x7efb2a98, | |
102 | 0xa1f1651d, 0x39af0176, 0x66ca593e, 0x82430e88, | |
103 | 0x8cee8619, 0x456f9fb4, 0x7d84a5c3, 0x3b8b5ebe, | |
104 | 0xe06f75d8, 0x85c12073, 0x401a449f, 0x56c16aa6, | |
105 | 0x4ed3aa62, 0x363f7706, 0x1bfedf72, 0x429b023d, | |
106 | 0x37d0d724, 0xd00a1248, 0xdb0fead3, 0x49f1c09b, | |
107 | 0x075372c9, 0x80991b7b, 0x25d479d8, 0xf6e8def7, | |
108 | 0xe3fe501a, 0xb6794c3b, 0x976ce0bd, 0x04c006ba, | |
109 | 0xc1a94fb6, 0x409f60c4, 0x5e5c9ec2, 0x196a2463, | |
110 | 0x68fb6faf, 0x3e6c53b5, 0x1339b2eb, 0x3b52ec6f, | |
111 | 0x6dfc511f, 0x9b30952c, 0xcc814544, 0xaf5ebd09, | |
112 | 0xbee3d004, 0xde334afd, 0x660f2807, 0x192e4bb3, | |
113 | 0xc0cba857, 0x45c8740f, 0xd20b5f39, 0xb9d3fbdb, | |
114 | 0x5579c0bd, 0x1a60320a, 0xd6a100c6, 0x402c7279, | |
115 | 0x679f25fe, 0xfb1fa3cc, 0x8ea5e9f8, 0xdb3222f8, | |
116 | 0x3c7516df, 0xfd616b15, 0x2f501ec8, 0xad0552ab, | |
117 | 0x323db5fa, 0xfd238760, 0x53317b48, 0x3e00df82, | |
118 | 0x9e5c57bb, 0xca6f8ca0, 0x1a87562e, 0xdf1769db, | |
119 | 0xd542a8f6, 0x287effc3, 0xac6732c6, 0x8c4f5573, | |
120 | 0x695b27b0, 0xbbca58c8, 0xe1ffa35d, 0xb8f011a0, | |
121 | 0x10fa3d98, 0xfd2183b8, 0x4afcb56c, 0x2dd1d35b, | |
122 | 0x9a53e479, 0xb6f84565, 0xd28e49bc, 0x4bfb9790, | |
123 | 0xe1ddf2da, 0xa4cb7e33, 0x62fb1341, 0xcee4c6e8, | |
124 | 0xef20cada, 0x36774c01, 0xd07e9efe, 0x2bf11fb4, | |
125 | 0x95dbda4d, 0xae909198, 0xeaad8e71, 0x6b93d5a0, | |
126 | 0xd08ed1d0, 0xafc725e0, 0x8e3c5b2f, 0x8e7594b7, | |
127 | 0x8ff6e2fb, 0xf2122b64, 0x8888b812, 0x900df01c, | |
128 | 0x4fad5ea0, 0x688fc31c, 0xd1cff191, 0xb3a8c1ad, | |
129 | 0x2f2f2218, 0xbe0e1777, 0xea752dfe, 0x8b021fa1, | |
130 | 0xe5a0cc0f, 0xb56f74e8, 0x18acf3d6, 0xce89e299, | |
131 | 0xb4a84fe0, 0xfd13e0b7, 0x7cc43b81, 0xd2ada8d9, | |
132 | 0x165fa266, 0x80957705, 0x93cc7314, 0x211a1477, | |
133 | 0xe6ad2065, 0x77b5fa86, 0xc75442f5, 0xfb9d35cf, | |
134 | 0xebcdaf0c, 0x7b3e89a0, 0xd6411bd3, 0xae1e7e49, | |
135 | 0x00250e2d, 0x2071b35e, 0x226800bb, 0x57b8e0af, | |
136 | 0x2464369b, 0xf009b91e, 0x5563911d, 0x59dfa6aa, | |
137 | 0x78c14389, 0xd95a537f, 0x207d5ba2, 0x02e5b9c5, | |
138 | 0x83260376, 0x6295cfa9, 0x11c81968, 0x4e734a41, | |
139 | 0xb3472dca, 0x7b14a94a, 0x1b510052, 0x9a532915, | |
140 | 0xd60f573f, 0xbc9bc6e4, 0x2b60a476, 0x81e67400, | |
141 | 0x08ba6fb5, 0x571be91f, 0xf296ec6b, 0x2a0dd915, | |
142 | 0xb6636521, 0xe7b9f9b6, 0xff34052e, 0xc5855664, | |
143 | 0x53b02d5d, 0xa99f8fa1, 0x08ba4799, 0x6e85076a | |
144 | }, { | |
145 | 0x4b7a70e9, 0xb5b32944, 0xdb75092e, 0xc4192623, | |
146 | 0xad6ea6b0, 0x49a7df7d, 0x9cee60b8, 0x8fedb266, | |
147 | 0xecaa8c71, 0x699a17ff, 0x5664526c, 0xc2b19ee1, | |
148 | 0x193602a5, 0x75094c29, 0xa0591340, 0xe4183a3e, | |
149 | 0x3f54989a, 0x5b429d65, 0x6b8fe4d6, 0x99f73fd6, | |
150 | 0xa1d29c07, 0xefe830f5, 0x4d2d38e6, 0xf0255dc1, | |
151 | 0x4cdd2086, 0x8470eb26, 0x6382e9c6, 0x021ecc5e, | |
152 | 0x09686b3f, 0x3ebaefc9, 0x3c971814, 0x6b6a70a1, | |
153 | 0x687f3584, 0x52a0e286, 0xb79c5305, 0xaa500737, | |
154 | 0x3e07841c, 0x7fdeae5c, 0x8e7d44ec, 0x5716f2b8, | |
155 | 0xb03ada37, 0xf0500c0d, 0xf01c1f04, 0x0200b3ff, | |
156 | 0xae0cf51a, 0x3cb574b2, 0x25837a58, 0xdc0921bd, | |
157 | 0xd19113f9, 0x7ca92ff6, 0x94324773, 0x22f54701, | |
158 | 0x3ae5e581, 0x37c2dadc, 0xc8b57634, 0x9af3dda7, | |
159 | 0xa9446146, 0x0fd0030e, 0xecc8c73e, 0xa4751e41, | |
160 | 0xe238cd99, 0x3bea0e2f, 0x3280bba1, 0x183eb331, | |
161 | 0x4e548b38, 0x4f6db908, 0x6f420d03, 0xf60a04bf, | |
162 | 0x2cb81290, 0x24977c79, 0x5679b072, 0xbcaf89af, | |
163 | 0xde9a771f, 0xd9930810, 0xb38bae12, 0xdccf3f2e, | |
164 | 0x5512721f, 0x2e6b7124, 0x501adde6, 0x9f84cd87, | |
165 | 0x7a584718, 0x7408da17, 0xbc9f9abc, 0xe94b7d8c, | |
166 | 0xec7aec3a, 0xdb851dfa, 0x63094366, 0xc464c3d2, | |
167 | 0xef1c1847, 0x3215d908, 0xdd433b37, 0x24c2ba16, | |
168 | 0x12a14d43, 0x2a65c451, 0x50940002, 0x133ae4dd, | |
169 | 0x71dff89e, 0x10314e55, 0x81ac77d6, 0x5f11199b, | |
170 | 0x043556f1, 0xd7a3c76b, 0x3c11183b, 0x5924a509, | |
171 | 0xf28fe6ed, 0x97f1fbfa, 0x9ebabf2c, 0x1e153c6e, | |
172 | 0x86e34570, 0xeae96fb1, 0x860e5e0a, 0x5a3e2ab3, | |
173 | 0x771fe71c, 0x4e3d06fa, 0x2965dcb9, 0x99e71d0f, | |
174 | 0x803e89d6, 0x5266c825, 0x2e4cc978, 0x9c10b36a, | |
175 | 0xc6150eba, 0x94e2ea78, 0xa5fc3c53, 0x1e0a2df4, | |
176 | 0xf2f74ea7, 0x361d2b3d, 0x1939260f, 0x19c27960, | |
177 | 0x5223a708, 0xf71312b6, 0xebadfe6e, 0xeac31f66, | |
178 | 0xe3bc4595, 0xa67bc883, 0xb17f37d1, 0x018cff28, | |
179 | 0xc332ddef, 0xbe6c5aa5, 0x65582185, 0x68ab9802, | |
180 | 0xeecea50f, 0xdb2f953b, 0x2aef7dad, 0x5b6e2f84, | |
181 | 0x1521b628, 0x29076170, 0xecdd4775, 0x619f1510, | |
182 | 0x13cca830, 0xeb61bd96, 0x0334fe1e, 0xaa0363cf, | |
183 | 0xb5735c90, 0x4c70a239, 0xd59e9e0b, 0xcbaade14, | |
184 | 0xeecc86bc, 0x60622ca7, 0x9cab5cab, 0xb2f3846e, | |
185 | 0x648b1eaf, 0x19bdf0ca, 0xa02369b9, 0x655abb50, | |
186 | 0x40685a32, 0x3c2ab4b3, 0x319ee9d5, 0xc021b8f7, | |
187 | 0x9b540b19, 0x875fa099, 0x95f7997e, 0x623d7da8, | |
188 | 0xf837889a, 0x97e32d77, 0x11ed935f, 0x16681281, | |
189 | 0x0e358829, 0xc7e61fd6, 0x96dedfa1, 0x7858ba99, | |
190 | 0x57f584a5, 0x1b227263, 0x9b83c3ff, 0x1ac24696, | |
191 | 0xcdb30aeb, 0x532e3054, 0x8fd948e4, 0x6dbc3128, | |
192 | 0x58ebf2ef, 0x34c6ffea, 0xfe28ed61, 0xee7c3c73, | |
193 | 0x5d4a14d9, 0xe864b7e3, 0x42105d14, 0x203e13e0, | |
194 | 0x45eee2b6, 0xa3aaabea, 0xdb6c4f15, 0xfacb4fd0, | |
195 | 0xc742f442, 0xef6abbb5, 0x654f3b1d, 0x41cd2105, | |
196 | 0xd81e799e, 0x86854dc7, 0xe44b476a, 0x3d816250, | |
197 | 0xcf62a1f2, 0x5b8d2646, 0xfc8883a0, 0xc1c7b6a3, | |
198 | 0x7f1524c3, 0x69cb7492, 0x47848a0b, 0x5692b285, | |
199 | 0x095bbf00, 0xad19489d, 0x1462b174, 0x23820e00, | |
200 | 0x58428d2a, 0x0c55f5ea, 0x1dadf43e, 0x233f7061, | |
201 | 0x3372f092, 0x8d937e41, 0xd65fecf1, 0x6c223bdb, | |
202 | 0x7cde3759, 0xcbee7460, 0x4085f2a7, 0xce77326e, | |
203 | 0xa6078084, 0x19f8509e, 0xe8efd855, 0x61d99735, | |
204 | 0xa969a7aa, 0xc50c06c2, 0x5a04abfc, 0x800bcadc, | |
205 | 0x9e447a2e, 0xc3453484, 0xfdd56705, 0x0e1e9ec9, | |
206 | 0xdb73dbd3, 0x105588cd, 0x675fda79, 0xe3674340, | |
207 | 0xc5c43465, 0x713e38d8, 0x3d28f89e, 0xf16dff20, | |
208 | 0x153e21e7, 0x8fb03d4a, 0xe6e39f2b, 0xdb83adf7 | |
209 | }, { | |
210 | 0xe93d5a68, 0x948140f7, 0xf64c261c, 0x94692934, | |
211 | 0x411520f7, 0x7602d4f7, 0xbcf46b2e, 0xd4a20068, | |
212 | 0xd4082471, 0x3320f46a, 0x43b7d4b7, 0x500061af, | |
213 | 0x1e39f62e, 0x97244546, 0x14214f74, 0xbf8b8840, | |
214 | 0x4d95fc1d, 0x96b591af, 0x70f4ddd3, 0x66a02f45, | |
215 | 0xbfbc09ec, 0x03bd9785, 0x7fac6dd0, 0x31cb8504, | |
216 | 0x96eb27b3, 0x55fd3941, 0xda2547e6, 0xabca0a9a, | |
217 | 0x28507825, 0x530429f4, 0x0a2c86da, 0xe9b66dfb, | |
218 | 0x68dc1462, 0xd7486900, 0x680ec0a4, 0x27a18dee, | |
219 | 0x4f3ffea2, 0xe887ad8c, 0xb58ce006, 0x7af4d6b6, | |
220 | 0xaace1e7c, 0xd3375fec, 0xce78a399, 0x406b2a42, | |
221 | 0x20fe9e35, 0xd9f385b9, 0xee39d7ab, 0x3b124e8b, | |
222 | 0x1dc9faf7, 0x4b6d1856, 0x26a36631, 0xeae397b2, | |
223 | 0x3a6efa74, 0xdd5b4332, 0x6841e7f7, 0xca7820fb, | |
224 | 0xfb0af54e, 0xd8feb397, 0x454056ac, 0xba489527, | |
225 | 0x55533a3a, 0x20838d87, 0xfe6ba9b7, 0xd096954b, | |
226 | 0x55a867bc, 0xa1159a58, 0xcca92963, 0x99e1db33, | |
227 | 0xa62a4a56, 0x3f3125f9, 0x5ef47e1c, 0x9029317c, | |
228 | 0xfdf8e802, 0x04272f70, 0x80bb155c, 0x05282ce3, | |
229 | 0x95c11548, 0xe4c66d22, 0x48c1133f, 0xc70f86dc, | |
230 | 0x07f9c9ee, 0x41041f0f, 0x404779a4, 0x5d886e17, | |
231 | 0x325f51eb, 0xd59bc0d1, 0xf2bcc18f, 0x41113564, | |
232 | 0x257b7834, 0x602a9c60, 0xdff8e8a3, 0x1f636c1b, | |
233 | 0x0e12b4c2, 0x02e1329e, 0xaf664fd1, 0xcad18115, | |
234 | 0x6b2395e0, 0x333e92e1, 0x3b240b62, 0xeebeb922, | |
235 | 0x85b2a20e, 0xe6ba0d99, 0xde720c8c, 0x2da2f728, | |
236 | 0xd0127845, 0x95b794fd, 0x647d0862, 0xe7ccf5f0, | |
237 | 0x5449a36f, 0x877d48fa, 0xc39dfd27, 0xf33e8d1e, | |
238 | 0x0a476341, 0x992eff74, 0x3a6f6eab, 0xf4f8fd37, | |
239 | 0xa812dc60, 0xa1ebddf8, 0x991be14c, 0xdb6e6b0d, | |
240 | 0xc67b5510, 0x6d672c37, 0x2765d43b, 0xdcd0e804, | |
241 | 0xf1290dc7, 0xcc00ffa3, 0xb5390f92, 0x690fed0b, | |
242 | 0x667b9ffb, 0xcedb7d9c, 0xa091cf0b, 0xd9155ea3, | |
243 | 0xbb132f88, 0x515bad24, 0x7b9479bf, 0x763bd6eb, | |
244 | 0x37392eb3, 0xcc115979, 0x8026e297, 0xf42e312d, | |
245 | 0x6842ada7, 0xc66a2b3b, 0x12754ccc, 0x782ef11c, | |
246 | 0x6a124237, 0xb79251e7, 0x06a1bbe6, 0x4bfb6350, | |
247 | 0x1a6b1018, 0x11caedfa, 0x3d25bdd8, 0xe2e1c3c9, | |
248 | 0x44421659, 0x0a121386, 0xd90cec6e, 0xd5abea2a, | |
249 | 0x64af674e, 0xda86a85f, 0xbebfe988, 0x64e4c3fe, | |
250 | 0x9dbc8057, 0xf0f7c086, 0x60787bf8, 0x6003604d, | |
251 | 0xd1fd8346, 0xf6381fb0, 0x7745ae04, 0xd736fccc, | |
252 | 0x83426b33, 0xf01eab71, 0xb0804187, 0x3c005e5f, | |
253 | 0x77a057be, 0xbde8ae24, 0x55464299, 0xbf582e61, | |
254 | 0x4e58f48f, 0xf2ddfda2, 0xf474ef38, 0x8789bdc2, | |
255 | 0x5366f9c3, 0xc8b38e74, 0xb475f255, 0x46fcd9b9, | |
256 | 0x7aeb2661, 0x8b1ddf84, 0x846a0e79, 0x915f95e2, | |
257 | 0x466e598e, 0x20b45770, 0x8cd55591, 0xc902de4c, | |
258 | 0xb90bace1, 0xbb8205d0, 0x11a86248, 0x7574a99e, | |
259 | 0xb77f19b6, 0xe0a9dc09, 0x662d09a1, 0xc4324633, | |
260 | 0xe85a1f02, 0x09f0be8c, 0x4a99a025, 0x1d6efe10, | |
261 | 0x1ab93d1d, 0x0ba5a4df, 0xa186f20f, 0x2868f169, | |
262 | 0xdcb7da83, 0x573906fe, 0xa1e2ce9b, 0x4fcd7f52, | |
263 | 0x50115e01, 0xa70683fa, 0xa002b5c4, 0x0de6d027, | |
264 | 0x9af88c27, 0x773f8641, 0xc3604c06, 0x61a806b5, | |
265 | 0xf0177a28, 0xc0f586e0, 0x006058aa, 0x30dc7d62, | |
266 | 0x11e69ed7, 0x2338ea63, 0x53c2dd94, 0xc2c21634, | |
267 | 0xbbcbee56, 0x90bcb6de, 0xebfc7da1, 0xce591d76, | |
268 | 0x6f05e409, 0x4b7c0188, 0x39720a3d, 0x7c927c24, | |
269 | 0x86e3725f, 0x724d9db9, 0x1ac15bb4, 0xd39eb8fc, | |
270 | 0xed545578, 0x08fca5b5, 0xd83d7cd3, 0x4dad0fc4, | |
271 | 0x1e50ef5e, 0xb161e6f8, 0xa28514d9, 0x6c51133c, | |
272 | 0x6fd5c7e7, 0x56e14ec4, 0x362abfce, 0xddc6c837, | |
273 | 0xd79a3234, 0x92638212, 0x670efa8e, 0x406000e0 | |
274 | }, { | |
275 | 0x3a39ce37, 0xd3faf5cf, 0xabc27737, 0x5ac52d1b, | |
276 | 0x5cb0679e, 0x4fa33742, 0xd3822740, 0x99bc9bbe, | |
277 | 0xd5118e9d, 0xbf0f7315, 0xd62d1c7e, 0xc700c47b, | |
278 | 0xb78c1b6b, 0x21a19045, 0xb26eb1be, 0x6a366eb4, | |
279 | 0x5748ab2f, 0xbc946e79, 0xc6a376d2, 0x6549c2c8, | |
280 | 0x530ff8ee, 0x468dde7d, 0xd5730a1d, 0x4cd04dc6, | |
281 | 0x2939bbdb, 0xa9ba4650, 0xac9526e8, 0xbe5ee304, | |
282 | 0xa1fad5f0, 0x6a2d519a, 0x63ef8ce2, 0x9a86ee22, | |
283 | 0xc089c2b8, 0x43242ef6, 0xa51e03aa, 0x9cf2d0a4, | |
284 | 0x83c061ba, 0x9be96a4d, 0x8fe51550, 0xba645bd6, | |
285 | 0x2826a2f9, 0xa73a3ae1, 0x4ba99586, 0xef5562e9, | |
286 | 0xc72fefd3, 0xf752f7da, 0x3f046f69, 0x77fa0a59, | |
287 | 0x80e4a915, 0x87b08601, 0x9b09e6ad, 0x3b3ee593, | |
288 | 0xe990fd5a, 0x9e34d797, 0x2cf0b7d9, 0x022b8b51, | |
289 | 0x96d5ac3a, 0x017da67d, 0xd1cf3ed6, 0x7c7d2d28, | |
290 | 0x1f9f25cf, 0xadf2b89b, 0x5ad6b472, 0x5a88f54c, | |
291 | 0xe029ac71, 0xe019a5e6, 0x47b0acfd, 0xed93fa9b, | |
292 | 0xe8d3c48d, 0x283b57cc, 0xf8d56629, 0x79132e28, | |
293 | 0x785f0191, 0xed756055, 0xf7960e44, 0xe3d35e8c, | |
294 | 0x15056dd4, 0x88f46dba, 0x03a16125, 0x0564f0bd, | |
295 | 0xc3eb9e15, 0x3c9057a2, 0x97271aec, 0xa93a072a, | |
296 | 0x1b3f6d9b, 0x1e6321f5, 0xf59c66fb, 0x26dcf319, | |
297 | 0x7533d928, 0xb155fdf5, 0x03563482, 0x8aba3cbb, | |
298 | 0x28517711, 0xc20ad9f8, 0xabcc5167, 0xccad925f, | |
299 | 0x4de81751, 0x3830dc8e, 0x379d5862, 0x9320f991, | |
300 | 0xea7a90c2, 0xfb3e7bce, 0x5121ce64, 0x774fbe32, | |
301 | 0xa8b6e37e, 0xc3293d46, 0x48de5369, 0x6413e680, | |
302 | 0xa2ae0810, 0xdd6db224, 0x69852dfd, 0x09072166, | |
303 | 0xb39a460a, 0x6445c0dd, 0x586cdecf, 0x1c20c8ae, | |
304 | 0x5bbef7dd, 0x1b588d40, 0xccd2017f, 0x6bb4e3bb, | |
305 | 0xdda26a7e, 0x3a59ff45, 0x3e350a44, 0xbcb4cdd5, | |
306 | 0x72eacea8, 0xfa6484bb, 0x8d6612ae, 0xbf3c6f47, | |
307 | 0xd29be463, 0x542f5d9e, 0xaec2771b, 0xf64e6370, | |
308 | 0x740e0d8d, 0xe75b1357, 0xf8721671, 0xaf537d5d, | |
309 | 0x4040cb08, 0x4eb4e2cc, 0x34d2466a, 0x0115af84, | |
310 | 0xe1b00428, 0x95983a1d, 0x06b89fb4, 0xce6ea048, | |
311 | 0x6f3f3b82, 0x3520ab82, 0x011a1d4b, 0x277227f8, | |
312 | 0x611560b1, 0xe7933fdc, 0xbb3a792b, 0x344525bd, | |
313 | 0xa08839e1, 0x51ce794b, 0x2f32c9b7, 0xa01fbac9, | |
314 | 0xe01cc87e, 0xbcc7d1f6, 0xcf0111c3, 0xa1e8aac7, | |
315 | 0x1a908749, 0xd44fbd9a, 0xd0dadecb, 0xd50ada38, | |
316 | 0x0339c32a, 0xc6913667, 0x8df9317c, 0xe0b12b4f, | |
317 | 0xf79e59b7, 0x43f5bb3a, 0xf2d519ff, 0x27d9459c, | |
318 | 0xbf97222c, 0x15e6fc2a, 0x0f91fc71, 0x9b941525, | |
319 | 0xfae59361, 0xceb69ceb, 0xc2a86459, 0x12baa8d1, | |
320 | 0xb6c1075e, 0xe3056a0c, 0x10d25065, 0xcb03a442, | |
321 | 0xe0ec6e0e, 0x1698db3b, 0x4c98a0be, 0x3278e964, | |
322 | 0x9f1f9532, 0xe0d392df, 0xd3a0342b, 0x8971f21e, | |
323 | 0x1b0a7441, 0x4ba3348c, 0xc5be7120, 0xc37632d8, | |
324 | 0xdf359f8d, 0x9b992f2e, 0xe60b6f47, 0x0fe3f11d, | |
325 | 0xe54cda54, 0x1edad891, 0xce6279cf, 0xcd3e7e6f, | |
326 | 0x1618b166, 0xfd2c1d05, 0x848fd2c5, 0xf6fb2299, | |
327 | 0xf523f357, 0xa6327623, 0x93a83531, 0x56cccd02, | |
328 | 0xacf08162, 0x5a75ebb5, 0x6e163697, 0x88d273cc, | |
329 | 0xde966292, 0x81b949d0, 0x4c50901b, 0x71c65614, | |
330 | 0xe6c6c7bd, 0x327a140a, 0x45e1d006, 0xc3f27b9a, | |
331 | 0xc9aa53fd, 0x62a80f00, 0xbb25bfe2, 0x35bdd2f6, | |
332 | 0x71126905, 0xb2040222, 0xb6cbcf7c, 0xcd769c2b, | |
333 | 0x53113ec0, 0x1640e3d3, 0x38abbd60, 0x2547adf0, | |
334 | 0xba38209c, 0xf746ce76, 0x77afa1c5, 0x20756060, | |
335 | 0x85cbfe4e, 0x8ae88dd8, 0x7aaaf9b0, 0x4cf9aa7e, | |
336 | 0x1948c25c, 0x02fb8a8c, 0x01c36ae4, 0xd6ebe1f9, | |
337 | 0x90d4f869, 0xa65cdea0, 0x3f09252d, 0xc208e69f, | |
338 | 0xb74e6132, 0xce77e25b, 0x578fdfe3, 0x3ac372e6 | |
339 | } | |
340 | }, { | |
341 | 0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344, | |
342 | 0xa4093822, 0x299f31d0, 0x082efa98, 0xec4e6c89, | |
343 | 0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c, | |
344 | 0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917, | |
345 | 0x9216d5d9, 0x8979fb1b | |
346 | } | |
347 | }; | |
348 | ||
349 | static unsigned char BF_itoa64[64 + 1] = | |
350 | "./ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; | |
351 | ||
352 | static unsigned char BF_atoi64[0x60] = { | |
353 | 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 0, 1, | |
354 | 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 64, 64, 64, 64, 64, | |
355 | 64, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, | |
356 | 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 64, 64, 64, 64, 64, | |
357 | 64, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, | |
358 | 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 64, 64, 64, 64, 64 | |
359 | }; | |
360 | ||
361 | #define BF_safe_atoi64(dst, src) \ | |
362 | { \ | |
363 | tmp = (unsigned char)(src); \ | |
364 | if ((unsigned int)(tmp -= 0x20) >= 0x60) return -1; \ | |
365 | tmp = BF_atoi64[tmp]; \ | |
366 | if (tmp > 63) return -1; \ | |
367 | (dst) = tmp; \ | |
368 | } | |
369 | ||
370 | static int BF_decode(BF_word *dst, const char *src, int size) | |
371 | { | |
372 | unsigned char *dptr = (unsigned char *)dst; | |
373 | unsigned char *end = dptr + size; | |
374 | const unsigned char *sptr = (const unsigned char *)src; | |
375 | unsigned int tmp, c1, c2, c3, c4; | |
376 | ||
377 | do { | |
378 | BF_safe_atoi64(c1, *sptr++); | |
379 | BF_safe_atoi64(c2, *sptr++); | |
380 | *dptr++ = (c1 << 2) | ((c2 & 0x30) >> 4); | |
381 | if (dptr >= end) break; | |
382 | ||
383 | BF_safe_atoi64(c3, *sptr++); | |
384 | *dptr++ = ((c2 & 0x0F) << 4) | ((c3 & 0x3C) >> 2); | |
385 | if (dptr >= end) break; | |
386 | ||
387 | BF_safe_atoi64(c4, *sptr++); | |
388 | *dptr++ = ((c3 & 0x03) << 6) | c4; | |
389 | } while (dptr < end); | |
390 | ||
391 | return 0; | |
392 | } | |
393 | ||
394 | static void BF_encode(char *dst, const BF_word *src, int size) | |
395 | { | |
396 | const unsigned char *sptr = (const unsigned char *)src; | |
397 | const unsigned char *end = sptr + size; | |
398 | unsigned char *dptr = (unsigned char *)dst; | |
399 | unsigned int c1, c2; | |
400 | ||
401 | do { | |
402 | c1 = *sptr++; | |
403 | *dptr++ = BF_itoa64[c1 >> 2]; | |
404 | c1 = (c1 & 0x03) << 4; | |
405 | if (sptr >= end) { | |
406 | *dptr++ = BF_itoa64[c1]; | |
407 | break; | |
408 | } | |
409 | ||
410 | c2 = *sptr++; | |
411 | c1 |= c2 >> 4; | |
412 | *dptr++ = BF_itoa64[c1]; | |
413 | c1 = (c2 & 0x0f) << 2; | |
414 | if (sptr >= end) { | |
415 | *dptr++ = BF_itoa64[c1]; | |
416 | break; | |
417 | } | |
418 | ||
419 | c2 = *sptr++; | |
420 | c1 |= c2 >> 6; | |
421 | *dptr++ = BF_itoa64[c1]; | |
422 | *dptr++ = BF_itoa64[c2 & 0x3f]; | |
423 | } while (sptr < end); | |
424 | } | |
425 | ||
426 | static void BF_swap(BF_word *x, int count) | |
427 | { | |
428 | static int endianness_check = 1; | |
429 | char *is_little_endian = (char *)&endianness_check; | |
430 | BF_word tmp; | |
431 | ||
432 | if (*is_little_endian) | |
433 | do { | |
434 | tmp = *x; | |
435 | tmp = (tmp << 16) | (tmp >> 16); | |
436 | *x++ = ((tmp & 0x00FF00FF) << 8) | ((tmp >> 8) & 0x00FF00FF); | |
437 | } while (--count); | |
438 | } | |
439 | ||
440 | /* Architectures which can shift addresses left by 2 bits with no extra cost */ | |
441 | #define BF_ROUND(L, R, N) \ | |
442 | tmp1 = L & 0xFF; \ | |
443 | tmp2 = L >> 8; \ | |
444 | tmp2 &= 0xFF; \ | |
445 | tmp3 = L >> 16; \ | |
446 | tmp3 &= 0xFF; \ | |
447 | tmp4 = L >> 24; \ | |
448 | tmp1 = data.ctx.S[3][tmp1]; \ | |
449 | tmp2 = data.ctx.S[2][tmp2]; \ | |
450 | tmp3 = data.ctx.S[1][tmp3]; \ | |
451 | tmp3 += data.ctx.S[0][tmp4]; \ | |
452 | tmp3 ^= tmp2; \ | |
453 | R ^= data.ctx.P[N + 1]; \ | |
454 | tmp3 += tmp1; \ | |
455 | R ^= tmp3; | |
456 | ||
457 | /* | |
458 | * Encrypt one block, BF_N is hardcoded here. | |
459 | */ | |
460 | #define BF_ENCRYPT \ | |
461 | L ^= data.ctx.P[0]; \ | |
462 | BF_ROUND(L, R, 0); \ | |
463 | BF_ROUND(R, L, 1); \ | |
464 | BF_ROUND(L, R, 2); \ | |
465 | BF_ROUND(R, L, 3); \ | |
466 | BF_ROUND(L, R, 4); \ | |
467 | BF_ROUND(R, L, 5); \ | |
468 | BF_ROUND(L, R, 6); \ | |
469 | BF_ROUND(R, L, 7); \ | |
470 | BF_ROUND(L, R, 8); \ | |
471 | BF_ROUND(R, L, 9); \ | |
472 | BF_ROUND(L, R, 10); \ | |
473 | BF_ROUND(R, L, 11); \ | |
474 | BF_ROUND(L, R, 12); \ | |
475 | BF_ROUND(R, L, 13); \ | |
476 | BF_ROUND(L, R, 14); \ | |
477 | BF_ROUND(R, L, 15); \ | |
478 | tmp4 = R; \ | |
479 | R = L; \ | |
480 | L = tmp4 ^ data.ctx.P[BF_N + 1]; | |
481 | ||
482 | #define BF_body() \ | |
483 | L = R = 0; \ | |
484 | ptr = data.ctx.P; \ | |
485 | do { \ | |
486 | ptr += 2; \ | |
487 | BF_ENCRYPT; \ | |
488 | *(ptr - 2) = L; \ | |
489 | *(ptr - 1) = R; \ | |
490 | } while (ptr < &data.ctx.P[BF_N + 2]); \ | |
491 | \ | |
492 | ptr = data.ctx.S[0]; \ | |
493 | do { \ | |
494 | ptr += 2; \ | |
495 | BF_ENCRYPT; \ | |
496 | *(ptr - 2) = L; \ | |
497 | *(ptr - 1) = R; \ | |
498 | } while (ptr < &data.ctx.S[3][0xFF]); | |
499 | ||
500 | static void BF_set_key(const char *key, BF_key expanded, BF_key initial, | |
501 | unsigned char flags) | |
502 | { | |
503 | const char *ptr = key; | |
504 | unsigned int bug, i, j; | |
505 | BF_word safety, sign, diff, tmp[2]; | |
506 | ||
507 | /* | |
508 | * There was a sign extension bug in older revisions of this function. While | |
509 | * we would have liked to simply fix the bug and move on, we have to provide | |
510 | * a backwards compatibility feature (essentially the bug) for some systems and | |
511 | * a safety measure for some others. The latter is needed because for certain | |
512 | * multiple inputs to the buggy algorithm there exist easily found inputs to | |
513 | * the correct algorithm that produce the same hash. Thus, we optionally | |
514 | * deviate from the correct algorithm just enough to avoid such collisions. | |
515 | * While the bug itself affected the majority of passwords containing | |
516 | * characters with the 8th bit set (although only a percentage of those in a | |
517 | * collision-producing way), the anti-collision safety measure affects | |
518 | * only a subset of passwords containing the '\xff' character (not even all of | |
519 | * those passwords, just some of them). This character is not found in valid | |
520 | * UTF-8 sequences and is rarely used in popular 8-bit character encodings. | |
521 | * Thus, the safety measure is unlikely to cause much annoyance, and is a | |
522 | * reasonable tradeoff to use when authenticating against existing hashes that | |
523 | * are not reliably known to have been computed with the correct algorithm. | |
524 | * | |
525 | * We use an approach that tries to minimize side-channel leaks of password | |
526 | * information - that is, we mostly use fixed-cost bitwise operations instead | |
527 | * of branches or table lookups. (One conditional branch based on password | |
528 | * length remains. It is not part of the bug aftermath, though, and is | |
529 | * difficult and possibly unreasonable to avoid given the use of C strings by | |
530 | * the caller, which results in similar timing leaks anyway.) | |
531 | * | |
532 | * For actual implementation, we set an array index in the variable "bug" | |
533 | * (0 means no bug, 1 means sign extension bug emulation) and a flag in the | |
534 | * variable "safety" (bit 16 is set when the safety measure is requested). | |
535 | * Valid combinations of settings are: | |
536 | * | |
537 | * Prefix "$2a$": bug = 0, safety = 0x10000 | |
538 | * Prefix "$2x$": bug = 1, safety = 0 | |
539 | * Prefix "$2y$": bug = 0, safety = 0 | |
540 | */ | |
541 | bug = (unsigned int)flags & 1; | |
542 | safety = ((BF_word)flags & 2) << 15; | |
543 | ||
544 | sign = diff = 0; | |
545 | ||
546 | for (i = 0; i < BF_N + 2; i++) { | |
547 | tmp[0] = tmp[1] = 0; | |
548 | for (j = 0; j < 4; j++) { | |
549 | tmp[0] <<= 8; | |
550 | tmp[0] |= (unsigned char)*ptr; /* correct */ | |
551 | tmp[1] <<= 8; | |
552 | tmp[1] |= (BF_word_signed)(signed char)*ptr; /* bug */ | |
553 | /* | |
554 | * Sign extension in the first char has no effect - nothing to overwrite yet, | |
555 | * and those extra 24 bits will be fully shifted out of the 32-bit word. For | |
556 | * chars 2, 3, 4 in each four-char block, we set bit 7 of "sign" if sign | |
557 | * extension in tmp[1] occurs. Once this flag is set, it remains set. | |
558 | */ | |
559 | if (j) | |
560 | sign |= tmp[1] & 0x80; | |
561 | if (!*ptr) | |
562 | ptr = key; | |
563 | else | |
564 | ptr++; | |
565 | } | |
566 | diff |= tmp[0] ^ tmp[1]; /* Non-zero on any differences */ | |
567 | ||
568 | expanded[i] = tmp[bug]; | |
569 | initial[i] = BF_init_state.P[i] ^ tmp[bug]; | |
570 | } | |
571 | ||
572 | /* | |
573 | * At this point, "diff" is zero iff the correct and buggy algorithms produced | |
574 | * exactly the same result. If so and if "sign" is non-zero, which indicates | |
575 | * that there was a non-benign sign extension, this means that we have a | |
576 | * collision between the correctly computed hash for this password and a set of | |
577 | * passwords that could be supplied to the buggy algorithm. Our safety measure | |
578 | * is meant to protect from such many-buggy to one-correct collisions, by | |
579 | * deviating from the correct algorithm in such cases. Let's check for this. | |
580 | */ | |
581 | diff |= diff >> 16; /* still zero iff exact match */ | |
582 | diff &= 0xffff; /* ditto */ | |
583 | diff += 0xffff; /* bit 16 set iff "diff" was non-zero (on non-match) */ | |
584 | sign <<= 9; /* move the non-benign sign extension flag to bit 16 */ | |
585 | sign &= ~diff & safety; /* action needed? */ | |
586 | ||
587 | /* | |
588 | * If we have determined that we need to deviate from the correct algorithm, | |
589 | * flip bit 16 in initial expanded key. (The choice of 16 is arbitrary, but | |
590 | * let's stick to it now. It came out of the approach we used above, and it's | |
591 | * not any worse than any other choice we could make.) | |
592 | * | |
593 | * It is crucial that we don't do the same to the expanded key used in the main | |
594 | * Eksblowfish loop. By doing it to only one of these two, we deviate from a | |
595 | * state that could be directly specified by a password to the buggy algorithm | |
596 | * (and to the fully correct one as well, but that's a side-effect). | |
597 | */ | |
598 | initial[0] ^= sign; | |
599 | } | |
600 | ||
601 | static char *BF_crypt(const char *key, const char *setting, | |
602 | char *output, int size, | |
603 | BF_word min) | |
604 | { | |
605 | static const unsigned char flags_by_subtype[26] = | |
606 | {2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
607 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 4, 0}; | |
608 | struct { | |
609 | BF_ctx ctx; | |
610 | BF_key expanded_key; | |
611 | union { | |
612 | BF_word salt[4]; | |
613 | BF_word output[6]; | |
614 | } binary; | |
615 | } data; | |
616 | BF_word L, R; | |
617 | BF_word tmp1, tmp2, tmp3, tmp4; | |
618 | BF_word *ptr; | |
619 | BF_word count; | |
620 | int i; | |
621 | ||
622 | if (size < 7 + 22 + 31 + 1) { | |
623 | return NULL; | |
624 | } | |
625 | ||
626 | if (setting[0] != '$' || | |
627 | setting[1] != '2' || | |
628 | setting[2] < 'a' || setting[2] > 'z' || | |
629 | !flags_by_subtype[(unsigned int)(unsigned char)setting[2] - 'a'] || | |
630 | setting[3] != '$' || | |
631 | setting[4] < '0' || setting[4] > '3' || | |
632 | setting[5] < '0' || setting[5] > '9' || | |
633 | (setting[4] == '3' && setting[5] > '1') || | |
634 | setting[6] != '$') { | |
635 | return NULL; | |
636 | } | |
637 | ||
638 | count = (BF_word)1 << ((setting[4] - '0') * 10 + (setting[5] - '0')); | |
639 | if (count < min || BF_decode(data.binary.salt, &setting[7], 16)) { | |
640 | return NULL; | |
641 | } | |
642 | BF_swap(data.binary.salt, 4); | |
643 | ||
644 | BF_set_key(key, data.expanded_key, data.ctx.P, | |
645 | flags_by_subtype[(unsigned int)(unsigned char)setting[2] - 'a']); | |
646 | ||
647 | CopyMem(data.ctx.S, BF_init_state.S, sizeof(data.ctx.S)); | |
648 | ||
649 | L = R = 0; | |
650 | for (i = 0; i < BF_N + 2; i += 2) { | |
651 | L ^= data.binary.salt[i & 2]; | |
652 | R ^= data.binary.salt[(i & 2) + 1]; | |
653 | BF_ENCRYPT; | |
654 | data.ctx.P[i] = L; | |
655 | data.ctx.P[i + 1] = R; | |
656 | } | |
657 | ||
658 | ptr = data.ctx.S[0]; | |
659 | do { | |
660 | ptr += 4; | |
661 | L ^= data.binary.salt[(BF_N + 2) & 3]; | |
662 | R ^= data.binary.salt[(BF_N + 3) & 3]; | |
663 | BF_ENCRYPT; | |
664 | *(ptr - 4) = L; | |
665 | *(ptr - 3) = R; | |
666 | ||
667 | L ^= data.binary.salt[(BF_N + 4) & 3]; | |
668 | R ^= data.binary.salt[(BF_N + 5) & 3]; | |
669 | BF_ENCRYPT; | |
670 | *(ptr - 2) = L; | |
671 | *(ptr - 1) = R; | |
672 | } while (ptr < &data.ctx.S[3][0xFF]); | |
673 | ||
674 | do { | |
675 | int done; | |
676 | ||
677 | for (i = 0; i < BF_N + 2; i += 2) { | |
678 | data.ctx.P[i] ^= data.expanded_key[i]; | |
679 | data.ctx.P[i + 1] ^= data.expanded_key[i + 1]; | |
680 | } | |
681 | ||
682 | done = 0; | |
683 | do { | |
684 | BF_body(); | |
685 | if (done) | |
686 | break; | |
687 | done = 1; | |
688 | ||
689 | tmp1 = data.binary.salt[0]; | |
690 | tmp2 = data.binary.salt[1]; | |
691 | tmp3 = data.binary.salt[2]; | |
692 | tmp4 = data.binary.salt[3]; | |
693 | for (i = 0; i < BF_N; i += 4) { | |
694 | data.ctx.P[i] ^= tmp1; | |
695 | data.ctx.P[i + 1] ^= tmp2; | |
696 | data.ctx.P[i + 2] ^= tmp3; | |
697 | data.ctx.P[i + 3] ^= tmp4; | |
698 | } | |
699 | data.ctx.P[16] ^= tmp1; | |
700 | data.ctx.P[17] ^= tmp2; | |
701 | } while (1); | |
702 | } while (--count); | |
703 | ||
704 | for (i = 0; i < 6; i += 2) { | |
705 | L = BF_magic_w[i]; | |
706 | R = BF_magic_w[i + 1]; | |
707 | ||
708 | count = 64; | |
709 | do { | |
710 | BF_ENCRYPT; | |
711 | } while (--count); | |
712 | ||
713 | data.binary.output[i] = L; | |
714 | data.binary.output[i + 1] = R; | |
715 | } | |
716 | ||
717 | CopyMem(output, (void *)setting, 7 + 22 - 1); | |
718 | output[7 + 22 - 1] = BF_itoa64[(int) | |
719 | BF_atoi64[(int)setting[7 + 22 - 1] - 0x20] & 0x30]; | |
720 | ||
721 | /* This has to be bug-compatible with the original implementation, so | |
722 | * only encode 23 of the 24 bytes. :-) */ | |
723 | BF_swap(data.binary.output, 6); | |
724 | BF_encode(&output[7 + 22], data.binary.output, 23); | |
725 | output[7 + 22 + 31] = '\0'; | |
726 | ||
727 | return output; | |
728 | } | |
729 | ||
730 | int _crypt_output_magic(const char *setting, char *output, int size) | |
731 | { | |
732 | if (size < 3) | |
733 | return -1; | |
734 | ||
735 | output[0] = '*'; | |
736 | output[1] = '0'; | |
737 | output[2] = '\0'; | |
738 | ||
739 | if (setting[0] == '*' && setting[1] == '0') | |
740 | output[1] = '1'; | |
741 | ||
742 | return 0; | |
743 | } | |
744 | ||
745 | /* | |
746 | * Please preserve the runtime self-test. It serves two purposes at once: | |
747 | * | |
748 | * 1. We really can't afford the risk of producing incompatible hashes e.g. | |
749 | * when there's something like gcc bug 26587 again, whereas an application or | |
750 | * library integrating this code might not also integrate our external tests or | |
751 | * it might not run them after every build. Even if it does, the miscompile | |
752 | * might only occur on the production build, but not on a testing build (such | |
753 | * as because of different optimization settings). It is painful to recover | |
754 | * from incorrectly-computed hashes - merely fixing whatever broke is not | |
755 | * enough. Thus, a proactive measure like this self-test is needed. | |
756 | * | |
757 | * 2. We don't want to leave sensitive data from our actual password hash | |
758 | * computation on the stack or in registers. Previous revisions of the code | |
759 | * would do explicit cleanups, but simply running the self-test after hash | |
760 | * computation is more reliable. | |
761 | * | |
762 | * The performance cost of this quick self-test is around 0.6% at the "$2a$08" | |
763 | * setting. | |
764 | */ | |
765 | char *crypt_blowfish_rn(const char *key, const char *setting, | |
766 | char *output, int size) | |
767 | { | |
768 | const char *test_key = "8b \xd0\xc1\xd2\xcf\xcc\xd8"; | |
769 | const char *test_setting = "$2a$00$abcdefghijklmnopqrstuu"; | |
770 | static const char * const test_hash[2] = | |
771 | {"VUrPmXD6q/nVSSp7pNDhCR9071IfIRe\0\x55", /* $2x$ */ | |
772 | "i1D709vfamulimlGcq0qq3UvuUasvEa\0\x55"}; /* $2a$, $2y$ */ | |
773 | char *retval; | |
774 | const char *p; | |
775 | int ok; | |
776 | struct { | |
777 | char s[7 + 22 + 1]; | |
778 | char o[7 + 22 + 31 + 1 + 1 + 1]; | |
779 | } buf; | |
780 | ||
781 | /* Hash the supplied password */ | |
782 | _crypt_output_magic(setting, output, size); | |
783 | retval = BF_crypt(key, setting, output, size, 16); | |
784 | ||
785 | /* | |
786 | * Do a quick self-test. It is important that we make both calls to BF_crypt() | |
787 | * from the same scope such that they likely use the same stack locations, | |
788 | * which makes the second call overwrite the first call's sensitive data on the | |
789 | * stack and makes it more likely that any alignment related issues would be | |
790 | * detected by the self-test. | |
791 | */ | |
792 | CopyMem(buf.s, (void *)test_setting, sizeof(buf.s)); | |
793 | if (retval) | |
794 | buf.s[2] = setting[2]; | |
795 | SetMem(buf.o, sizeof(buf.o), 0x55); | |
796 | buf.o[sizeof(buf.o) - 1] = 0; | |
797 | p = BF_crypt(test_key, buf.s, buf.o, sizeof(buf.o) - (1 + 1), 1); | |
798 | ||
799 | ok = (p == buf.o && | |
800 | !CompareMem((void *)p, (void *)buf.s, 7 + 22) && | |
801 | !CompareMem((void *)(p + (7 + 22)), | |
802 | (void *)test_hash[(unsigned int)(unsigned char)buf.s[2] & 1], | |
803 | 31 + 1 + 1 + 1)); | |
804 | ||
805 | { | |
806 | const char *k = "\xff\xa3" "34" "\xff\xff\xff\xa3" "345"; | |
807 | BF_key ae, ai, ye, yi; | |
808 | BF_set_key(k, ae, ai, 2); /* $2a$ */ | |
809 | BF_set_key(k, ye, yi, 4); /* $2y$ */ | |
810 | ai[0] ^= 0x10000; /* undo the safety (for comparison) */ | |
811 | ok = ok && ai[0] == 0xdb9c59bc && ye[17] == 0x33343500 && | |
812 | !CompareMem(ae, ye, sizeof(ae)) && | |
813 | !CompareMem(ai, yi, sizeof(ai)); | |
814 | } | |
815 | ||
816 | if (ok) | |
817 | return retval; | |
818 | ||
819 | /* Should not happen */ | |
820 | _crypt_output_magic(setting, output, size); | |
821 | return NULL; | |
822 | } |