2 * Copyright (C) 2012 Martin Storsjo
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "attributes.h"
30 #define MAX_HASHLEN 64
31 #define MAX_BLOCKLEN 128
35 int blocklen
, hashlen
;
36 void (*final
)(void*, uint8_t*);
37 void (*update
)(void*, const uint8_t*, int len
);
39 uint8_t key
[MAX_BLOCKLEN
];
43 #define DEFINE_SHA(bits) \
44 static av_cold void sha ## bits ##_init(void *ctx) \
46 av_sha_init(ctx, bits); \
49 #define DEFINE_SHA512(bits) \
50 static av_cold void sha ## bits ##_init(void *ctx) \
52 av_sha512_init(ctx, bits); \
61 AVHMAC
*av_hmac_alloc(enum AVHMACType type
)
63 AVHMAC
*c
= av_mallocz(sizeof(*c
));
70 c
->init
= (void*)av_md5_init
;
71 c
->update
= (void*)av_md5_update
;
72 c
->final
= (void*)av_md5_final
;
73 c
->hash
= av_md5_alloc();
78 c
->init
= sha160_init
;
79 c
->update
= (void*)av_sha_update
;
80 c
->final
= (void*)av_sha_final
;
81 c
->hash
= av_sha_alloc();
86 c
->init
= sha224_init
;
87 c
->update
= (void*)av_sha_update
;
88 c
->final
= (void*)av_sha_final
;
89 c
->hash
= av_sha_alloc();
94 c
->init
= sha256_init
;
95 c
->update
= (void*)av_sha_update
;
96 c
->final
= (void*)av_sha_final
;
97 c
->hash
= av_sha_alloc();
102 c
->init
= sha384_init
;
103 c
->update
= (void*)av_sha512_update
;
104 c
->final
= (void*)av_sha512_final
;
105 c
->hash
= av_sha512_alloc();
110 c
->init
= sha512_init
;
111 c
->update
= (void*)av_sha512_update
;
112 c
->final
= (void*)av_sha512_final
;
113 c
->hash
= av_sha512_alloc();
126 void av_hmac_free(AVHMAC
*c
)
134 void av_hmac_init(AVHMAC
*c
, const uint8_t *key
, unsigned int keylen
)
137 uint8_t block
[MAX_BLOCKLEN
];
138 if (keylen
> c
->blocklen
) {
140 c
->update(c
->hash
, key
, keylen
);
141 c
->final(c
->hash
, c
->key
);
142 c
->keylen
= c
->hashlen
;
144 memcpy(c
->key
, key
, keylen
);
148 for (i
= 0; i
< c
->keylen
; i
++)
149 block
[i
] = c
->key
[i
] ^ 0x36;
150 for (i
= c
->keylen
; i
< c
->blocklen
; i
++)
152 c
->update(c
->hash
, block
, c
->blocklen
);
155 void av_hmac_update(AVHMAC
*c
, const uint8_t *data
, unsigned int len
)
157 c
->update(c
->hash
, data
, len
);
160 int av_hmac_final(AVHMAC
*c
, uint8_t *out
, unsigned int outlen
)
162 uint8_t block
[MAX_BLOCKLEN
];
164 if (outlen
< c
->hashlen
)
165 return AVERROR(EINVAL
);
166 c
->final(c
->hash
, out
);
168 for (i
= 0; i
< c
->keylen
; i
++)
169 block
[i
] = c
->key
[i
] ^ 0x5C;
170 for (i
= c
->keylen
; i
< c
->blocklen
; i
++)
172 c
->update(c
->hash
, block
, c
->blocklen
);
173 c
->update(c
->hash
, out
, c
->hashlen
);
174 c
->final(c
->hash
, out
);
178 int av_hmac_calc(AVHMAC
*c
, const uint8_t *data
, unsigned int len
,
179 const uint8_t *key
, unsigned int keylen
,
180 uint8_t *out
, unsigned int outlen
)
182 av_hmac_init(c
, key
, keylen
);
183 av_hmac_update(c
, data
, len
);
184 return av_hmac_final(c
, out
, outlen
);
190 static void test(AVHMAC
*hmac
, const uint8_t *key
, int keylen
,
191 const uint8_t *data
, int datalen
)
193 uint8_t buf
[MAX_HASHLEN
];
195 // Some of the test vectors are strings, where sizeof() includes the
196 // trailing null byte - remove that.
197 if (!key
[keylen
- 1])
199 if (!data
[datalen
- 1])
201 out
= av_hmac_calc(hmac
, data
, datalen
, key
, keylen
, buf
, sizeof(buf
));
202 for (i
= 0; i
< out
; i
++)
203 printf("%02x", buf
[i
]);
209 uint8_t key1
[20], key3
[131], data3
[50];
210 enum AVHMACType i
= AV_HMAC_SHA224
;
211 static const uint8_t key2
[] = "Jefe";
212 static const uint8_t data1
[] = "Hi There";
213 static const uint8_t data2
[] = "what do ya want for nothing?";
214 static const uint8_t data4
[] = "Test Using Larger Than Block-Size Key - Hash Key First";
215 static const uint8_t data5
[] = "Test Using Larger Than Block-Size Key and Larger Than One Block-Size Data";
216 static const uint8_t data6
[] = "This is a test using a larger than block-size key and a larger "
217 "than block-size data. The key needs to be hashed before being used"
218 " by the HMAC algorithm.";
219 AVHMAC
*hmac
= av_hmac_alloc(AV_HMAC_MD5
);
222 memset(key1
, 0x0b, sizeof(key1
));
223 memset(key3
, 0xaa, sizeof(key3
));
224 memset(data3
, 0xdd, sizeof(data3
));
225 // RFC 2202 test vectors
226 test(hmac
, key1
, 16, data1
, sizeof(data1
));
227 test(hmac
, key2
, sizeof(key2
), data2
, sizeof(data2
));
228 test(hmac
, key3
, 16, data3
, sizeof(data3
));
229 test(hmac
, key3
, 80, data4
, sizeof(data4
));
230 test(hmac
, key3
, 80, data5
, sizeof(data5
));
234 hmac
= av_hmac_alloc(AV_HMAC_SHA1
);
237 // RFC 2202 test vectors
238 test(hmac
, key1
, sizeof(key1
), data1
, sizeof(data1
));
239 test(hmac
, key2
, sizeof(key2
), data2
, sizeof(data2
));
240 test(hmac
, key3
, 20, data3
, sizeof(data3
));
241 test(hmac
, key3
, 80, data4
, sizeof(data4
));
242 test(hmac
, key3
, 80, data5
, sizeof(data5
));
246 while (i
<= AV_HMAC_SHA512
) {
247 hmac
= av_hmac_alloc(i
);
248 // RFC 4231 test vectors
249 test(hmac
, key1
, sizeof(key1
), data1
, sizeof(data1
));
250 test(hmac
, key2
, sizeof(key2
), data2
, sizeof(data2
));
251 test(hmac
, key3
, 20, data3
, sizeof(data3
));
252 test(hmac
, key3
, sizeof(key3
), data4
, sizeof(data4
));
253 test(hmac
, key3
, sizeof(key3
), data6
, sizeof(data6
));