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Diffstat (limited to 'ffmpeg1/libavutil/hmac.c')
| -rw-r--r-- | ffmpeg1/libavutil/hmac.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/ffmpeg1/libavutil/hmac.c b/ffmpeg1/libavutil/hmac.c deleted file mode 100644 index e5f1434..0000000 --- a/ffmpeg1/libavutil/hmac.c +++ /dev/null @@ -1,186 +0,0 @@ -/* - * Copyright (C) 2012 Martin Storsjo - * - * This file is part of FFmpeg. - * - * FFmpeg is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * FFmpeg is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include <string.h> - -#include "hmac.h" -#include "md5.h" -#include "sha.h" -#include "mem.h" - -#define MAX_HASHLEN 20 -#define MAX_BLOCKLEN 64 - -struct AVHMAC { - void *hash; - int blocklen, hashlen; - void (*final)(void*, uint8_t*); - void (*update)(void*, const uint8_t*, int len); - void (*init)(void*); - uint8_t key[MAX_BLOCKLEN]; - int keylen; -}; - -static void sha1_init(void *ctx) -{ - av_sha_init(ctx, 160); -} - -AVHMAC *av_hmac_alloc(enum AVHMACType type) -{ - AVHMAC *c = av_mallocz(sizeof(*c)); - if (!c) - return NULL; - switch (type) { - case AV_HMAC_MD5: - c->blocklen = 64; - c->hashlen = 16; - c->init = av_md5_init; - c->update = av_md5_update; - c->final = av_md5_final; - c->hash = av_md5_alloc(); - break; - case AV_HMAC_SHA1: - c->blocklen = 64; - c->hashlen = 20; - c->init = sha1_init; - c->update = av_sha_update; - c->final = av_sha_final; - c->hash = av_sha_alloc(); - break; - default: - av_free(c); - return NULL; - } - if (!c->hash) { - av_free(c); - return NULL; - } - return c; -} - -void av_hmac_free(AVHMAC *c) -{ - if (!c) - return; - av_free(c->hash); - av_free(c); -} - -void av_hmac_init(AVHMAC *c, const uint8_t *key, unsigned int keylen) -{ - int i; - uint8_t block[MAX_BLOCKLEN]; - if (keylen > c->blocklen) { - c->init(c->hash); - c->update(c->hash, key, keylen); - c->final(c->hash, c->key); - c->keylen = c->hashlen; - } else { - memcpy(c->key, key, keylen); - c->keylen = keylen; - } - c->init(c->hash); - for (i = 0; i < c->keylen; i++) - block[i] = c->key[i] ^ 0x36; - for (i = c->keylen; i < c->blocklen; i++) - block[i] = 0x36; - c->update(c->hash, block, c->blocklen); -} - -void av_hmac_update(AVHMAC *c, const uint8_t *data, unsigned int len) -{ - c->update(c->hash, data, len); -} - -int av_hmac_final(AVHMAC *c, uint8_t *out, unsigned int outlen) -{ - uint8_t block[MAX_BLOCKLEN]; - int i; - if (outlen < c->hashlen) - return AVERROR(EINVAL); - c->final(c->hash, out); - c->init(c->hash); - for (i = 0; i < c->keylen; i++) - block[i] = c->key[i] ^ 0x5C; - for (i = c->keylen; i < c->blocklen; i++) - block[i] = 0x5C; - c->update(c->hash, block, c->blocklen); - c->update(c->hash, out, c->hashlen); - c->final(c->hash, out); - return c->hashlen; -} - -int av_hmac_calc(AVHMAC *c, const uint8_t *data, unsigned int len, - const uint8_t *key, unsigned int keylen, - uint8_t *out, unsigned int outlen) -{ - av_hmac_init(c, key, keylen); - av_hmac_update(c, data, len); - return av_hmac_final(c, out, outlen); -} - -#ifdef TEST -#include <stdio.h> - -static void test(AVHMAC *hmac, const uint8_t *key, int keylen, - const uint8_t *data, int datalen) -{ - uint8_t buf[MAX_HASHLEN]; - int out, i; - // Some of the test vectors are strings, where sizeof() includes the - // trailing null byte - remove that. - if (!key[keylen - 1]) - keylen--; - if (!data[datalen - 1]) - datalen--; - out = av_hmac_calc(hmac, data, datalen, key, keylen, buf, sizeof(buf)); - for (i = 0; i < out; i++) - printf("%02x", buf[i]); - printf("\n"); -} - -int main(void) -{ - uint8_t key1[16], key3[16], data3[50], key4[63], key5[64], key6[65]; - const uint8_t key2[] = "Jefe"; - const uint8_t data1[] = "Hi There"; - const uint8_t data2[] = "what do ya want for nothing?"; - AVHMAC *hmac = av_hmac_alloc(AV_HMAC_MD5); - if (!hmac) - return 1; - memset(key1, 0x0b, sizeof(key1)); - memset(key3, 0xaa, sizeof(key3)); - memset(key4, 0x44, sizeof(key4)); - memset(key5, 0x55, sizeof(key5)); - memset(key6, 0x66, sizeof(key6)); - memset(data3, 0xdd, sizeof(data3)); - // RFC 2104 test vectors - test(hmac, key1, sizeof(key1), data1, sizeof(data1)); - test(hmac, key2, sizeof(key2), data2, sizeof(data2)); - test(hmac, key3, sizeof(key3), data3, sizeof(data3)); - // Additional tests, to test cases where the key is too long - test(hmac, key4, sizeof(key4), data1, sizeof(data1)); - test(hmac, key5, sizeof(key5), data2, sizeof(data2)); - test(hmac, key6, sizeof(key6), data3, sizeof(data3)); - av_hmac_free(hmac); - return 0; -} -#endif /* TEST */ |