mirror of
https://github.com/pineappleEA/pineapple-src.git
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197 lines
5.4 KiB
C
Executable File
197 lines
5.4 KiB
C
Executable File
/*
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* Copyright (C) 2012 Martin Storsjo
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stddef.h>
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#include <stdint.h>
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#include <string.h>
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#include "attributes.h"
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#include "hmac.h"
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#include "md5.h"
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#include "sha.h"
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#include "sha512.h"
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#include "mem.h"
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#include "version.h"
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#define MAX_HASHLEN 64
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#define MAX_BLOCKLEN 128
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typedef void (*hmac_final)(void *ctx, uint8_t *dst);
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#if FF_API_CRYPTO_SIZE_T
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typedef void (*hmac_update)(void *ctx, const uint8_t *src, int len);
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#else
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typedef void (*hmac_update)(void *ctx, const uint8_t *src, size_t len);
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#endif
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typedef void (*hmac_init)(void *ctx);
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struct AVHMAC {
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void *hash;
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int blocklen, hashlen;
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hmac_final final;
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hmac_update update;
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hmac_init init;
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uint8_t key[MAX_BLOCKLEN];
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int keylen;
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};
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#define DEFINE_SHA(bits) \
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static av_cold void sha ## bits ##_init(void *ctx) \
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{ \
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av_sha_init(ctx, bits); \
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}
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#define DEFINE_SHA512(bits) \
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static av_cold void sha ## bits ##_init(void *ctx) \
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{ \
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av_sha512_init(ctx, bits); \
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}
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DEFINE_SHA(160)
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DEFINE_SHA(224)
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DEFINE_SHA(256)
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DEFINE_SHA512(384)
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DEFINE_SHA512(512)
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AVHMAC *av_hmac_alloc(enum AVHMACType type)
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{
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AVHMAC *c = av_mallocz(sizeof(*c));
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if (!c)
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return NULL;
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switch (type) {
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case AV_HMAC_MD5:
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c->blocklen = 64;
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c->hashlen = 16;
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c->init = (hmac_init) av_md5_init;
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c->update = (hmac_update) av_md5_update;
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c->final = (hmac_final) av_md5_final;
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c->hash = av_md5_alloc();
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break;
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case AV_HMAC_SHA1:
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c->blocklen = 64;
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c->hashlen = 20;
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c->init = sha160_init;
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c->update = (hmac_update) av_sha_update;
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c->final = (hmac_final) av_sha_final;
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c->hash = av_sha_alloc();
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break;
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case AV_HMAC_SHA224:
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c->blocklen = 64;
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c->hashlen = 28;
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c->init = sha224_init;
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c->update = (hmac_update) av_sha_update;
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c->final = (hmac_final) av_sha_final;
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c->hash = av_sha_alloc();
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break;
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case AV_HMAC_SHA256:
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c->blocklen = 64;
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c->hashlen = 32;
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c->init = sha256_init;
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c->update = (hmac_update) av_sha_update;
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c->final = (hmac_final) av_sha_final;
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c->hash = av_sha_alloc();
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break;
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case AV_HMAC_SHA384:
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c->blocklen = 128;
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c->hashlen = 48;
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c->init = sha384_init;
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c->update = (hmac_update) av_sha512_update;
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c->final = (hmac_final) av_sha512_final;
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c->hash = av_sha512_alloc();
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break;
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case AV_HMAC_SHA512:
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c->blocklen = 128;
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c->hashlen = 64;
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c->init = sha512_init;
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c->update = (hmac_update) av_sha512_update;
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c->final = (hmac_final) av_sha512_final;
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c->hash = av_sha512_alloc();
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break;
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default:
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av_free(c);
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return NULL;
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}
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if (!c->hash) {
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av_free(c);
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return NULL;
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}
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return c;
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}
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void av_hmac_free(AVHMAC *c)
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{
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if (!c)
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return;
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av_freep(&c->hash);
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av_free(c);
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}
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void av_hmac_init(AVHMAC *c, const uint8_t *key, unsigned int keylen)
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{
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int i;
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uint8_t block[MAX_BLOCKLEN];
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if (keylen > c->blocklen) {
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c->init(c->hash);
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c->update(c->hash, key, keylen);
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c->final(c->hash, c->key);
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c->keylen = c->hashlen;
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} else {
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memcpy(c->key, key, keylen);
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c->keylen = keylen;
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}
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c->init(c->hash);
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for (i = 0; i < c->keylen; i++)
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block[i] = c->key[i] ^ 0x36;
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for (i = c->keylen; i < c->blocklen; i++)
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block[i] = 0x36;
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c->update(c->hash, block, c->blocklen);
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}
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void av_hmac_update(AVHMAC *c, const uint8_t *data, unsigned int len)
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{
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c->update(c->hash, data, len);
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}
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int av_hmac_final(AVHMAC *c, uint8_t *out, unsigned int outlen)
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{
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uint8_t block[MAX_BLOCKLEN];
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int i;
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if (outlen < c->hashlen)
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return AVERROR(EINVAL);
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c->final(c->hash, out);
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c->init(c->hash);
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for (i = 0; i < c->keylen; i++)
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block[i] = c->key[i] ^ 0x5C;
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for (i = c->keylen; i < c->blocklen; i++)
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block[i] = 0x5C;
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c->update(c->hash, block, c->blocklen);
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c->update(c->hash, out, c->hashlen);
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c->final(c->hash, out);
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return c->hashlen;
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}
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int av_hmac_calc(AVHMAC *c, const uint8_t *data, unsigned int len,
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const uint8_t *key, unsigned int keylen,
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uint8_t *out, unsigned int outlen)
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{
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av_hmac_init(c, key, keylen);
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av_hmac_update(c, data, len);
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return av_hmac_final(c, out, outlen);
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}
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