0,0 → 1,204 |
/* |
* Copyright (C) 2013 Reimar Döffinger <Reimar.Doeffinger@gmx.de> |
* |
* 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 <stdint.h> |
#include "hash.h" |
|
#include "adler32.h" |
#include "crc.h" |
#include "md5.h" |
#include "murmur3.h" |
#include "ripemd.h" |
#include "sha.h" |
#include "sha512.h" |
|
#include "avstring.h" |
#include "error.h" |
#include "intreadwrite.h" |
#include "mem.h" |
|
enum hashtype { |
MD5, |
MURMUR3, |
RIPEMD128, |
RIPEMD160, |
RIPEMD256, |
RIPEMD320, |
SHA160, |
SHA224, |
SHA256, |
SHA512_224, |
SHA512_256, |
SHA384, |
SHA512, |
CRC32, |
ADLER32, |
NUM_HASHES |
}; |
|
typedef struct AVHashContext { |
void *ctx; |
enum hashtype type; |
const AVCRC *crctab; |
uint32_t crc; |
} AVHashContext; |
|
struct { |
const char *name; |
int size; |
} hashdesc[] = { |
[MD5] = {"MD5", 16}, |
[MURMUR3] = {"murmur3", 16}, |
[RIPEMD128] = {"RIPEMD128", 16}, |
[RIPEMD160] = {"RIPEMD160", 20}, |
[RIPEMD256] = {"RIPEMD256", 32}, |
[RIPEMD320] = {"RIPEMD320", 40}, |
[SHA160] = {"SHA160", 20}, |
[SHA224] = {"SHA224", 28}, |
[SHA256] = {"SHA256", 32}, |
[SHA512_224] = {"SHA512/224", 28}, |
[SHA512_256] = {"SHA512/256", 32}, |
[SHA384] = {"SHA384", 48}, |
[SHA512] = {"SHA512", 64}, |
[CRC32] = {"CRC32", 4}, |
[ADLER32] = {"adler32", 4}, |
}; |
|
const char *av_hash_names(int i) |
{ |
if (i < 0 || i >= NUM_HASHES) return NULL; |
return hashdesc[i].name; |
} |
|
const char *av_hash_get_name(const AVHashContext *ctx) |
{ |
return hashdesc[ctx->type].name; |
} |
|
int av_hash_get_size(const AVHashContext *ctx) |
{ |
return hashdesc[ctx->type].size; |
} |
|
int av_hash_alloc(AVHashContext **ctx, const char *name) |
{ |
AVHashContext *res; |
int i; |
*ctx = NULL; |
for (i = 0; i < NUM_HASHES; i++) |
if (av_strcasecmp(name, hashdesc[i].name) == 0) |
break; |
if (i >= NUM_HASHES) return AVERROR(EINVAL); |
res = av_mallocz(sizeof(*res)); |
if (!res) return AVERROR(ENOMEM); |
res->type = i; |
switch (i) { |
case MD5: res->ctx = av_md5_alloc(); break; |
case MURMUR3: res->ctx = av_murmur3_alloc(); break; |
case RIPEMD128: |
case RIPEMD160: |
case RIPEMD256: |
case RIPEMD320: res->ctx = av_ripemd_alloc(); break; |
case SHA160: |
case SHA224: |
case SHA256: res->ctx = av_sha_alloc(); break; |
case SHA512_224: |
case SHA512_256: |
case SHA384: |
case SHA512: res->ctx = av_sha512_alloc(); break; |
case CRC32: res->crctab = av_crc_get_table(AV_CRC_32_IEEE_LE); break; |
case ADLER32: break; |
} |
if (i != ADLER32 && i != CRC32 && !res->ctx) { |
av_free(res); |
return AVERROR(ENOMEM); |
} |
*ctx = res; |
return 0; |
} |
|
void av_hash_init(AVHashContext *ctx) |
{ |
switch (ctx->type) { |
case MD5: av_md5_init(ctx->ctx); break; |
case MURMUR3: av_murmur3_init(ctx->ctx); break; |
case RIPEMD128: av_ripemd_init(ctx->ctx, 128); break; |
case RIPEMD160: av_ripemd_init(ctx->ctx, 160); break; |
case RIPEMD256: av_ripemd_init(ctx->ctx, 256); break; |
case RIPEMD320: av_ripemd_init(ctx->ctx, 320); break; |
case SHA160: av_sha_init(ctx->ctx, 160); break; |
case SHA224: av_sha_init(ctx->ctx, 224); break; |
case SHA256: av_sha_init(ctx->ctx, 256); break; |
case SHA512_224: av_sha512_init(ctx->ctx, 224); break; |
case SHA512_256: av_sha512_init(ctx->ctx, 256); break; |
case SHA384: av_sha512_init(ctx->ctx, 384); break; |
case SHA512: av_sha512_init(ctx->ctx, 512); break; |
case CRC32: ctx->crc = UINT32_MAX; break; |
case ADLER32: ctx->crc = 1; break; |
} |
} |
|
void av_hash_update(AVHashContext *ctx, const uint8_t *src, int len) |
{ |
switch (ctx->type) { |
case MD5: av_md5_update(ctx->ctx, src, len); break; |
case MURMUR3: av_murmur3_update(ctx->ctx, src, len); break; |
case RIPEMD128: |
case RIPEMD160: |
case RIPEMD256: |
case RIPEMD320: av_ripemd_update(ctx->ctx, src, len); break; |
case SHA160: |
case SHA224: |
case SHA256: av_sha_update(ctx->ctx, src, len); break; |
case SHA512_224: |
case SHA512_256: |
case SHA384: |
case SHA512: av_sha512_update(ctx->ctx, src, len); break; |
case CRC32: ctx->crc = av_crc(ctx->crctab, ctx->crc, src, len); break; |
case ADLER32: ctx->crc = av_adler32_update(ctx->crc, src, len); break; |
} |
} |
|
void av_hash_final(AVHashContext *ctx, uint8_t *dst) |
{ |
switch (ctx->type) { |
case MD5: av_md5_final(ctx->ctx, dst); break; |
case MURMUR3: av_murmur3_final(ctx->ctx, dst); break; |
case RIPEMD128: |
case RIPEMD160: |
case RIPEMD256: |
case RIPEMD320: av_ripemd_final(ctx->ctx, dst); break; |
case SHA160: |
case SHA224: |
case SHA256: av_sha_final(ctx->ctx, dst); break; |
case SHA512_224: |
case SHA512_256: |
case SHA384: |
case SHA512: av_sha512_final(ctx->ctx, dst); break; |
case CRC32: AV_WB32(dst, ctx->crc ^ UINT32_MAX); break; |
case ADLER32: AV_WB32(dst, ctx->crc); break; |
} |
} |
|
void av_hash_freep(AVHashContext **ctx) |
{ |
if (*ctx) |
av_freep(&(*ctx)->ctx); |
av_freep(ctx); |
} |