mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-25 08:42:39 +00:00
e6c7a88b34
These strings are so short (longest takes 11B) that using pointers is wasteful. Avoiding them also moves hashdesc into .rodata (from .data.rel.ro). Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
254 lines
7.5 KiB
C
254 lines
7.5 KiB
C
/*
|
|
* 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 <assert.h>
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <string.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 "base64.h"
|
|
#include "error.h"
|
|
#include "intreadwrite.h"
|
|
#include "mem.h"
|
|
|
|
// ENTRY(HASH_TYPE, HASH_NAME, HASH_SIZE)
|
|
#define HASHES(ENTRY) \
|
|
ENTRY(MD5, "MD5", 16) \
|
|
ENTRY(MURMUR3, "murmur3", 16) \
|
|
ENTRY(RIPEMD128, "RIPEMD128", 16) \
|
|
ENTRY(RIPEMD160, "RIPEMD160", 20) \
|
|
ENTRY(RIPEMD256, "RIPEMD256", 32) \
|
|
ENTRY(RIPEMD320, "RIPEMD320", 40) \
|
|
ENTRY(SHA160, "SHA160", 20) \
|
|
ENTRY(SHA224, "SHA224", 28) \
|
|
ENTRY(SHA256, "SHA256", 32) \
|
|
ENTRY(SHA512_224, "SHA512/224", 28) \
|
|
ENTRY(SHA512_256, "SHA512/256", 32) \
|
|
ENTRY(SHA384, "SHA384", 48) \
|
|
ENTRY(SHA512, "SHA512", 64) \
|
|
ENTRY(CRC32, "CRC32", 4) \
|
|
ENTRY(ADLER32, "adler32", 4) \
|
|
|
|
enum hashtype {
|
|
#define HASH_TYPE(TYPE, NAME, SIZE) TYPE,
|
|
HASHES(HASH_TYPE)
|
|
NUM_HASHES
|
|
};
|
|
|
|
typedef struct AVHashContext {
|
|
void *ctx;
|
|
enum hashtype type;
|
|
const AVCRC *crctab;
|
|
uint32_t crc;
|
|
} AVHashContext;
|
|
|
|
#define HASH_MAX_SIZE(TYPE, NAME, SIZE) \
|
|
HASH_MAX_SIZE_BEFORE_ ## TYPE, \
|
|
HASH_MAX_SIZE_UNTIL_ ## TYPE ## _MINUS_ONE = FFMAX(SIZE, HASH_MAX_SIZE_BEFORE_ ## TYPE) - 1,
|
|
enum {
|
|
HASHES(HASH_MAX_SIZE)
|
|
MAX_HASH_SIZE
|
|
};
|
|
static_assert(AV_HASH_MAX_SIZE >= MAX_HASH_SIZE, "AV_HASH_MAX_SIZE needs to be updated!");
|
|
|
|
#define HASH_MAX_NAME_SIZE(TYPE, NAME, SIZE) \
|
|
HASH_MAX_NAME_SIZE_BEFORE_ ## TYPE, \
|
|
HASH_MAX_NAME_SIZE_UNTIL_ ## TYPE ## _MINUS_ONE = FFMAX(sizeof(NAME), HASH_MAX_NAME_SIZE_BEFORE_ ## TYPE) - 1,
|
|
enum {
|
|
HASHES(HASH_MAX_NAME_SIZE)
|
|
MAX_HASH_NAME_SIZE
|
|
};
|
|
|
|
static const struct {
|
|
const char name[MAX_HASH_NAME_SIZE];
|
|
int size;
|
|
} hashdesc[] = {
|
|
#define HASH_DESC(TYPE, NAME, SIZE) [TYPE] = { NAME, SIZE },
|
|
HASHES(HASH_DESC)
|
|
};
|
|
|
|
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, size_t 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_final_bin(struct AVHashContext *ctx, uint8_t *dst, int size)
|
|
{
|
|
uint8_t buf[AV_HASH_MAX_SIZE];
|
|
unsigned rsize = av_hash_get_size(ctx);
|
|
|
|
av_hash_final(ctx, buf);
|
|
memcpy(dst, buf, FFMIN(size, rsize));
|
|
if (size > rsize)
|
|
memset(dst + rsize, 0, size - rsize);
|
|
}
|
|
|
|
void av_hash_final_hex(struct AVHashContext *ctx, uint8_t *dst, int size)
|
|
{
|
|
uint8_t buf[AV_HASH_MAX_SIZE];
|
|
unsigned rsize = av_hash_get_size(ctx), i;
|
|
|
|
av_hash_final(ctx, buf);
|
|
for (i = 0; i < FFMIN(rsize, size / 2); i++)
|
|
snprintf(dst + i * 2, size - i * 2, "%02x", buf[i]);
|
|
}
|
|
|
|
void av_hash_final_b64(struct AVHashContext *ctx, uint8_t *dst, int size)
|
|
{
|
|
uint8_t buf[AV_HASH_MAX_SIZE], b64[AV_BASE64_SIZE(AV_HASH_MAX_SIZE)];
|
|
unsigned rsize = av_hash_get_size(ctx), osize;
|
|
|
|
av_hash_final(ctx, buf);
|
|
av_base64_encode(b64, sizeof(b64), buf, rsize);
|
|
osize = AV_BASE64_SIZE(rsize);
|
|
memcpy(dst, b64, FFMIN(osize, size));
|
|
if (size < osize)
|
|
dst[size - 1] = 0;
|
|
}
|
|
|
|
void av_hash_freep(AVHashContext **ctx)
|
|
{
|
|
if (*ctx)
|
|
av_freep(&(*ctx)->ctx);
|
|
av_freep(ctx);
|
|
}
|