mirror of
https://github.com/FFmpeg/FFmpeg.git
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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
/*
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* Copyright (C) 2013 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
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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 <assert.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include "hash.h"
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#include "adler32.h"
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#include "crc.h"
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#include "md5.h"
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#include "murmur3.h"
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#include "ripemd.h"
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#include "sha.h"
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#include "sha512.h"
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#include "avstring.h"
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#include "base64.h"
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#include "error.h"
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#include "intreadwrite.h"
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#include "mem.h"
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// ENTRY(HASH_TYPE, HASH_NAME, HASH_SIZE)
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#define HASHES(ENTRY) \
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ENTRY(MD5, "MD5", 16) \
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ENTRY(MURMUR3, "murmur3", 16) \
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ENTRY(RIPEMD128, "RIPEMD128", 16) \
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ENTRY(RIPEMD160, "RIPEMD160", 20) \
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ENTRY(RIPEMD256, "RIPEMD256", 32) \
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ENTRY(RIPEMD320, "RIPEMD320", 40) \
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ENTRY(SHA160, "SHA160", 20) \
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ENTRY(SHA224, "SHA224", 28) \
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ENTRY(SHA256, "SHA256", 32) \
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ENTRY(SHA512_224, "SHA512/224", 28) \
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ENTRY(SHA512_256, "SHA512/256", 32) \
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ENTRY(SHA384, "SHA384", 48) \
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ENTRY(SHA512, "SHA512", 64) \
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ENTRY(CRC32, "CRC32", 4) \
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ENTRY(ADLER32, "adler32", 4) \
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enum hashtype {
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#define HASH_TYPE(TYPE, NAME, SIZE) TYPE,
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HASHES(HASH_TYPE)
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NUM_HASHES
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};
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typedef struct AVHashContext {
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void *ctx;
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enum hashtype type;
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const AVCRC *crctab;
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uint32_t crc;
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} AVHashContext;
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#define HASH_MAX_SIZE(TYPE, NAME, SIZE) \
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HASH_MAX_SIZE_BEFORE_ ## TYPE, \
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HASH_MAX_SIZE_UNTIL_ ## TYPE ## _MINUS_ONE = FFMAX(SIZE, HASH_MAX_SIZE_BEFORE_ ## TYPE) - 1,
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enum {
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HASHES(HASH_MAX_SIZE)
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MAX_HASH_SIZE
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};
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static_assert(AV_HASH_MAX_SIZE >= MAX_HASH_SIZE, "AV_HASH_MAX_SIZE needs to be updated!");
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#define HASH_MAX_NAME_SIZE(TYPE, NAME, SIZE) \
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HASH_MAX_NAME_SIZE_BEFORE_ ## TYPE, \
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HASH_MAX_NAME_SIZE_UNTIL_ ## TYPE ## _MINUS_ONE = FFMAX(sizeof(NAME), HASH_MAX_NAME_SIZE_BEFORE_ ## TYPE) - 1,
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enum {
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HASHES(HASH_MAX_NAME_SIZE)
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MAX_HASH_NAME_SIZE
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};
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static const struct {
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const char name[MAX_HASH_NAME_SIZE];
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int size;
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} hashdesc[] = {
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#define HASH_DESC(TYPE, NAME, SIZE) [TYPE] = { NAME, SIZE },
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HASHES(HASH_DESC)
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};
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const char *av_hash_names(int i)
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{
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if (i < 0 || i >= NUM_HASHES) return NULL;
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return hashdesc[i].name;
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}
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const char *av_hash_get_name(const AVHashContext *ctx)
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{
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return hashdesc[ctx->type].name;
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}
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int av_hash_get_size(const AVHashContext *ctx)
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{
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return hashdesc[ctx->type].size;
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}
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int av_hash_alloc(AVHashContext **ctx, const char *name)
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{
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AVHashContext *res;
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int i;
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*ctx = NULL;
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for (i = 0; i < NUM_HASHES; i++)
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if (av_strcasecmp(name, hashdesc[i].name) == 0)
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break;
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if (i >= NUM_HASHES) return AVERROR(EINVAL);
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res = av_mallocz(sizeof(*res));
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if (!res) return AVERROR(ENOMEM);
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res->type = i;
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switch (i) {
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case MD5: res->ctx = av_md5_alloc(); break;
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case MURMUR3: res->ctx = av_murmur3_alloc(); break;
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case RIPEMD128:
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case RIPEMD160:
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case RIPEMD256:
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case RIPEMD320: res->ctx = av_ripemd_alloc(); break;
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case SHA160:
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case SHA224:
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case SHA256: res->ctx = av_sha_alloc(); break;
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case SHA512_224:
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case SHA512_256:
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case SHA384:
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case SHA512: res->ctx = av_sha512_alloc(); break;
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case CRC32: res->crctab = av_crc_get_table(AV_CRC_32_IEEE_LE); break;
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case ADLER32: break;
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}
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if (i != ADLER32 && i != CRC32 && !res->ctx) {
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av_free(res);
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return AVERROR(ENOMEM);
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}
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*ctx = res;
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return 0;
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}
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void av_hash_init(AVHashContext *ctx)
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{
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switch (ctx->type) {
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case MD5: av_md5_init(ctx->ctx); break;
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case MURMUR3: av_murmur3_init(ctx->ctx); break;
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case RIPEMD128: av_ripemd_init(ctx->ctx, 128); break;
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case RIPEMD160: av_ripemd_init(ctx->ctx, 160); break;
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case RIPEMD256: av_ripemd_init(ctx->ctx, 256); break;
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case RIPEMD320: av_ripemd_init(ctx->ctx, 320); break;
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case SHA160: av_sha_init(ctx->ctx, 160); break;
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case SHA224: av_sha_init(ctx->ctx, 224); break;
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case SHA256: av_sha_init(ctx->ctx, 256); break;
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case SHA512_224: av_sha512_init(ctx->ctx, 224); break;
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case SHA512_256: av_sha512_init(ctx->ctx, 256); break;
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case SHA384: av_sha512_init(ctx->ctx, 384); break;
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case SHA512: av_sha512_init(ctx->ctx, 512); break;
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case CRC32: ctx->crc = UINT32_MAX; break;
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case ADLER32: ctx->crc = 1; break;
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}
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}
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void av_hash_update(AVHashContext *ctx, const uint8_t *src, size_t len)
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{
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switch (ctx->type) {
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case MD5: av_md5_update(ctx->ctx, src, len); break;
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case MURMUR3: av_murmur3_update(ctx->ctx, src, len); break;
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case RIPEMD128:
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case RIPEMD160:
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case RIPEMD256:
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case RIPEMD320: av_ripemd_update(ctx->ctx, src, len); break;
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case SHA160:
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case SHA224:
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case SHA256: av_sha_update(ctx->ctx, src, len); break;
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case SHA512_224:
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case SHA512_256:
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case SHA384:
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case SHA512: av_sha512_update(ctx->ctx, src, len); break;
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case CRC32: ctx->crc = av_crc(ctx->crctab, ctx->crc, src, len); break;
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case ADLER32: ctx->crc = av_adler32_update(ctx->crc, src, len); break;
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}
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}
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void av_hash_final(AVHashContext *ctx, uint8_t *dst)
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{
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switch (ctx->type) {
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case MD5: av_md5_final(ctx->ctx, dst); break;
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case MURMUR3: av_murmur3_final(ctx->ctx, dst); break;
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case RIPEMD128:
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case RIPEMD160:
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case RIPEMD256:
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case RIPEMD320: av_ripemd_final(ctx->ctx, dst); break;
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case SHA160:
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case SHA224:
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case SHA256: av_sha_final(ctx->ctx, dst); break;
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case SHA512_224:
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case SHA512_256:
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case SHA384:
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case SHA512: av_sha512_final(ctx->ctx, dst); break;
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case CRC32: AV_WB32(dst, ctx->crc ^ UINT32_MAX); break;
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case ADLER32: AV_WB32(dst, ctx->crc); break;
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}
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}
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void av_hash_final_bin(struct AVHashContext *ctx, uint8_t *dst, int size)
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{
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uint8_t buf[AV_HASH_MAX_SIZE];
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unsigned rsize = av_hash_get_size(ctx);
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av_hash_final(ctx, buf);
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memcpy(dst, buf, FFMIN(size, rsize));
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if (size > rsize)
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memset(dst + rsize, 0, size - rsize);
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}
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void av_hash_final_hex(struct AVHashContext *ctx, uint8_t *dst, int size)
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{
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uint8_t buf[AV_HASH_MAX_SIZE];
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unsigned rsize = av_hash_get_size(ctx), i;
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av_hash_final(ctx, buf);
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for (i = 0; i < FFMIN(rsize, size / 2); i++)
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snprintf(dst + i * 2, size - i * 2, "%02x", buf[i]);
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}
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void av_hash_final_b64(struct AVHashContext *ctx, uint8_t *dst, int size)
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{
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uint8_t buf[AV_HASH_MAX_SIZE], b64[AV_BASE64_SIZE(AV_HASH_MAX_SIZE)];
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unsigned rsize = av_hash_get_size(ctx), osize;
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av_hash_final(ctx, buf);
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av_base64_encode(b64, sizeof(b64), buf, rsize);
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osize = AV_BASE64_SIZE(rsize);
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memcpy(dst, b64, FFMIN(osize, size));
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if (size < osize)
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dst[size - 1] = 0;
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}
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void av_hash_freep(AVHashContext **ctx)
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{
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if (*ctx)
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av_freep(&(*ctx)->ctx);
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av_freep(ctx);
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}
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