| /* |
| * 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 "base64.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; |
| |
| static const 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; |
| } |
| } |
| |
| #if FF_API_CRYPTO_SIZE_T |
| void av_hash_update(AVHashContext *ctx, const uint8_t *src, int len) |
| #else |
| void av_hash_update(AVHashContext *ctx, const uint8_t *src, size_t len) |
| #endif |
| { |
| 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); |
| } |