1/* 2 * Copyright (C) 2013 Reimar D��ffinger <Reimar.Doeffinger@gmx.de> 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20#include <stdint.h> 21#include "hash.h" 22 23#include "adler32.h" 24#include "crc.h" 25#include "md5.h" 26#include "murmur3.h" 27#include "ripemd.h" 28#include "sha.h" 29#include "sha512.h" 30 31#include "avstring.h" 32#include "base64.h" 33#include "error.h" 34#include "intreadwrite.h" 35#include "mem.h" 36 37enum hashtype { 38 MD5, 39 MURMUR3, 40 RIPEMD128, 41 RIPEMD160, 42 RIPEMD256, 43 RIPEMD320, 44 SHA160, 45 SHA224, 46 SHA256, 47 SHA512_224, 48 SHA512_256, 49 SHA384, 50 SHA512, 51 CRC32, 52 ADLER32, 53 NUM_HASHES 54}; 55 56typedef struct AVHashContext { 57 void *ctx; 58 enum hashtype type; 59 const AVCRC *crctab; 60 uint32_t crc; 61} AVHashContext; 62 63struct { 64 const char *name; 65 int size; 66} hashdesc[] = { 67 [MD5] = {"MD5", 16}, 68 [MURMUR3] = {"murmur3", 16}, 69 [RIPEMD128] = {"RIPEMD128", 16}, 70 [RIPEMD160] = {"RIPEMD160", 20}, 71 [RIPEMD256] = {"RIPEMD256", 32}, 72 [RIPEMD320] = {"RIPEMD320", 40}, 73 [SHA160] = {"SHA160", 20}, 74 [SHA224] = {"SHA224", 28}, 75 [SHA256] = {"SHA256", 32}, 76 [SHA512_224] = {"SHA512/224", 28}, 77 [SHA512_256] = {"SHA512/256", 32}, 78 [SHA384] = {"SHA384", 48}, 79 [SHA512] = {"SHA512", 64}, 80 [CRC32] = {"CRC32", 4}, 81 [ADLER32] = {"adler32", 4}, 82}; 83 84const char *av_hash_names(int i) 85{ 86 if (i < 0 || i >= NUM_HASHES) return NULL; 87 return hashdesc[i].name; 88} 89 90const char *av_hash_get_name(const AVHashContext *ctx) 91{ 92 return hashdesc[ctx->type].name; 93} 94 95int av_hash_get_size(const AVHashContext *ctx) 96{ 97 return hashdesc[ctx->type].size; 98} 99 100int av_hash_alloc(AVHashContext **ctx, const char *name) 101{ 102 AVHashContext *res; 103 int i; 104 *ctx = NULL; 105 for (i = 0; i < NUM_HASHES; i++) 106 if (av_strcasecmp(name, hashdesc[i].name) == 0) 107 break; 108 if (i >= NUM_HASHES) return AVERROR(EINVAL); 109 res = av_mallocz(sizeof(*res)); 110 if (!res) return AVERROR(ENOMEM); 111 res->type = i; 112 switch (i) { 113 case MD5: res->ctx = av_md5_alloc(); break; 114 case MURMUR3: res->ctx = av_murmur3_alloc(); break; 115 case RIPEMD128: 116 case RIPEMD160: 117 case RIPEMD256: 118 case RIPEMD320: res->ctx = av_ripemd_alloc(); break; 119 case SHA160: 120 case SHA224: 121 case SHA256: res->ctx = av_sha_alloc(); break; 122 case SHA512_224: 123 case SHA512_256: 124 case SHA384: 125 case SHA512: res->ctx = av_sha512_alloc(); break; 126 case CRC32: res->crctab = av_crc_get_table(AV_CRC_32_IEEE_LE); break; 127 case ADLER32: break; 128 } 129 if (i != ADLER32 && i != CRC32 && !res->ctx) { 130 av_free(res); 131 return AVERROR(ENOMEM); 132 } 133 *ctx = res; 134 return 0; 135} 136 137void av_hash_init(AVHashContext *ctx) 138{ 139 switch (ctx->type) { 140 case MD5: av_md5_init(ctx->ctx); break; 141 case MURMUR3: av_murmur3_init(ctx->ctx); break; 142 case RIPEMD128: av_ripemd_init(ctx->ctx, 128); break; 143 case RIPEMD160: av_ripemd_init(ctx->ctx, 160); break; 144 case RIPEMD256: av_ripemd_init(ctx->ctx, 256); break; 145 case RIPEMD320: av_ripemd_init(ctx->ctx, 320); break; 146 case SHA160: av_sha_init(ctx->ctx, 160); break; 147 case SHA224: av_sha_init(ctx->ctx, 224); break; 148 case SHA256: av_sha_init(ctx->ctx, 256); break; 149 case SHA512_224: av_sha512_init(ctx->ctx, 224); break; 150 case SHA512_256: av_sha512_init(ctx->ctx, 256); break; 151 case SHA384: av_sha512_init(ctx->ctx, 384); break; 152 case SHA512: av_sha512_init(ctx->ctx, 512); break; 153 case CRC32: ctx->crc = UINT32_MAX; break; 154 case ADLER32: ctx->crc = 1; break; 155 } 156} 157 158void av_hash_update(AVHashContext *ctx, const uint8_t *src, int len) 159{ 160 switch (ctx->type) { 161 case MD5: av_md5_update(ctx->ctx, src, len); break; 162 case MURMUR3: av_murmur3_update(ctx->ctx, src, len); break; 163 case RIPEMD128: 164 case RIPEMD160: 165 case RIPEMD256: 166 case RIPEMD320: av_ripemd_update(ctx->ctx, src, len); break; 167 case SHA160: 168 case SHA224: 169 case SHA256: av_sha_update(ctx->ctx, src, len); break; 170 case SHA512_224: 171 case SHA512_256: 172 case SHA384: 173 case SHA512: av_sha512_update(ctx->ctx, src, len); break; 174 case CRC32: ctx->crc = av_crc(ctx->crctab, ctx->crc, src, len); break; 175 case ADLER32: ctx->crc = av_adler32_update(ctx->crc, src, len); break; 176 } 177} 178 179void av_hash_final(AVHashContext *ctx, uint8_t *dst) 180{ 181 switch (ctx->type) { 182 case MD5: av_md5_final(ctx->ctx, dst); break; 183 case MURMUR3: av_murmur3_final(ctx->ctx, dst); break; 184 case RIPEMD128: 185 case RIPEMD160: 186 case RIPEMD256: 187 case RIPEMD320: av_ripemd_final(ctx->ctx, dst); break; 188 case SHA160: 189 case SHA224: 190 case SHA256: av_sha_final(ctx->ctx, dst); break; 191 case SHA512_224: 192 case SHA512_256: 193 case SHA384: 194 case SHA512: av_sha512_final(ctx->ctx, dst); break; 195 case CRC32: AV_WB32(dst, ctx->crc ^ UINT32_MAX); break; 196 case ADLER32: AV_WB32(dst, ctx->crc); break; 197 } 198} 199 200void av_hash_final_bin(struct AVHashContext *ctx, uint8_t *dst, int size) 201{ 202 uint8_t buf[AV_HASH_MAX_SIZE]; 203 unsigned rsize = av_hash_get_size(ctx); 204 205 av_hash_final(ctx, buf); 206 memcpy(dst, buf, FFMIN(size, rsize)); 207 if (size > rsize) 208 memset(dst + rsize, 0, size - rsize); 209} 210 211void av_hash_final_hex(struct AVHashContext *ctx, uint8_t *dst, int size) 212{ 213 uint8_t buf[AV_HASH_MAX_SIZE]; 214 unsigned rsize = av_hash_get_size(ctx), i; 215 216 av_hash_final(ctx, buf); 217 for (i = 0; i < FFMIN(rsize, size / 2); i++) 218 snprintf(dst + i * 2, size - i * 2, "%02x", buf[i]); 219} 220 221void av_hash_final_b64(struct AVHashContext *ctx, uint8_t *dst, int size) 222{ 223 uint8_t buf[AV_HASH_MAX_SIZE], b64[AV_BASE64_SIZE(AV_HASH_MAX_SIZE)]; 224 unsigned rsize = av_hash_get_size(ctx), osize; 225 226 av_hash_final(ctx, buf); 227 av_base64_encode(b64, sizeof(b64), buf, rsize); 228 osize = AV_BASE64_SIZE(rsize); 229 memcpy(dst, b64, FFMIN(osize, size)); 230 if (size < osize) 231 dst[size - 1] = 0; 232} 233 234void av_hash_freep(AVHashContext **ctx) 235{ 236 if (*ctx) 237 av_freep(&(*ctx)->ctx); 238 av_freep(ctx); 239} 240