| 1 | /* |
| 2 | * Copyright (C) 2013 Reimar Döffinger <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 | |
| 37 | enum 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 | |
| 56 | typedef struct AVHashContext { |
| 57 | void *ctx; |
| 58 | enum hashtype type; |
| 59 | const AVCRC *crctab; |
| 60 | uint32_t crc; |
| 61 | } AVHashContext; |
| 62 | |
| 63 | static const struct { |
| 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 | |
| 84 | const char *av_hash_names(int i) |
| 85 | { |
| 86 | if (i < 0 || i >= NUM_HASHES) return NULL; |
| 87 | return hashdesc[i].name; |
| 88 | } |
| 89 | |
| 90 | const char *av_hash_get_name(const AVHashContext *ctx) |
| 91 | { |
| 92 | return hashdesc[ctx->type].name; |
| 93 | } |
| 94 | |
| 95 | int av_hash_get_size(const AVHashContext *ctx) |
| 96 | { |
| 97 | return hashdesc[ctx->type].size; |
| 98 | } |
| 99 | |
| 100 | int 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 | |
| 137 | void 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 | |
| 158 | void 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 | |
| 179 | void 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 | |
| 200 | void 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 | |
| 211 | void 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 | |
| 221 | void 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 | |
| 234 | void av_hash_freep(AVHashContext **ctx) |
| 235 | { |
| 236 | if (*ctx) |
| 237 | av_freep(&(*ctx)->ctx); |
| 238 | av_freep(ctx); |
| 239 | } |