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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * Copyright (C) 2013 Reimar Döffinger |
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| 3 | * |
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| 4 | * This file is part of FFmpeg. |
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| 5 | * |
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| 6 | * FFmpeg is free software; you can redistribute it and/or |
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| 7 | * modify it under the terms of the GNU Lesser General Public |
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| 8 | * License as published by the Free Software Foundation; either |
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| 9 | * version 2.1 of the License, or (at your option) any later version. |
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| 10 | * |
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| 11 | * FFmpeg is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | * Lesser General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU Lesser General Public |
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| 17 | * License along with FFmpeg; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 19 | */ |
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| 20 | #include |
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| 21 | #include "hash.h" |
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| 22 | |||
| 23 | #include "adler32.h" |
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| 24 | #include "crc.h" |
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| 25 | #include "md5.h" |
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| 26 | #include "murmur3.h" |
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| 27 | #include "ripemd.h" |
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| 28 | #include "sha.h" |
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| 29 | #include "sha512.h" |
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| 30 | |||
| 31 | #include "avstring.h" |
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| 32 | #include "error.h" |
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| 33 | #include "intreadwrite.h" |
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| 34 | #include "mem.h" |
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| 35 | |||
| 36 | enum hashtype { |
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| 37 | MD5, |
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| 38 | MURMUR3, |
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| 39 | RIPEMD128, |
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| 40 | RIPEMD160, |
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| 41 | RIPEMD256, |
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| 42 | RIPEMD320, |
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| 43 | SHA160, |
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| 44 | SHA224, |
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| 45 | SHA256, |
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| 46 | SHA512_224, |
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| 47 | SHA512_256, |
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| 48 | SHA384, |
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| 49 | SHA512, |
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| 50 | CRC32, |
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| 51 | ADLER32, |
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| 52 | NUM_HASHES |
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| 53 | }; |
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| 54 | |||
| 55 | typedef struct AVHashContext { |
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| 56 | void *ctx; |
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| 57 | enum hashtype type; |
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| 58 | const AVCRC *crctab; |
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| 59 | uint32_t crc; |
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| 60 | } AVHashContext; |
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| 61 | |||
| 62 | struct { |
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| 63 | const char *name; |
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| 64 | int size; |
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| 65 | } hashdesc[] = { |
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| 66 | [MD5] = {"MD5", 16}, |
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| 67 | [MURMUR3] = {"murmur3", 16}, |
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| 68 | [RIPEMD128] = {"RIPEMD128", 16}, |
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| 69 | [RIPEMD160] = {"RIPEMD160", 20}, |
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| 70 | [RIPEMD256] = {"RIPEMD256", 32}, |
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| 71 | [RIPEMD320] = {"RIPEMD320", 40}, |
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| 72 | [SHA160] = {"SHA160", 20}, |
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| 73 | [SHA224] = {"SHA224", 28}, |
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| 74 | [SHA256] = {"SHA256", 32}, |
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| 75 | [SHA512_224] = {"SHA512/224", 28}, |
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| 76 | [SHA512_256] = {"SHA512/256", 32}, |
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| 77 | [SHA384] = {"SHA384", 48}, |
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| 78 | [SHA512] = {"SHA512", 64}, |
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| 79 | [CRC32] = {"CRC32", 4}, |
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| 80 | [ADLER32] = {"adler32", 4}, |
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| 81 | }; |
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| 82 | |||
| 83 | const char *av_hash_names(int i) |
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| 84 | { |
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| 85 | if (i < 0 || i >= NUM_HASHES) return NULL; |
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| 86 | return hashdesc[i].name; |
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| 87 | } |
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| 88 | |||
| 89 | const char *av_hash_get_name(const AVHashContext *ctx) |
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| 90 | { |
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| 91 | return hashdesc[ctx->type].name; |
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| 92 | } |
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| 93 | |||
| 94 | int av_hash_get_size(const AVHashContext *ctx) |
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| 95 | { |
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| 96 | return hashdesc[ctx->type].size; |
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| 97 | } |
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| 98 | |||
| 99 | int av_hash_alloc(AVHashContext **ctx, const char *name) |
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| 100 | { |
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| 101 | AVHashContext *res; |
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| 102 | int i; |
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| 103 | *ctx = NULL; |
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| 104 | for (i = 0; i < NUM_HASHES; i++) |
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| 105 | if (av_strcasecmp(name, hashdesc[i].name) == 0) |
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| 106 | break; |
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| 107 | if (i >= NUM_HASHES) return AVERROR(EINVAL); |
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| 108 | res = av_mallocz(sizeof(*res)); |
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| 109 | if (!res) return AVERROR(ENOMEM); |
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| 110 | res->type = i; |
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| 111 | switch (i) { |
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| 112 | case MD5: res->ctx = av_md5_alloc(); break; |
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| 113 | case MURMUR3: res->ctx = av_murmur3_alloc(); break; |
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| 114 | case RIPEMD128: |
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| 115 | case RIPEMD160: |
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| 116 | case RIPEMD256: |
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| 117 | case RIPEMD320: res->ctx = av_ripemd_alloc(); break; |
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| 118 | case SHA160: |
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| 119 | case SHA224: |
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| 120 | case SHA256: res->ctx = av_sha_alloc(); break; |
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| 121 | case SHA512_224: |
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| 122 | case SHA512_256: |
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| 123 | case SHA384: |
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| 124 | case SHA512: res->ctx = av_sha512_alloc(); break; |
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| 125 | case CRC32: res->crctab = av_crc_get_table(AV_CRC_32_IEEE_LE); break; |
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| 126 | case ADLER32: break; |
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| 127 | } |
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| 128 | if (i != ADLER32 && i != CRC32 && !res->ctx) { |
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| 129 | av_free(res); |
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| 130 | return AVERROR(ENOMEM); |
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| 131 | } |
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| 132 | *ctx = res; |
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| 133 | return 0; |
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| 134 | } |
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| 135 | |||
| 136 | void av_hash_init(AVHashContext *ctx) |
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| 137 | { |
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| 138 | switch (ctx->type) { |
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| 139 | case MD5: av_md5_init(ctx->ctx); break; |
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| 140 | case MURMUR3: av_murmur3_init(ctx->ctx); break; |
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| 141 | case RIPEMD128: av_ripemd_init(ctx->ctx, 128); break; |
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| 142 | case RIPEMD160: av_ripemd_init(ctx->ctx, 160); break; |
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| 143 | case RIPEMD256: av_ripemd_init(ctx->ctx, 256); break; |
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| 144 | case RIPEMD320: av_ripemd_init(ctx->ctx, 320); break; |
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| 145 | case SHA160: av_sha_init(ctx->ctx, 160); break; |
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| 146 | case SHA224: av_sha_init(ctx->ctx, 224); break; |
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| 147 | case SHA256: av_sha_init(ctx->ctx, 256); break; |
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| 148 | case SHA512_224: av_sha512_init(ctx->ctx, 224); break; |
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| 149 | case SHA512_256: av_sha512_init(ctx->ctx, 256); break; |
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| 150 | case SHA384: av_sha512_init(ctx->ctx, 384); break; |
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| 151 | case SHA512: av_sha512_init(ctx->ctx, 512); break; |
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| 152 | case CRC32: ctx->crc = UINT32_MAX; break; |
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| 153 | case ADLER32: ctx->crc = 1; break; |
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| 154 | } |
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| 155 | } |
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| 156 | |||
| 157 | void av_hash_update(AVHashContext *ctx, const uint8_t *src, int len) |
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| 158 | { |
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| 159 | switch (ctx->type) { |
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| 160 | case MD5: av_md5_update(ctx->ctx, src, len); break; |
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| 161 | case MURMUR3: av_murmur3_update(ctx->ctx, src, len); break; |
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| 162 | case RIPEMD128: |
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| 163 | case RIPEMD160: |
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| 164 | case RIPEMD256: |
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| 165 | case RIPEMD320: av_ripemd_update(ctx->ctx, src, len); break; |
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| 166 | case SHA160: |
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| 167 | case SHA224: |
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| 168 | case SHA256: av_sha_update(ctx->ctx, src, len); break; |
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| 169 | case SHA512_224: |
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| 170 | case SHA512_256: |
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| 171 | case SHA384: |
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| 172 | case SHA512: av_sha512_update(ctx->ctx, src, len); break; |
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| 173 | case CRC32: ctx->crc = av_crc(ctx->crctab, ctx->crc, src, len); break; |
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| 174 | case ADLER32: ctx->crc = av_adler32_update(ctx->crc, src, len); break; |
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| 175 | } |
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| 176 | } |
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| 177 | |||
| 178 | void av_hash_final(AVHashContext *ctx, uint8_t *dst) |
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| 179 | { |
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| 180 | switch (ctx->type) { |
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| 181 | case MD5: av_md5_final(ctx->ctx, dst); break; |
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| 182 | case MURMUR3: av_murmur3_final(ctx->ctx, dst); break; |
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| 183 | case RIPEMD128: |
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| 184 | case RIPEMD160: |
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| 185 | case RIPEMD256: |
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| 186 | case RIPEMD320: av_ripemd_final(ctx->ctx, dst); break; |
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| 187 | case SHA160: |
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| 188 | case SHA224: |
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| 189 | case SHA256: av_sha_final(ctx->ctx, dst); break; |
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| 190 | case SHA512_224: |
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| 191 | case SHA512_256: |
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| 192 | case SHA384: |
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| 193 | case SHA512: av_sha512_final(ctx->ctx, dst); break; |
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| 194 | case CRC32: AV_WB32(dst, ctx->crc ^ UINT32_MAX); break; |
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| 195 | case ADLER32: AV_WB32(dst, ctx->crc); break; |
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| 196 | } |
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| 197 | } |
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| 198 | |||
| 199 | void av_hash_freep(AVHashContext **ctx) |
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| 200 | { |
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| 201 | if (*ctx) |
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| 202 | av_freep(&(*ctx)->ctx); |
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| 203 | av_freep(ctx); |
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| 204 | } |