blob: 7037b0d6ff7e365a621cab0f839a4579d70bceee
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 | } |
240 |