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d02b48c6 | 1 | /* crypto/evp/digest.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
3 | * All rights reserved. |
4 | * | |
5 | * This package is an SSL implementation written | |
6 | * by Eric Young (eay@cryptsoft.com). | |
7 | * The implementation was written so as to conform with Netscapes SSL. | |
8 | * | |
9 | * This library is free for commercial and non-commercial use as long as | |
10 | * the following conditions are aheared to. The following conditions | |
11 | * apply to all code found in this distribution, be it the RC4, RSA, | |
12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
13 | * included with this distribution is covered by the same copyright terms | |
14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
15 | * | |
16 | * Copyright remains Eric Young's, and as such any Copyright notices in | |
17 | * the code are not to be removed. | |
18 | * If this package is used in a product, Eric Young should be given attribution | |
19 | * as the author of the parts of the library used. | |
20 | * This can be in the form of a textual message at program startup or | |
21 | * in documentation (online or textual) provided with the package. | |
22 | * | |
23 | * Redistribution and use in source and binary forms, with or without | |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
26 | * 1. Redistributions of source code must retain the copyright | |
27 | * notice, this list of conditions and the following disclaimer. | |
28 | * 2. Redistributions in binary form must reproduce the above copyright | |
29 | * notice, this list of conditions and the following disclaimer in the | |
30 | * documentation and/or other materials provided with the distribution. | |
31 | * 3. All advertising materials mentioning features or use of this software | |
32 | * must display the following acknowledgement: | |
33 | * "This product includes cryptographic software written by | |
34 | * Eric Young (eay@cryptsoft.com)" | |
35 | * The word 'cryptographic' can be left out if the rouines from the library | |
36 | * being used are not cryptographic related :-). | |
37 | * 4. If you include any Windows specific code (or a derivative thereof) from | |
38 | * the apps directory (application code) you must include an acknowledgement: | |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
40 | * | |
41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | |
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
51 | * SUCH DAMAGE. | |
52 | * | |
53 | * The licence and distribution terms for any publically available version or | |
54 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
55 | * copied and put under another distribution licence | |
56 | * [including the GNU Public Licence.] | |
57 | */ | |
5ba372b1 BM |
58 | /* ==================================================================== |
59 | * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved. | |
60 | * | |
61 | * Redistribution and use in source and binary forms, with or without | |
62 | * modification, are permitted provided that the following conditions | |
63 | * are met: | |
64 | * | |
65 | * 1. Redistributions of source code must retain the above copyright | |
66 | * notice, this list of conditions and the following disclaimer. | |
67 | * | |
68 | * 2. Redistributions in binary form must reproduce the above copyright | |
69 | * notice, this list of conditions and the following disclaimer in | |
70 | * the documentation and/or other materials provided with the | |
71 | * distribution. | |
72 | * | |
73 | * 3. All advertising materials mentioning features or use of this | |
74 | * software must display the following acknowledgment: | |
75 | * "This product includes software developed by the OpenSSL Project | |
76 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
77 | * | |
78 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
79 | * endorse or promote products derived from this software without | |
80 | * prior written permission. For written permission, please contact | |
81 | * openssl-core@openssl.org. | |
82 | * | |
83 | * 5. Products derived from this software may not be called "OpenSSL" | |
84 | * nor may "OpenSSL" appear in their names without prior written | |
85 | * permission of the OpenSSL Project. | |
86 | * | |
87 | * 6. Redistributions of any form whatsoever must retain the following | |
88 | * acknowledgment: | |
89 | * "This product includes software developed by the OpenSSL Project | |
90 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
91 | * | |
92 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
93 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
94 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
95 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
96 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
97 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
98 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
99 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
100 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
101 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
102 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
103 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
104 | * ==================================================================== | |
105 | * | |
106 | * This product includes cryptographic software written by Eric Young | |
107 | * (eay@cryptsoft.com). This product includes software written by Tim | |
108 | * Hudson (tjh@cryptsoft.com). | |
109 | * | |
110 | */ | |
d02b48c6 RE |
111 | |
112 | #include <stdio.h> | |
113 | #include "cryptlib.h" | |
ec577822 BM |
114 | #include <openssl/objects.h> |
115 | #include <openssl/evp.h> | |
d02b48c6 | 116 | |
dbad1690 BL |
117 | void EVP_MD_CTX_init(EVP_MD_CTX *ctx) |
118 | { | |
119 | memset(ctx,'\0',sizeof *ctx); | |
120 | } | |
121 | ||
122 | EVP_MD_CTX *EVP_MD_CTX_create(void) | |
123 | { | |
124 | EVP_MD_CTX *ctx=OPENSSL_malloc(sizeof *ctx); | |
125 | ||
126 | EVP_MD_CTX_init(ctx); | |
127 | ||
128 | return ctx; | |
129 | } | |
130 | ||
2dc769a1 | 131 | int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type) |
d02b48c6 | 132 | { |
5ba372b1 | 133 | if (ctx->digest != type) |
dbad1690 | 134 | { |
5ba372b1 | 135 | if (ctx->digest && ctx->digest->ctx_size) |
e19ea557 | 136 | OPENSSL_free(ctx->md_data); |
dbad1690 | 137 | ctx->digest=type; |
5ba372b1 | 138 | if (type->ctx_size) |
26188931 | 139 | ctx->md_data=OPENSSL_malloc(type->ctx_size); |
5a853853 | 140 | } |
26188931 | 141 | return type->init(ctx); |
d02b48c6 RE |
142 | } |
143 | ||
2dc769a1 | 144 | int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, |
6b691a5c | 145 | unsigned int count) |
d02b48c6 | 146 | { |
26188931 | 147 | return ctx->digest->update(ctx,data,(unsigned long)count); |
d02b48c6 RE |
148 | } |
149 | ||
dbad1690 | 150 | /* The caller can assume that this removes any secret data from the context */ |
2dc769a1 | 151 | int EVP_DigestFinal(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size) |
d02b48c6 | 152 | { |
2dc769a1 | 153 | int ret; |
26188931 | 154 | ret=ctx->digest->final(ctx,md); |
d02b48c6 RE |
155 | if (size != NULL) |
156 | *size=ctx->digest->md_size; | |
dbad1690 BL |
157 | /* FIXME: add a cleanup function to the ctx? */ |
158 | memset(ctx->md_data,0,ctx->digest->ctx_size); | |
2dc769a1 | 159 | return ret; |
d02b48c6 | 160 | } |
351d8998 | 161 | |
dbad1690 | 162 | int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in) |
26188931 | 163 | { |
5ba372b1 BM |
164 | if ((in == NULL) || (in->digest == NULL)) |
165 | { | |
166 | EVPerr(EVP_F_EVP_MD_CTX_COPY,EVP_R_INPUT_NOT_INITIALIZED); | |
167 | return 0; | |
168 | } | |
26188931 | 169 | |
5ba372b1 BM |
170 | EVP_MD_CTX_cleanup(out); |
171 | memcpy(out,in,sizeof *out); | |
26188931 | 172 | |
5ba372b1 BM |
173 | if (out->digest->ctx_size) |
174 | { | |
175 | out->md_data=OPENSSL_malloc(out->digest->ctx_size); | |
176 | memcpy(out->md_data,in->md_data,out->digest->ctx_size); | |
177 | } | |
178 | ||
179 | if (out->digest->copy) | |
180 | return out->digest->copy(out,in); | |
181 | ||
182 | return 1; | |
183 | } | |
88ce56f8 DSH |
184 | |
185 | int EVP_Digest(void *data, unsigned int count, | |
186 | unsigned char *md, unsigned int *size, const EVP_MD *type) | |
5ba372b1 | 187 | { |
88ce56f8 | 188 | EVP_MD_CTX ctx; |
dbad1690 BL |
189 | int ret; |
190 | ||
191 | EVP_MD_CTX_init(&ctx); | |
26188931 | 192 | EVP_MD_CTX_set_flags(&ctx,EVP_MD_CTX_FLAG_ONESHOT); |
dbad1690 BL |
193 | ret=EVP_DigestInit(&ctx, type) |
194 | && EVP_DigestUpdate(&ctx, data, count) | |
195 | && EVP_DigestFinal(&ctx, md, size); | |
196 | EVP_MD_CTX_cleanup(&ctx); | |
197 | ||
198 | return ret; | |
5ba372b1 | 199 | } |
dbad1690 BL |
200 | |
201 | void EVP_MD_CTX_destroy(EVP_MD_CTX *ctx) | |
202 | { | |
203 | EVP_MD_CTX_cleanup(ctx); | |
204 | OPENSSL_free(ctx); | |
205 | } | |
206 | ||
207 | /* This call frees resources associated with the context */ | |
208 | int EVP_MD_CTX_cleanup(EVP_MD_CTX *ctx) | |
209 | { | |
1f3b6580 BL |
210 | /* Don't assume ctx->md_data was cleaned in EVP_Digest_Final, |
211 | * because sometimes only copies of the context are ever finalised. | |
212 | */ | |
5ba372b1 | 213 | if (ctx->digest && ctx->digest->cleanup) |
e8330cf5 | 214 | ctx->digest->cleanup(ctx); |
5ba372b1 | 215 | if (ctx->digest && ctx->digest->ctx_size && ctx->md_data) |
e19ea557 GT |
216 | { |
217 | memset(ctx->md_data,0,ctx->digest->ctx_size); | |
218 | OPENSSL_free(ctx->md_data); | |
219 | } | |
dbad1690 BL |
220 | memset(ctx,'\0',sizeof *ctx); |
221 | ||
222 | return 1; | |
223 | } |