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diff --git a/src/lib/libcrypto/evp/bio_md.c b/src/lib/libcrypto/evp/bio_md.c
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1/* $OpenBSD: bio_md.c,v 1.14 2014/07/11 08:44:48 jsing Exp $ */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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 */
58
59#include <stdio.h>
60#include <errno.h>
61
62#include <openssl/buffer.h>
63#include <openssl/evp.h>
64
65/* BIO_put and BIO_get both add to the digest,
66 * BIO_gets returns the digest */
67
68static int md_write(BIO *h, char const *buf, int num);
69static int md_read(BIO *h, char *buf, int size);
70/*static int md_puts(BIO *h, const char *str); */
71static int md_gets(BIO *h, char *str, int size);
72static long md_ctrl(BIO *h, int cmd, long arg1, void *arg2);
73static int md_new(BIO *h);
74static int md_free(BIO *data);
75static long md_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp);
76
77static BIO_METHOD methods_md = {
78 .type = BIO_TYPE_MD,
79 .name = "message digest",
80 .bwrite = md_write,
81 .bread = md_read,
82 .bgets = md_gets,
83 .ctrl = md_ctrl,
84 .create = md_new,
85 .destroy = md_free,
86 .callback_ctrl = md_callback_ctrl
87};
88
89BIO_METHOD *
90BIO_f_md(void)
91{
92 return (&methods_md);
93}
94
95static int
96md_new(BIO *bi)
97{
98 EVP_MD_CTX *ctx;
99
100 ctx = EVP_MD_CTX_create();
101 if (ctx == NULL)
102 return (0);
103
104 bi->init = 0;
105 bi->ptr = (char *)ctx;
106 bi->flags = 0;
107 return (1);
108}
109
110static int
111md_free(BIO *a)
112{
113 if (a == NULL)
114 return (0);
115 EVP_MD_CTX_destroy(a->ptr);
116 a->ptr = NULL;
117 a->init = 0;
118 a->flags = 0;
119 return (1);
120}
121
122static int
123md_read(BIO *b, char *out, int outl)
124{
125 int ret = 0;
126 EVP_MD_CTX *ctx;
127
128 if (out == NULL)
129 return (0);
130 ctx = b->ptr;
131
132 if ((ctx == NULL) || (b->next_bio == NULL))
133 return (0);
134
135 ret = BIO_read(b->next_bio, out, outl);
136 if (b->init) {
137 if (ret > 0) {
138 if (EVP_DigestUpdate(ctx, (unsigned char *)out,
139 (unsigned int)ret) <= 0)
140 return (-1);
141 }
142 }
143 BIO_clear_retry_flags(b);
144 BIO_copy_next_retry(b);
145 return (ret);
146}
147
148static int
149md_write(BIO *b, const char *in, int inl)
150{
151 int ret = 0;
152 EVP_MD_CTX *ctx;
153
154 if ((in == NULL) || (inl <= 0))
155 return (0);
156 ctx = b->ptr;
157
158 if ((ctx != NULL) && (b->next_bio != NULL))
159 ret = BIO_write(b->next_bio, in, inl);
160 if (b->init) {
161 if (ret > 0) {
162 if (!EVP_DigestUpdate(ctx, (const unsigned char *)in,
163 (unsigned int)ret)) {
164 BIO_clear_retry_flags(b);
165 return 0;
166 }
167 }
168 }
169 if (b->next_bio != NULL) {
170 BIO_clear_retry_flags(b);
171 BIO_copy_next_retry(b);
172 }
173 return (ret);
174}
175
176static long
177md_ctrl(BIO *b, int cmd, long num, void *ptr)
178{
179 EVP_MD_CTX *ctx, *dctx, **pctx;
180 const EVP_MD **ppmd;
181 EVP_MD *md;
182 long ret = 1;
183 BIO *dbio;
184
185 ctx = b->ptr;
186
187 switch (cmd) {
188 case BIO_CTRL_RESET:
189 if (b->init)
190 ret = EVP_DigestInit_ex(ctx, ctx->digest, NULL);
191 else
192 ret = 0;
193 if (ret > 0)
194 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
195 break;
196 case BIO_C_GET_MD:
197 if (b->init) {
198 ppmd = ptr;
199 *ppmd = ctx->digest;
200 } else
201 ret = 0;
202 break;
203 case BIO_C_GET_MD_CTX:
204 pctx = ptr;
205 *pctx = ctx;
206 b->init = 1;
207 break;
208 case BIO_C_SET_MD_CTX:
209 if (b->init)
210 b->ptr = ptr;
211 else
212 ret = 0;
213 break;
214 case BIO_C_DO_STATE_MACHINE:
215 BIO_clear_retry_flags(b);
216 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
217 BIO_copy_next_retry(b);
218 break;
219
220 case BIO_C_SET_MD:
221 md = ptr;
222 ret = EVP_DigestInit_ex(ctx, md, NULL);
223 if (ret > 0)
224 b->init = 1;
225 break;
226 case BIO_CTRL_DUP:
227 dbio = ptr;
228 dctx = dbio->ptr;
229 if (!EVP_MD_CTX_copy_ex(dctx, ctx))
230 return 0;
231 b->init = 1;
232 break;
233 default:
234 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
235 break;
236 }
237 return (ret);
238}
239
240static long
241md_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
242{
243 long ret = 1;
244
245 if (b->next_bio == NULL)
246 return (0);
247 switch (cmd) {
248 default:
249 ret = BIO_callback_ctrl(b->next_bio, cmd, fp);
250 break;
251 }
252 return (ret);
253}
254
255static int
256md_gets(BIO *bp, char *buf, int size)
257{
258 EVP_MD_CTX *ctx;
259 unsigned int ret;
260
261 ctx = bp->ptr;
262 if (size < ctx->digest->md_size)
263 return (0);
264 if (EVP_DigestFinal_ex(ctx, (unsigned char *)buf, &ret) <= 0)
265 return -1;
266
267 return ((int)ret);
268}
269
270/*
271static int md_puts(bp,str)
272BIO *bp;
273char *str;
274 {
275 return(-1);
276 }
277*/
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