1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.]
60 #include "internal/cryptlib.h"
61 #include <openssl/buffer.h>
62 #include <openssl/evp.h>
63 #include "internal/evp_int.h"
65 #include "internal/bio.h"
68 * BIO_put and BIO_get both add to the digest, BIO_gets returns the digest
71 static int md_write(BIO *h, char const *buf, int num);
72 static int md_read(BIO *h, char *buf, int size);
74 * static int md_puts(BIO *h, const char *str);
76 static int md_gets(BIO *h, char *str, int size);
77 static long md_ctrl(BIO *h, int cmd, long arg1, void *arg2);
78 static int md_new(BIO *h);
79 static int md_free(BIO *data);
80 static long md_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp);
82 static const BIO_METHOD methods_md = {
83 BIO_TYPE_MD, "message digest",
94 const BIO_METHOD *BIO_f_md(void)
99 static int md_new(BIO *bi)
103 ctx = EVP_MD_CTX_new();
108 BIO_set_data(bi, ctx);
113 static int md_free(BIO *a)
117 EVP_MD_CTX_free(BIO_get_data(a));
118 BIO_set_data(a, NULL);
124 static int md_read(BIO *b, char *out, int outl)
133 ctx = BIO_get_data(b);
136 if ((ctx == NULL) || (next == NULL))
139 ret = BIO_read(next, out, outl);
140 if (BIO_get_init(b)) {
142 if (EVP_DigestUpdate(ctx, (unsigned char *)out,
143 (unsigned int)ret) <= 0)
147 BIO_clear_retry_flags(b);
148 BIO_copy_next_retry(b);
152 static int md_write(BIO *b, const char *in, int inl)
158 if ((in == NULL) || (inl <= 0))
161 ctx = BIO_get_data(b);
163 if ((ctx != NULL) && (next != NULL))
164 ret = BIO_write(next, in, inl);
166 if (BIO_get_init(b)) {
168 if (!EVP_DigestUpdate(ctx, (const unsigned char *)in,
169 (unsigned int)ret)) {
170 BIO_clear_retry_flags(b);
176 BIO_clear_retry_flags(b);
177 BIO_copy_next_retry(b);
182 static long md_ctrl(BIO *b, int cmd, long num, void *ptr)
184 EVP_MD_CTX *ctx, *dctx, **pctx;
191 ctx = BIO_get_data(b);
197 ret = EVP_DigestInit_ex(ctx, ctx->digest, NULL);
201 ret = BIO_ctrl(next, cmd, num, ptr);
204 if (BIO_get_init(b)) {
210 case BIO_C_GET_MD_CTX:
215 case BIO_C_SET_MD_CTX:
217 BIO_set_data(b, ptr);
221 case BIO_C_DO_STATE_MACHINE:
222 BIO_clear_retry_flags(b);
223 ret = BIO_ctrl(next, cmd, num, ptr);
224 BIO_copy_next_retry(b);
229 ret = EVP_DigestInit_ex(ctx, md, NULL);
235 dctx = BIO_get_data(dbio);
236 if (!EVP_MD_CTX_copy_ex(dctx, ctx))
241 ret = BIO_ctrl(next, cmd, num, ptr);
247 static long md_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
259 ret = BIO_callback_ctrl(next, cmd, fp);
265 static int md_gets(BIO *bp, char *buf, int size)
270 ctx = BIO_get_data(bp);
272 if (size < ctx->digest->md_size)
275 if (EVP_DigestFinal_ex(ctx, (unsigned char *)buf, &ret) <= 0)