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authorcvs2svn <admin@example.com>1999-10-10 21:32:03 +0000
committercvs2svn <admin@example.com>1999-10-10 21:32:03 +0000
commit14e61fef302fbc25ab63e38bd35445637ca68139 (patch)
treedae5e50679bccd1ed8d7d4041fbb9f3d96bbc98c /src/lib/libcrypto/evp/bio_md.c
parent3ef9529fbf0c1f8f1c9da1172e92ad3370d5fcfe (diff)
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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/* crypto/evp/bio_md.c */
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#include "cryptlib.h"
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 *buf,int num);
69static int md_read(BIO *h,char *buf,int size);
70/*static int md_puts(BIO *h,char *str); */
71static int md_gets(BIO *h,char *str,int size);
72static long md_ctrl(BIO *h,int cmd,long arg1,char *arg2);
73static int md_new(BIO *h);
74static int md_free(BIO *data);
75static BIO_METHOD methods_md=
76 {
77 BIO_TYPE_MD,"message digest",
78 md_write,
79 md_read,
80 NULL, /* md_puts, */
81 md_gets,
82 md_ctrl,
83 md_new,
84 md_free,
85 };
86
87BIO_METHOD *BIO_f_md(void)
88 {
89 return(&methods_md);
90 }
91
92static int md_new(BIO *bi)
93 {
94 EVP_MD_CTX *ctx;
95
96 ctx=(EVP_MD_CTX *)Malloc(sizeof(EVP_MD_CTX));
97 if (ctx == NULL) return(0);
98
99 bi->init=0;
100 bi->ptr=(char *)ctx;
101 bi->flags=0;
102 return(1);
103 }
104
105static int md_free(BIO *a)
106 {
107 if (a == NULL) return(0);
108 Free(a->ptr);
109 a->ptr=NULL;
110 a->init=0;
111 a->flags=0;
112 return(1);
113 }
114
115static int md_read(BIO *b, char *out, int outl)
116 {
117 int ret=0;
118 EVP_MD_CTX *ctx;
119
120 if (out == NULL) return(0);
121 ctx=(EVP_MD_CTX *)b->ptr;
122
123 if ((ctx == NULL) || (b->next_bio == NULL)) return(0);
124
125 ret=BIO_read(b->next_bio,out,outl);
126 if (b->init)
127 {
128 if (ret > 0)
129 {
130 EVP_DigestUpdate(ctx,(unsigned char *)out,
131 (unsigned int)ret);
132 }
133 }
134 BIO_clear_retry_flags(b);
135 BIO_copy_next_retry(b);
136 return(ret);
137 }
138
139static int md_write(BIO *b, char *in, int inl)
140 {
141 int ret=0;
142 EVP_MD_CTX *ctx;
143
144 if ((in == NULL) || (inl <= 0)) return(0);
145 ctx=(EVP_MD_CTX *)b->ptr;
146
147 if ((ctx != NULL) && (b->next_bio != NULL))
148 ret=BIO_write(b->next_bio,in,inl);
149 if (b->init)
150 {
151 if (ret > 0)
152 {
153 EVP_DigestUpdate(ctx,(unsigned char *)in,
154 (unsigned int)ret);
155 }
156 }
157 BIO_clear_retry_flags(b);
158 BIO_copy_next_retry(b);
159 return(ret);
160 }
161
162static long md_ctrl(BIO *b, int cmd, long num, char *ptr)
163 {
164 EVP_MD_CTX *ctx,*dctx,**pctx;
165 const EVP_MD **ppmd;
166 EVP_MD *md;
167 long ret=1;
168 BIO *dbio;
169
170 ctx=(EVP_MD_CTX *)b->ptr;
171
172 switch (cmd)
173 {
174 case BIO_CTRL_RESET:
175 if (b->init)
176 EVP_DigestInit(ctx,ctx->digest);
177 else
178 ret=0;
179 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
180 break;
181 case BIO_C_GET_MD:
182 if (b->init)
183 {
184 ppmd=(const EVP_MD **)ptr;
185 *ppmd=ctx->digest;
186 }
187 else
188 ret=0;
189 break;
190 case BIO_C_GET_MD_CTX:
191 if (b->init)
192 {
193 pctx=(EVP_MD_CTX **)ptr;
194 *pctx=ctx;
195 }
196 else
197 ret=0;
198 break;
199 case BIO_C_DO_STATE_MACHINE:
200 BIO_clear_retry_flags(b);
201 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
202 BIO_copy_next_retry(b);
203 break;
204
205 case BIO_C_SET_MD:
206 md=(EVP_MD *)ptr;
207 EVP_DigestInit(ctx,md);
208 b->init=1;
209 break;
210 case BIO_CTRL_DUP:
211 dbio=(BIO *)ptr;
212 dctx=(EVP_MD_CTX *)dbio->ptr;
213 memcpy(dctx,ctx,sizeof(ctx));
214 b->init=1;
215 break;
216 default:
217 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
218 break;
219 }
220 return(ret);
221 }
222
223static int md_gets(BIO *bp, char *buf, int size)
224 {
225 EVP_MD_CTX *ctx;
226 unsigned int ret;
227
228
229 ctx=(EVP_MD_CTX *)bp->ptr;
230 if (size < ctx->digest->md_size)
231 return(0);
232 EVP_DigestFinal(ctx,(unsigned char *)buf,&ret);
233 return((int)ret);
234 }
235
236/*
237static int md_puts(bp,str)
238BIO *bp;
239char *str;
240 {
241 return(-1);
242 }
243*/
244
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