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1/* crypto/evp/evp_key.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 "cryptlib.h"
61#include "x509.h"
62#include "objects.h"
63#include "evp.h"
64
65/* should be init to zeros. */
66static char prompt_string[80];
67
68void EVP_set_pw_prompt(prompt)
69char *prompt;
70 {
71 if (prompt == NULL)
72 prompt_string[0]='\0';
73 else
74 strncpy(prompt_string,prompt,79);
75 }
76
77char *EVP_get_pw_prompt()
78 {
79 if (prompt_string[0] == '\0')
80 return(NULL);
81 else
82 return(prompt_string);
83 }
84
85#ifdef NO_DES
86int des_read_pw_string(char *buf,int len,char *prompt,int verify);
87#endif
88
89int EVP_read_pw_string(buf,len,prompt,verify)
90char *buf;
91int len;
92char *prompt;
93int verify;
94 {
95 if ((prompt == NULL) && (prompt_string[0] != '\0'))
96 prompt=prompt_string;
97 return(des_read_pw_string(buf,len,prompt,verify));
98 }
99
100int EVP_BytesToKey(type,md,salt,data,datal,count,key,iv)
101EVP_CIPHER *type;
102EVP_MD *md;
103unsigned char *salt;
104unsigned char *data;
105int datal;
106int count;
107unsigned char *key;
108unsigned char *iv;
109 {
110 EVP_MD_CTX c;
111 unsigned char md_buf[EVP_MAX_MD_SIZE];
112 int niv,nkey,addmd=0;
113 unsigned int mds=0,i;
114
115 nkey=type->key_len;
116 niv=type->iv_len;
117
118 if (data == NULL) return(nkey);
119
120 for (;;)
121 {
122 EVP_DigestInit(&c,md);
123 if (addmd++)
124 EVP_DigestUpdate(&c,&(md_buf[0]),mds);
125 EVP_DigestUpdate(&c,data,datal);
126 if (salt != NULL)
127 EVP_DigestUpdate(&c,salt,8);
128 EVP_DigestFinal(&c,&(md_buf[0]),&mds);
129
130 for (i=1; i<(unsigned int)count; i++)
131 {
132 EVP_DigestInit(&c,md);
133 EVP_DigestUpdate(&c,&(md_buf[0]),mds);
134 EVP_DigestFinal(&c,&(md_buf[0]),&mds);
135 }
136 i=0;
137 if (nkey)
138 {
139 for (;;)
140 {
141 if (nkey == 0) break;
142 if (i == mds) break;
143 if (key != NULL)
144 *(key++)=md_buf[i];
145 nkey--;
146 i++;
147 }
148 }
149 if (niv && (i != mds))
150 {
151 for (;;)
152 {
153 if (niv == 0) break;
154 if (i == mds) break;
155 if (iv != NULL)
156 *(iv++)=md_buf[i];
157 niv--;
158 i++;
159 }
160 }
161 if ((nkey == 0) && (niv == 0)) break;
162 }
163 memset(&c,0,sizeof(c));
164 memset(&(md_buf[0]),0,EVP_MAX_MD_SIZE);
165 return(type->key_len);
166 }
167
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