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diff --git a/src/lib/libcrypto/evp/evp_key.c b/src/lib/libcrypto/evp/evp_key.c
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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 <openssl/x509.h>
62#include <openssl/objects.h>
63#include <openssl/evp.h>
64
65/* should be init to zeros. */
66static char prompt_string[80];
67
68void EVP_set_pw_prompt(char *prompt)
69 {
70 if (prompt == NULL)
71 prompt_string[0]='\0';
72 else
73 strncpy(prompt_string,prompt,79);
74 }
75
76char *EVP_get_pw_prompt(void)
77 {
78 if (prompt_string[0] == '\0')
79 return(NULL);
80 else
81 return(prompt_string);
82 }
83
84/* For historical reasons, the standard function for reading passwords is
85 * in the DES library -- if someone ever wants to disable DES,
86 * this function will fail */
87int EVP_read_pw_string(char *buf, int len, const char *prompt, int verify)
88 {
89#ifndef NO_DES
90 if ((prompt == NULL) && (prompt_string[0] != '\0'))
91 prompt=prompt_string;
92 return(des_read_pw_string(buf,len,prompt,verify));
93#else
94 return -1;
95#endif
96 }
97
98int EVP_BytesToKey(const EVP_CIPHER *type, EVP_MD *md,
99 const unsigned char *salt, const unsigned char *data, int datal,
100 int count, unsigned char *key, unsigned char *iv)
101 {
102 EVP_MD_CTX c;
103 unsigned char md_buf[EVP_MAX_MD_SIZE];
104 int niv,nkey,addmd=0;
105 unsigned int mds=0,i;
106
107 nkey=type->key_len;
108 niv=type->iv_len;
109
110 if (data == NULL) return(nkey);
111
112 for (;;)
113 {
114 EVP_DigestInit(&c,md);
115 if (addmd++)
116 EVP_DigestUpdate(&c,&(md_buf[0]),mds);
117 EVP_DigestUpdate(&c,data,datal);
118 if (salt != NULL)
119 EVP_DigestUpdate(&c,salt,PKCS5_SALT_LEN);
120 EVP_DigestFinal(&c,&(md_buf[0]),&mds);
121
122 for (i=1; i<(unsigned int)count; i++)
123 {
124 EVP_DigestInit(&c,md);
125 EVP_DigestUpdate(&c,&(md_buf[0]),mds);
126 EVP_DigestFinal(&c,&(md_buf[0]),&mds);
127 }
128 i=0;
129 if (nkey)
130 {
131 for (;;)
132 {
133 if (nkey == 0) break;
134 if (i == mds) break;
135 if (key != NULL)
136 *(key++)=md_buf[i];
137 nkey--;
138 i++;
139 }
140 }
141 if (niv && (i != mds))
142 {
143 for (;;)
144 {
145 if (niv == 0) break;
146 if (i == mds) break;
147 if (iv != NULL)
148 *(iv++)=md_buf[i];
149 niv--;
150 i++;
151 }
152 }
153 if ((nkey == 0) && (niv == 0)) break;
154 }
155 memset(&c,0,sizeof(c));
156 memset(&(md_buf[0]),0,EVP_MAX_MD_SIZE);
157 return(type->key_len);
158 }
159
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