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d02b48c6 | 1 | /* crypto/evp/evp_key.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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. */ | |
66 | static char prompt_string[80]; | |
67 | ||
68 | void EVP_set_pw_prompt(prompt) | |
69 | char *prompt; | |
70 | { | |
71 | if (prompt == NULL) | |
72 | prompt_string[0]='\0'; | |
73 | else | |
74 | strncpy(prompt_string,prompt,79); | |
75 | } | |
76 | ||
77 | char *EVP_get_pw_prompt() | |
78 | { | |
79 | if (prompt_string[0] == '\0') | |
80 | return(NULL); | |
81 | else | |
82 | return(prompt_string); | |
83 | } | |
84 | ||
58964a49 RE |
85 | #ifdef NO_DES |
86 | int des_read_pw_string(char *buf,int len,char *prompt,int verify); | |
87 | #endif | |
88 | ||
d02b48c6 RE |
89 | int EVP_read_pw_string(buf,len,prompt,verify) |
90 | char *buf; | |
91 | int len; | |
92 | char *prompt; | |
93 | int 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 | ||
100 | int EVP_BytesToKey(type,md,salt,data,datal,count,key,iv) | |
101 | EVP_CIPHER *type; | |
102 | EVP_MD *md; | |
103 | unsigned char *salt; | |
104 | unsigned char *data; | |
105 | int datal; | |
106 | int count; | |
107 | unsigned char *key; | |
108 | unsigned 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); | |
58964a49 | 165 | return(type->key_len); |
d02b48c6 RE |
166 | } |
167 |