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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" | |
ec577822 BM |
61 | #include <openssl/x509.h> |
62 | #include <openssl/objects.h> | |
63 | #include <openssl/evp.h> | |
a63d5eaa | 64 | #include <openssl/ui.h> |
d02b48c6 RE |
65 | |
66 | /* should be init to zeros. */ | |
67 | static char prompt_string[80]; | |
68 | ||
6b691a5c | 69 | void EVP_set_pw_prompt(char *prompt) |
d02b48c6 RE |
70 | { |
71 | if (prompt == NULL) | |
72 | prompt_string[0]='\0'; | |
73 | else | |
26414ee0 | 74 | { |
d02b48c6 | 75 | strncpy(prompt_string,prompt,79); |
26414ee0 RL |
76 | prompt_string[79]='\0'; |
77 | } | |
d02b48c6 RE |
78 | } |
79 | ||
6b691a5c | 80 | char *EVP_get_pw_prompt(void) |
d02b48c6 RE |
81 | { |
82 | if (prompt_string[0] == '\0') | |
83 | return(NULL); | |
84 | else | |
85 | return(prompt_string); | |
86 | } | |
87 | ||
63da21c0 BM |
88 | /* For historical reasons, the standard function for reading passwords is |
89 | * in the DES library -- if someone ever wants to disable DES, | |
90 | * this function will fail */ | |
6b691a5c | 91 | int EVP_read_pw_string(char *buf, int len, const char *prompt, int verify) |
d02b48c6 | 92 | { |
a63d5eaa RL |
93 | int ret; |
94 | char buff[BUFSIZ]; | |
95 | UI *ui; | |
96 | ||
d02b48c6 RE |
97 | if ((prompt == NULL) && (prompt_string[0] != '\0')) |
98 | prompt=prompt_string; | |
a63d5eaa RL |
99 | ui = UI_new(); |
100 | UI_add_input_string(ui,prompt,0,buf,0,(len>=BUFSIZ)?BUFSIZ-1:len); | |
101 | if (verify) | |
102 | UI_add_verify_string(ui,prompt,0, | |
103 | buff,0,(len>=BUFSIZ)?BUFSIZ-1:len,buf); | |
104 | ret = UI_process(ui); | |
105 | UI_free(ui); | |
4579924b | 106 | OPENSSL_cleanse(buff,BUFSIZ); |
a63d5eaa | 107 | return ret; |
d02b48c6 RE |
108 | } |
109 | ||
854e076d LJ |
110 | int EVP_BytesToKey(const EVP_CIPHER *type, const EVP_MD *md, |
111 | const unsigned char *salt, const unsigned char *data, int datal, | |
112 | int count, unsigned char *key, unsigned char *iv) | |
d02b48c6 RE |
113 | { |
114 | EVP_MD_CTX c; | |
115 | unsigned char md_buf[EVP_MAX_MD_SIZE]; | |
116 | int niv,nkey,addmd=0; | |
117 | unsigned int mds=0,i; | |
118 | ||
119 | nkey=type->key_len; | |
120 | niv=type->iv_len; | |
54a656ef BL |
121 | OPENSSL_assert(nkey <= EVP_MAX_KEY_LENGTH); |
122 | OPENSSL_assert(niv <= EVP_MAX_IV_LENGTH); | |
d02b48c6 RE |
123 | |
124 | if (data == NULL) return(nkey); | |
125 | ||
dbad1690 | 126 | EVP_MD_CTX_init(&c); |
d02b48c6 RE |
127 | for (;;) |
128 | { | |
20d2186c | 129 | EVP_DigestInit_ex(&c,md, NULL); |
d02b48c6 RE |
130 | if (addmd++) |
131 | EVP_DigestUpdate(&c,&(md_buf[0]),mds); | |
132 | EVP_DigestUpdate(&c,data,datal); | |
133 | if (salt != NULL) | |
f03aa651 | 134 | EVP_DigestUpdate(&c,salt,PKCS5_SALT_LEN); |
20d2186c | 135 | EVP_DigestFinal_ex(&c,&(md_buf[0]),&mds); |
d02b48c6 RE |
136 | |
137 | for (i=1; i<(unsigned int)count; i++) | |
138 | { | |
20d2186c | 139 | EVP_DigestInit_ex(&c,md, NULL); |
d02b48c6 | 140 | EVP_DigestUpdate(&c,&(md_buf[0]),mds); |
20d2186c | 141 | EVP_DigestFinal_ex(&c,&(md_buf[0]),&mds); |
d02b48c6 RE |
142 | } |
143 | i=0; | |
144 | if (nkey) | |
145 | { | |
146 | for (;;) | |
147 | { | |
148 | if (nkey == 0) break; | |
149 | if (i == mds) break; | |
150 | if (key != NULL) | |
151 | *(key++)=md_buf[i]; | |
152 | nkey--; | |
153 | i++; | |
154 | } | |
155 | } | |
156 | if (niv && (i != mds)) | |
157 | { | |
158 | for (;;) | |
159 | { | |
160 | if (niv == 0) break; | |
161 | if (i == mds) break; | |
162 | if (iv != NULL) | |
163 | *(iv++)=md_buf[i]; | |
164 | niv--; | |
165 | i++; | |
166 | } | |
167 | } | |
168 | if ((nkey == 0) && (niv == 0)) break; | |
169 | } | |
dbad1690 | 170 | EVP_MD_CTX_cleanup(&c); |
4579924b | 171 | OPENSSL_cleanse(&(md_buf[0]),EVP_MAX_MD_SIZE); |
58964a49 | 172 | return(type->key_len); |
d02b48c6 RE |
173 | } |
174 |