]>
Commit | Line | Data |
---|---|---|
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. | |
0f113f3e | 8 | * |
d02b48c6 RE |
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). | |
0f113f3e | 15 | * |
d02b48c6 RE |
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. | |
0f113f3e | 22 | * |
d02b48c6 RE |
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 :-). | |
0f113f3e | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 40 | * |
d02b48c6 RE |
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. | |
0f113f3e | 52 | * |
d02b48c6 RE |
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> | |
b39fc560 | 60 | #include "internal/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 | ||
875a644a | 69 | void EVP_set_pw_prompt(const char *prompt) |
0f113f3e MC |
70 | { |
71 | if (prompt == NULL) | |
72 | prompt_string[0] = '\0'; | |
73 | else { | |
74 | strncpy(prompt_string, prompt, 79); | |
75 | prompt_string[79] = '\0'; | |
76 | } | |
77 | } | |
d02b48c6 | 78 | |
6b691a5c | 79 | char *EVP_get_pw_prompt(void) |
0f113f3e MC |
80 | { |
81 | if (prompt_string[0] == '\0') | |
82 | return (NULL); | |
83 | else | |
84 | return (prompt_string); | |
85 | } | |
d02b48c6 | 86 | |
0f113f3e MC |
87 | /* |
88 | * For historical reasons, the standard function for reading passwords is in | |
89 | * the DES library -- if someone ever wants to disable DES, this function | |
90 | * will fail | |
91 | */ | |
6b691a5c | 92 | int EVP_read_pw_string(char *buf, int len, const char *prompt, int verify) |
0f113f3e MC |
93 | { |
94 | return EVP_read_pw_string_min(buf, 0, len, prompt, verify); | |
95 | } | |
a63d5eaa | 96 | |
0f113f3e MC |
97 | int EVP_read_pw_string_min(char *buf, int min, int len, const char *prompt, |
98 | int verify) | |
99 | { | |
100 | int ret; | |
101 | char buff[BUFSIZ]; | |
102 | UI *ui; | |
d02b48c6 | 103 | |
0f113f3e MC |
104 | if ((prompt == NULL) && (prompt_string[0] != '\0')) |
105 | prompt = prompt_string; | |
106 | ui = UI_new(); | |
107 | UI_add_input_string(ui, prompt, 0, buf, min, | |
108 | (len >= BUFSIZ) ? BUFSIZ - 1 : len); | |
109 | if (verify) | |
110 | UI_add_verify_string(ui, prompt, 0, | |
111 | buff, min, (len >= BUFSIZ) ? BUFSIZ - 1 : len, | |
112 | buf); | |
113 | ret = UI_process(ui); | |
114 | UI_free(ui); | |
115 | OPENSSL_cleanse(buff, BUFSIZ); | |
116 | return ret; | |
117 | } | |
d02b48c6 | 118 | |
0f113f3e MC |
119 | int EVP_BytesToKey(const EVP_CIPHER *type, const EVP_MD *md, |
120 | const unsigned char *salt, const unsigned char *data, | |
121 | int datal, int count, unsigned char *key, | |
122 | unsigned char *iv) | |
123 | { | |
124 | EVP_MD_CTX c; | |
125 | unsigned char md_buf[EVP_MAX_MD_SIZE]; | |
126 | int niv, nkey, addmd = 0; | |
127 | unsigned int mds = 0, i; | |
128 | int rv = 0; | |
129 | nkey = type->key_len; | |
130 | niv = type->iv_len; | |
131 | OPENSSL_assert(nkey <= EVP_MAX_KEY_LENGTH); | |
132 | OPENSSL_assert(niv <= EVP_MAX_IV_LENGTH); | |
d02b48c6 | 133 | |
0f113f3e MC |
134 | if (data == NULL) |
135 | return (nkey); | |
d02b48c6 | 136 | |
0f113f3e MC |
137 | EVP_MD_CTX_init(&c); |
138 | for (;;) { | |
139 | if (!EVP_DigestInit_ex(&c, md, NULL)) | |
140 | return 0; | |
141 | if (addmd++) | |
142 | if (!EVP_DigestUpdate(&c, &(md_buf[0]), mds)) | |
143 | goto err; | |
144 | if (!EVP_DigestUpdate(&c, data, datal)) | |
145 | goto err; | |
146 | if (salt != NULL) | |
147 | if (!EVP_DigestUpdate(&c, salt, PKCS5_SALT_LEN)) | |
148 | goto err; | |
149 | if (!EVP_DigestFinal_ex(&c, &(md_buf[0]), &mds)) | |
150 | goto err; | |
d02b48c6 | 151 | |
0f113f3e MC |
152 | for (i = 1; i < (unsigned int)count; i++) { |
153 | if (!EVP_DigestInit_ex(&c, md, NULL)) | |
154 | goto err; | |
155 | if (!EVP_DigestUpdate(&c, &(md_buf[0]), mds)) | |
156 | goto err; | |
157 | if (!EVP_DigestFinal_ex(&c, &(md_buf[0]), &mds)) | |
158 | goto err; | |
159 | } | |
160 | i = 0; | |
161 | if (nkey) { | |
162 | for (;;) { | |
163 | if (nkey == 0) | |
164 | break; | |
165 | if (i == mds) | |
166 | break; | |
167 | if (key != NULL) | |
168 | *(key++) = md_buf[i]; | |
169 | nkey--; | |
170 | i++; | |
171 | } | |
172 | } | |
173 | if (niv && (i != mds)) { | |
174 | for (;;) { | |
175 | if (niv == 0) | |
176 | break; | |
177 | if (i == mds) | |
178 | break; | |
179 | if (iv != NULL) | |
180 | *(iv++) = md_buf[i]; | |
181 | niv--; | |
182 | i++; | |
183 | } | |
184 | } | |
185 | if ((nkey == 0) && (niv == 0)) | |
186 | break; | |
187 | } | |
188 | rv = type->key_len; | |
189 | err: | |
190 | EVP_MD_CTX_cleanup(&c); | |
191 | OPENSSL_cleanse(&(md_buf[0]), EVP_MAX_MD_SIZE); | |
192 | return rv; | |
193 | } |