1 /* crypto/evp/evp_key.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
61 #include <openssl/x509.h>
62 #include <openssl/objects.h>
63 #include <openssl/evp.h>
64 #include <openssl/ui.h>
66 /* should be init to zeros. */
67 static char prompt_string[80];
69 void EVP_set_pw_prompt(const char *prompt)
72 prompt_string[0] = '\0';
74 strncpy(prompt_string, prompt, 79);
75 prompt_string[79] = '\0';
79 char *EVP_get_pw_prompt(void)
81 if (prompt_string[0] == '\0')
84 return (prompt_string);
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
92 int EVP_read_pw_string(char *buf, int len, const char *prompt, int verify)
94 return EVP_read_pw_string_min(buf, 0, len, prompt, verify);
97 int EVP_read_pw_string_min(char *buf, int min, int len, const char *prompt,
104 if ((prompt == NULL) && (prompt_string[0] != '\0'))
105 prompt = prompt_string;
107 UI_add_input_string(ui, prompt, 0, buf, min,
108 (len >= BUFSIZ) ? BUFSIZ - 1 : len);
110 UI_add_verify_string(ui, prompt, 0,
111 buff, min, (len >= BUFSIZ) ? BUFSIZ - 1 : len,
113 ret = UI_process(ui);
115 OPENSSL_cleanse(buff, BUFSIZ);
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,
125 unsigned char md_buf[EVP_MAX_MD_SIZE];
126 int niv, nkey, addmd = 0;
127 unsigned int mds = 0, i;
129 nkey = type->key_len;
131 OPENSSL_assert(nkey <= EVP_MAX_KEY_LENGTH);
132 OPENSSL_assert(niv <= EVP_MAX_IV_LENGTH);
139 if (!EVP_DigestInit_ex(&c, md, NULL))
142 if (!EVP_DigestUpdate(&c, &(md_buf[0]), mds))
144 if (!EVP_DigestUpdate(&c, data, datal))
147 if (!EVP_DigestUpdate(&c, salt, PKCS5_SALT_LEN))
149 if (!EVP_DigestFinal_ex(&c, &(md_buf[0]), &mds))
152 for (i = 1; i < (unsigned int)count; i++) {
153 if (!EVP_DigestInit_ex(&c, md, NULL))
155 if (!EVP_DigestUpdate(&c, &(md_buf[0]), mds))
157 if (!EVP_DigestFinal_ex(&c, &(md_buf[0]), &mds))
168 *(key++) = md_buf[i];
173 if (niv && (i != mds)) {
185 if ((nkey == 0) && (niv == 0))
190 EVP_MD_CTX_cleanup(&c);
191 OPENSSL_cleanse(&(md_buf[0]), EVP_MAX_MD_SIZE);