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git.ipfire.org Git - thirdparty/openssl.git/blob - crypto/evp/evp_key.c
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.]
65 /* should be init to zeros. */
66 static char prompt_string
[80];
68 void EVP_set_pw_prompt(prompt
)
72 prompt_string
[0]='\0';
74 strncpy(prompt_string
,prompt
,79);
77 char *EVP_get_pw_prompt()
79 if (prompt_string
[0] == '\0')
82 return(prompt_string
);
86 int des_read_pw_string(char *buf
,int len
,char *prompt
,int verify
);
89 int EVP_read_pw_string(buf
,len
,prompt
,verify
)
95 if ((prompt
== NULL
) && (prompt_string
[0] != '\0'))
97 return(des_read_pw_string(buf
,len
,prompt
,verify
));
100 int EVP_BytesToKey(type
,md
,salt
,data
,datal
,count
,key
,iv
)
111 unsigned char md_buf
[EVP_MAX_MD_SIZE
];
112 int niv
,nkey
,addmd
=0;
113 unsigned int mds
=0,i
;
118 if (data
== NULL
) return(nkey
);
122 EVP_DigestInit(&c
,md
);
124 EVP_DigestUpdate(&c
,&(md_buf
[0]),mds
);
125 EVP_DigestUpdate(&c
,data
,datal
);
127 EVP_DigestUpdate(&c
,salt
,8);
128 EVP_DigestFinal(&c
,&(md_buf
[0]),&mds
);
130 for (i
=1; i
<(unsigned int)count
; i
++)
132 EVP_DigestInit(&c
,md
);
133 EVP_DigestUpdate(&c
,&(md_buf
[0]),mds
);
134 EVP_DigestFinal(&c
,&(md_buf
[0]),&mds
);
141 if (nkey
== 0) break;
149 if (niv
&& (i
!= mds
))
161 if ((nkey
== 0) && (niv
== 0)) break;
163 memset(&c
,0,sizeof(c
));
164 memset(&(md_buf
[0]),0,EVP_MAX_MD_SIZE
);
165 return(type
->key_len
);