]>
git.ipfire.org Git - thirdparty/openssl.git/blob - crypto/evp/p5_crpt.c
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
62 #include <openssl/x509.h>
63 #include <openssl/evp.h>
65 /* Doesn't do anything now: Builtin PBE algorithms in static table.
68 void PKCS5_PBE_add(void)
72 int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX
*cctx
, const char *pass
, int passlen
,
73 ASN1_TYPE
*param
, const EVP_CIPHER
*cipher
, const EVP_MD
*md
,
77 unsigned char md_tmp
[EVP_MAX_MD_SIZE
];
78 unsigned char key
[EVP_MAX_KEY_LENGTH
], iv
[EVP_MAX_IV_LENGTH
];
83 const unsigned char *pbuf
;
85 /* Extract useful info from parameter */
86 if (param
== NULL
|| param
->type
!= V_ASN1_SEQUENCE
||
87 param
->value
.sequence
== NULL
) {
88 EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN
,EVP_R_DECODE_ERROR
);
92 pbuf
= param
->value
.sequence
->data
;
93 if (!(pbe
= d2i_PBEPARAM(NULL
, &pbuf
, param
->value
.sequence
->length
))) {
94 EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN
,EVP_R_DECODE_ERROR
);
98 if (!pbe
->iter
) iter
= 1;
99 else iter
= ASN1_INTEGER_get (pbe
->iter
);
100 salt
= pbe
->salt
->data
;
101 saltlen
= pbe
->salt
->length
;
103 if(!pass
) passlen
= 0;
104 else if(passlen
== -1) passlen
= strlen(pass
);
106 EVP_MD_CTX_init(&ctx
);
107 EVP_DigestInit_ex(&ctx
, md
, NULL
);
108 EVP_DigestUpdate(&ctx
, pass
, passlen
);
109 EVP_DigestUpdate(&ctx
, salt
, saltlen
);
111 EVP_DigestFinal_ex(&ctx
, md_tmp
, NULL
);
112 for (i
= 1; i
< iter
; i
++) {
113 EVP_DigestInit_ex(&ctx
, md
, NULL
);
114 EVP_DigestUpdate(&ctx
, md_tmp
, EVP_MD_size(md
));
115 EVP_DigestFinal_ex (&ctx
, md_tmp
, NULL
);
117 EVP_MD_CTX_cleanup(&ctx
);
118 OPENSSL_assert(EVP_CIPHER_key_length(cipher
) <= (int)sizeof(md_tmp
));
119 memcpy(key
, md_tmp
, EVP_CIPHER_key_length(cipher
));
120 OPENSSL_assert(EVP_CIPHER_iv_length(cipher
) <= 16);
121 memcpy(iv
, md_tmp
+ (16 - EVP_CIPHER_iv_length(cipher
)),
122 EVP_CIPHER_iv_length(cipher
));
123 EVP_CipherInit_ex(cctx
, cipher
, NULL
, key
, iv
, en_de
);
124 OPENSSL_cleanse(md_tmp
, EVP_MAX_MD_SIZE
);
125 OPENSSL_cleanse(key
, EVP_MAX_KEY_LENGTH
);
126 OPENSSL_cleanse(iv
, EVP_MAX_IV_LENGTH
);