1 /* evp_pbe.c */
2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
3 * project 1999.
4 */
5 /* ====================================================================
6 * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
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
18 * distribution.
19 *
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/)"
24 *
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.
29 *
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.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
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 * ====================================================================
52 *
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).
56 *
57 */
58
59 #include <stdio.h>
60 #include "cryptlib.h"
61 #include <openssl/evp.h>
62 #include <openssl/x509.h>
63
64 /* Password based encryption (PBE) functions */
65
66 static STACK *pbe_algs;
67
68 /* Setup a cipher context from a PBE algorithm */
69
70 typedef struct {
71 int pbe_nid;
72 const EVP_CIPHER *cipher;
73 const EVP_MD *md;
74 EVP_PBE_KEYGEN *keygen;
75 } EVP_PBE_CTL;
76
EVP_PBE_CipherInit(ASN1_OBJECT * pbe_obj,const char * pass,int passlen,ASN1_TYPE * param,EVP_CIPHER_CTX * ctx,int en_de)77 int EVP_PBE_CipherInit(ASN1_OBJECT *pbe_obj, const char *pass, int passlen,
78 ASN1_TYPE *param, EVP_CIPHER_CTX *ctx, int en_de)
79 {
80
81 EVP_PBE_CTL *pbetmp, pbelu;
82 int i;
83 pbelu.pbe_nid = OBJ_obj2nid(pbe_obj);
84 if (pbelu.pbe_nid != NID_undef) i = sk_find(pbe_algs, (char *)&pbelu);
85 else i = -1;
86
87 if (i == -1) {
88 char obj_tmp[80];
89 EVPerr(EVP_F_EVP_PBE_CIPHERINIT,EVP_R_UNKNOWN_PBE_ALGORITHM);
90 if (!pbe_obj) BUF_strlcpy (obj_tmp, "NULL", sizeof obj_tmp);
91 else i2t_ASN1_OBJECT(obj_tmp, sizeof obj_tmp, pbe_obj);
92 ERR_add_error_data(2, "TYPE=", obj_tmp);
93 return 0;
94 }
95 if(!pass) passlen = 0;
96 else if (passlen == -1) passlen = strlen(pass);
97 pbetmp = (EVP_PBE_CTL *)sk_value (pbe_algs, i);
98 i = (*pbetmp->keygen)(ctx, pass, passlen, param, pbetmp->cipher,
99 pbetmp->md, en_de);
100 if (!i) {
101 EVPerr(EVP_F_EVP_PBE_CIPHERINIT,EVP_R_KEYGEN_FAILURE);
102 return 0;
103 }
104 return 1;
105 }
106
pbe_cmp(const char * const * a,const char * const * b)107 static int pbe_cmp(const char * const *a, const char * const *b)
108 {
109 const EVP_PBE_CTL * const *pbe1 = (const EVP_PBE_CTL * const *) a,
110 * const *pbe2 = (const EVP_PBE_CTL * const *)b;
111 return ((*pbe1)->pbe_nid - (*pbe2)->pbe_nid);
112 }
113
114 /* Add a PBE algorithm */
115
EVP_PBE_alg_add(int nid,const EVP_CIPHER * cipher,const EVP_MD * md,EVP_PBE_KEYGEN * keygen)116 int EVP_PBE_alg_add(int nid, const EVP_CIPHER *cipher, const EVP_MD *md,
117 EVP_PBE_KEYGEN *keygen)
118 {
119 EVP_PBE_CTL *pbe_tmp;
120 if (!pbe_algs) pbe_algs = sk_new(pbe_cmp);
121 if (!(pbe_tmp = (EVP_PBE_CTL*) OPENSSL_malloc (sizeof(EVP_PBE_CTL)))) {
122 EVPerr(EVP_F_EVP_PBE_ALG_ADD,ERR_R_MALLOC_FAILURE);
123 return 0;
124 }
125 pbe_tmp->pbe_nid = nid;
126 pbe_tmp->cipher = cipher;
127 pbe_tmp->md = md;
128 pbe_tmp->keygen = keygen;
129 sk_push (pbe_algs, (char *)pbe_tmp);
130 return 1;
131 }
132
EVP_PBE_cleanup(void)133 void EVP_PBE_cleanup(void)
134 {
135 sk_pop_free(pbe_algs, OPENSSL_freeFunc);
136 pbe_algs = NULL;
137 }
138