1 /* p12_decr.c */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) 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/pkcs12.h>
62
63 /* Define this to dump decrypted output to files called DERnnn */
64 /*#define DEBUG_DECRYPT*/
65
66
67 /* Encrypt/Decrypt a buffer based on password and algor, result in a
68 * OPENSSL_malloc'ed buffer
69 */
70
71 unsigned char * PKCS12_pbe_crypt(X509_ALGOR *algor, const char *pass,
72 int passlen, unsigned char *in, int inlen, unsigned char **data,
73 int *datalen, int en_de)
74 {
75 unsigned char *out;
76 int outlen, i;
77 EVP_CIPHER_CTX ctx;
78
79 EVP_CIPHER_CTX_init(&ctx);
80 /* Decrypt data */
81 if (!EVP_PBE_CipherInit(algor->algorithm, pass, passlen,
82 algor->parameter, &ctx, en_de)) {
83 PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,PKCS12_R_PKCS12_ALGOR_CIPHERINIT_ERROR);
84 return NULL;
85 }
86
87 if(!(out = OPENSSL_malloc(inlen + EVP_CIPHER_CTX_block_size(&ctx)))) {
88 PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,ERR_R_MALLOC_FAILURE);
89 goto err;
90 }
91
92 if (!EVP_CipherUpdate(&ctx, out, &i, in, inlen))
93 {
94 OPENSSL_free(out);
95 out = NULL;
96 PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,ERR_R_EVP_LIB);
97 goto err;
98 }
99
100 outlen = i;
101 if(!EVP_CipherFinal_ex(&ctx, out + i, &i)) {
102 OPENSSL_free(out);
103 out = NULL;
104 PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,PKCS12_R_PKCS12_CIPHERFINAL_ERROR);
105 goto err;
106 }
107 outlen += i;
108 if (datalen) *datalen = outlen;
109 if (data) *data = out;
110 err:
111 EVP_CIPHER_CTX_cleanup(&ctx);
112 return out;
113
114 }
115
116 /* Decrypt an OCTET STRING and decode ASN1 structure
117 * if zbuf set zero buffer after use.
118 */
119
120 void * PKCS12_item_decrypt_d2i(X509_ALGOR *algor, const ASN1_ITEM *it,
121 const char *pass, int passlen, ASN1_OCTET_STRING *oct, int zbuf)
122 {
123 unsigned char *out;
124 const unsigned char *p;
125 void *ret;
126 int outlen;
127
128 if (!PKCS12_pbe_crypt(algor, pass, passlen, oct->data, oct->length,
129 &out, &outlen, 0)) {
130 PKCS12err(PKCS12_F_PKCS12_ITEM_DECRYPT_D2I,PKCS12_R_PKCS12_PBE_CRYPT_ERROR);
131 return NULL;
132 }
133 p = out;
134 #ifdef DEBUG_DECRYPT
135 {
136 FILE *op;
137
138 char fname[30];
139 static int fnm = 1;
140 sprintf(fname, "DER%d", fnm++);
141 op = fopen(fname, "wb");
142 fwrite (p, 1, outlen, op);
143 fclose(op);
144 }
145 #endif
146 ret = ASN1_item_d2i(NULL, &p, outlen, it);
147 if (zbuf) OPENSSL_cleanse(out, outlen);
148 if(!ret) PKCS12err(PKCS12_F_PKCS12_ITEM_DECRYPT_D2I,PKCS12_R_DECODE_ERROR);
149 OPENSSL_free(out);
150 return ret;
151 }
152
153 /* Encode ASN1 structure and encrypt, return OCTET STRING
154 * if zbuf set zero encoding.
155 */
156
157 ASN1_OCTET_STRING *PKCS12_item_i2d_encrypt(X509_ALGOR *algor, const ASN1_ITEM *it,
158 const char *pass, int passlen,
159 void *obj, int zbuf)
160 {
161 ASN1_OCTET_STRING *oct;
162 unsigned char *in = NULL;
163 int inlen;
164 if (!(oct = M_ASN1_OCTET_STRING_new ())) {
165 PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,ERR_R_MALLOC_FAILURE);
166 return NULL;
167 }
168 inlen = ASN1_item_i2d(obj, &in, it);
169 if (!in) {
170 PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,PKCS12_R_ENCODE_ERROR);
171 return NULL;
172 }
173 if (!PKCS12_pbe_crypt(algor, pass, passlen, in, inlen, &oct->data,
174 &oct->length, 1)) {
175 PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,PKCS12_R_ENCRYPT_ERROR);
176 OPENSSL_free(in);
177 return NULL;
178 }
179 if (zbuf) OPENSSL_cleanse(in, inlen);
180 OPENSSL_free(in);
181 return oct;
182 }
183
184 IMPLEMENT_PKCS12_STACK_OF(PKCS7)