Line data Source code
1 : /* p12_decr.c */
2 : /*
3 : * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
4 : * 1999.
5 : */
6 : /* ====================================================================
7 : * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
8 : *
9 : * Redistribution and use in source and binary forms, with or without
10 : * modification, are permitted provided that the following conditions
11 : * are met:
12 : *
13 : * 1. Redistributions of source code must retain the above copyright
14 : * notice, this list of conditions and the following disclaimer.
15 : *
16 : * 2. Redistributions in binary form must reproduce the above copyright
17 : * notice, this list of conditions and the following disclaimer in
18 : * the documentation and/or other materials provided with the
19 : * distribution.
20 : *
21 : * 3. All advertising materials mentioning features or use of this
22 : * software must display the following acknowledgment:
23 : * "This product includes software developed by the OpenSSL Project
24 : * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 : *
26 : * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 : * endorse or promote products derived from this software without
28 : * prior written permission. For written permission, please contact
29 : * licensing@OpenSSL.org.
30 : *
31 : * 5. Products derived from this software may not be called "OpenSSL"
32 : * nor may "OpenSSL" appear in their names without prior written
33 : * permission of the OpenSSL Project.
34 : *
35 : * 6. Redistributions of any form whatsoever must retain the following
36 : * acknowledgment:
37 : * "This product includes software developed by the OpenSSL Project
38 : * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 : *
40 : * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 : * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 : * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 : * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 : * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 : * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 : * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 : * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 : * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 : * OF THE POSSIBILITY OF SUCH DAMAGE.
52 : * ====================================================================
53 : *
54 : * This product includes cryptographic software written by Eric Young
55 : * (eay@cryptsoft.com). This product includes software written by Tim
56 : * Hudson (tjh@cryptsoft.com).
57 : *
58 : */
59 :
60 : #include <stdio.h>
61 : #include "cryptlib.h"
62 : #include <openssl/pkcs12.h>
63 :
64 : /* Define this to dump decrypted output to files called DERnnn */
65 : /*
66 : * #define DEBUG_DECRYPT
67 : */
68 :
69 : /*
70 : * Encrypt/Decrypt a buffer based on password and algor, result in a
71 : * OPENSSL_malloc'ed buffer
72 : */
73 :
74 0 : unsigned char *PKCS12_pbe_crypt(X509_ALGOR *algor, const char *pass,
75 : int passlen, unsigned char *in, int inlen,
76 : unsigned char **data, int *datalen, int en_de)
77 : {
78 : unsigned char *out;
79 : int outlen, i;
80 : EVP_CIPHER_CTX ctx;
81 :
82 0 : EVP_CIPHER_CTX_init(&ctx);
83 : /* Decrypt data */
84 0 : if (!EVP_PBE_CipherInit(algor->algorithm, pass, passlen,
85 : algor->parameter, &ctx, en_de)) {
86 0 : PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,
87 : PKCS12_R_PKCS12_ALGOR_CIPHERINIT_ERROR);
88 0 : return NULL;
89 : }
90 :
91 0 : if (!(out = OPENSSL_malloc(inlen + EVP_CIPHER_CTX_block_size(&ctx)))) {
92 0 : PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT, ERR_R_MALLOC_FAILURE);
93 0 : goto err;
94 : }
95 :
96 0 : if (!EVP_CipherUpdate(&ctx, out, &i, in, inlen)) {
97 0 : OPENSSL_free(out);
98 : out = NULL;
99 0 : PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT, ERR_R_EVP_LIB);
100 0 : goto err;
101 : }
102 :
103 0 : outlen = i;
104 0 : if (!EVP_CipherFinal_ex(&ctx, out + i, &i)) {
105 0 : OPENSSL_free(out);
106 : out = NULL;
107 0 : PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,
108 : PKCS12_R_PKCS12_CIPHERFINAL_ERROR);
109 0 : goto err;
110 : }
111 0 : outlen += i;
112 0 : if (datalen)
113 0 : *datalen = outlen;
114 0 : if (data)
115 0 : *data = out;
116 : err:
117 0 : EVP_CIPHER_CTX_cleanup(&ctx);
118 0 : return out;
119 :
120 : }
121 :
122 : /*
123 : * Decrypt an OCTET STRING and decode ASN1 structure if zbuf set zero buffer
124 : * after use.
125 : */
126 :
127 0 : void *PKCS12_item_decrypt_d2i(X509_ALGOR *algor, const ASN1_ITEM *it,
128 : const char *pass, int passlen,
129 : ASN1_OCTET_STRING *oct, int zbuf)
130 : {
131 : unsigned char *out;
132 : const unsigned char *p;
133 : void *ret;
134 : int outlen;
135 :
136 0 : if (!PKCS12_pbe_crypt(algor, pass, passlen, oct->data, oct->length,
137 : &out, &outlen, 0)) {
138 0 : PKCS12err(PKCS12_F_PKCS12_ITEM_DECRYPT_D2I,
139 : PKCS12_R_PKCS12_PBE_CRYPT_ERROR);
140 0 : return NULL;
141 : }
142 0 : p = out;
143 : #ifdef DEBUG_DECRYPT
144 : {
145 : FILE *op;
146 :
147 : char fname[30];
148 : static int fnm = 1;
149 : sprintf(fname, "DER%d", fnm++);
150 : op = fopen(fname, "wb");
151 : fwrite(p, 1, outlen, op);
152 : fclose(op);
153 : }
154 : #endif
155 0 : ret = ASN1_item_d2i(NULL, &p, outlen, it);
156 0 : if (zbuf)
157 0 : OPENSSL_cleanse(out, outlen);
158 0 : if (!ret)
159 0 : PKCS12err(PKCS12_F_PKCS12_ITEM_DECRYPT_D2I, PKCS12_R_DECODE_ERROR);
160 0 : OPENSSL_free(out);
161 0 : return ret;
162 : }
163 :
164 : /*
165 : * Encode ASN1 structure and encrypt, return OCTET STRING if zbuf set zero
166 : * encoding.
167 : */
168 :
169 0 : ASN1_OCTET_STRING *PKCS12_item_i2d_encrypt(X509_ALGOR *algor,
170 : const ASN1_ITEM *it,
171 : const char *pass, int passlen,
172 : void *obj, int zbuf)
173 : {
174 : ASN1_OCTET_STRING *oct = NULL;
175 0 : unsigned char *in = NULL;
176 : int inlen;
177 0 : if (!(oct = M_ASN1_OCTET_STRING_new())) {
178 0 : PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT, ERR_R_MALLOC_FAILURE);
179 0 : goto err;
180 : }
181 0 : inlen = ASN1_item_i2d(obj, &in, it);
182 0 : if (!in) {
183 0 : PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT, PKCS12_R_ENCODE_ERROR);
184 0 : goto err;
185 : }
186 0 : if (!PKCS12_pbe_crypt(algor, pass, passlen, in, inlen, &oct->data,
187 : &oct->length, 1)) {
188 0 : PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT, PKCS12_R_ENCRYPT_ERROR);
189 0 : OPENSSL_free(in);
190 0 : goto err;
191 : }
192 0 : if (zbuf)
193 0 : OPENSSL_cleanse(in, inlen);
194 0 : OPENSSL_free(in);
195 0 : return oct;
196 : err:
197 0 : if (oct)
198 0 : ASN1_OCTET_STRING_free(oct);
199 : return NULL;
200 : }
201 :
202 : IMPLEMENT_PKCS12_STACK_OF(PKCS7)
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