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3e575651 SL |
1 | /* crypto/evp/p_open.c */ |
2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | |
3 | * All rights reserved. | |
4 | * | |
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. | |
8 | * | |
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). | |
15 | * | |
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. | |
22 | * | |
23 | * Redistribution and use in source and binary forms, with or without | |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
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)" | |
40 | * | |
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 | |
51 | * SUCH DAMAGE. | |
52 | * | |
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.] | |
57 | */ | |
58 | ||
59 | #include <stdio.h> | |
60 | #include "cryptlib.h" | |
61 | ||
62 | #ifndef OPENSSL_NO_RSA | |
63 | ||
64 | #include <openssl/evp.h> | |
65 | #include <openssl/objects.h> | |
66 | #include <openssl/x509.h> | |
67 | #include <openssl/rsa.h> | |
68 | ||
69 | int EVP_OpenInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type, | |
70 | const unsigned char *ek, int ekl, const unsigned char *iv, | |
71 | EVP_PKEY *priv) | |
72 | { | |
73 | unsigned char *key=NULL; | |
74 | int i,size=0,ret=0; | |
75 | ||
76 | if(type) { | |
77 | EVP_CIPHER_CTX_init(ctx); | |
78 | if(!EVP_DecryptInit_ex(ctx,type,NULL, NULL,NULL)) return 0; | |
79 | } | |
80 | ||
81 | if(!priv) return 1; | |
82 | ||
83 | if (priv->type != EVP_PKEY_RSA) | |
84 | { | |
85 | EVPerr(EVP_F_EVP_OPENINIT,EVP_R_PUBLIC_KEY_NOT_RSA); | |
86 | goto err; | |
87 | } | |
88 | ||
89 | size=RSA_size(priv->pkey.rsa); | |
90 | key=(unsigned char *)OPENSSL_malloc(size+2); | |
91 | if (key == NULL) | |
92 | { | |
93 | /* ERROR */ | |
94 | EVPerr(EVP_F_EVP_OPENINIT,ERR_R_MALLOC_FAILURE); | |
95 | goto err; | |
96 | } | |
97 | ||
98 | i=EVP_PKEY_decrypt(key,ek,ekl,priv); | |
99 | if ((i <= 0) || !EVP_CIPHER_CTX_set_key_length(ctx, i)) | |
100 | { | |
101 | /* ERROR */ | |
102 | goto err; | |
103 | } | |
104 | if(!EVP_DecryptInit_ex(ctx,NULL,NULL,key,iv)) goto err; | |
105 | ||
106 | ret=1; | |
107 | err: | |
108 | if (key != NULL) OPENSSL_cleanse(key,size); | |
109 | OPENSSL_free(key); | |
110 | return(ret); | |
111 | } | |
112 | ||
113 | int EVP_OpenFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
114 | { | |
115 | int i; | |
116 | ||
117 | i=EVP_DecryptFinal_ex(ctx,out,outl); | |
118 | EVP_DecryptInit_ex(ctx,NULL,NULL,NULL,NULL); | |
119 | return(i); | |
120 | } | |
121 | #else /* !OPENSSL_NO_RSA */ | |
122 | ||
123 | # ifdef PEDANTIC | |
124 | static void *dummy=&dummy; | |
125 | # endif | |
126 | ||
127 | #endif |