1 /* crypto/evp/p_open.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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_old(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 128
