1 /* crypto/evp/p_seal.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 #include <openssl/rand.h> 62 #ifndef OPENSSL_NO_RSA 63 #include <openssl/rsa.h> 64 #endif 65 #include <openssl/evp.h> 66 #include <openssl/objects.h> 67 #include <openssl/x509.h> 68 69 int EVP_SealInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type, unsigned char **ek, 70 int *ekl, unsigned char *iv, EVP_PKEY **pubk, int npubk) 71 { 72 unsigned char key[EVP_MAX_KEY_LENGTH]; 73 int i; 74 75 if(type) { 76 EVP_CIPHER_CTX_init(ctx); 77 if(!EVP_EncryptInit_ex(ctx,type,NULL,NULL,NULL)) return 0; 78 } 79 if ((npubk <= 0) || !pubk) 80 return 1; 81 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0) 82 return 0; 83 if (EVP_CIPHER_CTX_iv_length(ctx)) 84 RAND_pseudo_bytes(iv,EVP_CIPHER_CTX_iv_length(ctx)); 85 86 if(!EVP_EncryptInit_ex(ctx,NULL,NULL,key,iv)) return 0; 87 88 for (i=0; i<npubk; i++) 89 { 90 ekl[i]=EVP_PKEY_encrypt(ek[i],key,EVP_CIPHER_CTX_key_length(ctx), 91 pubk[i]); 92 if (ekl[i] <= 0) return(-1); 93 } 94 return(npubk); 95 } 96 97 /* MACRO 98 void EVP_SealUpdate(ctx,out,outl,in,inl) 99 EVP_CIPHER_CTX *ctx; 100 unsigned char *out; 101 int *outl; 102 unsigned char *in; 103 int inl; 104 { 105 EVP_EncryptUpdate(ctx,out,outl,in,inl); 106 } 107 */ 108 109 int EVP_SealFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) 110 { 111 int i; 112 i = EVP_EncryptFinal_ex(ctx,out,outl); 113 EVP_EncryptInit_ex(ctx,NULL,NULL,NULL,NULL); 114 return i; 115 } 116
