p_seal.c revision 284283
155714Skris/* crypto/evp/p_seal.c */ 255714Skris/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 355714Skris * All rights reserved. 455714Skris * 555714Skris * This package is an SSL implementation written 655714Skris * by Eric Young (eay@cryptsoft.com). 755714Skris * The implementation was written so as to conform with Netscapes SSL. 8280297Sjkim * 955714Skris * This library is free for commercial and non-commercial use as long as 1055714Skris * the following conditions are aheared to. The following conditions 1155714Skris * apply to all code found in this distribution, be it the RC4, RSA, 1255714Skris * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1355714Skris * included with this distribution is covered by the same copyright terms 1455714Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15280297Sjkim * 1655714Skris * Copyright remains Eric Young's, and as such any Copyright notices in 1755714Skris * the code are not to be removed. 1855714Skris * If this package is used in a product, Eric Young should be given attribution 1955714Skris * as the author of the parts of the library used. 2055714Skris * This can be in the form of a textual message at program startup or 2155714Skris * in documentation (online or textual) provided with the package. 22280297Sjkim * 2355714Skris * Redistribution and use in source and binary forms, with or without 2455714Skris * modification, are permitted provided that the following conditions 2555714Skris * are met: 2655714Skris * 1. Redistributions of source code must retain the copyright 2755714Skris * notice, this list of conditions and the following disclaimer. 2855714Skris * 2. Redistributions in binary form must reproduce the above copyright 2955714Skris * notice, this list of conditions and the following disclaimer in the 3055714Skris * documentation and/or other materials provided with the distribution. 3155714Skris * 3. All advertising materials mentioning features or use of this software 3255714Skris * must display the following acknowledgement: 3355714Skris * "This product includes cryptographic software written by 3455714Skris * Eric Young (eay@cryptsoft.com)" 3555714Skris * The word 'cryptographic' can be left out if the rouines from the library 3655714Skris * being used are not cryptographic related :-). 37280297Sjkim * 4. If you include any Windows specific code (or a derivative thereof) from 3855714Skris * the apps directory (application code) you must include an acknowledgement: 3955714Skris * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40280297Sjkim * 4155714Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4255714Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4355714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4455714Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4555714Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4655714Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4755714Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4955714Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5055714Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5155714Skris * SUCH DAMAGE. 52280297Sjkim * 5355714Skris * The licence and distribution terms for any publically available version or 5455714Skris * derivative of this code cannot be changed. i.e. this code cannot simply be 5555714Skris * copied and put under another distribution licence 5655714Skris * [including the GNU Public Licence.] 5755714Skris */ 5855714Skris 5955714Skris#include <stdio.h> 6055714Skris#include "cryptlib.h" 6155714Skris#include <openssl/rand.h> 62109998Smarkm#ifndef OPENSSL_NO_RSA 63280297Sjkim# include <openssl/rsa.h> 6455714Skris#endif 6555714Skris#include <openssl/evp.h> 6655714Skris#include <openssl/objects.h> 6755714Skris#include <openssl/x509.h> 6855714Skris 69280297Sjkimint EVP_SealInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type, 70280297Sjkim unsigned char **ek, int *ekl, unsigned char *iv, 71280297Sjkim EVP_PKEY **pubk, int npubk) 72280297Sjkim{ 73280297Sjkim unsigned char key[EVP_MAX_KEY_LENGTH]; 74280297Sjkim int i; 7555714Skris 76280297Sjkim if (type) { 77280297Sjkim EVP_CIPHER_CTX_init(ctx); 78280297Sjkim if (!EVP_EncryptInit_ex(ctx, type, NULL, NULL, NULL)) 79280297Sjkim return 0; 80280297Sjkim } 81280297Sjkim if ((npubk <= 0) || !pubk) 82280297Sjkim return 1; 83280297Sjkim if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0) 84280297Sjkim return 0; 85284283Sjkim if (EVP_CIPHER_CTX_iv_length(ctx) 86284283Sjkim && RAND_bytes(iv, EVP_CIPHER_CTX_iv_length(ctx)) <= 0) 87284283Sjkim return 0; 8855714Skris 89280297Sjkim if (!EVP_EncryptInit_ex(ctx, NULL, NULL, key, iv)) 90280297Sjkim return 0; 9155714Skris 92280297Sjkim for (i = 0; i < npubk; i++) { 93280297Sjkim ekl[i] = 94280297Sjkim EVP_PKEY_encrypt_old(ek[i], key, EVP_CIPHER_CTX_key_length(ctx), 95280297Sjkim pubk[i]); 96280297Sjkim if (ekl[i] <= 0) 97280297Sjkim return (-1); 98280297Sjkim } 99280297Sjkim return (npubk); 100280297Sjkim} 101280297Sjkim 102280297Sjkim/*- MACRO 10355714Skrisvoid EVP_SealUpdate(ctx,out,outl,in,inl) 10455714SkrisEVP_CIPHER_CTX *ctx; 10555714Skrisunsigned char *out; 10655714Skrisint *outl; 10755714Skrisunsigned char *in; 10855714Skrisint inl; 109280297Sjkim { 110280297Sjkim EVP_EncryptUpdate(ctx,out,outl,in,inl); 111280297Sjkim } 11255714Skris*/ 11355714Skris 114109998Smarkmint EVP_SealFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) 115280297Sjkim{ 116280297Sjkim int i; 117280297Sjkim i = EVP_EncryptFinal_ex(ctx, out, outl); 118280297Sjkim if (i) 119280297Sjkim i = EVP_EncryptInit_ex(ctx, NULL, NULL, NULL, NULL); 120280297Sjkim return i; 121280297Sjkim} 122