155714Skris/* crypto/pem/pem_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. 8296465Sdelphij * 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). 15296465Sdelphij * 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. 22296465Sdelphij * 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 :-). 37296465Sdelphij * 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)" 40296465Sdelphij * 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. 52296465Sdelphij * 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 59296465Sdelphij#include <openssl/opensslconf.h> /* for OPENSSL_NO_RSA */ 60109998Smarkm#ifndef OPENSSL_NO_RSA 61296465Sdelphij# include <stdio.h> 62296465Sdelphij# include "cryptlib.h" 63296465Sdelphij# include <openssl/evp.h> 64296465Sdelphij# include <openssl/rand.h> 65296465Sdelphij# include <openssl/objects.h> 66296465Sdelphij# include <openssl/x509.h> 67296465Sdelphij# include <openssl/pem.h> 68296465Sdelphij# include <openssl/rsa.h> 6955714Skris 7055714Skrisint PEM_SealInit(PEM_ENCODE_SEAL_CTX *ctx, EVP_CIPHER *type, EVP_MD *md_type, 71296465Sdelphij unsigned char **ek, int *ekl, unsigned char *iv, 72296465Sdelphij EVP_PKEY **pubk, int npubk) 73296465Sdelphij{ 74296465Sdelphij unsigned char key[EVP_MAX_KEY_LENGTH]; 75296465Sdelphij int ret = -1; 76296465Sdelphij int i, j, max = 0; 77296465Sdelphij char *s = NULL; 7855714Skris 79296465Sdelphij for (i = 0; i < npubk; i++) { 80296465Sdelphij if (pubk[i]->type != EVP_PKEY_RSA) { 81296465Sdelphij PEMerr(PEM_F_PEM_SEALINIT, PEM_R_PUBLIC_KEY_NO_RSA); 82296465Sdelphij goto err; 83296465Sdelphij } 84296465Sdelphij j = RSA_size(pubk[i]->pkey.rsa); 85296465Sdelphij if (j > max) 86296465Sdelphij max = j; 87296465Sdelphij } 88296465Sdelphij s = (char *)OPENSSL_malloc(max * 2); 89296465Sdelphij if (s == NULL) { 90296465Sdelphij PEMerr(PEM_F_PEM_SEALINIT, ERR_R_MALLOC_FAILURE); 91296465Sdelphij goto err; 92296465Sdelphij } 9355714Skris 94296465Sdelphij EVP_EncodeInit(&ctx->encode); 9555714Skris 96296465Sdelphij EVP_MD_CTX_init(&ctx->md); 97296465Sdelphij EVP_SignInit(&ctx->md, md_type); 98109998Smarkm 99296465Sdelphij EVP_CIPHER_CTX_init(&ctx->cipher); 100296465Sdelphij ret = EVP_SealInit(&ctx->cipher, type, ek, ekl, iv, pubk, npubk); 101296465Sdelphij if (ret <= 0) 102296465Sdelphij goto err; 10355714Skris 104296465Sdelphij /* base64 encode the keys */ 105296465Sdelphij for (i = 0; i < npubk; i++) { 106296465Sdelphij j = EVP_EncodeBlock((unsigned char *)s, ek[i], 107296465Sdelphij RSA_size(pubk[i]->pkey.rsa)); 108296465Sdelphij ekl[i] = j; 109296465Sdelphij memcpy(ek[i], s, j + 1); 110296465Sdelphij } 11155714Skris 112296465Sdelphij ret = npubk; 113296465Sdelphij err: 114296465Sdelphij if (s != NULL) 115296465Sdelphij OPENSSL_free(s); 116296465Sdelphij OPENSSL_cleanse(key, EVP_MAX_KEY_LENGTH); 117296465Sdelphij return (ret); 118296465Sdelphij} 11955714Skris 12055714Skrisvoid PEM_SealUpdate(PEM_ENCODE_SEAL_CTX *ctx, unsigned char *out, int *outl, 121296465Sdelphij unsigned char *in, int inl) 122296465Sdelphij{ 123296465Sdelphij unsigned char buffer[1600]; 124296465Sdelphij int i, j; 12555714Skris 126296465Sdelphij *outl = 0; 127296465Sdelphij EVP_SignUpdate(&ctx->md, in, inl); 128296465Sdelphij for (;;) { 129296465Sdelphij if (inl <= 0) 130296465Sdelphij break; 131296465Sdelphij if (inl > 1200) 132296465Sdelphij i = 1200; 133296465Sdelphij else 134296465Sdelphij i = inl; 135296465Sdelphij EVP_EncryptUpdate(&ctx->cipher, buffer, &j, in, i); 136296465Sdelphij EVP_EncodeUpdate(&ctx->encode, out, &j, buffer, j); 137296465Sdelphij *outl += j; 138296465Sdelphij out += j; 139296465Sdelphij in += i; 140296465Sdelphij inl -= i; 141296465Sdelphij } 142296465Sdelphij} 14355714Skris 14455714Skrisint PEM_SealFinal(PEM_ENCODE_SEAL_CTX *ctx, unsigned char *sig, int *sigl, 145296465Sdelphij unsigned char *out, int *outl, EVP_PKEY *priv) 146296465Sdelphij{ 147296465Sdelphij unsigned char *s = NULL; 148296465Sdelphij int ret = 0, j; 149296465Sdelphij unsigned int i; 15055714Skris 151296465Sdelphij if (priv->type != EVP_PKEY_RSA) { 152296465Sdelphij PEMerr(PEM_F_PEM_SEALFINAL, PEM_R_PUBLIC_KEY_NO_RSA); 153296465Sdelphij goto err; 154296465Sdelphij } 155296465Sdelphij i = RSA_size(priv->pkey.rsa); 156296465Sdelphij if (i < 100) 157296465Sdelphij i = 100; 158296465Sdelphij s = (unsigned char *)OPENSSL_malloc(i * 2); 159296465Sdelphij if (s == NULL) { 160296465Sdelphij PEMerr(PEM_F_PEM_SEALFINAL, ERR_R_MALLOC_FAILURE); 161296465Sdelphij goto err; 162296465Sdelphij } 16355714Skris 164296465Sdelphij EVP_EncryptFinal_ex(&ctx->cipher, s, (int *)&i); 165296465Sdelphij EVP_EncodeUpdate(&ctx->encode, out, &j, s, i); 166296465Sdelphij *outl = j; 167296465Sdelphij out += j; 168296465Sdelphij EVP_EncodeFinal(&ctx->encode, out, &j); 169296465Sdelphij *outl += j; 17055714Skris 171296465Sdelphij if (!EVP_SignFinal(&ctx->md, s, &i, priv)) 172296465Sdelphij goto err; 173296465Sdelphij *sigl = EVP_EncodeBlock(sig, s, i); 17455714Skris 175296465Sdelphij ret = 1; 176296465Sdelphij err: 177296465Sdelphij EVP_MD_CTX_cleanup(&ctx->md); 178296465Sdelphij EVP_CIPHER_CTX_cleanup(&ctx->cipher); 179296465Sdelphij if (s != NULL) 180296465Sdelphij OPENSSL_free(s); 181296465Sdelphij return (ret); 182296465Sdelphij} 183296465Sdelphij#else /* !OPENSSL_NO_RSA */ 18459191Skris 18559191Skris# if PEDANTIC 186296465Sdelphijstatic void *dummy = &dummy; 18759191Skris# endif 18859191Skris 18955714Skris#endif 190