130 lines
4.7 KiB
C
130 lines
4.7 KiB
C
/* crypto/evp/p_open.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <stdio.h>
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#include "cryptlib.h"
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#ifndef OPENSSL_NO_RSA
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# include <openssl/evp.h>
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# include <openssl/objects.h>
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# include <openssl/x509.h>
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# include <openssl/rsa.h>
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int EVP_OpenInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type,
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const unsigned char *ek, int ekl, const unsigned char *iv,
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EVP_PKEY *priv)
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{
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unsigned char *key = NULL;
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int i, size = 0, ret = 0;
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if (type) {
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EVP_CIPHER_CTX_init(ctx);
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if (!EVP_DecryptInit_ex(ctx, type, NULL, NULL, NULL))
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return 0;
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}
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if (!priv)
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return 1;
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if (priv->type != EVP_PKEY_RSA) {
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EVPerr(EVP_F_EVP_OPENINIT, EVP_R_PUBLIC_KEY_NOT_RSA);
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goto err;
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}
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size = RSA_size(priv->pkey.rsa);
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key = (unsigned char *)OPENSSL_malloc(size + 2);
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if (key == NULL) {
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/* ERROR */
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EVPerr(EVP_F_EVP_OPENINIT, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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i = EVP_PKEY_decrypt_old(key, ek, ekl, priv);
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if ((i <= 0) || !EVP_CIPHER_CTX_set_key_length(ctx, i)) {
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/* ERROR */
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goto err;
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}
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if (!EVP_DecryptInit_ex(ctx, NULL, NULL, key, iv))
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goto err;
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ret = 1;
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err:
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if (key != NULL)
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OPENSSL_cleanse(key, size);
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OPENSSL_free(key);
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return (ret);
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}
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int EVP_OpenFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
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{
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int i;
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i = EVP_DecryptFinal_ex(ctx, out, outl);
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if (i)
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i = EVP_DecryptInit_ex(ctx, NULL, NULL, NULL, NULL);
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return (i);
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}
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#else /* !OPENSSL_NO_RSA */
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# ifdef PEDANTIC
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static void *dummy = &dummy;
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# endif
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#endif
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