openssl/crypto/rsa/rsa_pmeth.c

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/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
* project 2006.
*/
/* ====================================================================
* Copyright (c) 2006 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#include <stdio.h>
#include "cryptlib.h"
#include <openssl/asn1t.h>
#include <openssl/x509.h>
#include <openssl/rsa.h>
#include "evp_locl.h"
/* RSA pkey context structure */
typedef struct
{
/* Key gen parameters */
int nbits;
BIGNUM *pub_exp;
/* RSA padding mode */
int pad_mode;
} RSA_PKEY_CTX;
static int pkey_rsa_init(EVP_PKEY_CTX *ctx)
{
RSA_PKEY_CTX *rctx;
rctx = OPENSSL_malloc(sizeof(RSA_PKEY_CTX));
if (!rctx)
return 0;
rctx->nbits = 1024;
rctx->pub_exp = NULL;
rctx->pad_mode = RSA_PKCS1_PADDING;
ctx->data = rctx;
return 1;
}
static void pkey_rsa_cleanup(EVP_PKEY_CTX *ctx)
{
RSA_PKEY_CTX *rctx = ctx->data;
if (rctx)
{
if (rctx->pub_exp)
BN_free(rctx->pub_exp);
}
OPENSSL_free(rctx);
}
static int pkey_rsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, int *siglen,
unsigned char *tbs, int tbslen)
{
int ret;
RSA_PKEY_CTX *rctx = ctx->data;
ret = RSA_private_encrypt(tbslen, tbs, sig, ctx->pkey->pkey.rsa,
rctx->pad_mode);
if (ret < 0)
return ret;
*siglen = ret;
return 1;
}
static int pkey_rsa_verifyrecover(EVP_PKEY_CTX *ctx,
unsigned char *sig, int *siglen,
unsigned char *tbs, int tbslen)
{
int ret;
RSA_PKEY_CTX *rctx = ctx->data;
ret = RSA_public_decrypt(tbslen, tbs, sig, ctx->pkey->pkey.rsa,
rctx->pad_mode);
if (ret < 0)
return ret;
*siglen = ret;
return 1;
}
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static int pkey_rsa_encrypt(EVP_PKEY_CTX *ctx, unsigned char *out, int *outlen,
unsigned char *in, int inlen)
{
int ret;
RSA_PKEY_CTX *rctx = ctx->data;
ret = RSA_public_encrypt(inlen, in, out, ctx->pkey->pkey.rsa,
rctx->pad_mode);
if (ret < 0)
return ret;
*outlen = ret;
return 1;
}
static int pkey_rsa_decrypt(EVP_PKEY_CTX *ctx, unsigned char *out, int *outlen,
unsigned char *in, int inlen)
{
int ret;
RSA_PKEY_CTX *rctx = ctx->data;
ret = RSA_private_decrypt(inlen, in, out, ctx->pkey->pkey.rsa,
rctx->pad_mode);
if (ret < 0)
return ret;
*outlen = ret;
return 1;
}
static int pkey_rsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
{
RSA_PKEY_CTX *rctx = ctx->data;
switch (type)
{
case EVP_PKEY_CTRL_RSA_PADDING:
/* TODO: add PSS support */
if ((p1 >= RSA_PKCS1_PADDING) && (p1 <= RSA_X931_PADDING))
{
rctx->pad_mode = p1;
return 1;
}
return 0;
default:
return -2;
}
}
static int pkey_rsa_ctrl_str(EVP_PKEY_CTX *ctx,
const char *type, const char *value)
{
if (!strcmp(type, "rsa_padding_mode"))
{
int pm;
if (!value)
return 0;
if (!strcmp(value, "pkcs1"))
pm = RSA_PKCS1_PADDING;
else if (!strcmp(value, "sslv23"))
pm = RSA_SSLV23_PADDING;
else if (!strcmp(value, "none"))
pm = RSA_NO_PADDING;
else if (!strcmp(value, "oeap"))
pm = RSA_PKCS1_OAEP_PADDING;
else if (!strcmp(value, "x931"))
pm = RSA_X931_PADDING;
else
return -2;
return pkey_rsa_ctrl(ctx, EVP_PKEY_CTRL_RSA_PADDING, pm, NULL);
}
return -2;
}
const EVP_PKEY_METHOD rsa_pkey_meth =
{
EVP_PKEY_RSA,
0,
pkey_rsa_init,
pkey_rsa_cleanup,
0,0,
0,0,
0,
pkey_rsa_sign,
0,0,
0,
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pkey_rsa_verifyrecover,
0,0,0,0,
0,
pkey_rsa_encrypt,
0,
pkey_rsa_decrypt,
pkey_rsa_ctrl,
pkey_rsa_ctrl_str
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};