[thirdparty/openssl.git] / crypto / rsa / rsa_pmeth.c

/* crypto/rsa/rsa_pmeth.c */
/* Written by Dr Stephen N Henson (steve@openssl.org) 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 <openssl/bn.h>
#include <openssl/evp.h>
#include "evp_locl.h"
#include "rsa_locl.h"

/* RSA pkey context structure */

typedef struct
	{
	/* Key gen parameters */
	int nbits;
	BIGNUM *pub_exp;
	/* Keygen callback info */
	int gentmp[2];
	/* RSA padding mode */
	int pad_mode;
	/* message digest */
	const EVP_MD *md;
	/* message digest for MGF1 */
	const EVP_MD *mgf1md;
	/* PSS/OAEP salt length */
	int saltlen;
	/* Temp buffer */
	unsigned char *tbuf;
	} 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;
	rctx->md = NULL;
	rctx->mgf1md = NULL;
	rctx->tbuf = NULL;

	rctx->saltlen = -2;

	ctx->data = rctx;
	ctx->keygen_info = rctx->gentmp;
	ctx->keygen_info_count = 2;
	
	return 1;
	}

static int pkey_rsa_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
	{
	RSA_PKEY_CTX *dctx, *sctx;
	if (!pkey_rsa_init(dst))
		return 0;
       	sctx = src->data;
	dctx = dst->data;
	dctx->nbits = sctx->nbits;
	if (sctx->pub_exp)
		{
		dctx->pub_exp = BN_dup(sctx->pub_exp);
		if (!dctx->pub_exp)
			return 0;
		}
	dctx->pad_mode = sctx->pad_mode;
	dctx->md = sctx->md;
	return 1;
	}

static int setup_tbuf(RSA_PKEY_CTX *ctx, EVP_PKEY_CTX *pk)
	{
	if (ctx->tbuf)
		return 1;
	ctx->tbuf = OPENSSL_malloc(EVP_PKEY_size(pk->pkey));
	if (!ctx->tbuf)
		return 0;
	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);
		if (rctx->tbuf)
			OPENSSL_free(rctx->tbuf);
		OPENSSL_free(rctx);
		}
	}

static int pkey_rsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
					const unsigned char *tbs, size_t tbslen)
	{
	int ret;
	RSA_PKEY_CTX *rctx = ctx->data;
	RSA *rsa = ctx->pkey->pkey.rsa;

	if (rctx->md)
		{
		if (tbslen != (size_t)EVP_MD_size(rctx->md))
			{
			RSAerr(RSA_F_PKEY_RSA_SIGN,
					RSA_R_INVALID_DIGEST_LENGTH);
			return -1;
			}
		if (rctx->pad_mode == RSA_X931_PADDING)
			{
			if (!setup_tbuf(rctx, ctx))
				return -1;
			memcpy(rctx->tbuf, tbs, tbslen);
			rctx->tbuf[tbslen] =
				RSA_X931_hash_id(EVP_MD_type(rctx->md));
			ret = RSA_private_encrypt(tbslen + 1, rctx->tbuf,
						sig, rsa, RSA_X931_PADDING);
			}
		else if (rctx->pad_mode == RSA_PKCS1_PADDING)
			{
			unsigned int sltmp;
			ret = RSA_sign(EVP_MD_type(rctx->md),
						tbs, tbslen, sig, &sltmp, rsa);
			if (ret <= 0)
				return ret;
			ret = sltmp;
			}
		else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING)
			{
			const EVP_MD *pssmd;
			pssmd = rctx->mgf1md;
			if (pssmd == NULL)
				pssmd = rctx->md;
			if (!setup_tbuf(rctx, ctx))
				return -1;
			if (!RSA_padding_add_PKCS1_PSS(rsa, rctx->tbuf, tbs,
						pssmd, rctx->saltlen))
				return -1;
			ret = RSA_private_encrypt(RSA_size(rsa), rctx->tbuf,
						sig, rsa, RSA_NO_PADDING);
			}
		else
			return -1;
		}
	else
		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 *rout, size_t *routlen,
					const unsigned char *sig, size_t siglen)
	{
	int ret;
	RSA_PKEY_CTX *rctx = ctx->data;

	if (rctx->md)
		{
		if (rctx->pad_mode == RSA_X931_PADDING)
			{
			if (!setup_tbuf(rctx, ctx))
				return -1;
			ret = RSA_public_decrypt(siglen, sig,
						rctx->tbuf, ctx->pkey->pkey.rsa,
						RSA_X931_PADDING);
			if (ret < 1)
				return 0;
			ret--;
			if (rctx->tbuf[ret] !=
				RSA_X931_hash_id(EVP_MD_type(rctx->md)))
				{
				RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
						RSA_R_ALGORITHM_MISMATCH);
				return 0;
				}
			if (ret != EVP_MD_size(rctx->md))
				{
				RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
					RSA_R_INVALID_DIGEST_LENGTH);
				return 0;
				}
			if (rout)
				memcpy(rout, rctx->tbuf, ret);
			}
		else if (rctx->pad_mode == RSA_PKCS1_PADDING)
			{
			size_t sltmp;
			ret = int_rsa_verify(EVP_MD_type(rctx->md),
						NULL, 0, rout, &sltmp,
					sig, siglen, ctx->pkey->pkey.rsa);
			ret = sltmp;
			}
		else
			return -1;
		}
	else
		ret = RSA_public_decrypt(siglen, sig, rout, ctx->pkey->pkey.rsa,
							rctx->pad_mode);
	if (ret < 0)
		return ret;
	*routlen = ret;
	return 1;
	}

static int pkey_rsa_verify(EVP_PKEY_CTX *ctx,
					const unsigned char *sig, size_t siglen,
					const unsigned char *tbs, size_t tbslen)
	{
	RSA_PKEY_CTX *rctx = ctx->data;
	RSA *rsa = ctx->pkey->pkey.rsa;
	size_t rslen;
	if (rctx->md)
		{
		if (rctx->pad_mode == RSA_PKCS1_PADDING)
			return RSA_verify(EVP_MD_type(rctx->md), tbs, tbslen,
					sig, siglen, rsa);
		if (rctx->pad_mode == RSA_X931_PADDING)
			{
			if (pkey_rsa_verifyrecover(ctx, NULL, &rslen,
					sig, siglen) <= 0)
				return 0;
			}
		else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING)
			{
			int ret;
			const EVP_MD *pssmd;
			pssmd = rctx->mgf1md;
			if (pssmd == NULL)
				pssmd = rctx->md;
			if (!setup_tbuf(rctx, ctx))
				return -1;
			ret = RSA_public_decrypt(siglen, sig, rctx->tbuf,
							rsa, RSA_NO_PADDING);
			if (ret <= 0)
				return 0;
			ret = RSA_verify_PKCS1_PSS(rsa, tbs, pssmd,
						rctx->tbuf, rctx->saltlen);
			if (ret <= 0)
				return 0;
			return 1;
			}
		else
			return -1;
		}
	else
		{
		if (!setup_tbuf(rctx, ctx))
			return -1;
		rslen = RSA_public_decrypt(siglen, sig, rctx->tbuf,
						rsa, rctx->pad_mode);
		if (rslen == 0)
			return 0;
		}

	if ((rslen != tbslen) || memcmp(tbs, rctx->tbuf, rslen))
		return 0;

	return 1;
			
	}
	

static int pkey_rsa_encrypt(EVP_PKEY_CTX *ctx,
					unsigned char *out, size_t *outlen,
					const unsigned char *in, size_t 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, size_t *outlen,
					const unsigned char *in, size_t 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 check_padding_md(const EVP_MD *md, int padding)
	{
	if (!md)
		return 1;

	if (padding == RSA_NO_PADDING)
		{
		RSAerr(RSA_F_CHECK_PADDING_MD, RSA_R_INVALID_PADDING_MODE);
		return 0;
		}

	if (padding == RSA_X931_PADDING)
		{
		if (RSA_X931_hash_id(EVP_MD_type(md)) == -1)
			{
			RSAerr(RSA_F_CHECK_PADDING_MD,
						RSA_R_INVALID_X931_DIGEST);
			return 0;
			}
		return 1;
		}

	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:
		if ((p1 >= RSA_PKCS1_PADDING) && (p1 <= RSA_PKCS1_PSS_PADDING))
			{
			if (!check_padding_md(rctx->md, p1))
				return 0;
			if (p1 == RSA_PKCS1_PSS_PADDING) 
				{
				if (!(ctx->operation &
				     (EVP_PKEY_OP_SIGN | EVP_PKEY_OP_VERIFY)))
					goto bad_pad;
				if (!rctx->md)
					rctx->md = EVP_sha1();
				}
			if (p1 == RSA_PKCS1_OAEP_PADDING) 
				{
				if (!(ctx->operation & EVP_PKEY_OP_TYPE_CRYPT))
					goto bad_pad;
				if (!rctx->md)
					rctx->md = EVP_sha1();
				}
			rctx->pad_mode = p1;
			return 1;
			}
		bad_pad:
		RSAerr(RSA_F_PKEY_RSA_CTRL,
				RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
		return -2;

		case EVP_PKEY_CTRL_RSA_PSS_SALTLEN:
		if (p1 < -2)
			return -2;
		if (rctx->pad_mode != RSA_PKCS1_PSS_PADDING)
			{
			RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PSS_SALTLEN);
			return -2;
			}
		rctx->saltlen = p1;
		return 1;

		case EVP_PKEY_CTRL_RSA_KEYGEN_BITS:
		if (p1 < 256)
			{
			RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_KEYBITS);
			return -2;
			}
		rctx->nbits = p1;
		return 1;

		case EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP:
		if (!p2)
			return -2;
		rctx->pub_exp = p2;
		return 1;

		case EVP_PKEY_CTRL_MD:
		if (!check_padding_md(p2, rctx->pad_mode))
			return 0;
		rctx->md = p2;
		return 1;

		case EVP_PKEY_CTRL_RSA_MGF1_MD:
		rctx->mgf1md = p2;
		return 1;

		case EVP_PKEY_CTRL_DIGESTINIT:
		case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
		case EVP_PKEY_CTRL_PKCS7_DECRYPT:
		case EVP_PKEY_CTRL_PKCS7_SIGN:
#ifndef OPENSSL_NO_CMS
		case EVP_PKEY_CTRL_CMS_ENCRYPT:
		case EVP_PKEY_CTRL_CMS_DECRYPT:
		case EVP_PKEY_CTRL_CMS_SIGN:
#endif
		return 1;
		case EVP_PKEY_CTRL_PEER_KEY:
			RSAerr(RSA_F_PKEY_RSA_CTRL,
			RSA_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
			return -2;	

		default:
		return -2;

		}
	}
			
static int pkey_rsa_ctrl_str(EVP_PKEY_CTX *ctx,
			const char *type, const char *value)
	{
	if (!value)
		{
		RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_VALUE_MISSING);
		return 0;
		}
	if (!strcmp(type, "rsa_padding_mode"))
		{
		int pm;
		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 if (!strcmp(value, "pss"))
			pm = RSA_PKCS1_PSS_PADDING;
		else
			{
			RSAerr(RSA_F_PKEY_RSA_CTRL_STR,
						RSA_R_UNKNOWN_PADDING_TYPE);
			return -2;
			}
		return EVP_PKEY_CTX_set_rsa_padding(ctx, pm);
		}

	if (!strcmp(type, "rsa_pss_saltlen"))
		{
		int saltlen;
		saltlen = atoi(value);
		return EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx, saltlen);
		}

	if (!strcmp(type, "rsa_keygen_bits"))
		{
		int nbits;
		nbits = atoi(value);
		return EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, nbits);
		}

	if (!strcmp(type, "rsa_keygen_pubexp"))
		{
		int ret;
		BIGNUM *pubexp = NULL;
		if (!BN_asc2bn(&pubexp, value))
			return 0;
		ret = EVP_PKEY_CTX_set_rsa_keygen_pubexp(ctx, pubexp);
		if (ret <= 0)
			BN_free(pubexp);
		return ret;
		}

	return -2;
	}

static int pkey_rsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
	{
	RSA *rsa = NULL;
	RSA_PKEY_CTX *rctx = ctx->data;
	BN_GENCB *pcb, cb;
	int ret;
	if (!rctx->pub_exp)
		{
		rctx->pub_exp = BN_new();
		if (!rctx->pub_exp || !BN_set_word(rctx->pub_exp, RSA_F4))
			return 0;
		}
	rsa = RSA_new();
	if (!rsa)
		return 0;
	if (ctx->pkey_gencb)
		{
		pcb = &cb;
		evp_pkey_set_cb_translate(pcb, ctx);
		}
	else
		pcb = NULL;
	ret = RSA_generate_key_ex(rsa, rctx->nbits, rctx->pub_exp, pcb);
	if (ret > 0)
		EVP_PKEY_assign_RSA(pkey, rsa);
	else
		RSA_free(rsa);
	return ret;
	}

const EVP_PKEY_METHOD rsa_pkey_meth = 
	{
	EVP_PKEY_RSA,
	EVP_PKEY_FLAG_AUTOARGLEN,
	pkey_rsa_init,
	pkey_rsa_copy,
	pkey_rsa_cleanup,

	0,0,

	0,
	pkey_rsa_keygen,

	0,
	pkey_rsa_sign,

	0,
	pkey_rsa_verify,

	0,
	pkey_rsa_verifyrecover,


	0,0,0,0,

	0,
	pkey_rsa_encrypt,

	0,
	pkey_rsa_decrypt,

	0,0,

	pkey_rsa_ctrl,
	pkey_rsa_ctrl_str


	};
Commit	Line	Data
09b88a4a	1	/* crypto/rsa/rsa_pmeth.c */
2e597528	2	/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
0b6f3c66 DSH	3	* project 2006.
	4	*/
	5	/* ====================================================================
	6	* Copyright (c) 2006 The OpenSSL Project. All rights reserved.
	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	*
	12	* 1. Redistributions of source code must retain the above copyright
	13	* notice, this list of conditions and the following disclaimer.
	14	*
	15	* 2. Redistributions in binary form must reproduce the above copyright
	16	* notice, this list of conditions and the following disclaimer in
	17	* the documentation and/or other materials provided with the
	18	* distribution.
	19	*
	20	* 3. All advertising materials mentioning features or use of this
	21	* software must display the following acknowledgment:
	22	* "This product includes software developed by the OpenSSL Project
	23	* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
	24	*
	25	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
	26	* endorse or promote products derived from this software without
	27	* prior written permission. For written permission, please contact
	28	* licensing@OpenSSL.org.
	29	*
	30	* 5. Products derived from this software may not be called "OpenSSL"
	31	* nor may "OpenSSL" appear in their names without prior written
	32	* permission of the OpenSSL Project.
	33	*
	34	* 6. Redistributions of any form whatsoever must retain the following
	35	* acknowledgment:
	36	* "This product includes software developed by the OpenSSL Project
	37	* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
	38	*
	39	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
	40	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	41	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	42	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
	43	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	44	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	45	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	46	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	47	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	48	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	49	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	50	* OF THE POSSIBILITY OF SUCH DAMAGE.
	51	* ====================================================================
	52	*
	53	* This product includes cryptographic software written by Eric Young
	54	* (eay@cryptsoft.com). This product includes software written by Tim
	55	* Hudson (tjh@cryptsoft.com).
	56	*
	57	*/
	58
	59	#include <stdio.h>
	60	#include "cryptlib.h"
	61	#include <openssl/asn1t.h>
	62	#include <openssl/x509.h>
	63	#include <openssl/rsa.h>
1e26a8ba	64	#include <openssl/bn.h>
b2a97be7	65	#include <openssl/evp.h>
0b6f3c66	66	#include "evp_locl.h"
777c47ac	67	#include "rsa_locl.h"
b2a97be7	68
07e970c7 DSH	69	/* RSA pkey context structure */
	70
	71	typedef struct
	72	{
	73	/* Key gen parameters */
	74	int nbits;
	75	BIGNUM *pub_exp;
f5cda4cb DSH	76	/* Keygen callback info */
f5cda4cb DSH	77	int gentmp[2];
07e970c7 DSH	78	/* RSA padding mode */
07e970c7 DSH	79	int pad_mode;
4f59b658	80	/* message digest */
75d44c04	81	const EVP_MD *md;
77f4b6ba DSH	82	/* message digest for MGF1 */
77f4b6ba DSH	83	const EVP_MD *mgf1md;
a7ffd9d1 DSH	84	/* PSS/OAEP salt length */
a7ffd9d1 DSH	85	int saltlen;
b2a97be7 DSH	86	/* Temp buffer */
b2a97be7 DSH	87	unsigned char *tbuf;
07e970c7 DSH	88	} RSA_PKEY_CTX;
	89
	90	static int pkey_rsa_init(EVP_PKEY_CTX *ctx)
	91	{
	92	RSA_PKEY_CTX *rctx;
	93	rctx = OPENSSL_malloc(sizeof(RSA_PKEY_CTX));
	94	if (!rctx)
	95	return 0;
	96	rctx->nbits = 1024;
	97	rctx->pub_exp = NULL;
	98	rctx->pad_mode = RSA_PKCS1_PADDING;
75d44c04	99	rctx->md = NULL;
77f4b6ba	100	rctx->mgf1md = NULL;
b2a97be7 DSH	101	rctx->tbuf = NULL;
b2a97be7 DSH	102
a7ffd9d1	103	rctx->saltlen = -2;
29db322e	104
07e970c7	105	ctx->data = rctx;
f5cda4cb DSH	106	ctx->keygen_info = rctx->gentmp;
f5cda4cb DSH	107	ctx->keygen_info_count = 2;
b2a97be7 DSH	108
	109	return 1;
	110	}
	111
8bdcef40 DSH	112	static int pkey_rsa_copy(EVP_PKEY_CTX dst, EVP_PKEY_CTX src)
	113	{
	114	RSA_PKEY_CTX dctx, sctx;
	115	if (!pkey_rsa_init(dst))
	116	return 0;
	117	sctx = src->data;
	118	dctx = dst->data;
	119	dctx->nbits = sctx->nbits;
	120	if (sctx->pub_exp)
	121	{
	122	dctx->pub_exp = BN_dup(sctx->pub_exp);
	123	if (!dctx->pub_exp)
	124	return 0;
	125	}
	126	dctx->pad_mode = sctx->pad_mode;
	127	dctx->md = sctx->md;
	128	return 1;
	129	}
	130
b2a97be7 DSH	131	static int setup_tbuf(RSA_PKEY_CTX ctx, EVP_PKEY_CTX pk)
	132	{
	133	if (ctx->tbuf)
	134	return 1;
	135	ctx->tbuf = OPENSSL_malloc(EVP_PKEY_size(pk->pkey));
	136	if (!ctx->tbuf)
	137	return 0;
07e970c7 DSH	138	return 1;
	139	}
	140
	141	static void pkey_rsa_cleanup(EVP_PKEY_CTX *ctx)
	142	{
	143	RSA_PKEY_CTX *rctx = ctx->data;
	144	if (rctx)
	145	{
	146	if (rctx->pub_exp)
	147	BN_free(rctx->pub_exp);
9fdab72d DSH	148	if (rctx->tbuf)
9fdab72d DSH	149	OPENSSL_free(rctx->tbuf);
c927df3f	150	OPENSSL_free(rctx);
07e970c7	151	}
07e970c7 DSH	152	}
07e970c7 DSH	153
eaff5a14 DSH	154	static int pkey_rsa_sign(EVP_PKEY_CTX ctx, unsigned char sig, size_t *siglen,
eaff5a14 DSH	155	const unsigned char *tbs, size_t tbslen)
07e970c7 DSH	156	{
	157	int ret;
	158	RSA_PKEY_CTX *rctx = ctx->data;
a7ffd9d1	159	RSA *rsa = ctx->pkey->pkey.rsa;
b2a97be7	160
75d44c04	161	if (rctx->md)
b2a97be7	162	{
eaff5a14	163	if (tbslen != (size_t)EVP_MD_size(rctx->md))
75d44c04 DSH	164	{
	165	RSAerr(RSA_F_PKEY_RSA_SIGN,
	166	RSA_R_INVALID_DIGEST_LENGTH);
	167	return -1;
	168	}
b2a97be7 DSH	169	if (rctx->pad_mode == RSA_X931_PADDING)
	170	{
	171	if (!setup_tbuf(rctx, ctx))
	172	return -1;
	173	memcpy(rctx->tbuf, tbs, tbslen);
75d44c04 DSH	174	rctx->tbuf[tbslen] =
75d44c04 DSH	175	RSA_X931_hash_id(EVP_MD_type(rctx->md));
b2a97be7	176	ret = RSA_private_encrypt(tbslen + 1, rctx->tbuf,
a7ffd9d1	177	sig, rsa, RSA_X931_PADDING);
b2a97be7 DSH	178	}
	179	else if (rctx->pad_mode == RSA_PKCS1_PADDING)
	180	{
	181	unsigned int sltmp;
75d44c04	182	ret = RSA_sign(EVP_MD_type(rctx->md),
a7ffd9d1	183	tbs, tbslen, sig, &sltmp, rsa);
4f59b658 DSH	184	if (ret <= 0)
	185	return ret;
	186	ret = sltmp;
b2a97be7	187	}
a7ffd9d1 DSH	188	else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING)
a7ffd9d1 DSH	189	{
77f4b6ba DSH	190	const EVP_MD *pssmd;
	191	pssmd = rctx->mgf1md;
	192	if (pssmd == NULL)
	193	pssmd = rctx->md;
a7ffd9d1 DSH	194	if (!setup_tbuf(rctx, ctx))
	195	return -1;
	196	if (!RSA_padding_add_PKCS1_PSS(rsa, rctx->tbuf, tbs,
77f4b6ba	197	pssmd, rctx->saltlen))
a7ffd9d1 DSH	198	return -1;
	199	ret = RSA_private_encrypt(RSA_size(rsa), rctx->tbuf,
	200	sig, rsa, RSA_NO_PADDING);
	201	}
b2a97be7 DSH	202	else
	203	return -1;
	204	}
	205	else
	206	ret = RSA_private_encrypt(tbslen, tbs, sig, ctx->pkey->pkey.rsa,
07e970c7 DSH	207	rctx->pad_mode);
	208	if (ret < 0)
	209	return ret;
	210	*siglen = ret;
	211	return 1;
	212	}
	213
	214
	215	static int pkey_rsa_verifyrecover(EVP_PKEY_CTX *ctx,
eaff5a14 DSH	216	unsigned char rout, size_t routlen,
eaff5a14 DSH	217	const unsigned char *sig, size_t siglen)
07e970c7 DSH	218	{
	219	int ret;
	220	RSA_PKEY_CTX *rctx = ctx->data;
b2a97be7	221
75d44c04	222	if (rctx->md)
b2a97be7 DSH	223	{
	224	if (rctx->pad_mode == RSA_X931_PADDING)
	225	{
	226	if (!setup_tbuf(rctx, ctx))
	227	return -1;
4f59b658	228	ret = RSA_public_decrypt(siglen, sig,
b2a97be7 DSH	229	rctx->tbuf, ctx->pkey->pkey.rsa,
	230	RSA_X931_PADDING);
	231	if (ret < 1)
	232	return 0;
9fdab72d	233	ret--;
75d44c04 DSH	234	if (rctx->tbuf[ret] !=
75d44c04 DSH	235	RSA_X931_hash_id(EVP_MD_type(rctx->md)))
b2a97be7 DSH	236	{
	237	RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
	238	RSA_R_ALGORITHM_MISMATCH);
	239	return 0;
	240	}
75d44c04 DSH	241	if (ret != EVP_MD_size(rctx->md))
	242	{
	243	RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
	244	RSA_R_INVALID_DIGEST_LENGTH);
	245	return 0;
	246	}
4f59b658 DSH	247	if (rout)
4f59b658 DSH	248	memcpy(rout, rctx->tbuf, ret);
b2a97be7 DSH	249	}
	250	else if (rctx->pad_mode == RSA_PKCS1_PADDING)
	251	{
786aa98d	252	size_t sltmp;
75d44c04	253	ret = int_rsa_verify(EVP_MD_type(rctx->md),
4f59b658 DSH	254	NULL, 0, rout, &sltmp,
4f59b658 DSH	255	sig, siglen, ctx->pkey->pkey.rsa);
716630c0	256	ret = sltmp;
b2a97be7 DSH	257	}
	258	else
	259	return -1;
	260	}
	261	else
4f59b658	262	ret = RSA_public_decrypt(siglen, sig, rout, ctx->pkey->pkey.rsa,
07e970c7 DSH	263	rctx->pad_mode);
	264	if (ret < 0)
	265	return ret;
4f59b658	266	*routlen = ret;
07e970c7 DSH	267	return 1;
	268	}
	269
4f59b658	270	static int pkey_rsa_verify(EVP_PKEY_CTX *ctx,
eaff5a14 DSH	271	const unsigned char *sig, size_t siglen,
eaff5a14 DSH	272	const unsigned char *tbs, size_t tbslen)
4f59b658 DSH	273	{
4f59b658 DSH	274	RSA_PKEY_CTX *rctx = ctx->data;
a7ffd9d1	275	RSA *rsa = ctx->pkey->pkey.rsa;
eaff5a14	276	size_t rslen;
4f59b658 DSH	277	if (rctx->md)
	278	{
	279	if (rctx->pad_mode == RSA_PKCS1_PADDING)
	280	return RSA_verify(EVP_MD_type(rctx->md), tbs, tbslen,
a7ffd9d1	281	sig, siglen, rsa);
4f59b658 DSH	282	if (rctx->pad_mode == RSA_X931_PADDING)
	283	{
	284	if (pkey_rsa_verifyrecover(ctx, NULL, &rslen,
	285	sig, siglen) <= 0)
	286	return 0;
	287	}
a7ffd9d1 DSH	288	else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING)
	289	{
	290	int ret;
77f4b6ba DSH	291	const EVP_MD *pssmd;
	292	pssmd = rctx->mgf1md;
	293	if (pssmd == NULL)
	294	pssmd = rctx->md;
a7ffd9d1 DSH	295	if (!setup_tbuf(rctx, ctx))
	296	return -1;
	297	ret = RSA_public_decrypt(siglen, sig, rctx->tbuf,
	298	rsa, RSA_NO_PADDING);
	299	if (ret <= 0)
	300	return 0;
77f4b6ba	301	ret = RSA_verify_PKCS1_PSS(rsa, tbs, pssmd,
a7ffd9d1 DSH	302	rctx->tbuf, rctx->saltlen);
	303	if (ret <= 0)
	304	return 0;
	305	return 1;
	306	}
4f59b658 DSH	307	else
	308	return -1;
	309	}
	310	else
	311	{
	312	if (!setup_tbuf(rctx, ctx))
	313	return -1;
	314	rslen = RSA_public_decrypt(siglen, sig, rctx->tbuf,
a7ffd9d1	315	rsa, rctx->pad_mode);
0cfc80c4	316	if (rslen == 0)
4f59b658 DSH	317	return 0;
	318	}
	319
	320	if ((rslen != tbslen) \|\| memcmp(tbs, rctx->tbuf, rslen))
	321	return 0;
	322
	323	return 1;
	324
	325	}
	326
	327
eaff5a14 DSH	328	static int pkey_rsa_encrypt(EVP_PKEY_CTX *ctx,
	329	unsigned char out, size_t outlen,
	330	const unsigned char *in, size_t inlen)
8cd44e36 DSH	331	{
	332	int ret;
	333	RSA_PKEY_CTX *rctx = ctx->data;
	334	ret = RSA_public_encrypt(inlen, in, out, ctx->pkey->pkey.rsa,
	335	rctx->pad_mode);
	336	if (ret < 0)
	337	return ret;
	338	*outlen = ret;
	339	return 1;
	340	}
	341
eaff5a14 DSH	342	static int pkey_rsa_decrypt(EVP_PKEY_CTX *ctx,
	343	unsigned char out, size_t outlen,
	344	const unsigned char *in, size_t inlen)
8cd44e36 DSH	345	{
	346	int ret;
	347	RSA_PKEY_CTX *rctx = ctx->data;
	348	ret = RSA_private_decrypt(inlen, in, out, ctx->pkey->pkey.rsa,
	349	rctx->pad_mode);
	350	if (ret < 0)
	351	return ret;
	352	*outlen = ret;
	353	return 1;
	354	}
07e970c7	355
75d44c04	356	static int check_padding_md(const EVP_MD *md, int padding)
b2a97be7	357	{
75d44c04	358	if (!md)
b2a97be7	359	return 1;
a7ffd9d1	360
b2a97be7 DSH	361	if (padding == RSA_NO_PADDING)
b2a97be7 DSH	362	{
c927df3f	363	RSAerr(RSA_F_CHECK_PADDING_MD, RSA_R_INVALID_PADDING_MODE);
b2a97be7 DSH	364	return 0;
	365	}
	366
	367	if (padding == RSA_X931_PADDING)
	368	{
75d44c04	369	if (RSA_X931_hash_id(EVP_MD_type(md)) == -1)
b2a97be7	370	{
c927df3f	371	RSAerr(RSA_F_CHECK_PADDING_MD,
b2a97be7 DSH	372	RSA_R_INVALID_X931_DIGEST);
	373	return 0;
	374	}
	375	return 1;
	376	}
	377
	378	return 1;
	379	}
	380
	381
4a3dc3c0 DSH	382	static int pkey_rsa_ctrl(EVP_PKEY_CTX ctx, int type, int p1, void p2)
	383	{
	384	RSA_PKEY_CTX *rctx = ctx->data;
	385	switch (type)
	386	{
4a3dc3c0	387	case EVP_PKEY_CTRL_RSA_PADDING:
29db322e	388	if ((p1 >= RSA_PKCS1_PADDING) && (p1 <= RSA_PKCS1_PSS_PADDING))
4a3dc3c0	389	{
75d44c04	390	if (!check_padding_md(rctx->md, p1))
b2a97be7	391	return 0;
a7ffd9d1 DSH	392	if (p1 == RSA_PKCS1_PSS_PADDING)
a7ffd9d1 DSH	393	{
7f57b076 DSH	394	if (!(ctx->operation &
	395	(EVP_PKEY_OP_SIGN \| EVP_PKEY_OP_VERIFY)))
	396	goto bad_pad;
a7ffd9d1 DSH	397	if (!rctx->md)
	398	rctx->md = EVP_sha1();
	399	}
	400	if (p1 == RSA_PKCS1_OAEP_PADDING)
	401	{
	402	if (!(ctx->operation & EVP_PKEY_OP_TYPE_CRYPT))
7f57b076	403	goto bad_pad;
a7ffd9d1 DSH	404	if (!rctx->md)
	405	rctx->md = EVP_sha1();
	406	}
4a3dc3c0 DSH	407	rctx->pad_mode = p1;
	408	return 1;
	409	}
7f57b076 DSH	410	bad_pad:
	411	RSAerr(RSA_F_PKEY_RSA_CTRL,
	412	RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
6471c9f4	413	return -2;
4a3dc3c0	414
f9a6348a DSH	415	case EVP_PKEY_CTRL_RSA_PSS_SALTLEN:
	416	if (p1 < -2)
	417	return -2;
	418	if (rctx->pad_mode != RSA_PKCS1_PSS_PADDING)
7f57b076 DSH	419	{
7f57b076 DSH	420	RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PSS_SALTLEN);
f9a6348a	421	return -2;
7f57b076	422	}
f9a6348a DSH	423	rctx->saltlen = p1;
	424	return 1;
	425
54d853eb DSH	426	case EVP_PKEY_CTRL_RSA_KEYGEN_BITS:
54d853eb DSH	427	if (p1 < 256)
7f57b076 DSH	428	{
7f57b076 DSH	429	RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_KEYBITS);
54d853eb	430	return -2;
7f57b076	431	}
54d853eb DSH	432	rctx->nbits = p1;
	433	return 1;
	434
	435	case EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP:
	436	if (!p2)
	437	return -2;
	438	rctx->pub_exp = p2;
	439	return 1;
	440
75d44c04 DSH	441	case EVP_PKEY_CTRL_MD:
75d44c04 DSH	442	if (!check_padding_md(p2, rctx->pad_mode))
b2a97be7	443	return 0;
75d44c04	444	rctx->md = p2;
b2a97be7 DSH	445	return 1;
b2a97be7 DSH	446
31904ecd	447	case EVP_PKEY_CTRL_RSA_MGF1_MD:
77f4b6ba DSH	448	rctx->mgf1md = p2;
	449	return 1;
	450
156ee882	451	case EVP_PKEY_CTRL_DIGESTINIT:
399a6f0b DSH	452	case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
399a6f0b DSH	453	case EVP_PKEY_CTRL_PKCS7_DECRYPT:
b7683e3a	454	case EVP_PKEY_CTRL_PKCS7_SIGN:
8931b30d DSH	455	#ifndef OPENSSL_NO_CMS
	456	case EVP_PKEY_CTRL_CMS_ENCRYPT:
	457	case EVP_PKEY_CTRL_CMS_DECRYPT:
	458	case EVP_PKEY_CTRL_CMS_SIGN:
	459	#endif
399a6f0b	460	return 1;
0e1dba93 DSH	461	case EVP_PKEY_CTRL_PEER_KEY:
0e1dba93 DSH	462	RSAerr(RSA_F_PKEY_RSA_CTRL,
4f1aa191	463	RSA_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
0e1dba93	464	return -2;
399a6f0b	465
4a3dc3c0 DSH	466	default:
	467	return -2;
	468
	469	}
	470	}
	471
	472	static int pkey_rsa_ctrl_str(EVP_PKEY_CTX *ctx,
	473	const char type, const char value)
	474	{
7f57b076 DSH	475	if (!value)
	476	{
	477	RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_VALUE_MISSING);
	478	return 0;
	479	}
4a3dc3c0 DSH	480	if (!strcmp(type, "rsa_padding_mode"))
	481	{
	482	int pm;
4a3dc3c0 DSH	483	if (!strcmp(value, "pkcs1"))
	484	pm = RSA_PKCS1_PADDING;
	485	else if (!strcmp(value, "sslv23"))
	486	pm = RSA_SSLV23_PADDING;
	487	else if (!strcmp(value, "none"))
	488	pm = RSA_NO_PADDING;
	489	else if (!strcmp(value, "oeap"))
	490	pm = RSA_PKCS1_OAEP_PADDING;
	491	else if (!strcmp(value, "x931"))
	492	pm = RSA_X931_PADDING;
29db322e DSH	493	else if (!strcmp(value, "pss"))
29db322e DSH	494	pm = RSA_PKCS1_PSS_PADDING;
4a3dc3c0	495	else
7f57b076 DSH	496	{
	497	RSAerr(RSA_F_PKEY_RSA_CTRL_STR,
	498	RSA_R_UNKNOWN_PADDING_TYPE);
4a3dc3c0	499	return -2;
7f57b076	500	}
6471c9f4	501	return EVP_PKEY_CTX_set_rsa_padding(ctx, pm);
4a3dc3c0	502	}
54d853eb	503
f9a6348a DSH	504	if (!strcmp(type, "rsa_pss_saltlen"))
	505	{
	506	int saltlen;
	507	saltlen = atoi(value);
	508	return EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx, saltlen);
	509	}
54d853eb DSH	510
	511	if (!strcmp(type, "rsa_keygen_bits"))
	512	{
	513	int nbits;
	514	nbits = atoi(value);
	515	return EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, nbits);
	516	}
	517
	518	if (!strcmp(type, "rsa_keygen_pubexp"))
	519	{
	520	int ret;
	521	BIGNUM *pubexp = NULL;
	522	if (!BN_asc2bn(&pubexp, value))
	523	return 0;
	524	ret = EVP_PKEY_CTX_set_rsa_keygen_pubexp(ctx, pubexp);
	525	if (ret <= 0)
	526	BN_free(pubexp);
	527	return ret;
	528	}
	529
4a3dc3c0 DSH	530	return -2;
	531	}
	532
f5cda4cb DSH	533	static int pkey_rsa_keygen(EVP_PKEY_CTX ctx, EVP_PKEY pkey)
	534	{
	535	RSA *rsa = NULL;
	536	RSA_PKEY_CTX *rctx = ctx->data;
	537	BN_GENCB *pcb, cb;
	538	int ret;
	539	if (!rctx->pub_exp)
	540	{
	541	rctx->pub_exp = BN_new();
	542	if (!rctx->pub_exp \|\| !BN_set_word(rctx->pub_exp, RSA_F4))
	543	return 0;
	544	}
	545	rsa = RSA_new();
	546	if (!rsa)
	547	return 0;
	548	if (ctx->pkey_gencb)
	549	{
	550	pcb = &cb;
	551	evp_pkey_set_cb_translate(pcb, ctx);
	552	}
	553	else
	554	pcb = NULL;
	555	ret = RSA_generate_key_ex(rsa, rctx->nbits, rctx->pub_exp, pcb);
	556	if (ret > 0)
	557	EVP_PKEY_assign_RSA(pkey, rsa);
	558	else
	559	RSA_free(rsa);
	560	return ret;
	561	}
	562
0b6f3c66 DSH	563	const EVP_PKEY_METHOD rsa_pkey_meth =
	564	{
	565	EVP_PKEY_RSA,
b010b7c4	566	EVP_PKEY_FLAG_AUTOARGLEN,
07e970c7	567	pkey_rsa_init,
8bdcef40	568	pkey_rsa_copy,
07e970c7 DSH	569	pkey_rsa_cleanup,
	570
	571	0,0,
	572
f5cda4cb DSH	573	0,
f5cda4cb DSH	574	pkey_rsa_keygen,
07e970c7 DSH	575
	576	0,
	577	pkey_rsa_sign,
	578
4f59b658 DSH	579	0,
4f59b658 DSH	580	pkey_rsa_verify,
07e970c7 DSH	581
07e970c7 DSH	582	0,
8cd44e36 DSH	583	pkey_rsa_verifyrecover,
	584
	585
	586	0,0,0,0,
	587
	588	0,
	589	pkey_rsa_encrypt,
	590
	591	0,
	592	pkey_rsa_decrypt,
	593
d87e6152 DSH	594	0,0,
d87e6152 DSH	595
4a3dc3c0 DSH	596	pkey_rsa_ctrl,
4a3dc3c0 DSH	597	pkey_rsa_ctrl_str
8cd44e36	598
07e970c7	599
0b6f3c66	600	};