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

/* crypto/rsa/rsa_pmeth.c */
/* 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 <openssl/evp.h>
#include "evp_locl.h"

extern int int_rsa_verify(int dtype, const unsigned char *m, unsigned int m_len,
		unsigned char *rm, unsigned int *prm_len,
		const unsigned char *sigbuf, unsigned int siglen,
		RSA *rsa);

/* 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;
	/* 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->tbuf = NULL;

	rctx->saltlen = -2;

	ctx->data = rctx;
	ctx->keygen_info = rctx->gentmp;
	ctx->keygen_info_count = 2;
	
	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, int *siglen,
					const unsigned char *tbs, int tbslen)
	{
	int ret;
	RSA_PKEY_CTX *rctx = ctx->data;
	RSA *rsa = ctx->pkey->pkey.rsa;

	if (rctx->md)
		{
		if (tbslen != 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)
			{
			if (!setup_tbuf(rctx, ctx))
				return -1;
			if (!RSA_padding_add_PKCS1_PSS(rsa, rctx->tbuf, tbs,
						rctx->md, 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, int *routlen,
                                        const unsigned char *sig, int 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)
			{
			unsigned int 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, int siglen,
                                        const unsigned char *tbs, int tbslen)
	{
	RSA_PKEY_CTX *rctx = ctx->data;
	RSA *rsa = ctx->pkey->pkey.rsa;
	int 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;
			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, rctx->md,
						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, int *outlen,
                                        const 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,
                                        const 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 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_PKCS7_ENCRYPT:
		case EVP_PKEY_CTRL_PKCS7_DECRYPT:
		return 1;

		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_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 */
0b6f3c66 DSH	2	/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
	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>
b2a97be7	64	#include <openssl/evp.h>
0b6f3c66 DSH	65	#include "evp_locl.h"
0b6f3c66 DSH	66
b2a97be7 DSH	67	extern int int_rsa_verify(int dtype, const unsigned char *m, unsigned int m_len,
b2a97be7 DSH	68	unsigned char rm, unsigned int prm_len,
a58a6368	69	const unsigned char *sigbuf, unsigned int siglen,
b2a97be7 DSH	70	RSA *rsa);
b2a97be7 DSH	71
07e970c7 DSH	72	/* RSA pkey context structure */
	73
	74	typedef struct
	75	{
	76	/* Key gen parameters */
	77	int nbits;
	78	BIGNUM *pub_exp;
f5cda4cb DSH	79	/* Keygen callback info */
f5cda4cb DSH	80	int gentmp[2];
07e970c7 DSH	81	/* RSA padding mode */
07e970c7 DSH	82	int pad_mode;
4f59b658	83	/* message digest */
75d44c04	84	const EVP_MD *md;
a7ffd9d1 DSH	85	/* PSS/OAEP salt length */
a7ffd9d1 DSH	86	int saltlen;
b2a97be7 DSH	87	/* Temp buffer */
b2a97be7 DSH	88	unsigned char *tbuf;
07e970c7 DSH	89	} RSA_PKEY_CTX;
	90
	91	static int pkey_rsa_init(EVP_PKEY_CTX *ctx)
	92	{
	93	RSA_PKEY_CTX *rctx;
	94	rctx = OPENSSL_malloc(sizeof(RSA_PKEY_CTX));
	95	if (!rctx)
	96	return 0;
	97	rctx->nbits = 1024;
	98	rctx->pub_exp = NULL;
	99	rctx->pad_mode = RSA_PKCS1_PADDING;
75d44c04	100	rctx->md = 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
	112	static int setup_tbuf(RSA_PKEY_CTX ctx, EVP_PKEY_CTX pk)
	113	{
	114	if (ctx->tbuf)
	115	return 1;
	116	ctx->tbuf = OPENSSL_malloc(EVP_PKEY_size(pk->pkey));
	117	if (!ctx->tbuf)
	118	return 0;
07e970c7 DSH	119	return 1;
	120	}
	121
	122	static void pkey_rsa_cleanup(EVP_PKEY_CTX *ctx)
	123	{
	124	RSA_PKEY_CTX *rctx = ctx->data;
	125	if (rctx)
	126	{
	127	if (rctx->pub_exp)
	128	BN_free(rctx->pub_exp);
9fdab72d DSH	129	if (rctx->tbuf)
9fdab72d DSH	130	OPENSSL_free(rctx->tbuf);
c927df3f	131	OPENSSL_free(rctx);
07e970c7	132	}
07e970c7 DSH	133	}
	134
	135	static int pkey_rsa_sign(EVP_PKEY_CTX ctx, unsigned char sig, int *siglen,
a58a6368	136	const unsigned char *tbs, int tbslen)
07e970c7 DSH	137	{
	138	int ret;
	139	RSA_PKEY_CTX *rctx = ctx->data;
a7ffd9d1	140	RSA *rsa = ctx->pkey->pkey.rsa;
b2a97be7	141
75d44c04	142	if (rctx->md)
b2a97be7	143	{
75d44c04 DSH	144	if (tbslen != EVP_MD_size(rctx->md))
	145	{
	146	RSAerr(RSA_F_PKEY_RSA_SIGN,
	147	RSA_R_INVALID_DIGEST_LENGTH);
	148	return -1;
	149	}
b2a97be7 DSH	150	if (rctx->pad_mode == RSA_X931_PADDING)
	151	{
	152	if (!setup_tbuf(rctx, ctx))
	153	return -1;
	154	memcpy(rctx->tbuf, tbs, tbslen);
75d44c04 DSH	155	rctx->tbuf[tbslen] =
75d44c04 DSH	156	RSA_X931_hash_id(EVP_MD_type(rctx->md));
b2a97be7	157	ret = RSA_private_encrypt(tbslen + 1, rctx->tbuf,
a7ffd9d1	158	sig, rsa, RSA_X931_PADDING);
b2a97be7 DSH	159	}
	160	else if (rctx->pad_mode == RSA_PKCS1_PADDING)
	161	{
	162	unsigned int sltmp;
75d44c04	163	ret = RSA_sign(EVP_MD_type(rctx->md),
a7ffd9d1	164	tbs, tbslen, sig, &sltmp, rsa);
4f59b658 DSH	165	if (ret <= 0)
	166	return ret;
	167	ret = sltmp;
b2a97be7	168	}
a7ffd9d1 DSH	169	else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING)
	170	{
	171	if (!setup_tbuf(rctx, ctx))
	172	return -1;
	173	if (!RSA_padding_add_PKCS1_PSS(rsa, rctx->tbuf, tbs,
	174	rctx->md, rctx->saltlen))
	175	return -1;
	176	ret = RSA_private_encrypt(RSA_size(rsa), rctx->tbuf,
	177	sig, rsa, RSA_NO_PADDING);
	178	}
b2a97be7 DSH	179	else
	180	return -1;
	181	}
	182	else
	183	ret = RSA_private_encrypt(tbslen, tbs, sig, ctx->pkey->pkey.rsa,
07e970c7 DSH	184	rctx->pad_mode);
	185	if (ret < 0)
	186	return ret;
	187	*siglen = ret;
	188	return 1;
	189	}
	190
	191
	192	static int pkey_rsa_verifyrecover(EVP_PKEY_CTX *ctx,
4f59b658 DSH	193	unsigned char rout, int routlen,
4f59b658 DSH	194	const unsigned char *sig, int siglen)
07e970c7 DSH	195	{
	196	int ret;
	197	RSA_PKEY_CTX *rctx = ctx->data;
b2a97be7	198
75d44c04	199	if (rctx->md)
b2a97be7 DSH	200	{
	201	if (rctx->pad_mode == RSA_X931_PADDING)
	202	{
	203	if (!setup_tbuf(rctx, ctx))
	204	return -1;
4f59b658	205	ret = RSA_public_decrypt(siglen, sig,
b2a97be7 DSH	206	rctx->tbuf, ctx->pkey->pkey.rsa,
	207	RSA_X931_PADDING);
	208	if (ret < 1)
	209	return 0;
9fdab72d	210	ret--;
75d44c04 DSH	211	if (rctx->tbuf[ret] !=
75d44c04 DSH	212	RSA_X931_hash_id(EVP_MD_type(rctx->md)))
b2a97be7 DSH	213	{
	214	RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
	215	RSA_R_ALGORITHM_MISMATCH);
	216	return 0;
	217	}
75d44c04 DSH	218	if (ret != EVP_MD_size(rctx->md))
	219	{
	220	RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
	221	RSA_R_INVALID_DIGEST_LENGTH);
	222	return 0;
	223	}
4f59b658 DSH	224	if (rout)
4f59b658 DSH	225	memcpy(rout, rctx->tbuf, ret);
b2a97be7 DSH	226	}
	227	else if (rctx->pad_mode == RSA_PKCS1_PADDING)
	228	{
	229	unsigned int sltmp;
75d44c04	230	ret = int_rsa_verify(EVP_MD_type(rctx->md),
4f59b658 DSH	231	NULL, 0, rout, &sltmp,
4f59b658 DSH	232	sig, siglen, ctx->pkey->pkey.rsa);
716630c0	233	ret = sltmp;
b2a97be7 DSH	234	}
	235	else
	236	return -1;
	237	}
	238	else
4f59b658	239	ret = RSA_public_decrypt(siglen, sig, rout, ctx->pkey->pkey.rsa,
07e970c7 DSH	240	rctx->pad_mode);
	241	if (ret < 0)
	242	return ret;
4f59b658	243	*routlen = ret;
07e970c7 DSH	244	return 1;
	245	}
	246
4f59b658 DSH	247	static int pkey_rsa_verify(EVP_PKEY_CTX *ctx,
	248	const unsigned char *sig, int siglen,
	249	const unsigned char *tbs, int tbslen)
	250	{
	251	RSA_PKEY_CTX *rctx = ctx->data;
a7ffd9d1	252	RSA *rsa = ctx->pkey->pkey.rsa;
4f59b658 DSH	253	int rslen;
	254	if (rctx->md)
	255	{
	256	if (rctx->pad_mode == RSA_PKCS1_PADDING)
	257	return RSA_verify(EVP_MD_type(rctx->md), tbs, tbslen,
a7ffd9d1	258	sig, siglen, rsa);
4f59b658 DSH	259	if (rctx->pad_mode == RSA_X931_PADDING)
	260	{
	261	if (pkey_rsa_verifyrecover(ctx, NULL, &rslen,
	262	sig, siglen) <= 0)
	263	return 0;
	264	}
a7ffd9d1 DSH	265	else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING)
	266	{
	267	int ret;
	268	if (!setup_tbuf(rctx, ctx))
	269	return -1;
	270	ret = RSA_public_decrypt(siglen, sig, rctx->tbuf,
	271	rsa, RSA_NO_PADDING);
	272	if (ret <= 0)
	273	return 0;
	274	ret = RSA_verify_PKCS1_PSS(rsa, tbs, rctx->md,
	275	rctx->tbuf, rctx->saltlen);
	276	if (ret <= 0)
	277	return 0;
	278	return 1;
	279	}
4f59b658 DSH	280	else
	281	return -1;
	282	}
	283	else
	284	{
	285	if (!setup_tbuf(rctx, ctx))
	286	return -1;
	287	rslen = RSA_public_decrypt(siglen, sig, rctx->tbuf,
a7ffd9d1	288	rsa, rctx->pad_mode);
4f59b658 DSH	289	if (rslen <= 0)
	290	return 0;
	291	}
	292
	293	if ((rslen != tbslen) \|\| memcmp(tbs, rctx->tbuf, rslen))
	294	return 0;
	295
	296	return 1;
	297
	298	}
	299
	300
8cd44e36	301	static int pkey_rsa_encrypt(EVP_PKEY_CTX ctx, unsigned char out, int *outlen,
a58a6368	302	const unsigned char *in, int inlen)
8cd44e36 DSH	303	{
	304	int ret;
	305	RSA_PKEY_CTX *rctx = ctx->data;
	306	ret = RSA_public_encrypt(inlen, in, out, ctx->pkey->pkey.rsa,
	307	rctx->pad_mode);
	308	if (ret < 0)
	309	return ret;
	310	*outlen = ret;
	311	return 1;
	312	}
	313
	314	static int pkey_rsa_decrypt(EVP_PKEY_CTX ctx, unsigned char out, int *outlen,
a58a6368	315	const unsigned char *in, int inlen)
8cd44e36 DSH	316	{
	317	int ret;
	318	RSA_PKEY_CTX *rctx = ctx->data;
	319	ret = RSA_private_decrypt(inlen, in, out, ctx->pkey->pkey.rsa,
	320	rctx->pad_mode);
	321	if (ret < 0)
	322	return ret;
	323	*outlen = ret;
	324	return 1;
	325	}
07e970c7	326
75d44c04	327	static int check_padding_md(const EVP_MD *md, int padding)
b2a97be7	328	{
75d44c04	329	if (!md)
b2a97be7	330	return 1;
a7ffd9d1	331
b2a97be7 DSH	332	if (padding == RSA_NO_PADDING)
b2a97be7 DSH	333	{
c927df3f	334	RSAerr(RSA_F_CHECK_PADDING_MD, RSA_R_INVALID_PADDING_MODE);
b2a97be7 DSH	335	return 0;
	336	}
	337
	338	if (padding == RSA_X931_PADDING)
	339	{
75d44c04	340	if (RSA_X931_hash_id(EVP_MD_type(md)) == -1)
b2a97be7	341	{
c927df3f	342	RSAerr(RSA_F_CHECK_PADDING_MD,
b2a97be7 DSH	343	RSA_R_INVALID_X931_DIGEST);
	344	return 0;
	345	}
	346	return 1;
	347	}
	348
	349	return 1;
	350	}
	351
	352
4a3dc3c0 DSH	353	static int pkey_rsa_ctrl(EVP_PKEY_CTX ctx, int type, int p1, void p2)
	354	{
	355	RSA_PKEY_CTX *rctx = ctx->data;
	356	switch (type)
	357	{
4a3dc3c0	358	case EVP_PKEY_CTRL_RSA_PADDING:
29db322e	359	if ((p1 >= RSA_PKCS1_PADDING) && (p1 <= RSA_PKCS1_PSS_PADDING))
4a3dc3c0	360	{
75d44c04	361	if (!check_padding_md(rctx->md, p1))
b2a97be7	362	return 0;
a7ffd9d1 DSH	363	if (p1 == RSA_PKCS1_PSS_PADDING)
a7ffd9d1 DSH	364	{
7f57b076 DSH	365	if (!(ctx->operation &
	366	(EVP_PKEY_OP_SIGN \| EVP_PKEY_OP_VERIFY)))
	367	goto bad_pad;
a7ffd9d1 DSH	368	if (!rctx->md)
	369	rctx->md = EVP_sha1();
	370	}
	371	if (p1 == RSA_PKCS1_OAEP_PADDING)
	372	{
	373	if (!(ctx->operation & EVP_PKEY_OP_TYPE_CRYPT))
7f57b076	374	goto bad_pad;
a7ffd9d1 DSH	375	if (!rctx->md)
	376	rctx->md = EVP_sha1();
	377	}
4a3dc3c0 DSH	378	rctx->pad_mode = p1;
	379	return 1;
	380	}
7f57b076 DSH	381	bad_pad:
	382	RSAerr(RSA_F_PKEY_RSA_CTRL,
	383	RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
6471c9f4	384	return -2;
4a3dc3c0	385
f9a6348a DSH	386	case EVP_PKEY_CTRL_RSA_PSS_SALTLEN:
	387	if (p1 < -2)
	388	return -2;
	389	if (rctx->pad_mode != RSA_PKCS1_PSS_PADDING)
7f57b076 DSH	390	{
7f57b076 DSH	391	RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PSS_SALTLEN);
f9a6348a	392	return -2;
7f57b076	393	}
f9a6348a DSH	394	rctx->saltlen = p1;
	395	return 1;
	396
54d853eb DSH	397	case EVP_PKEY_CTRL_RSA_KEYGEN_BITS:
54d853eb DSH	398	if (p1 < 256)
7f57b076 DSH	399	{
7f57b076 DSH	400	RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_KEYBITS);
54d853eb	401	return -2;
7f57b076	402	}
54d853eb DSH	403	rctx->nbits = p1;
	404	return 1;
	405
	406	case EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP:
	407	if (!p2)
	408	return -2;
	409	rctx->pub_exp = p2;
	410	return 1;
	411
75d44c04 DSH	412	case EVP_PKEY_CTRL_MD:
75d44c04 DSH	413	if (!check_padding_md(p2, rctx->pad_mode))
b2a97be7	414	return 0;
75d44c04	415	rctx->md = p2;
b2a97be7 DSH	416	return 1;
b2a97be7 DSH	417
399a6f0b DSH	418	case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
	419	case EVP_PKEY_CTRL_PKCS7_DECRYPT:
	420	return 1;
	421
4a3dc3c0 DSH	422	default:
	423	return -2;
	424
	425	}
	426	}
	427
	428	static int pkey_rsa_ctrl_str(EVP_PKEY_CTX *ctx,
	429	const char type, const char value)
	430	{
7f57b076 DSH	431	if (!value)
	432	{
	433	RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_VALUE_MISSING);
	434	return 0;
	435	}
4a3dc3c0 DSH	436	if (!strcmp(type, "rsa_padding_mode"))
	437	{
	438	int pm;
4a3dc3c0 DSH	439	if (!strcmp(value, "pkcs1"))
	440	pm = RSA_PKCS1_PADDING;
	441	else if (!strcmp(value, "sslv23"))
	442	pm = RSA_SSLV23_PADDING;
	443	else if (!strcmp(value, "none"))
	444	pm = RSA_NO_PADDING;
	445	else if (!strcmp(value, "oeap"))
	446	pm = RSA_PKCS1_OAEP_PADDING;
	447	else if (!strcmp(value, "x931"))
	448	pm = RSA_X931_PADDING;
29db322e DSH	449	else if (!strcmp(value, "pss"))
29db322e DSH	450	pm = RSA_PKCS1_PSS_PADDING;
4a3dc3c0	451	else
7f57b076 DSH	452	{
	453	RSAerr(RSA_F_PKEY_RSA_CTRL_STR,
	454	RSA_R_UNKNOWN_PADDING_TYPE);
4a3dc3c0	455	return -2;
7f57b076	456	}
6471c9f4	457	return EVP_PKEY_CTX_set_rsa_padding(ctx, pm);
4a3dc3c0	458	}
54d853eb	459
f9a6348a DSH	460	if (!strcmp(type, "rsa_pss_saltlen"))
	461	{
	462	int saltlen;
	463	saltlen = atoi(value);
	464	return EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx, saltlen);
	465	}
54d853eb DSH	466
	467	if (!strcmp(type, "rsa_keygen_bits"))
	468	{
	469	int nbits;
	470	nbits = atoi(value);
	471	return EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, nbits);
	472	}
	473
	474	if (!strcmp(type, "rsa_keygen_pubexp"))
	475	{
	476	int ret;
	477	BIGNUM *pubexp = NULL;
	478	if (!BN_asc2bn(&pubexp, value))
	479	return 0;
	480	ret = EVP_PKEY_CTX_set_rsa_keygen_pubexp(ctx, pubexp);
	481	if (ret <= 0)
	482	BN_free(pubexp);
	483	return ret;
	484	}
	485
4a3dc3c0 DSH	486	return -2;
	487	}
	488
f5cda4cb DSH	489	static int pkey_rsa_keygen(EVP_PKEY_CTX ctx, EVP_PKEY pkey)
	490	{
	491	RSA *rsa = NULL;
	492	RSA_PKEY_CTX *rctx = ctx->data;
	493	BN_GENCB *pcb, cb;
	494	int ret;
	495	if (!rctx->pub_exp)
	496	{
	497	rctx->pub_exp = BN_new();
	498	if (!rctx->pub_exp \|\| !BN_set_word(rctx->pub_exp, RSA_F4))
	499	return 0;
	500	}
	501	rsa = RSA_new();
	502	if (!rsa)
	503	return 0;
	504	if (ctx->pkey_gencb)
	505	{
	506	pcb = &cb;
	507	evp_pkey_set_cb_translate(pcb, ctx);
	508	}
	509	else
	510	pcb = NULL;
	511	ret = RSA_generate_key_ex(rsa, rctx->nbits, rctx->pub_exp, pcb);
	512	if (ret > 0)
	513	EVP_PKEY_assign_RSA(pkey, rsa);
	514	else
	515	RSA_free(rsa);
	516	return ret;
	517	}
	518
0b6f3c66 DSH	519	const EVP_PKEY_METHOD rsa_pkey_meth =
	520	{
	521	EVP_PKEY_RSA,
b010b7c4	522	EVP_PKEY_FLAG_AUTOARGLEN,
07e970c7 DSH	523	pkey_rsa_init,
	524	pkey_rsa_cleanup,
	525
	526	0,0,
	527
f5cda4cb DSH	528	0,
f5cda4cb DSH	529	pkey_rsa_keygen,
07e970c7 DSH	530
	531	0,
	532	pkey_rsa_sign,
	533
4f59b658 DSH	534	0,
4f59b658 DSH	535	pkey_rsa_verify,
07e970c7 DSH	536
07e970c7 DSH	537	0,
8cd44e36 DSH	538	pkey_rsa_verifyrecover,
	539
	540
	541	0,0,0,0,
	542
	543	0,
	544	pkey_rsa_encrypt,
	545
	546	0,
	547	pkey_rsa_decrypt,
	548
d87e6152 DSH	549	0,0,
d87e6152 DSH	550
4a3dc3c0 DSH	551	pkey_rsa_ctrl,
4a3dc3c0 DSH	552	pkey_rsa_ctrl_str
8cd44e36	553
07e970c7	554
0b6f3c66	555	};