[thirdparty/openssl.git] / crypto / evp / pmeth_lib.c

/* pmeth_lib.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 <stdlib.h>
#include "cryptlib.h"
#include <openssl/objects.h>
#include <openssl/evp.h>
#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
#endif
#include "asn1_locl.h"
#include "evp_locl.h"

typedef int sk_cmp_fn_type(const char * const *a, const char * const *b);

DECLARE_STACK_OF(EVP_PKEY_METHOD)
STACK_OF(EVP_PKEY_METHOD) *app_pkey_methods = NULL;

extern const EVP_PKEY_METHOD rsa_pkey_meth, dh_pkey_meth, dsa_pkey_meth;
extern const EVP_PKEY_METHOD ec_pkey_meth, hmac_pkey_meth, cmac_pkey_meth;

static const EVP_PKEY_METHOD *standard_methods[] =
	{
#ifndef OPENSSL_NO_RSA
	&rsa_pkey_meth,
#endif
#ifndef OPENSSL_NO_DH
	&dh_pkey_meth,
#endif
#ifndef OPENSSL_NO_DSA
	&dsa_pkey_meth,
#endif
#ifndef OPENSSL_NO_EC
	&ec_pkey_meth,
#endif
	&hmac_pkey_meth,
	&cmac_pkey_meth
	};

DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
			   pmeth);

static int pmeth_cmp(const EVP_PKEY_METHOD * const *a,
		     const EVP_PKEY_METHOD * const *b)
	{
        return ((*a)->pkey_id - (*b)->pkey_id);
	}

IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
			     pmeth);

const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type)
	{
	EVP_PKEY_METHOD tmp;
	const EVP_PKEY_METHOD *t = &tmp, **ret;
	tmp.pkey_id = type;
	if (app_pkey_methods)
		{
		int idx;
		idx = sk_EVP_PKEY_METHOD_find(app_pkey_methods, &tmp);
		if (idx >= 0)
			return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
		}
	ret = OBJ_bsearch_pmeth(&t, standard_methods,
			  sizeof(standard_methods)/sizeof(EVP_PKEY_METHOD *));
	if (!ret || !*ret)
		return NULL;
	return *ret;
	}

static EVP_PKEY_CTX *int_ctx_new(EVP_PKEY *pkey, ENGINE *e, int id)
	{
	EVP_PKEY_CTX *ret;
	const EVP_PKEY_METHOD *pmeth;
	if (id == -1)
		{
		if (!pkey || !pkey->ameth)
			return NULL;
		id = pkey->ameth->pkey_id;
		}
#ifndef OPENSSL_NO_ENGINE
	if (pkey && pkey->engine)
		e = pkey->engine;
	/* Try to find an ENGINE which implements this method */
	if (e)
		{
		if (!ENGINE_init(e))
			{
			EVPerr(EVP_F_INT_CTX_NEW,ERR_R_ENGINE_LIB);
			return NULL;
			}
		}
	else
		e = ENGINE_get_pkey_meth_engine(id);

	/* If an ENGINE handled this method look it up. Othewise
	 * use internal tables.
	 */

	if (e)
		pmeth = ENGINE_get_pkey_meth(e, id);
	else
#endif
		pmeth = EVP_PKEY_meth_find(id);

	if (pmeth == NULL)
		{
		EVPerr(EVP_F_INT_CTX_NEW,EVP_R_UNSUPPORTED_ALGORITHM);
		return NULL;
		}

	ret = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
	if (!ret)
		{
#ifndef OPENSSL_NO_ENGINE
		if (e)
			ENGINE_finish(e);
#endif
		EVPerr(EVP_F_INT_CTX_NEW,ERR_R_MALLOC_FAILURE);
		return NULL;
		}
	ret->engine = e;
	ret->pmeth = pmeth;
	ret->operation = EVP_PKEY_OP_UNDEFINED;
	ret->pkey = pkey;
	ret->peerkey = NULL;
	ret->pkey_gencb = 0;
	if (pkey)
		CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
	ret->data = NULL;

	if (pmeth->init)
		{
		if (pmeth->init(ret) <= 0)
			{
			EVP_PKEY_CTX_free(ret);
			return NULL;
			}
		}

	return ret;
	}

EVP_PKEY_METHOD* EVP_PKEY_meth_new(int id, int flags)
	{
	EVP_PKEY_METHOD *pmeth;
	pmeth = OPENSSL_malloc(sizeof(EVP_PKEY_METHOD));
	if (!pmeth)
		return NULL;

	pmeth->pkey_id = id;
	pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;

	pmeth->init = 0;
	pmeth->copy = 0;
	pmeth->cleanup = 0;
	pmeth->paramgen_init = 0;
	pmeth->paramgen = 0;
	pmeth->keygen_init = 0;
	pmeth->keygen = 0;
	pmeth->sign_init = 0;
	pmeth->sign = 0;
	pmeth->verify_init = 0;
	pmeth->verify = 0;
	pmeth->verify_recover_init = 0;
	pmeth->verify_recover = 0;
	pmeth->signctx_init = 0;
	pmeth->signctx = 0;
	pmeth->verifyctx_init = 0;
	pmeth->verifyctx = 0;
	pmeth->encrypt_init = 0;
	pmeth->encrypt = 0;
	pmeth->decrypt_init = 0;
	pmeth->decrypt = 0;
	pmeth->derive_init = 0;
	pmeth->derive = 0;
	pmeth->ctrl = 0;
	pmeth->ctrl_str = 0;

	return pmeth;
	}

void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
	{
	if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
		OPENSSL_free(pmeth);
	}

EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
	{
	return int_ctx_new(pkey, e, -1);
	}

EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
	{
	return int_ctx_new(NULL, e, id);
	}

EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx)
	{
	EVP_PKEY_CTX *rctx;
	if (!pctx->pmeth || !pctx->pmeth->copy)
		return NULL;
#ifndef OPENSSL_NO_ENGINE
	/* Make sure it's safe to copy a pkey context using an ENGINE */
	if (pctx->engine && !ENGINE_init(pctx->engine))
		{
		EVPerr(EVP_F_EVP_PKEY_CTX_DUP,ERR_R_ENGINE_LIB);
		return 0;
		}
#endif
	rctx = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
	if (!rctx)
		return NULL;

	rctx->pmeth = pctx->pmeth;
#ifndef OPENSSL_NO_ENGINE
	rctx->engine = pctx->engine;
#endif

	if (pctx->pkey)
		CRYPTO_add(&pctx->pkey->references,1,CRYPTO_LOCK_EVP_PKEY);

	rctx->pkey = pctx->pkey;

	if (pctx->peerkey)
		CRYPTO_add(&pctx->peerkey->references,1,CRYPTO_LOCK_EVP_PKEY);

	rctx->peerkey = pctx->peerkey;

	rctx->data = NULL;
	rctx->app_data = NULL;
	rctx->operation = pctx->operation;

	if (pctx->pmeth->copy(rctx, pctx) > 0)
		return rctx;

	EVP_PKEY_CTX_free(rctx);
	return NULL;

	}

int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
	{
	if (app_pkey_methods == NULL)
		{
		app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
		if (!app_pkey_methods)
			return 0;
		}
	if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth))
		return 0;
	sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
	return 1;
	}

void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
	{
	if (ctx == NULL)
		return;
	if (ctx->pmeth && ctx->pmeth->cleanup)
		ctx->pmeth->cleanup(ctx);
	if (ctx->pkey)
		EVP_PKEY_free(ctx->pkey);
	if (ctx->peerkey)
		EVP_PKEY_free(ctx->peerkey);
#ifndef OPENSSL_NO_ENGINE
	if(ctx->engine)
		/* The EVP_PKEY_CTX we used belongs to an ENGINE, release the
		 * functional reference we held for this reason. */
		ENGINE_finish(ctx->engine);
#endif
	OPENSSL_free(ctx);
	}

int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
				int cmd, int p1, void *p2)
	{
	int ret;
	if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl)
		{
		EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
		return -2;
		}
	if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
		return -1;

	if (ctx->operation == EVP_PKEY_OP_UNDEFINED)
		{
		EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
		return -1;
		}

	if ((optype != -1) && !(ctx->operation & optype))
		{
		EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
		return -1;
		}

	ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);

	if (ret == -2)
		EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);

	return ret;

	}

int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
					const char *name, const char *value)
	{
	if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str)
		{
		EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR,
						EVP_R_COMMAND_NOT_SUPPORTED);
		return -2;
		}
	if (!strcmp(name, "digest"))
		{
		const EVP_MD *md;
		if (!value || !(md = EVP_get_digestbyname(value)))
			{
			EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR,
						EVP_R_INVALID_DIGEST);
			return 0;
			}
		return EVP_PKEY_CTX_set_signature_md(ctx, md);
		}
	return ctx->pmeth->ctrl_str(ctx, name, value);
	}

int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
	{
	return ctx->operation;
	}

void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
	{
	ctx->keygen_info = dat;
	ctx->keygen_info_count = datlen;
	}

void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
	{
	ctx->data = data;
	}

void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx)
	{
	return ctx->data;
	}

EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
	{
	return ctx->pkey;
	}

EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
	{
	return ctx->peerkey;
	}
	
void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
	{
	ctx->app_data = data;
	}

void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
	{
	return ctx->app_data;
	}

void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
	int (*init)(EVP_PKEY_CTX *ctx))
	{
	pmeth->init = init;
	}

void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
	int (*copy)(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src))
	{
	pmeth->copy = copy;
	}

void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
	void (*cleanup)(EVP_PKEY_CTX *ctx))
	{
	pmeth->cleanup = cleanup;
	}

void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
	int (*paramgen_init)(EVP_PKEY_CTX *ctx),
	int (*paramgen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey))
	{
	pmeth->paramgen_init = paramgen_init;
	pmeth->paramgen = paramgen;
	}

void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
	int (*keygen_init)(EVP_PKEY_CTX *ctx),
	int (*keygen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey))
	{
	pmeth->keygen_init = keygen_init;
	pmeth->keygen = keygen;
	}

void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
	int (*sign_init)(EVP_PKEY_CTX *ctx),
	int (*sign)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
					const unsigned char *tbs, size_t tbslen))
	{
	pmeth->sign_init = sign_init;
	pmeth->sign = sign;
	}

void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
	int (*verify_init)(EVP_PKEY_CTX *ctx),
	int (*verify)(EVP_PKEY_CTX *ctx, const unsigned char *sig, size_t siglen,
					const unsigned char *tbs, size_t tbslen))
	{
	pmeth->verify_init = verify_init;
	pmeth->verify = verify;
	}

void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
	int (*verify_recover_init)(EVP_PKEY_CTX *ctx),
	int (*verify_recover)(EVP_PKEY_CTX *ctx,
					unsigned char *sig, size_t *siglen,
					const unsigned char *tbs, size_t tbslen))
	{
	pmeth->verify_recover_init = verify_recover_init;
	pmeth->verify_recover = verify_recover;
	}

void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
	int (*signctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx),
	int (*signctx)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
					EVP_MD_CTX *mctx))
	{
	pmeth->signctx_init = signctx_init;
	pmeth->signctx = signctx;
	}

void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
	int (*verifyctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx),
	int (*verifyctx)(EVP_PKEY_CTX *ctx, const unsigned char *sig,int siglen,
					EVP_MD_CTX *mctx))
	{
	pmeth->verifyctx_init = verifyctx_init;
	pmeth->verifyctx = verifyctx;
	}

void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
	int (*encrypt_init)(EVP_PKEY_CTX *ctx),
	int (*encryptfn)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
					const unsigned char *in, size_t inlen))
	{
	pmeth->encrypt_init = encrypt_init;
	pmeth->encrypt = encryptfn;
	}

void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
	int (*decrypt_init)(EVP_PKEY_CTX *ctx),
	int (*decrypt)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
					const unsigned char *in, size_t inlen))
	{
	pmeth->decrypt_init = decrypt_init;
	pmeth->decrypt = decrypt;
	}

void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
	int (*derive_init)(EVP_PKEY_CTX *ctx),
	int (*derive)(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen))
	{
	pmeth->derive_init = derive_init;
	pmeth->derive = derive;
	}

void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
	int (*ctrl)(EVP_PKEY_CTX *ctx, int type, int p1, void *p2),
	int (*ctrl_str)(EVP_PKEY_CTX *ctx, const char *type, const char *value))
	{
	pmeth->ctrl = ctrl;
	pmeth->ctrl_str = ctrl_str;
	}
Commit	Line	Data
0b6f3c66	1	/* pmeth_lib.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 <stdlib.h>
0b6f3c66	61	#include "cryptlib.h"
c20276e4	62	#include <openssl/objects.h>
5da98aa6	63	#include <openssl/evp.h>
c9777d26 DSH	64	#ifndef OPENSSL_NO_ENGINE
	65	#include <openssl/engine.h>
	66	#endif
cd763898	67	#include "asn1_locl.h"
0b6f3c66 DSH	68	#include "evp_locl.h"
0b6f3c66 DSH	69
ba30bad5	70	typedef int sk_cmp_fn_type(const char * const a, const char const *b);
5ce278a7	71
d4cdbab9	72	DECLARE_STACK_OF(EVP_PKEY_METHOD)
5ce278a7	73	STACK_OF(EVP_PKEY_METHOD) *app_pkey_methods = NULL;
0b6f3c66	74
74633553	75	extern const EVP_PKEY_METHOD rsa_pkey_meth, dh_pkey_meth, dsa_pkey_meth;
c8ef656d	76	extern const EVP_PKEY_METHOD ec_pkey_meth, hmac_pkey_meth, cmac_pkey_meth;
0b6f3c66	77
9e4d0f0b	78	static const EVP_PKEY_METHOD *standard_methods[] =
0b6f3c66	79	{
d4f0339c	80	#ifndef OPENSSL_NO_RSA
c927df3f	81	&rsa_pkey_meth,
d4f0339c DSH	82	#endif
d4f0339c DSH	83	#ifndef OPENSSL_NO_DH
3ba0885a	84	&dh_pkey_meth,
d4f0339c DSH	85	#endif
d4f0339c DSH	86	#ifndef OPENSSL_NO_DSA
9ca7047d	87	&dsa_pkey_meth,
d4f0339c	88	#endif
ef236ec3	89	#ifndef OPENSSL_NO_EC
74633553	90	&ec_pkey_meth,
ef236ec3	91	#endif
74633553	92	&hmac_pkey_meth,
c8ef656d	93	&cmac_pkey_meth
0b6f3c66 DSH	94	};
0b6f3c66 DSH	95
606f6c47	96	DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD , const EVP_PKEY_METHOD ,
e19106f5	97	pmeth);
babb3798	98
0b6f3c66	99	static int pmeth_cmp(const EVP_PKEY_METHOD * const *a,
babb3798	100	const EVP_PKEY_METHOD * const *b)
0b6f3c66 DSH	101	{
	102	return ((a)->pkey_id - (b)->pkey_id);
	103	}
	104
606f6c47	105	IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD , const EVP_PKEY_METHOD ,
e19106f5	106	pmeth);
babb3798	107
c9777d26	108	const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type)
0b6f3c66	109	{
606f6c47 DSH	110	EVP_PKEY_METHOD tmp;
606f6c47 DSH	111	const EVP_PKEY_METHOD t = &tmp, *ret;
0b6f3c66 DSH	112	tmp.pkey_id = type;
	113	if (app_pkey_methods)
	114	{
	115	int idx;
5ce278a7	116	idx = sk_EVP_PKEY_METHOD_find(app_pkey_methods, &tmp);
0b6f3c66	117	if (idx >= 0)
5ce278a7	118	return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
0b6f3c66	119	}
e19106f5 DSH	120	ret = OBJ_bsearch_pmeth(&t, standard_methods,
e19106f5 DSH	121	sizeof(standard_methods)/sizeof(EVP_PKEY_METHOD *));
0b6f3c66 DSH	122	if (!ret \|\| !*ret)
	123	return NULL;
	124	return *ret;
	125	}
	126
f5cda4cb	127	static EVP_PKEY_CTX int_ctx_new(EVP_PKEY pkey, ENGINE *e, int id)
0b6f3c66 DSH	128	{
	129	EVP_PKEY_CTX *ret;
	130	const EVP_PKEY_METHOD *pmeth;
f5cda4cb DSH	131	if (id == -1)
	132	{
	133	if (!pkey \|\| !pkey->ameth)
	134	return NULL;
	135	id = pkey->ameth->pkey_id;
	136	}
a63bf2c5	137	#ifndef OPENSSL_NO_ENGINE
ad889de0 DSH	138	if (pkey && pkey->engine)
ad889de0 DSH	139	e = pkey->engine;
c9777d26 DSH	140	/* Try to find an ENGINE which implements this method */
	141	if (e)
	142	{
	143	if (!ENGINE_init(e))
	144	{
	145	EVPerr(EVP_F_INT_CTX_NEW,ERR_R_ENGINE_LIB);
	146	return NULL;
	147	}
c9777d26	148	}
1892c8bf DSH	149	else
1892c8bf DSH	150	e = ENGINE_get_pkey_meth_engine(id);
c9777d26 DSH	151
c9777d26 DSH	152	/* If an ENGINE handled this method look it up. Othewise
5e428e7d	153	* use internal tables.
c9777d26 DSH	154	*/
	155
	156	if (e)
	157	pmeth = ENGINE_get_pkey_meth(e, id);
	158	else
a63bf2c5	159	#endif
c9777d26 DSH	160	pmeth = EVP_PKEY_meth_find(id);
c9777d26 DSH	161
0b6f3c66	162	if (pmeth == NULL)
01b8b3c7 DSH	163	{
01b8b3c7 DSH	164	EVPerr(EVP_F_INT_CTX_NEW,EVP_R_UNSUPPORTED_ALGORITHM);
0b6f3c66	165	return NULL;
01b8b3c7	166	}
c9777d26	167
0b6f3c66	168	ret = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
1892c8bf DSH	169	if (!ret)
1892c8bf DSH	170	{
a63bf2c5	171	#ifndef OPENSSL_NO_ENGINE
1892c8bf DSH	172	if (e)
1892c8bf DSH	173	ENGINE_finish(e);
a63bf2c5	174	#endif
1892c8bf DSH	175	EVPerr(EVP_F_INT_CTX_NEW,ERR_R_MALLOC_FAILURE);
	176	return NULL;
	177	}
c9777d26	178	ret->engine = e;
0b6f3c66 DSH	179	ret->pmeth = pmeth;
0b6f3c66 DSH	180	ret->operation = EVP_PKEY_OP_UNDEFINED;
cd763898	181	ret->pkey = pkey;
d87e6152	182	ret->peerkey = NULL;
efcf5f1c	183	ret->pkey_gencb = 0;
f5cda4cb DSH	184	if (pkey)
f5cda4cb DSH	185	CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
0b6f3c66 DSH	186	ret->data = NULL;
0b6f3c66 DSH	187
5da98aa6 DSH	188	if (pmeth->init)
	189	{
	190	if (pmeth->init(ret) <= 0)
	191	{
	192	EVP_PKEY_CTX_free(ret);
	193	return NULL;
	194	}
	195	}
	196
0b6f3c66 DSH	197	return ret;
	198	}
	199
ba30bad5 DSH	200	EVP_PKEY_METHOD* EVP_PKEY_meth_new(int id, int flags)
	201	{
	202	EVP_PKEY_METHOD *pmeth;
	203	pmeth = OPENSSL_malloc(sizeof(EVP_PKEY_METHOD));
	204	if (!pmeth)
	205	return NULL;
	206
	207	pmeth->pkey_id = id;
b010b7c4	208	pmeth->flags = flags \| EVP_PKEY_FLAG_DYNAMIC;
ba30bad5 DSH	209
ba30bad5 DSH	210	pmeth->init = 0;
8bdcef40	211	pmeth->copy = 0;
ba30bad5 DSH	212	pmeth->cleanup = 0;
	213	pmeth->paramgen_init = 0;
	214	pmeth->paramgen = 0;
	215	pmeth->keygen_init = 0;
	216	pmeth->keygen = 0;
	217	pmeth->sign_init = 0;
	218	pmeth->sign = 0;
	219	pmeth->verify_init = 0;
	220	pmeth->verify = 0;
	221	pmeth->verify_recover_init = 0;
	222	pmeth->verify_recover = 0;
	223	pmeth->signctx_init = 0;
	224	pmeth->signctx = 0;
	225	pmeth->verifyctx_init = 0;
	226	pmeth->verifyctx = 0;
	227	pmeth->encrypt_init = 0;
	228	pmeth->encrypt = 0;
	229	pmeth->decrypt_init = 0;
	230	pmeth->decrypt = 0;
	231	pmeth->derive_init = 0;
	232	pmeth->derive = 0;
	233	pmeth->ctrl = 0;
	234	pmeth->ctrl_str = 0;
	235
	236	return pmeth;
	237	}
	238
	239	void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
	240	{
b010b7c4	241	if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
ba30bad5 DSH	242	OPENSSL_free(pmeth);
	243	}
	244
f5cda4cb DSH	245	EVP_PKEY_CTX EVP_PKEY_CTX_new(EVP_PKEY pkey, ENGINE *e)
	246	{
	247	return int_ctx_new(pkey, e, -1);
	248	}
	249
	250	EVP_PKEY_CTX EVP_PKEY_CTX_new_id(int id, ENGINE e)
	251	{
	252	return int_ctx_new(NULL, e, id);
	253	}
	254
8bdcef40 DSH	255	EVP_PKEY_CTX EVP_PKEY_CTX_dup(EVP_PKEY_CTX pctx)
	256	{
	257	EVP_PKEY_CTX *rctx;
	258	if (!pctx->pmeth \|\| !pctx->pmeth->copy)
	259	return NULL;
c9777d26 DSH	260	#ifndef OPENSSL_NO_ENGINE
	261	/* Make sure it's safe to copy a pkey context using an ENGINE */
	262	if (pctx->engine && !ENGINE_init(pctx->engine))
	263	{
	264	EVPerr(EVP_F_EVP_PKEY_CTX_DUP,ERR_R_ENGINE_LIB);
	265	return 0;
	266	}
	267	#endif
8bdcef40 DSH	268	rctx = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
	269	if (!rctx)
	270	return NULL;
	271
	272	rctx->pmeth = pctx->pmeth;
c9777d26 DSH	273	#ifndef OPENSSL_NO_ENGINE
	274	rctx->engine = pctx->engine;
	275	#endif
8bdcef40 DSH	276
8bdcef40 DSH	277	if (pctx->pkey)
8bdcef40	278	CRYPTO_add(&pctx->pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
944f8580 DSH	279
944f8580 DSH	280	rctx->pkey = pctx->pkey;
8bdcef40 DSH	281
8bdcef40 DSH	282	if (pctx->peerkey)
8bdcef40	283	CRYPTO_add(&pctx->peerkey->references,1,CRYPTO_LOCK_EVP_PKEY);
944f8580 DSH	284
944f8580 DSH	285	rctx->peerkey = pctx->peerkey;
8bdcef40 DSH	286
	287	rctx->data = NULL;
	288	rctx->app_data = NULL;
	289	rctx->operation = pctx->operation;
	290
	291	if (pctx->pmeth->copy(rctx, pctx) > 0)
944f8580	292	return rctx;
8bdcef40 DSH	293
	294	EVP_PKEY_CTX_free(rctx);
	295	return NULL;
	296
	297	}
	298
ba30bad5 DSH	299	int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
	300	{
	301	if (app_pkey_methods == NULL)
	302	{
5ce278a7	303	app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
ba30bad5 DSH	304	if (!app_pkey_methods)
	305	return 0;
	306	}
5ce278a7	307	if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth))
ba30bad5	308	return 0;
5ce278a7	309	sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
ba30bad5 DSH	310	return 1;
	311	}
	312
5da98aa6 DSH	313	void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
5da98aa6 DSH	314	{
0d5ac5a7 NL	315	if (ctx == NULL)
0d5ac5a7 NL	316	return;
5da98aa6 DSH	317	if (ctx->pmeth && ctx->pmeth->cleanup)
	318	ctx->pmeth->cleanup(ctx);
	319	if (ctx->pkey)
	320	EVP_PKEY_free(ctx->pkey);
ffb1ac67 DSH	321	if (ctx->peerkey)
ffb1ac67 DSH	322	EVP_PKEY_free(ctx->peerkey);
c9777d26 DSH	323	#ifndef OPENSSL_NO_ENGINE
	324	if(ctx->engine)
	325	/* The EVP_PKEY_CTX we used belongs to an ENGINE, release the
	326	* functional reference we held for this reason. */
	327	ENGINE_finish(ctx->engine);
	328	#endif
5da98aa6 DSH	329	OPENSSL_free(ctx);
	330	}
	331
0b6f3c66 DSH	332	int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
	333	int cmd, int p1, void *p2)
	334	{
5da98aa6	335	int ret;
0b6f3c66	336	if (!ctx \|\| !ctx->pmeth \|\| !ctx->pmeth->ctrl)
5da98aa6 DSH	337	{
5da98aa6 DSH	338	EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
0b6f3c66	339	return -2;
5da98aa6	340	}
0b6f3c66 DSH	341	if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
	342	return -1;
	343
	344	if (ctx->operation == EVP_PKEY_OP_UNDEFINED)
	345	{
5da98aa6	346	EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
0b6f3c66 DSH	347	return -1;
	348	}
	349
716630c0	350	if ((optype != -1) && !(ctx->operation & optype))
0b6f3c66	351	{
5da98aa6	352	EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
0b6f3c66 DSH	353	return -1;
	354	}
	355
5da98aa6	356	ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
0b6f3c66	357
5da98aa6 DSH	358	if (ret == -2)
5da98aa6 DSH	359	EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
0b6f3c66	360
5da98aa6	361	return ret;
0b6f3c66	362
5da98aa6	363	}
0b6f3c66	364
4a3dc3c0 DSH	365	int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
4a3dc3c0 DSH	366	const char name, const char value)
f733a5ef	367	{
c927df3f	368	if (!ctx \|\| !ctx->pmeth \|\| !ctx->pmeth->ctrl_str)
f733a5ef	369	{
c927df3f DSH	370	EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR,
c927df3f DSH	371	EVP_R_COMMAND_NOT_SUPPORTED);
f733a5ef DSH	372	return -2;
f733a5ef DSH	373	}
b2a97be7 DSH	374	if (!strcmp(name, "digest"))
	375	{
	376	const EVP_MD *md;
	377	if (!value \|\| !(md = EVP_get_digestbyname(value)))
	378	{
c927df3f DSH	379	EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR,
c927df3f DSH	380	EVP_R_INVALID_DIGEST);
b2a97be7 DSH	381	return 0;
b2a97be7 DSH	382	}
716630c0	383	return EVP_PKEY_CTX_set_signature_md(ctx, md);
b2a97be7	384	}
f733a5ef DSH	385	return ctx->pmeth->ctrl_str(ctx, name, value);
f733a5ef DSH	386	}
f5cda4cb	387
b28dea4e DSH	388	int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
	389	{
	390	return ctx->operation;
	391	}
	392
	393	void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX ctx, int dat, int datlen)
	394	{
	395	ctx->keygen_info = dat;
	396	ctx->keygen_info_count = datlen;
	397	}
	398
f5cda4cb DSH	399	void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX ctx, void data)
	400	{
	401	ctx->data = data;
	402	}
	403
	404	void EVP_PKEY_CTX_get_data(EVP_PKEY_CTX ctx)
	405	{
	406	return ctx->data;
	407	}
	408
81cebb8b DSH	409	EVP_PKEY EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX ctx)
	410	{
	411	return ctx->pkey;
	412	}
	413
0e1dba93 DSH	414	EVP_PKEY EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX ctx)
	415	{
	416	return ctx->peerkey;
	417	}
	418
f5cda4cb DSH	419	void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX ctx, void data)
	420	{
	421	ctx->app_data = data;
	422	}
	423
	424	void EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX ctx)
	425	{
	426	return ctx->app_data;
	427	}
ba30bad5 DSH	428
	429	void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
	430	int (init)(EVP_PKEY_CTX ctx))
	431	{
	432	pmeth->init = init;
8bdcef40 DSH	433	}
	434
	435	void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
	436	int (copy)(EVP_PKEY_CTX dst, EVP_PKEY_CTX *src))
	437	{
	438	pmeth->copy = copy;
ba30bad5 DSH	439	}
	440
	441	void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
	442	void (cleanup)(EVP_PKEY_CTX ctx))
	443	{
	444	pmeth->cleanup = cleanup;
	445	}
	446
	447	void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
	448	int (paramgen_init)(EVP_PKEY_CTX ctx),
	449	int (paramgen)(EVP_PKEY_CTX ctx, EVP_PKEY *pkey))
	450	{
	451	pmeth->paramgen_init = paramgen_init;
	452	pmeth->paramgen = paramgen;
	453	}
	454
	455	void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
	456	int (keygen_init)(EVP_PKEY_CTX ctx),
	457	int (keygen)(EVP_PKEY_CTX ctx, EVP_PKEY *pkey))
	458	{
	459	pmeth->keygen_init = keygen_init;
	460	pmeth->keygen = keygen;
	461	}
	462
	463	void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
	464	int (sign_init)(EVP_PKEY_CTX ctx),
eaff5a14 DSH	465	int (sign)(EVP_PKEY_CTX ctx, unsigned char sig, size_t siglen,
eaff5a14 DSH	466	const unsigned char *tbs, size_t tbslen))
ba30bad5 DSH	467	{
	468	pmeth->sign_init = sign_init;
	469	pmeth->sign = sign;
	470	}
	471
	472	void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
	473	int (verify_init)(EVP_PKEY_CTX ctx),
eaff5a14 DSH	474	int (verify)(EVP_PKEY_CTX ctx, const unsigned char *sig, size_t siglen,
eaff5a14 DSH	475	const unsigned char *tbs, size_t tbslen))
ba30bad5 DSH	476	{
	477	pmeth->verify_init = verify_init;
	478	pmeth->verify = verify;
	479	}
	480
	481	void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
	482	int (verify_recover_init)(EVP_PKEY_CTX ctx),
	483	int (verify_recover)(EVP_PKEY_CTX ctx,
eaff5a14 DSH	484	unsigned char sig, size_t siglen,
eaff5a14 DSH	485	const unsigned char *tbs, size_t tbslen))
ba30bad5 DSH	486	{
	487	pmeth->verify_recover_init = verify_recover_init;
	488	pmeth->verify_recover = verify_recover;
	489	}
	490
	491	void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
	492	int (signctx_init)(EVP_PKEY_CTX ctx, EVP_MD_CTX *mctx),
eaff5a14	493	int (signctx)(EVP_PKEY_CTX ctx, unsigned char sig, size_t siglen,
ba30bad5 DSH	494	EVP_MD_CTX *mctx))
	495	{
	496	pmeth->signctx_init = signctx_init;
	497	pmeth->signctx = signctx;
	498	}
	499
	500	void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
	501	int (verifyctx_init)(EVP_PKEY_CTX ctx, EVP_MD_CTX *mctx),
	502	int (verifyctx)(EVP_PKEY_CTX ctx, const unsigned char *sig,int siglen,
	503	EVP_MD_CTX *mctx))
	504	{
	505	pmeth->verifyctx_init = verifyctx_init;
	506	pmeth->verifyctx = verifyctx;
	507	}
	508
	509	void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
	510	int (encrypt_init)(EVP_PKEY_CTX ctx),
b3f34078	511	int (encryptfn)(EVP_PKEY_CTX ctx, unsigned char out, size_t outlen,
eaff5a14	512	const unsigned char *in, size_t inlen))
ba30bad5 DSH	513	{
ba30bad5 DSH	514	pmeth->encrypt_init = encrypt_init;
b3f34078	515	pmeth->encrypt = encryptfn;
ba30bad5 DSH	516	}
	517
	518	void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
	519	int (decrypt_init)(EVP_PKEY_CTX ctx),
eaff5a14 DSH	520	int (decrypt)(EVP_PKEY_CTX ctx, unsigned char out, size_t outlen,
eaff5a14 DSH	521	const unsigned char *in, size_t inlen))
ba30bad5 DSH	522	{
	523	pmeth->decrypt_init = decrypt_init;
	524	pmeth->decrypt = decrypt;
	525	}
	526
	527	void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
	528	int (derive_init)(EVP_PKEY_CTX ctx),
eaff5a14	529	int (derive)(EVP_PKEY_CTX ctx, unsigned char key, size_t keylen))
ba30bad5 DSH	530	{
	531	pmeth->derive_init = derive_init;
	532	pmeth->derive = derive;
	533	}
	534
	535	void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
	536	int (ctrl)(EVP_PKEY_CTX ctx, int type, int p1, void *p2),
	537	int (ctrl_str)(EVP_PKEY_CTX ctx, const char type, const char value))
	538	{
	539	pmeth->ctrl = ctrl;
	540	pmeth->ctrl_str = ctrl_str;
	541	}