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

/* pmeth_lib.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 <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);
STACK *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;

static const EVP_PKEY_METHOD *standard_methods[] =
	{
	&rsa_pkey_meth,
	&dh_pkey_meth,
	&dsa_pkey_meth,
	&ec_pkey_meth,
	&hmac_pkey_meth,
	};

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

const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type)
	{
	EVP_PKEY_METHOD tmp, *t = &tmp, **ret;
	tmp.pkey_id = type;
	if (app_pkey_methods)
		{
		int idx;
		idx = sk_find(app_pkey_methods, (char *)&tmp);
		if (idx >= 0)
			return (EVP_PKEY_METHOD *)
				sk_value(app_pkey_methods, idx);
		}
	ret = (EVP_PKEY_METHOD **) OBJ_bsearch((char *)&t,
        		(char *)standard_methods,
			sizeof(standard_methods)/sizeof(EVP_PKEY_METHOD *),
        		sizeof(EVP_PKEY_METHOD *),
			(int (*)(const void *, const void *))pmeth_cmp);
	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;
		}
	/* 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
		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)
		{
		if (e)
			ENGINE_finish(e);
		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;
	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_new((sk_cmp_fn_type *)pmeth_cmp);
		if (!app_pkey_methods)
			return 0;
		}
	if (!sk_push(app_pkey_methods, (char *)pmeth))
		return 0;
	sk_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;
	}

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

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