evp.h

openssl加密例子

/* crypto/evp/evp.h */
/* Copyright (C) 1995-1998 Eric Young ([e-mail])
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young ([e-mail]).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson ([e-mail]).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * 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 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 acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young ([e-mail])"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson ([e-mail])"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS 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 AUTHOR OR 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.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#ifndef HEADER_ENVELOPE_H
#define HEADER_ENVELOPE_H

#ifdef OPENSSL_ALGORITHM_DEFINES
# include <openssl/opensslconf.h>
#else
# define OPENSSL_ALGORITHM_DEFINES
# include <openssl/opensslconf.h>
# undef OPENSSL_ALGORITHM_DEFINES
#endif

#include <openssl/ossl_typ.h>

#include <openssl/symhacks.h>

#ifndef OPENSSL_NO_BIO
#include <openssl/bio.h>
#endif
#ifndef OPENSSL_NO_MD2
#include <openssl/md2.h>
#endif
#ifndef OPENSSL_NO_MD4
#include <openssl/md4.h>
#endif
#ifndef OPENSSL_NO_MD5
#include <openssl/md5.h>
#endif
#ifndef OPENSSL_NO_SHA
#ifndef OPENSSL_FIPS
#include <openssl/sha.h>
#else
#include <openssl/fips_sha.h>
#endif
#endif
#ifndef OPENSSL_NO_RIPEMD
#include <openssl/ripemd.h>
#endif
#ifndef OPENSSL_NO_DES
#include <openssl/des.h>
#endif
#ifndef OPENSSL_NO_RC4
#include <openssl/rc4.h>
#endif
#ifndef OPENSSL_NO_RC2
#include <openssl/rc2.h>
#endif
#ifndef OPENSSL_NO_RC5
#include <openssl/rc5.h>
#endif
#ifndef OPENSSL_NO_BF
#include <openssl/blowfish.h>
#endif
#ifndef OPENSSL_NO_CAST
#include <openssl/cast.h>
#endif
#ifndef OPENSSL_NO_IDEA
#include <openssl/idea.h>
#endif
#ifndef OPENSSL_NO_MDC2
#include <openssl/mdc2.h>
#endif
#ifndef OPENSSL_NO_AES
#include <openssl/aes.h>
#endif

#ifdef OPENSSL_FIPS
#include <openssl/fips.h>
#endif

/*
#define EVP_RC2_KEY_SIZE		16
#define EVP_RC4_KEY_SIZE		16
#define EVP_BLOWFISH_KEY_SIZE		16
#define EVP_CAST5_KEY_SIZE		16
#define EVP_RC5_32_12_16_KEY_SIZE	16
*/
#ifdef OPENSSL_FIPS
#define EVP_MAX_MD_SIZE			64	/* longest known SHA512 */
#else
#define EVP_MAX_MD_SIZE			(16+20)	/* The SSLv3 md5+sha1 type */
#endif
#define EVP_MAX_KEY_LENGTH		32
#define EVP_MAX_IV_LENGTH		16
#define EVP_MAX_BLOCK_LENGTH		32

#define PKCS5_SALT_LEN			8
/* Default PKCS#5 iteration count */
#define PKCS5_DEFAULT_ITER		2048

#ifndef OPENSSL_NO_RSA
#include <openssl/rsa.h>
#endif

#ifndef OPENSSL_NO_DSA
#include <openssl/dsa.h>
#endif

#ifndef OPENSSL_NO_DH
#include <openssl/dh.h>
#endif

#include <openssl/objects.h>

#define EVP_PK_RSA	0x0001
#define EVP_PK_DSA	0x0002
#define EVP_PK_DH	0x0004
#define EVP_PKT_SIGN	0x0010
#define EVP_PKT_ENC	0x0020
#define EVP_PKT_EXCH	0x0040
#define EVP_PKS_RSA	0x0100
#define EVP_PKS_DSA	0x0200
#define EVP_PKT_EXP	0x1000 /* <= 512 bit key */

#define EVP_PKEY_NONE	NID_undef
#define EVP_PKEY_RSA	NID_rsaEncryption
#define EVP_PKEY_RSA2	NID_rsa
#define EVP_PKEY_DSA	NID_dsa
#define EVP_PKEY_DSA1	NID_dsa_2
#define EVP_PKEY_DSA2	NID_dsaWithSHA
#define EVP_PKEY_DSA3	NID_dsaWithSHA1
#define EVP_PKEY_DSA4	NID_dsaWithSHA1_2
#define EVP_PKEY_DH	NID_dhKeyAgreement

#ifdef	__cplusplus
extern "C" {
#endif

/* Type needs to be a bit field
 * Sub-type needs to be for variations on the method, as in, can it do
 * arbitrary encryption.... */
struct evp_pkey_st
	{
	int type;
	int save_type;
	int references;
	union	{
		char *ptr;
#ifndef OPENSSL_NO_RSA
		struct rsa_st *rsa;	/* RSA */
#endif
#ifndef OPENSSL_NO_DSA
		struct dsa_st *dsa;	/* DSA */
#endif
#ifndef OPENSSL_NO_DH
		struct dh_st *dh;	/* DH */
#endif
		} pkey;
	int save_parameters;
	STACK_OF(X509_ATTRIBUTE) *attributes; /* [ 0 ] */
	} /* EVP_PKEY */;

#define EVP_PKEY_MO_SIGN	0x0001
#define EVP_PKEY_MO_VERIFY	0x0002
#define EVP_PKEY_MO_ENCRYPT	0x0004
#define EVP_PKEY_MO_DECRYPT	0x0008

#if 0
/* This structure is required to tie the message digest and signing together.
 * The lookup can be done by md/pkey_method, oid, oid/pkey_method, or
 * oid, md and pkey.
 * This is required because for various smart-card perform the digest and
 * signing/verification on-board.  To handle this case, the specific
 * EVP_MD and EVP_PKEY_METHODs need to be closely associated.
 * When a PKEY is created, it will have a EVP_PKEY_METHOD associated with it.
 * This can either be software or a token to provide the required low level
 * routines.
 */
typedef struct evp_pkey_md_st
	{
	int oid;
	EVP_MD *md;
	EVP_PKEY_METHOD *pkey;
	} EVP_PKEY_MD;

#define EVP_rsa_md2() \
		EVP_PKEY_MD_add(NID_md2WithRSAEncryption,\
			EVP_rsa_pkcs1(),EVP_md2())
#define EVP_rsa_md5() \
		EVP_PKEY_MD_add(NID_md5WithRSAEncryption,\
			EVP_rsa_pkcs1(),EVP_md5())
#define EVP_rsa_sha0() \
		EVP_PKEY_MD_add(NID_shaWithRSAEncryption,\
			EVP_rsa_pkcs1(),EVP_sha())
#define EVP_rsa_sha1() \
		EVP_PKEY_MD_add(NID_sha1WithRSAEncryption,\
			EVP_rsa_pkcs1(),EVP_sha1())
#define EVP_rsa_ripemd160() \
		EVP_PKEY_MD_add(NID_ripemd160WithRSA,\
			EVP_rsa_pkcs1(),EVP_ripemd160())
#define EVP_rsa_mdc2() \
		EVP_PKEY_MD_add(NID_mdc2WithRSA,\
			EVP_rsa_octet_string(),EVP_mdc2())
#define EVP_dsa_sha() \
		EVP_PKEY_MD_add(NID_dsaWithSHA,\
			EVP_dsa(),EVP_sha())
#define EVP_dsa_sha1() \
		EVP_PKEY_MD_add(NID_dsaWithSHA1,\
			EVP_dsa(),EVP_sha1())

typedef struct evp_pkey_method_st
	{
	char *name;
	int flags;
	int type;		/* RSA, DSA, an SSLeay specific constant */
	int oid;		/* For the pub-key type */
	int encrypt_oid;	/* pub/priv key encryption */

	int (*sign)();
	int (*verify)();
	struct	{
		int (*set)();	/* get and/or set the underlying type */
		int (*get)();
		int (*encrypt)();
		int (*decrypt)();
		int (*i2d)();
		int (*d2i)();
		int (*dup)();
		} pub,priv;
	int (*set_asn1_parameters)();
	int (*get_asn1_parameters)();
	} EVP_PKEY_METHOD;
#endif

#ifndef EVP_MD
struct env_md_st
	{
	int type;
	int pkey_type;
	int md_size;
	unsigned long flags;
	int (*init)(EVP_MD_CTX *ctx);
	int (*update)(EVP_MD_CTX *ctx,const void *data,unsigned long count);
	int (*final)(EVP_MD_CTX *ctx,unsigned char *md);
	int (*copy)(EVP_MD_CTX *to,const EVP_MD_CTX *from);
	int (*cleanup)(EVP_MD_CTX *ctx);

	/* FIXME: prototype these some day */
	int (*sign)();
	int (*verify)();
	int required_pkey_type[5]; /*EVP_PKEY_xxx */
	int block_size;
	int ctx_size; /* how big does the ctx->md_data need to be */
	} /* EVP_MD */;

#define EVP_MD_FLAG_ONESHOT	0x0001 /* digest can only handle a single
					* block */
#define EVP_MD_FLAG_FIPS	0x0400 /* Note if suitable for use in FIPS mode */

#define EVP_PKEY_NULL_method	NULL,NULL,{0,0,0,0}

#ifndef OPENSSL_NO_DSA
#define EVP_PKEY_DSA_method	DSA_sign,DSA_verify, \
				{EVP_PKEY_DSA,EVP_PKEY_DSA2,EVP_PKEY_DSA3, \
					EVP_PKEY_DSA4,0}
#else
#define EVP_PKEY_DSA_method	EVP_PKEY_NULL_method
#endif

#ifndef OPENSSL_NO_RSA
#define EVP_PKEY_RSA_method	RSA_sign,RSA_verify, \
				{EVP_PKEY_RSA,EVP_PKEY_RSA2,0,0}
#define EVP_PKEY_RSA_ASN1_OCTET_STRING_method \
				RSA_sign_ASN1_OCTET_STRING, \
				RSA_verify_ASN1_OCTET_STRING, \
				{EVP_PKEY_RSA,EVP_PKEY_RSA2,0,0}