/* crypto/rsa/rsa.h */

/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

 * All rights reserved.

 *

 * This package is an SSL implementation written

 * by Eric Young (eay@cryptsoft.com).

 * 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 (tjh@cryptsoft.com).

 * 

 * 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 (eay@cryptsoft.com)"

 *    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 (tjh@cryptsoft.com)"

 * 

 * 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_RSA_H

#define HEADER_RSA_H

#include <openssl/asn1.h>

#ifndef OPENSSL_NO_BIO

#include <openssl/bio.h>

#endif

#include <openssl/bn.h>

#include <openssl/crypto.h>

#include <openssl/ossl_typ.h>

#ifdef OPENSSL_NO_RSA

#error RSA is disabled.

#endif

#ifdef  __cplusplus

extern "C" {

#endif

typedef struct rsa_st RSA;

typedef struct rsa_meth_st

	{

	const char *name;

	int (*rsa_pub_enc)(int flen,const unsigned char *from,

			   unsigned char *to,

			   RSA *rsa,int padding);

	int (*rsa_pub_dec)(int flen,const unsigned char *from,

			   unsigned char *to,

			   RSA *rsa,int padding);

	int (*rsa_priv_enc)(int flen,const unsigned char *from,

			    unsigned char *to,

			    RSA *rsa,int padding);

	int (*rsa_priv_dec)(int flen,const unsigned char *from,

			    unsigned char *to,

			    RSA *rsa,int padding);

	int (*rsa_mod_exp)(BIGNUM *r0,const BIGNUM *I,RSA *rsa); /* Can be null */

	int (*bn_mod_exp)(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,

			  const BIGNUM *m, BN_CTX *ctx,

			  BN_MONT_CTX *m_ctx); /* Can be null */

	int (*init)(RSA *rsa);		/* called at new */

	int (*finish)(RSA *rsa);	/* called at free */

	int flags;			/* RSA_METHOD_FLAG_* things */

	char *app_data;			/* may be needed! */

/* New sign and verify functions: some libraries don't allow arbitrary data

 * to be signed/verified: this allows them to be used. Note: for this to work

 * the RSA_public_decrypt() and RSA_private_encrypt() should *NOT* be used

 * RSA_sign(), RSA_verify() should be used instead. Note: for backwards

 * compatibility this functionality is only enabled if the RSA_FLAG_SIGN_VER

 * option is set in 'flags'.

 */

	int (*rsa_sign)(int type,

		const unsigned char *m, unsigned int m_length,

		unsigned char *sigret, unsigned int *siglen, const RSA *rsa);

	int (*rsa_verify)(int dtype,

		const unsigned char *m, unsigned int m_length,

		unsigned char *sigbuf, unsigned int siglen, const RSA *rsa);

	} RSA_METHOD;

struct rsa_st

	{

	/* The first parameter is used to pickup errors where

	 * this is passed instead of aEVP_PKEY, it is set to 0 */

	int pad;

	long version;

	const RSA_METHOD *meth;

	/* functional reference if 'meth' is ENGINE-provided */

	ENGINE *engine;

	BIGNUM *n;

	BIGNUM *e;

	BIGNUM *d;

	BIGNUM *p;

	BIGNUM *q;

	BIGNUM *dmp1;

	BIGNUM *dmq1;

	BIGNUM *iqmp;

	/* be careful using this if the RSA structure is shared */

	CRYPTO_EX_DATA ex_data;

	int references;

	int flags;

	/* Used to cache montgomery values */

	BN_MONT_CTX *_method_mod_n;

	BN_MONT_CTX *_method_mod_p;

	BN_MONT_CTX *_method_mod_q;

	/* all BIGNUM values are actually in the following data, if it is not

	 * NULL */

	char *bignum_data;

	BN_BLINDING *blinding;

	};

#define RSA_3	0x3L

#define RSA_F4	0x10001L

#define RSA_METHOD_FLAG_NO_CHECK	0x01 /* don't check pub/private match */

#define RSA_FLAG_CACHE_PUBLIC		0x02

#define RSA_FLAG_CACHE_PRIVATE		0x04

#define RSA_FLAG_BLINDING		0x08

#define RSA_FLAG_NO_BLINDING		0x80 /* new with 0.9.6j and 0.9.7b; the built-in

                                              * RSA implementation now uses blinding by

                                              * default (ignoring RSA_FLAG_BLINDING),

                                              * but other engines might not need it

                                              */

#define RSA_FLAG_THREAD_SAFE		0x10

/* This flag means the private key operations will be handled by rsa_mod_exp

 * and that they do not depend on the private key components being present:

 * for example a key stored in external hardware. Without this flag bn_mod_exp

 * gets called when private key components are absent.

 */

#define RSA_FLAG_EXT_PKEY		0x20

/* This flag in the RSA_METHOD enables the new rsa_sign, rsa_verify functions.

 */

#define RSA_FLAG_SIGN_VER		0x40

#define RSA_FLAG_NO_BLINDING		0x80

#define RSA_PKCS1_PADDING	1

#define RSA_SSLV23_PADDING	2

#define RSA_NO_PADDING		3

#define RSA_PKCS1_OAEP_PADDING	4

#define RSA_PKCS1_PADDING_SIZE	11

#define RSA_set_app_data(s,arg)         RSA_set_ex_data(s,0,arg)

#define RSA_get_app_data(s)             RSA_get_ex_data(s,0)

RSA *	RSA_new(void);

RSA *	RSA_new_method(ENGINE *engine);

int	RSA_size(const RSA *);

RSA *	RSA_generate_key(int bits, unsigned long e,void

		(*callback)(int,int,void *),void *cb_arg);

int	RSA_check_key(const RSA *);

	/* next 4 return -1 on error */

int	RSA_public_encrypt(int flen, const unsigned char *from,

		unsigned char *to, RSA *rsa,int padding);

int	RSA_private_encrypt(int flen, const unsigned char *from,

		unsigned char *to, RSA *rsa,int padding);

int	RSA_public_decrypt(int flen, const unsigned char *from, 

		unsigned char *to, RSA *rsa,int padding);

int	RSA_private_decrypt(int flen, const unsigned char *from, 

		unsigned char *to, RSA *rsa,int padding);

void	RSA_free (RSA *r);

/* "up" the RSA object's reference count */

int	RSA_up_ref(RSA *r);

int	RSA_flags(const RSA *r);

void RSA_set_default_method(const RSA_METHOD *meth);

const RSA_METHOD *RSA_get_default_method(void);

const RSA_METHOD *RSA_get_method(const RSA *rsa);

int RSA_set_method(RSA *rsa, const RSA_METHOD *meth);

/* This function needs the memory locking malloc callbacks to be installed */

int RSA_memory_lock(RSA *r);

/* these are the actual SSLeay RSA functions */

const RSA_METHOD *RSA_PKCS1_SSLeay(void);

const RSA_METHOD *RSA_null_method(void);

DECLARE_ASN1_ENCODE_FUNCTIONS_const(RSA, RSAPublicKey)

DECLARE_ASN1_ENCODE_FUNCTIONS_const(RSA, RSAPrivateKey)

#ifndef OPENSSL_NO_FP_API

int	RSA_print_fp(FILE *fp, const RSA *r,int offset);

#endif

#ifndef OPENSSL_NO_BIO

int	RSA_print(BIO *bp, const RSA *r,int offset);

#endif

int i2d_RSA_NET(const RSA *a, unsigned char **pp, int (*cb)(), int sgckey);

RSA *d2i_RSA_NET(RSA **a, const unsigned char **pp, long length, int (*cb)(), int sgckey);

int i2d_Netscape_RSA(const RSA *a, unsigned char **pp, int (*cb)());

RSA *d2i_Netscape_RSA(RSA **a, const unsigned char **pp, long length, int (*cb)());

/* The following 2 functions sign and verify a X509_SIG ASN1 object

 * inside PKCS#1 padded RSA encryption */

int RSA_sign(int type, const unsigned char *m, unsigned int m_length,

	unsigned char *sigret, unsigned int *siglen, RSA *rsa);

int RSA_verify(int type, const unsigned char *m, unsigned int m_length,

	unsigned char *sigbuf, unsigned int siglen, RSA *rsa);

/* The following 2 function sign and verify a ASN1_OCTET_STRING

 * object inside PKCS#1 padded RSA encryption */

int RSA_sign_ASN1_OCTET_STRING(int type,

	const unsigned char *m, unsigned int m_length,

	unsigned char *sigret, unsigned int *siglen, RSA *rsa);

int RSA_verify_ASN1_OCTET_STRING(int type,

	const unsigned char *m, unsigned int m_length,

	unsigned char *sigbuf, unsigned int siglen, RSA *rsa);

int RSA_blinding_on(RSA *rsa, BN_CTX *ctx);

void RSA_blinding_off(RSA *rsa);

int RSA_padding_add_PKCS1_type_1(unsigned char *to,int tlen,

	const unsigned char *f,int fl);

int RSA_padding_check_PKCS1_type_1(unsigned char *to,int tlen,

	const unsigned char *f,int fl,int rsa_len);

int RSA_padding_add_PKCS1_type_2(unsigned char *to,int tlen,

	const unsigned char *f,int fl);

int RSA_padding_check_PKCS1_type_2(unsigned char *to,int tlen,

	const unsigned char *f,int fl,int rsa_len);

int RSA_padding_add_PKCS1_OAEP(unsigned char *to,int tlen,

	const unsigned char *f,int fl,

	const unsigned char *p,int pl);

int RSA_padding_check_PKCS1_OAEP(unsigned char *to,int tlen,

	const unsigned char *f,int fl,int rsa_len,

	const unsigned char *p,int pl);

int RSA_padding_add_SSLv23(unsigned char *to,int tlen,

	const unsigned char *f,int fl);

int RSA_padding_check_SSLv23(unsigned char *to,int tlen,

	const unsigned char *f,int fl,int rsa_len);

int RSA_padding_add_none(unsigned char *to,int tlen,

	const unsigned char *f,int fl);

int RSA_padding_check_none(unsigned char *to,int tlen,

	const unsigned char *f,int fl,int rsa_len);

int RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,

	CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func);

int RSA_set_ex_data(RSA *r,int idx,void *arg);

void *RSA_get_ex_data(const RSA *r, int idx);

RSA *RSAPublicKey_dup(RSA *rsa);

RSA *RSAPrivateKey_dup(RSA *rsa);

/* BEGIN ERROR CODES */

/* The following lines are auto generated by the script mkerr.pl. Any changes

 * made after this point may be overwritten when the script is next run.

 */

void ERR_load_RSA_strings(void);

/* Error codes for the RSA functions. */

/* Function codes. */

#define RSA_F_MEMORY_LOCK				 100

#define RSA_F_RSA_CHECK_KEY				 123

#define RSA_F_RSA_EAY_PRIVATE_DECRYPT			 101

#define RSA_F_RSA_EAY_PRIVATE_ENCRYPT			 102

#define RSA_F_RSA_EAY_PUBLIC_DECRYPT			 103

#define RSA_F_RSA_EAY_PUBLIC_ENCRYPT			 104

#define RSA_F_RSA_GENERATE_KEY				 105

#define RSA_F_RSA_NEW_METHOD				 106

#define RSA_F_RSA_NULL					 124

#define RSA_F_RSA_PADDING_ADD_NONE			 107

#define RSA_F_RSA_PADDING_ADD_PKCS1_OAEP		 121

#define RSA_F_RSA_PADDING_ADD_PKCS1_TYPE_1		 108

#define RSA_F_RSA_PADDING_ADD_PKCS1_TYPE_2		 109

#define RSA_F_RSA_PADDING_ADD_SSLV23			 110

#define RSA_F_RSA_PADDING_CHECK_NONE			 111

#define RSA_F_RSA_PADDING_CHECK_PKCS1_OAEP		 122

#define RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1		 112

#define RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2		 113

#define RSA_F_RSA_PADDING_CHECK_SSLV23			 114

#define RSA_F_RSA_PRINT					 115

#define RSA_F_RSA_PRINT_FP				 116

#define RSA_F_RSA_SIGN					 117

#define RSA_F_RSA_SIGN_ASN1_OCTET_STRING		 118

#define RSA_F_RSA_VERIFY				 119

#define RSA_F_RSA_VERIFY_ASN1_OCTET_STRING		 120

/* Reason codes. */

#define RSA_R_ALGORITHM_MISMATCH			 100

#define RSA_R_BAD_E_VALUE				 101

#define RSA_R_BAD_FIXED_HEADER_DECRYPT			 102

#define RSA_R_BAD_PAD_BYTE_COUNT			 103

#define RSA_R_BAD_SIGNATURE				 104

#define RSA_R_BLOCK_TYPE_IS_NOT_01			 106

#define RSA_R_BLOCK_TYPE_IS_NOT_02			 107

#define RSA_R_DATA_GREATER_THAN_MOD_LEN			 108

#define RSA_R_DATA_TOO_LARGE				 109

#define RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE		 110

#define RSA_R_DATA_TOO_LARGE_FOR_MODULUS		 132

#define RSA_R_DATA_TOO_SMALL				 111

#define RSA_R_DATA_TOO_SMALL_FOR_KEY_SIZE		 122

#define RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY		 112

#define RSA_R_DMP1_NOT_CONGRUENT_TO_D			 124

#define RSA_R_DMQ1_NOT_CONGRUENT_TO_D			 125

#define RSA_R_D_E_NOT_CONGRUENT_TO_1			 123

#define RSA_R_INVALID_MESSAGE_LENGTH			 131

#define RSA_R_IQMP_NOT_INVERSE_OF_Q			 126

#define RSA_R_KEY_SIZE_TOO_SMALL			 120

#define RSA_R_NULL_BEFORE_BLOCK_MISSING			 113

#define RSA_R_N_DOES_NOT_EQUAL_P_Q			 127

#define RSA_R_OAEP_DECODING_ERROR			 121

#define RSA_R_PADDING_CHECK_FAILED			 114

#define RSA_R_P_NOT_PRIME				 128

#define RSA_R_Q_NOT_PRIME				 129

#define RSA_R_RSA_OPERATIONS_NOT_SUPPORTED		 130

#define RSA_R_SSLV3_ROLLBACK_ATTACK			 115

#define RSA_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD 116

#define RSA_R_UNKNOWN_ALGORITHM_TYPE			 117

#define RSA_R_UNKNOWN_PADDING_TYPE			 118

#define RSA_R_WRONG_SIGNATURE_LENGTH			 119

#ifdef  __cplusplus

}

#endif

#endif