LCOM1920-T02G10

/* crypto/dh/dh.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_DH_H

# define HEADER_DH_H

# include <openssl/e_os2.h>

# ifdef OPENSSL_NO_DH

#  error DH is disabled.

# endif

# ifndef OPENSSL_NO_BIO

#  include <openssl/bio.h>

# endif

# include <openssl/ossl_typ.h>

# ifndef OPENSSL_NO_DEPRECATED

#  include <openssl/bn.h>

# endif

# ifndef OPENSSL_DH_MAX_MODULUS_BITS

#  define OPENSSL_DH_MAX_MODULUS_BITS    10000

# endif

# define DH_FLAG_CACHE_MONT_P     0x01

/*

 * new with 0.9.7h; the built-in DH

 * implementation now uses constant time

 * modular exponentiation for secret exponents

 * by default. This flag causes the

 * faster variable sliding window method to

 * be used for all exponents.

 */

# define DH_FLAG_NO_EXP_CONSTTIME 0x02

/*

 * If this flag is set the DH method is FIPS compliant and can be used in

 * FIPS mode. This is set in the validated module method. If an application

 * sets this flag in its own methods it is its reposibility to ensure the

 * result is compliant.

 */

# define DH_FLAG_FIPS_METHOD                     0x0400

/*

 * If this flag is set the operations normally disabled in FIPS mode are

 * permitted it is then the applications responsibility to ensure that the

 * usage is compliant.

 */

# define DH_FLAG_NON_FIPS_ALLOW                  0x0400

#ifdef  __cplusplus

extern "C" {

#endif

/* Already defined in ossl_typ.h */

/* typedef struct dh_st DH; */

/* typedef struct dh_method DH_METHOD; */

struct dh_method {

    const char *name;

    /* Methods here */

    int (*generate_key) (DH *dh);

    int (*compute_key) (unsigned char *key, const BIGNUM *pub_key, DH *dh);

    /* Can be null */

    int (*bn_mod_exp) (const DH *dh, BIGNUM *r, const BIGNUM *a,

                       const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,

                       BN_MONT_CTX *m_ctx);

    int (*init) (DH *dh);

    int (*finish) (DH *dh);

    int flags;

    char *app_data;

    /* If this is non-NULL, it will be used to generate parameters */

    int (*generate_params) (DH *dh, int prime_len, int generator,

                            BN_GENCB *cb);

};

struct dh_st {

    /*

     * This first argument is used to pick up errors when a DH is passed

     * instead of a EVP_PKEY

     */

    int pad;

    int version;

    BIGNUM *p;

    BIGNUM *g;

    long length;                /* optional */

    BIGNUM *pub_key;            /* g^x */

    BIGNUM *priv_key;           /* x */

    int flags;

    BN_MONT_CTX *method_mont_p;

    /* Place holders if we want to do X9.42 DH */

    BIGNUM *q;

    BIGNUM *j;

    unsigned char *seed;

    int seedlen;

    BIGNUM *counter;

    int references;

    CRYPTO_EX_DATA ex_data;

    const DH_METHOD *meth;

    ENGINE *engine;

};

# define DH_GENERATOR_2          2

/* #define DH_GENERATOR_3       3 */

# define DH_GENERATOR_5          5

/* DH_check error codes */

# define DH_CHECK_P_NOT_PRIME            0x01

# define DH_CHECK_P_NOT_SAFE_PRIME       0x02

# define DH_UNABLE_TO_CHECK_GENERATOR    0x04

# define DH_NOT_SUITABLE_GENERATOR       0x08

/* DH_check_pub_key error codes */

# define DH_CHECK_PUBKEY_TOO_SMALL       0x01

# define DH_CHECK_PUBKEY_TOO_LARGE       0x02

/*

 * primes p where (p-1)/2 is prime too are called "safe"; we define this for

 * backward compatibility:

 */

# define DH_CHECK_P_NOT_STRONG_PRIME     DH_CHECK_P_NOT_SAFE_PRIME

# define d2i_DHparams_fp(fp,x) (DH *)ASN1_d2i_fp((char *(*)())DH_new, \

                (char *(*)())d2i_DHparams,(fp),(unsigned char **)(x))

# define i2d_DHparams_fp(fp,x) ASN1_i2d_fp(i2d_DHparams,(fp), \

                (unsigned char *)(x))

# define d2i_DHparams_bio(bp,x) ASN1_d2i_bio_of(DH,DH_new,d2i_DHparams,bp,x)

# define i2d_DHparams_bio(bp,x) ASN1_i2d_bio_of_const(DH,i2d_DHparams,bp,x)

DH *DHparams_dup(DH *);

const DH_METHOD *DH_OpenSSL(void);

void DH_set_default_method(const DH_METHOD *meth);

const DH_METHOD *DH_get_default_method(void);

int DH_set_method(DH *dh, const DH_METHOD *meth);

DH *DH_new_method(ENGINE *engine);

DH *DH_new(void);

void DH_free(DH *dh);

int DH_up_ref(DH *dh);

int DH_size(const DH *dh);

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

                        CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func);

int DH_set_ex_data(DH *d, int idx, void *arg);

void *DH_get_ex_data(DH *d, int idx);

/* Deprecated version */

# ifndef OPENSSL_NO_DEPRECATED

DH *DH_generate_parameters(int prime_len, int generator,

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

# endif                         /* !defined(OPENSSL_NO_DEPRECATED) */

/* New version */

int DH_generate_parameters_ex(DH *dh, int prime_len, int generator,

                              BN_GENCB *cb);

int DH_check(const DH *dh, int *codes);

int DH_check_pub_key(const DH *dh, const BIGNUM *pub_key, int *codes);

int DH_generate_key(DH *dh);

int DH_compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh);

DH *d2i_DHparams(DH **a, const unsigned char **pp, long length);

int i2d_DHparams(const DH *a, unsigned char **pp);

# ifndef OPENSSL_NO_FP_API

int DHparams_print_fp(FILE *fp, const DH *x);

# endif

# ifndef OPENSSL_NO_BIO

int DHparams_print(BIO *bp, const DH *x);

# else

int DHparams_print(char *bp, const DH *x);

# endif

# define EVP_PKEY_CTX_set_dh_paramgen_prime_len(ctx, len) \

        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \

                        EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN, len, NULL)

# define EVP_PKEY_CTX_set_dh_paramgen_generator(ctx, gen) \

        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \

                        EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR, gen, NULL)

# define EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN     (EVP_PKEY_ALG_CTRL + 1)

# define EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR     (EVP_PKEY_ALG_CTRL + 2)

/* 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_DH_strings(void);

/* Error codes for the DH functions. */

/* Function codes. */

# define DH_F_COMPUTE_KEY                                 102

# define DH_F_DHPARAMS_PRINT_FP                           101

# define DH_F_DH_BUILTIN_GENPARAMS                        106

# define DH_F_DH_COMPUTE_KEY                              114

# define DH_F_DH_GENERATE_KEY                             115

# define DH_F_DH_GENERATE_PARAMETERS_EX                   116

# define DH_F_DH_NEW_METHOD                               105

# define DH_F_DH_PARAM_DECODE                             107

# define DH_F_DH_PRIV_DECODE                              110

# define DH_F_DH_PRIV_ENCODE                              111

# define DH_F_DH_PUB_DECODE                               108

# define DH_F_DH_PUB_ENCODE                               109

# define DH_F_DO_DH_PRINT                                 100

# define DH_F_GENERATE_KEY                                103

# define DH_F_GENERATE_PARAMETERS                         104

# define DH_F_PKEY_DH_DERIVE                              112

# define DH_F_PKEY_DH_KEYGEN                              113

/* Reason codes. */

# define DH_R_BAD_GENERATOR                               101

# define DH_R_BN_DECODE_ERROR                             109

# define DH_R_BN_ERROR                                    106

# define DH_R_DECODE_ERROR                                104

# define DH_R_INVALID_PUBKEY                              102

# define DH_R_KEYS_NOT_SET                                108

# define DH_R_KEY_SIZE_TOO_SMALL                          110

# define DH_R_MODULUS_TOO_LARGE                           103

# define DH_R_NON_FIPS_METHOD                             111

# define DH_R_NO_PARAMETERS_SET                           107

# define DH_R_NO_PRIVATE_VALUE                            100

# define DH_R_PARAMETER_ENCODING_ERROR                    105

#ifdef  __cplusplus

}

#endif

#endif