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openssl/crypto/dh/dh.h
Richard Levitte ef33b97050 Using checks of the existence of HEADER_{foo}_H in other header files 
was a really bad idea.  For example, the following:

	#include <x509.h>
	#include <bio.h>
	#include <asn1.h>

would make sure that things like ASN1_UTCTIME_print() wasn't defined
unless you moved the inclusion of bio.h to above the inclusion of
x509.h.  The reason is that x509.h includes asn1.h, and the
declaration of ASN1_UTCTIME_print() depended on the definition of
HEADER_BIO_H.  That's what I call an obscure bug.

Instead, this change makes sure that whatever header files are needed
for the correct process of one header file are included automagically,
and that the definitions of, for example, BIO-related things are
dependent on the absence of the NO_{foo} macros.  This is also
consistent with the way parts of OpenSSL can be excluded at will.
2000-06-09 10:41:35 +00:00

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/* 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
#ifdef NO_DH
#error DH is disabled.
#endif
#ifndef NO_BIO
#include <openssl/bio.h>
#endif
#include <openssl/bn.h>
#include <openssl/crypto.h>
#define DH_FLAG_CACHE_MONT_P 0x01
#ifdef __cplusplus
extern "C" {
#endif
typedef struct dh_st DH;
typedef struct dh_method {
const char *name;
/* Methods here */
int (*generate_key)(DH *dh);
int (*compute_key)(unsigned char *key,BIGNUM *pub_key,DH *dh);
int (*bn_mod_exp)(DH *dh, BIGNUM *r, BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx,
BN_MONT_CTX *m_ctx); /* Can be null */
int (*init)(DH *dh);
int (*finish)(DH *dh);
int flags;
char *app_data;
} DH_METHOD;
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;
int length; /* optional */
BIGNUM *pub_key; /* g^x */
BIGNUM *priv_key; /* x */
int flags;
char *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;
DH_METHOD *meth;
};
#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
/* 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 DHparams_dup(x) (DH *)ASN1_dup((int (*)())i2d_DHparams, \
(char *(*)())d2i_DHparams,(char *)(x))
#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) (DH *)ASN1_d2i_bio((char *(*)())DH_new, \
(char *(*)())d2i_DHparams,(bp),(unsigned char **)(x))
#ifdef __cplusplus
#define i2d_DHparams_bio(bp,x) ASN1_i2d_bio((int (*)())i2d_DHparams,(bp), \
(unsigned char *)(x))
#else
#define i2d_DHparams_bio(bp,x) ASN1_i2d_bio(i2d_DHparams,(bp), \
(unsigned char *)(x))
#endif
DH_METHOD *DH_OpenSSL(void);
void DH_set_default_method(DH_METHOD *meth);
DH_METHOD *DH_get_default_method(void);
DH_METHOD *DH_set_method(DH *dh, DH_METHOD *meth);
DH *DH_new_method(DH_METHOD *meth);
DH * DH_new(void);
void DH_free(DH *dh);
int DH_size(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);
DH * DH_generate_parameters(int prime_len,int generator,
void (*callback)(int,int,void *),void *cb_arg);
int DH_check(DH *dh,int *codes);
int DH_generate_key(DH *dh);
int DH_compute_key(unsigned char *key,BIGNUM *pub_key,DH *dh);
DH * d2i_DHparams(DH **a,unsigned char **pp, long length);
int i2d_DHparams(DH *a,unsigned char **pp);
#ifndef NO_FP_API
int DHparams_print_fp(FILE *fp, DH *x);
#endif
#ifndef NO_BIO
int DHparams_print(BIO *bp, DH *x);
#else
int DHparams_print(char *bp, DH *x);
#endif
void ERR_load_DH_strings(void );
/* 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.
*/
/* Error codes for the DH functions. */
/* Function codes. */
#define DH_F_DHPARAMS_PRINT 100
#define DH_F_DHPARAMS_PRINT_FP 101
#define DH_F_DH_COMPUTE_KEY 102
#define DH_F_DH_GENERATE_KEY 103
#define DH_F_DH_GENERATE_PARAMETERS 104
#define DH_F_DH_NEW 105
/* Reason codes. */
#define DH_R_NO_PRIVATE_VALUE 100
#ifdef __cplusplus
}
#endif
#endif
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