/* crypto/dsa/dsa.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.] *//* * The DSS routines are based on patches supplied by * Steven Schoch <schoch@sheba.arc.nasa.gov>.  He basically did the * work and I have just tweaked them a little to fit into my * stylistic vision for SSLeay :-) */#ifndef HEADER_DSA_H#define HEADER_DSA_H#ifdef OPENSSL_NO_DSA#error DSA is disabled.#endif#ifndef OPENSSL_NO_BIO#include <openssl/bio.h>#endif#include <openssl/bn.h>#include <openssl/crypto.h>#include <openssl/ossl_typ.h>#ifndef OPENSSL_NO_DH# include <openssl/dh.h>#endif#define DSA_FLAG_CACHE_MONT_P	0x01#ifdef  __cplusplusextern "C" {#endiftypedef struct dsa_st DSA;typedef struct DSA_SIG_st	{	BIGNUM *r;	BIGNUM *s;	} DSA_SIG;typedef struct dsa_method {	const char *name;	DSA_SIG * (*dsa_do_sign)(const unsigned char *dgst, int dlen, DSA *dsa);	int (*dsa_sign_setup)(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp,								BIGNUM **rp);	int (*dsa_do_verify)(const unsigned char *dgst, int dgst_len,							DSA_SIG *sig, DSA *dsa);	int (*dsa_mod_exp)(DSA *dsa, BIGNUM *rr, BIGNUM *a1, BIGNUM *p1,			BIGNUM *a2, BIGNUM *p2, BIGNUM *m, BN_CTX *ctx,			BN_MONT_CTX *in_mont);	int (*bn_mod_exp)(DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p,				const BIGNUM *m, BN_CTX *ctx,				BN_MONT_CTX *m_ctx); /* Can be null */	int (*init)(DSA *dsa);	int (*finish)(DSA *dsa);	int flags;	char *app_data;} DSA_METHOD;struct dsa_st	{	/* This first variable is used to pick up errors where	 * a DSA is passed instead of of a EVP_PKEY */	int pad;	long version;	int write_params;	BIGNUM *p;	BIGNUM *q;	/* == 20 */	BIGNUM *g;	BIGNUM *pub_key;  /* y public key */	BIGNUM *priv_key; /* x private key */	BIGNUM *kinv;	/* Signing pre-calc */	BIGNUM *r;	/* Signing pre-calc */	int flags;	/* Normally used to cache montgomery values */	char *method_mont_p;	int references;	CRYPTO_EX_DATA ex_data;	const DSA_METHOD *meth;	/* functional reference if 'meth' is ENGINE-provided */	ENGINE *engine;	};#define DSAparams_dup(x) (DSA *)ASN1_dup((int (*)())i2d_DSAparams, \		(char *(*)())d2i_DSAparams,(char *)(x))#define d2i_DSAparams_fp(fp,x) (DSA *)ASN1_d2i_fp((char *(*)())DSA_new, \		(char *(*)())d2i_DSAparams,(fp),(unsigned char **)(x))#define i2d_DSAparams_fp(fp,x) ASN1_i2d_fp(i2d_DSAparams,(fp), \		(unsigned char *)(x))#define d2i_DSAparams_bio(bp,x) (DSA *)ASN1_d2i_bio((char *(*)())DSA_new, \		(char *(*)())d2i_DSAparams,(bp),(unsigned char **)(x))#define i2d_DSAparams_bio(bp,x) ASN1_i2d_bio(i2d_DSAparams,(bp), \		(unsigned char *)(x))DSA_SIG * DSA_SIG_new(void);void	DSA_SIG_free(DSA_SIG *a);int	i2d_DSA_SIG(const DSA_SIG *a, unsigned char **pp);DSA_SIG * d2i_DSA_SIG(DSA_SIG **v, const unsigned char **pp, long length);DSA_SIG * DSA_do_sign(const unsigned char *dgst,int dlen,DSA *dsa);int	DSA_do_verify(const unsigned char *dgst,int dgst_len,		      DSA_SIG *sig,DSA *dsa);const DSA_METHOD *DSA_OpenSSL(void);void	DSA_set_default_method(const DSA_METHOD *);const DSA_METHOD *DSA_get_default_method(void);int	DSA_set_method(DSA *dsa, const DSA_METHOD *);DSA *	DSA_new(void);DSA *	DSA_new_method(ENGINE *engine);void	DSA_free (DSA *r);/* "up" the DSA object's reference count */int	DSA_up_ref(DSA *r);int	DSA_size(const DSA *);	/* next 4 return -1 on error */int	DSA_sign_setup( DSA *dsa,BN_CTX *ctx_in,BIGNUM **kinvp,BIGNUM **rp);int	DSA_sign(int type,const unsigned char *dgst,int dlen,		unsigned char *sig, unsigned int *siglen, DSA *dsa);int	DSA_verify(int type,const unsigned char *dgst,int dgst_len,		const unsigned char *sigbuf, int siglen, DSA *dsa);int DSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,	     CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func);int DSA_set_ex_data(DSA *d, int idx, void *arg);void *DSA_get_ex_data(DSA *d, int idx);DSA *	d2i_DSAPublicKey(DSA **a, const unsigned char **pp, long length);DSA *	d2i_DSAPrivateKey(DSA **a, const unsigned char **pp, long length);DSA * 	d2i_DSAparams(DSA **a, const unsigned char **pp, long length);DSA *	DSA_generate_parameters(int bits,		unsigned char *seed,int seed_len,		int *counter_ret, unsigned long *h_ret,void		(*callback)(int, int, void *),void *cb_arg);int	DSA_generate_key(DSA *a);int	i2d_DSAPublicKey(const DSA *a, unsigned char **pp);int 	i2d_DSAPrivateKey(const DSA *a, unsigned char **pp);int	i2d_DSAparams(const DSA *a,unsigned char **pp);#ifndef OPENSSL_NO_BIOint	DSAparams_print(BIO *bp, const DSA *x);int	DSA_print(BIO *bp, const DSA *x, int off);#endif#ifndef OPENSSL_NO_FP_APIint	DSAparams_print_fp(FILE *fp, const DSA *x);int	DSA_print_fp(FILE *bp, const DSA *x, int off);#endif#define DSS_prime_checks 50/* Primality test according to FIPS PUB 186[-1], Appendix 2.1: * 50 rounds of Rabin-Miller */#define DSA_is_prime(n, callback, cb_arg) \	BN_is_prime(n, DSS_prime_checks, callback, NULL, cb_arg)#ifndef OPENSSL_NO_DH/* Convert DSA structure (key or just parameters) into DH structure * (be careful to avoid small subgroup attacks when using this!) */DH *DSA_dup_DH(const DSA *r);#endif/* 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_DSA_strings(void);/* Error codes for the DSA functions. *//* Function codes. */#define DSA_F_D2I_DSA_SIG				 110#define DSA_F_DSAPARAMS_PRINT				 100#define DSA_F_DSAPARAMS_PRINT_FP			 101#define DSA_F_DSA_DO_SIGN				 112#define DSA_F_DSA_DO_VERIFY				 113#define DSA_F_DSA_NEW_METHOD				 103#define DSA_F_DSA_PRINT					 104#define DSA_F_DSA_PRINT_FP				 105#define DSA_F_DSA_SIGN					 106#define DSA_F_DSA_SIGN_SETUP				 107#define DSA_F_DSA_SIG_NEW				 109#define DSA_F_DSA_VERIFY				 108#define DSA_F_I2D_DSA_SIG				 111#define DSA_F_SIG_CB					 114/* Reason codes. */#define DSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE		 100#define DSA_R_MISSING_PARAMETERS			 101#ifdef  __cplusplus}#endif#endif