[thirdparty/openssl.git] / include / openssl / 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>.
 */

#ifndef HEADER_DSA_H
# define HEADER_DSA_H

# include <openssl/opensslconf.h>

# ifndef OPENSSL_NO_DSA
# ifdef  __cplusplus
extern "C" {
# endif
# include <openssl/e_os2.h>
# include <openssl/bio.h>
# include <openssl/crypto.h>
# include <openssl/ossl_typ.h>
# include <openssl/opensslconf.h>
# if OPENSSL_API_COMPAT < 0x10100000L
#  include <openssl/bn.h>
#  include <openssl/dh.h>
# endif

# ifndef OPENSSL_DSA_MAX_MODULUS_BITS
#  define OPENSSL_DSA_MAX_MODULUS_BITS   10000
# endif

# define OPENSSL_DSA_FIPS_MIN_MODULUS_BITS 1024

# define DSA_FLAG_CACHE_MONT_P   0x01
/*
 * new with 0.9.7h; the built-in DSA 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 DSA_FLAG_NO_EXP_CONSTTIME       0x02

/*
 * If this flag is set the DSA 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 DSA_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 DSA_FLAG_NON_FIPS_ALLOW                 0x0400
# define DSA_FLAG_FIPS_CHECKED                   0x0800

/* Already defined in ossl_typ.h */
/* typedef struct dsa_st DSA; */
/* typedef struct dsa_method DSA_METHOD; */

typedef struct DSA_SIG_st DSA_SIG;

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);
    /* Can be null */
    int (*bn_mod_exp) (DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p,
                       const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
    int (*init) (DSA *dsa);
    int (*finish) (DSA *dsa);
    int flags;
    char *app_data;
    /* If this is non-NULL, it is used to generate DSA parameters */
    int (*dsa_paramgen) (DSA *dsa, int bits,
                         const unsigned char *seed, int seed_len,
                         int *counter_ret, unsigned long *h_ret,
                         BN_GENCB *cb);
    /* If this is non-NULL, it is used to generate DSA keys */
    int (*dsa_keygen) (DSA *dsa);
};

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;
    BIGNUM *p;
    BIGNUM *q;                  /* == 20 */
    BIGNUM *g;
    BIGNUM *pub_key;            /* y public key */
    BIGNUM *priv_key;           /* x private key */
    int flags;
    /* Normally used to cache montgomery values */
    BN_MONT_CTX *method_mont_p;
    int references;
    CRYPTO_EX_DATA ex_data;
    const DSA_METHOD *meth;
    /* functional reference if 'meth' is ENGINE-provided */
    ENGINE *engine;
    CRYPTO_RWLOCK *lock;
};

# 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) ASN1_d2i_bio_of(DSA,DSA_new,d2i_DSAparams,bp,x)
# define i2d_DSAparams_bio(bp,x) ASN1_i2d_bio_of_const(DSA,i2d_DSAparams,bp,x)

DSA *DSAparams_dup(DSA *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);
void DSA_SIG_get0(BIGNUM **pr, BIGNUM **ps, const DSA_SIG *sig);

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 *);
int DSA_security_bits(const DSA *d);
        /* 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);
#define DSA_get_ex_new_index(l, p, newf, dupf, freef) \
    CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DSA, l, p, newf, dupf, freef)
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);

/* Deprecated version */
DEPRECATEDIN_0_9_8(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))

/* New version */
int DSA_generate_parameters_ex(DSA *dsa, int bits,
                               const unsigned char *seed, int seed_len,
                               int *counter_ret, unsigned long *h_ret,
                               BN_GENCB *cb);

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);

int DSAparams_print(BIO *bp, const DSA *x);
int DSA_print(BIO *bp, const DSA *x, int off);
# ifndef OPENSSL_NO_STDIO
int 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

# define EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, nbits) \
        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN, \
                                EVP_PKEY_CTRL_DSA_PARAMGEN_BITS, nbits, NULL)

# define EVP_PKEY_CTRL_DSA_PARAMGEN_BITS         (EVP_PKEY_ALG_CTRL + 1)
# define EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS       (EVP_PKEY_ALG_CTRL + 2)
# define EVP_PKEY_CTRL_DSA_PARAMGEN_MD           (EVP_PKEY_ALG_CTRL + 3)

/* 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_DO_DSA_PRINT                               104
# define DSA_F_DSAPARAMS_PRINT                            100
# define DSA_F_DSAPARAMS_PRINT_FP                         101
# define DSA_F_DSA_BUILTIN_KEYGEN                         124
# define DSA_F_DSA_BUILTIN_PARAMGEN                       125
# define DSA_F_DSA_BUILTIN_PARAMGEN2                      126
# 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_PARAM_DECODE                           119
# define DSA_F_DSA_PRINT_FP                               105
# define DSA_F_DSA_PRIV_DECODE                            115
# define DSA_F_DSA_PRIV_ENCODE                            116
# define DSA_F_DSA_PUB_DECODE                             117
# define DSA_F_DSA_PUB_ENCODE                             118
# define DSA_F_DSA_SIGN                                   106
# define DSA_F_DSA_SIGN_SETUP                             107
# define DSA_F_DSA_SIG_NEW                                109
# define DSA_F_DSA_SIG_PRINT                              123
# define DSA_F_DSA_VERIFY                                 108
# define DSA_F_I2D_DSA_SIG                                111
# define DSA_F_OLD_DSA_PRIV_DECODE                        122
# define DSA_F_PKEY_DSA_CTRL                              120
# define DSA_F_PKEY_DSA_KEYGEN                            121
# define DSA_F_SIG_CB                                     114

/* Reason codes. */
# define DSA_R_BAD_Q_VALUE                                102
# define DSA_R_BN_DECODE_ERROR                            108
# define DSA_R_BN_ERROR                                   109
# define DSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE                100
# define DSA_R_DECODE_ERROR                               104
# define DSA_R_INVALID_DIGEST_TYPE                        106
# define DSA_R_INVALID_PARAMETERS                         112
# define DSA_R_KEY_SIZE_TOO_SMALL                         111
# define DSA_R_MISSING_PARAMETERS                         101
# define DSA_R_MODULUS_TOO_LARGE                          103
# define DSA_R_NEED_NEW_SETUP_VALUES                      110
# define DSA_R_NO_PARAMETERS_SET                          107
# define DSA_R_PARAMETER_ENCODING_ERROR                   105
# define DSA_R_Q_NOT_PRIME                                113

# ifdef  __cplusplus
}
# endif
# endif

#endif
Commit	Line	Data
	1	/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
	2	* All rights reserved.
	3	*
	4	* This package is an SSL implementation written
	5	* by Eric Young (eay@cryptsoft.com).
	6	* The implementation was written so as to conform with Netscapes SSL.
	7	*
	8	* This library is free for commercial and non-commercial use as long as
	9	* the following conditions are aheared to. The following conditions
	10	* apply to all code found in this distribution, be it the RC4, RSA,
	11	* lhash, DES, etc., code; not just the SSL code. The SSL documentation
	12	* included with this distribution is covered by the same copyright terms
	13	* except that the holder is Tim Hudson (tjh@cryptsoft.com).
	14	*
	15	* Copyright remains Eric Young's, and as such any Copyright notices in
	16	* the code are not to be removed.
	17	* If this package is used in a product, Eric Young should be given attribution
	18	* as the author of the parts of the library used.
	19	* This can be in the form of a textual message at program startup or
	20	* in documentation (online or textual) provided with the package.
	21	*
	22	* Redistribution and use in source and binary forms, with or without
	23	* modification, are permitted provided that the following conditions
	24	* are met:
	25	* 1. Redistributions of source code must retain the copyright
	26	* notice, this list of conditions and the following disclaimer.
	27	* 2. Redistributions in binary form must reproduce the above copyright
	28	* notice, this list of conditions and the following disclaimer in the
	29	* documentation and/or other materials provided with the distribution.
	30	* 3. All advertising materials mentioning features or use of this software
	31	* must display the following acknowledgement:
	32	* "This product includes cryptographic software written by
	33	* Eric Young (eay@cryptsoft.com)"
	34	* The word 'cryptographic' can be left out if the rouines from the library
	35	* being used are not cryptographic related :-).
	36	* 4. If you include any Windows specific code (or a derivative thereof) from
	37	* the apps directory (application code) you must include an acknowledgement:
	38	* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
	39	*
	40	* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
	41	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	42	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	43	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
	44	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	45	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	46	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	47	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	48	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	49	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	50	* SUCH DAMAGE.
	51	*
	52	* The licence and distribution terms for any publically available version or
	53	* derivative of this code cannot be changed. i.e. this code cannot simply be
	54	* copied and put under another distribution licence
	55	* [including the GNU Public Licence.]
	56	*/
	57
	58	/*
	59	* The DSS routines are based on patches supplied by
	60	* Steven Schoch <schoch@sheba.arc.nasa.gov>.
	61	*/
	62
	63	#ifndef HEADER_DSA_H
	64	# define HEADER_DSA_H
	65
	66	# include <openssl/opensslconf.h>
	67
	68	# ifndef OPENSSL_NO_DSA
	69	# ifdef __cplusplus
	70	extern "C" {
	71	# endif
	72	# include <openssl/e_os2.h>
	73	# include <openssl/bio.h>
	74	# include <openssl/crypto.h>
	75	# include <openssl/ossl_typ.h>
	76	# include <openssl/opensslconf.h>
	77	# if OPENSSL_API_COMPAT < 0x10100000L
	78	# include <openssl/bn.h>
	79	# include <openssl/dh.h>
	80	# endif
	81
	82	# ifndef OPENSSL_DSA_MAX_MODULUS_BITS
	83	# define OPENSSL_DSA_MAX_MODULUS_BITS 10000
	84	# endif
	85
	86	# define OPENSSL_DSA_FIPS_MIN_MODULUS_BITS 1024
	87
	88	# define DSA_FLAG_CACHE_MONT_P 0x01
	89	/*
	90	* new with 0.9.7h; the built-in DSA implementation now uses constant time
	91	* modular exponentiation for secret exponents by default. This flag causes
	92	* the faster variable sliding window method to be used for all exponents.
	93	*/
	94	# define DSA_FLAG_NO_EXP_CONSTTIME 0x02
	95
	96	/*
	97	* If this flag is set the DSA method is FIPS compliant and can be used in
	98	* FIPS mode. This is set in the validated module method. If an application
	99	* sets this flag in its own methods it is its reposibility to ensure the
	100	* result is compliant.
	101	*/
	102
	103	# define DSA_FLAG_FIPS_METHOD 0x0400
	104
	105	/*
	106	* If this flag is set the operations normally disabled in FIPS mode are
	107	* permitted it is then the applications responsibility to ensure that the
	108	* usage is compliant.
	109	*/
	110
	111	# define DSA_FLAG_NON_FIPS_ALLOW 0x0400
	112	# define DSA_FLAG_FIPS_CHECKED 0x0800
	113
	114	/* Already defined in ossl_typ.h */
	115	/* typedef struct dsa_st DSA; */
	116	/* typedef struct dsa_method DSA_METHOD; */
	117
	118	typedef struct DSA_SIG_st DSA_SIG;
	119
	120	struct dsa_method {
	121	const char *name;
	122	DSA_SIG (dsa_do_sign) (const unsigned char dgst, int dlen, DSA dsa);
	123	int (dsa_sign_setup) (DSA dsa, BN_CTX ctx_in, BIGNUM *kinvp,
	124	BIGNUM **rp);
	125	int (dsa_do_verify) (const unsigned char dgst, int dgst_len,
	126	DSA_SIG sig, DSA dsa);
	127	int (dsa_mod_exp) (DSA dsa, BIGNUM rr, BIGNUM a1, BIGNUM *p1,
	128	BIGNUM a2, BIGNUM p2, BIGNUM m, BN_CTX ctx,
	129	BN_MONT_CTX *in_mont);
	130	/* Can be null */
	131	int (bn_mod_exp) (DSA dsa, BIGNUM r, BIGNUM a, const BIGNUM *p,
	132	const BIGNUM m, BN_CTX ctx, BN_MONT_CTX *m_ctx);
	133	int (init) (DSA dsa);
	134	int (finish) (DSA dsa);
	135	int flags;
	136	char *app_data;
	137	/* If this is non-NULL, it is used to generate DSA parameters */
	138	int (dsa_paramgen) (DSA dsa, int bits,
	139	const unsigned char *seed, int seed_len,
	140	int counter_ret, unsigned long h_ret,
	141	BN_GENCB *cb);
	142	/* If this is non-NULL, it is used to generate DSA keys */
	143	int (dsa_keygen) (DSA dsa);
	144	};
	145
	146	struct dsa_st {
	147	/*
	148	* This first variable is used to pick up errors where a DSA is passed
	149	* instead of of a EVP_PKEY
	150	*/
	151	int pad;
	152	long version;
	153	BIGNUM *p;
	154	BIGNUM q; / == 20 */
	155	BIGNUM *g;
	156	BIGNUM pub_key; / y public key */
	157	BIGNUM priv_key; / x private key */
	158	int flags;
	159	/* Normally used to cache montgomery values */
	160	BN_MONT_CTX *method_mont_p;
	161	int references;
	162	CRYPTO_EX_DATA ex_data;
	163	const DSA_METHOD *meth;
	164	/* functional reference if 'meth' is ENGINE-provided */
	165	ENGINE *engine;
	166	CRYPTO_RWLOCK *lock;
	167	};
	168
	169	# define d2i_DSAparams_fp(fp,x) (DSA )ASN1_d2i_fp((char (*)())DSA_new, \
	170	(char ()())d2i_DSAparams,(fp),(unsigned char **)(x))
	171	# define i2d_DSAparams_fp(fp,x) ASN1_i2d_fp(i2d_DSAparams,(fp), \
	172	(unsigned char *)(x))
	173	# define d2i_DSAparams_bio(bp,x) ASN1_d2i_bio_of(DSA,DSA_new,d2i_DSAparams,bp,x)
	174	# define i2d_DSAparams_bio(bp,x) ASN1_i2d_bio_of_const(DSA,i2d_DSAparams,bp,x)
	175
	176	DSA DSAparams_dup(DSA x);
	177	DSA_SIG *DSA_SIG_new(void);
	178	void DSA_SIG_free(DSA_SIG *a);
	179	int i2d_DSA_SIG(const DSA_SIG a, unsigned char *pp);
	180	DSA_SIG d2i_DSA_SIG(DSA_SIG v, const unsigned char *pp, long length);
	181	void DSA_SIG_get0(BIGNUM pr, BIGNUM ps, const DSA_SIG *sig);
	182
	183	DSA_SIG DSA_do_sign(const unsigned char dgst, int dlen, DSA *dsa);
	184	int DSA_do_verify(const unsigned char *dgst, int dgst_len,
	185	DSA_SIG sig, DSA dsa);
	186
	187	const DSA_METHOD *DSA_OpenSSL(void);
	188
	189	void DSA_set_default_method(const DSA_METHOD *);
	190	const DSA_METHOD *DSA_get_default_method(void);
	191	int DSA_set_method(DSA dsa, const DSA_METHOD );
	192
	193	DSA *DSA_new(void);
	194	DSA DSA_new_method(ENGINE engine);
	195	void DSA_free(DSA *r);
	196	/* "up" the DSA object's reference count */
	197	int DSA_up_ref(DSA *r);
	198	int DSA_size(const DSA *);
	199	int DSA_security_bits(const DSA *d);
	200	/* next 4 return -1 on error */
	201	int DSA_sign_setup(DSA dsa, BN_CTX ctx_in, BIGNUM kinvp, BIGNUM rp);
	202	int DSA_sign(int type, const unsigned char *dgst, int dlen,
	203	unsigned char sig, unsigned int siglen, DSA *dsa);
	204	int DSA_verify(int type, const unsigned char *dgst, int dgst_len,
	205	const unsigned char sigbuf, int siglen, DSA dsa);
	206	#define DSA_get_ex_new_index(l, p, newf, dupf, freef) \
	207	CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DSA, l, p, newf, dupf, freef)
	208	int DSA_set_ex_data(DSA d, int idx, void arg);
	209	void DSA_get_ex_data(DSA d, int idx);
	210
	211	DSA d2i_DSAPublicKey(DSA a, const unsigned char *pp, long length);
	212	DSA d2i_DSAPrivateKey(DSA a, const unsigned char *pp, long length);
	213	DSA d2i_DSAparams(DSA a, const unsigned char *pp, long length);
	214
	215	/* Deprecated version */
	216	DEPRECATEDIN_0_9_8(DSA *DSA_generate_parameters(int bits,
	217	unsigned char *seed,
	218	int seed_len,
	219	int *counter_ret,
	220	unsigned long *h_ret, void
	221	(*callback) (int, int,
	222	void *),
	223	void *cb_arg))
	224
	225	/* New version */
	226	int DSA_generate_parameters_ex(DSA *dsa, int bits,
	227	const unsigned char *seed, int seed_len,
	228	int counter_ret, unsigned long h_ret,
	229	BN_GENCB *cb);
	230
	231	int DSA_generate_key(DSA *a);
	232	int i2d_DSAPublicKey(const DSA a, unsigned char *pp);
	233	int i2d_DSAPrivateKey(const DSA a, unsigned char *pp);
	234	int i2d_DSAparams(const DSA a, unsigned char *pp);
	235
	236	int DSAparams_print(BIO bp, const DSA x);
	237	int DSA_print(BIO bp, const DSA x, int off);
	238	# ifndef OPENSSL_NO_STDIO
	239	int DSAparams_print_fp(FILE fp, const DSA x);
	240	int DSA_print_fp(FILE bp, const DSA x, int off);
	241	# endif
	242
	243	# define DSS_prime_checks 50
	244	/*
	245	* Primality test according to FIPS PUB 186[-1], Appendix 2.1: 50 rounds of
	246	* Rabin-Miller
	247	*/
	248	# define DSA_is_prime(n, callback, cb_arg) \
	249	BN_is_prime(n, DSS_prime_checks, callback, NULL, cb_arg)
	250
	251	# ifndef OPENSSL_NO_DH
	252	/*
	253	* Convert DSA structure (key or just parameters) into DH structure (be
	254	* careful to avoid small subgroup attacks when using this!)
	255	*/
	256	DH DSA_dup_DH(const DSA r);
	257	# endif
	258
	259	# define EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, nbits) \
	260	EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN, \
	261	EVP_PKEY_CTRL_DSA_PARAMGEN_BITS, nbits, NULL)
	262
	263	# define EVP_PKEY_CTRL_DSA_PARAMGEN_BITS (EVP_PKEY_ALG_CTRL + 1)
	264	# define EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS (EVP_PKEY_ALG_CTRL + 2)
	265	# define EVP_PKEY_CTRL_DSA_PARAMGEN_MD (EVP_PKEY_ALG_CTRL + 3)
	266
	267	/* BEGIN ERROR CODES */
	268	/*
	269	* The following lines are auto generated by the script mkerr.pl. Any changes
	270	* made after this point may be overwritten when the script is next run.
	271	*/
	272	void ERR_load_DSA_strings(void);
	273
	274	/* Error codes for the DSA functions. */
	275
	276	/* Function codes. */
	277	# define DSA_F_D2I_DSA_SIG 110
	278	# define DSA_F_DO_DSA_PRINT 104
	279	# define DSA_F_DSAPARAMS_PRINT 100
	280	# define DSA_F_DSAPARAMS_PRINT_FP 101
	281	# define DSA_F_DSA_BUILTIN_KEYGEN 124
	282	# define DSA_F_DSA_BUILTIN_PARAMGEN 125
	283	# define DSA_F_DSA_BUILTIN_PARAMGEN2 126
	284	# define DSA_F_DSA_DO_SIGN 112
	285	# define DSA_F_DSA_DO_VERIFY 113
	286	# define DSA_F_DSA_NEW_METHOD 103
	287	# define DSA_F_DSA_PARAM_DECODE 119
	288	# define DSA_F_DSA_PRINT_FP 105
	289	# define DSA_F_DSA_PRIV_DECODE 115
	290	# define DSA_F_DSA_PRIV_ENCODE 116
	291	# define DSA_F_DSA_PUB_DECODE 117
	292	# define DSA_F_DSA_PUB_ENCODE 118
	293	# define DSA_F_DSA_SIGN 106
	294	# define DSA_F_DSA_SIGN_SETUP 107
	295	# define DSA_F_DSA_SIG_NEW 109
	296	# define DSA_F_DSA_SIG_PRINT 123
	297	# define DSA_F_DSA_VERIFY 108
	298	# define DSA_F_I2D_DSA_SIG 111
	299	# define DSA_F_OLD_DSA_PRIV_DECODE 122
	300	# define DSA_F_PKEY_DSA_CTRL 120
	301	# define DSA_F_PKEY_DSA_KEYGEN 121
	302	# define DSA_F_SIG_CB 114
	303
	304	/* Reason codes. */
	305	# define DSA_R_BAD_Q_VALUE 102
	306	# define DSA_R_BN_DECODE_ERROR 108
	307	# define DSA_R_BN_ERROR 109
	308	# define DSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE 100
	309	# define DSA_R_DECODE_ERROR 104
	310	# define DSA_R_INVALID_DIGEST_TYPE 106
	311	# define DSA_R_INVALID_PARAMETERS 112
	312	# define DSA_R_KEY_SIZE_TOO_SMALL 111
	313	# define DSA_R_MISSING_PARAMETERS 101
	314	# define DSA_R_MODULUS_TOO_LARGE 103
	315	# define DSA_R_NEED_NEW_SETUP_VALUES 110
	316	# define DSA_R_NO_PARAMETERS_SET 107
	317	# define DSA_R_PARAMETER_ENCODING_ERROR 105
	318	# define DSA_R_Q_NOT_PRIME 113
	319
	320	# ifdef __cplusplus
	321	}
	322	# endif
	323	# endif
	324
	325	#endif