LCOM1920-T02G10

/* 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

# include <openssl/e_os2.h>

# ifdef OPENSSL_NO_DSA

#  error DSA is disabled.

# endif

# ifndef OPENSSL_NO_BIO

#  include <openssl/bio.h>

# endif

# include <openssl/crypto.h>

# include <openssl/ossl_typ.h>

# ifndef OPENSSL_NO_DEPRECATED

#  include <openssl/bn.h>

#  ifndef OPENSSL_NO_DH

#   include <openssl/dh.h>

#  endif

# endif

# ifndef OPENSSL_DSA_MAX_MODULUS_BITS

#  define OPENSSL_DSA_MAX_MODULUS_BITS   10000

# endif

# 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

#ifdef  __cplusplus

extern "C" {

#endif

/* Already defined in ossl_typ.h */

/* typedef struct dsa_st DSA; */

/* typedef struct dsa_method DSA_METHOD; */

typedef struct DSA_SIG_st {

    BIGNUM *r;

    BIGNUM *s;

} 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;

    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 */

    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;

};

# 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);

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);

/* Deprecated version */

# ifndef OPENSSL_NO_DEPRECATED

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);

# endif                         /* !defined(OPENSSL_NO_DEPRECATED) */

/* 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);

# ifndef OPENSSL_NO_BIO

int DSAparams_print(BIO *bp, const DSA *x);

int DSA_print(BIO *bp, const DSA *x, int off);

# endif

# ifndef OPENSSL_NO_FP_API

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_DO_SIGN                                112

# define DSA_F_DSA_DO_VERIFY                              113

# define DSA_F_DSA_GENERATE_KEY                           124

# define DSA_F_DSA_GENERATE_PARAMETERS_EX                 123

# 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                              125

# 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_MISSING_PARAMETERS                         101

# define DSA_R_MODULUS_TOO_LARGE                          103

# define DSA_R_NEED_NEW_SETUP_VALUES                      110

# define DSA_R_NON_FIPS_DSA_METHOD                        111

# define DSA_R_NO_PARAMETERS_SET                          107

# define DSA_R_PARAMETER_ENCODING_ERROR                   105

#ifdef  __cplusplus

}

#endif

#endif