dh.h
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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
- #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
-
- #define DH_FLAG_CACHE_MONT_P 0x01
- #define DH_FLAG_NO_EXP_CONSTTIME 0x02 /* 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.
- */
- #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);
- 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); /* Can be null */
- 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 DHparams_dup(x) ASN1_dup_of_const(DH,i2d_DHparams,d2i_DHparams,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) 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)
- 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
- /* 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 100
- #define DH_F_DHPARAMS_PRINT_FP 101
- #define DH_F_DH_BUILTIN_GENPARAMS 106
- #define DH_F_DH_NEW_METHOD 105
- #define DH_F_GENERATE_KEY 103
- #define DH_F_GENERATE_PARAMETERS 104
- /* Reason codes. */
- #define DH_R_BAD_GENERATOR 101
- #define DH_R_INVALID_PUBKEY 102
- #define DH_R_NO_PRIVATE_VALUE 100
- #ifdef __cplusplus
- }
- #endif
- #endif