235 lines
8.2 KiB
C
235 lines
8.2 KiB
C
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/* crypto/dh/dh.h */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#ifndef HEADER_DH_H
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#define HEADER_DH_H
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#include <openssl/e_os2.h>
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#ifdef OPENSSL_NO_DH
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#error DH is disabled.
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#endif
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#ifndef OPENSSL_NO_BIO
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#include <openssl/bio.h>
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#endif
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#include <openssl/ossl_typ.h>
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#ifndef OPENSSL_NO_DEPRECATED
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#include <openssl/bn.h>
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#endif
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#ifndef OPENSSL_DH_MAX_MODULUS_BITS
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# define OPENSSL_DH_MAX_MODULUS_BITS 10000
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#endif
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#define DH_FLAG_CACHE_MONT_P 0x01
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#define DH_FLAG_NO_EXP_CONSTTIME 0x02 /* new with 0.9.7h; the built-in DH
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* implementation now uses constant time
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* modular exponentiation for secret exponents
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* by default. This flag causes the
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* faster variable sliding window method to
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* be used for all exponents.
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Already defined in ossl_typ.h */
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/* typedef struct dh_st DH; */
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/* typedef struct dh_method DH_METHOD; */
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struct dh_method
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{
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const char *name;
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/* Methods here */
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int (*generate_key)(DH *dh);
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int (*compute_key)(unsigned char *key,const BIGNUM *pub_key,DH *dh);
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int (*bn_mod_exp)(const DH *dh, BIGNUM *r, const BIGNUM *a,
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const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
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BN_MONT_CTX *m_ctx); /* Can be null */
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int (*init)(DH *dh);
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int (*finish)(DH *dh);
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int flags;
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char *app_data;
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/* If this is non-NULL, it will be used to generate parameters */
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int (*generate_params)(DH *dh, int prime_len, int generator, BN_GENCB *cb);
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};
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struct dh_st
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{
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/* This first argument is used to pick up errors when
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* a DH is passed instead of a EVP_PKEY */
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int pad;
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int version;
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BIGNUM *p;
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BIGNUM *g;
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long length; /* optional */
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BIGNUM *pub_key; /* g^x */
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BIGNUM *priv_key; /* x */
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int flags;
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BN_MONT_CTX *method_mont_p;
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/* Place holders if we want to do X9.42 DH */
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BIGNUM *q;
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BIGNUM *j;
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unsigned char *seed;
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int seedlen;
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BIGNUM *counter;
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int references;
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CRYPTO_EX_DATA ex_data;
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const DH_METHOD *meth;
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ENGINE *engine;
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};
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#define DH_GENERATOR_2 2
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/* #define DH_GENERATOR_3 3 */
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#define DH_GENERATOR_5 5
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/* DH_check error codes */
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#define DH_CHECK_P_NOT_PRIME 0x01
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#define DH_CHECK_P_NOT_SAFE_PRIME 0x02
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#define DH_UNABLE_TO_CHECK_GENERATOR 0x04
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#define DH_NOT_SUITABLE_GENERATOR 0x08
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/* DH_check_pub_key error codes */
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#define DH_CHECK_PUBKEY_TOO_SMALL 0x01
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#define DH_CHECK_PUBKEY_TOO_LARGE 0x02
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/* primes p where (p-1)/2 is prime too are called "safe"; we define
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this for backward compatibility: */
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#define DH_CHECK_P_NOT_STRONG_PRIME DH_CHECK_P_NOT_SAFE_PRIME
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#define DHparams_dup(x) ASN1_dup_of_const(DH,i2d_DHparams,d2i_DHparams,x)
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#define d2i_DHparams_fp(fp,x) (DH *)ASN1_d2i_fp((char *(*)())DH_new, \
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(char *(*)())d2i_DHparams,(fp),(unsigned char **)(x))
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#define i2d_DHparams_fp(fp,x) ASN1_i2d_fp(i2d_DHparams,(fp), \
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(unsigned char *)(x))
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#define d2i_DHparams_bio(bp,x) ASN1_d2i_bio_of(DH,DH_new,d2i_DHparams,bp,x)
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#define i2d_DHparams_bio(bp,x) ASN1_i2d_bio_of_const(DH,i2d_DHparams,bp,x)
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const DH_METHOD *DH_OpenSSL(void);
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void DH_set_default_method(const DH_METHOD *meth);
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const DH_METHOD *DH_get_default_method(void);
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int DH_set_method(DH *dh, const DH_METHOD *meth);
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DH *DH_new_method(ENGINE *engine);
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DH * DH_new(void);
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void DH_free(DH *dh);
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int DH_up_ref(DH *dh);
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int DH_size(const DH *dh);
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int DH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
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CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func);
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int DH_set_ex_data(DH *d, int idx, void *arg);
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void *DH_get_ex_data(DH *d, int idx);
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/* Deprecated version */
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#ifndef OPENSSL_NO_DEPRECATED
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DH * DH_generate_parameters(int prime_len,int generator,
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void (*callback)(int,int,void *),void *cb_arg);
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#endif /* !defined(OPENSSL_NO_DEPRECATED) */
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/* New version */
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int DH_generate_parameters_ex(DH *dh, int prime_len,int generator, BN_GENCB *cb);
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int DH_check(const DH *dh,int *codes);
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int DH_check_pub_key(const DH *dh,const BIGNUM *pub_key, int *codes);
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int DH_generate_key(DH *dh);
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int DH_compute_key(unsigned char *key,const BIGNUM *pub_key,DH *dh);
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DH * d2i_DHparams(DH **a,const unsigned char **pp, long length);
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int i2d_DHparams(const DH *a,unsigned char **pp);
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#ifndef OPENSSL_NO_FP_API
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int DHparams_print_fp(FILE *fp, const DH *x);
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#endif
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#ifndef OPENSSL_NO_BIO
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int DHparams_print(BIO *bp, const DH *x);
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#else
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int DHparams_print(char *bp, const DH *x);
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#endif
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/* BEGIN ERROR CODES */
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/* The following lines are auto generated by the script mkerr.pl. Any changes
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* made after this point may be overwritten when the script is next run.
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*/
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void ERR_load_DH_strings(void);
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/* Error codes for the DH functions. */
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/* Function codes. */
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#define DH_F_COMPUTE_KEY 102
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#define DH_F_DHPARAMS_PRINT 100
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#define DH_F_DHPARAMS_PRINT_FP 101
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#define DH_F_DH_BUILTIN_GENPARAMS 106
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#define DH_F_DH_NEW_METHOD 105
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#define DH_F_GENERATE_KEY 103
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#define DH_F_GENERATE_PARAMETERS 104
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/* Reason codes. */
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#define DH_R_BAD_GENERATOR 101
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#define DH_R_INVALID_PUBKEY 102
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#define DH_R_MODULUS_TOO_LARGE 103
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#define DH_R_NO_PRIVATE_VALUE 100
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#ifdef __cplusplus
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}
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#endif
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#endif
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