325 lines
11 KiB
C
325 lines
11 KiB
C
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/* crypto/dsa/dsa.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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/*
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* The DSS routines are based on patches supplied by
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* Steven Schoch <schoch@sheba.arc.nasa.gov>. He basically did the
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* work and I have just tweaked them a little to fit into my
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* stylistic vision for SSLeay :-) */
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#ifndef HEADER_DSA_H
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#define HEADER_DSA_H
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#include <openssl/e_os2.h>
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#ifdef OPENSSL_NO_DSA
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#error DSA 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/crypto.h>
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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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#ifndef OPENSSL_NO_DH
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# include <openssl/dh.h>
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#endif
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#endif
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#ifndef OPENSSL_DSA_MAX_MODULUS_BITS
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# define OPENSSL_DSA_MAX_MODULUS_BITS 10000
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#endif
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#define OPENSSL_DSA_FIPS_MIN_MODULUS_BITS 1024
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#define DSA_FLAG_CACHE_MONT_P 0x01
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#define DSA_FLAG_NO_EXP_CONSTTIME 0x02 /* new with 0.9.7h; the built-in DSA
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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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/* If this flag is set the DSA method is FIPS compliant and can be used
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* in FIPS mode. This is set in the validated module method. If an
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* application sets this flag in its own methods it is its reposibility
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* to ensure the result is compliant.
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*/
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#define DSA_FLAG_FIPS_METHOD 0x0400
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/* If this flag is set the operations normally disabled in FIPS mode are
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* permitted it is then the applications responsibility to ensure that the
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* usage is compliant.
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*/
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#define DSA_FLAG_NON_FIPS_ALLOW 0x0400
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#ifdef OPENSSL_FIPS
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#define FIPS_DSA_SIZE_T int
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#endif
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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 dsa_st DSA; */
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/* typedef struct dsa_method DSA_METHOD; */
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typedef struct DSA_SIG_st
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{
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BIGNUM *r;
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BIGNUM *s;
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} DSA_SIG;
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struct dsa_method
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{
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const char *name;
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DSA_SIG * (*dsa_do_sign)(const unsigned char *dgst, int dlen, DSA *dsa);
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int (*dsa_sign_setup)(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp,
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BIGNUM **rp);
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int (*dsa_do_verify)(const unsigned char *dgst, int dgst_len,
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DSA_SIG *sig, DSA *dsa);
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int (*dsa_mod_exp)(DSA *dsa, BIGNUM *rr, BIGNUM *a1, BIGNUM *p1,
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BIGNUM *a2, BIGNUM *p2, BIGNUM *m, BN_CTX *ctx,
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BN_MONT_CTX *in_mont);
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int (*bn_mod_exp)(DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p,
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const BIGNUM *m, BN_CTX *ctx,
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BN_MONT_CTX *m_ctx); /* Can be null */
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int (*init)(DSA *dsa);
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int (*finish)(DSA *dsa);
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int flags;
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char *app_data;
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/* If this is non-NULL, it is used to generate DSA parameters */
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int (*dsa_paramgen)(DSA *dsa, int bits,
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unsigned char *seed, int seed_len,
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int *counter_ret, unsigned long *h_ret,
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BN_GENCB *cb);
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/* If this is non-NULL, it is used to generate DSA keys */
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int (*dsa_keygen)(DSA *dsa);
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};
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struct dsa_st
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{
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/* This first variable is used to pick up errors where
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* a DSA is passed instead of of a EVP_PKEY */
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int pad;
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long version;
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int write_params;
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BIGNUM *p;
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BIGNUM *q; /* == 20 */
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BIGNUM *g;
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BIGNUM *pub_key; /* y public key */
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BIGNUM *priv_key; /* x private key */
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BIGNUM *kinv; /* Signing pre-calc */
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BIGNUM *r; /* Signing pre-calc */
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int flags;
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/* Normally used to cache montgomery values */
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BN_MONT_CTX *method_mont_p;
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int references;
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CRYPTO_EX_DATA ex_data;
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const DSA_METHOD *meth;
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/* functional reference if 'meth' is ENGINE-provided */
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ENGINE *engine;
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};
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#define DSAparams_dup(x) ASN1_dup_of_const(DSA,i2d_DSAparams,d2i_DSAparams,x)
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#define d2i_DSAparams_fp(fp,x) (DSA *)ASN1_d2i_fp((char *(*)())DSA_new, \
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(char *(*)())d2i_DSAparams,(fp),(unsigned char **)(x))
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#define i2d_DSAparams_fp(fp,x) ASN1_i2d_fp(i2d_DSAparams,(fp), \
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(unsigned char *)(x))
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#define d2i_DSAparams_bio(bp,x) ASN1_d2i_bio_of(DSA,DSA_new,d2i_DSAparams,bp,x)
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#define i2d_DSAparams_bio(bp,x) ASN1_i2d_bio_of_const(DSA,i2d_DSAparams,bp,x)
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DSA_SIG * DSA_SIG_new(void);
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void DSA_SIG_free(DSA_SIG *a);
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int i2d_DSA_SIG(const DSA_SIG *a, unsigned char **pp);
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DSA_SIG * d2i_DSA_SIG(DSA_SIG **v, const unsigned char **pp, long length);
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DSA_SIG * DSA_do_sign(const unsigned char *dgst,int dlen,DSA *dsa);
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int DSA_do_verify(const unsigned char *dgst,int dgst_len,
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DSA_SIG *sig,DSA *dsa);
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const DSA_METHOD *DSA_OpenSSL(void);
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void DSA_set_default_method(const DSA_METHOD *);
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const DSA_METHOD *DSA_get_default_method(void);
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int DSA_set_method(DSA *dsa, const DSA_METHOD *);
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#ifdef OPENSSL_FIPS
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DSA * FIPS_dsa_new(void);
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void FIPS_dsa_free (DSA *r);
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#endif
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DSA * DSA_new(void);
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DSA * DSA_new_method(ENGINE *engine);
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void DSA_free (DSA *r);
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/* "up" the DSA object's reference count */
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int DSA_up_ref(DSA *r);
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int DSA_size(const DSA *);
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/* next 4 return -1 on error */
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int DSA_sign_setup( DSA *dsa,BN_CTX *ctx_in,BIGNUM **kinvp,BIGNUM **rp);
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int DSA_sign(int type,const unsigned char *dgst,int dlen,
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unsigned char *sig, unsigned int *siglen, DSA *dsa);
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int DSA_verify(int type,const unsigned char *dgst,int dgst_len,
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const unsigned char *sigbuf, int siglen, DSA *dsa);
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int DSA_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 DSA_set_ex_data(DSA *d, int idx, void *arg);
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void *DSA_get_ex_data(DSA *d, int idx);
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DSA * d2i_DSAPublicKey(DSA **a, const unsigned char **pp, long length);
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DSA * d2i_DSAPrivateKey(DSA **a, const unsigned char **pp, long length);
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DSA * d2i_DSAparams(DSA **a, const unsigned char **pp, long length);
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/* Deprecated version */
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#ifndef OPENSSL_NO_DEPRECATED
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DSA * DSA_generate_parameters(int bits,
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unsigned char *seed,int seed_len,
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int *counter_ret, unsigned long *h_ret,void
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(*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 DSA_generate_parameters_ex(DSA *dsa, int bits,
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unsigned char *seed,int seed_len,
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int *counter_ret, unsigned long *h_ret, BN_GENCB *cb);
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int DSA_generate_key(DSA *a);
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int i2d_DSAPublicKey(const DSA *a, unsigned char **pp);
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int i2d_DSAPrivateKey(const DSA *a, unsigned char **pp);
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int i2d_DSAparams(const DSA *a,unsigned char **pp);
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#ifndef OPENSSL_NO_BIO
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int DSAparams_print(BIO *bp, const DSA *x);
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int DSA_print(BIO *bp, const DSA *x, int off);
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#endif
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#ifndef OPENSSL_NO_FP_API
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int DSAparams_print_fp(FILE *fp, const DSA *x);
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int DSA_print_fp(FILE *bp, const DSA *x, int off);
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#endif
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#define DSS_prime_checks 50
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/* Primality test according to FIPS PUB 186[-1], Appendix 2.1:
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* 50 rounds of Rabin-Miller */
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#define DSA_is_prime(n, callback, cb_arg) \
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BN_is_prime(n, DSS_prime_checks, callback, NULL, cb_arg)
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#ifndef OPENSSL_NO_DH
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/* Convert DSA structure (key or just parameters) into DH structure
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* (be careful to avoid small subgroup attacks when using this!) */
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DH *DSA_dup_DH(const DSA *r);
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#endif
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#ifdef OPENSSL_FIPS
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int FIPS_dsa_sig_encode(unsigned char *out, DSA_SIG *sig);
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int FIPS_dsa_sig_decode(DSA_SIG *sig, const unsigned char *in, int inlen);
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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_DSA_strings(void);
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/* Error codes for the DSA functions. */
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/* Function codes. */
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#define DSA_F_D2I_DSA_SIG 110
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#define DSA_F_DSAPARAMS_PRINT 100
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#define DSA_F_DSAPARAMS_PRINT_FP 101
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#define DSA_F_DSA_BUILTIN_KEYGEN 119
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#define DSA_F_DSA_BUILTIN_PARAMGEN 118
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#define DSA_F_DSA_DO_SIGN 112
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#define DSA_F_DSA_DO_VERIFY 113
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#define DSA_F_DSA_GENERATE_PARAMETERS 117
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#define DSA_F_DSA_NEW_METHOD 103
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#define DSA_F_DSA_PRINT 104
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#define DSA_F_DSA_PRINT_FP 105
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#define DSA_F_DSA_SET_DEFAULT_METHOD 115
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#define DSA_F_DSA_SET_METHOD 116
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#define DSA_F_DSA_SIGN 106
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#define DSA_F_DSA_SIGN_SETUP 107
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#define DSA_F_DSA_SIG_NEW 109
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#define DSA_F_DSA_VERIFY 108
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#define DSA_F_I2D_DSA_SIG 111
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#define DSA_F_SIG_CB 114
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/* Reason codes. */
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#define DSA_R_BAD_Q_VALUE 102
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#define DSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE 100
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#define DSA_R_KEY_SIZE_TOO_SMALL 106
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#define DSA_R_MISSING_PARAMETERS 101
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#define DSA_R_MODULUS_TOO_LARGE 103
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#define DSA_R_NON_FIPS_METHOD 104
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#define DSA_R_OPERATION_NOT_ALLOWED_IN_FIPS_MODE 105
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#ifdef __cplusplus
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}
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#endif
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#endif
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