333 lines
14 KiB
C
333 lines
14 KiB
C
/* crypto/ecdsa/ecdsa.h */
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/**
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* \file crypto/ecdsa/ecdsa.h Include file for the OpenSSL ECDSA functions
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* \author Written by Nils Larsch for the OpenSSL project
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*/
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/* ====================================================================
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* Copyright (c) 2000-2005 The OpenSSL Project. All rights reserved.
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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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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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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
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#ifndef HEADER_ECDSA_H
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# define HEADER_ECDSA_H
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# include <openssl/opensslconf.h>
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# ifdef OPENSSL_NO_ECDSA
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# error ECDSA is disabled.
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# endif
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# include <openssl/ec.h>
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# include <openssl/ossl_typ.h>
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# ifdef OPENSSL_USE_DEPRECATED
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# include <openssl/bn.h>
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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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typedef struct ECDSA_SIG_st {
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BIGNUM *r;
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BIGNUM *s;
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} ECDSA_SIG;
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/** Allocates and initialize a ECDSA_SIG structure
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* \return pointer to a ECDSA_SIG structure or NULL if an error occurred
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*/
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ECDSA_SIG *ECDSA_SIG_new(void);
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/** frees a ECDSA_SIG structure
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* \param sig pointer to the ECDSA_SIG structure
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*/
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void ECDSA_SIG_free(ECDSA_SIG *sig);
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/** DER encode content of ECDSA_SIG object (note: this function modifies *pp
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* (*pp += length of the DER encoded signature)).
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* \param sig pointer to the ECDSA_SIG object
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* \param pp pointer to a unsigned char pointer for the output or NULL
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* \return the length of the DER encoded ECDSA_SIG object or 0
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*/
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int i2d_ECDSA_SIG(const ECDSA_SIG *sig, unsigned char **pp);
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/** Decodes a DER encoded ECDSA signature (note: this function changes *pp
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* (*pp += len)).
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* \param sig pointer to ECDSA_SIG pointer (may be NULL)
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* \param pp memory buffer with the DER encoded signature
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* \param len length of the buffer
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* \return pointer to the decoded ECDSA_SIG structure (or NULL)
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*/
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ECDSA_SIG *d2i_ECDSA_SIG(ECDSA_SIG **sig, const unsigned char **pp, long len);
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/** Computes the ECDSA signature of the given hash value using
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* the supplied private key and returns the created signature.
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* \param dgst pointer to the hash value
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* \param dgst_len length of the hash value
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* \param eckey EC_KEY object containing a private EC key
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* \return pointer to a ECDSA_SIG structure or NULL if an error occurred
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*/
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ECDSA_SIG *ECDSA_do_sign(const unsigned char *dgst, int dgst_len,
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EC_KEY *eckey);
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/** Computes ECDSA signature of a given hash value using the supplied
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* private key (note: sig must point to ECDSA_size(eckey) bytes of memory).
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* \param dgst pointer to the hash value to sign
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* \param dgstlen length of the hash value
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* \param kinv BIGNUM with a pre-computed inverse k (optional)
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* \param rp BIGNUM with a pre-computed rp value (optioanl),
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* see ECDSA_sign_setup
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* \param eckey EC_KEY object containing a private EC key
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* \return pointer to a ECDSA_SIG structure or NULL if an error occurred
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*/
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ECDSA_SIG *ECDSA_do_sign_ex(const unsigned char *dgst, int dgstlen,
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const BIGNUM *kinv, const BIGNUM *rp,
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EC_KEY *eckey);
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/** Verifies that the supplied signature is a valid ECDSA
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* signature of the supplied hash value using the supplied public key.
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* \param dgst pointer to the hash value
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* \param dgst_len length of the hash value
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* \param sig ECDSA_SIG structure
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* \param eckey EC_KEY object containing a public EC key
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* \return 1 if the signature is valid, 0 if the signature is invalid
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* and -1 on error
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*/
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int ECDSA_do_verify(const unsigned char *dgst, int dgst_len,
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const ECDSA_SIG *sig, EC_KEY *eckey);
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const ECDSA_METHOD *ECDSA_OpenSSL(void);
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/** Sets the default ECDSA method
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* \param meth new default ECDSA_METHOD
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*/
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void ECDSA_set_default_method(const ECDSA_METHOD *meth);
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/** Returns the default ECDSA method
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* \return pointer to ECDSA_METHOD structure containing the default method
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*/
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const ECDSA_METHOD *ECDSA_get_default_method(void);
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/** Sets method to be used for the ECDSA operations
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* \param eckey EC_KEY object
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* \param meth new method
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* \return 1 on success and 0 otherwise
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*/
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int ECDSA_set_method(EC_KEY *eckey, const ECDSA_METHOD *meth);
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/** Returns the maximum length of the DER encoded signature
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* \param eckey EC_KEY object
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* \return numbers of bytes required for the DER encoded signature
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*/
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int ECDSA_size(const EC_KEY *eckey);
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/** Precompute parts of the signing operation
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* \param eckey EC_KEY object containing a private EC key
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* \param ctx BN_CTX object (optional)
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* \param kinv BIGNUM pointer for the inverse of k
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* \param rp BIGNUM pointer for x coordinate of k * generator
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* \return 1 on success and 0 otherwise
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*/
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int ECDSA_sign_setup(EC_KEY *eckey, BN_CTX *ctx, BIGNUM **kinv, BIGNUM **rp);
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/** Computes ECDSA signature of a given hash value using the supplied
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* private key (note: sig must point to ECDSA_size(eckey) bytes of memory).
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* \param type this parameter is ignored
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* \param dgst pointer to the hash value to sign
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* \param dgstlen length of the hash value
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* \param sig memory for the DER encoded created signature
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* \param siglen pointer to the length of the returned signature
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* \param eckey EC_KEY object containing a private EC key
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* \return 1 on success and 0 otherwise
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*/
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int ECDSA_sign(int type, const unsigned char *dgst, int dgstlen,
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unsigned char *sig, unsigned int *siglen, EC_KEY *eckey);
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/** Computes ECDSA signature of a given hash value using the supplied
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* private key (note: sig must point to ECDSA_size(eckey) bytes of memory).
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* \param type this parameter is ignored
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* \param dgst pointer to the hash value to sign
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* \param dgstlen length of the hash value
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* \param sig buffer to hold the DER encoded signature
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* \param siglen pointer to the length of the returned signature
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* \param kinv BIGNUM with a pre-computed inverse k (optional)
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* \param rp BIGNUM with a pre-computed rp value (optioanl),
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* see ECDSA_sign_setup
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* \param eckey EC_KEY object containing a private EC key
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* \return 1 on success and 0 otherwise
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*/
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int ECDSA_sign_ex(int type, const unsigned char *dgst, int dgstlen,
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unsigned char *sig, unsigned int *siglen,
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const BIGNUM *kinv, const BIGNUM *rp, EC_KEY *eckey);
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/** Verifies that the given signature is valid ECDSA signature
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* of the supplied hash value using the specified public key.
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* \param type this parameter is ignored
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* \param dgst pointer to the hash value
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* \param dgstlen length of the hash value
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* \param sig pointer to the DER encoded signature
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* \param siglen length of the DER encoded signature
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* \param eckey EC_KEY object containing a public EC key
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* \return 1 if the signature is valid, 0 if the signature is invalid
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* and -1 on error
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*/
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int ECDSA_verify(int type, const unsigned char *dgst, int dgstlen,
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const unsigned char *sig, int siglen, EC_KEY *eckey);
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/* the standard ex_data functions */
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int ECDSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new
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*new_func, CRYPTO_EX_dup *dup_func,
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CRYPTO_EX_free *free_func);
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int ECDSA_set_ex_data(EC_KEY *d, int idx, void *arg);
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void *ECDSA_get_ex_data(EC_KEY *d, int idx);
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/** Allocates and initialize a ECDSA_METHOD structure
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* \param ecdsa_method pointer to ECDSA_METHOD to copy. (May be NULL)
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* \return pointer to a ECDSA_METHOD structure or NULL if an error occurred
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*/
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ECDSA_METHOD *ECDSA_METHOD_new(ECDSA_METHOD *ecdsa_method);
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/** frees a ECDSA_METHOD structure
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* \param ecdsa_method pointer to the ECDSA_METHOD structure
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*/
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void ECDSA_METHOD_free(ECDSA_METHOD *ecdsa_method);
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/** Sets application specific data in the ECDSA_METHOD
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* \param ecdsa_method pointer to existing ECDSA_METHOD
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* \param app application specific data to set
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*/
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void ECDSA_METHOD_set_app_data(ECDSA_METHOD *ecdsa_method, void *app);
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/** Returns application specific data from a ECDSA_METHOD structure
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* \param ecdsa_method pointer to ECDSA_METHOD structure
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* \return pointer to application specific data.
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*/
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void *ECDSA_METHOD_get_app_data(ECDSA_METHOD *ecdsa_method);
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/** Set the ECDSA_do_sign function in the ECDSA_METHOD
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* \param ecdsa_method pointer to existing ECDSA_METHOD
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* \param ecdsa_do_sign a funtion of type ECDSA_do_sign
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*/
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void ECDSA_METHOD_set_sign(ECDSA_METHOD *ecdsa_method,
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ECDSA_SIG *(*ecdsa_do_sign) (const unsigned char
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*dgst, int dgst_len,
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const BIGNUM *inv,
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const BIGNUM *rp,
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EC_KEY *eckey));
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/** Set the ECDSA_sign_setup function in the ECDSA_METHOD
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* \param ecdsa_method pointer to existing ECDSA_METHOD
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* \param ecdsa_sign_setup a funtion of type ECDSA_sign_setup
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*/
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void ECDSA_METHOD_set_sign_setup(ECDSA_METHOD *ecdsa_method,
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int (*ecdsa_sign_setup) (EC_KEY *eckey,
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BN_CTX *ctx,
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BIGNUM **kinv,
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BIGNUM **r));
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/** Set the ECDSA_do_verify function in the ECDSA_METHOD
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* \param ecdsa_method pointer to existing ECDSA_METHOD
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* \param ecdsa_do_verify a funtion of type ECDSA_do_verify
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*/
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void ECDSA_METHOD_set_verify(ECDSA_METHOD *ecdsa_method,
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int (*ecdsa_do_verify) (const unsigned char
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*dgst, int dgst_len,
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const ECDSA_SIG *sig,
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EC_KEY *eckey));
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void ECDSA_METHOD_set_flags(ECDSA_METHOD *ecdsa_method, int flags);
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/** Set the flags field in the ECDSA_METHOD
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* \param ecdsa_method pointer to existing ECDSA_METHOD
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* \param flags flags value to set
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*/
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void ECDSA_METHOD_set_name(ECDSA_METHOD *ecdsa_method, char *name);
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/** Set the name field in the ECDSA_METHOD
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* \param ecdsa_method pointer to existing ECDSA_METHOD
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* \param name name to set
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*/
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/* BEGIN ERROR CODES */
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/*
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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_ECDSA_strings(void);
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/* Error codes for the ECDSA functions. */
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/* Function codes. */
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# define ECDSA_F_ECDSA_DATA_NEW_METHOD 100
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# define ECDSA_F_ECDSA_DO_SIGN 101
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# define ECDSA_F_ECDSA_DO_VERIFY 102
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# define ECDSA_F_ECDSA_METHOD_NEW 105
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# define ECDSA_F_ECDSA_SIGN_SETUP 103
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/* Reason codes. */
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# define ECDSA_R_BAD_SIGNATURE 100
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# define ECDSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE 101
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# define ECDSA_R_ERR_EC_LIB 102
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# define ECDSA_R_MISSING_PARAMETERS 103
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# define ECDSA_R_NEED_NEW_SETUP_VALUES 106
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# define ECDSA_R_RANDOM_NUMBER_GENERATION_FAILED 104
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# define ECDSA_R_SIGNATURE_MALLOC_FAILED 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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