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ecdsa.h
/* crypto/ecdsa/ecdsa.h */ /** * \file crypto/ecdsa/ecdsa.h Include file for the OpenSSL ECDSA functions * \author Written by Nils Larsch for the OpenSSL project */ /* ==================================================================== * Copyright (c) 2000-2005 The OpenSSL Project. All rights reserved. * * 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 above 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 acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to * endorse or promote products derived from this software without * prior written permission. For written permission, please contact * licensing@OpenSSL.org. * * 5. Products derived from this software may not be called "OpenSSL" * nor may "OpenSSL" appear in their names without prior written * permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY * EXPRESSED 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 OpenSSL PROJECT OR * ITS 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. * ==================================================================== * * This product includes cryptographic software written by Eric Young * (eay@cryptsoft.com). This product includes software written by Tim * Hudson (tjh@cryptsoft.com). * */ #ifndef HEADER_ECDSA_H # define HEADER_ECDSA_H # include <openssl/opensslconf.h> # ifdef OPENSSL_NO_ECDSA # error ECDSA is disabled. # endif # include <openssl/ec.h> # include <openssl/ossl_typ.h> # ifndef OPENSSL_NO_DEPRECATED # include <openssl/bn.h> # endif #ifdef __cplusplus extern "C" { #endif typedef struct ECDSA_SIG_st { BIGNUM *r; BIGNUM *s; } ECDSA_SIG; /** Allocates and initialize a ECDSA_SIG structure * \return pointer to a ECDSA_SIG structure or NULL if an error occurred */ ECDSA_SIG *ECDSA_SIG_new(void); /** frees a ECDSA_SIG structure * \param sig pointer to the ECDSA_SIG structure */ void ECDSA_SIG_free(ECDSA_SIG *sig); /** DER encode content of ECDSA_SIG object (note: this function modifies *pp * (*pp += length of the DER encoded signature)). * \param sig pointer to the ECDSA_SIG object * \param pp pointer to a unsigned char pointer for the output or NULL * \return the length of the DER encoded ECDSA_SIG object or 0 */ int i2d_ECDSA_SIG(const ECDSA_SIG *sig, unsigned char **pp); /** Decodes a DER encoded ECDSA signature (note: this function changes *pp * (*pp += len)). * \param sig pointer to ECDSA_SIG pointer (may be NULL) * \param pp memory buffer with the DER encoded signature * \param len length of the buffer * \return pointer to the decoded ECDSA_SIG structure (or NULL) */ ECDSA_SIG *d2i_ECDSA_SIG(ECDSA_SIG **sig, const unsigned char **pp, long len); /** Computes the ECDSA signature of the given hash value using * the supplied private key and returns the created signature. * \param dgst pointer to the hash value * \param dgst_len length of the hash value * \param eckey EC_KEY object containing a private EC key * \return pointer to a ECDSA_SIG structure or NULL if an error occurred */ ECDSA_SIG *ECDSA_do_sign(const unsigned char *dgst, int dgst_len, EC_KEY *eckey); /** Computes ECDSA signature of a given hash value using the supplied * private key (note: sig must point to ECDSA_size(eckey) bytes of memory). * \param dgst pointer to the hash value to sign * \param dgstlen length of the hash value * \param kinv BIGNUM with a pre-computed inverse k (optional) * \param rp BIGNUM with a pre-computed rp value (optioanl), * see ECDSA_sign_setup * \param eckey EC_KEY object containing a private EC key * \return pointer to a ECDSA_SIG structure or NULL if an error occurred */ ECDSA_SIG *ECDSA_do_sign_ex(const unsigned char *dgst, int dgstlen, const BIGNUM *kinv, const BIGNUM *rp, EC_KEY *eckey); /** Verifies that the supplied signature is a valid ECDSA * signature of the supplied hash value using the supplied public key. * \param dgst pointer to the hash value * \param dgst_len length of the hash value * \param sig ECDSA_SIG structure * \param eckey EC_KEY object containing a public EC key * \return 1 if the signature is valid, 0 if the signature is invalid * and -1 on error */ int ECDSA_do_verify(const unsigned char *dgst, int dgst_len, const ECDSA_SIG *sig, EC_KEY *eckey); const ECDSA_METHOD *ECDSA_OpenSSL(void); /** Sets the default ECDSA method * \param meth new default ECDSA_METHOD */ void ECDSA_set_default_method(const ECDSA_METHOD *meth); /** Returns the default ECDSA method * \return pointer to ECDSA_METHOD structure containing the default method */ const ECDSA_METHOD *ECDSA_get_default_method(void); /** Sets method to be used for the ECDSA operations * \param eckey EC_KEY object * \param meth new method * \return 1 on success and 0 otherwise */ int ECDSA_set_method(EC_KEY *eckey, const ECDSA_METHOD *meth); /** Returns the maximum length of the DER encoded signature * \param eckey EC_KEY object * \return numbers of bytes required for the DER encoded signature */ int ECDSA_size(const EC_KEY *eckey); /** Precompute parts of the signing operation * \param eckey EC_KEY object containing a private EC key * \param ctx BN_CTX object (optional) * \param kinv BIGNUM pointer for the inverse of k * \param rp BIGNUM pointer for x coordinate of k * generator * \return 1 on success and 0 otherwise */ int ECDSA_sign_setup(EC_KEY *eckey, BN_CTX *ctx, BIGNUM **kinv, BIGNUM **rp); /** Computes ECDSA signature of a given hash value using the supplied * private key (note: sig must point to ECDSA_size(eckey) bytes of memory). * \param type this parameter is ignored * \param dgst pointer to the hash value to sign * \param dgstlen length of the hash value * \param sig memory for the DER encoded created signature * \param siglen pointer to the length of the returned signature * \param eckey EC_KEY object containing a private EC key * \return 1 on success and 0 otherwise */ int ECDSA_sign(int type, const unsigned char *dgst, int dgstlen, unsigned char *sig, unsigned int *siglen, EC_KEY *eckey); /** Computes ECDSA signature of a given hash value using the supplied * private key (note: sig must point to ECDSA_size(eckey) bytes of memory). * \param type this parameter is ignored * \param dgst pointer to the hash value to sign * \param dgstlen length of the hash value * \param sig buffer to hold the DER encoded signature * \param siglen pointer to the length of the returned signature * \param kinv BIGNUM with a pre-computed inverse k (optional) * \param rp BIGNUM with a pre-computed rp value (optioanl), * see ECDSA_sign_setup * \param eckey EC_KEY object containing a private EC key * \return 1 on success and 0 otherwise */ int ECDSA_sign_ex(int type, const unsigned char *dgst, int dgstlen, unsigned char *sig, unsigned int *siglen, const BIGNUM *kinv, const BIGNUM *rp, EC_KEY *eckey); /** Verifies that the given signature is valid ECDSA signature * of the supplied hash value using the specified public key. * \param type this parameter is ignored * \param dgst pointer to the hash value * \param dgstlen length of the hash value * \param sig pointer to the DER encoded signature * \param siglen length of the DER encoded signature * \param eckey EC_KEY object containing a public EC key * \return 1 if the signature is valid, 0 if the signature is invalid * and -1 on error */ int ECDSA_verify(int type, const unsigned char *dgst, int dgstlen, const unsigned char *sig, int siglen, EC_KEY *eckey); /* the standard ex_data functions */ int ECDSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func); int ECDSA_set_ex_data(EC_KEY *d, int idx, void *arg); void *ECDSA_get_ex_data(EC_KEY *d, int idx); /** Allocates and initialize a ECDSA_METHOD structure * \param ecdsa_method pointer to ECDSA_METHOD to copy. (May be NULL) * \return pointer to a ECDSA_METHOD structure or NULL if an error occurred */ ECDSA_METHOD *ECDSA_METHOD_new(const ECDSA_METHOD *ecdsa_method); /** frees a ECDSA_METHOD structure * \param ecdsa_method pointer to the ECDSA_METHOD structure */ void ECDSA_METHOD_free(ECDSA_METHOD *ecdsa_method); /** Sets application specific data in the ECDSA_METHOD * \param ecdsa_method pointer to existing ECDSA_METHOD * \param app application specific data to set */ void ECDSA_METHOD_set_app_data(ECDSA_METHOD *ecdsa_method, void *app); /** Returns application specific data from a ECDSA_METHOD structure * \param ecdsa_method pointer to ECDSA_METHOD structure * \return pointer to application specific data. */ void *ECDSA_METHOD_get_app_data(ECDSA_METHOD *ecdsa_method); /** Set the ECDSA_do_sign function in the ECDSA_METHOD * \param ecdsa_method pointer to existing ECDSA_METHOD * \param ecdsa_do_sign a funtion of type ECDSA_do_sign */ void ECDSA_METHOD_set_sign(ECDSA_METHOD *ecdsa_method, ECDSA_SIG *(*ecdsa_do_sign) (const unsigned char *dgst, int dgst_len, const BIGNUM *inv, const BIGNUM *rp, EC_KEY *eckey)); /** Set the ECDSA_sign_setup function in the ECDSA_METHOD * \param ecdsa_method pointer to existing ECDSA_METHOD * \param ecdsa_sign_setup a funtion of type ECDSA_sign_setup */ void ECDSA_METHOD_set_sign_setup(ECDSA_METHOD *ecdsa_method, int (*ecdsa_sign_setup) (EC_KEY *eckey, BN_CTX *ctx, BIGNUM **kinv, BIGNUM **r)); /** Set the ECDSA_do_verify function in the ECDSA_METHOD * \param ecdsa_method pointer to existing ECDSA_METHOD * \param ecdsa_do_verify a funtion of type ECDSA_do_verify */ void ECDSA_METHOD_set_verify(ECDSA_METHOD *ecdsa_method, int (*ecdsa_do_verify) (const unsigned char *dgst, int dgst_len, const ECDSA_SIG *sig, EC_KEY *eckey)); void ECDSA_METHOD_set_flags(ECDSA_METHOD *ecdsa_method, int flags); /** Set the flags field in the ECDSA_METHOD * \param ecdsa_method pointer to existing ECDSA_METHOD * \param flags flags value to set */ void ECDSA_METHOD_set_name(ECDSA_METHOD *ecdsa_method, char *name); /** Set the name field in the ECDSA_METHOD * \param ecdsa_method pointer to existing ECDSA_METHOD * \param name name to set */ /* 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_ECDSA_strings(void); /* Error codes for the ECDSA functions. */ /* Function codes. */ # define ECDSA_F_ECDSA_CHECK 104 # define ECDSA_F_ECDSA_DATA_NEW_METHOD 100 # define ECDSA_F_ECDSA_DO_SIGN 101 # define ECDSA_F_ECDSA_DO_VERIFY 102 # define ECDSA_F_ECDSA_METHOD_NEW 105 # define ECDSA_F_ECDSA_SIGN_SETUP 103 /* Reason codes. */ # define ECDSA_R_BAD_SIGNATURE 100 # define ECDSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE 101 # define ECDSA_R_ERR_EC_LIB 102 # define ECDSA_R_MISSING_PARAMETERS 103 # define ECDSA_R_NEED_NEW_SETUP_VALUES 106 # define ECDSA_R_NON_FIPS_METHOD 107 # define ECDSA_R_RANDOM_NUMBER_GENERATION_FAILED 104 # define ECDSA_R_SIGNATURE_MALLOC_FAILED 105 #ifdef __cplusplus } #endif #endif
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