version3/cpp/bls.h

/*
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regarding copyright ownership.  The ASF licenses this file
to you under the Apache License, Version 2.0 (the
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with the License.  You may obtain a copy of the License at

  http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing,
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*/

/**
 * @file bls.h
 * @author Mike Scott
 * @date 28th Novemebr 2018
 * @brief BLS Header file
 *
 * Allows some user configuration
 * defines structures
 * declares functions
 *
 */

#ifndef BLS_ZZZ_H
#define BLS_ZZZ_H

#include "pair_ZZZ.h"

using namespace amcl;

namespace ZZZ {

/* Field size is assumed to be greater than or equal to group size */

#define BGS_ZZZ MODBYTES_XXX  /**< BLS Group Size */
#define BFS_ZZZ MODBYTES_XXX  /**< BLS Field Size */

#define BLS_OK           0  /**< Function completed without error */
#define BLS_FAIL		-1	/**< Point is NOT on the curve */

/* BLS API functions */

/**	@brief Generate Key Pair
 *
	@param RNG is a pointer to a cryptographically secure random number generator
	@param S on output a private key
	@param V on output a private key = S*G, where G is fixed generator
	@return BLS_OK
 */
int BLS_KEY_PAIR_GENERATE(csprng *RNG,octet* S,octet *W);

/**	@brief Calculate a signature
 *
	@param SIG the ouput signature
	@param m is the message to be signed
	@param S an input private key
	@return BLS_OK
 */
int BLS_SIGN(octet *SIG,char *m,octet *S);

/**	@brief Verify a signature
 *
	@param SIG an input signature
	@param m is the message whose signature is to be verified.
	@param W an public key
	@return BLS_OK if verified, otherwise BLS_FAIL
 */
int BLS_VERIFY(octet *SIG,char *m,octet *W);
}

#endif