/* vim: set expandtab ts=4 sw=4: */
/*
* You may redistribute this program and/or modify it under the terms of
* the GNU General Public License as published by the Free Software Foundation,
* either version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
#include "util/Bits.h"
#include "util/Endian.h"
#include "crypto/AddressCalc.h"
#include
#include
#include
/* These two constants are in big endian so they can be compared
* immediately with a uint8_t[] containing an address.
*/
#define ADDRESS_PREFIX_U64 (Endian_hostToBigEndian64( \
((uint64_t) AddressCalc_ADDRESS_PREFIX) << (64 - AddressCalc_ADDRESS_PREFIX_BITS)))
#define ADDRESS_PREFIX_MASK (Endian_hostToBigEndian64( \
UINT64_MAX << (64 - AddressCalc_ADDRESS_PREFIX_BITS)))
#include
bool AddressCalc_validAddress(const uint8_t address[16])
{
uint64_t significant_bits;
Bits_memcpy (&significant_bits, address, sizeof(uint64_t));
return (significant_bits & ADDRESS_PREFIX_MASK) == ADDRESS_PREFIX_U64;
}
void AddressCalc_makeValidAddress(uint8_t address[16])
{
uint64_t significant_bits;
Bits_memcpy (&significant_bits, address, sizeof(uint64_t));
significant_bits &= ~ADDRESS_PREFIX_MASK; // zero out the prefix
significant_bits |= ADDRESS_PREFIX_U64; // put the new prefix
Bits_memcpy (address, &significant_bits, sizeof(uint64_t));
}
bool AddressCalc_addressForPublicKey(uint8_t addressOut[16], const uint8_t key[32])
{
uint8_t hash[crypto_hash_sha512_BYTES];
crypto_hash_sha512(hash, key, 32);
crypto_hash_sha512(hash, hash, crypto_hash_sha512_BYTES);
if (addressOut) {
Bits_memcpy(addressOut, hash, 16);
}
return AddressCalc_validAddress(addressOut);
}