/* 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); }