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<?php |
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declare(strict_types=1); |
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namespace BitWasp\Bitcoin\Crypto; |
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use BitWasp\Buffertools\Buffer; |
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use BitWasp\Buffertools\BufferInterface; |
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use lastguest\Murmur; |
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class Hash |
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{ |
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/** |
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* Calculate Sha256(RipeMd160()) on the given data |
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* |
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* @param BufferInterface $data |
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* @return BufferInterface |
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*/ |
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492 |
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public static function sha256ripe160(BufferInterface $data): BufferInterface |
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{ |
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return new Buffer(hash('ripemd160', hash('sha256', $data->getBinary(), true), true), 20); |
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} |
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/** |
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* Perform SHA256 |
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* |
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* @param BufferInterface $data |
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* @return BufferInterface |
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*/ |
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public static function sha256(BufferInterface $data): BufferInterface |
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{ |
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return new Buffer(hash('sha256', $data->getBinary(), true), 32); |
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} |
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/** |
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* Perform SHA256 twice |
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* |
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* @param BufferInterface $data |
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* @return BufferInterface |
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*/ |
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public static function sha256d(BufferInterface $data): BufferInterface |
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{ |
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return new Buffer(hash('sha256', hash('sha256', $data->getBinary(), true), true), 32); |
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} |
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/** |
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* RIPEMD160 |
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* |
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* @param BufferInterface $data |
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* @return BufferInterface |
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*/ |
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public static function ripemd160(BufferInterface $data): BufferInterface |
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{ |
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return new Buffer(hash('ripemd160', $data->getBinary(), true), 20); |
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} |
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/** |
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* RIPEMD160 twice |
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* |
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* @param BufferInterface $data |
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* @return BufferInterface |
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*/ |
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public static function ripemd160d(BufferInterface $data): BufferInterface |
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{ |
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return new Buffer(hash('ripemd160', hash('ripemd160', $data->getBinary(), true), true), 20); |
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} |
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/** |
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* Calculate a SHA1 hash |
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* |
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* @param BufferInterface $data |
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* @return BufferInterface |
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*/ |
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public static function sha1(BufferInterface $data): BufferInterface |
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{ |
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return new Buffer(hash('sha1', $data->getBinary(), true), 20); |
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} |
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/** |
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* PBKDF2 |
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* |
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* @param string $algorithm |
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* @param BufferInterface $password |
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* @param BufferInterface $salt |
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* @param integer $count |
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* @param integer $keyLength |
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* @return BufferInterface |
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* @throws \Exception |
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*/ |
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public static function pbkdf2(string $algorithm, BufferInterface $password, BufferInterface $salt, int $count, int $keyLength): BufferInterface |
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{ |
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if ($keyLength < 0) { |
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throw new \InvalidArgumentException('Cannot have a negative key-length for PBKDF2'); |
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} |
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$algorithm = strtolower($algorithm); |
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if (!in_array($algorithm, hash_algos(), true)) { |
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throw new \Exception('PBKDF2 ERROR: Invalid hash algorithm'); |
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} |
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if ($count <= 0 || $keyLength <= 0) { |
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throw new \Exception('PBKDF2 ERROR: Invalid parameters.'); |
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} |
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return new Buffer(\hash_pbkdf2($algorithm, $password->getBinary(), $salt->getBinary(), $count, $keyLength, true), $keyLength); |
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} |
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/** |
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* @param BufferInterface $data |
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* @param int $seed |
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* @return BufferInterface |
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*/ |
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public static function murmur3(BufferInterface $data, int $seed): BufferInterface |
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{ |
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return new Buffer(pack('N', Murmur::hash3_int($data->getBinary(), $seed)), 4); |
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} |
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/** |
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* Do HMAC hashing on $data and $salt |
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* |
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* @param string $algo |
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* @param BufferInterface $data |
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* @param BufferInterface $salt |
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* @return BufferInterface |
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*/ |
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public static function hmac(string $algo, BufferInterface $data, BufferInterface $salt): BufferInterface |
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{ |
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return new Buffer(hash_hmac($algo, $data->getBinary(), $salt->getBinary(), true)); |
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} |
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/** |
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* Creates a tagged sha256 hash per bip-schnorr |
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* |
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* @param string $tag |
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* @param BufferInterface $data |
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* @return BufferInterface |
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* @throws \Exception |
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*/ |
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public static function taggedSha256(string $tag, BufferInterface $data): BufferInterface |
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{ |
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$taghash = hash('sha256', $tag, true); |
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$ctx = hash_init('sha256'); |
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hash_update($ctx, $taghash); |
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hash_update($ctx, $taghash); |
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hash_update($ctx, $data->getBinary()); |
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return new Buffer(hash_final($ctx, true)); |
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} |
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} |
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Bit-Wasp /
bitcoin-php
