/**
* @return Signature
*/
public function convert()
{
$sig_t = '';
/** @var resource $sig_t */
secp256k1_ecdsa_recoverable_signature_convert($this->ecAdapter->getContext(), $this->resource, $sig_t);
return new Signature($this->ecAdapter, $this->r, $this->s, $sig_t);
}
/**
* @param \BitWasp\Buffertools\BufferInterface|string $data
* @return PublicKey
*/
public function parse($data)
{
$buffer = (new Parser($data))->getBuffer();
$binary = $buffer->getBinary();
$pubkey_t = '';
/** @var resource $pubkey_t */
if (!secp256k1_ec_pubkey_parse($this->ecAdapter->getContext(), $binary, $pubkey_t)) {
throw new \RuntimeException('Secp256k1 failed to parse public key');
}
return new PublicKey($this->ecAdapter, $pubkey_t, $buffer->getSize() === 33);
}
/**
* @param $data
* @return SignatureInterface
*/
public function parse($data)
{
$buffer = (new Parser($data))->getBuffer();
$binary = $buffer->getBinary();
$sig_t = '';
/** @var resource $sig_t */
if (!secp256k1_ecdsa_signature_parse_der($this->ecAdapter->getContext(), $binary, $sig_t)) {
throw new \RuntimeException('Secp256k1: parse der failure');
}
// Unfortunately, we need to use the Parser here to get r and s :/
list(, $inner) = $this->getOuterTemplate()->parse(new Parser($buffer));
list(, $r, , $s) = $this->getInnerTemplate()->parse(new Parser($inner));
/** @var Buffer $r */
/** @var Buffer $s */
return new Signature($this->ecAdapter, $r->getInt(), $s->getInt(), $sig_t);
}
/**
* @param int $tweak
* @return PublicKey
* @throws \Exception
*/
public function tweakMul($tweak)
{
$context = $this->ecAdapter->getContext();
$math = $this->ecAdapter->getMath();
$bin = pack('H*', str_pad($math->decHex($tweak), 64, '0', STR_PAD_LEFT));
$clone = $this->clonePubkey();
if (1 !== secp256k1_ec_pubkey_tweak_mul($context, $clone, $bin)) {
throw new \RuntimeException('Secp256k1: tweak mul failed.');
}
return new PublicKey($this->ecAdapter, $clone, $this->compressed);
}
/**
* @return PublicKey
*/
public function getPublicKey()
{
if (null === $this->publicKey) {
$context = $this->ecAdapter->getContext();
$publicKey_t = '';
/** @var resource $publicKey_t */
if (1 !== secp256k1_ec_pubkey_create($context, $this->getBinary(), $publicKey_t)) {
throw new \RuntimeException('Failed to create public key');
}
$this->publicKey = new PublicKey($this->ecAdapter, $publicKey_t, $this->compressed);
}
return $this->publicKey;
}
/**
* @param string|BufferInterface $data
* @return CompactSignature
*/
public function parse($data)
{
$math = $this->ecAdapter->getMath();
$buffer = (new Parser($data, $math))->getBuffer();
if ($buffer->getSize() !== 65) {
throw new \RuntimeException('Compact Sig must be 65 bytes');
}
$byte = $buffer->slice(0, 1)->getInt();
$sig = $buffer->slice(1, 64);
$recoveryFlags = $math->sub($byte, 27);
if ($math->cmp($recoveryFlags, 7) > 0) {
throw new \RuntimeException('Invalid signature type');
}
$isCompressed = $math->cmp($math->bitwiseAnd($recoveryFlags, 4), 0) !== 0;
$recoveryId = $math->sub($recoveryFlags, $isCompressed ? 4 : 0);
$sig_t = '';
/** @var resource $sig_t */
if (!secp256k1_ecdsa_recoverable_signature_parse_compact($this->ecAdapter->getContext(), $sig->getBinary(), $recoveryId, $sig_t)) {
throw new \RuntimeException('Unable to parse compact signature');
}
return new CompactSignature($this->ecAdapter, $sig_t, $recoveryId, $isCompressed);
}