/**
* @param GeneratorPoint $G
* @param $hash
* @return int|string
*/
public function truncateHash(GeneratorPoint $G, $hash)
{
$hexSize = strlen($this->adapter->decHex($hash));
$hashBits = $this->adapter->baseConvert($hash, 10, 2);
if (strlen($hashBits) < $hexSize * 4) {
$hashBits = str_pad($hashBits, $hexSize * 4, '0', STR_PAD_LEFT);
}
$messageHash = $this->adapter->baseConvert(substr($hashBits, 0, NumberSize::bnNumBits($this->adapter, $G->getOrder())), 2, 10);
return $messageHash;
}
/**
* Returns the number of bits used to store this number. Non-singicant upper bits are not counted.
*
* @param MathAdapterInterface $adapter
* @param int|string $x
* @return number
*
* @link https://www.openssl.org/docs/crypto/BN_num_bytes.html
*/
public static function bnNumBits(MathAdapterInterface $adapter, $x)
{
if ($adapter->cmp($x, '0') == 0) {
return 0;
}
$log2 = 0;
while ($x = $adapter->rightShift($x, 1)) {
$log2++;
}
return $log2 + 1;
}
/**
* @param MathAdapterInterface $math
* @param NamedCurveFp $c
* @return Sequence
*/
private function getCurveAsn(MathAdapterInterface $math, NamedCurveFp $c)
{
$a = new OctetString($math->decHex($math->mod($c->getA(), $c->getPrime())));
$b = new OctetString($math->decHex($math->mod($c->getB(), $c->getPrime())));
try {
$seed = CurveRandomSeed::getSeed($c);
return new Sequence($a, $b, new BitString($seed));
} catch (\Exception $e) {
return new Sequence($a, $b);
}
}
/**
* @param CurveFpInterface $curve
* @param string $data
* @return PointInterface
*/
public function unserialize(CurveFpInterface $curve, $data)
{
if (substr($data, 0, 2) != '04') {
throw new \InvalidArgumentException('Invalid data: only uncompressed keys are supported.');
}
$data = substr($data, 2);
$dataLength = strlen($data);
$x = $this->adapter->hexDec(substr($data, 0, $dataLength / 2));
$y = $this->adapter->hexDec(substr($data, $dataLength / 2));
return $curve->getPoint($x, $y);
}
/**
* Parse $bytes bytes from the string, and return the obtained buffer
*
* @param integer $bytes
* @param bool $flipBytes
* @return Buffer
* @throws \Exception
*/
public function readBytes($bytes, $flipBytes = false)
{
$string = substr($this->string, $this->getPosition(), $bytes);
$length = strlen($string);
if ($length == 0) {
throw new ParserOutOfRange('Could not parse string of required length (empty)');
} elseif ($this->math->cmp($length, $bytes) !== 0) {
throw new ParserOutOfRange('Could not parse string of required length (too short)');
}
$this->position += $bytes;
if ($flipBytes) {
$string = Buffertools::flipBytes($string);
}
return new Buffer($string, $length, $this->math);
}
/**
* {@inheritDoc}
* @see \Mdanter\Ecc\PointInterface::__toString()
*/
public function __toString()
{
if ($this->infinity) {
return '[ (infinity) on ' . (string) $this->curve . ' ]';
}
return "[ (" . $this->adapter->toString($this->x) . "," . $this->adapter->toString($this->y) . ') on ' . (string) $this->curve . ' ]';
}
/**
* @param string $data
* {@inheritDoc}
* @see \Mdanter\Ecc\Serializer\PrivateKeySerializerInterface::parse()
* @throws \FG\ASN1\Exception\ParserException
*/
public function parse($data)
{
$asnObject = Object::fromBinary($data);
if (!$asnObject instanceof Sequence || $asnObject->getNumberofChildren() !== 4) {
throw new \RuntimeException('Invalid data.');
}
$children = $asnObject->getChildren();
$version = $children[0];
if ($version->getContent() != 1) {
throw new \RuntimeException('Invalid data: only version 1 (RFC5915) keys are supported.');
}
$key = $this->adapter->hexDec($children[1]->getContent());
$oid = $children[2]->getContent();
$generator = CurveOidMapper::getGeneratorFromOid($oid);
return $generator->getPrivateKeyFrom($key);
}
/**
* @dataProvider getDeterministicSign2Data
*/
public function testDeterministicSign2($curve, $size, $algo, $privKey, $message, $eK, $eR, $eS)
{
//echo "Try {$test->curve} / {$test->algorithm} / '{$test->message}'\n";
$G = CurveFactory::getGeneratorByName($curve);
// Initialize private key and message hash (decimal)
$privateKey = $G->getPrivateKeyFrom($this->math->hexDec($privKey));
$hashHex = hash($algo, $message);
$messageHash = $this->math->hexDec($hashHex);
// Derive K
$drbg = RandomGeneratorFactory::getHmacRandomGenerator($privateKey, $messageHash, $algo);
$k = $drbg->generate($G->getOrder());
$this->assertEquals($this->math->hexdec($eK), $k, 'k');
$hexSize = strlen($hashHex);
$hashBits = $this->math->baseConvert($messageHash, 10, 2);
if (strlen($hashBits) < $hexSize * 4) {
$hashBits = str_pad($hashBits, $hexSize * 4, '0', STR_PAD_LEFT);
}
$messageHash = $this->math->baseConvert(substr($hashBits, 0, $size), 2, 10);
$signer = new Signer($this->math);
$sig = $signer->sign($privateKey, $messageHash, $k);
// R and S should be correct
$sR = $this->math->hexDec($eR);
$sS = $this->math->hexDec($eS);
$this->assertTrue($signer->verify($privateKey->getPublicKey(), $sig, $messageHash));
$this->assertSame($sR, $sig->getR(), 'r');
$this->assertSame($sS, $sig->getS(), 's');
}
/**
* Initialize a new instance.
*
* @param MathAdapterInterface $adapter
* @param GeneratorPoint $generator
* @param PointInterface $point
* @throws \LogicException
* @throws \RuntimeException
*/
public function __construct(MathAdapterInterface $adapter, GeneratorPoint $generator, PointInterface $point)
{
$this->curve = $generator->getCurve();
$this->generator = $generator;
$this->point = $point;
$this->adapter = $adapter;
$n = $generator->getOrder();
if ($n == null) {
throw new \LogicException("Generator must have order.");
}
if (!$point->mul($n)->isInfinity()) {
throw new \RuntimeException("Generator point order is bad.");
}
if ($adapter->cmp($point->getX(), 0) < 0 || $adapter->cmp($n, $point->getX()) <= 0 || $adapter->cmp($point->getY(), 0) < 0 || $adapter->cmp($n, $point->getY()) <= 0) {
throw new \RuntimeException("Generator point has x and y out of range.");
}
}
/**
* @test
*
* @uses Lcobucci\JWT\Signer\Ecdsa::__construct
* @uses Lcobucci\JWT\Signer\Key
*
* @covers Lcobucci\JWT\Signer\Ecdsa::doVerify
* @covers Lcobucci\JWT\Signer\Ecdsa::createSigningHash
* @covers Lcobucci\JWT\Signer\Ecdsa::extractSignature
*/
public function doVerifyShouldDelegateToEcdsaSignerUsingPublicKey()
{
$signer = $this->getSigner();
$key = new Key('testing');
$publicKey = $this->getMock(PublicKeyInterface::class);
$this->parser->expects($this->once())->method('getPublicKey')->with($key)->willReturn($publicKey);
$this->adapter->expects($this->exactly(3))->method('hexDec')->willReturn('123');
$this->signer->expects($this->once())->method('verify')->with($publicKey, $this->isInstanceOf(Signature::class), $this->isType('string'))->willReturn(true);
$this->assertTrue($signer->doVerify('testing', 'testing2', $key));
}
/**
* {@inheritDoc}
* @see \Mdanter\Ecc\EcMathInterface::cmp()
*/
public function cmp($input)
{
$type = $this->identify($input);
if ($this->dataType == 'point' && $type == 'point') {
return $this->data->cmp($input);
}
if ($this->dataType == 'int' && $type == 'int') {
return $this->math->cmp($this->data, $input);
}
throw new \LogicException('Cannot compare values of different types');
}
/**
* @dataProvider getB24Params
* @testdox Test 192-bit generated curve points against ECDSAVS section B2.4 samples
*/
public function testP192CurveEcdsavsB24SignatureValidityTest(MathAdapterInterface $math, $msg, $Qx, $Qy, $R, $S, $expected)
{
$msg = $math->hexDec($msg);
$Qx = $math->hexDec($Qx);
$Qy = $math->hexDec($Qy);
$R = $math->hexDec($R);
$S = $math->hexDec($S);
$generator = EccFactory::getNistCurves($math)->generator192();
$publicKey = $generator->getPublicKeyFrom($Qx, $Qy);
$signer = new Signer($math);
$actual = $signer->verify($publicKey, new Signature($R, $S), $math->digestInteger($msg));
$this->assertEquals($expected, $actual);
}
/**
* Extracts R and S values from given data
*
* @param string $value
*
* @return \Mdanter\Ecc\Crypto\Signature\Signature
*/
private function extractSignature($value)
{
$length = $this->getSignatureLength();
$value = unpack('H*', $value)[1];
return new Signature($this->adapter->hexDec(substr($value, 0, $length)), $this->adapter->hexDec(substr($value, $length)));
}
/**
* @param bool $hex
* @return int|string
*/
public function getHash($hex = false)
{
$hash = hash($this->algo, $this->content, false);
return $hex ? $hash : $this->adapter->hexDec($hash);
}
/**
* @return int|string
*/
public function getInt()
{
return $this->math->hexDec($this->getHex());
}
/**
* @dataProvider getAdapters
*/
public function testModFunction(MathAdapterInterface $math)
{
// $o->compressed, $o->decompressed public key.
// Check that we can compress a key properly (tests $math->mod())
foreach ($this->compression_data as $o) {
$prefix = substr($o->decompressed, 0, 2);
// will be 04.
$this->assertEquals('04', $prefix);
// hex encoded (X,Y) coordinate of ECDSA public key.
$x = substr($o->decompressed, 2, 64);
$y = substr($o->decompressed, 66, 64);
// y % 2 == 0 - true: y is even(02) / false: y is odd(03)
$mod = $math->mod($math->hexDec($y), 2);
$compressed = '0' . ($mod == 0 ? '2' : '3') . $x;
// Check that the mod function reported the parity for the y value.
$this->assertTrue($compressed === $o->compressed);
}
}
/**
* Hash the data, returning a decimal.
*
* @param $string - a binary string to hash
* @return int|string
*/
public function hashDec($string)
{
$hex = $this->hash($string, false);
return $this->math->hexDec($hex);
}
/**
* @dataProvider getIntegers
*/
public function testDigestInteger(MathAdapterInterface $math, $integer, $result)
{
$this->assertEquals($result, $math->digestInteger($integer));
}
/**
*
* @dataProvider getMultAdapters
*/
public function testMultiply2(MathAdapterInterface $math, $p, $a, $b, $x, $y, $m, $ex, $ey)
{
$c = new CurveFp($p, $a, $b, $math);
$p1 = $c->getPoint($x, $y);
$p3 = $p1->mul($m);
$this->assertFalse($p3->isInfinity());
$this->assertEquals($ex, $math->mod($p3->getX(), $p));
$this->assertEquals($ey, $math->mod($p3->getY(), $p));
}
/**
* {@inheritDoc}
* @see \Mdanter\Ecc\MathAdapter::toString()
*/
public function toString($value)
{
return $this->adapter->toString($value);
}
/**
* @param $value
*
* @return int|string
*/
private function convertHexToDec($value)
{
return $this->adapter->hexDec($value);
}
/**
* @param $integer
* @param $bitSize
* @return int|string
*/
public function getTwosComplement($integer, $bitSize)
{
return $this->math->add($this->math->pow(2, $bitSize), $integer);
}
/**
* Extracts R and S values from given data
*
* @param string $value
*
* @return \Mdanter\Ecc\Crypto\Signature\Signature
*/
private function extractSignature(string $value) : \Mdanter\Ecc\Crypto\Signature\Signature
{
$length = $this->getSignatureLength();
$value = unpack('H*', $value)[1];
return new Signature($this->adapter->hexDec(substr($value, 0, $length)), $this->adapter->hexDec(substr($value, $length)));
}
/**
* @param int|string $max
* @return int|string
*/
public function generate($max)
{
$bytes = NumberSize::getFlooredByteSize($this->adapter, $max);
$iv = mcrypt_create_iv($bytes, \MCRYPT_DEV_URANDOM);
return $this->adapter->hexDec(bin2hex($iv));
}
