/**
* @requires extension libsodium
*/
public function testStringCompare()
{
$this->assertTrue(Helpers::stringCompare('test', 'test'));
$this->assertFalse(Helpers::stringCompare('test', 'nottest'));
}
/**
* @param string $message
* @param string $signature
* @param string $signer_public
* @return bool
* @throws SignatureException
* @throws InvalidTypeException
*/
public static function verify($message, $signature, $signer_public)
{
# Test to make sure all the required variables are strings.
Helpers::isString($message, 'PublicKeyEncryption', 'verify');
Helpers::isString($signature, 'PublicKeyEncryption', 'verify');
Helpers::isString($signer_public, 'PublicKeyEncryption', 'verify');
# Decode the signature from hex
$signature = base64_decode(Helpers::hex2bin($signature));
# Decode the signer's public key from hex
$signer_public = Helpers::hex2bin($signer_public);
if (\Sodium\crypto_sign_verify_detached($signature, $message, $signer_public)) {
return true;
} else {
throw new SignatureException('Signature for message invalid.');
}
}
/**
* @depends testNonceSize
*/
public function testNonceFastForward()
{
$this->assertTrue(Helpers::nonceCheck(Helpers::hex2bin($this->nonceData['new']), Helpers::hex2bin($this->nonceData['old'])) === 'MSG_FAST_FORWARD');
}
/**
* Returns a random integer to the client.
*
* @param int $range Upper limit of random numbers to return to the client.
* @return int
* @throws Exceptions\InvalidTypeException
* @throws Exceptions\OutOfRangeException
*/
static function integer($range = Constants::RANGE)
{
# Test the length for validity.
Helpers::rangeCheck($range, Constants::RANGE_MAX, Constants::RANGE_MIN, 'Entropy', 'integer');
return \Sodium\randombytes_uniform($range) + 1;
}
