original_string: static function signString($string, $privateKeyFile, $privateKeyPassword = "") {
  
  		if (!function_exists("openssl_get_privatekey")) {
  			throw new CryptoException("OpenSSL extension in PHP is required. Please install or enable it.");
  		}
  
  		if (!file_exists($privateKeyFile) or !is_readable($privateKeyFile)) {
  			throw new CryptoException("Private key file \"$privateKeyFile\" not found or not readable.");
  		}
  
  		$keyAsString = file_get_contents($privateKeyFile);
  
  		$privateKeyId = openssl_get_privatekey($keyAsString, $privateKeyPassword);
  		if (!$privateKeyId) {
  			throw new CryptoException("Private key could not be loaded from file \"$privateKeyFile\". Please make sure that the file contains valid private key in PEM format.");
  		}
  
  		$ok = openssl_sign($string, $signature, $privateKeyId, self::HASH_METHOD);
  		if (!$ok) {
  			throw new CryptoException("Signing failed.");
  		}
  		$signature = base64_encode ($signature);
  		openssl_free_key ($privateKeyId);
  
  		return $signature;
  	}
code: static function signString($string, $privateKeyFile, $privateKeyPassword = "") {
  
  		if (!function_exists("openssl_get_privatekey")) {
  			throw new CryptoException("OpenSSL extension in PHP is required. Please install or enable it.");
  		}
  
  		if (!file_exists($privateKeyFile) or !is_readable($privateKeyFile)) {
  			throw new CryptoException("Private key file \"$privateKeyFile\" not found or not readable.");
  		}
  
  		$keyAsString = file_get_contents($privateKeyFile);
  
  		$privateKeyId = openssl_get_privatekey($keyAsString, $privateKeyPassword);
  		if (!$privateKeyId) {
  			throw new CryptoException("Private key could not be loaded from file \"$privateKeyFile\". Please make sure that the file contains valid private key in PEM format.");
  		}
  
  		$ok = openssl_sign($string, $signature, $privateKeyId, self::HASH_METHOD);
  		if (!$ok) {
  			throw new CryptoException("Signing failed.");
  		}
  		$signature = base64_encode ($signature);
  		openssl_free_key ($privateKeyId);
  
  		return $signature;
  	}
code_tokens: static function signString ( $ string , $ privateKeyFile , $ privateKeyPassword = "" ) { if ( ! function_exists ( "openssl_get_privatekey" ) ) { throw new CryptoException ( "OpenSSL extension in PHP is required. Please install or enable it." ) ; } if ( ! file_exists ( $ privateKeyFile ) or ! is_readable ( $ privateKeyFile ) ) { throw new CryptoException ( "Private key file \"$privateKeyFile\" not found or not readable." ) ; } $ keyAsString = file_get_contents ( $ privateKeyFile ) ; $ privateKeyId = openssl_get_privatekey ( $ keyAsString , $ privateKeyPassword ) ; if ( ! $ privateKeyId ) { throw new CryptoException ( "Private key could not be loaded from file \"$privateKeyFile\". Please make sure that the file contains valid private key in PEM format." ) ; } $ ok = openssl_sign ( $ string , $ signature , $ privateKeyId , self :: HASH_METHOD ) ; if ( ! $ ok ) { throw new CryptoException ( "Signing failed." ) ; } $ signature = base64_encode ( $ signature ) ; openssl_free_key ( $ privateKeyId ) ; return $ signature ; }
docstring: Signs a string
  
  @param string $string
  @param string $privateKeyFile Path to file with your private key (the .key file from https://iplatebnibrana.csob.cz/keygen/ )
  @param string $privateKeyPassword Password to the key, if it was generated with one. Leave empty if you created the key at https://iplatebnibrana.csob.cz/keygen/
  @return string Signature encoded with Base64
  @throws CryptoException When signing fails or key file path is not valid
docstring_tokens: Signs a string