Signing and verification of PHP digital certificate

The signature and verification of a

Certificate are often used when docking interfaces with third parties, for identity verification and to prevent data tampering. The process of verifying the signature of a digital certificate in a PFX format and the public key of a CER format are sorted below.
Tips: PHP is required to open OpenSSL. Signature

    /** * Signature/public static function sign ($params, $keyPath, $pwd) {$params _str = Arrtoquery (
        $params, false);

        $params _sha1x16 = SHA1 ($params _str, false);
        $private _key = Self::getprivatekey ($keyPath, $pwd);

        $isSignSucceed = Openssl_sign ($params _sha1x16, $signature, $private _key);
            if ($isSignSucceed) {$signature _base64 = Base64_encode ($signature);
            $params [' signature '] = $signature _base64;
        Larequest (">>>>> signature success <<<<<<<");
        else {larequest (">>>>> signature failed <<<<<<<");
    return $params;
        The function arrtoquery ($arrayQuery, $urlEncode = True) {Ksort ($arrayQuery);
        $tmp = Array (); foreach ($arrayQuery as $k => $param) {$tmp [] = $k. '=' .
        ($urlEncode. UrlEncode ($param): $param);
        } $params = Implode (' & ', $tmp); return $pArams;
        The public static function Getprivatekey ($keyPath, $pwd) {$PKCS = file_get_contents ($keyPath);
        Openssl_pkcs12_read ($PKCS, $certs, $pwd);
    return $certs [' Pkey ']; }

Verification of the sign

public static function Verify ($params, $pubkeyPath)
    {
        $signature _str = $params [' signature '];
        $signature = Base64_decode ($signature _str);
        unset ($params [' signature ']);

        $public _key = file_get_contents ($pubkeyPath);
        $params _str = Arrtoquery ($params, false);
        $params _sha1x16 = SHA1 ($params _str, false);

        $isSuccess = openssl_verify ($params _sha1x16, $signature, $public _key);
        return $isSuccess;
    }

function Arrtoquery ($arrayQuery, $urlEncode = True)
{
    ksort ($arrayQuery);
    $tmp = Array ();
    foreach ($arrayQuery as $k => $param) {
        $tmp [] = $k. '=' . ($urlEncode. UrlEncode ($param): $param);
    }
    $params = Implode (' & ', $tmp);
    return $params;
}