<?php

/**
 * PKCS#1 Formatted DSA Key Handler
 *
 * PHP version 5
 *
 * Used by File/X509.php
 *
 * Processes keys with the following headers:
 *
 * -----BEGIN DSA PRIVATE KEY-----
 * -----BEGIN DSA PUBLIC KEY-----
 * -----BEGIN DSA PARAMETERS-----
 *
 * Analogous to ssh-keygen's pem format (as specified by -m)
 *
 * Also, technically, PKCS1 decribes RSA but I am not aware of a formal specification for DSA.
 * The DSA private key format seems to have been adapted from the RSA private key format so
 * we're just re-using that as the name.
 *
 * @author    Jim Wigginton <terrafrost@php.net>
 * @copyright 2015 Jim Wigginton
 * @license   http://www.opensource.org/licenses/mit-license.html  MIT License
 * @link      http://phpseclib.sourceforge.net
 */

namespace phpseclib3\Crypt\DSA\Formats\Keys;

use phpseclib3\Common\Functions\Strings;
use phpseclib3\Crypt\Common\Formats\Keys\PKCS1 as Progenitor;
use phpseclib3\File\ASN1;
use phpseclib3\File\ASN1\Maps;
use phpseclib3\Math\BigInteger;

/**
 * PKCS#1 Formatted DSA Key Handler
 *
 * @author  Jim Wigginton <terrafrost@php.net>
 */
abstract class PKCS1 extends Progenitor
{
    /**
     * Break a public or private key down into its constituent components
     *
     * @param string $key
     * @param string $password optional
     * @return array
     */
    public static function load($key, $password = '')
    {
        $key = parent::load($key, $password);

        $decoded = ASN1::decodeBER($key);
        if (!$decoded) {
            throw new \RuntimeException('Unable to decode BER');
        }

        $key = ASN1::asn1map($decoded[0], Maps\DSAParams::MAP);
        if (is_array($key)) {
            return $key;
        }

        $key = ASN1::asn1map($decoded[0], Maps\DSAPrivateKey::MAP);
        if (is_array($key)) {
            return $key;
        }

        $key = ASN1::asn1map($decoded[0], Maps\DSAPublicKey::MAP);
        if (is_array($key)) {
            return $key;
        }

        throw new \RuntimeException('Unable to perform ASN1 mapping');
    }

    /**
     * Convert DSA parameters to the appropriate format
     *
     * @param \phpseclib3\Math\BigInteger $p
     * @param \phpseclib3\Math\BigInteger $q
     * @param \phpseclib3\Math\BigInteger $g
     * @return string
     */
    public static function saveParameters(BigInteger $p, BigInteger $q, BigInteger $g)
    {
        $key = [
            'p' => $p,
            'q' => $q,
            'g' => $g
        ];

        $key = ASN1::encodeDER($key, Maps\DSAParams::MAP);

        return "-----BEGIN DSA PARAMETERS-----\r\n" .
               chunk_split(Strings::base64_encode($key), 64) .
               "-----END DSA PARAMETERS-----\r\n";
    }

    /**
     * Convert a private key to the appropriate format.
     *
     * @param \phpseclib3\Math\BigInteger $p
     * @param \phpseclib3\Math\BigInteger $q
     * @param \phpseclib3\Math\BigInteger $g
     * @param \phpseclib3\Math\BigInteger $y
     * @param \phpseclib3\Math\BigInteger $x
     * @param string $password optional
     * @param array $options optional
     * @return string
     */
    public static function savePrivateKey(BigInteger $p, BigInteger $q, BigInteger $g, BigInteger $y, BigInteger $x, $password = '', array $options = [])
    {
        $key = [
            'version' => 0,
            'p' => $p,
            'q' => $q,
            'g' => $g,
            'y' => $y,
            'x' => $x
        ];

        $key = ASN1::encodeDER($key, Maps\DSAPrivateKey::MAP);

        return self::wrapPrivateKey($key, 'DSA', $password, $options);
    }

    /**
     * Convert a public key to the appropriate format
     *
     * @param \phpseclib3\Math\BigInteger $p
     * @param \phpseclib3\Math\BigInteger $q
     * @param \phpseclib3\Math\BigInteger $g
     * @param \phpseclib3\Math\BigInteger $y
     * @return string
     */
    public static function savePublicKey(BigInteger $p, BigInteger $q, BigInteger $g, BigInteger $y)
    {
        $key = ASN1::encodeDER($y, Maps\DSAPublicKey::MAP);

        return self::wrapPublicKey($key, 'DSA');
    }
}

• [F] OpenSSH.php
  Delete
• [F] PKCS1.php
  Delete
• [F] PKCS8.php
  Delete
• [F] PuTTY.php
  Delete
• [F] Raw.php
  Delete
• [F] XML.php
  Delete

Service Section

Our Services: Streamlining Your Payment Experience with Excellence

Discover how our services are designed to enhance your NFC Pay experience with convenience, security, and innovative solutions. From managing transactions to secure payments, we are dedicated to providing seamless support every step of the way.

Secure Card Storage

Easily save your credit and debit card details within our app for quick and secure transactions. This feature ensures that your payment information is protected with advanced encryption and can be used for future purchases with just a tap.

Effortless Money Transfers

Transfer funds quickly and securely between users with our streamlined money transfer service. Simply select the recipient, enter the amount, and authorize the transaction for instant, hassle-free transfers.

Merchant Account Setup

Activate your merchant account effortlessly to start receiving payments. Our intuitive setup process ensures that you can begin accepting transactions smoothly, helping your business thrive with minimal setup time.

Real-Time Transaction Tracking

Keep track of all your transactions in real time through our app. Monitor payment statuses, view transaction history, and manage your account efficiently, ensuring complete control over your financial activities.

Customer Support

Our dedicated support team is available to assist you with any queries or issues. Whether you need help with setting up your account or resolving transaction-related questions, we’re here to provide prompt and reliable assistance.