php - openpgp-php 无法解密来自其他客户端的密文

Question

请参阅下面的源代码以重现此问题。步骤 1 使用gnupg加密消息，而步骤 2 使用openpgp-php解密来自步骤 1 的消息。要执行代码，请确保您安装了 PHP gnupg 和 openpgp-php。（参见singpolyma / openpgp-php）获取 openpgp-php 文档。

我想要实现的目标是 我有一个后端服务器和一个只能通过电子邮件进行通信的移动应用程序。为简单起见，假设步骤 1 是后端服务器，步骤 2 是移动客户端。消息在服务器和客户端之间来回流动。后端服务器应该能够加密用于移动应用程序的消息，该消息作为回报解密消息并向后端发送加密回复。

 <?php
    @include_once dirname(__FILE__).'/vendor/autoload.php';
    require_once dirname(__FILE__).'/lib/openpgp.php';
    require_once dirname(__FILE__).'/lib/openpgp_crypt_rsa.php';
    require_once dirname(__FILE__).'/lib/openpgp_crypt_symmetric.php';
    
    
    /**
     * Note: Step 1 and step 2 represents a client-server setup
     * I know it's wrong to share private keys but this was generated specifically for this test
     */
    
    /**
     * step #1 (Encryption)
     * encrypt message meant for [e-mail] at step #2 
     */
    
    // public key for [e-mail]
    $public_key1 = "-----BEGIN PGP PUBLIC KEY BLOCK-----
    
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    pko=
    =vTCt
    -----END PGP PUBLIC KEY BLOCK-----
    ";
    
    // private key for [e-mail]
    $private_key1 = "-----BEGIN PGP PRIVATE KEY BLOCK-----
    
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    hVub9BQ=
    =+jZf
    -----END PGP PRIVATE KEY BLOCK-----
    ";
    
    $message = "Testing again and again";
    $gpg = new gnupg();
    $publicKey = $gpg->import($public_key1);
    $fingerprint = $publicKey['fingerprint'];
    // catch errors
    $gpg->seterrormode(gnupg::ERROR_EXCEPTION);
    // enable armored output 
    $gpg->setarmor(1);
    $gpg -> setsignmode(gnupg::SIG_MODE_DETACH);
    
    // encrypt plain text
    try{
        $gpg->addencryptKey($fingerprint);
        $cipher_text = $gpg->encrypt($plain_text);
        echo "\n". $cipher_text ."\n";
    }
    catch(Exception $e){
        die('Error '.$e->getMessage());
    }
    
    /**
     * step #2 (Decryption)
     * decrypt message from [e-mail] in step 1
     */
    
    //public key for [e-mail]
    $publickey2 = "-----BEGIN PGP PUBLIC KEY BLOCK-----
    
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    =9rM9
    -----END PGP PUBLIC KEY BLOCK-----
    ";
    
    //private key for [e-mail]
    $privateKey2 = "-----BEGIN PGP PRIVATE KEY BLOCK-----
    
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    =1CCf
    -----END PGP PRIVATE KEY BLOCK-----
    ";
    
    
    $encryptedPrivateKey=OpenPGP_Message::parse(OpenPGP::unarmor($privateKey2,'PGP PRIVATE KEY BLOCK'));
    
    // Try each secret key packet
    foreach($encryptedPrivateKey as $p) {
        if(!($p instanceof OpenPGP_SecretKeyPacket)) continue;
    
        $key2 = new OpenPGP_SecretKeyPacket($p->key);
    
        $msg = OpenPGP_Message::parse(OpenPGP::unarmor($cipher_text, 'PGP MESSAGE'));
    
        $decryptor = new OpenPGP_Crypt_RSA($key2);
        $decrypted = $decryptor->decrypt($msg);
        var_dump($decrypted);
    }

标签： phpgnupgopenpgp