Php 获取密钥参数不是openssl_public_encrypt（）中的有效公钥错误

$publicKey=“../ssh/public/pub”； $plaintext=“要加密的字符串”

上面的代码生成以下错误

openssl_public_encrypt（）[http://php.net/function.openssl-public-encrypt]：key参数不是有效的公钥[APP/controllers/supportservice_controller.php，第144行]

我使用openssl创建了密钥，使用：

生成一个1024位rsa私钥，请求密码短语对其进行加密并保存到文件 openssl genrsa-des3-out/path/to/privatekey 1024

为私钥生成公钥并保存到文件

---

openssl rsa-in/path/to/privatekey-pubout-out/path/to/publickey

在PHP中使用openssl函数时，公钥必须封装在X.509证书中。您可以使用CSR创建此项。或者您可以直接使用原始公钥。例如

<?php
include('Crypt/RSA.php');

$rsa = new Crypt_RSA();
$rsa->loadKey('...'); // public key

$plaintext = '...';

//$rsa->setEncryptionMode(CRYPT_RSA_ENCRYPTION_PKCS1);
$ciphertext = $rsa->encrypt($plaintext);

---

像这样，您可以添加密钥并加密文本

  $data = json_decode(file_get_contents('php://input'), true);
  $enctext = $data['enctext'];

  $pubkey = '-----BEGIN PUBLIC KEY-----
             PUBLIC  KEY PLACED HERE
             -----END PUBLIC KEY-----';

  openssl_public_encrypt($enctext, $crypted, $pubkey);
  $data['enctext'] =  $enctext;
  $data['Encryption_text'] = base64_encode($crypted);
  echo json_encode($data);
  exit;

或者，您也可以调用公钥的.cert文件

  $fp=fopen("publickey.crt","r"); 
  $pub_key_string=fread($fp,8192); 
  fclose($fp); 
  $key_resource = openssl_get_publickey($pub_key_string); 

  openssl_public_encrypt($enctext, $crypted, $key_resource );
  $data['enctext'] =  $enctext;
  $data['Encryption_text'] = base64_encode($crypted);
  echo json_encode($data);
  exit;

在PHP 7.x和新版本的phpseclib（纯PHP RSA实现）中，使用composer安装phpseclib，可以执行以下操作：

    # Install the phpseclib from console
    composer require phpseclib/phpseclib:~2.0

在我的例子中，我将公钥拆分为多行，解决了这个问题

PHP版本7.1.17

    $publicKey = "-----BEGIN PUBLIC KEY-----\n" . wordwrap($publicKey, 64, "\n", true) . "\n-----END PUBLIC KEY-----";

    $str = "str to be encrypted";

    $opensslPublicEncrypt = openssl_public_encrypt($str, $encrypted, $publicKey);

看到这个了吗
    // In your php script:

    use phpseclib\Crypt\RSA;

    $rsa = new RSA();
    $rsa->loadKey($publicKey); # $publicKey is an string like "QEFAAOCAQ8AMIIBCgKCAQEAoHcbG....."
    $plaintext = '...';
    $ciphertext = $rsa->encrypt($plaintext);

    var_dump($ciphertext);

    #to decrypt:
    $rsa->loadKey('...'); // private key
    echo $rsa->decrypt($ciphertext);```




    $publicKey = "-----BEGIN PUBLIC KEY-----\n" . wordwrap($publicKey, 64, "\n", true) . "\n-----END PUBLIC KEY-----";

    $str = "str to be encrypted";

    $opensslPublicEncrypt = openssl_public_encrypt($str, $encrypted, $publicKey);