無法使用 openssl_private_decrypt 解密任何消息

Question

我嘗試使用openssl_private_decrypt function 從 php 解密 RSA 加密消息。 但是 function 總是返回 null。

我的 function 如下：

function (){
    $encrypted = 'gu6F7PFj2t+Mchp2Vi8dpiEXXVDkrjrSoOnRlCWeZYjOL6WdjvxULyEG5j9dZPORNMYx5eB9gTdni4NYYCKW3GTGS0zaKGgadChy/KZAUo40sBVmTFN3YOT6FfEr4oXZ9c0DqSRJ/LrZsZvsiHh52LleA9sapOgsm0bsgWzgnnE=';
    $privateKey = '-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----';
    return openssl_private_decrypt(base64_decode($encrypted), $decrypted, $privateKey);
}

解密后的內容如下： Salut les amis

Answer 1

您可以稍微修改代碼以檢測錯誤

function (){

    $encrypted = 'gu6F7PFj2t+Mchp2Vi8dpiEXXVDkrjrSoOnRlCWeZYjOL6WdjvxULyEG5j9dZPORNMYx5eB9gTdni4NYYCKW3GTGS0zaKGgadChy/KZAUo40sBVmTFN3YOT6FfEr4oXZ9c0DqSRJ/LrZsZvsiHh52LleA9sapOgsm0bsgWzgnnE=';
    $privateKey = '-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----';

    if (!openssl_private_decrypt(base64_decode($encrypted), $decrypted, $privateKey)) {
        throw new Exception(openssl_error_string());
    }
    return $decrypted;
}

我機器上的結果是：

PHP Fatal error:  Uncaught Exception: error:0407109F:rsa routines:RSA_padding_check_PKCS1_type_2:pkcs decoding error in /home/foobar/test.php:20

因此，在解碼加密字符串時會出現“pkcs 解碼錯誤”。 並且您的openssl_private_decrypt未能解密您的消息。 請檢查您加密/ base64_encode文本的方式，看看您是否有任何錯誤。