openssl_pkey_get_private返回字符串''

Question

最近我使用openssl生成RSA私钥来加密我的数据。

    $private_key = "-----BEGIN RSA PRIVATE KEY----- MIICXQIBAAKBgQDGCn4a42xSG6Hs0h+BSWG/MQmXOpIqd6ptlfFxMFQeL9bvJ9jR j0842NyaWIAedxQrv/0+XC5pYF8ExrcGXCnWtCpUTK2M6cgkTLgkkptLz5N+z8jd AeSbakKkJuQEgEyKI1cIrjRhz6u6yfjoPKZAmVdlwEDN1u4TweZ1HDDxHQIDAQAB AoGANPgvfI+htGBxsf8NsC3peBLspsdiuvsg2YjGeGjdxukyyurUglCbdvACKUJM mlltSrpiSOCtBUBiicuAvrG9+pdjQb1gPui/xj83ZbNytfG6K8UFk6cokH6fEgON Pd3npWlhXwdrJUxcFLzlJzREq18VyAWwgsbH82//ineOF6ECQQD3HOpE+IQ2JDIL Kxna/rVnW5RSvImddKksC4KLk7IsMFqsfo+e/Vkf3D7vmsMDCXCNpt5+ttLF93lU 3Iz1j/bJAkEAzSnJ4kp9rsvf7X5OqLWOJjR6CDGK3RSwSXeSMoJSIvV6rSXXQryU ltiYct5A5Oi3g49cOYNuYMt1bw3uTEVNtQJBAKqR7e8fr3sDrvtgi99LE4I9h3s4 orDp1uANLdYUY9b2pZANaCtxavR//X08UUGmYWeVeFz06zY05S47cp0J+2kCQEyk CbixHxZHLtWnU3cOq5V2EQgyia9g5SHsuv6HVGuezD8WXb2eeNuI+hofEJrynGtX CJqrkHY0SyA7UgPH9+kCQQDRrxJ4plB0nWqhLpdc3OV74vW0m11LS8+270nMMVN1 IP08iRfF4ASWEXoe5A2LNEP4ydFw68Ve08WaRwSJ65kn -----END RSA PRIVATE KEY-----";

    $pi_key =  openssl_pkey_get_private($private_key);
    var_dump($pikey."\n");

返回：

string(1) "
"

我在我的本地wampserver使用它，但我得到的返回数据是资源。

string(16) "Resource id #46
"

我的openssl版本：

Answer 1

OpenSSL是pretty picky when it comes to keys。所有base64编码的数据都需要跨越多行，每行最多64行。我使用phpseclib来转换你的密钥，它在转换后对我来说很好（而之前没有）：

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

$key = '-----BEGIN RSA PRIVATE KEY----- MIICXQIBAAKBgQDGCn4a42xSG6Hs0h+BSWG/MQmXOpIqd6ptlfFxMFQeL9bvJ9jR j0842NyaWIAedxQrv/0+XC5pYF8ExrcGXCnWtCpUTK2M6cgkTLgkkptLz5N+z8jd AeSbakKkJuQEgEyKI1cIrjRhz6u6yfjoPKZAmVdlwEDN1u4TweZ1HDDxHQIDAQAB AoGANPgvfI+htGBxsf8NsC3peBLspsdiuvsg2YjGeGjdxukyyurUglCbdvACKUJM mlltSrpiSOCtBUBiicuAvrG9+pdjQb1gPui/xj83ZbNytfG6K8UFk6cokH6fEgON Pd3npWlhXwdrJUxcFLzlJzREq18VyAWwgsbH82//ineOF6ECQQD3HOpE+IQ2JDIL Kxna/rVnW5RSvImddKksC4KLk7IsMFqsfo+e/Vkf3D7vmsMDCXCNpt5+ttLF93lU 3Iz1j/bJAkEAzSnJ4kp9rsvf7X5OqLWOJjR6CDGK3RSwSXeSMoJSIvV6rSXXQryU ltiYct5A5Oi3g49cOYNuYMt1bw3uTEVNtQJBAKqR7e8fr3sDrvtgi99LE4I9h3s4 orDp1uANLdYUY9b2pZANaCtxavR//X08UUGmYWeVeFz06zY05S47cp0J+2kCQEyk CbixHxZHLtWnU3cOq5V2EQgyia9g5SHsuv6HVGuezD8WXb2eeNuI+hofEJrynGtX CJqrkHY0SyA7UgPH9+kCQQDRrxJ4plB0nWqhLpdc3OV74vW0m11LS8+270nMMVN1 IP08iRfF4ASWEXoe5A2LNEP4ydFw68Ve08WaRwSJ65kn -----END RSA PRIVATE KEY-----';

$pi_key = openssl_pkey_get_private($key);

var_dump($pi_key);

echo "\r\n";

$rsa = new Crypt_RSA();
$rsa->loadKey($key);

$pi_key =  openssl_pkey_get_private($rsa);
var_dump($pi_key);

echo "\r\n";

第一个输出bool(false)，第二个输出resource(8) of type (OpenSSL key)。