需要帮助了解php签名验证

Question

我正在尝试验证php中的签名,并且已经筋疲力尽地尝试了我在网上找到的每个例子.我已经绕圈子了,所以我现在可能已经错过了解决方案.

所以我有测试数据

$msg = "test data";

使用我的密钥对中的私钥生成此签名

$signature = "avALtk00btVyV74e5UdXJ/VClVV/fsuoLZpXQjiCrkVijsmMZsYWZujN56+Aa2CEQYkomDsm9CJ/Tue7lNP0tYVZz9Y0RngpcV9VT9V3i+3rbvbBEnuJuS/5e+PR7kQGMh8rVuCtHpAJhSePMyipC3kM90EQJ0jyY3rFaHDNpSzVBpOnRYLzqbsdy45v0bN78A2J/HaIhJy87Sh4X1a+WMg9PLkqSSYZnRYOB8XVDCYfyeeekcvI4rvP51wBQcaLwu7S0xPQA8yHfJqMXCqdmBVUQZrk/X+CujdXUyJItDWA8j2N8AHmcAD5oRaJ6bX3zCQFM1QnKMi1ETLudzIqfA==";

这是签名密钥对的公钥

$key = "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxv4nCiH4vXvSLsvlceCOk3yfH1EQgNqNaVGdnFxdw9IIjSVZvTVH45NCodCJ0GlHoDwQM7DMV1+QrtF91cn44xg4Ys9zr1xkaT4jWBTe3YKoTqJoLHR4UU03F6Y1jTELhjY2a2Kt0ijyvAOKM4bm3gCItfMx59ETGInz7Oubb1T4IJ8TuWmZsh+X57c6fgv0B2+eTr/5FMK2VxXV5tHkB9UNLBgnbw0IZuC6izF4OFk9hxgh96i5wCf2HhHaNoEryx7ZV2ZG9a0OQnYZ+x1zaOIw6dJkV7rip3H57ksQfoQWM0GKMBB7cWIgWsf/GlbYTVgw26MvzEzGPb9uCfx8rwIDAQAB";

我试过用这个包装钥匙

$pubkey = "-----BEGIN RSA PUBLIC KEY-----" . $key . "-----END RSA PUBLIC KEY-----";

并与此

$pubkey = "-----BEGIN PUBLIC KEY-----" . $key . "-----END PUBLIC KEY-----";

我已经尝试使用两个包装创建一个公钥ID,没有任何包装,就像这样

$pubkeyid = openssl_pkey_get_public($pubkey);
$pubkeyid = openssl_pkey_get_public($key);

我已经尝试使用$ key和$ pubkeyid验证签名,使用各种算法,没有,就像这样

openssl_verify($msg, base64_decode($signature), $pubkeyid);
openssl_verify($msg, base64_decode($signature), $key);
openssl_verify($msg, base64_decode($signature), $pubkeyid, "sha256withRSAEncryption");
openssl_verify($msg, base64_decode($signature), $key, "sha256withRSAEncryption");
openssl_verify($msg, base64_decode($signature), $pubkeyid, OPENSSL_ALGO_SHA256);
openssl_verify($msg, base64_decode($signature), $key, OPENSSL_ALGO_SHA256);

我可能尝试了其他一些排列,但现在不记得了.我头疼.

无论我尝试什么,我都没有设法验证签名.我可以轻松地使用java中的公钥来验证签名.

我讨厌要求一个有效的PHP示例,因为我已经尝试了很多我已经在网上找到的并且无法让它们工作.不幸的是phpseclib对我来说不是一个选择,所以我必须使用openssl.

我哪里错了？

Answer 1

感谢@miken32，我现在终于修复了代码。事实证明，我在格式化 PEM 密钥时缺少了几个换行符。所以最终的、非常简单的代码是：

// Get base64 encoded public key.
// NOTE: this is just for testing the code, final production code stores the public key in a db.
$pubkey = $_POST['pubkey'];

// Convert pubkey in to PEM format (don't forget the line breaks).
$pubkey_pem = "-----BEGIN PUBLIC KEY-----\n$pubkey\n-----END PUBLIC KEY-----";

// Get public key.
$key = openssl_pkey_get_public($pubkey_pem);

if ($key == 0)
{
    $result = "Bad key zero.";
}
elseif ($key == false)
{
    $result = "Bad key false.";
}
else
{
    // Verify signature (use the same algorithm used to sign the msg).
    $result = openssl_verify($msg, base64_decode($signature), $key, OPENSSL_ALGO_SHA256);

    if ($result == 1)
    {
        $result = "Verified";
    }
    elseif ($result == 0)
    {
        $result = "Unverified";
    }
    else
    {
        $result = "Unknown verification response";
    }

}

// do something with the result.