php - 从 PHP 生成 SSH key 对

Question

我想从 php 生成 ssh key 对，谁能指导我怎么做？我已经尝试过 shell_exec 但 shell 会询问问题，因此该命令不起作用。我想指定生成后放置 key 的文件名和路径。

Answer 1

这是基于Converting an OpenSSL generated RSA public key to OpenSSH format (PHP) .谢谢shevron .

<?php
$rsaKey = openssl_pkey_new(array( 
              'private_key_bits' => 1024, 
              'private_key_type' => OPENSSL_KEYTYPE_RSA));

$privKey = openssl_pkey_get_private($rsaKey); 
openssl_pkey_export($privKey, $pem); //Private Key
$pubKey = sshEncodePublicKey($rsaKey); //Public Key

$umask = umask(0066); 
file_put_contents('/tmp/test.rsa', $pem); //save private key into file
file_put_contents('/tmp/test.rsa.pub', $pubKey); //save public key into file

print "Private Key:\n $pem \n\n";
echo "Public key:\n$pubKey\n\n";

function sshEncodePublicKey($privKey) {
    $keyInfo = openssl_pkey_get_details($privKey);
    $buffer  = pack("N", 7) . "ssh-rsa" .
    sshEncodeBuffer($keyInfo['rsa']['e']) . 
    sshEncodeBuffer($keyInfo['rsa']['n']);
    return "ssh-rsa " . base64_encode($buffer);
}

function sshEncodeBuffer($buffer) {
    $len = strlen($buffer);
    if (ord($buffer[0]) & 0x80) {
        $len++;
        $buffer = "\x00" . $buffer;
    }
    return pack("Na*", $len, $buffer);
}
?>