cURL sftp 公钥认证失败“回调错误"

问题描述

我有一些 php 代码可以很好地使用 cURL 将文件上传到仅使用用户 & 的主机.密码 ftp，现在我必须上传到只允许公钥身份验证的服务器并收到错误:* SSH 公钥身份验证失败:回调返回错误"

I have some php code which works well uploading files using cURL to hosts which are simply using user & password ftp, now I have to upload to a server which only allows public key auth and am getting the error: "* SSH public key authentication failed: Callback returned error"

我的密钥有问题，因为它们的格式不正确，但后来将它们放入正确的单行格式，这阻止了非 base64 编码"错误.我在网上找不到太多关于这个回调错误的帮助.

I had a problem with the keys as they were not in the right format, but have since put them in the correct single line format and this stopped the "not base64 encoded" errors. I can't find much help on this callback error online.

我的代码如下.

$ch = curl_init();
curl_setopt($ch, CURLOPT_VERBOSE, TRUE); 
curl_setopt($ch, CURLOPT_URL, 'sftp://user:@12.12.12.12:22/testfile.gz');
curl_setopt($ch, CURLOPT_PROTOCOLS, CURLPROTO_SFTP);
curl_setopt($ch, CURLOPT_SSH_PUBLIC_KEYFILE,'C:keyspublic.pub');
curl_setopt($ch, CURLOPT_SSH_PRIVATE_KEYFILE,'C:keysprivate.ppk');
curl_setopt($ch, CURLOPT_SSH_HOST_PUBLIC_KEY_MD5,'2acfe24108c37a276a93ac3398a5oe8f');
curl_setopt($ch, CURLOPT_SSH_AUTH_TYPES,CURLSSH_AUTH_PUBLICKEY);
curl_setopt($ch, CURLOPT_UPLOAD, 1);
$fp = fopen($localfile, 'r');
curl_setopt($ch, CURLOPT_INFILE, $fp);
curl_setopt($ch, CURLOPT_INFILESIZE, filesize($localfile));
$sR = curl_exec ($ch);

这是运行测试的输出

* About to connect() to 12.12.12.12 port 22 (#0)
*   Trying 12.12.12.12...
* connected
* Connected to 12.12.12.12 (12.12.12.12) port 22 (#0)
* SSH MD5 fingerprint: ebbc61b886c798b25073c912833ffers
* SSH authentication methods available: publickey
* Using ssh public key file C:keyspublic.pub
* Using ssh private key file C:keysprivate.ppk
* SSH public key authentication failed: Callback returned error
* Authentication failure
* Closing connection #0

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推荐答案

当你的 libssh2 是用 libgcrypt 构建时，有一些情况(基于 debian 的发行版).其中，使用 PEM 编码的私钥文件:

There are cases (debian-based distros) when your libssh2 is built with libgcrypt. In those, use PEM-encoded private key file:

$ openssl rsa -in ~/.ssh/id_rsa -outform pem > id_rsa.pem

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