从Ruby打开RSA私钥 [英] Opening an RSA private key from Ruby

问题描述

我认为我知道如何创建自定义加密的RSA密钥，但是如何读取一个像ssh-keygen一样的加密？

I think I know how to create custom encrypted RSA keys, but how can I read one encrypted like ssh-keygen does?

我知道我可以这样做：

OpenSSL::PKey::RSA.new(File.read('private_key'))

但是OpenSSL要求我输入密码...如何将其作为参数传递给OpenSSL ？

But then OpenSSL asks me for the passphrase... How can I pass it to OpenSSL as a parameter?

而且，如何创建一个与ssh-keygen生成的兼容？

And, how can I create one compatible to the ones generated by ssh-keygen?

我做这样创建私人加密密钥：

I do something like this to create private encrypted keys:

pass = '123456'
key = OpenSSL::PKey::RSA.new(1024)
key = "0000000000000000#{key.to_der}"
c = OpenSSL::Cipher::Cipher.new('aes-256-cbc')
c.encrypt
c.key = Digest::SHA1.hexdigest(pass).unpack('a2' * 32).map {|x| x.hex}.pack('c' * 32)
c.iv = iv
encrypted_key = c.update(key)
encrypted_key << c.final

另外，由OpenSSL :: PKey :: RSA.new（1024）生成的密钥没有加密），当我尝试无密码登录时（即，将公钥复制到服务器并使用私有密码登录），不工作。

Also, keys generated by OpenSSL::PKey::RSA.new(1024) (without encryption), don't work when I try password-less logins (i.e., I copy the public key to the server and use the private one to login).

此外，当我通过OpenSSL打开一个ssh-keygen文件，然后检查它的内容，它似乎在键的开头和结尾有其他字符。这是否正常？

Also, when I open an ssh-keygen file via OpenSSL and then check its contents, it appears to have additional characters at the beginning and end of the key. Is this normal?

我真的不了解这些安全性的一些东西，但我正在尝试学习。我做错了什么？

I don't really understand some of this security stuff, but I'm trying to learn. What is it that I'm doing wrong?

推荐答案

我已经取得了一些进展。如果我使用Net :: SSH库，我可以这样做：

I've made some progress on this. If I use the Net::SSH library, I can do this:

Net::SSH::KeyFactory.load_private_key 'keyfile', 'passphrase'

通过阅读源代码，我还没有弄清楚图书馆做了什么OpenSSL的PKey :: RSA.new来完成这个...然后我再去测试一下，肯定够了，OpenSSL可以打开私钥，没有Net :: SSH ...我做了这么多的测试，不知何故我以前没有正确测试。

By reading the source code I have yet to figure out what the library does to OpenSSL's PKey::RSA.new to accomplish this... And then I go and test again, and sure enough, OpenSSL can open the private key just fine without Net::SSH... I've made so much tests that somehow I didn't test this correctly before.

但是我仍然有创建SSH兼容密钥对的问题，也许我会再次测试，并且答案：P ... nah，我对那部分不感兴趣

But I still have the issue of creating an SSH compatible key pair... and maybe I'll go test again and have the answer :P ... nah, I'm not that interested in that part

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