class Vagrant::Util::Keypair
Public Class Methods
create(password=nil)
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Creates an SSH
keypair and returns it.
@param [String] password Password for the key, or nil for no password. @return [Array<String, String, String>] PEM-encoded public and private key,
respectively. The final element is the OpenSSH encoded public key.
# File lib/vagrant/util/keypair.rb, line 17 def self.create(password=nil) # This sometimes fails with RSAError. It is inconsistent and strangely # sleeps seem to fix it. We just retry this a few times. See GH-5056 rsa_key = nil retryable(on: OpenSSL::PKey::RSAError, sleep: 2, tries: 5) do rsa_key = OpenSSL::PKey::RSA.new(2048) end public_key = rsa_key.public_key private_key = rsa_key.to_pem if password cipher = OpenSSL::Cipher.new('des3') private_key = rsa_key.to_pem(cipher, password) end # Generate the binary necessary for the OpenSSH public key. binary = [7].pack("N") binary += "ssh-rsa" ["e", "n"].each do |m| val = public_key.send(m) data = val.to_s(2) first_byte = data[0,1].unpack("c").first if val < 0 data[0] = [0x80 & first_byte].pack("c") elsif first_byte < 0 data = 0.chr + data end binary += [data.length].pack("N") + data end openssh_key = "ssh-rsa #{Base64.encode64(binary).gsub("\n", "")} vagrant" public_key = public_key.to_pem return [public_key, private_key, openssh_key] end