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Versions: 19
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Contents
require 'openssl'
require 'sshkey'
require 'base64'
module SSHScan
# All cryptography related methods.
module Crypto
# House methods helpful in analysing SSH public keys.
class PublicKey
def initialize(key)
@key = key
end
# Is the current key known to be in our known bad key list
# @return [Boolean] true if this {SSHScan::Crypto::PublicKey}
# instance's key is also in {SSHScan::Crypto}'s
# bad_public_keys, otherwise false
def bad_key?
SSHScan::Crypto.bad_public_keys.each do |other_key|
if self.fingerprint_sha256 == other_key.fingerprint_sha256
return true
end
end
return false
end
# Generate MD5 fingerprint for this {SSHScan::Crypto::PublicKey} instance.
# @return [String] formatted MD5 fingerprint
def fingerprint_md5
OpenSSL::Digest::MD5.hexdigest(::Base64.decode64(@key)).scan(/../).join(':')
end
# Generate SHA1 fingerprint for this {SSHScan::Crypto::PublicKey} instance.
# @return [String] formatted SHA1 fingerprint
def fingerprint_sha1
OpenSSL::Digest::SHA1.hexdigest(::Base64.decode64(@key)).scan(/../).join(':')
end
# Generate SHA256 fingerprint for this {SSHScan::Crypto::PublicKey} instance.
# @return [String] formatted SHA256 fingerprint
def fingerprint_sha256
OpenSSL::Digest::SHA256.hexdigest(::Base64.decode64(@key)).scan(/../).join(':')
end
end
def self.bad_public_keys
bad_keys = []
Dir.glob("data/ssh-badkeys/host/*.key").each do |file_path|
file = File.read(File.expand_path(file_path))
key = SSHKey.new(file)
bad_keys << SSHScan::Crypto::PublicKey.new(key.ssh_public_key.split[1])
end
return bad_keys
end
end
end
Version data entries
19 entries across 19 versions & 1 rubygems