Return fingerprint along with the public key for repository

lib/travis/api/v2/http/ssh_key.rb

@@ -1,4 +1,5 @@
 require 'openssl'
+require 'travis/private_key'
 
 module Travis
   module Api
@@ -14,9 +15,7 @@ module Travis
           def fingerprint
             value = object.value.decrypt
             return unless value
-            key = OpenSSL::PKey::RSA.new(value)
-            ssh_rsa = "\x00\x00\x00\x07ssh-rsa" + key.e.to_s(0) + key.n.to_s(0)
-            OpenSSL::Digest::MD5.new(ssh_rsa).hexdigest.scan(/../).join(':')
+            PrivateKey.new(value).fingerprint
           rescue OpenSSL::PKey::RSAError
             nil
           end

lib/travis/api/v2/http/ssl_key.rb

@@ -9,9 +9,14 @@ module Travis
             @key = key
           end
 
+          def fingerprint
+            PrivateKey.new(key.private_key).fingerprint
+          end
+
           def data
             {
-              'key' => key.public_key
+              'key' => key.public_key,
+              'fingerprint' => fingerprint
             }
           end
         end

lib/travis/private_key.rb

@@ -0,0 +1,16 @@
+class PrivateKey
+  attr_reader :key
+  def initialize(key)
+    @key = key
+  end
+
+  def fingerprint
+    rsa_key = OpenSSL::PKey::RSA.new(key)
+    public_ssh_rsa = "\x00\x00\x00\x07ssh-rsa" + rsa_key.e.to_s(0) + rsa_key.n.to_s(0)
+    OpenSSL::Digest::MD5.new(public_ssh_rsa).hexdigest.scan(/../).join(':')
+  end
+
+  def inspect
+    "<PrivateKey #{fingerprint}>"
+  end
+end

spec/unit/api/v2/http/ssl_key_spec.rb

@@ -4,9 +4,15 @@ describe Travis::Api::V2::Http::Repository do
   include Travis::Testing::Stubs
   include Support::Formats
 
-  let(:data) { Travis::Api::V2::Http::SslKey.new(stub_key).data }
+  let(:key) {
+    key = stub_key
+    key.stubs(:private_key).returns(TEST_PRIVATE_KEY)
+    key
+  }
+  let(:data) { Travis::Api::V2::Http::SslKey.new(key).data }
 
-  it 'key' do
+  it 'returns data' do
     data['key'].should == '-----BEGIN PUBLIC KEY-----'
+    data['fingerprint'].should == '57:78:65:c2:c9:c8:c9:f7:dd:2b:35:39:40:27:d2:40'
   end
 end