add change password functionality (#26)

bin/minisign

@@ -12,6 +12,15 @@ op = OptionParser.new do |opts|
   opts.on('-G') do |g|
     options[:G] = g
   end
+  opts.on('-R') do |r|
+    options[:R] = r
+  end
+  opts.on('-C') do |c|
+    options[:C] = c
+  end
+  opts.on('-W') do |w|
+    options[:W] = w
+  end
   opts.on('-f') do |f|
     options[:f] = f
   end
@@ -35,3 +44,4 @@ end
 
 Minisign::CLI.generate(options) if options[:G]
 Minisign::CLI.recreate(options) if options[:R]
+Minisign::CLI.recreate(options) if options[:C]

lib/minisign/cli.rb

@@ -74,5 +74,15 @@ def self.recreate(options)
       end
       File.write(public_key, private_key.public_key)
     end
+
+    def self.change_password(options)
+      options[:s] || "#{Dir.home}/.minisign/minisign.key"
+      print 'Password: '
+      private_key = Minisign::PrivateKey.new(File.read(options[:s]), prompt)
+      print 'New Password: '
+      new_password = options[:W] ? nil : prompt
+      private_key.change_password! new_password
+      File.write(options[:s], private_key)
+    end
   end
 end

spec/minisign/cli_spec.rb

@@ -52,4 +52,32 @@
       expect(new_public_key).to eq(existing_public_key)
     end
   end
+
+  describe '.change_password' do
+    before do
+      FileUtils.cp('test/minisign.key', 'test/generated/minisign.key')
+      @options = {
+        s: 'test/generated/minisign.key'
+      }
+      @old_password = 'password'
+    end
+    it 'changes the password for the private key' do
+      new_password = SecureRandom.uuid
+      allow(Minisign::CLI).to receive(:prompt).and_return(@old_password, new_password)
+      Minisign::CLI.change_password(@options)
+      expect do
+        Minisign::PrivateKey.new(File.read(@options[:s]), new_password)
+      end.not_to raise_error
+    end
+
+    it 'changes the password for the private key without a password'
+
+    it 'removes the password for the private key' do
+      allow(Minisign::CLI).to receive(:prompt).and_return(@old_password)
+      Minisign::CLI.change_password(@options.merge({ W: true }))
+      expect do
+        Minisign::PrivateKey.new(File.read(@options[:s]))
+      end.not_to raise_error
+    end
+  end
 end