msfvenom_spec.rb

require 'spec_helper'
require 'msf/core'
# doesn't end in .rb or .so, so have to load instead of require
load File.join(Msf::Config.install_root, 'msfvenom')

shared_examples_for "nop dumper" do
	it "should list known nops" do
		%w!
			x86/opty2
			armle/simple
		!.each do |name|
			dump.should include(name)
		end
	end
end

shared_examples_for "encoder dumper" do
	it "should list known encoders" do
		%w!
			generic/none
			x86/shikata_ga_nai
			x64/xor
		!.each do |name|
			dump.should include(name)
		end
	end
end

shared_examples_for "payload dumper" do
	it "should list known payloads" do
		# Just a representative sample of some of the important ones.
		%w!
			cmd/unix/reverse
			java/meterpreter/reverse_tcp
			java/meterpreter/reverse_https
			linux/x86/shell/reverse_tcp
			linux/x86/shell_reverse_tcp
			linux/x64/shell/reverse_tcp
			linux/x64/shell_reverse_tcp
			linux/armle/shell/reverse_tcp
			linux/armle/shell_reverse_tcp
			linux/mipsbe/shell_reverse_tcp
			php/meterpreter/reverse_tcp
			windows/meterpreter/reverse_tcp
			windows/meterpreter/reverse_https
		!.each do |name|
			dump.should include(name)
		end
	end
end

describe MsfVenom do

	let(:stdin)  { StringIO.new("", "rb") }
	let(:stdout) { StringIO.new("", "wb") }
	let(:stderr) { StringIO.new("", "wb") }
	subject(:venom) { described_class.new(stdin, stdout, stderr, framework) }
	before(:each) do
		conf_dir = Metasploit::Framework.root.join('spec', 'dummy', 'framework','config')
		conf_dir.mkpath
	end
	after(:each) do
		dummy_dir = Metasploit::Framework.root.join('spec', 'dummy')
		dummy_dir.rmtree
	end

	before(:all) do
		conf_dir = Metasploit::Framework.root.join('spec', 'dummy', 'framework','config')
		conf_dir.mkpath
		create_opts = {
			:module_types => [
				::Msf::MODULE_PAYLOAD, ::Msf::MODULE_ENCODER, ::Msf::MODULE_NOP
			],
			'ConfigDirectory' => conf_dir.to_s,
			'DisableDatabase' => true
		}
		@framework = ::Msf::Simple::Framework.create(create_opts)
	end

	let(:framework) { @framework }
	describe "#dump_encoders" do
		it_behaves_like "encoder dumper" do
			let(:dump) { venom.dump_encoders }
		end
	end

	describe "#dump_nops" do
		it_behaves_like "nop dumper" do
			let(:dump) { venom.dump_nops }
		end
	end

	describe "#dump_payloads" do
		it_behaves_like "payload dumper" do
			let(:dump) { venom.dump_payloads }
		end
	end

	describe "#parse_args" do

		context "help" do
			it "should raise UsageError" do
				expect { venom.parse_args(%w! -h !) }.to raise_error(MsfVenom::UsageError)
				expect { venom.parse_args(%w! --help !) }.to raise_error(MsfVenom::UsageError)
				expect { venom.parse_args(%w! --help-formats !) }.to raise_error(MsfVenom::UsageError)
			end
		end

		context "with bad arguments" do

			it "should raise UsageError with empty arguments" do
				expect { venom.parse_args([]) }.to raise_error(MsfVenom::UsageError)
			end

			it "should raise with unexpected options" do
				expect { venom.parse_args(%w! --non-existent-option !) }.to raise_error(MsfVenom::UsageError)
			end

			%w! --platform -a -b -c -f -p -n -s -i -x !.each do |required_arg|
				it "should raise UsageError with no arg for option #{required_arg}" do
					expect { venom.parse_args([required_arg]) }.to raise_error(MsfVenom::UsageError)
				end
			end

		end

	end

	describe "#generate_raw_payload" do

		before do
			venom.parse_args(args)
		end

		context "with --options" do

			context "and a payload" do
				let(:args) { %w! -o -p windows/meterpreter/reverse_tcp ! }
				it "should print options" do
					expect { venom.generate_raw_payload }.to_not raise_error
					output = stderr.string
					output.should include("LHOST")
					output.should include("LPORT")
				end
				context "and some datastore options" do
					it "should print options" do
						venom.parse_args %w! -o -p windows/meterpreter/reverse_tcp LPORT=1234!
						expect { venom.generate_raw_payload }.to_not raise_error
						output = stderr.string
						output.should include("LHOST")
						output.should match(/LPORT\s+1234/)
					end

					it "should print options case-insensitively" do
						venom.parse_args %w! -o -p windows/meterpreter/reverse_tcp lPoRt=1234!
						expect { venom.generate_raw_payload }.to_not raise_error
						output = stderr.string
						output.should include("LHOST")
						output.should match(/LPORT\s+1234/)
					end
				end
			end

			context "and an invalid payload" do
				let(:args) { %w! -o -p asdf! }
				it "should raise" do
					expect { venom.generate_raw_payload }.to raise_error(MsfVenom::UsageError)
				end
			end

		end

		[
			{ :format => "elf", :arch => "x86" },
			{ :format => "raw", :arch => "x86" },
			{ :format => "elf", :arch => "armle" },
			{ :format => "raw", :arch => "armle" },
			{ :format => "elf", :arch => "ppc" },
			{ :format => "raw", :arch => "ppc" },
			{ :format => "elf", :arch => "mipsle" },
			{ :format => "raw", :arch => "mipsle" },
		].each do |format_hash|
			format = format_hash[:format]
			arch = format_hash[:arch]

			context "building #{format} with linux/#{arch}/shell_bind_tcp" do
				let(:args) { %W! -f #{format} -p linux/#{arch}/shell_bind_tcp ! }
				# We're not encoding, so should be testable here
				it "should contain /bin/sh" do
					output = venom.generate_raw_payload
					# Usually push'd in two instructions, so the whole string
					# isn't all together. Check for the two pieces seperately
					output.should include("/sh")
					output.should include("/bin")
				end
			end

		end

	end

	describe "#generate" do
		include_context 'Msf::Util::Exe'

		before { venom.parse_args(args) }

		context "with --list" do

			context "with invalid module type" do
				let(:args) { %w!--list asdf! }
				it "should raise UsageError" do
					expect { venom.generate }.to raise_error(MsfVenom::UsageError)
				end
			end

			[ "nop", "encoder", "payload" ].each do |type|
				context "#{type}s" do
					let(:args) { %W!--list #{type}s! }
					it_behaves_like "#{type} dumper" do
						let(:dump) do
							venom.generate
							stderr.string
						end
					end
				end
			end

		end

		context "with invalid datastore option" do
			let(:args) { %w!-f exe -p windows/shell_reverse_tcp LPORT=asdf! }
			it "should fail validation" do
				expect { venom.generate }.to raise_error(Msf::OptionValidateError)
			end
		end

		context "without required datastore option" do
			# Requires LHOST
			let(:args) { %w!-f exe -p windows/shell_reverse_tcp! }
			it "should fail validation" do
				expect { venom.generate }.to raise_error(Msf::OptionValidateError)
			end
		end

		@platform_format_map.each do |plat, formats|
			formats.each do |format_hash|
				format = format_hash[:format]
				arch = format_hash[:arch]
				# Need a new context for each so the let() will work correctly
				context "with format=#{format} platform=#{plat} arch=#{arch}" do
					# This will build executables with no payload. They won't work
					# of course, but at least we can see that it is producing the
					# correct file format for the given arch and platform.
					let(:args) { %W! -p - -f #{format} -a #{arch} --platform #{plat} ! }
					it "should print a #{format} to stdout" do
						venom.generate
						output = stdout.string
						verify_bin_fingerprint(format_hash, output)
					end
				end
			end
		end

	end

end