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require 'spec_helper'
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require 'securerandom'
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RSpec.describe Rex::Crypto do
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    let(:iv) {
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      SecureRandom.random_bytes(16)
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    }
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    let(:key) {
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      SecureRandom.random_bytes(32)
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    }
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    let(:value) {
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      'Hello World'
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    }
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  describe '#encrypt_aes256' do
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    it 'raises an exception due to a short IV' do
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      iv = SecureRandom.random_bytes(1)
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      # Because it could raise either a OpenSSL::Cipher::CipherError or an ArgumentError
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      # dependong on the environment, we will just expect it to raise an exception
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      expect { Rex::Crypto.encrypt_aes256(iv, key, value) }.to raise_exception ArgumentError
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    end
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    it 'raises an exception due to a short key' do
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      key = SecureRandom.random_bytes(1)
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      # Because it could raise either a OpenSSL::Cipher::CipherError or an ArgumentError
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      # dependong on the environment, we will just expect it to raise an exception
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      expect { Rex::Crypto.encrypt_aes256(iv, key, value) }.to raise_exception ArgumentError
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    end
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    it 'encrypts the string Hello World' do
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      encrypted_str = Rex::Crypto.encrypt_aes256(iv, key, value)
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      expect(encrypted_str).not_to eq(value)
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    end
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  end
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  describe '#decrypt_aes256' do
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    it 'raises an exception due to a short IV' do
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      iv = SecureRandom.random_bytes(1)
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      # Because it could raise either a OpenSSL::Cipher::CipherError or an ArgumentError
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      # dependong on the environment, we will just expect it to raise an exception
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      expect { Rex::Crypto.decrypt_aes256(iv, key, value) }.to raise_exception ArgumentError
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    end
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    it 'raises an exception due to a short key' do
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      key = SecureRandom.random_bytes(1)
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      # Because it could raise either a OpenSSL::Cipher::CipherError or an ArgumentError
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      # dependong on the environment, we will just expect it to raise an exception
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      expect { Rex::Crypto.decrypt_aes256(iv, key, value) }.to raise_exception ArgumentError
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    end
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    it 'decrypts the value to Hello World' do
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      encrypted_str = Rex::Crypto.encrypt_aes256(iv, key, value)
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      decrypted_str = Rex::Crypto.decrypt_aes256(iv, key, encrypted_str)
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      expect(decrypted_str).to eq(value)
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    end
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  end
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end
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