Added Text::Patterns::HEX_BYTE (issue #553).

lib/ronin/support/text/patterns/numeric.rb

@@ -42,6 +42,11 @@ module Patterns
         # @since 0.4.0
         DECIMAL_OCTET = DECIMAL_BYTE
 
+        # Regular expression for finding hexadecimal bytes (00 - ff).
+        #
+        # @since 1.2.0
+        HEX_BYTE = /(?:0x)?[0-9a-fA-F]{2}/
+
         # Regular expression for finding all hexadecimal numbers in text.
         #
         # @since 1.0.0

spec/text/patterns/numeric_spec.rb

@@ -35,6 +35,40 @@
     end
   end
 
+  describe "HEX_BYTE" do
+    subject { described_class::HEX_BYTE }
+
+    it "must match 00 - ff" do
+      hex_bytes = (0..255).map { |byte| "%.2x" % byte }
+
+      expect(hex_bytes).to all(match(subject))
+    end
+
+    it "must match 00 - FF" do
+      hex_bytes = (0..255).map { |byte| "%.2X" % byte }
+
+      expect(hex_bytes).to all(match(subject))
+    end
+
+    it "must only match two hexadecimal digits" do
+      string = "a1b2"
+
+      expect(string[subject]).to eq("a1")
+    end
+
+    it "must match 0x00 - 0xff" do
+      hex_bytes = (0..255).map { |byte| "0x%.2x" % byte }
+
+      expect(hex_bytes).to all(match(subject))
+    end
+
+    it "must match 0x00 - 0xFF" do
+      hex_bytes = (0..255).map { |byte| "0x%.2X" % byte }
+
+      expect(hex_bytes).to all(match(subject))
+    end
+  end
+
   describe "HEX_NUMBER" do
     subject { described_class::HEX_NUMBER }