Hex encoder and decoder

pkg/pencode/encoders.go

@@ -8,6 +8,8 @@ import (
 var availableEncoders = map[string]Encoder{
 	"b64encode":    Base64Encoder{},
 	"b64decode":    Base64Decoder{},
+	"hexencode":    HexEncoder{},
+	"hexdecode":    HexDecoder{},
 	"urlencode":    URLEncoder{},
 	"urldecode":    URLDecoder{},
 	"urlencodeall": URLEncoderAll{},

pkg/pencode/hexdecoder.go

@@ -0,0 +1,16 @@
+package pencode
+
+import (
+	"encoding/hex"
+)
+
+type HexDecoder struct{}
+
+func (h HexDecoder) Encode(input []byte) ([]byte, error) {
+	cleaned := removeAllWhitespace(string(input))
+	return hex.DecodeString(cleaned)
+}
+
+func (h HexDecoder) HelpText() string {
+	return "Hex string decoder"
+}

pkg/pencode/hexencoder.go

@@ -0,0 +1,15 @@
+package pencode
+
+import (
+	"encoding/hex"
+)
+
+type HexEncoder struct{}
+
+func (h HexEncoder) Encode(input []byte) ([]byte, error) {
+	return []byte(hex.EncodeToString(input)), nil
+}
+
+func (h HexEncoder) HelpText() string {
+	return "Hex string encoder"
+}

pkg/pencode/util.go

@@ -0,0 +1,17 @@
+package pencode
+
+import (
+	"strings"
+	"unicode"
+)
+
+func removeAllWhitespace(input string) string {
+	var b strings.Builder
+	b.Grow(len(input))
+	for _, ch := range input {
+		if !unicode.IsSpace(ch) {
+			b.WriteRune(ch)
+		}
+	}
+	return b.String()
+}