initial commit

protocol/auth_challenge_response.go

@@ -0,0 +1,39 @@
+package protocol
+
+import (
+	"fmt"
+	"strings"
+)
+
+type AuthChallengeResponsePDU struct {
+	From              string `validate:"required,alphanum,max=7"`
+	To                string `validate:"required,alphanum,max=7"`
+	ChallengeResponse string `validate:"required,hexadecimal,md5"`
+}
+
+func (p *AuthChallengeResponsePDU) Serialize() string {
+	return fmt.Sprintf("$ZR%s:%s:%s%s", p.From, p.To, p.ChallengeResponse, PacketDelimeter)
+}
+
+func ParseAuthChallengeResponsePDU(rawPacket string) (*AuthChallengeResponsePDU, error) {
+	rawPacket = strings.TrimSuffix(rawPacket, PacketDelimeter)
+	rawPacket = strings.TrimPrefix(rawPacket, "$ZR")
+	fields := strings.Split(rawPacket, Delimeter)
+
+	if len(fields) != 3 {
+		return nil, NewGenericFSDError(SyntaxError)
+	}
+
+	pdu := AuthChallengeResponsePDU{
+		From:              fields[0],
+		To:                fields[1],
+		ChallengeResponse: fields[2],
+	}
+
+	err := V.Struct(pdu)
+	if err != nil {
+		return nil, NewGenericFSDError(SyntaxError)
+	}
+
+	return &pdu, nil
+}