func (msg *MessageV3) Marshal() (b []byte, err error) {
var buf []byte
raw := asn1.RawValue{Class: asn1.ClassUniversal, Tag: asn1.TagSequence, IsCompound: true}
buf, err = asn1.Marshal(msg.version)
if err != nil {
return
}
raw.Bytes = buf
buf, err = msg.globalDataV3.Marshal()
if err != nil {
return
}
raw.Bytes = append(raw.Bytes, buf...)
buf, err = msg.securityParameterV3.Marshal()
if err != nil {
return
}
raw.Bytes = append(raw.Bytes, buf...)
// if 0 == len(msg.pduBytes) {
// panic("pdu bytes is empty.")
// }
raw.Bytes = append(raw.Bytes, msg.pduBytes...)
return asn1.Marshal(raw)
}
func encrypt(msg *MessageV3, proto PrivProtocol, key []byte) (err error) {
var dst, priv []byte
src := msg.PduBytes()
switch proto {
case Des:
dst, priv, err = EncryptDES(src, key, int32(msg.AuthEngineBoots), genSalt32())
case Aes:
dst, priv, err = EncryptAES(
src, key, int32(msg.AuthEngineBoots), int32(msg.AuthEngineTime), genSalt64())
default:
err = errors.New("'" + fmt.Sprint(proto) + "' is unsupported crypto.")
}
if err != nil {
return
}
raw := asn1.RawValue{Class: asn1.ClassUniversal, Tag: asn1.TagOctetString, IsCompound: false}
raw.Bytes = dst
dst, err = asn1.Marshal(raw)
if err == nil {
msg.SetPduBytes(dst)
msg.PrivParameter = priv
}
return
}
func (msg *MessageV1) Marshal() (b []byte, err error) {
var buf []byte
raw := asn1.RawValue{Class: asn1.ClassUniversal, Tag: asn1.TagSequence, IsCompound: true}
buf, err = asn1.Marshal(msg.version)
if err != nil {
return
}
raw.Bytes = append(raw.Bytes, buf...)
buf, err = asn1.Marshal(msg.Community)
if err != nil {
return
}
raw.Bytes = append(raw.Bytes, buf...)
raw.Bytes = append(raw.Bytes, msg.pduBytes...)
return asn1.Marshal(raw)
}
func (sec *securityParameterV3) Marshal() ([]byte, error) {
raw := asn1.RawValue{Class: asn1.ClassUniversal, Tag: asn1.TagOctetString, IsCompound: false}
buf, err := asn1.Marshal(*sec)
if err != nil {
return nil, err
}
raw.Bytes = buf
return asn1.Marshal(raw)
}
func (v *VariableBinding) Marshal() (b []byte, err error) {
var buf []byte
raw := asn1.RawValue{Class: asn1.ClassUniversal, Tag: asn1.TagSequence, IsCompound: true}
if v.Variable == nil {
return asn1.Marshal(raw)
}
buf, err = v.Oid.Marshal()
if err != nil {
return
}
raw.Bytes = buf
buf, err = v.Variable.Marshal()
if err != nil {
return
}
raw.Bytes = append(raw.Bytes, buf...)
return asn1.Marshal(raw)
}
func (pdu *ScopedPdu) Marshal() (b []byte, err error) {
var buf []byte
raw := asn1.RawValue{Class: asn1.ClassUniversal, Tag: asn1.TagSequence, IsCompound: true}
buf, err = asn1.Marshal(pdu.ContextEngineId)
if err != nil {
return
}
raw.Bytes = buf
buf, err = asn1.Marshal(pdu.ContextName)
if err != nil {
return
}
raw.Bytes = append(raw.Bytes, buf...)
buf, err = pdu.PduV1.Marshal()
if err != nil {
return
}
raw.Bytes = append(raw.Bytes, buf...)
return asn1.Marshal(raw)
}
func (pdu *PduV1) Marshal() (b []byte, err error) {
var buf []byte
raw := asn1.RawValue{Class: asn1.ClassContextSpecific, Tag: int(pdu.pduType), IsCompound: true}
if Trap == pdu.pduType {
buf, err = pdu.Enterprise.Marshal()
if err != nil {
return
}
raw.Bytes = buf
buf, err = pdu.AgentAddress.Marshal()
if err != nil {
return
}
raw.Bytes = append(raw.Bytes, buf...)
buf, err = asn1.Marshal(pdu.GenericTrap)
if err != nil {
return
}
raw.Bytes = append(raw.Bytes, buf...)
buf, err = asn1.Marshal(pdu.SpecificTrap)
if err != nil {
return
}
raw.Bytes = append(raw.Bytes, buf...)
buf, err = asn1.Marshal(pdu.Timestamp)
if err != nil {
return
}
raw.Bytes = append(raw.Bytes, buf...)
} else {
buf, err = asn1.Marshal(pdu.requestId)
if err != nil {
return
}
raw.Bytes = buf
buf, err = asn1.Marshal(pdu.errorStatus)
if err != nil {
return
}
raw.Bytes = append(raw.Bytes, buf...)
buf, err = asn1.Marshal(pdu.errorIndex)
if err != nil {
return
}
raw.Bytes = append(raw.Bytes, buf...)
}
VariableBindings := asn1.RawValue{Class: asn1.ClassUniversal, Tag: asn1.TagSequence, IsCompound: true}
for i := 0; i < len(pdu.variableBindings); i++ {
buf, err = pdu.variableBindings[i].Marshal()
if err != nil {
return
}
VariableBindings.Bytes = append(VariableBindings.Bytes, buf...)
}
buf, err = asn1.Marshal(VariableBindings)
if err != nil {
return
}
raw.Bytes = append(raw.Bytes, buf...)
return asn1.Marshal(raw)
}