go-asn1

Compiled ASN.1 specifications as native Go packages with generated marshal/unmarshal codecs.

Installation

go get github.com/gomaja/go-asn1

Usage

import "github.com/gomaja/go-asn1/telecom/lte/x2ap"

// Decode an X2AP PDU from APER bytes
var pdu x2ap.X2APPDU
err := pdu.UnmarshalAPER(data)

// Re-encode (byte-exact round-trip)
encoded, err := pdu.MarshalAPER()

Available Protocols

Protocols marked with [compiled] have generated Go code. Others have placeholder directories ready for future compilation.

telecom/ — Telecommunications

telecom/lte/ — 3GPP LTE (4G)

Package	Spec	Interface	Encoding	Status
lte/s1ap	S1AP	S1 (eNB ↔ MME)	APER	[compiled]
lte/x2ap	X2AP	X2 (eNB ↔ eNB)	APER	[compiled]
lte/rrc	LTE-RRC	Uu (UE ↔ eNB)	UPER	[compiled]
lte/m2ap	M2AP	M2 (MCE ↔ eNB)	APER	planned
lte/m3ap	M3AP	M3 (MCE ↔ MME)	APER	planned
lte/lpp	LPP	LTE-Uu (UE ↔ E-SMLC)	—	planned
lte/lppa	LPPa	SLs (eNB ↔ E-SMLC)	APER	planned
lte/lppe	LPPe	LTE-Uu (UE ↔ location server)	—	planned
lte/lcsap	LCS-AP	SLg (MME ↔ E-SMLC)	APER	planned
lte/sabp	SABP	Iu-BC (RNC ↔ CBC)	APER	planned
lte/sbc_ap	SBc-AP	SBc (MME ↔ CBC)	APER	planned
lte/pcap	PCAP	Iupc (RNC ↔ SAS)	APER	planned

telecom/nr/ — 3GPP NR (5G)

Package	Spec	Interface	Encoding	Status
nr/ngap	NGAP	NG (gNB ↔ AMF)	APER	planned
nr/xnap	XnAP	Xn (gNB ↔ gNB)	APER	planned
nr/e1ap	E1AP	E1 (CU-CP ↔ CU-UP)	APER	planned
nr/e2ap	E2AP	E2 (near-RT RIC ↔ RAN)	APER	planned
nr/f1ap	F1AP	F1 (CU ↔ DU)	APER	planned
nr/rrc	NR-RRC	NR-Uu (UE ↔ gNB)	UPER	planned
nr/nrppa	NRPPa	NRPPa (gNB ↔ LMF)	APER	planned
nr/kpm_v2	KPM v2	E2 (O-RAN KPM service)	—	planned
nr/rc_v3	RC v3	E2 (O-RAN RC service)	—	planned

telecom/umts/ — 3GPP UMTS (3G)

Package	Spec	Interface	Encoding	Status
umts/ranap	RANAP	Iu (RNC ↔ CN)	APER	planned
umts/rnsap	RNSAP	Iur (RNC ↔ RNC)	APER	planned
umts/rrc	UMTS-RRC	Uu (UE ↔ Node B)	UPER	planned
umts/hnbap	HNBAP	Iuh (HNB ↔ HNB-GW)	APER	planned
umts/rua	RUA	Iuh (HNB ↔ HNB-GW)	APER	planned
umts/nbap	NBAP	Iub (Node B ↔ RNC)	APER	planned
umts/sabp	SABP	Iu-BC (RNC ↔ CBC)	APER	planned

telecom/gsm/ — 2G

Package	Spec	Interface	Status
gsm/rrlp	RRLP	Um (MS ↔ SMLC)	planned

telecom/ss7/ — SS7 / Intelligent Network

Package	Spec	Interface	Encoding	Status
ss7/tcap	TCAP	MTP3/SCCP (transaction layer)	BER	[compiled]
ss7/ansi_tcap	ANSI TCAP	MTP3/SCCP (ANSI variant)	BER	planned
ss7/gsm_map	GSM MAP	C/D/E/Gr (HLR/VLR/MSC)	BER	[compiled]
ss7/camel	CAMEL	gsmSSF ↔ gsmSCF	BER	planned
ss7/inap	INAP	SSF ↔ SCF (IN CS-1/CS-2)	BER	planned
ss7/ain	AIN	SSP ↔ SCP (N. America)	BER	planned
ss7/charging_ase	Charging ASE	CAP/MAP (charging extension)	BER	planned
ss7/ros	ROS	— (Remote Operations base)	BER	planned
ss7/ansi_map	ANSI MAP	A/B/D (IS-41 ANSI variant)	BER	planned
ss7/isdn_sup	ISDN supplementary	DSS1 (Q.931/Q.932)	BER	planned
ss7/q932	Q.932	DSS1 (generic procedures)	BER	planned
ss7/q932_ros	Q.932 ROS	DSS1 (facility IE)	BER	planned
ss7/qsig	QSIG	QSIG (PBX ↔ PBX)	BER	planned
ss7/lnpdqp	LNPDQP	NPDB (number portability query)	BER	planned

telecom/esim/ — eSIM Provisioning

Package	Spec	Interface	Status
esim/sgp22	SGP.22	ES9+ (LPA ↔ SM-DP+)	planned
esim/sgp32	SGP.32	ES2+ (SM-DP+ ↔ SM-DS, IoT)	planned

telecom/li/ — Lawful Interception

Package	Spec	Interface	Status
li/HI2Operations	HI2	HI2 (MF ↔ LEMF)	planned
li/lix2	LI-X2	X2 (IRI-POI ↔ MF)	planned

telecom/charging/ — 3GPP Charging

Package	Spec	Interface	Status
charging/gprscdr	GPRS CDR	Ga (CDF ↔ CGF)	planned

telecom/atn/ — Aeronautical Telecommunications

Package	Spec	Interface	Status
atn/atn_cm	ATN Context Management	air-ground (aircraft ↔ ATC)	planned
atn/atn_cpdlc	ATN CPDLC	air-ground (pilot ↔ controller)	planned
atn/atn_ulcs	ATN Upper Layer	air-ground (ATN upper layer)	planned

telecom/tetra/ — TETRA

Package	Spec	Interface	Status
tetra/tetra	TETRA	Um (MS ↔ SwMI)	planned

security/ — Security & PKI

security/x509/ — X.509 & Certificate Extensions

Package	Spec	Status
x509/x509af	X.509 Authentication Framework	planned
x509/x509ce	X.509 Certificate Extensions	planned
x509/x509if	X.509 Information Framework	planned
x509/x509sat	X.509 Selected Attribute Types	planned
x509/pkix1explicit	PKIX1 Explicit	planned
x509/pkix1implicit	PKIX1 Implicit	planned
x509/pkixac	PKIX Attribute Certificate	planned
x509/pkixalgs	PKIX Algorithms	planned
x509/pkixproxy	PKIX Proxy Certificate	planned
x509/pkixqualified	PKIX Qualified Certificates	planned
x509/pkixtsp	PKIX Timestamp	planned
x509/pkcs10	PKCS#10 (CSR)	planned
x509/pkcs12	PKCS#12 (key store)	planned
x509/ocsp	OCSP	planned
x509/logotypecertextn	Logotype Certificate Ext	planned
x509/wlancertextn	WLAN Certificate Ext	planned
x509/ns_cert_exts	Netscape Certificate Ext	planned
x509/cbrs_oids	CBRS OIDs	planned
x509/nist_csor	NIST CSOR	planned
x509/novell_pkis	Novell PKIS	planned
x509/tcg_cp_oids	TCG CP OIDs	planned

security/cms/ — Cryptographic Message Syntax

Package	Spec	Status
cms/cms	CMS (RFC 5652)	planned
cms/ess	ESS (RFC 2634)	planned
cms/cmp	CMP (RFC 4210)	planned
cms/crmf	CRMF (RFC 4211)	planned

security/auth/ — Authentication

Package	Spec	Status
auth/kerberos	Kerberos (RFC 4120)	planned
auth/pkinit	PKINIT	planned
auth/spnego	SPNEGO	planned
auth/credssp	CredSSP	planned

directory/ — X.500 / LDAP

Package	Spec	Interface	Status
directory/ldap	LDAP	TCP/IP (client ↔ directory)	planned
directory/dap	DAP	DUA ↔ DSA	planned
directory/dsp	DSP	DSA ↔ DSA (chaining)	planned
directory/disp	DISP	DSA ↔ DSA (shadow replication)	planned
directory/dop	DOP	DSA ↔ DSA (operational binding)	planned
directory/x721	X.721	manager ↔ agent (managed objects)	planned

voip/ — Voice over IP (H.323 family)

Package	Spec	Interface	Status
voip/h225	H.225	RAS: EP ↔ GK; Q.931: EP ↔ EP	planned
voip/h235	H.235	— (security framework for H.323)	planned
voip/h245	H.245	EP ↔ EP (media control channel)	planned
voip/h248	H.248/Megaco	MGC ↔ MG (media gateway control)	planned
voip/h282	H.282	FECC (far-end camera control)	planned
voip/h283	H.283	LCT (logical channel transport)	planned
voip/h323	H.323	— (umbrella signaling)	planned
voip/h450	H.450	EP ↔ EP (supplementary services)	planned
voip/h450_ros	H.450 ROS	EP ↔ EP (remote operations)	planned
voip/h460	H.460	EP ↔ GK (NAT/firewall traversal)	planned
voip/h501	H.501	PE ↔ PE (address resolution)	planned
voip/t124	T.124	GCC (conference control)	planned
voip/t125	T.125	MCS (multipoint communication)	planned
voip/t38	T.38	GW ↔ GW (fax over IP)	planned

network/ — Network Management

Package	Spec	Interface	Status
network/snmp	SNMP	manager ↔ agent (UDP/161)	planned
network/cmip	CMIP	manager ↔ agent (OSI stack)	planned

messaging/ — X.400 Messaging

Package	Spec	Interface	Status
messaging/p1	P1	MTA ↔ MTA (message transfer)	planned
messaging/p7	P7	UA ↔ MS (message store access)	planned
messaging/p22	P22	UA ↔ UA (interpersonal messaging)	planned
messaging/p772	P772	MMHS (military messaging)	planned
messaging/smrse	SMRSE	SMSC ↔ SMSC (SMS relay)	planned

osi/ — OSI Protocols

Package	Spec	Interface	Status
osi/acse	ACSE	— (association control, layer 7)	planned
osi/pres	Presentation Layer	— (OSI layer 6)	planned
osi/rtse	RTSE	— (reliable transfer, layer 7)	planned
osi/ftam	FTAM	— (file transfer, layer 7)	planned

transport/ — Transport & Location

Package	Spec	Interface	Status
transport/ieee1609dot2	IEEE 1609.2	DSRC/C-V2X (V2X security)	planned
transport/its	ITS	ETSI ITS-G5 (vehicle ↔ infra)	planned
transport/ulp	ULP	SET ↔ SLP (SUPL user plane)	planned
transport/ilp	ILP	SPC ↔ SLC (SUPL internal)	planned

energy/ — Power Grid (IEC 61850)

Package	Spec	Interface	Status
energy/goose	GOOSE	IED ↔ IED (multicast events)	planned
energy/sv	Sampled Values	MU ↔ IED (multicast samples)	planned
energy/mms	MMS	client ↔ server (IEC 61850 MMS)	planned

metering/ — Smart Metering

Package	Spec	Interface	Status
metering/cosem	DLMS/COSEM	client ↔ meter (smart metering)	planned

other/ — Miscellaneous

Package	Spec	Status
other/z3950	Z39.50 (library search)	planned
other/c1222	C12.22 (metering)	planned
other/cdt	CDT	planned
other/gdt	GDT	planned
other/glow	Ember+ Glow	planned
other/akp	AKP	planned
other/acp133	ACP 133 (military dir)	planned
other/idmp	IDMP	planned
other/mpeg_audio	MPEG Audio	planned
other/mpeg_pes	MPEG PES	planned
other/mudurl	MUD URL	planned
other/llc_v1	LLC v1	planned

Encoding Rules

Encoding	Description	Used by
APER	Aligned PER	S1AP, X2AP, NGAP, RANAP, and most 3GPP signaling
UPER	Unaligned PER	LTE-RRC, NR-RRC, and radio interface protocols
BER/DER	Basic/Distinguished Encoding Rules	TCAP, MAP, CAMEL, X.509, LDAP, SNMP
OER	Octet Encoding Rules	Some ITS specs

License

MIT