cotp

Zero-dependency Java library for COTP — printable 5×5 challenge-card authentication (Avatier-style analog). Deterministic HKDF/HMAC grid from a single server secret; one-time challenges, PIN, audit events, plus optional metrics/PDF/JDBC/Redis modules.

Pure Go COTP/ISO 8073 TP0 transport and X.224 TPDU codec over RFC 1006/TPKT. Client/server sessions, negotiation, and segmentation for S7comm and MMS.

Siemens S7comm CLI for PLC discovery, identification, memory read/write, block inspection, diagnostics, rack/slot probing, and PCAP decoding over ISO-on-TCP.

Pure Go Siemens S7comm protocol library for PLC communication over ISO-on-TCP. Supports memory read/write, device discovery, identification, diagnostics and block operations.

Pure Go TPKT framing library for RFC 1006/2126. Encode, decode and stream ISO transport packets for COTP, Siemens S7comm and MMS/IEC 61850 stacks.

cotp implementation of xmip-core-transport.