asn1 — asn1 encoding rules tachograph-go, community, asn1 encoding rules, ide skills, tachograph file format, asn1 Go SDK, asn1 install, Claude Code, Cursor, Windsurf

v1.0.0
GitHub

About this Skill

Ideal for AI Agents working with tachograph data, requiring expertise in Abstract Syntax Notation One (ASN.1) and its encoding rules (BER/DER). asn1 is a set of encoding rules for Abstract Syntax Notation One (ASN.1), used for encoding data in tachograph files, including BER and DER formats.

Features

Supports BER and DER encoding rules
Provides a Go SDK for tachograph (.DDD) files
Includes reference material for Universal Tags, such as BOOLEAN and INTEGER
Enables working with SEQUENCE and SET data types
Allows encoding of PrintableString and T61String types
Supports IA5String and UTCTime data types

# Core Topics

asn1 encoding rules tachograph file format asn1 Go SDK asn1 install
way-platform way-platform
[8]
[2]
Updated: 2/24/2026

Agent Capability Analysis

The asn1 skill by way-platform is an open-source community AI agent skill for Claude Code and other IDE workflows, helping agents execute tasks with better context, repeatability, and domain-specific guidance. Optimized for asn1 encoding rules, tachograph file format, asn1 Go SDK.

Ideal Agent Persona

Ideal for AI Agents working with tachograph data, requiring expertise in Abstract Syntax Notation One (ASN.1) and its encoding rules (BER/DER).

Core Value

Empowers agents to decode and encode tachograph (.DDD) files using ASN.1, leveraging its encoding rules such as Basic Encoding Rules (BER) and Distinguished Encoding Rules (DER), to work with data types like BOOLEAN, INTEGER, and OBJECT IDENTIFIER.

↓ Capabilities Granted for asn1

Decoding tachograph files for data analysis
Generating ASN.1 encoded data for tachograph files
Validating BER and DER encoded data

! Prerequisites & Limits

  • Requires understanding of ASN.1 and its encoding rules
  • Limited to working with tachograph (.DDD) files
Labs Demo

Browser Sandbox Environment

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Boot Container Sandbox

asn1

Install asn1, an AI agent skill for AI agent workflows and automation. Works with Claude Code, Cursor, and Windsurf with one-command setup.

SKILL.md
Readonly

ASN.1, BER, and DER

This skill provides reference material for Abstract Syntax Notation One (ASN.1) and its encoding rules (BER/DER).

Quick Reference

Universal Tags

Tag (Hex)Type
01BOOLEAN
02INTEGER
03BIT STRING
04OCTET STRING
05NULL
06OBJECT IDENTIFIER
10SEQUENCE / SEQUENCE OF
11SET / SET OF
13PrintableString
14T61String
16IA5String
17UTCTime

Identifier Octet (First Byte)

Bits 8-7: Class

  • 00: Universal
  • 01: Application
  • 10: Context-specific
  • 11: Private

Bit 6: PC (Primitive/Constructed)

  • 0: Primitive (Value is directly in contents)
  • 1: Constructed (Contents are nested TLV elements)

Bits 5-1: Tag Number (if < 31)

Detailed Guide

For a comprehensive guide on notation, encoding rules, and specific type handling, read the bundled reference:

references/guide.md

Contents of the Guide:

  1. Introduction: Overview of OSI, ASN.1, BER, DER.
  2. ASN.1 Notation: Simple types, structured types, tagging.
  3. BER: Primitive vs. Constructed, Definite vs. Indefinite length.
  4. DER: subset of BER for unique encoding (Canonical).
  5. Type-Specific Encodings: Detailed breakdown of how to encode INTEGER, BIT STRING, SEQUENCE, etc.
  6. Example: Walkthrough of an X.500 Name encoding.

Common Operations

Deciphering a Tag

If you encounter byte 0x30:

  • Binary: 0011 0000
  • Class: 00 (Universal)
  • P/C: 1 (Constructed)
  • Tag: 10000 (16 -> SEQUENCE)

If you encounter byte 0xA0:

  • Binary: 1010 0000
  • Class: 10 (Context-specific)
  • P/C: 1 (Constructed)
  • Tag: 00000 (0 -> [0])

Variable Lengths

  • Short Form: 0x00 - 0x7F (0-127 bytes).
  • Long Form: Bit 8 is 1. Bits 7-1 = number of length bytes following.
    • Example: 0x81 0x80 -> Length is in next 1 byte (0x81), value is 0x80 (128).
    • Example: 0x82 0x01 0x00 -> Length is in next 2 bytes (0x82), value is 0x0100 (256).

FAQ & Installation Steps

These questions and steps mirror the structured data on this page for better search understanding.

? Frequently Asked Questions

What is asn1?

Ideal for AI Agents working with tachograph data, requiring expertise in Abstract Syntax Notation One (ASN.1) and its encoding rules (BER/DER). asn1 is a set of encoding rules for Abstract Syntax Notation One (ASN.1), used for encoding data in tachograph files, including BER and DER formats.

How do I install asn1?

Run the command: npx killer-skills add way-platform/tachograph-go/asn1. It works with Cursor, Windsurf, VS Code, Claude Code, and 19+ other IDEs.

What are the use cases for asn1?

Key use cases include: Decoding tachograph files for data analysis, Generating ASN.1 encoded data for tachograph files, Validating BER and DER encoded data.

Which IDEs are compatible with asn1?

This skill is compatible with Cursor, Windsurf, VS Code, Trae, Claude Code, OpenClaw, Aider, Codex, OpenCode, Goose, Cline, Roo Code, Kiro, Augment Code, Continue, GitHub Copilot, Sourcegraph Cody, and Amazon Q Developer. Use the Killer-Skills CLI for universal one-command installation.

Are there any limitations for asn1?

Requires understanding of ASN.1 and its encoding rules. Limited to working with tachograph (.DDD) files.

↓ How To Install

  1. 1. Open your terminal

    Open the terminal or command line in your project directory.

  2. 2. Run the install command

    Run: npx killer-skills add way-platform/tachograph-go/asn1. The CLI will automatically detect your IDE or AI agent and configure the skill.

  3. 3. Start using the skill

    The skill is now active. Your AI agent can use asn1 immediately in the current project.

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