asn1

PHP Secure Communications Library

A native implementation of TLS in Javascript and tools to write crypto-based and network-heavy webapps

CAUTION: END OF SUPPORT ON 14 AUG 2026. The 'jsrsasign' (RSA-Sign JavaScript Library) is an opensource free cryptography library supporting RSA/RSAPSS/ECDSA/DSA signing/validation, ASN.1, PKCS#1/5/8 private/public key, X.509 certificate, CRL, OCSP, CMS SignedData, TimeStamp, CAdES and JSON Web Signature/Token in pure JavaScript.

Reading and Validating In App Purchase Receipt Locally.

JavaScript generic ASN.1 parser

SM2/SM3/SM4/ECDH crypto library based on OpenSSL.

A Safe #[no_std] ASN.1 Codec Framework

Python ASN.1 library with a focus on performance and a pythonic API

ASN.1 parsing, encoding and decoding.

ASN1js is a pure JavaScript library implementing a full ASN.1 BER decoder and encoder.

en-crypt, de-crypt, si-gn, ve-rify - smime, pdf, xades and plain files in pure python

Graphical WPF-based Abstract Syntax Notation One (ASN.1) DER editor

Kotlin Multiplatform Crypto/PKI/ASN.1 Library with Attestation and Hardware-Backed Crypto Support on Mobile

An implementation of ASN.1 for Swift

A PHP library to encode and decode arbitrary ASN.1 structures using ITU-T X.690 encoding rules.

Avrotize is a command-line tool for converting data structure definitions between different schema formats, using Apache Avro Schema as the integration schema model.

ASN1bean (formerly known as jASN1) is a Java ASN.1 BER and DER encoding/decoding library

ETSI ITS G5 GeoNetworking stack, in Java: CAM-DENM / ASN.1 PER / BTP / GeoNetworking

A Python library to ease the development of encoders and decoders for various protocols and file formats, especially telecom ones. Provides an ASN.1 compiler and a CSN.1 runtime.

BER/DER parser written in pure Rust. Fast, zero-copy, safe.