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.

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• Updated Oct 30, 2026
• HTML

Drop-in replacement for Requests. Automatic HTTP/1.1, HTTP/2, and HTTP/3. WebSocket, and SSE included. WASI Supported.

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• Updated Nov 9, 2026
• Python

PKI.js is a pure JavaScript library implementing the formats that are used in PKI applications (signing, encryption, certificate requests, OCSP and TSP requests/responses). It is built on WebCrypto (Web Cryptography API) and requires no plug-ins.

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• Updated Nov 5, 2026
• TypeScript

XiPKI: Compact open source PKI (CA, OCSP responder, certificate protocols ACME, CMP, EST, SCEP), with full support of PQC MLDSA (Dilithium) and MLKEM (Kyber).

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• Updated Nov 9, 2026
• Java

The Dogtag Certificate System is an enterprise-class Certificate Authority (CA) which supports all aspects of certificate lifecycle management, including key archival, OCSP and smartcard management.

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• Updated Nov 12, 2026
• Java

Cross-platform PDF digital signing tool. JavaFX desktop UI with drag-to-place visible signatures, PKCS#11/PKCS#12 keystores, RFC 3161 timestamping, OCSP/CRL long-term validation, and a scriptable CLI.

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• Updated Nov 12, 2026
• Java

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

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• Updated Jul 18, 2026
• Python

⭐ Приложение-сервер для работы с Электронно Цифровой Подписью (ЭЦП) РК

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• Updated Oct 20, 2026
• Java

Sockets with pure VB6 impl of TLS encryption

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• Updated Oct 8, 2026
• Visual Basic 6.0

Something could be public patches

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• Updated Jul 16, 2026

Self-hosted certificate authority with a web UI: ACME, SCEP, EST, OCSP, CRL, TSA, SSH CA, Windows autoenrollment, network discovery, post-quantum ML-DSA and a FIPS build.

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• Updated Nov 12, 2026
• Python

A TLS certificate authority with CRL, OCSP, HSM and ACMEv2 support and more.

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• Updated Nov 7, 2026
• Python

🐳 VMs are bloat. Dockerise your VAPT environment

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• Updated Apr 19, 2025
• Shell

wolfSSL JSSE provider and JNI wrapper for SSL/TLS, supporting up to TLS 1.3!

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• Updated Nov 11, 2026
• Java

OCSP responder for Hashicorp Vault PKI

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• Updated May 13, 2022
• Go

An implementation of TLS and related specifications in Common Lisp

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• Updated Sep 23, 2023
• Common Lisp

Easy-to-use high-level library for PKI-enabled applications

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• Updated Sep 3, 2024
• C

NodePKI is a simple NodeJS based PKI manager for small corporate environments.

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• Updated May 14, 2018
• JavaScript

Multi-level Certificate Authority Management tool, front-end tool to OpenSSL, written in bash shell.

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• Updated Jun 6, 2022
• C

OCSPChecker provides an automated means to check the OCSP revocation status for a x509 digital certificate.

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• Updated Nov 3, 2026
• Python