jsrsasign
opensource free pure JavaScript cryptographic library supports RSA/RSAPSS/ECDSA/DSA signing/validation, ASN.1, PKCS#1/5/8 private/public key, X.509 certificate, CRL, OCSP, CMS SignedData, TimeStamp and CAdES and JSON Web Signature(JWS)/Token(JWT)/Key(JWK)
pkijs
Public Key Infrastructure (PKI) is the basis of how identity and key management is performed on the web today. PKIjs is a pure JavaScript library implementing the formats that are used in PKI applications. It is built on WebCrypto and aspires to make it p
easy-ocsp
An easy-to-use OCSP client for Node.js
x500-ts
X.500 Directory / X.509 PKI Certificates and CRLs
uasn1
An insanely minimal ASN.1 builder for X.509 common schemas, specifically SEC1/X9.62 PKCS#8, SPKI/PKIX, PKCS#1 and CSR.