bouncycastle

1. https://www.bouncycastle.org/

2. The Bouncy Castle APIs currently consist of the following:

   • A lightweight cryptography API for Java and C#.

   • A provider for the Java Cryptography Extension and the Java Cryptography Architecture.

   • A clean room implementation of the JCE 1.2.1.

   • A library for reading and writing encoded ASN.1 objects.

   • Lightweight APIs for TLS (RFC 2246, RFC 4346) and DTLS (RFC 4347).

   • Generators for Version 1 and Version 3 X.509 certificates, Version 2 CRLs, and PKCS12 files.

   • Generators for Version 2 X.509 attribute certificates.

   • Generators/Processors for S/MIME and CMS (PKCS7/RFC 3852).

   • Generators/Processors for OCSP (RFC 2560).

   • Generators/Processors for TSP (RFC 3161 & RFC 5544).

   • Generators/Processors for CMP and CRMF (RFC 4210 & RFC 4211).

   • Generators/Processors for OpenPGP (RFC 4880).

   • Generators/Processors for Extended Access Control (EAC).

   • Generators/Processors for Data Validation and Certification Server (DVCS) - RFC 3029.

   • A signed jar version suitable for JDK 1.4-1.7 and the Sun JCE.

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bouncycastle

原文：http://www.cnblogs.com/dmdj/p/3835783.html