CMS Packages

org.bouncycastle.cms	A package for processing RFC 3852 Cryptographic Message Syntax (CMS) objects - also referred to as PKCS#7 (formerly RFC 2630, 3369).
org.bouncycastle.cms.bc
org.bouncycastle.cms.jcajce
org.bouncycastle.cms.test	Regression tests for the org.bouncycastle.cms package.

S/MIME Packages

org.bouncycastle.mail.smime	High level classes for dealing with S/MIME objects (RFC 3851).
org.bouncycastle.mail.smime.examples	Example code demonstrating the use of the S/MIME package for a variety of uses.
org.bouncycastle.mail.smime.handlers	S/MIME handlers for the JavaMail API.
org.bouncycastle.mail.smime.test	Regression tests for the org.bouncycastle.mail.smime package.
org.bouncycastle.mail.smime.util
org.bouncycastle.mail.smime.validator

Certificate Packages

org.bouncycastle.cert	Basic support package for handling and creating X.509 certificates, CRLs, and attribute certificates.
org.bouncycastle.cert.cmp	Basic support package for handling and creating CMP (RFC 4210) certificate management messages.
org.bouncycastle.cert.cmp.test
org.bouncycastle.cert.crmf	Basic support package for handling and creating CRMF (RFC 4211) certificate request messages.
org.bouncycastle.cert.crmf.jcajce	JCA extensions to the CRMF online certificate request package.
org.bouncycastle.cert.crmf.test
org.bouncycastle.cert.jcajce	JCA extensions to the certificate building and processing package.
org.bouncycastle.cert.ocsp	Basic support package for handling and creating OCSP (RFC 2560) online certificate status requests.
org.bouncycastle.cert.ocsp.jcajce	JCA extensions to the OCSP online certificate status package.
org.bouncycastle.cert.ocsp.test
org.bouncycastle.cert.selector	Specialised Selector classes for certificates, CRLs, and attribute certificates.
org.bouncycastle.cert.test

PKCS Packages

org.bouncycastle.pkcs	Basic support package for handling and creating PKCS#10 certification requests and other PKCS objects.
org.bouncycastle.pkcs.jcajce	JCA extensions to the PKCS#10 certification request package.

Other Packages

org.bouncycastle.operator	Basic operators for doing encryption, signing, and digest operations.
org.bouncycastle.operator.bc
org.bouncycastle.operator.jcajce