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ASN.1

The Abstract Syntax Notation One (ASN.1), defined by the ISO standard ISO 8824/ITU X.208, specifies a language for describing data structures in an abstract and platform independent manner. IAIK-JCE supports all essential basic - simple and constructed - ASN.1 types:

BOOLEAN
INTEGER
BITSTRING
OCTETSTRING
NULL
OBJECTIDENTIFIER
ENUMERATED
SEQUENCE
SET
SEQUENCE OF
SET OF
UTCTime
GeneralizedTime
all essential String types

IAIK-JCE provides the functionality for properly handling private, context-specific and application dependent types, as well as the pre-defined standard types.

Several en/decoding utilities support mechanisms for DER, Base64, and PEM en/decoding ASN.1 structures that may be implemented as Java™ classes. For avoiding memory problems ASN.1 structures may be written or parsed to/from their encodings in stream based manner.

IAK-JCE includes a library of pre-built ASN.1 structures to be used for application protocols like PKCS or X.509