OSS Nokalva - OSS ASN.1 Tools For Java

OSS ASN.1/Java compiler
OSS Runtime library
Encoder/Decoder
Utilities
Standards Conformance

OSS ASN.1/Java Compiler - Fast, Flexible, Full Featured:

You can have it all - speed, flexibility, and a rich feature set. The OSS ASN.1/Java Compiler accepts one or more input files, each containing one or more ASN.1 modules. The OSS compiler is an executable, not interpreted, making it extremely fast. The compiler verifies the ASN.1 specification; and generates: informative diagnostic messages, Java classes for inclusion in your application, optional XSL stylesheets and/or DTD for XML encodings, and an optional ASN.1 output listing. The OSS compiler fully supports ASN.1:1990 including all macros as well as ASN.1:2002 including full support for contents constraints.

No matter what your application needs, a little or a lot, OSS provides it.The OSS compiler's features include generation of:

a simple directory structure.
Java instantiations of all ASN.1 values.
informative diagnostic messages for any invalid ASN.1. The OSS compiler makes every attempt to recover from errors. Giving you messages for each error encountered means fewer recompilations to correct an invalid spec.
only the Java classes (based on the ASN.1 types) that you select - modules, PDUs, metadata (i.e. tags, names, constraints). Your application is leaner, your development time is reduced.
all of what you do need. Our ASN.1/Java compiler is comprehensive - not a tag or constraint is left behind.

Does your application need to do automatic decoding? Handle multiple ASN.1 versions? Work in a multi-threading environment? Does your spec contain values, extensible types and information object sets? Then you need the the full featured OSS compiler. It generates valid Java code no matter what spec you use (H323, PKCS, RANAP, NBAP are just a few of the specs that our customers use that our compiler handles with no problem).

Special features enable the OSS compiler to

handle even the most unusual ASN.1 specifications that strain the JVM compiler limits.
work with third party IDEs such as emacs and Microsoft Visual Studio.
automate the sample application process enabling you to try out our tools quickly with a minimum of effort.
generate a batch or script file to facilitate Java compiling.

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OSS Runtime Library

Encoder/Decoder:

The encoder/decoder consists of a class called Coder of which the essential methods are encode() and decode(). Encode() takes data placed by your application program in the compiler-generated Java classes and converts it to a string of bytes encoded according to BER, PER (aligned or unaligned), DER, CER, XER, CXER, or E-XER. The method, decode(), takes a string of bytes that have been encoded according to BER, PER, DER, CER, XER, CXER, or E-XER and performs the inverse operation of the encoder, resulting in a Java object that you can easily manipulate.

Why Choose the OSS Java runtime? Let's look at the details:

unparalleled speed of encoders and decoders
backward compatibility guaranteed
large (1024 bit) INTEGERs (for cryptographic applications)
unlimited value size
type representations which reflect the semantics of ASN.1 (4 byte UniversalStrings, Time classes)
encoding of extensible types (unknown extensions)
improve your performance with optional customization of automatic decoding
automatic decoding for any kind of constraint
no implementation restrictions; never rewrite your ASN.1 to accommodate encoding limitations.
defer decoding of any individual field or type
file and socket support
concatenated PDU support
contents constraints (full support)

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Other Provided Runtime Utilities:

The OSS ASN.1 Tools contain many other runtime functions which make application development easier:

powerful, flexible diagnostic and recovery capabilities
methods for copying, and comparing decoded messages.
convenient mechanism for printing values of any type:

System.out.println(value);

custom printing capabilities - print it your way!
dynamically extend extensible information object sets
convert to/from binary/hex format.
debug BER encodings (OSSTLV)
debug PER encodings (ASN1-Step product)
JIA API - a way to access the data values without knowing the type of the data.

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Standards Conformance :

This powerful software conforms fully to ASN.1 standards listed below:

ITU-T X.680 (ISO/IEC 8824-1) - Abstract Syntax Notation One (ASN.1): Specification of Basic Notation
ITU-T X.681 (ISO/IEC 8824-2) - Abstract Syntax Notation One (ASN.1): Information Object Specification
ITU-T X.682 (ISO/IEC 8824-3) - Abstract Syntax Notation One (ASN.1): Constraint Specification
ITU-T X.683 (ISO/IEC 8824-4) - Abstract Syntax Notation One (ASN.1): Parameterization of ASN.1 Specifications
ITU-T X.690 (ISO/IEC 8825-1) - ASN.1 Encoding Rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER)
ITU-T X.691 (ISO/IEC 8825-2) - ASN.1 Encoding Rules: Specification of Packed Encoding Rules (PER)
ITU-T X.692 (ISO/IEC 8825-3) - ASN.1 Encoding Rules: Specification of Encoding Control Notation (ECN)
ITU-T X.693 (ISO/IEC 8825-4) - ASN.1 Encoding Rules: Specification of XML Encoding Rules (XER). This includes Canonical XML Encoding Rules (CXER) specification.

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