[][src]Crate bsn1

bsn1 treats 'ASN.1.'

What is ASN.1?

ASN.1 stands for 'Abstruct Syntax Notation One' and X.690 is an 'ITU-T' standard specifying the following ASN.1 encording formats.

This crate supports BER and DER so far.

ASN.1 formats resembles 'JSON' in some ways, because they both are about serializing structured data, however, they differs in the following points.

ASN.1 has been used all over the world for a long time and very stable. For example, 'Transport Layer Security (TLS, SSL)', 'Lightweight Directory Access Protocol (LDAP)', '4th Generation Mobile Communication System (4G)', and so on.

See 'X.690 (07/2002)' for details.

Feature of bsn1

bsn1 treats user defined data as well as universal data types; while most other rust crates can treat only universal data.

To be accurate, there are 4 classes in ASN.1; universal class, application class, context specific class, and private class. bsn1 knows all of them.

Modules

contents

Provides functions to serialize/deserialize contents octets.

Macros

constructed_ber

Builds a Ber instance representing Constructed BER effectively.

constructed_der

Builds a Der instance representing 'Constructed DER' effectively.

Structs

Ber

Ber owns BerRef and represents a BER.

BerBuilder

BerBuilder is a struct to build Ber effectively.

BerRef

BerRef is a wrapper of [u8] and represents a BER.

Der

Der owns DerRef and represents DER.

DerBuilder

DerBuilder is a struct to build Der effectively.

DerRef

DerRef is a wrapper of [u8] and represents DER.

Id

Id owns IdRef and represents Identifier.

IdRef

IdRef is a wrapper of [u8] represents Identifier.

Enums

ClassTag

ClassTag represents Tag class of identifier.

Error

Errors for this crate.

Length

Length represents ASN.1 length.

PCTag

PCTag represents Private/Constructed flag of identifier.

Functions

length_to_bytes

Serializes length .

try_length_from

Tries to parse bytes starting with 'length' and returns Length .