Module asn1 

ASN.1/BER Encoding Library

Provides ASN.1 Basic Encoding Rules (BER) serialization and deserialization for use by LDAP, Kerberos, and other protocols that depend on ASN.1 structured data.

Features

• Tag encoding/decoding with all four tag classes
• Definite-length BER encoding (short and long forms)
• Primitive types: Boolean, Integer, BigInteger, BitString, OctetString, Null, OID, UTF8String, Enumerated
• Constructed types: Sequence, Set
• Context-specific tagged values
• Builder API for constructing ASN.1 structures fluently
• Full OID encoding/decoding with base-128 variable-length encoding

Structs

AsnBuilder

Fluent builder for constructing ASN.1 values.

AsnDecoder

Decodes BER-encoded bytes into an AsnValue tree.

AsnEncoder

Encodes an AsnValue tree into BER-encoded bytes.

Enums

AsnValue

ASN.1 value

Tag

ASN.1 tag identifiers

TagClass

ASN.1 tag class

Functions

decode_length

Decode a BER definite-length value.

decode_tag

Decode a tag from the data stream.

encode_application

Encode an application-tagged wrapper.

encode_context_specific

Encode a context-specific tagged wrapper.

encode_length

Encode a BER definite-length value.

encode_tag

Encode a tag byte (or bytes for high-tag-number form).