Asn1 Release Notes

Asn1 1.1.1

Known problems

• The syntactic construct COMPONENTS OF is not implemented.
  Own Id: OTP-2515
• ANY and ANY DEFINED BY are currently not supported.
  Own Id: OTP-2741
  Aux Id: seq 1188
• Multiple definitions of the same Type or Value is not detected by the compiler. The error occurs when the generated Erlang module is compiled.
  Own Id: OTP-3105

Asn1 1.1

Fixed errors and malfunctions

• The BER decoder failed to decode certain nested data types where IMPLICIT tags where involved. This is now corrected.
  Own Id: OTP-2719
  Aux Id: seq 1148
• The handling of types with extension marker "..." is corrected. Earlier each SEQUENCE and SET with an extension marker got an extra field named asn1_EXT in the generated record. This was a mistake and that field is now removed (conserns both BER and BER).
  Own Id: OTP-2724
  Aux Id: seq 1148, OTP-2719
• The decoder (both BER and PER) could not handle unnamed bits of a BIT STRING if the type had any named bits declared. This is now corrected and the unnamed bits are returned as {bit,Pos} where Pos is the bit position. The {bit,Pos} can be used as input to the encoder too.
  Own Id: OTP-2725
  Aux Id: seq 1148,OTP-2719,OTP-2724
• The functions asn1rt:decode and asn1ct:decode did not always return {ok,Result} or {error,Reason} as documented. This is now corrected.
  Own Id: OTP-2730
  Aux Id: seq 1158
• The compiler did not accept CHOICE types as components of a SEQUENCE or SET when the modules tag default was IMPLICIT. Example:
  C ::= CHOICE { ......} A ::= SEQUENCE { a [1] C, -- This was not accepted ..... This was an error caused by a misinterpretation of the ASN.1 standard. This is now corrected.
  Own Id: OTP-2731
  Aux Id: seq 1163
• When decoding a SEQUENCE A which contains an OPTIONAL component b which is a SEQUENCE with mandatory components, the decoder does not detect as an error that a mandatory component of b is missing. The same error could occur also in other cases with nested types and optional components of SEQUENCE or SET. This is now corrected.
  Own Id: OTP-2738
  Aux Id: seq 1183
• BER Encoding and decoding of ENUMERATED with extensionmark "..." did not work (crashed with a runtime error). This has now been corrected. If an unknown enumerated value is decoded (for an extensible enumerated type) it is returned as {asn1_enum,Value} where Value is an integer. Enumerated values in this format are also accepted by the encoder. ASN.1 modules containing ENUMERATED with extensionmark should be recompiled with the corrected version of the compiler. The BER runtime functions are also corrected.
  Own Id: OTP-2951
  Aux Id: Seq 1446 OTP-2929
• The compiler does now accept all valid value notations for the OBJECT IDENTIFIER type. The generated code for those values is also corrected.
  Own Id: OTP-3059

Improvements and new features

• The code generated for BER is significantly enhanced resulting in less code and around 300% better performance in runtime for the encoding of complex ASN.1 values. The performance of decoding is unchanged.
  Own Id: OTP-2806