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ASN.1
Release Notes
Version 1.8

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- asn1 Release Notes
  - Top of chapter
  - Asn1 1.8
  - Asn1 1.7
  - Asn1 1.6.19
  - Asn1 1.6.18
  - Asn1 1.6.17
  - Asn1 1.6.16
  - Asn1 1.6.15
  - Asn1 1.6.14.1
  - Asn1 1.6.14
  - Asn1 1.6.13
  - Asn1 1.6.12
  - Asn1 1.6.11
  - Asn1 1.6.10
  - Asn1 1.6.9
  - Asn1 1.6.8.1
  - Asn1 1.6.8
  - Asn1 1.6.7
  - Asn1 1.6.6
  - Asn1 1.6.5
  - Asn1 1.6.4
  - Asn1 1.6.3
  - Asn1 1.6.2
  - Asn1 1.6.1
  - Asn1 1.6
  - Asn1 1.5.2
  - Asn1 1.5.1
  - Asn1 1.5
  - Asn1 1.4.6
  - Asn1 1.4.5

# 1 asn1 Release Notes

This document describes the changes made to the asn1 application.

### 1.1 Asn1 1.8

#### Fixed Bugs and Malfunctions

- Encoding and decoding of integer ranges can now be done with an upper bound larger than the previous limit of 16^10. The new upper bound in per encoding and decodings for constrained whole numbers is 2^2040 (close to 16^508)

  Own Id: OTP-10128

- Per encoding/decoding now works correctly for single value subtyping of an integer type where a subtype is a predefined value. Previously a predefined value could cause a non-valid range-check in the generated Erlang code for per encoding/decoding due to a bug in the constraint checking.

  Own Id: OTP-10139

- Fix typo error in selected decode function (Thanks to Artem Teslenko)

  Own Id: OTP-10152

- Better error indication when detecting unexpected tags during decoding of BER encoded data.

  Own Id: OTP-10186

- asn1rt_check: Fix transform_to_EXTERNAL1990 for binary input (Thanks to Harald Welte)

  Own Id: OTP-10233

#### Improvements and New Features

- Add support for multiple ExtensionAdditionGroups

  Own Id: OTP-10058

- Add support for extensible enumeration types in n2n generated functions.

  Own Id: OTP-10144

### 1.2 Asn1 1.7

#### Improvements and New Features

- Some ASN.1 INTEGER type and SEQUENCE constructor variants previously not handled by the ASN.1 compiler are now correctly handled

  Own Id: OTP-9688

- An INTEGER with a value constraint where unions are used e.g. X1 ::= INTEGER (1..4 | 6 | 8 | 10 | 20) is not handled correctly. For PER the value is encoded in wrong number of bits.

  Own Id: OTP-9946

### 1.3 Asn1 1.6.19

#### Improvements and New Features

- The linked-in driver used for ber decode and per encode has been replaced with nifs. To enable the usage of nifs pass the nif option to erlc or asn1rt:compile when compiling. If you previously used the linked-in driver, you have to recompile your ASN1 modules with the current version of asn1 application as the linked-in driver modules have been removed.

  *** POTENTIAL INCOMPATIBILITY ***

  Own Id: OTP-9419

- A few of the heavy calculations which are done for encoding and decoding operations when dealing with SEQUENCE OF and DEFAULT in runtime have been moved to be done in compile time instead.

  Own Id: OTP-9440

- When compiling an ASN.1 ber module with the +nif option, the module will use a new nif for ber encoding, increasing performance by about 5%.

  Own Id: OTP-9441

- Tuple funs (a two-element tuple with a module name and a function) are now officially deprecated and will be removed in R16. Use 'fun M:F/A' instead. To make you aware that your system uses tuple funs, the very first time a tuple fun is applied, a warning will be sent to the error logger.

  Own Id: OTP-9649

### 1.4 Asn1 1.6.18

#### Fixed Bugs and Malfunctions

- Implement or fix -Werror option

  If -Werror is enabled and there are warnings no output file is written. Also make sure that error/warning reporting is consistent. (Thanks to Tuncer Ayaz)

  Own Id: OTP-9536

### 1.5 Asn1 1.6.17

#### Fixed Bugs and Malfunctions

- Test cases which started failing when timer:tc was changed to not catch are corrected.

  Own Id: OTP-9286

- The bounds checking in the asn1_erl_driver when the length value of a TLV is a Long Definite Length is corrected. Thanks to Vance Shipley.

  Own Id: OTP-9303

### 1.6 Asn1 1.6.16

#### Fixed Bugs and Malfunctions

- asn1ct: Make formatting of errors and warnings consistent

  Consistently format warning and error reports. Warning and error options from erlc now also work in asnc1ct. (thanks to Tuncer Ayaz)

  Own Id: OTP-9062

- Shut off some dialyzer warnings

  Own Id: OTP-9063

#### Improvements and New Features

- Crash in asn1ct_check, componentrelation_leadingattr fixed. (Thanks to Stephane Pamelard for finding the bug)

  Own Id: OTP-9092

### 1.7 Asn1 1.6.15

#### Fixed Bugs and Malfunctions

- The encoding of ExtensionAdditionGroup (for PER and UPER) is corrected.

  Own Id: OTP-8866 Aux Id: OTP-8797, SEQ-11557

- A race condition when several processes in parallel start to do encode/decode using the driver could cause an error log regarding crashing port owner process. This race is now eliminated.

  Own Id: OTP-8948 Aux Id: seq11733

### 1.8 Asn1 1.6.14.1

#### Fixed Bugs and Malfunctions

- Extension Addition Groups are now supported by the parser and in all backends.

  Own Id: OTP-8598 Aux Id: seq-11557

- Extension Addition Groups are now supported in nested types within a SEQUENCE and CHOICE as well (missed that in previous fix)

  Own Id: OTP-8797 Aux Id: seq-11557

#### Improvements and New Features

- Bug in UNALIGNED PER regarding encoding and decoding of constrained numbers with a valuerange > 1024. (Thanks to Vincent de Phily)

  Own Id: OTP-8779

- Minor corrections in the User Guide.

  Own Id: OTP-8829

### 1.9 Asn1 1.6.14

#### Improvements and New Features

- By default, the ASN.1 compiler is now silent in the absence of warnings or errors. The new 'verbose' option or the '-v' option for erlc can be given to show extra information (for instance, about the files that are generated). (Thanks to Tuncer Ayaz.)

  Own Id: OTP-8565

### 1.10 Asn1 1.6.13

#### Fixed Bugs and Malfunctions

- Harmless buffer overflow by one byte in asn1 and ram_file_drv.

  Own Id: OTP-8451

#### Improvements and New Features

- Cross compilation improvements and other build system improvements.

  Most notable:

  - Lots of cross compilation improvements. The old cross compilation support was more or less non-existing as well as broken. Please, note that the cross compilation support should still be considered as experimental. Also note that old cross compilation configurations cannot be used without modifications. For more information on cross compiling Erlang/OTP see the $ERL_TOP/INSTALL-CROSS.md file.
  - Support for staged install using DESTDIR. The old broken INSTALL_PREFIX has also been fixed. For more information see the $ERL_TOP/INSTALL.md file.
  - Documentation of the release target of the top Makefile. For more information see the $ERL_TOP/INSTALL.md file.
  - make install now by default creates relative symbolic links instead of absolute ones. For more information see the $ERL_TOP/INSTALL.md file.
  - $ERL_TOP/configure --help=recursive now works and prints help for all applications with configure scripts.
  - Doing make install, or make release directly after make all no longer triggers miscellaneous rebuilds.
  - Existing bootstrap system is now used when doing make install, or make release without a preceding make all.
  - The crypto and ssl applications use the same runtime library path when dynamically linking against libssl.so and libcrypto.so. The runtime library search path has also been extended.
  - The configure scripts of erl_interface and odbc now search for thread libraries and thread library quirks the same way as erts do.
  - The configure script of the odbc application now also looks for odbc libraries in lib64 and lib/64 directories when building on a 64-bit system.
  - The config.h.in file in the erl_interface application is now automatically generated in instead of statically updated which reduces the risk of configure tests without any effect.

  (Thanks to Henrik Riomar for suggestions and testing)

  (Thanks to Winston Smith for the AVR32-Linux cross configuration and testing)

  *** POTENTIAL INCOMPATIBILITY ***

  Own Id: OTP-8323

- Add support for prefixing macro names generated by the compiler

  This is useful when multiple protocols that contains macros with identical names are included in a single module.

  Add the missing record_name_prefix compiler option to the documentation.

  Own Id: OTP-8453

- Cleanups suggested by tidier and modernization of types and specs.

  Own Id: OTP-8455

- Support for EXTENSIBILITY IMPLIED and SET/SEQ OF NamedType is added.

  Own Id: OTP-8463

### 1.11 Asn1 1.6.12

#### Improvements and New Features

- The documentation is now built with open source tools (xsltproc and fop) that exists on most platforms. One visible change is that the frames are removed.

  Own Id: OTP-8256

### 1.12 Asn1 1.6.11

#### Improvements and New Features

- A new option {n2n,TypeName} can be used to enable generation of conversion functions from name to number and vice versa for selected ENUMERATION types. The option can be repeated many times in order to specify several types in the same file.
  If the TypeName specified does not exists or is not an ENUMERATION type, the compilation will be terminated with an error code.
  Below follows an example on how to use the option from the command line with erlc:
  erlc -bper_bin +optimize +driver +"{n2n,'CauseMisc'}" +"{n2n,'CausePcl'}" MyModyle.asn

  Own Id: OTP-8136 Aux Id: seq11347

- Range checks added for BIT STRING with fixed SIZE constraint.

  Own Id: OTP-7972 Aux Id: seq11280

- Now support multiple-line comments in asn1-specs as specified in ASN1 X.680 (07/2002), section 11.6.4

  Own Id: OTP-8043

- Now parses and adds abstract syntax for PATTERN subtype constraint. No other action is taken on this type of constraint.

  Own Id: OTP-8046

- The ASN1 subtype constraint CONTAINING Type, CONTAINING Type ENCODED BY Value and ENCODED BY Value now is parsed. Abstract syntax is added but no further action in generated code is taken.

  Own Id: OTP-8047

### 1.13 Asn1 1.6.10

#### Fixed Bugs and Malfunctions

- A faulty receive case that catch-ed all messages in the initialization of the driver has been removed, the initialization has been restructured.

  Own Id: OTP-7954 Aux Id: seq11220

#### Improvements and New Features

- The anonymous part of the decode that splits the ASN1 TLV into Tag Value tuples has been optimized.

  Own Id: OTP-7953

### 1.14 Asn1 1.6.9

#### Fixed Bugs and Malfunctions

- Error that caused crash when drivers were loaded is now corrected. Parallel driver for asn1 now enabled.

  Own Id: OTP-7904 Aux Id: seq11220

#### Improvements and New Features

- Optimized code for ENUMERATION type in encoder/decoder.

  Own Id: OTP-7909

### 1.15 Asn1 1.6.8.1

#### Fixed Bugs and Malfunctions

- Removed parallel-driver functionality due to failure when loading the driver.

  Own Id: OTP-7900 Aux Id: seq11220

#### Improvements and New Features

- Generated code now uses guards that is not obsolete, e.g. is_integer/1 instead of integer/1.

  Own Id: OTP-7910

### 1.16 Asn1 1.6.8

#### Fixed Bugs and Malfunctions

- A BIT STRING with a size constraint that has a single value and an extension as in BIT STRING (SIZE (16,...)) was erroneous encoded/decoded. This is now corrected and follows X.691 Section 15.6.

  Own Id: OTP-7876 Aux Id: seq11220

### 1.17 Asn1 1.6.7

#### Improvements and New Features

- Now asn1 starts multiple drivers to enable simultaneous encode/decode in different processes for the asn1-backends using linked-in driver.

  Own Id: OTP-7801

### 1.18 Asn1 1.6.6

#### Fixed Bugs and Malfunctions

- Decode of an open_type when the value was empty tagged type encoded with indefinite length failed. This is now corrected.

  Own Id: OTP-7759 Aux Id: seq11166

- Encode of BIT STRING with size of exact length, on compact_bit_string format in UNALIGNED PER failed when value had the right size, i.e. no padding needed.

  Own Id: OTP-7763 Aux Id: seq11182

### 1.19 Asn1 1.6.5

#### Fixed Bugs and Malfunctions

- For a BIT STRING with SIZE constraint higher than 255 compiled with [per_bin,optimize, compact_bit_string] an improper io-list was created and sent to the c-driver for complete encoding. This error has been resolved.

  Own Id: OTP-7734 Aux Id: seq11170

### 1.20 Asn1 1.6.4

#### Fixed Bugs and Malfunctions

- A a SEQUENCE OF with a type that is a CHOICE with ellipses occurred falsely a compile error. The error causing that is now removed.

  Own Id: OTP-7708 Aux Id: seq11136

### 1.21 Asn1 1.6.3

#### Fixed Bugs and Malfunctions

- constrained number with a value-range greater than 512 now has the proper interpretation of the values that causes shift to the next number of units (bits), According to limit condition 2^m < "range" =< 2^(m + 1) then the number of bits are m + 1.

  Own Id: OTP-7681 Aux Id: seq11114

#### Improvements and New Features

- Can now handle default values of simple types that is provided on its own format, i.e. not just as asn1_DEFAULT.

  Own Id: OTP-7678 Aux Id: seq11114

### 1.22 Asn1 1.6.2

#### Fixed Bugs and Malfunctions

- comparison of two value definitions failed due to new module name field in valuedef record. It is now corrected.

  Own Id: OTP-7608

### 1.23 Asn1 1.6.1

#### Fixed Bugs and Malfunctions

- Bug regarding propagation of parameters of parameterized type fixed.

  Own Id: OTP-7174 Aux Id: seq10864

- A bug, related to instantiation of a parameterized type with a type definition in the parameter-list, has been removed. The definition of the parameter type was in another module than the instance definition causing limited module info.

  Own Id: OTP-7299 Aux Id: seq10864

- Removed hard-coded name that may cause name collision.

  Own Id: OTP-7322 Aux Id: seq10864

- Object set of a class with id with properties UNIQUE OPTIONAL and the id field is lacking in the object is for now treated as a object without a unique identifier, i.e. no table is generated for this object.

  Own Id: OTP-7332 Aux Id: seq10864

- Compiler crashed when failed to handle a OID as ValueFromObject.

  Own Id: OTP-7476 Aux Id: seq10999

- A corrupted encoding may cause a loop when a buffer of at least two bytes of zero matches tag and length of a SET component. This behavior occurred only with decoder generated with ber or ber_bin options. Now a control breaks the loop.

  Own Id: OTP-7533

- Encode of BIT STRING longer than 255 bits with a SIZE(integer()) constraint caused a crash when spec was compiled with per_bin, optimize options.

  Own Id: OTP-7602 Aux Id: seq11079

#### Improvements and New Features

- Now supports REAL type of base 2 and 10

  Own Id: OTP-7166 Aux Id: seq10864

- By the asn1 compiler option {record_name_prefix Name} a prefix is chosen to the name of the record generated in the .hrl and used in the generated .erl files.

  Own Id: OTP-7204 Aux Id: seq10853

- The TypeFromObject production now covered

  Own Id: OTP-7295 Aux Id: seq10468

- Extended support for ObjectSetFromObjects. Production occurred as a part of the RootElementSetSpec of the ObjectSetSpec. Added also support for Exclusion of Element in ObjectSetSpec.

  Own Id: OTP-7306 Aux Id: seq10864

- Now implements RELATIVE-OID

  Own Id: OTP-7334 Aux Id: seq10864

### 1.24 Asn1 1.6

#### Fixed Bugs and Malfunctions

- Now is ordering, according to the canonical order, of components in a SET added. Canonical order is described in X.691 9.2 and X.680 8.6

  Own Id: OTP-7375 Aux Id: unaligned PER

- The precedence rules for extended constraints have been misinterpreted. The rule says for instance that if there are more than one constraint on a type that have extension-mark, only the last of the extension-marks would be kept. This affects the encoding of PER and is now corrected.

  Own Id: OTP-7400 Aux Id: OTP-7335

- A constrained number with a single-value constraint that is extensible was falsely encoded/decoded in aligned/unaligned PER. This is now corrected.

  Own Id: OTP-7403

#### Improvements and New Features

- The ASN.1 compiler has got a new backend supporting PER UNALIGNED. Previously it was only support for PER ALIGNED.

  Own Id: OTP-7335

- Now the asn1-compiler handles unions and intersections of PermittedAlphabet constraints.

  Own Id: OTP-7374 Aux Id: unaligned PER

- With the undocumented option no_final_padding the whole encoded message is not padded to a border of a byte. Thus the returned encoded message is a bitstring.

  Own Id: OTP-7407

### 1.25 Asn1 1.5.2

#### Fixed Bugs and Malfunctions

- When duplicates of object fields were removed only one table access function for each unique identifier value was generated. This can occur when several object sets are merged by use of ObjectSetFromObjects.

  Own Id: OTP-7263 Aux Id: seq10864

- DER: For some complex types and components with reference to type in several steps the default value check function was not generated. This is now fixed.

  Own Id: OTP-7268 Aux Id: seq10684

- Now is the tag in a tagged type as parameter propagated to the instance.

  Own Id: OTP-7273 Aux Id: seq10864

#### Improvements and New Features

- Added type T61String that is similar to TeletexString

  Own Id: OTP-7264 Aux Id: seq10864

### 1.26 Asn1 1.5.1

#### Fixed Bugs and Malfunctions

- A bug related to renaming of types has been fixed.This occurred using the .set.asn functionality.

  Own Id: OTP-7149 Aux Id: seq10853

- syntax error in ASN1 value now correctly shown

  Own Id: OTP-7154 Aux Id: seq10864

- Now a COMPONENTS OF construct in a parameterized type is expanded correctly

  Own Id: OTP-7155 Aux Id: seq10864

- Now the asn1-compiler also handles empty SEQUENCE DEFAULT values as {}.

  Own Id: OTP-7169 Aux Id: seq10864

- Now SelectionType gets the tag of the selected type.

  Own Id: OTP-7171 Aux Id: seq10864

- Correction of generated code for decode of an open type in a SEQUECNE OF/ SET OF

  Own Id: OTP-7193 Aux Id: seq10875

#### Improvements and New Features

- Misc improvements and bug corrections regarding default values.

  Own Id: OTP-7199 Aux Id: seq10864

### 1.27 Asn1 1.5

#### Improvements and New Features

- Now generating records in .hrl file for instances of parameterized SEQUENCE or SET.

  Own Id: OTP-6835

- Optimization using bitstr in encode/decode functions. Active with [per_bin, optimize] options.

  *** POTENTIAL INCOMPATIBILITY ***

  Own Id: OTP-6882

### 1.28 Asn1 1.4.6

#### Fixed Bugs and Malfunctions

- Parsing and encoding/decoding of type constrained with SIZE with extension is now recovered.

  Own Id: OTP-6763

- inline failed because trying to use a removed module.

  Own Id: OTP-6769

- Fixed problem with a reference to a type from an object. The failure was caused bye change of type name when using inline option.

  Own Id: OTP-6770

- Handling of decode pattern for exclusive decode was false in the case when an un-decoded component had more than one following elements that should be decoded.

  Own Id: OTP-6786

#### Improvements and New Features

- Now the asn1-compiler supports two root lists in SEQUENCE and SET according to alternative three in ComponentTypeLists (X.680 07/2002 section 24.1), i.e. with an extension list between two ellipses.

  Own Id: OTP-5067 Aux Id: seq8452

### 1.29 Asn1 1.4.5

#### Fixed Bugs and Malfunctions

- Merging modules by inline earlier disabled the driver (used in modules generated with [optimized]/[optimized,driver] options). Now this is repaired.

  Own Id: OTP-6601

- Checking phase now aware of which module an INSTANCE OF is declared in.

  Own Id: OTP-6702

#### Improvements and New Features

- The compiler now handle all forms of ObjectSetSpec according to ITU-T recommendation X.681 (ISO/IEC 8824-2:2002).

  Own Id: OTP-6698

- Enhanced support of referencing object sets by ObjectSetFromObjects.

  Own Id: OTP-6707

- Support for parameterized object in an object set.

  Own Id: OTP-6717