This document describes the changes made to the asn1 application.
All incorrect (that is, all) uses of "can not" has been corrected to "cannot" in source code comments, documentation, examples, and so on.
Own Id: OTP-14282 Aux Id: PR-1891
Handle erroneous length during decode (BER only) without crashing.
Own Id: OTP-15470 Aux Id: ERIERL-278
A bug in ASN.1 BER decoding has been fixed. When decoding a recursively enclosed term the length was not propagated to that term decoding, so if the length of the enclosed term was longer than the enclosing that error was not detected.
A hard coded C stack limitation for decoding recursive ASN.1 terms has been introduced. This is currently set to 8 kWords giving a nesting depth of about 1000 levels. Deeper terms can not be decoded, which should not be much of a real world limitation.
Own Id: OTP-14440 Aux Id: ERIERL-220
Update to use the new string api instead of the old.
Own Id: OTP-15036
Handle erroneous length during decode (BER only) without crashing.
Own Id: OTP-15470 Aux Id: ERIERL-278
A bug in ASN.1 BER decoding has been fixed. When decoding a recursively enclosed term the length was not propagated to that term decoding, so if the length of the enclosed term was longer than the enclosing that error was not dectected
A hard coded C stack limitation for decoding recursive ASN.1 terms has been introduced. This is currently set to 8 kWords giving a nesting depth of about 1000 levels. Deeper terms can not be decoded, which should not be much of a real world limitation.
Own Id: OTP-14440 Aux Id: ERIERL-220
Dialyzer suppression has been added for the generated ASN.1 helper function to_bitstring/1 that previously created irrelevant warnings.
Own Id: OTP-13882 Aux Id: ERIERL-144
There was a issue with BER encoding and the
Own Id: OTP-14786 Aux Id: ERL-518
The asn1ct:test functions crashed on decoders generated
with options
Own Id: OTP-14787 Aux Id: ERL-518
Compiling an ASN.1 module using the option {n2n, EnumTypeName} when EnumTypeName contains a hypen like for example Cause-Misc caused syntax errors when compiling the generated Erlang code. This is now corrected.
Own Id: OTP-14495 Aux Id: ERL-437
Default values now work in extension for PER, so if you
give the atom
Own Id: OTP-13011 Aux Id: ERIERL-60
Fixed compilation error of generated code caused by a missing quotation of function names as part of an external call for encoding.
Own Id: OTP-14519 Aux Id: ERIERL-49
Add compile option
Own Id: OTP-14316 Aux Id: PR-1390
The
Own Id: OTP-13961
The deprecated module
*** POTENTIAL INCOMPATIBILITY ***
Own Id: OTP-14146
The new '
Own Id: OTP-14219
Compiling multiple ASN.1 modules in the same directory with parallel make (make -j) should now be safe.
Own Id: OTP-13624
Internal changes
Own Id: OTP-13551
When compiling to the PER format, the ASN.1 compiler would crash when attempting to compile an ASN.1 module with a constrained INTEGER with more than 65536 values and named values. (Thanks to Ingars for reporting this bug.)
Own Id: OTP-13257
The ASN.1 compiler will now emit Dialyzer suppressions
for improper lists. Thus, there is no longer any need to
use
Own Id: OTP-13324
Trying to encode an empty named BIT STRING in BER would
fail with a
Own Id: OTP-13149
Many bugs have been eliminated in the the ASN.1 compiler so that it can now successfully compile many more ASN.1 specifications. Error messages have also been improved.
Own Id: OTP-12395
The documentation for
Own Id: OTP-12765 Aux Id: seq12866, seq12867
The ASN.1 compiler would crash if a SEQUENCE ended
with a double set of ellipses (
Own Id: OTP-12546 Aux Id: seq12815
When decoding BER, primitives with an indefinite length will be immediately rejected. (Thanks to Simon Cornish for reporting this bug.)
Own Id: OTP-12205
BER: A bug with compliance to X.680 (200811) s31.2.7 has been fixed. Basically, when TagDefault is AUTOMATIC then tags are IMPLICIT unless EXPLICIT is given.
Own Id: OTP-12318
Usage of the
Own Id: OTP-12326
Several problems where the ASN.1 compiler would crash when attempting to compile correct specifications have been corrected.
Own Id: OTP-12125
Robustness when decoding incorrect BER messages has been improved.
Own Id: OTP-12145
The ASN.1 compiler now generates code that don't trigger Dialyzer warnings. Along the way, a few minor bugs were fixed.
Own Id: OTP-11372 Aux Id: seq12397
Subtyping an extensible ENUMERATED would cause an compilation error. (Thanks to Morten Nygaard Åsnes for reporting this bug.)
Own Id: OTP-11700
When specifying the value for an OCTET STRING in a specification, the ASN.1 standard clearly states that the value must be either a bstring or an hstring, but NOT a cstring. The ASN.1 compiler will now generate a compilation error if the value of an OCTET STRING is given as a character string.
That is, the following example is now illegal:
*** POTENTIAL INCOMPATIBILITY ***
Own Id: OTP-11727
Application upgrade (appup) files are corrected for the following applications:
A new test utility for testing appup files is added to test_server. This is now used by most applications in OTP.
(Thanks to Tobias Schlager)
Own Id: OTP-11744
By giving --enable-static-{nifs,drivers} to configure it is now possible to statically linking of nifs and drivers to the main Erlang VM binary. At the moment only the asn1 and crypto nifs of the Erlang/OTP nifs and drivers have been prepared to be statically linked. For more details see the Installation Guide in the System documentation.
Own Id: OTP-11258
Code generation for the
Own Id: OTP-11573
The OCTET STRING and BIT STRING types now have a more natural mapping to Erlang types (binary and bitstring, respectively), which is more efficient and will avoid useless conversions between lists and binaries/bitstrings.
This is an incompatible change. To revert to the old
mapping to support existing applications, use the
Impact: There is a potential for better performance, as it is now possible to avoid conversions between lists and binaries both in the generated ASN.1 encode/decode code and in the application itself.
*** POTENTIAL INCOMPATIBILITY ***
Own Id: OTP-11594
All functions in the
Own Id: OTP-11731
Generated .hrl files are now protected from being included more than once.
Own Id: OTP-11804
The default value for a
Own Id: OTP-11319
The ASN.1 application would fail to build if the
Own Id: OTP-11360
An union of integer ranges in an INTEGER constraint could sometimes be interpreted as the intersection of the range.
Own Id: OTP-11411 Aux Id: seq12443
Extensible, multiple single value constraints (such as
Own Id: OTP-11415
The ASN.1 compiler would fail to compile a constraint
with values given for for the extension part (such as
Own Id: OTP-11504
The new option '
Own Id: OTP-11314
Open types greater than 16383 bytes will now be correctly encoded and decoded.
Own Id: OTP-11262 Aux Id: seq12386, OTP-11223
For the PER and UPER formats, code generation especially for encoding has been improved.
When encoding BIT STRINGs, values longer than the maximum size for the BIT STRING type would be truncated silently - they now cause an exception.
Open types greater than 16383 bytes will now be correctly encoded and decoded.
IMPORTANT NOTE: For ASN.1 specifications that depend on each other, such as the S1AP-* specifications, it is important to recompile all specifications (compiling some with this version of the compiler and some with an older version will not work).
Own Id: OTP-11300
Fix some Makefile rules that didn't support silent rules. Thanks to Anthony Ramine.
Own Id: OTP-11111
PER/UPER: A semi-constrained INTEGER with a non-zero lower bound would be incorrectly decoded. This bug was introduced in R16.
PER/UPER: Given
PER/UPER: For a type with an extensible SIZE constraint, sizes outside of the root range were incorrectly encoded.
Given a constraint such as
PER: The encoder did not align a known multiplier string (such as IA5String) of length 16 bits (exactly) to an octet boundary.
In rare circumstances, DEFAULT values for the UPER backend could be wrongly encoded.
Own Id: OTP-11134
UPER: The compiler would crash when compiling an ENUMERATED having more than 63 extended values.
PER/UPER: A SEQUENCE with more 64 extended values could not be decoded.
Own Id: OTP-11153
When decoding a SEQUENCE defined inline inside a an extension addition group, the record named generated by the decoding code would not match the name in the generated .hrl file.
Own Id: OTP-11154 Aux Id: seq12339
Postscript files no longer needed for the generation of PDF files have been removed.
Own Id: OTP-11016
When an object set is an actual parameter, the extension marker for the object set could get lost (which would cause the decoding of unknown values to fail).
Own Id: OTP-10995 Aux Id: seq12290
The generated decoder for the 'per' and 'uper' backends did not correctly decode ENUMERATEDs with a single value.
The generated encoder for the 'per' and 'uper' backends generated an empty binary for a top-level type that did not need to be encoded (such as an ENUMERATED with a single value). The correct result should be a binary containing a 0 byte.
Own Id: OTP-10916 Aux Id: seq12270
Fixed broken table constraints within a SET OF or SEQUENCE OF for the BER backend.
Own Id: OTP-10853 Aux Id: seq12245
Encoding SEQUENCEs with multiple extension addition groups with optional values could fail (depending both on the specification and whether all values were provided).
Own Id: OTP-10664
The options for the ASN.1 compiler has been
drastically simplified. The backend is chosen by using
Another change is that generated
*** POTENTIAL INCOMPATIBILITY ***
Own Id: OTP-10410 Aux Id: kunagi-254 [165]
The ASN.1 compiler generates faster decode functions for PER and UPER. Some minor improvements have also been made for PER/UPER encoding, and to the BER backend.
Own Id: OTP-10519 Aux Id: kunagi-322 [233]
The ASN.1 compiler will now always include necessary
run-time functions in the generated Erlang modules
(except for
The '
Open types are now always returned as binaries (when there is no information allowing them to be decoded).
*** POTENTIAL INCOMPATIBILITY ***
Own Id: OTP-10588 Aux Id: kunagi-341 [252]
ASN.1 decoders generated with the options
Own Id: OTP-10805 Aux Id: seq12244
Encoding SEQUENCEs with multiple extension addition groups with optional values could fail (depending both on the specification and whether all values were provided).
Own Id: OTP-10811 Aux Id: OTP-10664
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
Add support for multiple ExtensionAdditionGroups
Own Id: OTP-10058
Add support for extensible enumeration types in n2n generated functions.
Own Id: OTP-10144
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
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 '
Own Id: OTP-9649
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
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
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
Crash in asn1ct_check, componentrelation_leadingattr fixed. (Thanks to Stephane Pamelard for finding the bug)
Own Id: OTP-9092
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
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
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
By default, the ASN.1 compiler is now silent in the
absence of warnings or errors. The new '
Own Id: OTP-8565
Harmless buffer overflow by one byte in asn1 and ram_file_drv.
Own Id: OTP-8451
Cross compilation improvements and other build system improvements.
Most notable:
(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
Own Id: OTP-8453
Cleanups suggested by tidier and modernization of types and specs.
Own Id: OTP-8455
Support for
Own Id: OTP-8463
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
A new option
If the
Below follows an example on how to use the option from the command line with
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
Own Id: OTP-8047
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
The anonymous part of the decode that splits the ASN1 TLV into Tag Value tuples has been optimized.
Own Id: OTP-7953
Error that caused crash when drivers were loaded is now corrected. Parallel driver for asn1 now enabled.
Own Id: OTP-7904 Aux Id: seq11220
Optimized code for ENUMERATION type in encoder/decoder.
Own Id: OTP-7909
Removed parallel-driver functionality due to failure when loading the driver.
Own Id: OTP-7900 Aux Id: seq11220
Generated code now uses guards that is not obsolete, e.g.
Own Id: OTP-7910
A BIT STRING with a size constraint that has a single
value and an extension as in
Own Id: OTP-7876 Aux Id: seq11220
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
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
For a BIT STRING with SIZE constraint higher than 255
compiled with
Own Id: OTP-7734 Aux Id: seq11170
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
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
Own Id: OTP-7681 Aux Id: seq11114
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
comparison of two value definitions failed due to new module name field in valuedef record. It is now corrected.
Own Id: OTP-7608
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
Own Id: OTP-7533
Encode of BIT STRING longer than 255 bits with a
Own Id: OTP-7602 Aux Id: seq11079
Now supports REAL type of base 2 and 10
Own Id: OTP-7166 Aux Id: seq10864
By the asn1 compiler option
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
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
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
Own Id: OTP-7407
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
Added type T61String that is similar to TeletexString
Own Id: OTP-7264 Aux Id: seq10864
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
Misc improvements and bug corrections regarding default values.
Own Id: OTP-7199 Aux Id: seq10864
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
*** POTENTIAL INCOMPATIBILITY ***
Own Id: OTP-6882
Parsing and encoding/decoding of type constrained with SIZE with extension is now recovered.
Own Id: OTP-6763
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
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
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
Merging modules by
Own Id: OTP-6601
Checking phase now aware of which module an INSTANCE OF is declared in.
Own Id: OTP-6702
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