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<p>This document describes the changes made to the asn1 application.</p>
+<section><title>Asn1 2.0</title>
+
+ <section><title>Fixed Bugs and Malfunctions</title>
+ <list>
+ <item>
+ <p>
+ Encoding SEQUENCEs with multiple extension addition
+ groups with optional values could fail (depending both on
+ the specification and whether all values were provided).</p>
+ <p>
+ Own Id: OTP-10664</p>
+ </item>
+ </list>
+ </section>
+
+
+ <section><title>Improvements and New Features</title>
+ <list>
+ <item>
+ <p>The options for the ASN.1 compiler has been
+ drastically simplified. The backend is chosen by using
+ <c>ber</c>, <c>per</c>, or <c>uper</c>. The options
+ <c>optimize</c>, <c>nif</c>, and <c>driver</c> are no
+ longer needed. The old options will still work, but will
+ issue a warning.</p>
+ <p>Another change is that generated <c>encode/2</c>
+ function will always return a binary (some backends used
+ to return an iolist).</p>
+ <p>
+ *** POTENTIAL INCOMPATIBILITY ***</p>
+ <p>
+ Own Id: OTP-10410 Aux Id: kunagi-254 [165] </p>
+ </item>
+ <item>
+ <p>
+ 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.</p>
+ <p>
+ Own Id: OTP-10519 Aux Id: kunagi-322 [233] </p>
+ </item>
+ <item>
+ <p>The ASN.1 compiler will now always include necessary
+ run-time functions in the generated Erlang modules
+ (except for <c>asn1rt_nif</c> which is still neeeded). If
+ the option '<c>inline</c>' is used the ASN.1 compiler
+ will generate a warning. But if
+ '<c>{inline,OutputFile}</c>' is use, the ASN.1 compiler
+ will refuse to compile the file. (Use a <c>.set.asn</c>
+ file if you need to remove the output file.)</p>
+ <p>The '<c>BIT STRING</c>' type will now be decoded as
+ Erlang bitstrings by default. Use the new
+ <c>legacy_bit_string</c> option to encode as lists of
+ ones and zeroes. (The <c>compact_bit_string</c> option
+ still works as before.)</p>
+ <p>Open types are now always returned as binaries (when
+ there is no information allowing them to be decoded).</p>
+ <p>
+ *** POTENTIAL INCOMPATIBILITY ***</p>
+ <p>
+ Own Id: OTP-10588 Aux Id: kunagi-341 [252] </p>
+ </item>
+ </list>
+ </section>
+
+</section>
+
+<section><title>Asn1 1.8.1</title>
+
+ <section><title>Fixed Bugs and Malfunctions</title>
+ <list>
+ <item>
+ <p>
+ ASN.1 decoders generated with the options <c>-bber_bin
+ +optimize +nif</c> would decode open types with a size
+ larger than 511 incorrectly. That bug could cause
+ decoding by <c>public_key</c> to fail. The bug was in the
+ NIF library <c>asn1_erl_nif.so</c>; therefore there is no
+ need re-compile ASN.1 specifications that had the
+ problem.</p>
+ <p>
+ Own Id: OTP-10805 Aux Id: seq12244 </p>
+ </item>
+ <item>
+ <p>
+ Encoding SEQUENCEs with multiple extension addition
+ groups with optional values could fail (depending both on
+ the specification and whether all values were provided).</p>
+ <p>
+ Own Id: OTP-10811 Aux Id: OTP-10664 </p>
+ </item>
+ </list>
+ </section>
+
+</section>
+
<section><title>Asn1 1.8</title>
<section><title>Fixed Bugs and Malfunctions</title>