1 GNU Libtasn1 NEWS -*- outline -*-
3 * Noteworthy changes in release 4.14 (released 2019-07-21) [stable]
4 - New #defines for version checking: ASN1_VERSION_MAJOR, ASN1_VERSION_MINOR,
5 ASN1_VERSION_PATCH, ASN1_VERSION_NUMBER. The next release will switch
6 to semantic version semantics.
7 - Simplify ordering of SET OF elements by using qsort().
8 - Marked explicitly const uses of asn1_node with the introduction
9 of the (compatible) asn1_node_const type.
10 - Limit recursion in _asn1_expand_object_id() to detect infinite
11 recursion in incorrect .asn files (#4).
12 - asn1_array2tree(): fixed thread safety issues.
13 - Several fixes in gtk-doc generation.
16 * Noteworthy changes in release 4.13 (released 2018-01-16) [stable]
17 - On indefinite string decoding, set a maximum level of allowed recursions
18 (3) to protect the BER decoder from a stack exhaustion.
20 * Noteworthy changes in release 4.12 (released 2017-05-29) [stable]
21 - Corrected so-name version
23 * Noteworthy changes in release 4.11 (released 2017-05-27) [stable]
24 - Introduced the ASN1_TIME_ENCODING_ERROR error code to indicate
25 an invalid encoding in the DER time fields.
26 - Introduced flag ASN1_DECODE_FLAG_ALLOW_INCORRECT_TIME. This flag
27 allows decoding errors in time fields even when in strict DER mode.
28 That is introduced in order to allow toleration of invalid times in
29 X.509 certificates (which are common) even though strict DER adherence
30 is enforced in other fields.
31 - Added safety check in asn1_find_node(). That prevents a crash
32 when a very long variable name is provided by the developer.
33 Note that this to be exploited requires controlling the ASN.1
34 definitions used by the developer, i.e., the 'name' parameter of
35 asn1_write_value() or asn1_read_value(). The library is
36 not designed to protect against malicious manipulation of the
37 developer assigned variable names. Reported by Jakub Jirasek.
39 * Noteworthy changes in release 4.10 (released 2017-01-16) [stable]
41 - Removed -Werror from default compiler flags
42 - Fixed undefined behavior when negating integers in _asn1_ltostr().
43 Issue found by oss-fuzz project (via gnutls):
44 https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=388
45 - Pass the correct length to _asn1_get_indefinite_length_string in
46 asn1_get_length_ber. This addresses reading 1-byte past the end
47 of data. Issue found by oss-fuzz project (via gnutls):
48 https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=330
49 https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=331
51 * Noteworthy changes in release 4.9 (released 2016-07-25) [stable]
52 - Fixes to OID encoding of OIDs which have elements which exceed 2^32
54 * Noteworthy changes in release 4.8 (released 2016-04-11) [stable]
55 - Fixes to avoid reliance on C undefined behavior.
56 - Fixes to avoid an infinite recursion when decoding without
57 the ASN1_DECODE_FLAG_STRICT_DER flag. Reported by Pascal Cuoq.
58 - Combined all the BER octet string decoding functions to a single
59 one based on asn1_decode_simple_ber().
61 * Noteworthy changes in release 4.7 (released 2015-09-14) [stable]
62 - Fixed regression introduced in the decoding of multi-byte tags
65 * Noteworthy changes in release 4.6 (released 2015-09-05) [stable]
66 - Allow decoding OCTET STRINGs with multi-byte tags.
67 - API and ABI changes since last version:
68 asn1_get_object_id_der: New function
70 * Noteworthy changes in release 4.5 (released 2015-04-29) [stable]
71 - Corrected an invalid memory access in octet string decoding.
72 Reported by Hanno Böck.
74 * Noteworthy changes in release 4.4 (released 2015-03-29) [stable]
75 - Corrected a two-byte stack overflow in asn1_der_decoding. Reported
78 * Noteworthy changes in release 4.3 (released 2015-03-09) [stable]
79 - Added asn1_decode_simple_ber()
81 * Noteworthy changes in release 4.2 (released 2014-09-15) [stable]
82 - Added sanity checks in the decoding of time when
83 ASN1_DECODE_FLAG_STRICT_DER is used.
84 - Fixes in the decoding of OCTET STRING when close to the end
87 * Noteworthy changes in release 4.1 (released 2014-08-23) [stable]
88 - Corrected indefinite tag check in ANY constructions. That allows
89 the decoding of BER-encoded structures that contain indefinite
90 encoding within an ANY element.
91 - Added DER decoding flag ASN1_DECODE_FLAG_STRICT_DER. Over the
92 years BER functionality was added to the decoder and this flag
93 provides the way to disable it.
94 - API and ABI changes since last version:
95 ASN1_DECODE_FLAG_STRICT_DER: New definition
97 * Noteworthy changes in release 4.0 (released 2014-06-26) [stable]
98 - Optimized asn1_der_decoding_startEnd(). It no longer requires the
99 additional decoding step.
100 - asn1_read_value() understands the ?CURRENT keyword, which can be used
101 to indicate the current element of a sequence, when the provided node
102 is a sequence element.
103 - Several optimizations in DER decoding of structures with sequences
104 containing many elements.
105 - asn1_der_decoding2() is introduced and allows flags to be passed on
106 the decoding process. Currently only ASN1_DECODE_FLAG_ALLOW_PADDING is
107 defined and that allows decoding DER structures that contain arbitrary
108 data past their end. Contributed by Karel Slany.
109 - API and ABI changes since last version:
110 ASN1_DECODE_FLAG_ALLOW_PADDING: New definition
111 asn1_dup_node: New function
112 asn1_der_decoding2: New function
113 asn1_der_decoding_element: It is now an alias to asn1_der_decoding
115 * Noteworthy changes in release 3.6 (released 2014-05-25) [stable]
116 - Corrected an off-by-one error in ASN.1 DER tag decoding.
117 - Several improvements and new safety checks on DER decoding;
118 issues found using Codenomicon TLS test suite.
119 - Marked asn1_der_decoding_element() as deprecated. Use
120 asn1_der_decoding() instead.
122 * Noteworthy changes in release 3.5 (released 2014-05-01) [stable]
123 - Correctly handle decoding of recursive CHOICE options.
124 - Allow deleting elements of SET OF. Patch by Jean-Louis Thekekara.
125 - Several small bug fixes found by coverity.
126 - Code improvements contributed by Kurt Roeckx.
128 * Noteworthy changes in release 3.4 (released 2013-11-25) [stable]
129 - Added asn1_delete_structure2() which allows zeroizing the contents
130 of all values in the structure prior to deinitialization.
131 - The parser accepts negative numbers in an INTEGER range (but
132 still does no enforce them).
134 * Noteworthy changes in release 3.3 (released 2013-03-23) [stable]
135 - More precise overflow checks using gnulib's intprops module.
136 - Updates to compile in Android systems.
138 * Noteworthy changes in release 3.2 (released 2012-11-30) [stable]
139 - Corrected buffer overflow in the error reporting of the parser (reported
142 * Noteworthy changes in release 3.1 (released 2012-11-24) [stable]
143 - Completed rename of types:
144 ASN1_ARRAY_TYPE -> asn1_static_node (was asn1_static_node_t)
145 - Added new types: VisibleString, NumericString, IA5String, TeletexString,
146 PrintableString, UniversalString, BMPString, UTF8String. When re-defined
147 a warning is being print instead of failing.
148 - Parser outputs more detailed syntax error messages.
149 - Added asn1_decode_simple_der() and asn1_encode_simple_der().
150 - Added asn1_read_value_type() to return value and type.
151 - Introduced ASN1_ETYPE_UTC_TIME and ASN1_ETYPE_GENERALIZED_TIME
153 * Noteworthy changes in release 3.0 (2012-10-28) [stable]
154 - Added tool in tests/ to benchmark X.509 structure decoding.
155 - Added asn1_read_node_value() to obtain a node's value.
156 - Optimizations in internal tree allocation.
157 - Optimizations in tree search.
158 - libtasn1.h no longer exports internal structures.
159 - Types were renamed for consistency:
160 ASN1_DATA_NODE -> asn1_data_node_st
161 ASN1_ARRAY_TYPE -> asn1_static_node
162 ASN1_TYPE -> asn1_node
163 ASN1_TYPE_EMPTY -> NULL
164 static_struct_asn -> asn1_static_node_st
165 node_asn_struct -> asn1_node_st
166 node_asn -> asn1_node_st
167 (the old types are still available as definitions)
169 * Noteworthy changes in release 2.13 (2012-05-31) [stable]
170 - Updated fix for DER decoding issue to not depend on specific compilers.
171 - Updated DER decoding check to apply to short form integers as well.
173 * Noteworthy changes in release 2.12 (2012-03-19) [stable]
174 - Cleanup license headers.
175 - build: Update gnulib files.
176 - Corrected DER decoding issue (reported by Matthew Hall).
177 Added self check to detect the problem, see tests/Test_overflow.c.
178 This problem can lead to at least remotely triggered crashes, see
179 further analysis on the libtasn1 mailing list.
181 * Noteworthy changes in release 2.11 (2011-11-25) [stable]
182 - qa: Now builds without compiler warnings with Solaris CC.
183 - qa: Added clang analysis. Fixed cyclomatic complexity output.
184 - tests: Added self-test of bit string functions.
185 - build: Added windows/libtasn14win.mk rules to produce Windows binaries.
186 - build: Don't hard code path to perl in doc/gdoc.
187 - Various minor fixes.
189 * Noteworthy changes in release 2.10 (2011-10-25) [stable]
190 - lib: Small optimization, possibly working around gcc/valgrind issue.
191 - build: Update gnulib files.
192 - asn1Coding: actually implement the -c parameter.
193 - asn1Decoding: the -c parameter serves no purpose, remove it.
194 - doc: Add examples to asn1Coding and asn1Decoding description.
196 * Noteworthy changes in release 2.9 (2010-12-06) [stable]
197 - tests: Link to gnulib to avoid build error related to 'rpl_ftello' on Solaris.
198 Reported by Dagobert Michelsen.
199 - doc: Fix bug reporting address to point at help-libtasn1@gnu.org.
200 - doc: Fix Returns: documentation in Texinfo. Reported by Jeffrey Walton.
201 - build: Update gnulib files.
203 * Noteworthy changes in release 2.8 (2010-09-25) [stable]
204 - Update gnulib files.
205 - Use Libtool 2.2.10 to ease MinGW64 builds.
207 * Noteworthy changes in release 2.7 (2010-05-20) [stable]
208 - Doc: Build a PDF manual using GTK-DOC.
209 - Doc: Fix of asn1_check_version, documentation was missing from last release.
210 - Build: Avoid warnings about ignored visibility attributes on Windows.
212 * Noteworthy changes in release 2.6 (2010-04-20) [stable]
213 - Fix build failure on platforms without support for GNU LD version scripts.
214 - libtasn1: Simplified implementation of asn1_check_version.
215 - tests: Improved self-checks.
216 - Update gnulib files, fix many syntax-check nits, indent code,
217 fix license templates.
219 * Noteworthy changes in release 2.5 (2010-03-15) [stable]
220 - doc: Improve GTK-DOC comments.
221 - misc: Updated gnulib files.
223 * Noteworthy changes in release 2.4 (2010-01-18) [stable]
225 - Updated gnulib files.
226 - Clean up copyright notices.
228 * Noteworthy changes in release 2.3 (2009-07-29) [stable]
229 - Libtasn1 is now an official GNU project.
230 - Solve build problem on Tru64 related to TRUE/FALSE.
231 - More careful decoding of OIDs.
232 - Fixed warning in ASN1.y.
233 - Use "Software libraries" info dircategory.
234 - Drop GPL/LGPL copies from the manual (not needed there).
235 - New configure parameters to set packaging specific information.
236 The parameters are --with-packager, --with-packager-version, and
237 --with-packager-bug-reports. See
238 <http://article.gmane.org/gmane.comp.lib.gnulib.bugs/17791> for more
241 * Noteworthy changes in release 2.2 (2009-05-20) [stable]
242 - Change how the ASN1_API decorator is used in libtasn1.h, for GTK-DOC.
243 - Changed license of libtasn1.pc from GPLv3+ to LGPLv2.1+.
244 Reported by Jeff Cai <Jeff.Cai@Sun.COM>.
245 - Building with many warning flags now requires --enable-gcc-warnings.
246 - Some warnings fixed.
248 * Noteworthy changes in release 2.1 (2009-04-17) [stable]
249 - Fix compilation failure on platforms that can't generate empty archives,
250 e.g., Mac OS X. Reported by David Reiser <dbreiser@gmail.com>.
252 * Noteworthy changes in release 2.0 (2009-04-13) [stable]
253 - Optimized tree generation.
254 - ASN1 parser code re-generated using Bison 2.4.1.
255 - Build with more warning flags. Many compiler warnings fixed.
256 - Compiled with -fvisibility=hidden by default if supported.
257 See http://gcc.gnu.org/wiki/Visibility
258 - The libtasn1-config tool has been removed.
259 For application developers, please stop using libtasn1-config for
260 finding libtasn1, use proper autoconf checks or pkg-config instead.
261 For users that need a libtasn1 that provides a libtasn1-config
262 script (for use with older applications), use libtasn1 v1.x instead.
263 Version 1.x is still supported.
265 * Noteworthy changes in release 1.8 (2009-01-16) [stable]
266 - Fix crlf self-test under Mingw+Wine.
267 - Fix build problems on platforms that lack stdint.h.
268 Reported by Dagobert Michelsen <dam@opencsw.org> in
269 <http://thread.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/3377>.
271 * Noteworthy changes in release 1.7 (2008-11-17) [stable]
272 - Add libtasn1-config for compatibility.
273 Please stop use it as it will disappear in v2.0!
274 Use standard AC_CHECK_FUNCS autoconf tests or pkg-config instead.
275 - Read PKCS#12 blob as binary file, fixes self-tests under Mingw.
276 - Fix use of __attribute__ ((deprecated)) to work on non-GCC (#106548).
278 * Noteworthy changes in release 1.6 (2008-11-10) [stable]
279 - Fixed namespace violation for MAX_NAME_SIZE and MAX_ERROR_DESCRIPTION_SIZE.
280 The new names are ASN1_MAX_NAME_SIZE and ASN1_MAX_ERROR_DESCRIPTION_SIZE.
281 - Fixed namespace violation for libtasn1_perror and libtasn1_strerror.
282 The new names are asn1_perror and asn1_strerror.
283 - Fix namespace violation for LIBASN1_VERSION.
284 The new name is ASN1_VERSION.
285 - Decoder can now decode BER encoded octet strings.
286 - doc: Change license on the manual to GFDLv1.3+.
287 - doc: Sync gdoc script with GnuTLS, changes license on man-pages to GAP.
288 - doc: Improve gtk-doc manual.
289 - Assumes system has strdup and string.h.
290 - Remove libtasn1-config and libtasn1.m4,
291 use standard AC_CHECK_FUNCS autoconf tests or pkg-config instead.
292 - Change detection of when to use a linker version script,
293 use --enable-ld-version-script or --disable-ld-version-script to
294 override auto-detection logic.
295 - API and ABI changes since last version:
296 asn1_get_length_ber: New function.
297 ASN1_VERSION: New symbol, replaces LIBTASN1_VERSION.
298 asn1_strerror: New function, replaces libtasn1_strerror.
299 asn1_perror: New function, replaces libtasn1_perror.
300 libtasn1_strerror: Marked as deprecated.
301 libtasn1_perror: Marked as deprecated.
302 LIBTASN1_VERSION: Deprecated.
304 * Noteworthy changes in release 1.5 (2008-07-29) [stable]
305 - Update gnulib files.
306 - Fix memory leaks, from Christian Grothoff <christian@grothoff.org>.
308 * Noteworthy changes in release 1.4 (2008-04-21) [stable]
309 - Update gnulib files.
310 - Replace uses of alloca with malloc.
312 * Noteworthy changes in release 1.3 (2008-02-01) [stable]
313 - Handle 'INTEGER { ... } (a..b)' regression.
314 Revert parts of earlier fix. asn1Parser can now again parse src/pkix.asn1.
315 The ASN1.c file was generated using Bison 2.3.
316 - Move examples from src/ to new directory examples/.
317 - Duplicate copy of divergated pkix.asn removed.
318 - Merge unnecessary lib/defines.h into lib/int.h.
319 - Configure no longer tries to use gcc -pipe.
320 - Update gnulib files.
321 - Fix mem leak in self-test.
323 * Noteworthy changes in release 1.2 (2007-12-10) [stable]
324 - Update gnulib files.
326 * Noteworthy changes in release 1.1 (2007-08-31) [stable]
327 - Fix bug that made asn1_check_version believe that 1.0 is older than 0.3.10.
329 * Noteworthy changes in release 1.0 (2007-08-31) [stable]
330 - The self-tests, command line tools and build infrastructure have
331 been re-licensed from GPLv2 to GPLv3.
333 - Update gnulib files.
335 * Noteworthy changes in release 0.3.10 (2007-05-25)
336 - Update gnulib files.
338 * Noteworthy changes in release 0.3.9 (2007-03-02)
339 - In generated code, config.h is pulled in if HAVE_CONFIG_H.
340 - Development changes: changed from CVS to GIT as an experiment.
341 I push my changes to <http://repo.or.cz/w/libtasn1.git>.
342 - Autoconf 2.61 and automake 1.10 is required.
344 * Noteworthy changes in release 0.3.8 (2006-11-16)
345 - Fix reading of binary files in asn1Decoding, for Windows.
347 * Noteworthy changes in release 0.3.7 (2006-10-19)
348 - When asn1_der_coding encoded a TYPE_NULL and the output buffer is
349 NULL, it would not increment the counter properly, so the size of
350 the required buffer would be off by one. Fixed. Reported by
351 Stephen Wrobleski <steve@localtoast.org>.
352 - Fix configure to respect user-definable flags. Reported by "Diego
353 'Flameeyes' Pettenò" <flameeyes@gentoo.org>.
354 - The --help and --version outputs from the tools have been improved.
356 * Noteworthy changes in release 0.3.6 (2006-08-13)
357 - Fix man pages to use \- instead of - for negative signs (as in "-1").
358 - Add -I's when building in src/, so that unistd.h etc is found on
359 systems that doesn't have them.
360 - Valgrind isn't used for cross-compilation by default, and there is
361 also --disable-valgrind-tests to unconditionally disable it.
362 - Valgrind is invoked without parameters, put things you like into
363 ~/.valgrindrc instead.
365 * Noteworthy changes in release 0.3.5 (2006-06-27)
366 - Fix asn1_octet_der to handle writes of zero-length buffers, before
367 it did not write the ASN.1 length for a zero-length buffer. This caused
368 ASN.1 encodings to be incorrect on 64-bit platforms.
369 - Add self test that attempt to trigger the above bug.
370 - Fix test of -Wno-pointer-sign.
371 - Improve cross-compilation to MinGW by using AC_LIBTOOL_WIN32_DLL.
373 * Noteworthy changes in release 0.3.4 (2006-05-10)
374 - Really fix encodings.
375 - Add new self test, tests/Test_encoding.c.
376 - Self tests are ran under valgrind, if it is available.
377 - We test for the -Wno-pointer-sign parameter before using it.
379 * Noteworthy changes in release 0.3.3 (2006-05-07)
380 - Add some 'const' to prototypes.
381 - Remove some 'unsigned' keywords.
382 - Corrected asn1_der_coding() bug introduced when it became reentrant.
383 Now it produces correct encodings.
385 * Noteworthy changes in release 0.3.2
386 - Corrected bug in asn1_der_coding() which overwrited some
387 data in the original structure.
388 - The asn1Parser, asn1Coding and asn1Decoding programs are now installed.
390 * Noteworthy changes in release 0.3.1
391 - Support constant size bit strings, as in 'BIT STRING (SIZE(42))'.
392 Reported by Cyril Holweck <cyril.holweck@q-free.com>.
393 - Add two more APIs required by GnuTLS.
395 asn1_find_node function
398 * Noteworthy changes in release 0.3.0
399 - Export DER utility functions, mostly so that GnuTLS can avoid using
401 - The _asn1* symbols are not exported in the shared library file (when
403 - The library can now be built using Visual Studio, and the project
404 files are included in windows/.
414 * Noteworthy changes in release 0.2.18
415 - Fix out-of-bounds access in DER decoding, reported by Evgeny Legerov.
416 - Add 'const' keyword to some prototypes, thanks to Frediano ZIGLIO.
417 - Fixed typo in src/Makefile.am to make it build with objdir != srcdir,
418 thanks to Bernard Leak.
419 - Update of gnulib files.
420 - Typo fixes in comments, e.g. finish libasn1 to libtasn1 renaming,
421 use LGPL boiler plate on some files in lib/.
423 * Noteworthy changes in release 0.2.17
424 - Fixed typo to make it build.
426 * Noteworthy changes in release 0.2.16
427 - * Noteworthy changes in release script added again.
429 * Noteworthy changes in release 0.2.15
430 - Gnulib is used to implement memmove if your system does not have it.
431 - Simplified assert/error handling slightly.
433 * Noteworthy changes in release 0.2.14
435 - Pkg-config script 'libtasn1.pc' added.
436 - Postal address to FSF in license updated.
438 * Noteworthy changes in release 0.2.13
439 - * Noteworthy changes in release number in libtasn1.h updated properly.
441 * Noteworthy changes in release 0.2.12
442 - Manual converted to Texinfo format.
443 - Manual in GTK-DOC and DevHelp formats added.
444 - Man pages for all functions added.
445 - Various internal cleanups.
447 * Noteworthy changes in release 0.2.11
448 - Added the self test with "make check" target
449 - Added management of ANY type with null length
450 - Corrected some writes to invalid data.
452 * Noteworthy changes in release 0.2.10
453 - Added scripts to assist in libtasn1 version detection
454 from configure scripts.
455 - Corrected a DER decoding bug which was reported
456 by Max Vozeler <max@hinterhof.net>.
458 * Noteworthy changes in release 0.2.9
459 - Accept negative numbers as range in INTEGER declarations
461 * Noteworthy changes in release 0.2.8
462 - Add asn1_delete_element function
464 * Noteworthy changes in release 0.2.7
465 - Added versioned symbols.
467 * Noteworthy changes in release 0.2.6
468 - ASN.1 parser accepts these kinds of integer definitions:
469 "INTEGER (5 | 10)" and
471 - Comments start at "--" and finish at the "end of line" or
474 * Noteworthy changes in release 0.2.5
475 - Bug fix in ordering procedure for SET OF and SEQUENCE OF
477 - Manage structured format (BER encoding) in
478 asn1_der_decoding, asn1_decoding_element and
479 asn1_der_decoding_startEnd for OCTET STRING type.
480 - Manage SEQUENCE and SET empty structure.
481 - Manage "indefinite length method" in asn1_der_decoding,
482 asn1_decoding_element and asn1_der_decoding_startEnd
483 for the following types:
484 SEQUENCE, SEQUENCE OF, SET, and SET OF.
485 - Bug fix in asn1_read_value with NULL parameter in case
488 * Noteworthy changes in release 0.2.4
489 - Bug fix in asn1_der_coding with NULL parameter
490 - Manage DEFAULT option with OBJECT IDENTIFIER
492 * Noteworthy changes in release 0.2.3
493 - Chenge asn1_find_structure_from_oid prototype
494 - Chenge asn1_find_structure_from_oid prototype
495 - Add ASN1_MEM_ALLOC_ERROR return value
497 * Noteworthy changes in release 0.2.2
498 - Add vector length check in asn1_der_coding function
499 - Add vector length check in asn1_der_coding function
500 - Add vector length check in asn1_read_value function
501 - Add asn1_check_version function
503 * Noteworthy changes in release 0.2.1
504 - Add asn1_find_structure_from_oid function
505 - Add asn1_read_tag function
507 * Noteworthy changes in release 0.2.0
508 - Support for other platforms
509 - Change asn1_create_element function interface (dest_name not needed any more)
510 - Change OBJECT IDENTIFIER syntax: numbers must be separated by dot in
511 asn1_write_element and asn1_read_element functions (e.g. "1.2.3.4")
513 * Noteworthy changes in release 0.1.2
514 - Added GeneralString type
515 - Fixed a DER encoding bug when nested tags are used
517 * Noteworthy changes in release 0.1.1
518 - Renamed to libtasn1
519 - Functions which return a string for error description
520 now accept a NULL argument.
521 - License is now GNU Lesser GPL
523 * Noteworthy changes in release 0.1.0
526 ----------------------------------------------------------------------
527 Copyright (C) 2002-2014 Free Software Foundation, Inc.
528 Copying and distribution of this file, with or without modification,
529 are permitted in any medium without royalty provided the copyright
530 notice and this notice are preserved.