xref: /freebsd/contrib/openbsm/NEWS (revision 195ebc7e9e4b129de810833791a19dfb4349d6a9)

OpenBSM Version History

OpenBSM 1.1

- Change auditon(2) parameters and data structures to be 32/64-bit architecture
  independent.  Add more information to man page about auditon(2) parameters.
- Add wrapper functions for auditon(2) to use legacy commands when the new
  commands are not supported.
- Add default for 'expire-after' in audit_control to expire trail files when
  the audit directory is more than 10 megabytes ('10M').
- Interface to convert between local and BSM fcntl(2) command values has been
  added:  au_bsm_to_fcntl_cmd(3) and au_fcntl_cmd_to_bsm(3), along with
  definitions of constants in audit_fcntl.h.
- A bug, introduced in OpenBSM 1.1 alpha 4, in which AUT_RETURN32 tokens
  generated by audit_submit(3) were improperly encoded has been fixed.
- Fix example in audit_submit(3) man page.  Also, make it clear that we want
  the audit ID as the argument.
- A new audit event class 'aa', for post-login authentication and
  authorization events, has been added.

OpenBSM 1.1 beta 1

- The filesz parameter in audit_control(5) now accepts suffixes: 'B' for
  Bytes, 'K' for Kilobytes, 'M' for Megabytes, and 'G' for Gigabytes.
  For legacy support no suffix defaults to bytes.
- Audit trail log expiration support added.  It is configured in
  audit_control(5) with the expire-after parameter.  If there is no
  expire-after parameter in audit_control(5), the default, then the audit
  trail files are not expired and removed.  See audit_control(5) for
  more information.
- Change defaults in audit_control: warn at 5% rather than 20% free for audit
  partitions, rotate automatically at 2mb, and set the default policy to
  cnt,argv rather than cnt so that execve(2) arguments are captured if
  AUE_EXECVE events are audited.  These may provide more usable defaults for
  many users.
- Use au_domain_to_bsm(3) and au_socket_type_to_bsm(3) to convert
  au_to_socket_ex(3) arguments to BSM format.
- Fix error encoding AUT_IPC_PERM tokens.

OpenBSM 1.1 alpha 5

- Stub libauditd(3) man page added.
- All BSM error number constants with BSM_ERRNO_.
- Interfaces to convert between local and BSM socket types and protocol
  families have been added: au_bsm_to_domain(3), au_bsm_to_socket_type(3),
  au_domain_to_bsm(3), and au_socket_type_to_bsm(3), along with definitions
  of constants in audit_domain.h and audit_socket_type.h.  This improves
  interoperability by converting local constant spaces, which vary by OS, to
  and from Solaris constants (where available) or OpenBSM constants for
  protocol domains not present in Solaris (a fair number).  These routines
  should be used when generating and interpreting extended socket tokens.
- Fix build warnings with full gcc warnings enabled on most supported
  platforms.
- Don't compile error strings into bsm_errno.c when building it in the kernel
  environment.
- When started by launchd, use the label com.apple.auditd rather than
  org.trustedbsd.auditd.

OpenBSM 1.1 alpha 4

- With the addition of BSM error number mapping, we also need to map the
  local error number passed to audit_submit(3) to a BSM error number, rather
  than have the caller perform that conversion.
- Reallocate user audit events to avoid collisions with Solaris; adopt a more
  formal allocation scheme, and add some events allocated in Solaris that
  will be of immediate use on other platforms.
- Add an event for Calife.
- Add au_strerror(3), which allows generating strings for BSM errors
  directly, rather than requiring applications to map to the local error
  space, which might not be able to entirely represent the BSM error number
  space.
- Major auditd rewrite for launchd(8) support.  Add libauditd library that is
  shared between launchd and auditd.
- Add AUDIT_TRIGGER_INITIALIZE trigger (sent via 'audit -i') for (re)starting
  auditing under launchd(8) on Mac OS X.
- Add 'current' symlink to active audit trail.
- Add crash recovery of previous audit trail file when detected on audit
  startup that it has not been properly terminated.
- Add the event AUE_audit_recovery to indicated when an audit trail file has
  been recovered from not being properly terminated.  This event is stored
  in the new audit trail file and includes the path of recovered audit trail
  file.
- Mac OS X and FreeBSD dependent code in auditd.c is separated into
  auditd_darwin.c and auditd_fbsd.c files.
- Add an event for the posix_spawn(2) and fsgetpath(2) Mac OS X system calls.
- For Mac OS X, we use ASL(3) instead of syslog(3) for logging.
- Add support for NOTICE level logging.

OpenBSM 1.1 alpha 3

- Add two new functions, au_bsm_to_errno() and au_errno_to_bsm(), to map
  between BSM error numbers (largely the Solaris definitions) and local
  errno(2) values for 32-bit and 64-bit return tokens.  This is required as
  operating systems don't agree on some of the values of more recent error
  numbers.
- Fix a bug how au_to_exec_args(3) and au_to_exec_env(3) calculates the total
  size for the token.  This bug resulted in "unknown" tokens being printed
  after the exec args/env tokens.
- Support for AUT_SOCKET_EX extended socket tokens, which describe a socket
  using a pair of IPv4/IPv6 and port tuples.
- OpenBSM BSM file header version bumped for 1.1 release.
- Deprecated Darwin constants, such as TRAILER_PAD_MAGIC, removed.

OpenBSM 1.1 alpha 2

- Include files in OpenBSM are now broken out into two parts: library builds
  required solely for user space, and system includes, which may also be
  required for use in the kernels of systems integrating OpenBSM.  Submitted
  by Stacey Son.
- Configure option --with-native-includes allows forcing the use of native
  include for system includes, rather than the versions bundled with OpenBSM.
  This is intended specifically for platforms that ship OpenBSM, have adapted
  versions of the system includes in a kernel source tree, and will use the
  OpenBSM build infrastructure with an unmodified OpenBSM distribution,
  allowing the customized system includes to be used with the OpenBSM build.
  Submitted by Stacey Son.
- Various strcpy()'s/strcat()'s have been changed to strlcpy()'s/strlcat()'s
  or asprintf().  Added compat/strlcpy.h for Linux.
- Remove compatibility defines for old Darwin token constant names; now only
  BSM token names are provided and used.
- Add support for extended header tokens, which contain space for information
  on the host generating the record.
- Add support for setting extended host information in the kernel, which is
  used for setting host information in extended header tokens.  The
  audit_control file now supports a "host" parameter which can be used by
  auditd to set the information; if not present, the kernel parameters won't
  be set and auditd uses unextended headers for records that it generates.

OpenBSM 1.1 alpha 1

- Add option to auditreduce(1) which allows users to invert sense of
  matching, such that BSM records that do not match, are selected.
- Fix bug in audit_write() where we commit an incomplete record in the
  event there is an error writing the subject token.  This was submitted
  by Diego Giagio.
- Build support for Mac OS X 10.5.1 submitted by Eric Hall.
- Fix a bug which resulted in host XML attributes not being printed
  while processing extended header tokens.  This patch was submitted by
  Martin Voros.
- Constification of function arguments so that const strings can be passed
  as arguments to tokens.  This patch was submitted by Xin LI.
- Modify the -m option so users can select more then one audit event.
- For Mac OS X, added Mach IPC support for audit trigger messages.
- Fixed a bug in getacna() which resulted in a locking problem on Mac OS X.
- Added LOG_PERROR flag to openlog when -d option is used with auditd.
- AUE events added for Mac OS X Leopard system calls.

OpenBSM 1.0

- Fix bug in auditreduce(1) which resulted in a memory fault/crash when
  the user specified an event name with -m.
- Remove AU_.* hard-coded audit class constants, as audit classes are now
  entirely dynamically configured using /etc/security/audit_class.

OpenBSM 1.0 alpha 15

- Fix bug when processing in_addr_ex tokens.
- Restore the behavior of printing the string/text specified while
  auditing arg32 tokens.
- Synchronized audit event list to Solaris, picking up the *at(2) system call
  definitions, now required for FreeBSD and Linux.  Added additional events
  for *at(2) system calls not present in Solaris.
- Bugs in auditreduce(1) fixed allowing partial date strings to be used in
  filtering events.

OpenBSM 1.0 alpha 14

- Fix endian issues when processing IPv6 addresses for extended subject
  and process tokens.
- gcc41 warnings clean.
- Teach audit_submit(3) about getaudit_addr(2).
- Add support for zonename tokens.

OpenBSM 1.0 alpha 13

- compat/clock_gettime.h now provides a compatibility implementation of
  clock_gettime(), which fixes building on Mac OS X.
- Countless man page improvements, markup fixes, content fixs, etc.
- XML printing support via "praudit -x".
- audit.log.5 expanded to include additional BSM token types.
- Added encoding and decoding routines for process64_ex, process32_ex,
  subject32_ex, header64, and attr64 tokens.
- Additional audit event identifiers for listen, mlockall/munlockall,
  getpath, POSIX message queues, and mandatory access control.

OpenBSM 1.0 alpha 12

- Correct bug in auditreduce which prevented the -c option from working
  correctly when the user specifies to process successful or failed events.
  The problem stemmed from not having access to the return token at the time
  the initial preselection occurred, but now a second preselection process
  occurs while processing the return token.
- getacfilesz(3) API added to read new audit_control(5) filesz setting,
  which auditd(8) now sets the kernel audit trail rotation size to.
- auditreduce(1) now uses stdin if no file names are specified on the command
  line; this was the documented behavior previously, but it was not
  implemented.  Be more specific in auditreduce(1)'s examples section about
  what might be done with the output of auditreduce.
- Add audit_warn(5) closefile event so that administrators can hook
  termination of an audit trail file.  For example, this might be used to
  compress the trail file after it is closed.
- auditreduce(1) now uses regular expressions for pathname matching. Users can
  now supply one or more (comma delimited) regular expressions for searching
  the pathnames. If one of the regular expressions is prefixed with a tilde
  (~), and a path matches, it will be excluded from the search results.

OpenBSM 1.0 alpha 11

- Reclassify certain read/write operations as having no class rather than the
  fr/fw class; our default classes audit intent (open) not operations (read,
  write).
- Introduce AUE_SYSCTL_WRITE event so that BSD/Darwin systems can audit reads
  and writes of sysctls as separate events.  Add additional kernel
  environment and jail events for FreeBSD.
- Break AUDIT_TRIGGER_OPEN_NEW into two events, AUDIT_TRIGGER_ROTATE_USER
  (issued by the user audit(8) tool) and AUDIT_TRIGGER_ROTATE_KERNEL (issued
  by the kernel audit implementation) so that they can be distinguished.
- Disable rate limiting of rotate requests; as the kernel doesn't retransmit
  a dropped request, the log file will otherwise grow indefinitely if the
  trigger is dropped.
- Improve auditd debugging output.
- Fix a number of threading related bugs in audit_control file reading
  routines.
- Add APIs au_poltostr() and au_strtopol() to convert between text
  representations of audit_control policy flags and the flags passed to
  auditon(A_SETPOLICY) and retrieved from auditon(A_GETPOLICY).
- Add API getacpol() to return the 'policy:' entry from audit_control, an
  extension to the Solaris file format to allow specification of policy
  persistent flags.
- Update audump to print the audit_control policy field.
- Update auditd to read the audit_control policy field and set the kernel
  policy to match it when configuring/reconfiguring.  Remove the -s and -h
  arguments as these policies are now set via the configuration file.  If a
  policy line is not found in the configuration file, continue with the
  current default of setting AUDIT_CNT.
- Fix bugs in the parsing of large execve(2) arguments and environmental
  variable tokens; increase maximum parsed argument and variable count.
- configure now detects strlcat(), used by policy-related functions.
- Reference token and record sample files added to test tree.

OpenBSM 1.0 alpha 10

- auditd now generates complete audit records for its events, as required for
  application-submitted audit records in the FreeBSD kernel audit
  implementation.

OpenBSM 1.0 alpha 9

- Rename many OpenBSM-specific constants and API elements containing the
  strings "BSM" and "bsm" to "AUDIT" and "audit", observing that this is true
  for almost all existing constants and APIs.
- Instead of passing a per-instance cookie directly into all audit filter
  APIs, pass in the audit filter daemon state pointer, which is then used by
  the module using an audit_filter_{get,set}cookie() API.  This will allow
  future service APIs provided by the filter daemon to maintain their own
  state -- for example, per-module preselection state.

OpenBSM 1.0 alpha 8

- Correct typo in definition of AUR_INT.
- Adopt OpenSolaris constant values for AUDIT_* configuration flags.
- Arguments to au_to_exec_args() and au_to_exec_env() no longer const.
- Add kernel versions of au_to_exec_args() and au_to_exec_env().
- Fix exec argument type that is printed for env strings from 'arg' to 'env'.
- New OpenBSM token version number assigned, constants added for other
  commonly seen version numbers.
- OpenBSM-specific events assigned numbers in the 43xxx range to avoid future
  collisions with Solaris.  Darwin events renamed to AUE_DARWIN_foo, as they
  are now deprecated numberings.
- autoconf now detects clock_gettime(), which is not available on Darwin.
- praudit output fixes relating to arg32 and arg64 tokens.
- Maximum record size updated to 64k-1 to match Solaris record size limit.
- Various style and comment cleanups in include files.

OpenBSM 1.0 alpha 7

- Adopted Solaris-compatible format for subject32_ex and subject64_ex
  tokens, which previously did not correctly implement variable length
  address storage.
- Prefer inttypes.h to stdint.h; enhance queue.h detection to test for
  TAILQ_FOREACH_SAFE(), which is present in recent BSD queue.h's, but not
  older ones.  OpenBSM now builds on some FreeBSD 4.x versions.
- New event types for extended attributes, ACLs, and scheduling.

OpenBSM 1.0 alpha 6

- Use AU_TO_WRITE and AU_NO_TO_WRITE for the 'keep' argument to au_close();
  previously we used hard-coded 0 and 1 values.
- Add man page for au_open(), au_write(), au_close(), and
  au_close_buffer().
- Support a more complete range of data types for the arbitrary data token:
  add AUR_CHAR (alias to AUR_BYTE), remove AUR_LONG, add AUR_INT32 (alias
  to AUR_INT), add AUR_INT64.
- Add au_close_token(), which allows writing a single token_t to a memory
  buffer.  Not likely to be used much by applications, but useful for
  writing test tools.
- Modify au_to_file() so that it accepts a timeval in user space, not just
  kernel -- this is not a Solaris BSM API so can be modified without
  causing compatibility issues.
- Define a new API, au_to_header32_tm(), which adds a struct timeval
  argument to the ordinary au_to_header32(), which is now implemented by
  wrapping au_to_header32_tm() and calling gettimeofday().  #ifndef KERNEL
  the APIs that invoke gettimeofday(), rather than having a variable
  definition.  Don't try to retrieve time zone information using
  gettimeofday(), as it's not needed, and introduces possible failure
  modes.
- Don't perform byte order transformations on the addr/machine fields of
  the terminal ID that appears in the process32/subject32 tokens.  These
  are assumed to be IP addresses, and as such, to be in network byte
  order.
- Universally, APIs now assume that IP addresses and ports are provided
  in network byte order.  APIs now generally provide these types in
  network byte order when decoding.
- Beginnings of an OpenBSM test framework can now be found in openbsm/test.
  This code is not built or installed by default.
- auditd now assigns more appropriate syslog levels to its debugging and
  error information.
- Support for audit filters introduced: audit filters are dynamically
  loaded shared objects that run in the context of a new daemon,
  auditfilterd.  The daemon reads from an audit pipe and feeds both BSM and
  parsed versions of records to shared objects using a module API.  This
  will provide a framework for the writing of intrusion detection services.
- New utility API, audit_submit(), added to capture common elements of audit
  record submission for many applications.

OpenBSM 1.0 alpha 5

- Update install notes to indicate /etc files are to be installed manually.
- On systems without LOG_SECURITY, use LOG_AUTH.
- Convert to autoconf/automake in order to move to a more portable (not
  BSD-specific) build infrastructure, and more easy conditional building of
  components.  Currently, the primary feature loss is that automake does
  not have native support for manual symlinks.  This will be addressed in a
  future OpenBSM release.
- Add compat/queue.h, to be used on systems dated BSD queue macro libraries
  (as found on Linux).
- Rename CHANGELOG to HISTORY, as our change log doesn't follow some of the
  existing conventions for a CHANGELOG.
- Some private data structures moved from audit.h to audit_internal.h to
  prevent inappropriate use by applications and name space pollution.
- Improved detection and use of endian macros using autoconf.
- Avoid non-portable use of struct in6_addr, which is largely opaque.
- Avoid leaking BSD kernel socket related token code to user space in
  bsm_token.c.
- Teach System V IPC calls to look for Linux naming variations for certain
  struct ipc_perm fields.
- Test for audit system calls, and if not present, don't build
  bsm_wrappers.c, bsm_notify.c, audit(8), and auditd(8), which rely on
  those system calls.
- au_close() is not implemented on systems that don't have audit system
  calls, but au_close_buffer() is.
- Work around missing BSDisms in bsm_wrapper.c.
- Fix nested includes so including libbsm.h in an application on Linux
  picks up the necessary definitions.

OpenBSM 1.0 alpha 4

- Remove "audit" user example from audit_user, as it's not present on most
  systems.
- Add cannot_audit() function non-Darwin systems that wraps auditon();
  required by OpenSSH BSM support.  Convert Darwin cannot_audit() into a
  function rather than a macro.
- Library build fixed on Darwin following include file tweaks.  The native
  Darwin sys/audit.h conflicts with bsm/audit.h due to duplicate types, so
  for now we force bsm_wrappers.c to not perform a nested include of
  sys/audit.h.

OpenBSM 1.0 alpha 3

- Man page formatting, cross reference, mlinks, and accuracy improvements.
- auditd and tools now compile and run on FreeBSD/arm.
- auditd will now fchown() the trail file to the audit review group, if
  defined at compile-time.
- Added AUE_SYSARCH for FreeBSD.
- Definition of AUE_SETFSGID fixed for Linux.

OpenBSM 1.0 alpha 2

- Man page formatting improvements.
- A number of new audit event identifiers for FreeBSD, Linux, and POSIX.1b
  events.
- Remove 'tfm' class, unused in OpenBSM.

OpenBSM 1.0 alpha 1

- Import of Darwin74 BSM drop
- Use 'syslog' for audit log warnings, rather than echoing to a file in
  audit_warn.
- Compile using BSD make infrastructure.
- Integrate bsm/ include files from Darwin74 XNU drop into OpenBSM.
- Narrow set of symbols and defines that are exposed in user space: don't
  compile in code relying on kernel-only types such as 'struct socket'.
- Add README, including basic build documentation.
- Compilation of Apple-specific notify and Machroutines now #ifdef __APPLE__.
- Staticize libbsm global variables to avoid leakage into applications.
- Add free_au_user_ent() so that au_user_ent's don't have to be leaked.
- Clean up bogus nul-termination checks in libbsm.
- Add libbsm API man pages: au_class.3 au_control.3 au_event.3
  au_free_token.3 au_io.3 au_mask.3 au_token.3 au_user.3 libbsm.3.
- Add man pages for BSM system calls: audit.2 auditctl.2 auditon.2 getaudit.2
  getauid.2 setaudit.2 setauid.2
- Modify various libbsm interfaces to more consistently return 'errno' values
  on failure.
- Break out au_close() into constituent parts, allowing records to be written
  to memory as well as files.
- Prefix various defines with 'BSM_' to reduce name space pollution.
- Added audit_internal.h, which can be used by a kernel audit implementation
  wanting to rely on libbsm components.
- Build with warnings, and eliminate warnings.
- Make libbsm endian-independent, storing and reading BSM are big endian
  (network byte order) rather than native byte order.  More consistently
  print IP addresses using the IP address print routine.  These changes
  make use of sys/endian.h from *BSD; since this isn't present on Darwin,
  add it to OpenBSM as compat/endian.h, which is used only on Darwin.
- Import of Darwin80 BSM drop, including 64-bit file IDs, better
  documentation of private APIs, and bug fixes.
- White space cleanup.
- Add audit.log.5, a first cut at a man page documenting the BSM file format.
- Teach au_read_rec() to recognize stand-alone file tokens, which are present
  at the beginning and end of Solaris audit trails.  Technically, these
  appear to violate the high level BSM spec, which suggests that all tokens
  are present in records, but need to be supported.
- Implement HEADER64, ATTR64, SUBJECT64 token types, which make it possible
  to run praudit(1) on basic Solaris BSM streams.
- Switched to Solaris spelling of token names; Darwin spellings are now
  deprecated and will be removed in a future version of OpenBSM.
- Adopt Solaris model for representing IPv4 and IPv6 addresses.
- Prefer C99 types.
- Attempt to universally adopt the BSD style(9) coding style for
  consistency.
- auditreduce(1) now has a usage message.
- Update support for auditctl(2) system call to support FreeBSD.
- Add support for /dev/audit as the trigger source on FreeBSD.
- Add additional event types for Darwin, FreeBSD, and Solaris.  Annotate
  conflicts (there are a few, unfortunately).  Correct spellings, comment,
  sort, etc.  These include {get,set}res[ug]id(), sendfile(), lchflags(),
  eaccess(), kqueue(), kevent(), poll(), lchmod().
- Relicensed under a BSD license, many thanks to Apple, Inc!
- Many bug fixes, cleanups, thread safety in the class, control, event,
  and user system audit databases.  Annotate some persisting atomicity
  bugs associated with the API and implementation.
- Add audump test tool.
- Adopt OpenSolaris BSM API memory semantics: caller allocates memory,
  or static memory is returned for non-_r() versions of API calls.
  _free() calls dropped as a result, and source code compatibility with
  OpenSolaris improved significantly.
- Annotate BSM events with origin OS and compatibility information.
- auditd(8), audit(8) added to the OpenBSM distribution.  auditd extended
  to support reloading of kernel event table.
- Allow comments in /etc/security configuration files.

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