Fedora 13 Update: john-1.7.6-1.fc13

updates at fedoraproject.org updates at fedoraproject.org
Tue May 17 01:06:03 UTC 2011

Fedora Update Notification
2010-08-24 20:37:09

Name        : john
Product     : Fedora 13
Version     : 1.7.6
Release     : 1.fc13
URL         : http://www.openwall.com/john
Summary     : John the Ripper password cracker
Description :
John the Ripper is a fast password cracker. Its primary purpose is to
detect weak Unix passwords, but a number of other hash types are
supported as well.

Update Information:

The following changes have been made between John and 1.7.6:

* Generic crypt(3) support (enabled with "--format=crypt") has been added for
auditing password hash types supported by the system but not yet supported by
John's own optimized cryptographic routines (such as "SHA-crypt" and SunMD5).
* Optional parallelization of the above has been implemented by means of OpenMP
along with glibc's crypt_r(3) or Solaris' MT-safe crypt(3C).
* Optional parallelization of John's own optimized code for the OpenBSD-style
Blowfish-based crypt(3) (bcrypt) hashes with OpenMP has been added.
* A more suitable version of 32-bit x86 assembly code for Blowfish is now
chosen on Core i7 and similar CPUs (when they happen to run a 32-bit build).
* More optimal DES S-box expressions for PowerPC with AltiVec (making use of
the conditional select operation) contributed by Dumplinger Boy (Dango-Chu)
have been integrated.
* The bitslice DES C source code has been reworked to allow for the use of
arbitrary SIMD intrinsics, which was previously only implemented for AltiVec
as a special case.
* Support for SSE2 and MMX intrinsics with bitslice DES (as an alternative to
the supplied assembly code) has been added (currently only enabled for SSE2 on
x86-64 when compiling with GCC 4.4+).
* Support for mixed-type longer virtual vectors (such as SSE2+MMX, SSE2+ALU,
AltiVec+ALU, and other combinations) with bitslice DES has been added (not
enabled by default yet, primarily intended for easy benchmarks on future CPUs,
with future compiler versions, with even more SIMD instruction sets, and with
different DES S-box expressions that might be available in the future).
* The obsolete 32-bit SPARC assembly implementation of DES has been dropped.
* The loader will now detect password hashes specified on a line on their own,
not only as part of an /etc/passwd or PWDUMP format file.
* When run in "--stdin" mode and reading candidate passwords from a terminal
(to be typed by the user), John will no longer mess with the terminal settings.
* John will now restore terminal settings not only on normal termination or
interrupt, but also when forcibly interrupted with two Ctrl-C keypresses.

The following changes have been made between John 1.7.5 and

* A new numeric variable has been added to the word mangling rules engine:
"p" for position of the character last found with the "/" or "%" commands.

The following changes have been made between John and 1.7.5:

* Support for the use of "--format" along with "--show" or "--make-charset" has
been added.
* The choice of .rec and .log filenames for custom session names has been made
more intuitive.
* Support for "\r" (character lists with repeats) and "\p0" (reference to the
immediately preceding character list/range) has been added to the word mangling
rules preprocessor.
* The undefined and undocumented behavior of some subtle word mangling rules
preprocessor constructs has been changed to arguably be more sensible.
* Some bugs were fixed, most notably JtR crashing on no password hashes loaded
(bug introduced in

The following changes have been made between John 1.7.4 and

* Major performance improvements for processing of very large password files
or sets of files, especially with salt-less or same-salt hashes, achieved
primarily through introduction of two additional hash table sizes (64K and 1M
entries), changes to the loader, and smarter processing of successful guesses
(to accommodate getting thousands of hashes successfully cracked per second).
* Many default buffer and hash table sizes have been increased and thresholds
for the use of hash tables lowered, meaning that John will now tend to use
more memory to achieve better speed (unless it is told not to with the
"--save-memory" option).
* Some previously missed common website passwords found on public lists of
"top N passwords" have been added to the bundled common passwords list.
* Some bugs introduced in 1.7.4 and affecting wordlist mode's elimination of
consecutive duplicate candidate passwords have been fixed.

The following changes have been made between John and 1.7.4:

* Support for back-references and "parallel" ranges has been added to the
word mangling rules preprocessor.
* The notion of numeric variables (to be used for character positions
and substring lengths along with numeric constants supported previously)
has been introduced into the rules engine.  Two pre-defined variables
("l" for initial or updated word's length and "m" for initial or
memorized word's last character position) and 11 user-defined variables
("a" through "k") have been added.  Additionally, there's a new numeric
constant: "z" for "infinite" position or length.
* New rule commands have been added: "A" (append, insert, or prefix with a
string), "X" (extract a substring from memory and insert), "v" (subtract
and assign to a numeric variable).
* New rule reject flags have been added: ":" (no-op, for use along with the
"parallel" ranges feature of the preprocessor) and "p" (reject unless word
pair commands are allowed, for sharing of the same ruleset between "single
crack" and wordlist modes).
* Processing of word mangling rules has been made significantly faster in
multiple ways (caching of the current length, less copying of data, code
and data placement changes for better branch prediction and L1 cache usage,
compiler-friendly use of local variables, code micro-optimizations,
removal of no-op rule commands in an initial pass).
* The default rulesets for "single crack" and wordlist modes have been
revised to make use of the new features, for speed, to produce fewer
duplicates, and to attempt additional kinds of candidate passwords (such
as for years 2010 through 2019 with "year-based" rules).
* The idle priority emulation code has been optimized for lower overhead when
there appears to be no other demand for CPU time.
* The default for the Idle setting has been changed from N to Y.


* Mon Aug 23 2010 Till Maas <opensource at till.name> - 1.7.6-1
- Update to latest release (RH #626537)
- use less regexes in %files

  [ 1 ] Bug #626537 - please update john to the latest release

This update can be installed with the "yum" update program.  Use 
su -c 'yum update john' at the command line.
For more information, refer to "Managing Software with yum",
available at http://docs.fedoraproject.org/yum/.

All packages are signed with the Fedora Project GPG key.  More details on the
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