forked from cory/tildefriends
69 lines
3.3 KiB
Plaintext
69 lines
3.3 KiB
Plaintext
|
This is an implementation of a password hashing method, provided via the
|
||
|
|
crypt(3) and a reentrant interface. It is fully compatible with
|
||
|
|
OpenBSD's bcrypt.c for prefix "$2b$", originally by Niels Provos and
|
||
|
|
David Mazieres. (Please refer to the included crypt(3) man page for
|
||
|
|
information on minor compatibility issues for other bcrypt prefixes.)
|
||
|
|
|
||
|
|
I've placed this code in the public domain, with fallback to a
|
||
|
|
permissive license. Please see the comment in crypt_blowfish.c for
|
||
|
|
more information.
|
||
|
|
|
||
|
|
You can use the provided routines in your own packages, or link them
|
||
|
|
into a C library. I've provided hooks for linking into GNU libc, but
|
||
|
|
it shouldn't be too hard to get this into another C library. Note
|
||
|
|
that simply adding this code into your libc is probably not enough to
|
||
|
|
make your system use the new password hashing algorithm. Changes to
|
||
|
|
passwd(1), PAM modules, or whatever else your system uses will likely
|
||
|
|
be needed as well. These are not a part of this package, but see
|
||
|
|
LINKS for a pointer to our tcb suite.
|
||
|
|
|
||
|
|
Instructions on using the routines in one of the two common ways are
|
||
|
|
given below. It is recommended that you test the routines on your
|
||
|
|
system before you start. Type "make check" or "make check_threads"
|
||
|
|
(if you have the POSIX threads library), then "make clean".
|
||
|
|
|
||
|
|
|
||
|
|
1. Using the routines in your programs.
|
||
|
|
|
||
|
|
The available interfaces are in ow-crypt.h, and this is the file you
|
||
|
|
should include. You won't need crypt.h. When linking, add all of the
|
||
|
|
C files and x86.S (you can compile and link it even on a non-x86, it
|
||
|
|
will produce no code in this case).
|
||
|
|
|
||
|
|
|
||
|
|
2. Building the routines into GNU C library.
|
||
|
|
|
||
|
|
For versions 2.13 and 2.14 (and likely other nearby ones), extract the
|
||
|
|
library sources as usual. Apply the patch for glibc 2.14 provided in
|
||
|
|
this package. Enter crypt/ and rename crypt.h to gnu-crypt.h within
|
||
|
|
that directory. Copy the C sources, header, and assembly (x86.S) files
|
||
|
|
from this package in there as well (but be sure you don't overwrite the
|
||
|
|
Makefile). Configure, build, and install the library as usual.
|
||
|
|
|
||
|
|
For versions 2.2 to 2.3.6 (and likely also for some newer ones),
|
||
|
|
extract the library sources and maybe its optional add-ons as usual.
|
||
|
|
Apply the patch for glibc 2.3.6 provided in this package. Enter
|
||
|
|
crypt/ and rename crypt.h to gnu-crypt.h within that directory. Copy
|
||
|
|
the C sources, header, and assembly (x86.S) files from this package in
|
||
|
|
there as well (but be sure you don't overwrite the Makefile).
|
||
|
|
Configure, build, and install the library as usual.
|
||
|
|
|
||
|
|
For versions 2.1 to 2.1.3, extract the library sources and the crypt
|
||
|
|
and linuxthreads add-ons as usual. Apply the patch for glibc 2.1.3
|
||
|
|
provided in this package. Enter crypt/sysdeps/unix/, and rename
|
||
|
|
crypt.h to gnu-crypt.h within that directory. Copy C sources, header,
|
||
|
|
and assembly (x86.S) files from this package in there as well (but be
|
||
|
|
sure you don't overwrite the Makefile). Configure, build, and install
|
||
|
|
the library as usual.
|
||
|
|
|
||
|
|
Programs that want to use the provided interfaces will need to include
|
||
|
|
crypt.h (but not ow-crypt.h directly). By default, prototypes for the
|
||
|
|
new routines aren't defined (but the extra functionality of crypt(3)
|
||
|
|
is indeed available). You need to define _OW_SOURCE to obtain the new
|
||
|
|
routines as well.
|
||
|
|
|
||
|
|
--
|
||
|
|
Solar Designer <solar at openwall.com>
|
||
|
|
|
||
|
|
$Owl: Owl/packages/glibc/crypt_blowfish/README,v 1.10 2014/07/07 15:19:04 solar Exp $
|