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Modern password hashing for your software and your servers
Home Page: http://www.openwall.com/crypt/
This project forked from besser82/crypt_blowfish
Modern password hashing for your software and your servers
Home Page: http://www.openwall.com/crypt/
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. 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 and header 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, and header 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 and header 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 $
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