diff options
Diffstat (limited to 'src/library/bcrypt/README')
| -rw-r--r-- | src/library/bcrypt/README | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/src/library/bcrypt/README b/src/library/bcrypt/README new file mode 100644 index 0000000..b19d90b --- /dev/null +++ b/src/library/bcrypt/README @@ -0,0 +1,68 @@ +This is an implementation of a password hashing method, provided via the +crypt(3) and a reentrant interface. It is mostly compatible with +OpenBSD's bcrypt.c (prefix "$2a$") by Niels Provos and David Mazieres. +(Please refer to the included crypt(3) man page for information on +compatibility issues.) + +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 1.9 2011/07/16 21:48:45 solar Exp $ |