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libxcrypt - Extended crypt library for descrypt, md5crypt, bcrypt, and others

libxcrypt is a modern library for one-way hashing of passwords. It supports DES, MD5, SHA-2-256, SHA-2-512, and bcrypt-based password hashes, and provides the traditional Unix 'crypt' and 'crypt_r' interfaces, as well as a set of extended interfaces pioneered by Openwall Linux, 'crypt_rn', 'crypt_ra', 'crypt_gensalt',
'crypt_gensalt_rn', and 'crypt_gensalt_ra'.

libxcrypt is intended to be used by login(1), passwd(1), and other similar programs; that is, to hash a small number of passwords during an interactive authentication dialogue with a human. It is not suitable for use in bulk password-cracking applications, or in any other situation where speed is more important than careful handling of sensitive data. However, it *is* intended to be fast and lightweight enough for use in servers that must field thousands of login attempts per minute.

On Linux-based systems, by default libxcrypt will be binary backward compatible with the libcrypt.so.1 shipped as part of the GNU C Library. This means that all existing binary executables linked against glibc's libcrypt should work unmodified with this library's libcrypt.so.1. We have taken pains to provide exactly the same "symbol versions" as were used by glibc on various CPU architectures, and to account for the variety of ways in which the Openwall extensions were patched into glibc's libcrypt by some Linux distributions. (For instance, compatibility symlinks for SuSE's "libowcrypt" are provided.)
However, the converse is not true: programs linked against libxcrypt will not work with glibc's libcrypt. Also, programs that use certain legacy APIs supplied by glibc's libcrypt ('encrypt', 'encrypt_r', 'setkey', 'setkey_r', and 'fcrypt') cannot be compiled against libxcrypt.
4.4.15
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4.4.10
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4.4.6
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4.4.4
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4.2.1
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4.1.2
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4.0.0
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DistributionVersionSincePackageInstalledPackager
Fedora iconFedora 28 releases/Everything-osrpm4.0.0-5.fc282019-01-1476.8 kiB191 kiBFedora Project
Fedora iconFedora 28 releases/Server-osrpm4.0.0-5.fc282019-01-1476.8 kiB191 kiBFedora Project
Fedora iconFedora 28 releases/Workstation-osrpm4.0.0-5.fc282019-01-1476.8 kiB191 kiBFedora Project
Fedora iconFedora 29 releases/Everything-osrpm4.2.1-3.fc292019-01-1465.3 kiB183 kiBFedora Project
Fedora iconFedora 29 releases/Server-osrpm4.2.1-3.fc292019-01-1465.3 kiB183 kiBFedora Project
Fedora iconFedora 29 releases/Workstation-osrpm4.2.1-3.fc292019-01-1465.3 kiB183 kiBFedora Project
Fedora iconFedora 29 releases-test/Everything-osrpm4.1.2-1.fc292019-01-1470.8 kiB196 kiBFedora Project
Fedora iconFedora 29 releases-test/Server-osrpm4.1.2-1.fc292019-01-1470.8 kiB196 kiBFedora Project
Fedora iconFedora 29 releases-test/Workstation-osrpm4.1.2-1.fc292019-01-1470.8 kiB196 kiBFedora Project
Fedora iconFedora 30 releases/Everything-osrpm4.4.4-2.fc302019-06-17119 kiB314 kiBFedora Project
Fedora iconFedora 30 releases/Server-osrpm4.4.4-2.fc302019-06-17119 kiB314 kiBFedora Project
Fedora iconFedora 30 releases/Workstation-osrpm4.4.4-2.fc302019-06-17119 kiB314 kiBFedora Project
Fedora iconFedora 30 releases-test/Server-osrpm4.4.4-1.fc302019-06-17119 kiB314 kiBFedora Project
Fedora iconFedora 30 releases-test/Workstation-osrpm4.4.4-1.fc302019-06-17119 kiB314 kiBFedora Project
Fedora iconFedora 31 releases/Everything-osrpm4.4.10-1.fc312020-01-07126 kiB269 kiBFedora Project
Fedora iconFedora 31 releases/Server-osrpm4.4.10-1.fc312020-01-07126 kiB269 kiBFedora Project
Fedora iconFedora rawhide development/Everything-osrpm4.4.15-1.fc332020-02-27126 kiB271 kiBFedora Project
Fedora iconFedora rawhide development/Server-osrpm4.4.15-1.fc332020-02-27126 kiB271 kiBFedora Project
Fedora iconFedora rawhide development/Workstation-osrpm4.4.6-3.fc312019-08-03126 kiB268 kiBFedora Project

Manual pages

crypt_gensalt(3)

crypt_gensalt, crypt_gensalt_rn, crypt_gensalt_ra - encode settings for passphrase hashing

crypt_rn(3)

crypt, crypt_r, crypt_rn, crypt_ra - passphrase hashing

crypt(5)

crypt - storage format for hashed passphrases and available hashing methods

Latest updates

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Fedora rawhide development/Everything-os: Updated from 4.4.14-1.fc33 to 4.4.15-1.fc33

2020-02-27
  • New upstream release
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Fedora rawhide development/Server-os: Updated from 4.4.14-1.fc33 to 4.4.15-1.fc33

2020-02-27
  • New upstream release
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Fedora rawhide development/Server-os: Updated from 4.4.12-3.fc33 to 4.4.14-1.fc33

2020-02-19
  • New upstream release
Fedora icon

Fedora rawhide development/Everything-os: Updated from 4.4.12-3.fc33 to 4.4.14-1.fc33

2020-02-19
  • New upstream release
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Fedora rawhide development/Server-os: Updated from 4.4.12-2.fc32 to 4.4.12-3.fc33

2020-02-15
  • Add an upstream patch to fix a typo in the documentation
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Fedora rawhide development/Everything-os: Updated from 4.4.12-2.fc32 to 4.4.12-3.fc33

2020-02-15
  • Add an upstream patch to fix a typo in the documentation
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Fedora rawhide development/Server-os: Updated from 4.4.12-1.fc32 to 4.4.12-2.fc32

2020-02-08
  • Add two upstream patches to resolve minor bugs
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Fedora rawhide development/Everything-os: Updated from 4.4.12-1.fc32 to 4.4.12-2.fc32

2020-02-08
  • Add two upstream patches to resolve minor bugs
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Fedora rawhide development/Everything-os: Updated from 4.4.11-1.fc32 to 4.4.12-1.fc32

2020-01-31
  • New upstream release
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Fedora rawhide development/Server-os: Updated from 4.4.11-1.fc32 to 4.4.12-1.fc32

2020-01-31
  • New upstream release
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Fedora rawhide development/Everything-os: Updated from 4.4.10-2.fc32 to 4.4.11-1.fc32

2020-01-23
  • New upstream release
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Fedora rawhide development/Server-os: Updated from 4.4.10-2.fc32 to 4.4.11-1.fc32

2020-01-23
  • New upstream release
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Fedora 31 releases/Server-os: Version 4.4.10-1.fc31 introduced

2020-01-07
  • New upstream release
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Fedora 31 releases/Everything-os: Version 4.4.10-1.fc31 introduced

2020-01-07
  • New upstream release
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Fedora rawhide development/Server-os: Updated from 4.4.10-1.fc32 to 4.4.10-2.fc32

2019-12-16
  • Add two upstream patches to fix build with upcoming GCC-10
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Fedora rawhide development/Everything-os: Updated from 4.4.10-1.fc32 to 4.4.10-2.fc32

2019-12-16
  • Add two upstream patches to fix build with upcoming GCC-10
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Fedora rawhide development/Server-os: Updated from 4.4.9-1.fc32 to 4.4.10-1.fc32

2019-09-19
  • New upstream release
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Fedora rawhide development/Everything-os: Updated from 4.4.9-1.fc32 to 4.4.10-1.fc32

2019-09-19
  • New upstream release
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Fedora rawhide development/Everything-os: Updated from 4.4.8-1.fc32 to 4.4.9-1.fc32

2019-09-08
  • New upstream release (#1750010)
Fedora icon

Fedora rawhide development/Server-os: Updated from 4.4.8-1.fc32 to 4.4.9-1.fc32

2019-09-08
  • New upstream release (#1750010)

Related packages

libxcrypt-common - Common files for libxcrypt
libxcrypt-compat - Compatibility library providing legacy API functions
libxcrypt-compat-debuginfo - Debug information for package libxcrypt-compat
libxcrypt-debuginfo - Debug information for package libxcrypt
libxcrypt-debugsource - Debug sources for package libxcrypt
libxcrypt-dev - Development files for Crypt library
libxcrypt-devel - Development files for libxcrypt
libxcrypt-devel-32bit - Development files for libxcrypt
libxcrypt-devel-static - Static library for -static linking with libxcrypt
libxcrypt-source - libcrypt shared library: sources
libxcrypt-static - Static library for -static linking with libxcrypt
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