2007-01-25 06:40:21 +00:00
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mkpasswd.c documentation
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$Id: README.mkpasswd 6 2005-09-10 01:02:21Z nenolod $
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This is documentation for the updated mkpasswd.c included with a number
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of ircd, irc services, and non-IRC related programs
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2011-01-06 05:20:04 +00:00
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This version of mkpasswd can create DES, Extended DES, Blowfish, and MD5
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2007-01-25 06:40:21 +00:00
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passwords, with either randomly generated or user provided salts.
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Options:
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-m Generate an MD5 password
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-d Generate a DES password
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-b Generate a Blowfish password
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2007-01-25 06:40:21 +00:00
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-e Generate an Extended (BSDi) DES password
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-l Specify a length for a random MD5 or Blowfish salt
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-r Specify a number of rounds for a Blowfish or Extended DES password
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Blowfish: no more than 6 recommended, no less than 4 accepted
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Extended DES: default of 25
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-s Specify a salt, 2 alphanumeric characters for DES, up to 16 for MD5,
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up to 22 for Blowfish, 2 for Extended DES
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-p Specify a plaintext password to use
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-? Get brief help
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-h Get extended help
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Without the presence of any parameters, it'll behave like the old mkpasswd,
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creating a DES password with a randomly generated salt and prompting for
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the password (without echo).
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A DES salt is a pair of alphanumeric characters ('.' and '/' are permitted
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as well), such as 'a4' or 'Td'.
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An MD5 salt consists of up to 16 (though most implementations limit you to
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8) alphanumeric characters (plus '.' and '/'),
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such as 'tGd' or 'J6d4dfG'.
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2011-01-06 05:20:04 +00:00
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A Blowfish salt consists of up to 22 alphanumeric characters (plus '.' and
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'/'). Blowfish also specifies a number of rounds*, by default 4.
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Known bugs:
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The encryption algorithms supported depend on your system's crypt()
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implementation.
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The maximum length of an MD5 salt is limited to your systems crypt()
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implementation, typically 8.
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Supported Platforms (Known and tested):
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Linux glibc (DES and MD5)
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FreeBSD 3.x (DES (MD5 maybe))
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FreeBSD 4.x (DES, MD5, Blowfish, Extended DES)
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Solaris 2.5-2.6 (DES only)
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Cygwin 1.1.4 (DES only)
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Prior Cygwin with the MD5 libcrypt (MD5 only)
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OpenBSD 2.7 (don't link with -lcrypt) (DES, MD5, Blowfish)
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Mac OS-X (Darwin) (don't link with -lcrypt) (DES only)
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An MMK build script is included, as well as an MD5 crypt() implementation
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Other systems probably work, but they haven't been amply tested.
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2011-01-06 05:20:04 +00:00
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* Blowfish's rounds parameter is a logarithm, not an integer value
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