NAME
pwhash
- hashes passwords from the command line or standard input
SYNOPSIS
pwhash
[-km]
[-b rounds]
[-S rounds]
[-s salt]
[-p | string]
DESCRIPTION
pwhash
prints the encrypted form of
string
to the standard output.
This is mostly useful for encrypting passwords from within scripts.
The options are as follows:
- -b rounds
-
Encrypt the string using Blowfish hashing with the specified
rounds.
- -k
-
Run in
makekey(8)
compatible mode.
A single combined key (eight chars) and salt (two chars) with no intermediate space
are read from standard input and the DES encrypted result is written to standard output without a
terminating newline.
- -m
-
Encrypt the string using MD5.
- -p
-
Prompt for a single string with echo turned off.
- -S rounds
-
Encrypt the salt with HMAC-SHA1 using the password as key and the specified
rounds
as a hint for the number of iterations.
- -s salt
-
Encrypt the string using DES, with the specified
salt.
If no
string
is specified,
pwhash
reads one string per line from standard input, encrypting each one
with the chosen algorithm from above.
In the event that no specific algorithm is given as a command line option,
the algorithm specified in the default class in
/etc/passwd.conf
will be used.
For MD5 and Blowfish a new random salt is automatically generated for each
password.
Specifying the
string
on the command line should be discouraged; using the
standard input is more secure.
FILES
/etc/passwd.conf
-
SEE ALSO
crypt(3),
passwd.conf(5)