HP 3000 Manuals HP 3000 Manuals
crypt
Provides one-way encryption of passwords.
Syntax
char *crypt (char *key, char *salt);
Parameters
key A pointer to a character string to be encrypted.
salt A pointer to a character string used as the initial value
in the hashing algorithm.
Return Values
x A pointer to a character string containing the encrypted
password.
Description
The crypt function is the password encryption function based on the NBS
Data Encryption Standard (DES). It is a one-way algorithm that produces a
scrambled character string based upon the input string. It includes
variations from the DES intended to frustrate the use of hardware
implementations of the DES for key search.
The key parameter is your typed password. The salt parameter is a
two-character string chosen from the set [a-zA-Z0-9./]; this string is
used to set the hashing algorithm in one of 4096 different ways, after
which key is used to encrypt repeatedly a constant string. The returned
value points to the encrypted password; the first two characters of the
password is the salt itself.
The return value points to static data that are overwritten by each call.
See Also
setkey(), encrypt()