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RedHat 9 (Linux i386) - man page for setkey (redhat section 3)

ENCRYPT(3)			    Linux Programmer's Manual			       ENCRYPT(3)

NAME
       encrypt - Encrypt 64 bits messages

SYNOPSIS
       #define _XOPEN_SOURCE

       #include <unistd.h>

       void encrypt(char block[64], int edflag);
       void setkey(const char *key);

DESCRIPTION
       These  functions  encrypt and decrypt 64 bit messages.  The setkey() function sets the key
       used by encrypt(). The key parameter used here is an array of bytes, having each byte  the
       numerical value 1 or 0. The key[n] byte, where n=8*q-1, is ignored consisting the key used
       of 56 bits.

       The setkey() function modifies the passed buffer, encoding if edflag is 0, and decoding if
       1 is being passed.

       These functions are not reentrant.

RETURN VALUE
       These functions do not return any value.

CONFORMING TO
       SVID, SUSv2

SEE ALSO
       crypt(3)

GNU					    2000-07-22				       ENCRYPT(3)


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