#include <des_crypt.h>
int ecb_crypt(key, data, datalen, mode) char *key; char *data; unsigned datalen; unsigned mode;
int cbc_crypt(key, data, datalen, mode, ivec) char *key; char *data; unsigned datalen; unsigned mode; char *ivec;
void des_setparity(key) char *key;
Here is how to use these routines. The first parameter, key, is the 8-byte encryption key with parity. To set the key's parity, which for DES is in the low bit of each byte, use des_setparity. The second parameter, data, contains the data to be encrypted or decrypted. The third parameter, datalen, is the length in bytes of data, which must be a multiple of 8. The fourth parameter, mode, is formed by OR'ing together some things. For the encryption direction 'or' in either DES_ENCRYPT or DES_DECRYPT. For software versus hardware encryption, 'or' in either DES_HW or DES_SW. If DES_HW is specified, and there is no hardware, then the encryption is performed in software and the routine returns DESERR_NOHWDEVICE. For cbc_crypt, the parameter ivec is the 8-byte initialization vector for the chaining. It is updated to the next initialization vector upon return.
Given a result status stat, the macro DES_FAILED(stat) is false only for the first two statuses.
Created by unroff & hp-tools. © somebody (See intro for details). All Rights Reserved. Last modified 11/5/97