shishi_n_fold3
Api function
Usage
#include <shishi.h>
int shishi_n_fold(Shishi * handle, const char * in, size_t inlen, char * out, size_t outlen);
Arguments
Shishi * handle
|
shishi handle as allocated by |
|---|---|
const char * in
|
input array with data to decrypt. |
size_t inlen
|
size of input array with data to decrypt ("M"). |
char * out
|
output array with decrypted data. |
size_t outlen
|
size of output array ("N"). |
Overview
Fold data into a fixed length output array, with the intent to give each input bit approximately equal weight in determining the value of each output bit.
The algorithm is from "A Better Key Schedule For DES-like Ciphers" by Uri Blumenthal and Steven M. Bellovin, http://www.research.att.com/~smb/papers/ides.pdf, although the sample vectors provided by the paper are incorrect.
Return value
Returns SHISHI_OK iff successful.
Releases
10 releases since Debian 4.0 (Etch); the text changed 5 times.