+++ /dev/null
-/* LibTomCrypt, modular cryptographic library -- Tom St Denis
- *
- * LibTomCrypt is a library that provides various cryptographic
- * algorithms in a highly modular and flexible manner.
- *
- * The library is free for all purposes without any express
- * guarantee it works.
- */
-#include "tomcrypt.h"
-
-/**
- @file f9_done.c
- f9 Support, terminate the state
-*/
-
-#ifdef LTC_F9_MODE
-
-/** Terminate the f9-MAC state
- @param f9 f9 state to terminate
- @param out [out] Destination for the MAC tag
- @param outlen [in/out] Destination size and final tag size
- Return CRYPT_OK on success
-*/
-int f9_done(f9_state *f9, unsigned char *out, unsigned long *outlen)
-{
- int err, x;
- LTC_ARGCHK(f9 != NULL);
- LTC_ARGCHK(out != NULL);
-
- /* check structure */
- if ((err = cipher_is_valid(f9->cipher)) != CRYPT_OK) {
- return err;
- }
-
- if ((f9->blocksize > cipher_descriptor[f9->cipher].block_length) || (f9->blocksize < 0) ||
- (f9->buflen > f9->blocksize) || (f9->buflen < 0)) {
- return CRYPT_INVALID_ARG;
- }
-
- if (f9->buflen != 0) {
- /* encrypt */
- cipher_descriptor[f9->cipher].ecb_encrypt(f9->IV, f9->IV, &f9->key);
- f9->buflen = 0;
- for (x = 0; x < f9->blocksize; x++) {
- f9->ACC[x] ^= f9->IV[x];
- }
- }
-
- /* schedule modified key */
- if ((err = cipher_descriptor[f9->cipher].setup(f9->akey, f9->keylen, 0, &f9->key)) != CRYPT_OK) {
- return err;
- }
-
- /* encrypt the ACC */
- cipher_descriptor[f9->cipher].ecb_encrypt(f9->ACC, f9->ACC, &f9->key);
- cipher_descriptor[f9->cipher].done(&f9->key);
-
- /* extract tag */
- for (x = 0; x < f9->blocksize && (unsigned long)x < *outlen; x++) {
- out[x] = f9->ACC[x];
- }
- *outlen = x;
-
-#ifdef LTC_CLEAN_STACK
- zeromem(f9, sizeof(*f9));
-#endif
- return CRYPT_OK;
-}
-
-#endif
-
-/* ref: $Format:%D$ */
-/* git commit: $Format:%H$ */
-/* commit time: $Format:%ai$ */
-