options: Complete the transition to numeric toggles (`#if') For the sake of review, this commit alters only the code; the affiliated comments within the source files also need to be updated, but doing so now would obscure the operational changes that have been made here. * All on/off options have been switched to the numeric `#if' variant; that is the only way to make this `default_options.h.in' thing work in a reasonable manner. * There is now some very minor compile-time checking of the user's choice of options. * NO_FAST_EXPTMOD doesn't seem to be used, so it has been removed. * ENABLE_USER_ALGO_LIST was supposed to be renamed DROPBEAR_USER_ALGO_LIST, and this commit completes that work. * DROPBEAR_FUZZ seems to be a relatively new, as-yet undocumented option, which was added by the following commit: commit 6e0b539e9ca0b5628c6c5a3d118ad6a2e79e8039 Author: Matt Johnston <[email protected]> Date: Tue May 23 22:29:21 2017 +0800 split out checkpubkey_line() separately It has now been added to `sysoptions.h' and defined as `0' by default. * The configuration option `DROPBEAR_PASSWORD_ENV' is no longer listed in `default_options.h.in'; it is no longer meant to be set by the user, and is instead left to be defined in `sysoptions.h' (where it was already being defined) as merely the name of the environment variable in question: DROPBEAR_PASSWORD To enable or disable use of that environment variable, the user must now toggle `DROPBEAR_USE_DROPBEAR_PASSWORD'. * The sFTP support is now toggled by setting `DROPBEAR_SFTPSERVER', and the path of the sFTP server program is set independently through the usual SFTPSERVER_PATH.

/* 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 f8_setiv.c
   F8 implementation, set IV, Tom St Denis
*/

#ifdef LTC_F8_MODE

/**
   Set an initialization vector
   @param IV   The initialization vector
   @param len  The length of the vector (in octets)
   @param f8   The F8 state
   @return CRYPT_OK if successful
*/
int f8_setiv(const unsigned char *IV, unsigned long len, symmetric_F8 *f8)
{
   int err;

   LTC_ARGCHK(IV != NULL);
   LTC_ARGCHK(f8 != NULL);

   if ((err = cipher_is_valid(f8->cipher)) != CRYPT_OK) {
       return err;
   }

   if (len != (unsigned long)f8->blocklen) {
      return CRYPT_INVALID_ARG;
   }

   /* force next block */
   f8->padlen = 0;
   return cipher_descriptor[f8->cipher].ecb_encrypt(IV, f8->IV, &f8->key);
}

#endif


/* ref:         $Format:%D$ */
/* git commit:  $Format:%H$ */
/* commit time: $Format:%ai$ */