remove encauth ocb ocb3

[zpackage] / libtomcrypt / src / encauth / ocb / ocb_init.c

diff --git a/libtomcrypt/src/encauth/ocb/ocb_init.c b/libtomcrypt/src/encauth/ocb/ocb_init.c
deleted file mode 100644 (file)
index e008a44..0000000
--- a/libtomcrypt/src/encauth/ocb/ocb_init.c
+++ /dev/null
@@ -1,139 +0,0 @@
-/* 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.
- */
-
-/**
-   @file ocb_init.c
-   OCB implementation, initialize state, by Tom St Denis
-*/
-#include "tomcrypt.h"
-
-#ifdef LTC_OCB_MODE
-
-static const struct {
-    int           len;
-    unsigned char poly_div[MAXBLOCKSIZE],
-                  poly_mul[MAXBLOCKSIZE];
-} polys[] = {
-{
-    8,
-    { 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0D },
-    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1B }
-}, {
-    16,
-    { 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x43 },
-    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x87 }
-}
-};
-
-/**
-  Initialize an OCB context.
-  @param ocb     [out] The destination of the OCB state
-  @param cipher  The index of the desired cipher
-  @param key     The secret key
-  @param keylen  The length of the secret key (octets)
-  @param nonce   The session nonce (length of the block size of the cipher)
-  @return CRYPT_OK if successful
-*/
-int ocb_init(ocb_state *ocb, int cipher,
-             const unsigned char *key, unsigned long keylen, const unsigned char *nonce)
-{
-   int poly, x, y, m, err;
-
-   LTC_ARGCHK(ocb   != NULL);
-   LTC_ARGCHK(key   != NULL);
-   LTC_ARGCHK(nonce != NULL);
-
-   /* valid cipher? */
-   if ((err = cipher_is_valid(cipher)) != CRYPT_OK) {
-      return err;
-   }
-
-   /* determine which polys to use */
-   ocb->block_len = cipher_descriptor[cipher].block_length;
-   x = (int)(sizeof(polys)/sizeof(polys[0]));
-   for (poly = 0; poly < x; poly++) {
-       if (polys[poly].len == ocb->block_len) {
-          break;
-       }
-   }
-   if (poly == x) {
-      return CRYPT_INVALID_ARG; /* block_len not found in polys */
-   }
-   if (polys[poly].len != ocb->block_len) {
-      return CRYPT_INVALID_ARG;
-   }
-
-   /* schedule the key */
-   if ((err = cipher_descriptor[cipher].setup(key, keylen, 0, &ocb->key)) != CRYPT_OK) {
-      return err;
-   }
-
-   /* find L = E[0] */
-   zeromem(ocb->L, ocb->block_len);
-   if ((err = cipher_descriptor[cipher].ecb_encrypt(ocb->L, ocb->L, &ocb->key)) != CRYPT_OK) {
-      return err;
-   }
-
-   /* find R = E[N xor L] */
-   for (x = 0; x < ocb->block_len; x++) {
-       ocb->R[x] = ocb->L[x] ^ nonce[x];
-   }
-   if ((err = cipher_descriptor[cipher].ecb_encrypt(ocb->R, ocb->R, &ocb->key)) != CRYPT_OK) {
-      return err;
-   }
-
-   /* find Ls[i] = L << i for i == 0..31 */
-   XMEMCPY(ocb->Ls[0], ocb->L, ocb->block_len);
-   for (x = 1; x < 32; x++) {
-       m = ocb->Ls[x-1][0] >> 7;
-       for (y = 0; y < ocb->block_len-1; y++) {
-           ocb->Ls[x][y] = ((ocb->Ls[x-1][y] << 1) | (ocb->Ls[x-1][y+1] >> 7)) & 255;
-       }
-       ocb->Ls[x][ocb->block_len-1] = (ocb->Ls[x-1][ocb->block_len-1] << 1) & 255;
-
-       if (m == 1) {
-          for (y = 0; y < ocb->block_len; y++) {
-              ocb->Ls[x][y] ^= polys[poly].poly_mul[y];
-          }
-       }
-   }
-
-   /* find Lr = L / x */
-   m = ocb->L[ocb->block_len-1] & 1;
-
-   /* shift right */
-   for (x = ocb->block_len - 1; x > 0; x--) {
-      ocb->Lr[x] = ((ocb->L[x] >> 1) | (ocb->L[x-1] << 7)) & 255;
-   }
-   ocb->Lr[0] = ocb->L[0] >> 1;
-
-   if (m == 1) {
-      for (x = 0; x < ocb->block_len; x++) {
-         ocb->Lr[x] ^= polys[poly].poly_div[x];
-      }
-   }
-
-   /* set Li, checksum */
-   zeromem(ocb->Li,       ocb->block_len);
-   zeromem(ocb->checksum, ocb->block_len);
-
-   /* set other params */
-   ocb->block_index = 1;
-   ocb->cipher      = cipher;
-
-   return CRYPT_OK;
-}
-
-#endif
-
-/* ref:         $Format:%D$ */
-/* git commit:  $Format:%H$ */
-/* commit time: $Format:%ai$ */