remove encauth ocb ocb3

[zpackage] / libtomcrypt / src / encauth / ocb3 / ocb3_done.c

diff --git a/libtomcrypt/src/encauth/ocb3/ocb3_done.c b/libtomcrypt/src/encauth/ocb3/ocb3_done.c
deleted file mode 100644 (file)
index b913d3a..0000000
--- a/libtomcrypt/src/encauth/ocb3/ocb3_done.c
+++ /dev/null
@@ -1,92 +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 ocb3_done.c
-   OCB implementation, INTERNAL ONLY helper, by Tom St Denis
-*/
-#include "tomcrypt.h"
-
-#ifdef LTC_OCB3_MODE
-
-/**
-   Finish OCB processing and compute the tag
-   @param ocb     The OCB state
-   @param tag     [out] The destination for the authentication tag
-   @param taglen  [in/out] The max size and resulting size of the authentication tag
-   @return CRYPT_OK if successful
-*/
-int ocb3_done(ocb3_state *ocb, unsigned char *tag, unsigned long *taglen)
-{
-   unsigned char tmp[MAXBLOCKSIZE];
-   int err, x;
-
-   LTC_ARGCHK(ocb    != NULL);
-   LTC_ARGCHK(tag    != NULL);
-   LTC_ARGCHK(taglen != NULL);
-   if ((err = cipher_is_valid(ocb->cipher)) != CRYPT_OK) {
-      goto LBL_ERR;
-   }
-
-   /* check taglen */
-   if ((int)*taglen < ocb->tag_len) {
-      *taglen = (unsigned long)ocb->tag_len;
-      return CRYPT_BUFFER_OVERFLOW;
-   }
-
-   /* finalize AAD processing */
-
-   if (ocb->adata_buffer_bytes>0) {
-     /* Offset_* = Offset_m xor L_* */
-     ocb3_int_xor_blocks(ocb->aOffset_current, ocb->aOffset_current, ocb->L_star, ocb->block_len);
-
-     /* CipherInput = (A_* || 1 || zeros(127-bitlen(A_*))) xor Offset_* */
-     ocb3_int_xor_blocks(tmp, ocb->adata_buffer, ocb->aOffset_current, ocb->adata_buffer_bytes);
-     for(x=ocb->adata_buffer_bytes; x<ocb->block_len; x++) {
-       if (x == ocb->adata_buffer_bytes) {
-         tmp[x] = 0x80 ^ ocb->aOffset_current[x];
-       }
-       else {
-         tmp[x] = 0x00 ^ ocb->aOffset_current[x];
-       }
-     }
-
-     /* Sum = Sum_m xor ENCIPHER(K, CipherInput) */
-     if ((err = cipher_descriptor[ocb->cipher].ecb_encrypt(tmp, tmp, &ocb->key)) != CRYPT_OK) {
-       goto LBL_ERR;
-     }
-     ocb3_int_xor_blocks(ocb->aSum_current, ocb->aSum_current, tmp, ocb->block_len);
-   }
-
-   /* finalize TAG computing */
-
-   /* at this point ocb->aSum_current = HASH(K, A) */
-   /* tag = tag ^ HASH(K, A) */
-   ocb3_int_xor_blocks(tmp, ocb->tag_part, ocb->aSum_current, ocb->block_len);
-
-   /* copy tag bytes */
-   for(x = 0; x < ocb->tag_len; x++) tag[x] = tmp[x];
-   *taglen = (unsigned long)ocb->tag_len;
-
-   err = CRYPT_OK;
-
-LBL_ERR:
-#ifdef LTC_CLEAN_STACK
-   zeromem(tmp, MAXBLOCKSIZE);
-   zeromem(ocb, sizeof(*ocb));
-#endif
-
-   return err;
-}
-
-#endif
-
-/* ref:         $Format:%D$ */
-/* git commit:  $Format:%H$ */
-/* commit time: $Format:%ai$ */