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-rw-r--r--srtp/crypto/replay/rdb.c137
1 files changed, 0 insertions, 137 deletions
diff --git a/srtp/crypto/replay/rdb.c b/srtp/crypto/replay/rdb.c
deleted file mode 100644
index 9f2ea87..0000000
--- a/srtp/crypto/replay/rdb.c
+++ /dev/null
@@ -1,137 +0,0 @@
-/*
- * rdb.c
- *
- * Implements a replay database for packet security
- *
- * David A. McGrew
- * Cisco Systems, Inc.
- */
-
-/*
- *
- * Copyright (c) 2001-2006, Cisco Systems, Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials provided
- * with the distribution.
- *
- * Neither the name of the Cisco Systems, Inc. nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-
-#include "rdb.h"
-
-
-/*
- * this implementation of a replay database works as follows:
- *
- * window_start is the index of the first packet in the window
- * bitmask a bit-buffer, containing the most recently entered
- * index as the leftmost bit
- *
- */
-
-/* rdb_init initalizes rdb */
-
-err_status_t
-rdb_init(rdb_t *rdb) {
- v128_set_to_zero(&rdb->bitmask);
- rdb->window_start = 0;
- return err_status_ok;
-}
-
-/*
- * rdb_check checks to see if index appears in rdb
- */
-
-err_status_t
-rdb_check(const rdb_t *rdb, uint32_t index) {
-
- /* if the index appears after (or at very end of) the window, its good */
- if (index >= rdb->window_start + rdb_bits_in_bitmask)
- return err_status_ok;
-
- /* if the index appears before the window, its bad */
- if (index < rdb->window_start)
- return err_status_replay_old;
-
- /* otherwise, the index appears within the window, so check the bitmask */
- if (v128_get_bit(&rdb->bitmask, (index - rdb->window_start)) == 1)
- return err_status_replay_fail;
-
- /* otherwise, the index is okay */
- return err_status_ok;
-}
-
-/*
- * rdb_add_index adds index to rdb_t (and does *not* check if
- * index appears in db)
- *
- * this function should be called only after rdb_check has
- * indicated that the index does not appear in the rdb, e.g., a mutex
- * should protect the rdb between these calls
- */
-
-err_status_t
-rdb_add_index(rdb_t *rdb, uint32_t index) {
- int delta;
-
- /* here we *assume* that index > rdb->window_start */
-
- delta = (index - rdb->window_start);
- if (delta < rdb_bits_in_bitmask) {
-
- /* if the index is within the window, set the appropriate bit */
- v128_set_bit(&rdb->bitmask, delta);
-
- } else {
-
- delta -= rdb_bits_in_bitmask - 1;
-
- /* shift the window forward by delta bits*/
- v128_left_shift(&rdb->bitmask, delta);
- v128_set_bit(&rdb->bitmask, rdb_bits_in_bitmask-delta);
- rdb->window_start += delta;
-
- }
-
- return err_status_ok;
-}
-
-err_status_t
-rdb_increment(rdb_t *rdb) {
-
- if (rdb->window_start++ > 0x7fffffff)
- return err_status_key_expired;
- return err_status_ok;
-}
-
-uint32_t
-rdb_get_value(const rdb_t *rdb) {
- return rdb->window_start;
-}