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Diffstat (limited to 'srtp/crypto/cipher/null_cipher.c')
-rw-r--r--srtp/crypto/cipher/null_cipher.c152
1 files changed, 0 insertions, 152 deletions
diff --git a/srtp/crypto/cipher/null_cipher.c b/srtp/crypto/cipher/null_cipher.c
deleted file mode 100644
index 721f50c..0000000
--- a/srtp/crypto/cipher/null_cipher.c
+++ /dev/null
@@ -1,152 +0,0 @@
-/*
- * null_cipher.c
- *
- * A null cipher implementation. This cipher leaves the plaintext
- * unchanged.
- *
- * 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 "datatypes.h"
-#include "null_cipher.h"
-#include "alloc.h"
-
-/* the null_cipher uses the cipher debug module */
-
-extern debug_module_t mod_cipher;
-
-err_status_t
-null_cipher_alloc(cipher_t **c, int key_len) {
- extern cipher_type_t null_cipher;
- uint8_t *pointer;
-
- debug_print(mod_cipher,
- "allocating cipher with key length %d", key_len);
-
- /* allocate memory a cipher of type null_cipher */
- pointer = (uint8_t*)crypto_alloc(sizeof(null_cipher_ctx_t) + sizeof(cipher_t));
- if (pointer == NULL)
- return err_status_alloc_fail;
-
- /* set pointers */
- *c = (cipher_t *)pointer;
- (*c)->type = &null_cipher;
- (*c)->state = pointer + sizeof(cipher_t);
-
- /* set key size */
- (*c)->key_len = key_len;
-
- /* increment ref_count */
- null_cipher.ref_count++;
-
- return err_status_ok;
-
-}
-
-err_status_t
-null_cipher_dealloc(cipher_t *c) {
- extern cipher_type_t null_cipher;
-
- /* zeroize entire state*/
- octet_string_set_to_zero((uint8_t *)c,
- sizeof(null_cipher_ctx_t) + sizeof(cipher_t));
-
- /* free memory of type null_cipher */
- crypto_free(c);
-
- /* decrement reference count */
- null_cipher.ref_count--;
-
- return err_status_ok;
-
-}
-
-err_status_t
-null_cipher_init(null_cipher_ctx_t *ctx, const uint8_t *key) {
-
- debug_print(mod_cipher, "initializing null cipher", NULL);
-
- return err_status_ok;
-}
-
-err_status_t
-null_cipher_set_iv(null_cipher_ctx_t *c, void *iv) {
- return err_status_ok;
-}
-
-err_status_t
-null_cipher_encrypt(null_cipher_ctx_t *c,
- unsigned char *buf, unsigned int *bytes_to_encr) {
- return err_status_ok;
-}
-
-char
-null_cipher_description[] = "null cipher";
-
-cipher_test_case_t
-null_cipher_test_0 = {
- 0, /* octets in key */
- NULL, /* key */
- 0, /* packet index */
- 0, /* octets in plaintext */
- NULL, /* plaintext */
- 0, /* octets in plaintext */
- NULL, /* ciphertext */
- NULL /* pointer to next testcase */
-};
-
-
-/*
- * note: the decrypt function is idential to the encrypt function
- */
-
-cipher_type_t null_cipher = {
- (cipher_alloc_func_t) null_cipher_alloc,
- (cipher_dealloc_func_t) null_cipher_dealloc,
- (cipher_init_func_t) null_cipher_init,
- (cipher_encrypt_func_t) null_cipher_encrypt,
- (cipher_decrypt_func_t) null_cipher_encrypt,
- (cipher_set_iv_func_t) null_cipher_set_iv,
- (char *) null_cipher_description,
- (int) 0,
- (cipher_test_case_t *) &null_cipher_test_0,
- (debug_module_t *) NULL
-};
-