From f0053e656a75915b64c005819af0cae440699dfb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Niels=20M=C3=B6ller?= <nisse@lysator.liu.se>
Date: Thu, 14 Feb 2002 11:47:14 +0100
Subject: [PATCH] (test_cbc_bulk): New function, testing CBC with larger
blocks.
Rev: src/nettle/testsuite/cbc-test.c:1.3
---
testsuite/cbc-test.c | 73 ++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 71 insertions(+), 2 deletions(-)
diff --git a/testsuite/cbc-test.c b/testsuite/cbc-test.c
index 4645ee83..b5ab7ad7 100644
--- a/testsuite/cbc-test.c
+++ b/testsuite/cbc-test.c
@@ -1,12 +1,79 @@
#include "testutils.h"
#include "aes.h"
#include "cbc.h"
+#include "knuth-lfib.h"
+
+/* Test with more data and inplace decryption, to check that the
+ * cbc_decrypt buffering works. */
+#define CBC_BULK_DATA 0x2710 /* 10000 */
+
+static void
+test_cbc_bulk(void)
+{
+ struct knuth_lfib_ctx random;
+
+ uint8_t clear[CBC_BULK_DATA];
+
+ uint8_t cipher[CBC_BULK_DATA + 1];
+
+ const uint8_t *key = H("966c7bf00bebe6dc 8abd37912384958a"
+ "743008105a08657d dcaad4128eee38b3");
+
+ const uint8_t *start_iv = H("11adbff119749103 207619cfa0e8d13a");
+ const uint8_t *end_iv = H("c7a42a569b421224 d0c23e52f46f97f5");
+
+ struct CBC_CTX(struct aes_ctx, AES_BLOCK_SIZE) aes;
+
+ knuth_lfib_init(&random, CBC_BULK_DATA);
+ knuth_lfib_random(&random, CBC_BULK_DATA, clear);
+
+ /* Byte that should not be overwritten */
+ cipher[CBC_BULK_DATA] = 17;
+
+ aes_set_key(&aes.ctx, 32, key);
+ CBC_SET_IV(&aes, start_iv);
+
+ CBC_ENCRYPT(&aes, aes_encrypt, CBC_BULK_DATA, cipher, clear);
+
+ if (cipher[CBC_BULK_DATA] != 17)
+ FAIL();
+
+ if (verbose)
+ {
+ printf("IV after bulk encryption: ");
+ print_hex(AES_BLOCK_SIZE, aes.iv);
+ printf("\n");
+ }
+
+ if (!MEMEQ(AES_BLOCK_SIZE, aes.iv, end_iv))
+ FAIL();
+
+ /* Decrypt, in place */
+ CBC_SET_IV(&aes, start_iv);
+ CBC_DECRYPT(&aes, aes_decrypt, CBC_BULK_DATA, cipher, cipher);
+
+ if (cipher[CBC_BULK_DATA] != 17)
+ FAIL();
+
+ if (verbose)
+ {
+ printf("IV after bulk decryption: ");
+ print_hex(AES_BLOCK_SIZE, aes.iv);
+ printf("\n");
+ }
+
+ if (!MEMEQ(AES_BLOCK_SIZE, aes.iv, end_iv))
+ FAIL();
+
+ if (!MEMEQ(CBC_BULK_DATA, clear, cipher))
+ FAIL();
+}
int
test_main(void)
{
uint8_t msg[2 * AES_BLOCK_SIZE] = "Listen, I'll say this only once!";
-
+
/* Intermediate values:
* iv XOR first message block:
* "a5 ce 55 d4 21 15 a1 c6 4a a4 0c b2 ca a6 d1 37"
@@ -36,7 +103,7 @@ test_main(void)
* F.2.1 CBC-AES128.Encrypt
*/
- /* Intermediate values, blcoks input to AES:
+ /* Intermediate values, blocks input to AES:
*
* 6bc0bce12a459991e134741a7f9e1925
* d86421fb9f1a1eda505ee1375746972c
@@ -101,6 +168,8 @@ test_main(void)
"b2eb05e2c39be9fcda6c19078c6a9d1b"),
H("000102030405060708090a0b0c0d0e0f"));
+ test_cbc_bulk();
+
SUCCESS();
}
--
GitLab