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[Qemu-devel] [PATCH v2 8/8] crypto: add testing for unaligned buffers wi
From: |
Daniel P . Berrangé |
Subject: |
[Qemu-devel] [PATCH v2 8/8] crypto: add testing for unaligned buffers with XTS cipher mode |
Date: |
Tue, 16 Oct 2018 11:09:18 +0100 |
Validate that the XTS cipher mode will correctly operate with plain
text, cipher text and IV buffers that are not 64-bit aligned.
Signed-off-by: Daniel P. Berrangé <address@hidden>
---
tests/test-crypto-xts.c | 86 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 86 insertions(+)
diff --git a/tests/test-crypto-xts.c b/tests/test-crypto-xts.c
index 81606d90ad..6fb61cf635 100644
--- a/tests/test-crypto-xts.c
+++ b/tests/test-crypto-xts.c
@@ -416,6 +416,88 @@ static void test_xts_split(const void *opaque)
}
+static void test_xts_unaligned(const void *opaque)
+{
+#define BAD_ALIGN 3
+ const QCryptoXTSTestData *data = opaque;
+ uint8_t in[512 + BAD_ALIGN], out[512 + BAD_ALIGN];
+ uint8_t Torg[16], T[16 + BAD_ALIGN];
+ uint64_t seq;
+ struct TestAES aesdata;
+ struct TestAES aestweak;
+
+ AES_set_encrypt_key(data->key1, data->keylen / 2 * 8, &aesdata.enc);
+ AES_set_decrypt_key(data->key1, data->keylen / 2 * 8, &aesdata.dec);
+ AES_set_encrypt_key(data->key2, data->keylen / 2 * 8, &aestweak.enc);
+ AES_set_decrypt_key(data->key2, data->keylen / 2 * 8, &aestweak.dec);
+
+ seq = data->seqnum;
+ STORE64L(seq, Torg);
+ memset(Torg + 8, 0, 8);
+
+ /* IV not aligned */
+ memcpy(T + BAD_ALIGN, Torg, 16);
+ memcpy(in, data->PTX, data->PTLEN);
+ xts_encrypt(&aesdata, &aestweak,
+ test_xts_aes_encrypt,
+ test_xts_aes_decrypt,
+ T + BAD_ALIGN, data->PTLEN, out, in);
+
+ g_assert(memcmp(out, data->CTX, data->PTLEN) == 0);
+
+ /* plain text not aligned */
+ memcpy(T, Torg, 16);
+ memcpy(in + BAD_ALIGN, data->PTX, data->PTLEN);
+ xts_encrypt(&aesdata, &aestweak,
+ test_xts_aes_encrypt,
+ test_xts_aes_decrypt,
+ T, data->PTLEN, out, in + BAD_ALIGN);
+
+ g_assert(memcmp(out, data->CTX, data->PTLEN) == 0);
+
+ /* cipher text not aligned */
+ memcpy(T, Torg, 16);
+ memcpy(in, data->PTX, data->PTLEN);
+ xts_encrypt(&aesdata, &aestweak,
+ test_xts_aes_encrypt,
+ test_xts_aes_decrypt,
+ T, data->PTLEN, out + BAD_ALIGN, in);
+
+ g_assert(memcmp(out + BAD_ALIGN, data->CTX, data->PTLEN) == 0);
+
+
+ /* IV not aligned */
+ memcpy(T + BAD_ALIGN, Torg, 16);
+ memcpy(in, data->CTX, data->PTLEN);
+ xts_decrypt(&aesdata, &aestweak,
+ test_xts_aes_encrypt,
+ test_xts_aes_decrypt,
+ T + BAD_ALIGN, data->PTLEN, out, in);
+
+ g_assert(memcmp(out, data->PTX, data->PTLEN) == 0);
+
+ /* cipher text not aligned */
+ memcpy(T, Torg, 16);
+ memcpy(in + BAD_ALIGN, data->CTX, data->PTLEN);
+ xts_decrypt(&aesdata, &aestweak,
+ test_xts_aes_encrypt,
+ test_xts_aes_decrypt,
+ T, data->PTLEN, out, in + BAD_ALIGN);
+
+ g_assert(memcmp(out, data->PTX, data->PTLEN) == 0);
+
+ /* plain text not aligned */
+ memcpy(T, Torg, 16);
+ memcpy(in, data->CTX, data->PTLEN);
+ xts_decrypt(&aesdata, &aestweak,
+ test_xts_aes_encrypt,
+ test_xts_aes_decrypt,
+ T, data->PTLEN, out + BAD_ALIGN, in);
+
+ g_assert(memcmp(out + BAD_ALIGN, data->PTX, data->PTLEN) == 0);
+}
+
+
int main(int argc, char **argv)
{
size_t i;
@@ -437,6 +519,10 @@ int main(int argc, char **argv)
g_test_add_data_func(path, &test_data[i], test_xts_split);
g_free(path);
}
+
+ path = g_strdup_printf("%s/unaligned", test_data[i].path);
+ g_test_add_data_func(path, &test_data[i], test_xts_unaligned);
+ g_free(path);
}
return g_test_run();
--
2.17.2