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test: Check empty buffer decryption for chachapoly

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Previously, even in the Chacha20 and Chacha20-Poly1305 tests, we would
test that decryption of an empty buffer would work with
MBEDTLS_CIPHER_AES_128_CBC.

Make the cipher used with the dec_empty_buf() test configurable, so that
Chacha20 and Chacha20-Poly1305 empty buffer tests can use ciphers other
than AES CBC. Then, make the Chacha20 and Chacha20-Poly1305 empty buffer
tests use the MBEDTLS_CIPHER_CHACHA20 and
MBEDTLS_CIPHER_CHACHA20_POLY1305 cipher suites.
This commit is contained in:
Jaeden Amero 2019-06-05 15:35:08 +01:00
parent 08f363baa9
commit 4e47aa0120
4 changed files with 28 additions and 8 deletions
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2
tests/suites/test_suite_cipher.aes.data
View file

@ -1,6 +1,6 @@
Decrypt empty buffer
depends_on:MBEDTLS_AES_C:MBEDTLS_CIPHER_MODE_CBC:MBEDTLS_CIPHER_PADDING_PKCS7
dec_empty_buf:
dec_empty_buf:MBEDTLS_CIPHER_AES_128_CBC
AES-128 CBC - Encrypt and decrypt 0 bytes with PKCS7 padding
depends_on:MBEDTLS_AES_C:MBEDTLS_CIPHER_MODE_CBC:MBEDTLS_CIPHER_PADDING_PKCS7

2
tests/suites/test_suite_cipher.chacha20.data
View file

@ -1,6 +1,6 @@
Decrypt empty buffer
depends_on:MBEDTLS_CHACHA20_C
dec_empty_buf:
dec_empty_buf:MBEDTLS_CIPHER_CHACHA20
Chacha20 RFC 7539 Test Vector #1
depends_on:MBEDTLS_CHACHA20_C

2
tests/suites/test_suite_cipher.chachapoly.data
View file

@ -1,6 +1,6 @@
Decrypt empty buffer
depends_on:MBEDTLS_CHACHAPOLY_C
dec_empty_buf:
dec_empty_buf:MBEDTLS_CIPHER_CHACHA20_POLY1305
ChaCha20+Poly1305 Encrypt and decrypt 0 bytes
depends_on:MBEDTLS_CHACHAPOLY_C

30
tests/suites/test_suite_cipher.function
View file

@ -710,7 +710,7 @@ exit:
/* END_CASE */
/* BEGIN_CASE */
void dec_empty_buf( )
void dec_empty_buf( int cipher )
{
unsigned char key[32];
unsigned char iv[16];
@ -723,6 +723,8 @@ void dec_empty_buf( )
size_t outlen = 0;
int expected_ret;
memset( key, 0, 32 );
memset( iv , 0, 16 );
@ -732,12 +734,15 @@ void dec_empty_buf( )
memset( decbuf, 0, 64 );
/* Initialise context */
cipher_info = mbedtls_cipher_info_from_type( MBEDTLS_CIPHER_AES_128_CBC );
cipher_info = mbedtls_cipher_info_from_type( cipher );
TEST_ASSERT( NULL != cipher_info);
TEST_ASSERT( sizeof(key) * 8 >= cipher_info->key_bitlen );
TEST_ASSERT( 0 == mbedtls_cipher_setup( &ctx_dec, cipher_info ) );
TEST_ASSERT( 0 == mbedtls_cipher_setkey( &ctx_dec, key, 128, MBEDTLS_DECRYPT ) );
TEST_ASSERT( 0 == mbedtls_cipher_setkey( &ctx_dec,
key, cipher_info->key_bitlen,
MBEDTLS_DECRYPT ) );
TEST_ASSERT( 0 == mbedtls_cipher_set_iv( &ctx_dec, iv, 16 ) );
@ -750,8 +755,23 @@ void dec_empty_buf( )
/* decode 0-byte string */
TEST_ASSERT( 0 == mbedtls_cipher_update( &ctx_dec, encbuf, 0, decbuf, &outlen ) );
TEST_ASSERT( 0 == outlen );
TEST_ASSERT( MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED == mbedtls_cipher_finish(
&ctx_dec, decbuf + outlen, &outlen ) );
if ( cipher_info->mode == MBEDTLS_MODE_CBC ||
cipher_info->mode == MBEDTLS_MODE_ECB )
{
/* CBC and ECB ciphers need a full block of input. */
expected_ret = MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED;
}
else
{
/* Non-CBC and non-ECB ciphers are OK with decrypting empty buffers and
* return success, not MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED, when
* decrypting an empty buffer. */
expected_ret = 0;
}
TEST_ASSERT( expected_ret == mbedtls_cipher_finish(
&ctx_dec, decbuf + outlen, &outlen ) );
TEST_ASSERT( 0 == outlen );
exit: