test: Check empty buffer decryption for chachapoly
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.
diff --git a/tests/suites/test_suite_cipher.chachapoly.data b/tests/suites/test_suite_cipher.chachapoly.data
index 9d74d56..61c4851 100644
--- a/tests/suites/test_suite_cipher.chachapoly.data
+++ b/tests/suites/test_suite_cipher.chachapoly.data
@@ -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