Leave behaviour on NULL input unspecified in ARIA
We allow a NULL input buffer if the input length is zero,
but we don't test it. As long as that's the case, we shouldn't
promise to support it.
@@ -200,10 +200,10 @@ int mbedtls_aria_crypt_ecb( mbedtls_aria_context *ctx,
* multiple of the block size (16 Bytes).
* \param iv Initialization vector (updated after use).
* This must be a readable buffer of size 16 Bytes.
- * \param input The buffer holding the input data.
- * This may be \c NULL if `length == 0`.
- * \param output The buffer holding the output data.
- * This may be \c NULL if `length == 0`.
+ * \param input The buffer holding the input data. This must
+ * be a readable buffer of length \p length Bytes.
+ * \param output The buffer holding the output data. This must
+ * be a writable buffer of length \p length Bytes.
*
* \return \c 0 on success.
* \return A negative error code on failure.
@@ -250,10 +250,10 @@ int mbedtls_aria_crypt_cbc( mbedtls_aria_context *ctx,
* This must not be larger than 15.
* \param iv The initialization vector (updated after use).
* This must be a readable buffer of size 16 Bytes.
- * \param input The buffer holding the input data.
- * This may be \c NULL if `length == 0`.
- * \param output The buffer holding the output data.
- * This may be \c NULL if `length == 0`.
+ * \param input The buffer holding the input data. This must
+ * be a readable buffer of length \p length Bytes.
+ * \param output The buffer holding the output data. This must
+ * be a writable buffer of length \p length Bytes.
*
* \return \c 0 on success.
* \return A negative error code on failure.
@@ -337,10 +337,10 @@ int mbedtls_aria_crypt_cfb128( mbedtls_aria_context *ctx,
* \param stream_block The saved stream block for resuming. This must
* point to a read/write buffer of length \c 16 bytes.
* This is overwritten by the function.
- * \param input The buffer holding the input data.
- * This may be \c NULL if `length == 0`.
- * \param output The buffer holding the output data.
- * This may be \c NULL if `length == 0`.
+ * \param input The buffer holding the input data. This must
+ * be a readable buffer of length \p length Bytes.
+ * \param output The buffer holding the output data. This must
+ * be a writable buffer of length \p length Bytes.
*
* \return \c 0 on success.
* \return A negative error code on failure.
