nwztools: cleanup crypto, switch MD5 to Crypto++

We already use Crypto++ for DES anyway, and using OpenSSL is not great because
of its incompatible licence.

Change-Id: I78771b84c1708795a0c0c30afa5bdfe4885dea4e

1 files changed, 5 insertions, 3 deletions

diff --git a/utils/nwztools/upgtools/fwp.h b/utils/nwztools/upgtools/fwp.h
index 0d928fb..32fe260 100644
--- a/utils/nwztools/upgtools/fwp.h
+++ b/utils/nwztools/upgtools/fwp.h
@@ -33,11 +33,13 @@ extern "C" {
 #define NWZ_SIG_SIZE    8
 #define NWZ_EXPKEY_SIZE (NWZ_KEY_SIZE * NWZ_KEY_SIZE)
 #define NWZ_DES_BLOCK   8
+#define NWZ_MD5_SIZE    16
 
-int fwp_read(void *in, int size, void *out, uint8_t *key);
-int fwp_write(void *in, int size, void *out, uint8_t *key);
+/* size must be a multiple of 8 */
+void fwp_read(void *in, int size, void *out, uint8_t *key);
+void fwp_write(void *in, int size, void *out, uint8_t *key);
 void fwp_setkey(char key[8]);
-int fwp_crypt(void *buf, int size, int mode);
+void fwp_crypt(void *buf, int size, int mode);
 
 #ifdef __cplusplus
 }