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, 12 insertions, 14 deletions

diff --git a/utils/nwztools/upgtools/mg.cpp b/utils/nwztools/upgtools/mg.cpp
index f02b673..7903970 100644
--- a/utils/nwztools/upgtools/mg.cpp
+++ b/utils/nwztools/upgtools/mg.cpp
@@ -28,43 +28,41 @@
 using namespace CryptoPP;
 namespace
 {
-    inline int dec_des_ecb(void *in, int size, void *out, uint8_t *key)
+    inline void dec_des_ecb(void *in, int size, void *out, uint8_t *key)
     {
         ECB_Mode< DES >::Decryption dec;
         if(size % 8)
-            return 42;
+            abort(); /* size must be a multiple of 8 */
         dec.SetKey(key, 8);
         dec.ProcessData((byte*)out, (byte*)in, size);
-        return 0;
     }
 
-    inline int enc_des_ecb(void *in, int size, void *out, uint8_t *key)
+    inline void enc_des_ecb(void *in, int size, void *out, uint8_t *key)
     {
         ECB_Mode< DES >::Encryption enc;
         if(size % 8)
-            return 42;
+            abort(); /* size must be a multiple of 8 */
         enc.SetKey(key, 8);
         enc.ProcessData((byte*)out, (byte*)in, size);
-        return 0;
     }
 }
 
-int mg_decrypt_fw(void *in, int size, void *out, uint8_t *key)
+void mg_decrypt_fw(void *in, int size, void *out, uint8_t *key)
 {
-    return dec_des_ecb(in, size, out, key);
+    dec_des_ecb(in, size, out, key);
 }
 
-int mg_encrypt_fw(void *in, int size, void *out, uint8_t *key)
+void mg_encrypt_fw(void *in, int size, void *out, uint8_t *key)
 {
-    return enc_des_ecb(in, size, out, key);
+    enc_des_ecb(in, size, out, key);
 }
 
-int mg_decrypt_pass(void *in, int size, void *out, uint8_t *key)
+void mg_decrypt_pass(void *in, int size, void *out, uint8_t *key)
 {
-    return dec_des_ecb(in, size, out, key);
+    dec_des_ecb(in, size, out, key);
 }
 
-int mg_encrypt_pass(void *in, int size, void *out, uint8_t *key)
+void mg_encrypt_pass(void *in, int size, void *out, uint8_t *key)
 {
-    return enc_des_ecb(in, size, out, key);
+    enc_des_ecb(in, size, out, key);
 }