Merge pull request #1809 from DanielNovak/fix-decrypt-block-alignment-check

Fix stack buffer overflow in MACThenDecrypt

src/Utils.h

@@ -50,7 +50,7 @@ public:
 
   /**
    * \brief  checks the MAC (in leading bytes of 'src'), then if valid, decrypts remaining bytes in src.
-   * \returns  zero if MAC is invalid, otherwise the length of decrypted bytes in 'dest'
+   * \returns  zero if MAC is invalid or ciphertext is not block-aligned, otherwise the length of decrypted bytes in 'dest'
   */
   static int MACThenDecrypt(const uint8_t* shared_secret, uint8_t* dest, const uint8_t* src, int src_len);