Hello, I was wondering what is the purpose of wrappers like this one: /*! * \brief Small wrapper around MD5Update * * Small wrapper around MD5Update, because everybody uses this on 'str' types * \param context MD5 context * \param input input block * \param inputLen length of input block * \note please not use this in new code * \todo review and fix all wrong usage */ static inline void MD5Update (MD5_CTX *context, char *input, unsigned int inputLen) { return U_MD5Update(context, (unsigned char *)input, inputLen); } And this is U_MD5Update: void U_MD5Update (MD5_CTX *context, unsigned char *input, unsigned int inputLen) Jan.