convert char* interface to std::string

Hello, I would like to have someone convert this class: <[login to view URL]> from a char* interface to a std::string interface. Specifically I would like to have the following methods changed from: void Encrypt(char const* in, char* result, size_t n, int iMode=ECB); void Decrypt(char const* in, char* result, size_t n, int iMode=ECB); to: string Encrypt(const string in, int iMode=ECB); string Decrypt(const string in, int iMode=ECB); - They have use examples on the site. I am interested in the examples for the larger blocks of data (48 bytes) working. - Thank you