/**//********************************************************************   passwd:            Password  -> Shared secret   in:                source file name (clear text)   out:               target file name (cipher text)   return:            0 | 1          ; successful | failure**/int PBE_EncryptFile(char* passwd,const char* in,const char* out);/********************************************************************   passwd:            Password -> Shared secret   in:                source file name (cipher text)   out:               target file name (clear text)   return:            0 | 1          ; successful | failure**/int PBE_DecryptFile(char* passwd,const char* in,const char* out);