text: #ifndef BASE64_H
  #define BASE64_H
  
  #include <openssl/bio.h>
  #include <openssl/buffer.h>
  #include <openssl/evp.h>
  
  #include <math.h>
  #include <stdio.h>
  #include <string.h>
  
  char* base64Encode(const unsigned char *buffer, const size_t length);
  int base64Decode(const char *b64message, const size_t length, unsigned char **buffer);
  int calcDecodeLength(const char *b64input, const size_t length);
  
  #endif
  