devilutionX/Source/codec.h

//HEADER_GOES_HERE

int __fastcall codec_decode(void *pbSrcDst, int size, char *pszPassword);
void __fastcall codec_init_key(int unused, char *pszPassword);
int __fastcall codec_get_encoded_len(int dwSrcBytes);
void __fastcall codec_encode(void *pbSrcDst, int size, int size_64, char *pszPassword);