《BMP信息隐藏.docVIP

#include stdio.h #include stdlib.h #include string.h #define HEAP_UNITSIZE (102400) #define HEAP_INITUNITS (1) #define LOOKUP_INITLEN (2048) #define FALSE (0) #define TRUE (-1) #define PATH_SEP (\\) /* OS Specific Path Seperator */ #define BANNER (BlindSide BMP Cryptographic Tool - (c) John Collomosse 2000\nRelease v0.9. All Rights Reserved, contact: ma7jpc@bath.ac.uk\n\n) #define THIS_PROTO_VER (1) typedef struct heapstruct { unsigned int heapunits; unsigned char *datASPace; unsigned char *nextchar; unsigned long heaplen; } HEAP; typedef struct lookupstruct { unsigned long int* dataspace; unsigned long int currentlen; unsigned long int curitem; } LOOKUP; typedef struct bmpstruct { char* signature; long filesize; long x_size; long y_size; int bitplanes; int bpp; long compression; long compresssize; long x_pix_per_metre; long y_pix_per_metre; long colours; long cols_important; HEAP* palette; HEAP* raster; } BITMAP; typedef struct pixstruct { unsigned char red; unsigned char green; unsigned char blue; } PIXEL; int initialiseHeap (HEAP*); int expandHeap (int, HEAP*); void removeHeap (HEAP*); int putToHeap (unsigned char,HEAP*); int streamFileToHeap (FILE*, HEAP*); int readBitmapFile (FILE*, BITMAP*); void promoteTo24 (BITMAP*, BITMAP*); unsigned long resolveMaxEncode (BITMAP*, LOOKUP*); void writeBitmapFile (FILE*, BITMAP*); unsigned int biggest_of_3 (unsigned int,unsigned int,unsigned int); void longToStream (FILE*,unsigned long int); unsigned long streamToLong (FILE*); void process24gotpixel (unsigned char, unsigned char*,HEAP*); unsigned int calcEOLpad (int, long); PIXEL getIndexedPixel (unsigned long int, BITMAP*); void encodeData (BITMAP*, HEAP*, LOOKUP*); void setIndexedPixel (unsigned long int, BITMAP*, PIXEL); unsigned char getNextHeaPBit (unsigned long int, int, HEAP*); int decodeData (BITMAP*, HEAP*); void cryptoData (HEAP* data, unsigned char* key); unsigned char xor (unsigned char, unsigned char); int rotl4 (int); int hash_func (unsigned char*); in