/* Decode RC4 data. Return 1 if data matches decoded data. */
int MatchDecryptedRC4(
const u_int8_t *key, u_int16_t keylen, const u_int8_t *encrypted_data,
u_int8_t *match_data, u_int16_t datalen
) {
u_int16_t i;
u_int8_t t, tmp;
static char decrypted_data[MAX_DATA_LEN];
u_int8_t s[256] = {
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b,
0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23,
0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b,
0x3c, 0x3d, 0x3e, 0x3f, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52, 0x53,
0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b,
0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, 0x80, 0x81, 0x82, 0x83,
0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b,
0x9c, 0x9d, 0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, 0xb0, 0xb1, 0xb2, 0xb3,
0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xcb,
0xcc, 0xcd, 0xce, 0xcf, 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, 0xe0, 0xe1, 0xe2, 0xe3,
0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb,
0xfc, 0xfd, 0xfe, 0xff
};
/* Make sure our buffer is big enough to do the decode */
if ( datalen > MAX_DATA_LEN )
return 0;
/* Initialize the state array with given key */
t = 0;
for(i = 0; i < 256; i++) {
t += s[i] + key[i % keylen];
BYTESWAP(s[i], s[t])
}
/* Decrypt data */
t = 0;
for (i = 0; i < datalen; i++) {
int idx = (i+1)%256;
t += s[idx];
BYTESWAP(s[idx], s[t])
decrypted_data[i] = encrypted_data[i] ^ s[((s[idx] + s[t]) % 256)];
}
/* Check for data match */
if (!memcmp(match_data, decrypted_data, datalen)) {
return 1;
}
return 0;
}
/*
* Prepare a USB control request. Please see USB 2.0 spec section 9.4.
*/
static void
prepare_usb_control_req(usb_request_t * req, uint8_t bmRequestType,
uint8_t bRequest, uint16_t wValue, uint16_t wIndex,
uint16_t wLength)
{
(*req).bmRequestType = bmRequestType;
(*req).bRequest = bRequest;
#ifdef _BIG_ENDIAN
/* Sparc is big endian, USB little endian */
(*req).wValue = BYTESWAP(wValue);
(*req).wIndex = BYTESWAP(wIndex);
(*req).wLength = BYTESWAP(wLength);
#else
(*req).wValue = wValue;
(*req).wIndex = wIndex;
(*req).wLength = wLength;
#endif /* _BIG_ENDIAN */
}
struct targa * loadTarga(char filename[]) {
int x, y;
uchar * dst;
int pelsize;
uint pixel;
struct targa * image = malloc(sizeof(struct targa));
FILE * imagefile = fopen(filename,"rb");
if (image==NULL) {
printf("Failed to allocate TARGA resource.\n");
return NULL;
}
if (imagefile==NULL) {
printf("Failed to open %s.\n",filename);
return NULL;
}
/* Read in file header */
fread(image, 1, sizeof(struct targa)-2*sizeof(void *)-2, imagefile);
#ifdef BIGENDIAN
image->width = BYTESWAP(image->width);
image->height = BYTESWAP(image->height);
#endif
/* No greyscale, 8bpp indexed or RGB type image? */
if ((image->type!=0x01)&&(image->type!=0x02)&&(image->type!=0x03))
return NULL;
/* RGB type but not 24bpp? */
if ((image->type==0x02)&&(image->bits!=24)) return NULL;
/* Load color ramp (if any) */
if ((image->hasclut)||(image->type==0x01)) {
if ((image->clut=malloc((1<<image->bits)*sizeof(struct rgb)))==NULL)
return NULL;
else
fread(image->clut,1<<image->bits,sizeof(struct rgb),imagefile);
}
/* 8bpp greyscale? */
if (image->type==0x03)
pelsize = 1*sizeof(uchar);
else
pelsize = 3*sizeof(uchar);
if ((image->pels = malloc(image->width*image->height*pelsize))==NULL)
return NULL;
/* 24bpp RGB */
if (image->bits==24) {
for (y=image->height-1;y>=0;y--) {
dst = &image->pels[y*image->width*sizeof(uchar)];
for (x=0;x<image->width;x++) {
/* Read R, G and B layer */
dst[2*image->height*image->width*sizeof(uchar)] = getc(imagefile);
dst[image->height*image->width*sizeof(uchar)] = getc(imagefile);
*dst++ = getc(imagefile);
}
}
}
/* 8bpp greyscale */
else if (image->type==0x03) {
dst=&image->pels[image->width*sizeof(uchar)*(image->bits/8)*(image->height-1)];
do {
fread(dst,image->width*sizeof(uchar),sizeof(uchar),imagefile);
} while ((dst-= image->width*sizeof(uchar)) >= image->pels);
}
/* 8bpp colormapped -> convert to 24bpp RGB*/
else {
for (y=image->height-1;y>=0;y--) {
dst = &image->pels[y*image->width*sizeof(uchar)];
for (x=0;x<image->width;x++) {
pixel = getc(imagefile);
dst[2*image->height*image->width*sizeof(uchar)] = image->clut[pixel].b;
dst[image->height*image->width*sizeof(uchar)] = image->clut[pixel].g;
*dst++ = image->clut[pixel].r;
}
}
}
fclose(imagefile);
return image;
}
void saveTGA(struct biqstruct * biq, struct targa * tga, char filename[]) {
uint i;
int x,y;
uchar * src;
FILE * file = fopen(filename,"wb");
/* Type conversion table */
const uchar tgatypes[4] = { 0x03, 0x01, 0x02, 0x02 };
const uchar biqbpp[4] = { 8, 8, 24, 24 };
if (file==NULL) {
printf("Failed to create %s.\n",filename);
return;
}
memset(tga, 0 , sizeof(struct targa)-2*sizeof(void *)-2);
tga->type = tgatypes[biq->type];
/* Bugfix: set CLUT properties */
if (tga->type==0x01) {
tga->hasclut = 0x01;
tga->clutstart = 0x0000;
tga->clutlen = 0x1801; /* This is very weird, but it seems to work */
}
tga->width = biq->width;
tga->height = biq->height;
tga->bits = biqbpp[biq->type];
#ifdef BIGENDIAN
/* tga->clutstart = BYTESWAP(tga->clutstart); /* = 0, either way */
tga->clutlen = BYTESWAP(tga->clutlen);
tga->width = BYTESWAP(tga->width);
tga->height = BYTESWAP(tga->height);
#endif
/* Write file header, this works on both big and little endian machines */
fwrite(tga, 1, sizeof(struct targa)-2*sizeof(void *)-2, file);
/* Color mapped filetype? */
if (tga->type==0x01) {
/* Write out color map to file */
for (i=0;i<NUM_COLORS;i++) {
putc(biq->clut[i].b,file);
putc(biq->clut[i].g,file);
putc(biq->clut[i].r,file);
}
}
/* Perform inverse Wavelet transform */
retransform(biq,tga,L);
/* Save image (bottom to top)*/
/* 24bpp */
if (tga->bits==24) {
for (y=biq->height-1;y>=0;y--) {
src = &biq->coeff[y*biq->width*sizeof(uchar)];
for (x=0;x<biq->width;x++) {
/* Write B, G and R layers in interlaved order*/
putc(src[2*biq->height*biq->width*sizeof(uchar)],file);
putc(src[biq->height*biq->width*sizeof(uchar)],file);
putc(*src++,file);
}
}
}
/* 8bpp */
else {
src=&biq->coeff[biq->width*sizeof(uchar)*(biq->height-1)];
do {
fwrite(src,biq->width*sizeof(uchar),sizeof(uchar),file);
} while ((src -= biq->width*sizeof(uchar)) >= biq->coeff);
}
fclose(file);
}
uint64_t netByteOrder64 (uint64_t value) {
uint64_t ret;
BYTESWAP(ret, value);
return ret;
}
uint32_t netByteOrder32 (uint32_t value) {
uint32_t ret;
BYTESWAP(ret, value);
return ret;
}
uint16_t netByteOrder16 (uint16_t value) {
uint16_t ret;
BYTESWAP(ret, value);
return ret;
}
