VOID rc4_init(PRC4Ext pRC4, PBYTE pbyKey, UINT cbKey_len)
{
- UINT ust1, ust2;
- UINT keyindex;
- UINT stateindex;
- PBYTE pbyst;
- UINT idx;
+ UINT ust1, ust2;
+ UINT keyindex;
+ UINT stateindex;
+ PBYTE pbyst;
+ UINT idx;
- pbyst = pRC4->abystate;
- pRC4->ux = 0;
- pRC4->uy = 0;
- for (idx = 0; idx < 256; idx++)
- pbyst[idx] = (BYTE)idx;
- keyindex = 0;
- stateindex = 0;
- for (idx = 0; idx < 256; idx++) {
- ust1 = pbyst[idx];
- stateindex = (stateindex + pbyKey[keyindex] + ust1) & 0xff;
- ust2 = pbyst[stateindex];
- pbyst[stateindex] = (BYTE)ust1;
- pbyst[idx] = (BYTE)ust2;
- if (++keyindex >= cbKey_len)
- keyindex = 0;
- }
+ pbyst = pRC4->abystate;
+ pRC4->ux = 0;
+ pRC4->uy = 0;
+ for (idx = 0; idx < 256; idx++)
+ pbyst[idx] = (BYTE)idx;
+ keyindex = 0;
+ stateindex = 0;
+ for (idx = 0; idx < 256; idx++) {
+ ust1 = pbyst[idx];
+ stateindex = (stateindex + pbyKey[keyindex] + ust1) & 0xff;
+ ust2 = pbyst[stateindex];
+ pbyst[stateindex] = (BYTE)ust1;
+ pbyst[idx] = (BYTE)ust2;
+ if (++keyindex >= cbKey_len)
+ keyindex = 0;
+ }
}
UINT rc4_byte(PRC4Ext pRC4)
{
- UINT ux;
- UINT uy;
- UINT ustx, usty;
- PBYTE pbyst;
+ UINT ux;
+ UINT uy;
+ UINT ustx, usty;
+ PBYTE pbyst;
- pbyst = pRC4->abystate;
- ux = (pRC4->ux + 1) & 0xff;
- ustx = pbyst[ux];
- uy = (ustx + pRC4->uy) & 0xff;
- usty = pbyst[uy];
- pRC4->ux = ux;
- pRC4->uy = uy;
- pbyst[uy] = (BYTE)ustx;
- pbyst[ux] = (BYTE)usty;
+ pbyst = pRC4->abystate;
+ ux = (pRC4->ux + 1) & 0xff;
+ ustx = pbyst[ux];
+ uy = (ustx + pRC4->uy) & 0xff;
+ usty = pbyst[uy];
+ pRC4->ux = ux;
+ pRC4->uy = uy;
+ pbyst[uy] = (BYTE)ustx;
+ pbyst[ux] = (BYTE)usty;
- return pbyst[(ustx + usty) & 0xff];
+ return pbyst[(ustx + usty) & 0xff];
}
VOID rc4_encrypt(PRC4Ext pRC4, PBYTE pbyDest,
- PBYTE pbySrc, UINT cbData_len)
+ PBYTE pbySrc, UINT cbData_len)
{
- UINT ii;
- for (ii = 0; ii < cbData_len; ii++)
- pbyDest[ii] = (BYTE)(pbySrc[ii] ^ rc4_byte(pRC4));
+ UINT ii;
+ for (ii = 0; ii < cbData_len; ii++)
+ pbyDest[ii] = (BYTE)(pbySrc[ii] ^ rc4_byte(pRC4));
}