求C语言（不是C++）编写的AES加密程序，能在C-FREE里运行 简单就好 求能用

char keyMaterial[256];
int cnt = 0;
while(cnt < keylen/8) {
for (j = 0; rawkey[j]; j++) {
idx = j % (keylen/8);
ctmp = rawkey[idx];
if (idx != j)
ctmp = rawkey[idx] ^ rawkey[j];
ctmp += cnt;
mdx = (cnt + idx) % (keylen/8);
keyMaterial[2*mdx] = ((tmp=ctmp/16)>9)? tmp+'A'-10 : tmp+'0';
keyMaterial[2*mdx+1] = ((tmp=ctmp%16)>9)? tmp+'A'-10 : tmp+'0';
}
cnt += j;
}
keyMaterial[keylen/4] = 0;追问

？？？