mirror of
https://git.soft.fish/val/MicroCorruption.git
synced 2024-11-22 19:05:59 +00:00
65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
|
|
// uC includes
|
|
#include "../common/io.c"
|
|
#include "../common/lib.c"
|
|
|
|
typedef unsigned char u8;
|
|
typedef unsigned short u16;
|
|
|
|
const char * HEX_LUT = "0123456789ABCDEF";
|
|
|
|
int main () {
|
|
u8 *buf = (mem + 0x2400); // >=> 0x2400
|
|
u8 sha_buf[0x20]; // >=> sp
|
|
|
|
puts("Welcome to the test program loader.");
|
|
|
|
puts ("Enabling hardened mode");
|
|
INT (0x40);
|
|
|
|
puts ("Verifying 0x7f interrupt disabled");
|
|
INT (0x7f);
|
|
|
|
puts ("0x7f interrupt disabled, key stored in internal SRAM");
|
|
puts ("unlock by providing the 16 byte key to 0x41 interrupt");
|
|
|
|
memset (&sha_buf, 0, 0x20);
|
|
puts ("Internal SRAM Hash:");
|
|
// address, size, out_buf
|
|
sha256_internal (0, 0x1000, (char*) &sha_buf);
|
|
|
|
addr_44aa:
|
|
for (int i /* r11 */ = 0; i != 0x20; i++) {
|
|
u8 upper_nibble /* r14 */ = sha_buf[i];
|
|
char lower_char /* r11 */ = HEX_LUT[upper_nibble & 0xf];
|
|
upper_nibble /* r14 */ = (upper_nibble >> 0x4) & 0xf;
|
|
putchar (HEX_LUT[upper_nibble]);
|
|
putchar (lower_char);
|
|
}
|
|
puts (""); // prints newline
|
|
|
|
while (1) {
|
|
u16 loadaddr /* r11 */;
|
|
u8 len /* r10 */;
|
|
puts ("Please enter debug payload.");
|
|
|
|
memset (buf, 0, 0x400);
|
|
getsn (buf, 0x3ff);
|
|
|
|
loadaddr = (buf[0] << 8) + (buf[1]);
|
|
len = buf[3];
|
|
|
|
// the program no longer checks the load address location or alignment
|
|
if (len - 6 > 0x3bb) {
|
|
puts ("Invalid payload length");
|
|
continue;
|
|
}
|
|
|
|
puts ("Executing debug payload");
|
|
memcpy (mem + loadaddr, buf + 0x4, len);
|
|
|
|
// todo: *loadaddr ();
|
|
|
|
}
|
|
}
|