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