mirror of
https://github.com/fail0verflow/mini.git
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123 lines
2.5 KiB
C
123 lines
2.5 KiB
C
#include "types.h"
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#include "nand.h"
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#include "memory.h"
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#include "crypto.h"
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#include "string.h"
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#include "gecko.h"
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#include "powerpc.h"
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static u8 boot2[256 << 11] MEM2_BSS __attribute__((aligned(64)));
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static u8 key[32] MEM2_BSS __attribute__((aligned(64)));
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static u8 ecc[64] __attribute__((aligned(64)));
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static u8 boot2_initialized = 0;
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extern void *vector;
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struct wadheader {
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u32 len;
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u32 type;
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u32 certs_len;
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u32 tik_len;
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u32 tmd_len;
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u32 reserved; // ??
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u32 data_len; // ??
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u32 footer_len; // ??
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};
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typedef struct {
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u32 hdrsize;
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u32 loadersize;
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u32 elfsize;
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u32 argument;
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} ioshdr;
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void boot2_init() {
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int i;
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void *ptr = boot2;
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u8 *tikptr = NULL;
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u8 *tmdptr = NULL;
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u8 *cntptr = NULL;
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u8 iv[16];
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struct wadheader *hdr = (struct wadheader *)boot2;
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u32 datalen;
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for (i = 0x40; i < 0x140; i++, ptr += 2048) {
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nand_read_page(i, ptr, ecc);
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__nand_wait();
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}
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if (hdr->len != sizeof(struct wadheader))
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return;
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tikptr = boot2 + hdr->len + hdr->certs_len;
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tmdptr = tikptr + hdr->tik_len;
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cntptr = ALIGN_FORWARD(tmdptr + hdr->tmd_len, 0x40);
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memset(iv, 0, 16);
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memcpy(iv, tikptr + 0x1dc, 8);
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aes_reset();
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aes_set_iv(iv);
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aes_set_key(otp.common_key);
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memcpy(key, tikptr+0x1bf, 16);
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gecko_puts("flushing now...\n");
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dc_flushrange(key, 32);
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gecko_puts("dc_flush done.\n");
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aes_decrypt(key, key, 1, 0);
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dc_invalidaterange(key, 32);
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memcpy(&datalen, tmdptr+0x1e4+8+4, 4);
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memset(iv, 0, 16);
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memcpy(iv, tmdptr + 0x1e4 + 4, 2);
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aes_reset();
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aes_set_iv(iv);
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aes_set_key(key);
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dc_flushrange(cntptr, ALIGN_FORWARD(datalen, 16));
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aes_decrypt(cntptr, cntptr, ALIGN_FORWARD(datalen, 16)/16, 0);
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dc_invalidaterange(cntptr, ALIGN_FORWARD(datalen, 16));
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memcpy(boot2, cntptr, datalen);
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boot2_initialized = 1;
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}
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static u32 match[] = {
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0xF7FFFFB8,
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0xBC024708,
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1,
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2,
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};
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static u32 patch[] = {
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0xF7FFFFB8,
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0xBC024708,
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0x10001,
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0x48415858,
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};
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int boot2_run(u32 tid_hi, u32 tid_lo) {
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void *ptr;
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int i;
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ioshdr *hdr = (ioshdr *)boot2;
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if (boot2_initialized != 1)
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return 0;
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patch[2] = tid_hi;
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patch[3] = tid_lo;
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powerpc_hang();
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memcpy((void *)0x11000000, boot2, sizeof boot2);
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ptr = (void *)0x11000000 + hdr->hdrsize + hdr->loadersize;
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for (i = 0; i < sizeof(boot2); i += 1) {
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if (memcmp(ptr+i, match, sizeof(match)) == 0) {
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memcpy(ptr+i, patch, sizeof(patch));
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gecko_printf("patched data @%08x\n", ptr+i);
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}
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}
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hdr = (ioshdr *)0x11000000;
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hdr->argument = 0x42;
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vector = (void *)0x11000000 + hdr->hdrsize;
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gecko_printf("boot2 is at %p\n", vector);
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return 1;
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}
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