//romhack.wikia.com/wiki/SNES_ROM_layout
ImageAddress LoROMAddress::toImageAddress() const {
/// \todo: save-RAM (?)
uint32_t imageAddress = 0;
uint8_t bank = this->bank();
if(bank == 0x7E || bank == 0x7F) {
return ImageAddress(-1); //the address is actually a RAM address
} else {
//it is actually a ROM address
imageAddress = (bank & 0x7F)*0x10000/2+bankAddress()&0x7FFF;
}
return ImageAddress(imageAddress);
}
//romhack.wikia.com/wiki/SNES_ROM_layout
ImageAddress HiROMAddress::toImageAddress() const {
/// \todo: save-RAM (?)
uint32_t imageAddress = 0;
uint8_t bank = this->bank();
if(bank == 0x7E || bank == 0x7F) {
return ImageAddress(-1); //the address is actually a RAM address
} else {
//!TODO: save-RAM (?)
//it is actually a ROM address
imageAddress = m_Address & 0x3FFFFF;
if((bank & 0x7F) < 0x40) {
//mirrors 3 and 4 are only accepted in the upper half
assert(bankAddress() > 0x7FFF);
}
imageAddress = ((bank & 0x3F)<<16)+bankAddress();
}
return ImageAddress(imageAddress);
}
int
main(int argc, char *argv[])
{
if (argc < 3) {
fprintf(stderr, "usage: verify foo.efi cert0 [... certN]\n");
exit(1);
}
OpenSSL_add_all_algorithms();
ERR_load_PKCS7_strings();
ERR_load_crypto_strings();
int binfd = open(argv[1], O_RDONLY);
if (binfd < 0)
err(1, "verify: %s", argv[1]);
struct stat sb;
fstat(binfd, &sb);
void *bin = mmap(NULL, sb.st_size, PROT_READ, MAP_PRIVATE, binfd, 0);
size_t bin_size = sb.st_size;
PE_COFF_LOADER_IMAGE_CONTEXT context;
int rc = read_header(bin, sb.st_size, &context);
if (rc < 0) {
fprintf(stderr, "read_header(): %m\n");
exit(1);
}
UINT8 sha256hash[32];
rc = generate_hash(bin, sb.st_size, &context, sha256hash);
if (rc < 0) {
fprintf(stderr, "you can't handle a hash\n");
exit(1);
}
WIN_CERTIFICATE_EFI_PKCS *efi_pkcs = NULL;
if (context.SecDir->Size != 0) {
efi_pkcs = ImageAddress(bin, bin_size,
context.SecDir->VirtualAddress);
if (!efi_pkcs) {
fprintf(stderr, "signature is at invalid "
"offset\n");
exit(1);
}
}
int found = 0;
for (int i = 2; argv[i] != NULL; i++) {
int fd = open(argv[i], O_RDONLY);
if (fd < 0)
err(1, "verify: %s", argv[i]);
printf("adding cert from \"%s\"\n", argv[i]);
uint8_t *cert;
struct stat sb;
fstat(fd, &sb);
cert = mmap(NULL, sb.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
size_t cert_size = sb.st_size;
rc = AuthenticodeVerify((UINT8 *)&efi_pkcs->CertData,
efi_pkcs->Hdr.dwLength - sizeof(efi_pkcs->Hdr),
cert, cert_size,
sha256hash, 32);
if (rc == 1) {
found = 1;
break;
}
char errbuf[120];
unsigned long err = ERR_get_error();
ERR_error_string(err, errbuf);
printf("%s\n", errbuf);
munmap(cert, sb.st_size);
close(fd);
}
if (!found) {
fprintf(stderr, "verify failed!\n");
exit(1);
}
printf("Image verifies correctly\n");
return 0;
}