static void test_verify_fw_preamble(const VbPublicKey *public_key,
const VbPrivateKey *private_key,
const VbPublicKey *kernel_subkey)
{
struct vb2_fw_preamble *hdr;
struct vb2_fw_preamble *h;
struct vb2_public_key rsa;
uint8_t workbuf[VB2_VERIFY_FIRMWARE_PREAMBLE_WORKBUF_BYTES]
__attribute__ ((aligned (VB2_WORKBUF_ALIGN)));
struct vb2_workbuf wb;
uint32_t hsize;
vb2_workbuf_init(&wb, workbuf, sizeof(workbuf));
/* Create a dummy signature */
VbSignature *body_sig = SignatureAlloc(56, 78);
TEST_SUCC(vb2_unpack_key(&rsa, (uint8_t *)public_key,
public_key->key_offset + public_key->key_size),
"vb2_verify_fw_preamble() prereq key");
hdr = (struct vb2_fw_preamble *)
CreateFirmwarePreamble(0x1234, kernel_subkey, body_sig,
private_key, 0x5678);
TEST_PTR_NEQ(hdr, NULL,
"VerifyFirmwarePreamble() prereq test preamble");
if (!hdr)
return;
hsize = (uint32_t) hdr->preamble_size;
h = (struct vb2_fw_preamble *)malloc(hsize + 16384);
Memcpy(h, hdr, hsize);
TEST_SUCC(vb2_verify_fw_preamble(h, hsize, &rsa, &wb),
"vb2_verify_fw_preamble() ok using key");
Memcpy(h, hdr, hsize);
TEST_EQ(vb2_verify_fw_preamble(h, 4, &rsa, &wb),
VB2_ERROR_PREAMBLE_TOO_SMALL_FOR_HEADER,
"vb2_verify_fw_preamble() size tiny");
Memcpy(h, hdr, hsize);
TEST_EQ(vb2_verify_fw_preamble(h, hsize - 1, &rsa, &wb),
VB2_ERROR_PREAMBLE_SIZE,
"vb2_verify_fw_preamble() size--");
/* Buffer is allowed to be bigger than preamble */
Memcpy(h, hdr, hsize);
TEST_SUCC(vb2_verify_fw_preamble(h, hsize + 1, &rsa, &wb),
"vb2_verify_fw_preamble() size++");
/* Care about major version but not minor */
Memcpy(h, hdr, hsize);
h->header_version_major++;
resign_fw_preamble(h, private_key);
TEST_EQ(vb2_verify_fw_preamble(h, hsize, &rsa, &wb),
VB2_ERROR_PREAMBLE_HEADER_VERSION
, "vb2_verify_fw_preamble() major++");
Memcpy(h, hdr, hsize);
h->header_version_major--;
resign_fw_preamble(h, private_key);
TEST_EQ(vb2_verify_fw_preamble(h, hsize, &rsa, &wb),
VB2_ERROR_PREAMBLE_HEADER_VERSION,
"vb2_verify_fw_preamble() major--");
Memcpy(h, hdr, hsize);
h->header_version_minor++;
resign_fw_preamble(h, private_key);
TEST_SUCC(vb2_verify_fw_preamble(h, hsize, &rsa, &wb),
"vb2_verify_fw_preamble() minor++");
Memcpy(h, hdr, hsize);
h->header_version_minor--;
resign_fw_preamble(h, private_key);
TEST_EQ(vb2_verify_fw_preamble(h, hsize, &rsa, &wb),
VB2_ERROR_PREAMBLE_HEADER_OLD,
"vb2_verify_fw_preamble() 2.0 not supported");
/* Check signature */
Memcpy(h, hdr, hsize);
h->preamble_signature.sig_offset = hsize;
resign_fw_preamble(h, private_key);
TEST_EQ(vb2_verify_fw_preamble(h, hsize, &rsa, &wb),
VB2_ERROR_PREAMBLE_SIG_OUTSIDE,
"vb2_verify_fw_preamble() sig off end");
Memcpy(h, hdr, hsize);
h->preamble_signature.sig_size--;
resign_fw_preamble(h, private_key);
TEST_EQ(vb2_verify_fw_preamble(h, hsize, &rsa, &wb),
VB2_ERROR_PREAMBLE_SIG_INVALID,
"vb2_verify_fw_preamble() sig too small");
Memcpy(h, hdr, hsize);
((uint8_t *)vb2_packed_key_data(&h->kernel_subkey))[0] ^= 0x34;
TEST_EQ(vb2_verify_fw_preamble(h, hsize, &rsa, &wb),
VB2_ERROR_PREAMBLE_SIG_INVALID,
"vb2_verify_fw_preamble() sig mismatch");
/* Check that we signed header, kernel subkey, and body sig */
Memcpy(h, hdr, hsize);
h->preamble_signature.data_size = 4;
h->kernel_subkey.key_offset = 0;
h->kernel_subkey.key_size = 0;
h->body_signature.sig_offset = 0;
h->body_signature.sig_size = 0;
resign_fw_preamble(h, private_key);
TEST_EQ(vb2_verify_fw_preamble(h, hsize, &rsa, &wb),
VB2_ERROR_PREAMBLE_SIGNED_TOO_LITTLE,
"vb2_verify_fw_preamble() didn't sign header");
Memcpy(h, hdr, hsize);
h->kernel_subkey.key_offset = hsize;
resign_fw_preamble(h, private_key);
TEST_EQ(vb2_verify_fw_preamble(h, hsize, &rsa, &wb),
VB2_ERROR_PREAMBLE_KERNEL_SUBKEY_OUTSIDE,
"vb2_verify_fw_preamble() kernel subkey off end");
Memcpy(h, hdr, hsize);
h->body_signature.sig_offset = hsize;
resign_fw_preamble(h, private_key);
TEST_EQ(vb2_verify_fw_preamble(h, hsize, &rsa, &wb),
VB2_ERROR_PREAMBLE_BODY_SIG_OUTSIDE,
"vb2_verify_fw_preamble() body sig off end");
/* TODO: verify with extra padding at end of header. */
free(h);
free(hdr);
}
static void test_verify_keyblock(const VbPublicKey *public_key,
const VbPrivateKey *private_key,
const VbPublicKey *data_key)
{
uint8_t workbuf[VB2_KEY_BLOCK_VERIFY_WORKBUF_BYTES]
__attribute__ ((aligned (VB2_WORKBUF_ALIGN)));
struct vb2_workbuf wb;
struct vb2_public_key key;
struct vb2_keyblock *hdr;
struct vb2_keyblock *h;
uint32_t hsize;
vb2_workbuf_init(&wb, workbuf, sizeof(workbuf));
/* Unpack public key */
TEST_SUCC(vb2_unpack_key(&key, (uint8_t *)public_key,
public_key->key_offset + public_key->key_size),
"vb2_verify_keyblock public key");
hdr = (struct vb2_keyblock *)
KeyBlockCreate(data_key, private_key, 0x1234);
TEST_NEQ((size_t)hdr, 0, "vb2_verify_keyblock() prerequisites");
if (!hdr)
return;
hsize = hdr->keyblock_size;
h = (struct vb2_keyblock *)malloc(hsize + 2048);
Memcpy(h, hdr, hsize);
TEST_SUCC(vb2_verify_keyblock(h, hsize, &key, &wb),
"vb2_verify_keyblock() ok using key");
Memcpy(h, hdr, hsize);
TEST_EQ(vb2_verify_keyblock(h, hsize - 1, &key, &wb),
VB2_ERROR_KEYBLOCK_SIZE, "vb2_verify_keyblock() size--");
/* Buffer is allowed to be bigger than keyblock */
Memcpy(h, hdr, hsize);
TEST_SUCC(vb2_verify_keyblock(h, hsize + 1, &key, &wb),
"vb2_verify_keyblock() size++");
Memcpy(h, hdr, hsize);
h->magic[0] &= 0x12;
TEST_EQ(vb2_verify_keyblock(h, hsize, &key, &wb),
VB2_ERROR_KEYBLOCK_MAGIC, "vb2_verify_keyblock() magic");
/* Care about major version but not minor */
Memcpy(h, hdr, hsize);
h->header_version_major++;
resign_keyblock(h, private_key);
TEST_EQ(vb2_verify_keyblock(h, hsize, &key, &wb),
VB2_ERROR_KEYBLOCK_HEADER_VERSION,
"vb2_verify_keyblock() major++");
Memcpy(h, hdr, hsize);
h->header_version_major--;
resign_keyblock(h, private_key);
TEST_EQ(vb2_verify_keyblock(h, hsize, &key, &wb),
VB2_ERROR_KEYBLOCK_HEADER_VERSION,
"vb2_verify_keyblock() major--");
Memcpy(h, hdr, hsize);
h->header_version_minor++;
resign_keyblock(h, private_key);
TEST_SUCC(vb2_verify_keyblock(h, hsize, &key, &wb),
"vb2_verify_keyblock() minor++");
Memcpy(h, hdr, hsize);
h->header_version_minor--;
resign_keyblock(h, private_key);
TEST_SUCC(vb2_verify_keyblock(h, hsize, &key, &wb),
"vb2_verify_keyblock() minor--");
/* Check signature */
Memcpy(h, hdr, hsize);
h->keyblock_signature.sig_offset = hsize;
resign_keyblock(h, private_key);
TEST_EQ(vb2_verify_keyblock(h, hsize, &key, &wb),
VB2_ERROR_KEYBLOCK_SIG_OUTSIDE,
"vb2_verify_keyblock() sig off end");
Memcpy(h, hdr, hsize);
h->keyblock_signature.sig_size--;
resign_keyblock(h, private_key);
TEST_EQ(vb2_verify_keyblock(h, hsize, &key, &wb),
VB2_ERROR_KEYBLOCK_SIG_INVALID,
"vb2_verify_keyblock() sig too small");
Memcpy(h, hdr, hsize);
((uint8_t *)vb2_packed_key_data(&h->data_key))[0] ^= 0x34;
TEST_EQ(vb2_verify_keyblock(h, hsize, &key, &wb),
VB2_ERROR_KEYBLOCK_SIG_INVALID,
"vb2_verify_keyblock() sig mismatch");
Memcpy(h, hdr, hsize);
h->keyblock_signature.data_size = h->keyblock_size + 1;
TEST_EQ(vb2_verify_keyblock(h, hsize, &key, &wb),
VB2_ERROR_KEYBLOCK_SIGNED_TOO_MUCH,
"vb2_verify_keyblock() sig data past end of block");
/* Check that we signed header and data key */
Memcpy(h, hdr, hsize);
h->keyblock_signature.data_size = 4;
h->data_key.key_offset = 0;
h->data_key.key_size = 0;
resign_keyblock(h, private_key);
TEST_EQ(vb2_verify_keyblock(h, hsize, &key, &wb),
VB2_ERROR_KEYBLOCK_SIGNED_TOO_LITTLE,
"vb2_verify_keyblock() didn't sign header");
Memcpy(h, hdr, hsize);
h->data_key.key_offset = hsize;
resign_keyblock(h, private_key);
TEST_EQ(vb2_verify_keyblock(h, hsize, &key, &wb),
VB2_ERROR_KEYBLOCK_DATA_KEY_OUTSIDE,
"vb2_verify_keyblock() data key off end");
/* Corner cases for error checking */
TEST_EQ(vb2_verify_keyblock(NULL, 4, &key, &wb),
VB2_ERROR_KEYBLOCK_TOO_SMALL_FOR_HEADER,
"vb2_verify_keyblock size too small");
/*
* TODO: verify parser can support a bigger header (i.e., one where
* data_key.key_offset is bigger than expected).
*/
free(h);
free(hdr);
}
static void test_verify_kernel_preamble(
const struct vb2_packed_key *public_key,
const struct vb2_private_key *private_key)
{
struct vb2_public_key rsa;
// TODO: how many workbuf bytes?
uint8_t workbuf[VB2_VERIFY_FIRMWARE_PREAMBLE_WORKBUF_BYTES]
__attribute__ ((aligned (VB2_WORKBUF_ALIGN)));
struct vb2_workbuf wb;
uint32_t hsize;
vb2_workbuf_init(&wb, workbuf, sizeof(workbuf));
/* Create a dummy signature */
struct vb2_signature *body_sig = vb2_alloc_signature(56, 0x214000);
TEST_SUCC(vb2_unpack_key(&rsa, public_key),
"vb2_verify_kernel_preamble() prereq key");
struct vb2_kernel_preamble *hdr =
vb2_create_kernel_preamble(0x1234, 0x100000, 0x300000, 0x4000,
body_sig, 0x304000, 0x10000, 0, 0,
private_key);
TEST_PTR_NEQ(hdr, NULL,
"vb2_verify_kernel_preamble() prereq test preamble");
if (!hdr) {
free(body_sig);
return;
}
hsize = (uint32_t) hdr->preamble_size;
struct vb2_kernel_preamble *h =
(struct vb2_kernel_preamble *)malloc(hsize + 16384);
memcpy(h, hdr, hsize);
TEST_SUCC(vb2_verify_kernel_preamble(h, hsize, &rsa, &wb),
"vb2_verify_kernel_preamble() ok using key");
memcpy(h, hdr, hsize);
TEST_EQ(vb2_verify_kernel_preamble(h, 4, &rsa, &wb),
VB2_ERROR_PREAMBLE_TOO_SMALL_FOR_HEADER,
"vb2_verify_kernel_preamble() size tiny");
memcpy(h, hdr, hsize);
TEST_EQ(vb2_verify_kernel_preamble(h, hsize - 1, &rsa, &wb),
VB2_ERROR_PREAMBLE_SIZE,
"vb2_verify_kernel_preamble() size--");
/* Buffer is allowed to be bigger than preamble */
memcpy(h, hdr, hsize);
TEST_SUCC(vb2_verify_kernel_preamble(h, hsize + 1, &rsa, &wb),
"vb2_verify_kernel_preamble() size++");
/* Care about major version but not minor */
memcpy(h, hdr, hsize);
h->header_version_major++;
resign_kernel_preamble(h, private_key);
TEST_EQ(vb2_verify_kernel_preamble(h, hsize, &rsa, &wb),
VB2_ERROR_PREAMBLE_HEADER_VERSION
, "vb2_verify_kernel_preamble() major++");
memcpy(h, hdr, hsize);
h->header_version_major--;
resign_kernel_preamble(h, private_key);
TEST_EQ(vb2_verify_kernel_preamble(h, hsize, &rsa, &wb),
VB2_ERROR_PREAMBLE_HEADER_VERSION,
"vb2_verify_kernel_preamble() major--");
memcpy(h, hdr, hsize);
h->header_version_minor++;
resign_kernel_preamble(h, private_key);
TEST_SUCC(vb2_verify_kernel_preamble(h, hsize, &rsa, &wb),
"vb2_verify_kernel_preamble() minor++");
/* Check signature */
memcpy(h, hdr, hsize);
h->preamble_signature.sig_offset = hsize;
resign_kernel_preamble(h, private_key);
TEST_EQ(vb2_verify_kernel_preamble(h, hsize, &rsa, &wb),
VB2_ERROR_PREAMBLE_SIG_OUTSIDE,
"vb2_verify_kernel_preamble() sig off end");
memcpy(h, hdr, hsize);
h->preamble_signature.sig_size--;
resign_kernel_preamble(h, private_key);
TEST_EQ(vb2_verify_kernel_preamble(h, hsize, &rsa, &wb),
VB2_ERROR_PREAMBLE_SIG_INVALID,
"vb2_verify_kernel_preamble() sig too small");
memcpy(h, hdr, hsize);
h->flags++;
TEST_EQ(vb2_verify_kernel_preamble(h, hsize, &rsa, &wb),
VB2_ERROR_PREAMBLE_SIG_INVALID,
"vb2_verify_kernel_preamble() sig mismatch");
/* Check that we signed header and body sig */
memcpy(h, hdr, hsize);
h->preamble_signature.data_size = 4;
h->body_signature.sig_offset = 0;
h->body_signature.sig_size = 0;
resign_kernel_preamble(h, private_key);
TEST_EQ(vb2_verify_kernel_preamble(h, hsize, &rsa, &wb),
VB2_ERROR_PREAMBLE_SIGNED_TOO_LITTLE,
"vb2_verify_kernel_preamble() didn't sign header");
memcpy(h, hdr, hsize);
h->body_signature.sig_offset = hsize;
resign_kernel_preamble(h, private_key);
TEST_EQ(vb2_verify_kernel_preamble(h, hsize, &rsa, &wb),
VB2_ERROR_PREAMBLE_BODY_SIG_OUTSIDE,
"vb2_verify_kernel_preamble() body sig off end");
/* Check bootloader inside signed body */
memcpy(h, hdr, hsize);
h->bootloader_address = h->body_load_address - 1;
resign_kernel_preamble(h, private_key);
TEST_EQ(vb2_verify_kernel_preamble(h, hsize, &rsa, &wb),
VB2_ERROR_PREAMBLE_BOOTLOADER_OUTSIDE,
"vb2_verify_kernel_preamble() bootloader before body");
memcpy(h, hdr, hsize);
h->bootloader_address = h->body_load_address +
h->body_signature.data_size + 1;
resign_kernel_preamble(h, private_key);
TEST_EQ(vb2_verify_kernel_preamble(h, hsize, &rsa, &wb),
VB2_ERROR_PREAMBLE_BOOTLOADER_OUTSIDE,
"vb2_verify_kernel_preamble() bootloader off end of body");
memcpy(h, hdr, hsize);
h->bootloader_address = h->body_load_address +
h->body_signature.data_size + 1;
h->bootloader_size = 0;
resign_kernel_preamble(h, private_key);
TEST_SUCC(vb2_verify_kernel_preamble(h, hsize, &rsa, &wb),
"vb2_verify_kernel_preamble() no bootloader");
/* Check vmlinuz inside signed body */
memcpy(h, hdr, hsize);
h->vmlinuz_header_address = h->body_load_address - 1;
resign_kernel_preamble(h, private_key);
TEST_EQ(vb2_verify_kernel_preamble(h, hsize, &rsa, &wb),
VB2_ERROR_PREAMBLE_VMLINUZ_HEADER_OUTSIDE,
"vb2_verify_kernel_preamble() vmlinuz_header before body");
memcpy(h, hdr, hsize);
h->vmlinuz_header_address = h->body_load_address +
h->body_signature.data_size + 1;
resign_kernel_preamble(h, private_key);
TEST_EQ(vb2_verify_kernel_preamble(h, hsize, &rsa, &wb),
VB2_ERROR_PREAMBLE_VMLINUZ_HEADER_OUTSIDE,
"vb2_verify_kernel_preamble() vmlinuz_header off end of body");
memcpy(h, hdr, hsize);
h->vmlinuz_header_address = h->body_load_address +
h->body_signature.data_size + 1;
h->vmlinuz_header_size = 0;
resign_kernel_preamble(h, private_key);
TEST_SUCC(vb2_verify_kernel_preamble(h, hsize, &rsa, &wb),
"vb2_verify_kernel_preamble() no vmlinuz_header");
/* TODO: verify with extra padding at end of header. */
free(h);
free(hdr);
free(body_sig);
}
