/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Tests for firmware image library.
*/
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "2sysincludes.h"
#include "2common.h"
#include "2rsa.h"
#include "vb2_common.h"
#include "host_common.h"
#include "host_key2.h"
#include "host_signature2.h"
#include "test_common.h"
static const uint8_t test_data[] = "This is some test data to sign.";
static const uint32_t test_size = sizeof(test_data);
static void test_unpack_key(const struct vb2_packed_key *key)
{
struct vb2_public_key pubk;
struct vb2_packed_key *key2;
uint32_t size = key->c.total_size;
/* Make a copy of the key for testing */
key2 = (struct vb2_packed_key *)malloc(size);
memcpy(key2, key, size);
TEST_SUCC(vb2_unpack_key(&pubk, (uint8_t *)key2, size),
"vb2_unpack_key() ok");
memcpy(key2, key, size);
key2->key_offset += 4;
TEST_EQ(vb2_unpack_key(&pubk, (uint8_t *)key2, size),
VB2_ERROR_COMMON_MEMBER_SIZE,
"vb2_unpack_key() buffer too small");
memcpy(key2, key, size);
key2->c.fixed_size += size;
TEST_EQ(vb2_unpack_key(&pubk, (uint8_t *)key2, size),
VB2_ERROR_COMMON_FIXED_SIZE,
"vb2_unpack_key() buffer too small for desc");
memcpy(key2, key, size);
key2->c.desc_size = 0;
TEST_SUCC(vb2_unpack_key(&pubk, (uint8_t *)key2, size),
"vb2_unpack_key() no desc");
TEST_EQ(strcmp(pubk.desc, ""), 0, " empty desc string");
memcpy(key2, key, size);
key2->c.magic++;
TEST_EQ(vb2_unpack_key(&pubk, (uint8_t *)key2, size),
VB2_ERROR_UNPACK_KEY_MAGIC,
"vb2_unpack_key() bad magic");
memcpy(key2, key, size);
key2->c.struct_version_major++;
TEST_EQ(vb2_unpack_key(&pubk, (uint8_t *)key2, size),
VB2_ERROR_UNPACK_KEY_STRUCT_VERSION,
"vb2_unpack_key() bad major version");
/*
* Minor version changes are ok. Note that this test assumes that the
* source key struct version is the highest actually known to the
* reader. If the reader does know about minor version + 1 and that
* adds fields, this test will likely fail. But at that point, we
* should have already added a test for minor version compatibility to
* handle both old and new struct versions, so someone will have
* noticed this comment.
*/
memcpy(key2, key, size);
key2->c.struct_version_minor++;
TEST_SUCC(vb2_unpack_key(&pubk, (uint8_t *)key2, size),
"vb2_unpack_key() minor version change ok");
memcpy(key2, key, size);
key2->sig_alg = VB2_SIG_INVALID;
TEST_EQ(vb2_unpack_key(&pubk, (uint8_t *)key2, size),
VB2_ERROR_UNPACK_KEY_SIG_ALGORITHM,
"vb2_unpack_key() bad sig algorithm");
memcpy(key2, key, size);
key2->hash_alg = VB2_HASH_INVALID;
TEST_EQ(vb2_unpack_key(&pubk, (uint8_t *)key2, size),
VB2_ERROR_UNPACK_KEY_HASH_ALGORITHM,
"vb2_unpack_key() bad hash algorithm");
memcpy(key2, key, size);
key2->key_size -= 4;
TEST_EQ(vb2_unpack_key(&pubk, (uint8_t *)key2, size),
VB2_ERROR_UNPACK_KEY_SIZE,
"vb2_unpack_key() invalid size");
memcpy(key2, key, size);
key2->key_offset--;
TEST_EQ(vb2_unpack_key(&pubk, (uint8_t *)key2, size),
VB2_ERROR_COMMON_MEMBER_UNALIGNED,
"vb2_unpack_key() unaligned data");
memcpy(key2, key, size);
*(uint32_t *)((uint8_t *)key2 + key2->key_offset) /= 2;
TEST_EQ(vb2_unpack_key(&pubk, (uint8_t *)key2, size),
VB2_ERROR_UNPACK_KEY_ARRAY_SIZE,
"vb2_unpack_key() invalid key array size");
free(key2);
}
static void test_verify_signature(const struct vb2_signature *sig)
{
struct vb2_signature *sig2;
uint8_t *buf2;
uint32_t size;
/* Make a copy of the signature */
size = sig->c.total_size;
buf2 = malloc(size);
sig2 = (struct vb2_signature *)buf2;
memcpy(buf2, sig, size);
TEST_SUCC(vb2_verify_signature(sig2, size), "verify_sig ok");
sig2->c.magic = VB2_MAGIC_PACKED_KEY;
TEST_EQ(vb2_verify_signature(sig2, size), VB2_ERROR_SIG_MAGIC,
"verify_sig magic");
memcpy(buf2, sig, size);
sig2->c.total_size += 4;
TEST_EQ(vb2_verify_signature(sig2, size), VB2_ERROR_COMMON_TOTAL_SIZE,
"verify_sig common header");
memcpy(buf2, sig, size);
sig2->c.struct_version_minor++;
TEST_SUCC(vb2_verify_signature(sig2, size), "verify_sig minor ver");
sig2->c.struct_version_major++;
TEST_EQ(vb2_verify_signature(sig2, size), VB2_ERROR_SIG_VERSION,
"verify_sig major ver");
memcpy(buf2, sig, size);
sig2->c.fixed_size -= 4;
sig2->c.desc_size += 4;
TEST_EQ(vb2_verify_signature(sig2, size), VB2_ERROR_SIG_HEADER_SIZE,
"verify_sig header size");
memcpy(buf2, sig, size);
sig2->sig_size += 4;
TEST_EQ(vb2_verify_signature(sig2, size), VB2_ERROR_COMMON_MEMBER_SIZE,
"verify_sig sig size");
memcpy(buf2, sig, size);
sig2->sig_alg = VB2_SIG_INVALID;
TEST_EQ(vb2_verify_signature(sig2, size), VB2_ERROR_SIG_ALGORITHM,
"verify_sig sig alg");
memcpy(buf2, sig, size);
sig2->sig_alg = (sig2->sig_alg == VB2_SIG_NONE ?
VB2_SIG_RSA1024 : VB2_SIG_NONE);
TEST_EQ(vb2_verify_signature(sig2, size), VB2_ERROR_SIG_SIZE,
"verify_sig sig size");
free(buf2);
}
static void test_verify_data(const struct vb2_public_key *pubk_orig,
const struct vb2_signature *sig)
{
uint8_t workbuf[VB2_VERIFY_DATA_WORKBUF_BYTES]
__attribute__ ((aligned (VB2_WORKBUF_ALIGN)));
struct vb2_workbuf wb;
struct vb2_public_key pubk;
struct vb2_signature *sig2;
uint8_t *buf2;
uint32_t size;
vb2_workbuf_init(&wb, workbuf, sizeof(workbuf));
pubk = *pubk_orig;
/* Allocate signature copy for tests */
size = sig->c.total_size;
buf2 = malloc(size);
sig2 = (struct vb2_signature *)buf2;
memcpy(buf2, sig, size);
pubk.sig_alg = VB2_SIG_INVALID;
TEST_EQ(vb2_verify_data(test_data, test_size, sig2, &pubk, &wb),
VB2_ERROR_VDATA_ALGORITHM, "vb2_verify_data() bad sig alg");
pubk = *pubk_orig;
memcpy(buf2, sig, size);
pubk.hash_alg = VB2_HASH_INVALID;
TEST_EQ(vb2_verify_data(test_data, test_size, sig2, &pubk, &wb),
VB2_ERROR_VDATA_DIGEST_SIZE,
"vb2_verify_data() bad hash alg");
pubk = *pubk_orig;
vb2_workbuf_init(&wb, workbuf, 4);
memcpy(buf2, sig, size);
TEST_EQ(vb2_verify_data(test_data, test_size, sig2, &pubk, &wb),
VB2_ERROR_VDATA_WORKBUF_DIGEST,
"vb2_verify_data() workbuf too small");
vb2_workbuf_init(&wb, workbuf, sizeof(workbuf));
memcpy(buf2, sig, size);
TEST_EQ(vb2_verify_data(test_data, test_size, sig2, &pubk, &wb),
0, "vb2_verify_data() ok");
memcpy(buf2, sig, size);
sig2->sig_size -= 16;
TEST_EQ(vb2_verify_data(test_data, test_size, sig2, &pubk, &wb),
VB2_ERROR_VDATA_SIG_SIZE, "vb2_verify_data() wrong sig size");
memcpy(buf2, sig, size);
TEST_EQ(vb2_verify_data(test_data, test_size - 1, sig2, &pubk, &wb),
VB2_ERROR_VDATA_SIZE, "vb2_verify_data() wrong data size");
memcpy(buf2, sig, size);
sig2->hash_alg = (sig2->hash_alg == VB2_HASH_SHA1 ?
VB2_HASH_SHA256 : VB2_HASH_SHA1);
TEST_EQ(vb2_verify_data(test_data, test_size, sig2, &pubk, &wb),
VB2_ERROR_VDATA_ALGORITHM_MISMATCH,
"vb2_verify_data() alg mismatch");
memcpy(buf2, sig, size);
buf2[sig2->sig_offset] ^= 0x5A;
TEST_EQ(vb2_verify_data(test_data, test_size, sig2, &pubk, &wb),
VB2_ERROR_RSA_PADDING, "vb2_verify_data() wrong sig");
free(buf2);
}
int test_algorithm(int key_algorithm, const char *keys_dir)
{
char filename[1024];
int rsa_len = siglen_map[key_algorithm] * 8;
enum vb2_signature_algorithm sig_alg =
vb2_crypto_to_signature(key_algorithm);
enum vb2_hash_algorithm hash_alg = vb2_crypto_to_hash(key_algorithm);
struct vb2_private_key *prik = NULL;
struct vb2_signature *sig2 = NULL;
struct vb2_public_key *pubk = NULL;
struct vb2_packed_key *key2 = NULL;
printf("***Testing algorithm: %s\n", algo_strings[key_algorithm]);
sprintf(filename, "%s/key_rsa%d.pem", keys_dir, rsa_len);
TEST_SUCC(vb2_private_key_read_pem(&prik, filename),
"Read private key");
prik->hash_alg = hash_alg;
prik->sig_alg = sig_alg;
vb2_private_key_set_desc(prik, "private key");
sprintf(filename, "%s/key_rsa%d.keyb", keys_dir, rsa_len);
TEST_SUCC(vb2_public_key_read_keyb(&pubk, filename),
"Read public key");
pubk->hash_alg = hash_alg;
vb2_public_key_set_desc(pubk, "public key");
TEST_SUCC(vb2_public_key_pack(&key2, pubk), "Pack public key");
/* Calculate good signatures */
TEST_SUCC(vb2_sign_data(&sig2, test_data, test_size, prik, ""),
"Make test signature");
test_unpack_key(key2);
test_verify_data(pubk, sig2);
test_verify_signature(sig2);
free(key2);
free(sig2);
vb2_private_key_free(prik);
vb2_public_key_free(pubk);
return 0;
}
/* Test only the algorithms we use */
const int key_algs[] = {
VB2_ALG_RSA2048_SHA256,
VB2_ALG_RSA4096_SHA256,
VB2_ALG_RSA8192_SHA512,
};
int main(int argc, char *argv[]) {
if (argc == 2) {
int i;
for (i = 0; i < ARRAY_SIZE(key_algs); i++) {
if (test_algorithm(key_algs[i], argv[1]))
return 1;
}
} else if (argc == 3 && !strcasecmp(argv[2], "--all")) {
/* Test all the algorithms */
int alg;
for (alg = 0; alg < kNumAlgorithms; alg++) {
if (test_algorithm(alg, argv[1]))
return 1;
}
} else {
fprintf(stderr, "Usage: %s <keys_dir> [--all]", argv[0]);
return -1;
}
return gTestSuccess ? 0 : 255;
}