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/* 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 "file_keys.h"
#include "host_common.h"
#include "vboot_common.h"
#include "test_common.h"
#include "2common.h"
#include "2rsa.h"
static void test_unpack_key(const VbPublicKey *orig_key)
{
struct vb2_public_key rsa;
VbPublicKey *key = PublicKeyAlloc(orig_key->key_size, 0, 0);
/* vb2_packed_key and VbPublicKey are bit-identical */
struct vb2_packed_key *key2 = (struct vb2_packed_key *)key;
uint8_t *buf = (uint8_t *)key;
/*
* Key data follows the header for a newly allocated key, so we can
* calculate the buffer size by looking at how far the key data goes.
*/
uint32_t size = key2->key_offset + key2->key_size;
PublicKeyCopy(key, orig_key);
TEST_SUCC(vb2_unpack_key(&rsa, buf, size), "vb2_unpack_key() ok");
TEST_EQ(rsa.sig_alg, vb2_crypto_to_signature(key2->algorithm),
"vb2_unpack_key() sig_alg");
TEST_EQ(rsa.hash_alg, vb2_crypto_to_hash(key2->algorithm),
"vb2_unpack_key() hash_alg");
PublicKeyCopy(key, orig_key);
key2->algorithm = VB2_ALG_COUNT;
TEST_EQ(vb2_unpack_key(&rsa, buf, size),
VB2_ERROR_UNPACK_KEY_SIG_ALGORITHM,
"vb2_unpack_key() invalid algorithm");
PublicKeyCopy(key, orig_key);
key2->key_size--;
TEST_EQ(vb2_unpack_key(&rsa, buf, size),
VB2_ERROR_UNPACK_KEY_SIZE,
"vb2_unpack_key() invalid size");
key2->key_size++;
PublicKeyCopy(key, orig_key);
key2->key_offset++;
TEST_EQ(vb2_unpack_key(&rsa, buf, size + 1),
VB2_ERROR_UNPACK_KEY_ALIGN,
"vb2_unpack_key() unaligned data");
key2->key_offset--;
PublicKeyCopy(key, orig_key);
*(uint32_t *)(buf + key2->key_offset) /= 2;
TEST_EQ(vb2_unpack_key(&rsa, buf, size),
VB2_ERROR_UNPACK_KEY_ARRAY_SIZE,
"vb2_unpack_key() invalid key array size");
PublicKeyCopy(key, orig_key);
TEST_EQ(vb2_unpack_key(&rsa, buf, size - 1),
VB2_ERROR_INSIDE_DATA_OUTSIDE,
"vb2_unpack_key() buffer too small");
free(key);
}
static void test_verify_data(const VbPublicKey *public_key,
const VbPrivateKey *private_key)
{
const uint8_t test_data[] = "This is some test data to sign.";
const uint64_t test_size = sizeof(test_data);
uint8_t workbuf[VB2_VERIFY_DATA_WORKBUF_BYTES];
struct vb2_workbuf wb;
VbSignature *sig;
struct vb2_public_key rsa, rsa_orig;
struct vb2_signature *sig2;
struct vb2_packed_key *public_key2;
vb2_workbuf_init(&wb, workbuf, sizeof(workbuf));
/* Vb2 structs are bit-identical to the old ones */
public_key2 = (struct vb2_packed_key *)public_key;
uint32_t pubkey_size = public_key2->key_offset + public_key2->key_size;
/* Calculate good signature */
sig = CalculateSignature(test_data, test_size, private_key);
TEST_PTR_NEQ(sig, 0, "VerifyData() calculate signature");
if (!sig)
return;
/* Allocate signature copy for tests */
sig2 = (struct vb2_signature *)
SignatureAlloc(siglen_map[public_key2->algorithm], 0);
TEST_EQ(vb2_unpack_key(&rsa, (uint8_t *)public_key2, pubkey_size),
0, "vb2_verify_data() unpack key");
rsa_orig = rsa;
memcpy(sig2, sig, sizeof(VbSignature) + sig->sig_size);
rsa.sig_alg = VB2_SIG_INVALID;
TEST_NEQ(vb2_verify_data(test_data, test_size, sig2, &rsa, &wb),
0, "vb2_verify_data() bad sig alg");
rsa.sig_alg = rsa_orig.sig_alg;
memcpy(sig2, sig, sizeof(VbSignature) + sig->sig_size);
rsa.hash_alg = VB2_HASH_INVALID;
TEST_NEQ(vb2_verify_data(test_data, test_size, sig2, &rsa, &wb),
0, "vb2_verify_data() bad hash alg");
rsa.hash_alg = rsa_orig.hash_alg;
vb2_workbuf_init(&wb, workbuf, 4);
memcpy(sig2, sig, sizeof(VbSignature) + sig->sig_size);
TEST_NEQ(vb2_verify_data(test_data, test_size, sig2, &rsa, &wb),
0, "vb2_verify_data() workbuf too small");
vb2_workbuf_init(&wb, workbuf, sizeof(workbuf));
memcpy(sig2, sig, sizeof(VbSignature) + sig->sig_size);
TEST_EQ(vb2_verify_data(test_data, test_size, sig2, &rsa, &wb),
0, "vb2_verify_data() ok");
memcpy(sig2, sig, sizeof(VbSignature) + sig->sig_size);
sig2->sig_size -= 16;
TEST_NEQ(vb2_verify_data(test_data, test_size, sig2, &rsa, &wb),
0, "vb2_verify_data() wrong sig size");
memcpy(sig2, sig, sizeof(VbSignature) + sig->sig_size);
TEST_NEQ(vb2_verify_data(test_data, test_size - 1, sig2, &rsa, &wb),
0, "vb2_verify_data() input buffer too small");
memcpy(sig2, sig, sizeof(VbSignature) + sig->sig_size);
vb2_signature_data(sig2)[0] ^= 0x5A;
TEST_NEQ(vb2_verify_data(test_data, test_size, sig2, &rsa, &wb),
0, "vb2_verify_data() wrong sig");
free(sig);
free(sig2);
}
int test_algorithm(int key_algorithm, const char *keys_dir)
{
char filename[1024];
int rsa_len = siglen_map[key_algorithm] * 8;
VbPrivateKey *private_key = NULL;
VbPublicKey *public_key = NULL;
printf("***Testing algorithm: %s\n", algo_strings[key_algorithm]);
sprintf(filename, "%s/key_rsa%d.pem", keys_dir, rsa_len);
private_key = PrivateKeyReadPem(filename, key_algorithm);
if (!private_key) {
fprintf(stderr, "Error reading private_key: %s\n", filename);
return 1;
}
sprintf(filename, "%s/key_rsa%d.keyb", keys_dir, rsa_len);
public_key = PublicKeyReadKeyb(filename, key_algorithm, 1);
if (!public_key) {
fprintf(stderr, "Error reading public_key: %s\n", filename);
return 1;
}
test_unpack_key(public_key);
test_verify_data(public_key, private_key);
if (public_key)
free(public_key);
if (private_key)
free(private_key);
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;
}
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