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vb21_common2_tests: Fix test for exponent 3 keys

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vb2_public_key_read_keyb cannot be used for VB2.1 public keys
(especially not for 2048 exponent 3 or F4, as their size is the
same so the algorithm cannot be guess).

Instead, do what futility/rwsig does and derive the public key from
the private RSA key.

BRANCH=none
BUG=b:64854892
TEST=make runlongtests

Change-Id: Ie81f40e6076cd0c234012b9af58e39425f8b717c
Signed-off-by: Nicolas Boichat <drinkcat@google.com>
Reviewed-on: https://chromium-review.googlesource.com/628177
Commit-Ready: Nicolas Boichat <drinkcat@chromium.org>
Tested-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Reviewed-by: Caveh Jalali <caveh@google.com>
This commit is contained in:
Nicolas Boichat
2017-08-23 17:39:25 +08:00
committed by chrome-bot
parent a9cbc26736
commit 4ec9ee3784
1 changed files with 25 additions and 6 deletions
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31
tests/vb21_common2_tests.c
View File

@@ -17,6 +17,7 @@
#include "host_key2.h"
#include "host_signature2.h"
#include "test_common.h"
#include "util_misc.h"
static const uint8_t test_data[] = "This is some test data to sign.";
@@ -246,7 +247,10 @@ int test_algorithm(int key_algorithm, const char *keys_dir)
struct vb2_private_key *prik = NULL;
struct vb21_signature *sig2 = NULL;
struct vb2_public_key *pubk = NULL;
struct vb2_public_key *pubk;
uint8_t *pubk_buf = 0;
uint8_t *keyb_data = 0;
uint32_t keyb_size;
struct vb21_packed_key *key2 = NULL;
printf("***Testing algorithm: %s\n",
@@ -261,11 +265,26 @@ int test_algorithm(int key_algorithm, const char *keys_dir)
prik->sig_alg = sig_alg;
vb2_private_key_set_desc(prik, "private key");
snprintf(filename, sizeof(filename), "%s/key_%s.keyb",
keys_dir,
vb2_get_crypto_algorithm_file(key_algorithm));
TEST_SUCC(vb2_public_key_read_keyb(&pubk, filename),
"Read public key");
/* Create the public key */
TEST_SUCC(vb2_public_key_alloc(&pubk, sig_alg), "Allocate public key");
/* Extract the keyb blob */
TEST_SUCC(vb_keyb_from_rsa(prik->rsa_private_key,
&keyb_data, &keyb_size),
"Extract public key");
/*
* Copy the keyb blob to the public key's buffer, because that's
* where vb2_unpack_key_data() and vb2_public_key_pack() expect
* to find it.
*/
pubk_buf = vb2_public_key_packed_data(pubk);
memcpy(pubk_buf, keyb_data, keyb_size);
/* Fill in the internal struct pointers */
TEST_SUCC(vb2_unpack_key_data(pubk, pubk_buf, keyb_size),
"unpack public key blob");
pubk->hash_alg = hash_alg;
vb2_public_key_set_desc(pubk, "public key");
TEST_SUCC(vb21_public_key_pack(&key2, pubk), "Pack public key");