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Rewrite test_tortls_cert_matches_key()

Browse Source 
Unlike the old test, this test no will no longer mess around with
the forbidden internals of any openssl data structures.

Additionally, it verifies several other behaviors of
tor_tls_cert_matches_key() that we had wanted to verify, such as
the possibility of the certificate's key not matching.

Fixes bug 27226; bugfix on 0.2.5.1-alpha.
This commit is contained in:
Nick Mathewson 2018-08-20 17:43:41 -04:00
parent c1f476a3d5
commit 85a8792344
2 changed files with 60 additions and 54 deletions
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5
changes/bug27226 Normal file
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@ -0,0 +1,5 @@
o Minor bugfixes (testing, openssl compatibility):
- Our "tortls/cert_matches_key" unit test no longer relies on OpenSSL
internals. Previously, it relied on unsupported OpenSSL behavior in
a way that caused it to crash with OpenSSL 1.0.2p. Fixes bug 27226;
bugfix on 0.2.5.1-alpha.

109
src/test/test_tortls.c
View File

@ -546,13 +546,6 @@ test_tortls_x509_cert_get_id_digests(void *ignored)
}
#ifndef OPENSSL_OPAQUE
static int
fixed_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
{
(void) a; (void) b;
return 1;
}
static void
fake_x509_free(X509 *cert)
{
@ -569,70 +562,78 @@ fake_x509_free(X509 *cert)
tor_free(cert);
}
}
#endif
static tor_x509_cert_t *fixed_x509_cert = NULL;
static tor_x509_cert_t *
get_peer_cert_mock_return_fixed(tor_tls_t *tls)
{
(void)tls;
if (fixed_x509_cert)
return tor_x509_cert_dup(fixed_x509_cert);
else
return NULL;
}
static void
test_tortls_cert_matches_key(void *ignored)
{
(void)ignored;
int res;
tor_tls_t *tls;
tor_x509_cert_t *cert;
X509 *one = NULL, *two = NULL;
EVP_PKEY_ASN1_METHOD *meth = EVP_PKEY_asn1_new(999, 0, NULL, NULL);
EVP_PKEY_asn1_set_public(meth, NULL, NULL, fixed_pub_cmp, NULL, NULL, NULL);
tls = tor_malloc_zero(sizeof(tor_tls_t));
cert = tor_malloc_zero(sizeof(tor_x509_cert_t));
one = tor_malloc_zero(sizeof(X509));
one->references = 1;
two = tor_malloc_zero(sizeof(X509));
two->references = 1;
X509 *cert1 = NULL, *cert2 = NULL, *cert3 = NULL, *cert4 = NULL;
tor_x509_cert_t *c1 = NULL, *c2 = NULL, *c3 = NULL, *c4 = NULL;
crypto_pk_t *k1 = NULL, *k2 = NULL, *k3 = NULL;
res = tor_tls_cert_matches_key(tls, cert);
tt_int_op(res, OP_EQ, 0);
k1 = pk_generate(1);
k2 = pk_generate(2);
k3 = pk_generate(3);
tls->ssl = tor_malloc_zero(sizeof(SSL));
tls->ssl->session = tor_malloc_zero(sizeof(SSL_SESSION));
tls->ssl->session->peer = one;
res = tor_tls_cert_matches_key(tls, cert);
tt_int_op(res, OP_EQ, 0);
cert1 = tor_tls_create_certificate(k1, k2, "A", "B", 1000);
cert2 = tor_tls_create_certificate(k1, k3, "C", "D", 1000);
cert3 = tor_tls_create_certificate(k2, k3, "C", "D", 1000);
cert4 = tor_tls_create_certificate(k3, k2, "E", "F", 1000);
cert->cert = two;
res = tor_tls_cert_matches_key(tls, cert);
tt_int_op(res, OP_EQ, 0);
tt_assert(cert1 && cert2 && cert3 && cert4);
one->cert_info = tor_malloc_zero(sizeof(X509_CINF));
one->cert_info->key = tor_malloc_zero(sizeof(X509_PUBKEY));
one->cert_info->key->pkey = tor_malloc_zero(sizeof(EVP_PKEY));
one->cert_info->key->pkey->references = 1;
one->cert_info->key->pkey->ameth = meth;
one->cert_info->key->pkey->type = 1;
c1 = tor_x509_cert_new(cert1); cert1 = NULL;
c2 = tor_x509_cert_new(cert2); cert2 = NULL;
c3 = tor_x509_cert_new(cert3); cert3 = NULL;
c4 = tor_x509_cert_new(cert4); cert4 = NULL;
two->cert_info = tor_malloc_zero(sizeof(X509_CINF));
two->cert_info->key = tor_malloc_zero(sizeof(X509_PUBKEY));
two->cert_info->key->pkey = tor_malloc_zero(sizeof(EVP_PKEY));
two->cert_info->key->pkey->references = 1;
two->cert_info->key->pkey->ameth = meth;
two->cert_info->key->pkey->type = 2;
tt_assert(c1 && c2 && c3 && c4);
res = tor_tls_cert_matches_key(tls, cert);
tt_int_op(res, OP_EQ, 0);
MOCK(tor_tls_get_peer_cert, get_peer_cert_mock_return_fixed);
one->cert_info->key->pkey->type = 1;
two->cert_info->key->pkey->type = 1;
res = tor_tls_cert_matches_key(tls, cert);
tt_int_op(res, OP_EQ, 1);
fixed_x509_cert = NULL;
/* If the peer has no certificate, it shouldn't match anything. */
tt_assert(! tor_tls_cert_matches_key(NULL, c1));
tt_assert(! tor_tls_cert_matches_key(NULL, c2));
tt_assert(! tor_tls_cert_matches_key(NULL, c3));
tt_assert(! tor_tls_cert_matches_key(NULL, c4));
fixed_x509_cert = c1;
/* If the peer has a certificate, it should match every cert with the same
* subject key. */
tt_assert(tor_tls_cert_matches_key(NULL, c1));
tt_assert(tor_tls_cert_matches_key(NULL, c2));
tt_assert(! tor_tls_cert_matches_key(NULL, c3));
tt_assert(! tor_tls_cert_matches_key(NULL, c4));
done:
EVP_PKEY_asn1_free(meth);
tor_free(tls->ssl->session);
tor_free(tls->ssl);
tor_free(tls);
tor_free(cert);
fake_x509_free(one);
fake_x509_free(two);
tor_x509_cert_free(c1);
tor_x509_cert_free(c2);
tor_x509_cert_free(c3);
tor_x509_cert_free(c4);
if (cert1) X509_free(cert1);
if (cert2) X509_free(cert2);
if (cert3) X509_free(cert3);
if (cert4) X509_free(cert4);
crypto_pk_free(k1);
crypto_pk_free(k2);
crypto_pk_free(k3);
UNMOCK(tor_tls_get_peer_cert);
}
#ifndef OPENSSL_OPAQUE
static void
test_tortls_cert_get_key(void *ignored)
{