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bail out when a bad alt name is found in the list of alt names

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This commit is contained in:
Jacob Barthelmeh
2021-10-19 15:18:42 -06:00
parent e5caf5124c
commit afee92e0cf
5 changed files with 164 additions and 5 deletions
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1
certs/test/cert-ext-nc.cfg
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@ -10,7 +10,6 @@ L = Brisbane
O = wolfSSL Inc
OU = Engineering
CN = www.wolfssl.com
emailAddress = support@wolfsssl.com
[ v3_ca ]
subjectKeyIdentifier = hash

BIN
certs/test/cert-ext-nc.der
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1
certs/test/gen-ext-certs.sh
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@ -34,7 +34,6 @@ L = Brisbane
O = wolfSSL Inc
OU = Engineering
CN = www.wolfssl.com
emailAddress = support@wolfsssl.com
[ v3_ca ]
subjectKeyIdentifier = hash

155
tests/api.c
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@ -1462,9 +1462,13 @@ static void test_wolfSSL_CertManagerNameConstraint(void)
#if !defined(NO_FILESYSTEM) && !defined(NO_CERTS) && \
!defined(NO_WOLFSSL_CM_VERIFY) && !defined(NO_RSA) && \
defined(OPENSSL_EXTRA) && defined(WOLFSSL_CERT_GEN) && \
defined(WOLFSSL_CERT_EXT) && defined(WOLFSSL_ALT_NAMES)
defined(WOLFSSL_CERT_EXT) && defined(WOLFSSL_ALT_NAMES) && \
!defined(NO_SHA256)
WOLFSSL_CERT_MANAGER* cm;
WOLFSSL_EVP_PKEY *priv;
WOLFSSL_X509_NAME* name;
const char* ca_cert = "./certs/test/cert-ext-nc.der";
const char* server_cert = "./certs/test/server-goodcn.pem";
int i = 0;
static const byte extNameConsOid[] = {85, 29, 30};
@ -1474,7 +1478,7 @@ static void test_wolfSSL_CertManagerNameConstraint(void)
int derSz;
word32 idx = 0;
byte *pt;
WOLFSSL_X509 *x509;
WOLFSSL_X509 *x509, *ca;
wc_InitRng(&rng);
@ -1524,6 +1528,112 @@ static void test_wolfSSL_CertManagerNameConstraint(void)
wolfSSL_X509_free(x509);
wc_FreeRsaKey(&key);
wc_FreeRng(&rng);
/* add email alt name to satisfy constraint */
pt = (byte*)server_key_der_2048;
AssertNotNull(priv = wolfSSL_d2i_PrivateKey(EVP_PKEY_RSA, NULL,
(const unsigned char**)&pt, sizeof_server_key_der_2048));
AssertNotNull(cm = wolfSSL_CertManagerNew());
AssertNotNull(ca = wolfSSL_X509_load_certificate_file(ca_cert,
WOLFSSL_FILETYPE_ASN1));
AssertNotNull((der = (byte*)wolfSSL_X509_get_der(ca, &derSz)));
#if 0
{
//write out x509 for test
BIO* out = BIO_new(wolfSSL_BIO_s_file());
if (out != NULL) {
FILE* f= fopen("ca.der", "wb");
BIO_set_fp(out, f, BIO_CLOSE);
BIO_write(out, der, derSz);
BIO_free(out);
}
}
#endif
AssertIntEQ(wolfSSL_CertManagerLoadCABuffer(cm, der, derSz,
WOLFSSL_FILETYPE_ASN1), WOLFSSL_SUCCESS);
/* Good cert test with proper alt email name */
AssertNotNull(x509 = wolfSSL_X509_load_certificate_file(server_cert,
WOLFSSL_FILETYPE_PEM));
AssertNotNull(name = wolfSSL_X509_get_subject_name(ca));
AssertIntEQ(wolfSSL_X509_set_issuer_name(x509, name), WOLFSSL_SUCCESS);
AssertNotNull(name = X509_NAME_new());
AssertIntEQ(X509_NAME_add_entry_by_txt(name, "countryName", MBSTRING_UTF8,
(byte*)"US", 2, -1, 0), SSL_SUCCESS);
AssertIntEQ(X509_NAME_add_entry_by_txt(name, "commonName", MBSTRING_UTF8,
(byte*)"wolfssl.com", 11, -1, 0), SSL_SUCCESS);
AssertIntEQ(X509_NAME_add_entry_by_txt(name, "emailAddress", MBSTRING_UTF8,
(byte*)"support@info.wolfssl.com", 24, -1, 0), SSL_SUCCESS);
AssertIntEQ(wolfSSL_X509_set_subject_name(x509, name), WOLFSSL_SUCCESS);
X509_NAME_free(name);
wolfSSL_X509_add_altname(x509, "wolfssl@info.wolfssl.com", ASN_RFC822_TYPE);
(void)altEmail;
AssertIntGT(wolfSSL_X509_sign(x509, priv, EVP_sha256()), 0);
#if 0
{
//write out good x509 for test
BIO* out = BIO_new(wolfSSL_BIO_s_file());
if (out != NULL) {
FILE* f= fopen("good-cert.pem", "wb");
BIO_set_fp(out, f, BIO_CLOSE);
PEM_write_bio_X509(out, x509);
BIO_free(out);
}
}
#endif
AssertNotNull((der = (byte*)wolfSSL_X509_get_der(x509, &derSz)));
AssertIntEQ(wolfSSL_CertManagerVerifyBuffer(cm, der, derSz,
WOLFSSL_FILETYPE_ASN1), WOLFSSL_SUCCESS);
wolfSSL_X509_free(x509);
/* Cert with bad alt name list */
AssertNotNull(x509 = wolfSSL_X509_load_certificate_file(server_cert,
WOLFSSL_FILETYPE_PEM));
AssertNotNull(name = wolfSSL_X509_get_subject_name(ca));
AssertIntEQ(wolfSSL_X509_set_issuer_name(x509, name), WOLFSSL_SUCCESS);
AssertNotNull(name = X509_NAME_new());
AssertIntEQ(X509_NAME_add_entry_by_txt(name, "countryName", MBSTRING_UTF8,
(byte*)"US", 2, -1, 0), SSL_SUCCESS);
AssertIntEQ(X509_NAME_add_entry_by_txt(name, "commonName", MBSTRING_UTF8,
(byte*)"wolfssl.com", 11, -1, 0), SSL_SUCCESS);
AssertIntEQ(X509_NAME_add_entry_by_txt(name, "emailAddress", MBSTRING_UTF8,
(byte*)"support@info.wolfssl.com", 24, -1, 0), SSL_SUCCESS);
AssertIntEQ(wolfSSL_X509_set_subject_name(x509, name), WOLFSSL_SUCCESS);
X509_NAME_free(name);
wolfSSL_X509_add_altname(x509, "wolfssl@info.com", ASN_RFC822_TYPE);
wolfSSL_X509_add_altname(x509, "wolfssl@info.wolfssl.com", ASN_RFC822_TYPE);
AssertIntGT(wolfSSL_X509_sign(x509, priv, EVP_sha256()), 0);
#if 0
{
//write out bad x509 for test
BIO* out = BIO_new(wolfSSL_BIO_s_file());
if (out != NULL) {
FILE* f= fopen("bad-cert.pem", "wb");
BIO_set_fp(out, f, BIO_CLOSE);
PEM_write_bio_X509(out, x509);
BIO_free(out);
}
}
#endif
AssertNotNull((der = (byte*)wolfSSL_X509_get_der(x509, &derSz)));
AssertIntEQ(wolfSSL_CertManagerVerifyBuffer(cm, der, derSz,
WOLFSSL_FILETYPE_ASN1), ASN_NAME_INVALID_E);
wolfSSL_CertManagerFree(cm);
wolfSSL_X509_free(x509);
wolfSSL_X509_free(ca);
wolfSSL_EVP_PKEY_free(priv);
#endif
}
@ -1615,6 +1725,46 @@ static void test_wolfSSL_CertManagerNameConstraint2(void)
wolfSSL_X509_add_altname_ex(x509, altNameFail, sizeof(altNameFail),
ASN_DIR_TYPE);
#if defined(WOLFSSL_SHA3) && !defined(WOLFSSL_NOSHA3_256)
wolfSSL_X509_sign(x509, priv, EVP_sha3_256());
#else
wolfSSL_X509_sign(x509, priv, EVP_sha256());
#endif
AssertNotNull((der = wolfSSL_X509_get_der(x509, &derSz)));
AssertIntEQ(wolfSSL_CertManagerVerifyBuffer(cm, der, derSz,
WOLFSSL_FILETYPE_ASN1), ASN_NAME_INVALID_E);
/* check that it still fails if one bad altname and one good altname is in
* the certificate */
wolfSSL_X509_free(x509);
AssertNotNull(x509 = wolfSSL_X509_load_certificate_file(server_cert,
WOLFSSL_FILETYPE_PEM));
AssertNotNull(name = wolfSSL_X509_get_subject_name(ca));
AssertIntEQ(wolfSSL_X509_set_issuer_name(x509, name), WOLFSSL_SUCCESS);
wolfSSL_X509_add_altname_ex(x509, altName, sizeof(altName), ASN_DIR_TYPE);
wolfSSL_X509_add_altname_ex(x509, altNameFail, sizeof(altNameFail),
ASN_DIR_TYPE);
#if defined(WOLFSSL_SHA3) && !defined(WOLFSSL_NOSHA3_256)
wolfSSL_X509_sign(x509, priv, EVP_sha3_256());
#else
wolfSSL_X509_sign(x509, priv, EVP_sha256());
#endif
AssertNotNull((der = wolfSSL_X509_get_der(x509, &derSz)));
AssertIntEQ(wolfSSL_CertManagerVerifyBuffer(cm, der, derSz,
WOLFSSL_FILETYPE_ASN1), ASN_NAME_INVALID_E);
/* check it fails with switching position of bad altname */
wolfSSL_X509_free(x509);
AssertNotNull(x509 = wolfSSL_X509_load_certificate_file(server_cert,
WOLFSSL_FILETYPE_PEM));
AssertNotNull(name = wolfSSL_X509_get_subject_name(ca));
AssertIntEQ(wolfSSL_X509_set_issuer_name(x509, name), WOLFSSL_SUCCESS);
wolfSSL_X509_add_altname_ex(x509, altNameFail, sizeof(altNameFail),
ASN_DIR_TYPE);
wolfSSL_X509_add_altname_ex(x509, altName, sizeof(altName), ASN_DIR_TYPE);
#if defined(WOLFSSL_SHA3) && !defined(WOLFSSL_NOSHA3_256)
wolfSSL_X509_sign(x509, priv, EVP_sha3_256());
#else
@ -1654,7 +1804,6 @@ static void test_wolfSSL_CertManagerNameConstraint2(void)
wolfSSL_CertManagerFree(cm);
wolfSSL_X509_free(x509);
wolfSSL_X509_free(ca);
wolfSSL_EVP_PKEY_free(priv);
#endif
}

12
wolfcrypt/src/asn.c
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@ -13505,6 +13505,12 @@ static int ConfirmNameConstraints(Signer* signer, DecodedCert* cert)
matchDns = MatchBaseName(ASN_DNS_TYPE,
name->name, name->len,
base->name, base->nameSz);
#ifndef WOLFSSL_NO_ASN_STRICT
/* found a bad name */
if (matchDns == 0)
break;
#endif
name = name->next;
}
break;
@ -13520,6 +13526,12 @@ static int ConfirmNameConstraints(Signer* signer, DecodedCert* cert)
matchEmail = MatchBaseName(ASN_DNS_TYPE,
name->name, name->len,
base->name, base->nameSz);
#ifndef WOLFSSL_NO_ASN_STRICT
/* found a bad name */
if (matchEmail == 0)
break;
#endif
name = name->next;
}
break;