static int verify_server_cert(SSL *ssl, const char *host)
{
X509 *cert;
X509_NAME *peer_name;
ASN1_STRING *str;
unsigned char *peer_cn = NULL;
int matched = -1, type = GEN_DNS;
GENERAL_NAMES *alts;
struct in6_addr addr6;
struct in_addr addr4;
void *addr;
int i = -1,j;
if (SSL_get_verify_result(ssl) != X509_V_OK) {
giterr_set(GITERR_SSL, "The SSL certificate is invalid");
return GIT_ECERTIFICATE;
}
/* Try to parse the host as an IP address to see if it is */
if (p_inet_pton(AF_INET, host, &addr4)) {
type = GEN_IPADD;
addr = &addr4;
} else {
if(p_inet_pton(AF_INET6, host, &addr6)) {
type = GEN_IPADD;
addr = &addr6;
}
}
cert = SSL_get_peer_certificate(ssl);
if (!cert) {
giterr_set(GITERR_SSL, "the server did not provide a certificate");
return -1;
}
/* Check the alternative names */
alts = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);
if (alts) {
int num;
num = sk_GENERAL_NAME_num(alts);
for (i = 0; i < num && matched != 1; i++) {
const GENERAL_NAME *gn = sk_GENERAL_NAME_value(alts, i);
const char *name = (char *) ASN1_STRING_data(gn->d.ia5);
size_t namelen = (size_t) ASN1_STRING_length(gn->d.ia5);
/* Skip any names of a type we're not looking for */
if (gn->type != type)
continue;
if (type == GEN_DNS) {
/* If it contains embedded NULs, don't even try */
if (memchr(name, '\0', namelen))
continue;
if (check_host_name(name, host) < 0)
matched = 0;
else
matched = 1;
} else if (type == GEN_IPADD) {
/* Here name isn't so much a name but a binary representation of the IP */
matched = !!memcmp(name, addr, namelen);
}
}
}
GENERAL_NAMES_free(alts);
if (matched == 0)
goto cert_fail_name;
if (matched == 1)
return 0;
/* If no alternative names are available, check the common name */
peer_name = X509_get_subject_name(cert);
if (peer_name == NULL)
goto on_error;
if (peer_name) {
/* Get the index of the last CN entry */
while ((j = X509_NAME_get_index_by_NID(peer_name, NID_commonName, i)) >= 0)
i = j;
}
if (i < 0)
goto on_error;
str = X509_NAME_ENTRY_get_data(X509_NAME_get_entry(peer_name, i));
if (str == NULL)
goto on_error;
/* Work around a bug in OpenSSL whereby ASN1_STRING_to_UTF8 fails if it's already in utf-8 */
if (ASN1_STRING_type(str) == V_ASN1_UTF8STRING) {
int size = ASN1_STRING_length(str);
if (size > 0) {
peer_cn = OPENSSL_malloc(size + 1);
GITERR_CHECK_ALLOC(peer_cn);
memcpy(peer_cn, ASN1_STRING_data(str), size);
peer_cn[size] = '\0';
} else {
goto cert_fail_name;
}
} else {
int size = ASN1_STRING_to_UTF8(&peer_cn, str);
GITERR_CHECK_ALLOC(peer_cn);
if (memchr(peer_cn, '\0', size))
goto cert_fail_name;
}
if (check_host_name((char *)peer_cn, host) < 0)
goto cert_fail_name;
OPENSSL_free(peer_cn);
return 0;
on_error:
OPENSSL_free(peer_cn);
return ssl_set_error(ssl, 0);
cert_fail_name:
OPENSSL_free(peer_cn);
giterr_set(GITERR_SSL, "hostname does not match certificate");
return GIT_ECERTIFICATE;
}
void test_core_posix__inet_pton(void)
{
struct in_addr addr;
struct in6_addr addr6;
size_t i;
struct in_addr_data {
const char *p;
const uint8_t n[4];
};
struct in6_addr_data {
const char *p;
const uint8_t n[16];
};
static struct in_addr_data in_addr_data[] = {
{ "0.0.0.0", { 0, 0, 0, 0 } },
{ "10.42.101.8", { 10, 42, 101, 8 } },
{ "127.0.0.1", { 127, 0, 0, 1 } },
{ "140.177.10.12", { 140, 177, 10, 12 } },
{ "204.232.175.90", { 204, 232, 175, 90 } },
{ "255.255.255.255", { 255, 255, 255, 255 } },
};
static struct in6_addr_data in6_addr_data[] = {
{ "::", { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } },
{ "::1", { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 } },
{ "0:0:0:0:0:0:0:1", { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 } },
{ "2001:db8:8714:3a90::12", { 0x20, 0x01, 0x0d, 0xb8, 0x87, 0x14, 0x3a, 0x90, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x12 } },
{ "fe80::f8ba:c2d6:86be:3645", { 0xfe, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0xba, 0xc2, 0xd6, 0x86, 0xbe, 0x36, 0x45 } },
{ "::ffff:204.152.189.116", { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xcc, 0x98, 0xbd, 0x74 } },
};
/* Test some ipv4 addresses */
for (i = 0; i < 6; i++) {
cl_assert(p_inet_pton(AF_INET, in_addr_data[i].p, &addr) == 1);
cl_assert(memcmp(&addr, in_addr_data[i].n, sizeof(struct in_addr)) == 0);
}
/* Test some ipv6 addresses */
if (supports_ipv6())
{
for (i = 0; i < 6; i++) {
cl_assert(p_inet_pton(AF_INET6, in6_addr_data[i].p, &addr6) == 1);
cl_assert(memcmp(&addr6, in6_addr_data[i].n, sizeof(struct in6_addr)) == 0);
}
}
/* Test some invalid strings */
cl_assert(p_inet_pton(AF_INET, "", &addr) == 0);
cl_assert(p_inet_pton(AF_INET, "foo", &addr) == 0);
cl_assert(p_inet_pton(AF_INET, " 127.0.0.1", &addr) == 0);
cl_assert(p_inet_pton(AF_INET, "bar", &addr) == 0);
cl_assert(p_inet_pton(AF_INET, "10.foo.bar.1", &addr) == 0);
/* Test unsupported address families */
cl_git_fail(p_inet_pton(12, "52.472", NULL)); /* AF_DECnet */
cl_assert_equal_i(EAFNOSUPPORT, errno);
cl_git_fail(p_inet_pton(5, "315.124", NULL)); /* AF_CHAOS */
cl_assert_equal_i(EAFNOSUPPORT, errno);
}
