openkylin
/
libvirt
mirror of https://gitee.com/openkylin/libvirt.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity
libvirt/tests/virnettlshelpers.c

438 lines
14 KiB
C
Raw Blame History

/*
* Copyright (C) 2011-2012 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <fcntl.h>
#include "virnettlshelpers.h"
#include "viralloc.h"
#include "virlog.h"
#include "virfile.h"
#include "virsocketaddr.h"
#include "virutil.h"
#if !defined WIN32 && WITH_LIBTASN1_H && LIBGNUTLS_VERSION_NUMBER >= 0x020600
# define VIR_FROM_THIS VIR_FROM_RPC
VIR_LOG_INIT("tests.nettlshelpers");
/*
* These store some static data that is needed when
* encoding extensions in the x509 certs
*/
asn1_node pkix_asn1;
extern const asn1_static_node pkix_asn1_tab[];
/*
* To avoid consuming random entropy to generate keys,
* here's one we prepared earlier :-)
*/
gnutls_x509_privkey_t privkey;
# define PRIVATE_KEY \
"-----BEGIN PRIVATE KEY-----\n" \
"MIG2AgEAMBAGByqGSM49AgEGBSuBBAAiBIGeMIGbAgEBBDD39t6GRLeEmsYjRGR6\n" \
"iQiIN2S4zXsgLGS/2GloXdG7K+i/3vEJDt9celZ0DfCLcG6hZANiAAQTJIe13jy7\n" \
"k4KTXMkHQHEJa/asH263JaPL5kTbfRa6tMq3DS3pzWlOj+NHY/9JzthrKD+Ece+g\n" \
"2g/POHa0gfXRYXGiHTs8mY0AHFqNNmF38eIVGjOqobIi90MkyI3wx4g=\n" \
"-----END PRIVATE KEY-----\n"
/*
* This loads the private key we defined earlier
*/
static gnutls_x509_privkey_t testTLSLoadKey(void)
{
gnutls_x509_privkey_t key;
const gnutls_datum_t data = { (unsigned char *)PRIVATE_KEY, strlen(PRIVATE_KEY) };
int err;
if ((err = gnutls_x509_privkey_init(&key)) < 0) {
VIR_WARN("Failed to init key %s", gnutls_strerror(err));
abort();
}
if ((err = gnutls_x509_privkey_import(key, &data,
GNUTLS_X509_FMT_PEM)) < 0) {
if (err != GNUTLS_E_BASE64_UNEXPECTED_HEADER_ERROR &&
err != GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE) {
VIR_WARN("Failed to import key %s", gnutls_strerror(err));
abort();
}
if ((err = gnutls_x509_privkey_import_pkcs8(key, &data, GNUTLS_X509_FMT_PEM, NULL, 0)) < 0) {
VIR_WARN("Failed to import PKCS8 key %s", gnutls_strerror(err));
abort();
}
}
return key;
}
void testTLSInit(const char *keyfile)
{
gnutls_global_init();
if (asn1_array2tree(pkix_asn1_tab, &pkix_asn1, NULL) != ASN1_SUCCESS)
abort();
privkey = testTLSLoadKey();
if (virFileWriteStr(keyfile, PRIVATE_KEY, 0600) < 0)
abort();
}
void testTLSCleanup(const char *keyfile)
{
asn1_delete_structure(&pkix_asn1);
unlink(keyfile);
}
/*
* Turns an ASN1 object into a DER encoded byte array
*/
static void testTLSDerEncode(asn1_node src,
const char *src_name,
gnutls_datum_t * res)
{
int size;
char *data = NULL;
size = 0;
asn1_der_coding(src, src_name, NULL, &size, NULL);
data = g_new0(char, size);
asn1_der_coding(src, src_name, data, &size, NULL);
res->data = (unsigned char *)data;
res->size = size;
}
/*
* This is a fairly lame x509 certificate generator.
*
* Do not copy/use this code for generating real certificates
* since it leaves out many things that you would want in
* certificates for real world usage.
*
* This is good enough only for doing tests of the libvirt
* TLS certificate code
*/
void
testTLSGenerateCert(struct testTLSCertReq *req,
gnutls_x509_crt_t ca)
{
gnutls_x509_crt_t crt;
int err;
static char buffer[1024*1024];
size_t size = sizeof(buffer);
char serial[5] = { 1, 2, 3, 4, 0 };
gnutls_datum_t der;
time_t start = time(NULL) + (60*60*req->start_offset);
time_t expire = time(NULL) + (60*60*(req->expire_offset
? req->expire_offset : 24));
/*
* Prepare our new certificate object
*/
if ((err = gnutls_x509_crt_init(&crt)) < 0) {
VIR_WARN("Failed to initialize certificate %s", gnutls_strerror(err));
abort();
}
if ((err = gnutls_x509_crt_set_key(crt, privkey)) < 0) {
VIR_WARN("Failed to set certificate key %s", gnutls_strerror(err));
abort();
}
/*
* A v3 certificate is required in order to be able
* set any of the basic constraints, key purpose and
* key usage data
*/
gnutls_x509_crt_set_version(crt, 3);
if (req->country) {
if ((err = gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COUNTRY_NAME, 0,
req->country, strlen(req->country))) < 0) {
VIR_WARN("Failed to set certificate country name %s", gnutls_strerror(err));
abort();
}
}
if (req->cn) {
if ((err = gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COMMON_NAME, 0,
req->cn, strlen(req->cn))) < 0) {
VIR_WARN("Failed to set certificate common name %s", gnutls_strerror(err));
abort();
}
}
/*
* Setup the subject altnames, which are used
* for hostname checks in live sessions
*/
if (req->altname1) {
if ((err = gnutls_x509_crt_set_subject_alt_name(crt, GNUTLS_SAN_DNSNAME,
req->altname1,
strlen(req->altname1),
GNUTLS_FSAN_APPEND))) {
VIR_WARN("Failed to set certificate alt name %s", gnutls_strerror(err));
abort();
}
}
if (req->altname2) {
if ((err = gnutls_x509_crt_set_subject_alt_name(crt, GNUTLS_SAN_DNSNAME,
req->altname2,
strlen(req->altname2),
GNUTLS_FSAN_APPEND))) {
VIR_WARN("Failed to set certificate %s alt name", gnutls_strerror(err));
abort();
}
}
/*
* IP address need to be put into the cert in their
* raw byte form, not strings, hence this is a little
* more complicated
*/
if (req->ipaddr1) {
virSocketAddr addr;
char *data;
int len;
if (virSocketAddrParse(&addr, req->ipaddr1, 0) < 0) {
VIR_WARN("Cannot parse %s", req->ipaddr1);
abort();
}
if (addr.data.sa.sa_family == AF_INET) {
data = (char*)&addr.data.inet4.sin_addr;
len = 4;
} else {
data = (char*)&addr.data.inet6.sin6_addr;
len = 16;
}
if ((err = gnutls_x509_crt_set_subject_alt_name(crt, GNUTLS_SAN_IPADDRESS,
data, len, GNUTLS_FSAN_APPEND))) {
VIR_WARN("Failed to set certificate alt name %s", gnutls_strerror(err));
abort();
}
}
if (req->ipaddr2) {
virSocketAddr addr;
char *data;
int len;
if (virSocketAddrParse(&addr, req->ipaddr2, 0) < 0) {
VIR_WARN("Cannot parse %s", req->ipaddr2);
abort();
}
if (addr.data.sa.sa_family == AF_INET) {
data = (char*)&addr.data.inet4.sin_addr;
len = 4;
} else {
data = (char*)&addr.data.inet6.sin6_addr;
len = 16;
}
if ((err = gnutls_x509_crt_set_subject_alt_name(crt, GNUTLS_SAN_IPADDRESS,
data, len, GNUTLS_FSAN_APPEND))) {
VIR_WARN("Failed to set certificate alt name %s", gnutls_strerror(err));
abort();
}
}
/*
* Basic constraints are used to decide if the cert
* is for a CA or not. We can't use the convenient
* gnutls API for setting this, since it hardcodes
* the 'critical' field which we want control over
*/
if (req->basicConstraintsEnable) {
asn1_node ext = NULL;
asn1_create_element(pkix_asn1, "PKIX1.BasicConstraints", &ext);
asn1_write_value(ext, "cA", req->basicConstraintsIsCA ? "TRUE" : "FALSE", 1);
asn1_write_value(ext, "pathLenConstraint", NULL, 0);
testTLSDerEncode(ext, "", &der);
if ((err = gnutls_x509_crt_set_extension_by_oid(crt,
"2.5.29.19",
der.data,
der.size,
req->basicConstraintsCritical)) < 0) {
VIR_WARN("Failed to set certificate basic constraints %s", gnutls_strerror(err));
VIR_FREE(der.data);
abort();
}
asn1_delete_structure(&ext);
VIR_FREE(der.data);
}
/*
* Next up the key usage extension. Again we can't
* use the gnutls API since it hardcodes the extension
* to be 'critical'
*/
if (req->keyUsageEnable) {
asn1_node ext = NULL;
char str[2];
str[0] = req->keyUsageValue & 0xff;
str[1] = (req->keyUsageValue >> 8) & 0xff;
asn1_create_element(pkix_asn1, "PKIX1.KeyUsage", &ext);
asn1_write_value(ext, "", str, 9);
testTLSDerEncode(ext, "", &der);
if ((err = gnutls_x509_crt_set_extension_by_oid(crt,
"2.5.29.15",
der.data,
der.size,
req->keyUsageCritical)) < 0) {
VIR_WARN("Failed to set certificate key usage %s", gnutls_strerror(err));
VIR_FREE(der.data);
abort();
}
asn1_delete_structure(&ext);
VIR_FREE(der.data);
}
/*
* Finally the key purpose extension. This time
* gnutls has the opposite problem, always hardcoding
* it to be non-critical. So once again we have to
* set this the hard way building up ASN1 data ourselves
*/
if (req->keyPurposeEnable) {
asn1_node ext = NULL;
asn1_create_element(pkix_asn1, "PKIX1.ExtKeyUsageSyntax", &ext);
if (req->keyPurposeOID1) {
asn1_write_value(ext, "", "NEW", 1);
asn1_write_value(ext, "?LAST", req->keyPurposeOID1, 1);
}
if (req->keyPurposeOID2) {
asn1_write_value(ext, "", "NEW", 1);
asn1_write_value(ext, "?LAST", req->keyPurposeOID2, 1);
}
testTLSDerEncode(ext, "", &der);
if ((err = gnutls_x509_crt_set_extension_by_oid(crt,
"2.5.29.37",
der.data,
der.size,
req->keyPurposeCritical)) < 0) {
VIR_WARN("Failed to set certificate key purpose %s", gnutls_strerror(err));
VIR_FREE(der.data);
abort();
}
asn1_delete_structure(&ext);
VIR_FREE(der.data);
}
/*
* Any old serial number will do, so lets pick 5
*/
if ((err = gnutls_x509_crt_set_serial(crt, serial, 5)) < 0) {
VIR_WARN("Failed to set certificate serial %s", gnutls_strerror(err));
abort();
}
if ((err = gnutls_x509_crt_set_activation_time(crt, start)) < 0) {
VIR_WARN("Failed to set certificate activation %s", gnutls_strerror(err));
abort();
}
if ((err = gnutls_x509_crt_set_expiration_time(crt, expire)) < 0) {
VIR_WARN("Failed to set certificate expiration %s", gnutls_strerror(err));
abort();
}
/*
* If no 'ca' is set then we are self signing
* the cert. This is done for the root CA certs
*/
if ((err = gnutls_x509_crt_sign2(crt, ca ? ca : crt, privkey, GNUTLS_DIG_SHA256, 0)) < 0) {
VIR_WARN("Failed to sign certificate %s", gnutls_strerror(err));
abort();
}
/*
* Finally write the new cert out to disk
*/
if ((err = gnutls_x509_crt_export(crt, GNUTLS_X509_FMT_PEM, buffer, &size)) < 0) {
VIR_WARN("Failed to export certificate %s", gnutls_strerror(err));
abort();
}
if (virFileWriteStr(req->filename, buffer, 0600) < 0) {
VIR_WARN("Failed to write certificate %s %s", req->filename, gnutls_strerror(err));
abort();
}
req->crt = crt;
return;
}
void testTLSWriteCertChain(const char *filename,
gnutls_x509_crt_t *certs,
size_t ncerts)
{
size_t i;
VIR_AUTOCLOSE fd = -1;
int err;
static char buffer[1024*1024];
size_t size;
if ((fd = open(filename, O_WRONLY|O_CREAT, 0600)) < 0) {
VIR_WARN("Failed to open %s", filename);
abort();
}
for (i = 0; i < ncerts; i++) {
size = sizeof(buffer);
if ((err = gnutls_x509_crt_export(certs[i], GNUTLS_X509_FMT_PEM, buffer, &size)) < 0) {
VIR_WARN("Failed to export certificate %s", gnutls_strerror(err));
unlink(filename);
abort();
}
if (safewrite(fd, buffer, size) != size) {
VIR_WARN("Failed to write certificate to %s", filename);
unlink(filename);
abort();
}
}
}
void testTLSDiscardCert(struct testTLSCertReq *req)
{
if (!req->crt)
return;
g_clear_pointer(&req->crt, gnutls_x509_crt_deinit);
if (getenv("VIRT_TEST_DEBUG_CERTS") == NULL)
unlink(req->filename);
}
#endif
Reference in New Issue View Git Blame Copy Permalink