/* This function will print information about this session's peer
* certificate.
*/
void
print_x509_certificate_info (gnutls_session_t session)
{
char serial[40];
char dn[256];
size_t size;
unsigned int algo, bits;
time_t expiration_time, activation_time;
const gnutls_datum_t *cert_list;
unsigned int cert_list_size = 0;
gnutls_x509_crt_t cert;
gnutls_datum_t cinfo;
/* This function only works for X.509 certificates.
*/
if (gnutls_certificate_type_get (session) != GNUTLS_CRT_X509)
return;
cert_list = gnutls_certificate_get_peers (session, &cert_list_size);
printf ("Peer provided %d certificates.\n", cert_list_size);
if (cert_list_size > 0)
{
int ret;
/* we only print information about the first certificate.
*/
gnutls_x509_crt_init (&cert);
gnutls_x509_crt_import (cert, &cert_list[0], GNUTLS_X509_FMT_DER);
printf ("Certificate info:\n");
/* This is the preferred way of printing short information about
a certificate. */
ret = gnutls_x509_crt_print (cert, GNUTLS_CRT_PRINT_ONELINE, &cinfo);
if (ret == 0)
{
printf ("\t%s\n", cinfo.data);
gnutls_free (cinfo.data);
}
/* If you want to extract fields manually for some other reason,
below are popular example calls. */
expiration_time = gnutls_x509_crt_get_expiration_time (cert);
activation_time = gnutls_x509_crt_get_activation_time (cert);
printf ("\tCertificate is valid since: %s", ctime (&activation_time));
printf ("\tCertificate expires: %s", ctime (&expiration_time));
/* Print the serial number of the certificate.
*/
size = sizeof (serial);
gnutls_x509_crt_get_serial (cert, serial, &size);
printf ("\tCertificate serial number: %s\n", bin2hex (serial, size));
/* Extract some of the public key algorithm's parameters
*/
algo = gnutls_x509_crt_get_pk_algorithm (cert, &bits);
printf ("Certificate public key: %s",
gnutls_pk_algorithm_get_name (algo));
/* Print the version of the X.509
* certificate.
*/
printf ("\tCertificate version: #%d\n",
gnutls_x509_crt_get_version (cert));
size = sizeof (dn);
gnutls_x509_crt_get_dn (cert, dn, &size);
printf ("\tDN: %s\n", dn);
size = sizeof (dn);
gnutls_x509_crt_get_issuer_dn (cert, dn, &size);
printf ("\tIssuer's DN: %s\n", dn);
gnutls_x509_crt_deinit (cert);
}
}
static CURLcode
gtls_connect_step3(struct connectdata *conn,
int sockindex)
{
unsigned int cert_list_size;
const gnutls_datum *chainp;
unsigned int verify_status;
gnutls_x509_crt x509_cert,x509_issuer;
gnutls_datum issuerp;
char certbuf[256]; /* big enough? */
size_t size;
unsigned int algo;
unsigned int bits;
time_t certclock;
const char *ptr;
struct SessionHandle *data = conn->data;
gnutls_session session = conn->ssl[sockindex].session;
int rc;
int incache;
void *ssl_sessionid;
CURLcode result = CURLE_OK;
/* This function will return the peer's raw certificate (chain) as sent by
the peer. These certificates are in raw format (DER encoded for
X.509). In case of a X.509 then a certificate list may be present. The
first certificate in the list is the peer's certificate, following the
issuer's certificate, then the issuer's issuer etc. */
chainp = gnutls_certificate_get_peers(session, &cert_list_size);
if(!chainp) {
if(data->set.ssl.verifypeer ||
data->set.ssl.verifyhost ||
data->set.ssl.issuercert) {
#ifdef USE_TLS_SRP
if(data->set.ssl.authtype == CURL_TLSAUTH_SRP
&& data->set.ssl.username != NULL
&& !data->set.ssl.verifypeer
&& gnutls_cipher_get(session)) {
/* no peer cert, but auth is ok if we have SRP user and cipher and no
peer verify */
}
else {
#endif
failf(data, "failed to get server cert");
return CURLE_PEER_FAILED_VERIFICATION;
#ifdef USE_TLS_SRP
}
#endif
}
infof(data, "\t common name: WARNING couldn't obtain\n");
}
if(data->set.ssl.verifypeer) {
/* This function will try to verify the peer's certificate and return its
status (trusted, invalid etc.). The value of status should be one or
more of the gnutls_certificate_status_t enumerated elements bitwise
or'd. To avoid denial of service attacks some default upper limits
regarding the certificate key size and chain size are set. To override
them use gnutls_certificate_set_verify_limits(). */
rc = gnutls_certificate_verify_peers2(session, &verify_status);
if(rc < 0) {
failf(data, "server cert verify failed: %d", rc);
return CURLE_SSL_CONNECT_ERROR;
}
/* verify_status is a bitmask of gnutls_certificate_status bits */
if(verify_status & GNUTLS_CERT_INVALID) {
if(data->set.ssl.verifypeer) {
failf(data, "server certificate verification failed. CAfile: %s "
"CRLfile: %s", data->set.ssl.CAfile?data->set.ssl.CAfile:"none",
data->set.ssl.CRLfile?data->set.ssl.CRLfile:"none");
return CURLE_SSL_CACERT;
}
else
infof(data, "\t server certificate verification FAILED\n");
}
else
infof(data, "\t server certificate verification OK\n");
}
else {
infof(data, "\t server certificate verification SKIPPED\n");
goto after_server_cert_verification;
}
/* initialize an X.509 certificate structure. */
gnutls_x509_crt_init(&x509_cert);
/* convert the given DER or PEM encoded Certificate to the native
gnutls_x509_crt_t format */
gnutls_x509_crt_import(x509_cert, chainp, GNUTLS_X509_FMT_DER);
if (data->set.ssl.issuercert) {
gnutls_x509_crt_init(&x509_issuer);
issuerp = load_file(data->set.ssl.issuercert);
gnutls_x509_crt_import(x509_issuer, &issuerp, GNUTLS_X509_FMT_PEM);
rc = gnutls_x509_crt_check_issuer(x509_cert,x509_issuer);
unload_file(issuerp);
if (rc <= 0) {
failf(data, "server certificate issuer check failed (IssuerCert: %s)",
data->set.ssl.issuercert?data->set.ssl.issuercert:"none");
return CURLE_SSL_ISSUER_ERROR;
}
infof(data,"\t server certificate issuer check OK (Issuer Cert: %s)\n",
data->set.ssl.issuercert?data->set.ssl.issuercert:"none");
}
size=sizeof(certbuf);
rc = gnutls_x509_crt_get_dn_by_oid(x509_cert, GNUTLS_OID_X520_COMMON_NAME,
0, /* the first and only one */
FALSE,
certbuf,
&size);
if(rc) {
infof(data, "error fetching CN from cert:%s\n",
gnutls_strerror(rc));
}
/* This function will check if the given certificate's subject matches the
given hostname. This is a basic implementation of the matching described
in RFC2818 (HTTPS), which takes into account wildcards, and the subject
alternative name PKIX extension. Returns non zero on success, and zero on
failure. */
rc = gnutls_x509_crt_check_hostname(x509_cert, conn->host.name);
if(!rc) {
if(data->set.ssl.verifyhost > 1) {
failf(data, "SSL: certificate subject name (%s) does not match "
"target host name '%s'", certbuf, conn->host.dispname);
gnutls_x509_crt_deinit(x509_cert);
return CURLE_PEER_FAILED_VERIFICATION;
}
else
infof(data, "\t common name: %s (does not match '%s')\n",
certbuf, conn->host.dispname);
}
else
infof(data, "\t common name: %s (matched)\n", certbuf);
/* Check for time-based validity */
certclock = gnutls_x509_crt_get_expiration_time(x509_cert);
if(certclock == (time_t)-1) {
failf(data, "server cert expiration date verify failed");
return CURLE_SSL_CONNECT_ERROR;
}
if(certclock < time(NULL)) {
if(data->set.ssl.verifypeer) {
failf(data, "server certificate expiration date has passed.");
return CURLE_PEER_FAILED_VERIFICATION;
}
else
infof(data, "\t server certificate expiration date FAILED\n");
}
else
infof(data, "\t server certificate expiration date OK\n");
certclock = gnutls_x509_crt_get_activation_time(x509_cert);
if(certclock == (time_t)-1) {
failf(data, "server cert activation date verify failed");
return CURLE_SSL_CONNECT_ERROR;
}
if(certclock > time(NULL)) {
if(data->set.ssl.verifypeer) {
failf(data, "server certificate not activated yet.");
return CURLE_PEER_FAILED_VERIFICATION;
}
else
infof(data, "\t server certificate activation date FAILED\n");
}
else
infof(data, "\t server certificate activation date OK\n");
/* Show:
- ciphers used
- subject
- start date
- expire date
- common name
- issuer
*/
/* public key algorithm's parameters */
algo = gnutls_x509_crt_get_pk_algorithm(x509_cert, &bits);
infof(data, "\t certificate public key: %s\n",
gnutls_pk_algorithm_get_name(algo));
/* version of the X.509 certificate. */
infof(data, "\t certificate version: #%d\n",
gnutls_x509_crt_get_version(x509_cert));
size = sizeof(certbuf);
gnutls_x509_crt_get_dn(x509_cert, certbuf, &size);
infof(data, "\t subject: %s\n", certbuf);
certclock = gnutls_x509_crt_get_activation_time(x509_cert);
showtime(data, "start date", certclock);
certclock = gnutls_x509_crt_get_expiration_time(x509_cert);
showtime(data, "expire date", certclock);
size = sizeof(certbuf);
gnutls_x509_crt_get_issuer_dn(x509_cert, certbuf, &size);
infof(data, "\t issuer: %s\n", certbuf);
gnutls_x509_crt_deinit(x509_cert);
after_server_cert_verification:
/* compression algorithm (if any) */
ptr = gnutls_compression_get_name(gnutls_compression_get(session));
/* the *_get_name() says "NULL" if GNUTLS_COMP_NULL is returned */
infof(data, "\t compression: %s\n", ptr);
/* the name of the cipher used. ie 3DES. */
ptr = gnutls_cipher_get_name(gnutls_cipher_get(session));
infof(data, "\t cipher: %s\n", ptr);
/* the MAC algorithms name. ie SHA1 */
ptr = gnutls_mac_get_name(gnutls_mac_get(session));
infof(data, "\t MAC: %s\n", ptr);
conn->ssl[sockindex].state = ssl_connection_complete;
conn->recv[sockindex] = gtls_recv;
conn->send[sockindex] = gtls_send;
{
/* we always unconditionally get the session id here, as even if we
already got it from the cache and asked to use it in the connection, it
might've been rejected and then a new one is in use now and we need to
detect that. */
void *connect_sessionid;
size_t connect_idsize;
/* get the session ID data size */
gnutls_session_get_data(session, NULL, &connect_idsize);
connect_sessionid = malloc(connect_idsize); /* get a buffer for it */
if(connect_sessionid) {
/* extract session ID to the allocated buffer */
gnutls_session_get_data(session, connect_sessionid, &connect_idsize);
incache = !(Curl_ssl_getsessionid(conn, &ssl_sessionid, NULL));
if (incache) {
/* there was one before in the cache, so instead of risking that the
previous one was rejected, we just kill that and store the new */
Curl_ssl_delsessionid(conn, ssl_sessionid);
}
/* store this session id */
result = Curl_ssl_addsessionid(conn, connect_sessionid, connect_idsize);
if(result) {
free(connect_sessionid);
result = CURLE_OUT_OF_MEMORY;
}
}
else
result = CURLE_OUT_OF_MEMORY;
}
return result;
}
void doit(void)
{
#ifdef ENABLE_NON_SUITEB_CURVES
const char *filename, *password = "******";
gnutls_pkcs12_t pkcs12;
gnutls_datum_t data;
gnutls_x509_crt_t *chain, *extras;
unsigned int chain_size = 0, extras_size = 0, i;
gnutls_x509_privkey_t pkey;
int ret;
ret = global_init();
if (ret < 0)
fail("global_init failed %d\n", ret);
gnutls_global_set_log_function(tls_log_func);
if (debug)
gnutls_global_set_log_level(2);
ret = gnutls_pkcs12_init(&pkcs12);
if (ret < 0)
fail("initialization failed: %s\n", gnutls_strerror(ret));
filename = getenv("PKCS12_MANY_CERTS_FILE");
if (!filename)
filename = "pkcs12-decode/pkcs12_5certs.p12";
if (debug)
success
("Reading PKCS#12 blob from `%s' using password `%s'.\n",
filename, password);
ret = gnutls_load_file(filename, &data);
if (ret < 0)
fail("cannot open file");
ret = gnutls_pkcs12_import(pkcs12, &data, GNUTLS_X509_FMT_DER, 0);
if (ret < 0)
fail("pkcs12_import failed %d: %s\n", ret,
gnutls_strerror(ret));
if (debug)
success("Read file OK\n");
ret =
gnutls_pkcs12_simple_parse(pkcs12, password, &pkey, &chain,
&chain_size, &extras, &extras_size,
NULL, 0);
if (ret < 0)
fail("pkcs12_simple_parse failed %d: %s\n", ret,
gnutls_strerror(ret));
if (chain_size != 1)
fail("chain size (%u) should have been 1\n", chain_size);
if (extras_size != 4)
fail("extras size (%u) should have been 4\n", extras_size);
if (debug) {
char dn[512];
size_t dn_size;
dn_size = sizeof(dn);
ret = gnutls_x509_crt_get_dn(chain[0], dn, &dn_size);
if (ret < 0)
fail("crt_get_dn failed %d: %s\n", ret,
gnutls_strerror(ret));
success("dn: %s\n", dn);
dn_size = sizeof(dn);
ret =
gnutls_x509_crt_get_issuer_dn(chain[0], dn, &dn_size);
if (ret < 0)
fail("crt_get_dn failed %d: %s\n", ret,
gnutls_strerror(ret));
success("issuer dn: %s\n", dn);
}
gnutls_pkcs12_deinit(pkcs12);
gnutls_x509_privkey_deinit(pkey);
for (i = 0; i < chain_size; i++)
gnutls_x509_crt_deinit(chain[i]);
gnutls_free(chain);
for (i = 0; i < extras_size; i++)
gnutls_x509_crt_deinit(extras[i]);
gnutls_free(extras);
/* Try gnutls_x509_privkey_import2() */
ret = gnutls_x509_privkey_init(&pkey);
if (ret < 0)
fail("gnutls_x509_privkey_init failed %d: %s\n", ret,
gnutls_strerror(ret));
ret =
gnutls_x509_privkey_import2(pkey, &data, GNUTLS_X509_FMT_DER,
password, 0);
if (ret < 0)
fail("gnutls_x509_privkey_import2 failed %d: %s\n", ret,
gnutls_strerror(ret));
gnutls_x509_privkey_deinit(pkey);
free(data.data);
gnutls_global_deinit();
#else
exit(77);
#endif
}
static void ssl_gnutls_handshake_cb(gpointer data, gint source,
PurpleInputCondition cond)
{
PurpleSslConnection *gsc = data;
PurpleSslGnutlsData *gnutls_data = PURPLE_SSL_GNUTLS_DATA(gsc);
ssize_t ret;
/*purple_debug_info("gnutls", "Handshaking with %s\n", gsc->host);*/
ret = gnutls_handshake(gnutls_data->session);
if(ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED)
return;
purple_input_remove(gnutls_data->handshake_handler);
gnutls_data->handshake_handler = 0;
if(ret != 0) {
purple_debug_error("gnutls", "Handshake failed. Error %s\n",
gnutls_strerror(ret));
if(gsc->error_cb != NULL)
gsc->error_cb(gsc, PURPLE_SSL_HANDSHAKE_FAILED,
gsc->connect_cb_data);
purple_ssl_close(gsc);
} else {
/* Now we are cooking with gas! */
PurpleSslOps *ops = purple_ssl_get_ops();
GList * peers = ops->get_peer_certificates(gsc);
PurpleCertificateScheme *x509 =
purple_certificate_find_scheme("x509");
GList * l;
/* TODO: Remove all this debugging babble */
purple_debug_info("gnutls", "Handshake complete\n");
for (l=peers; l; l = l->next) {
PurpleCertificate *crt = l->data;
GByteArray *z =
x509->get_fingerprint_sha1(crt);
gchar * fpr =
purple_base16_encode_chunked(z->data,
z->len);
purple_debug_info("gnutls/x509",
"Key print: %s\n",
fpr);
/* Kill the cert! */
x509->destroy_certificate(crt);
g_free(fpr);
g_byte_array_free(z, TRUE);
}
g_list_free(peers);
{
const gnutls_datum_t *cert_list;
unsigned int cert_list_size = 0;
gnutls_session_t session=gnutls_data->session;
guint i;
cert_list =
gnutls_certificate_get_peers(session, &cert_list_size);
purple_debug_info("gnutls",
"Peer provided %d certs\n",
cert_list_size);
for (i=0; i<cert_list_size; i++)
{
gchar fpr_bin[256];
gsize fpr_bin_sz = sizeof(fpr_bin);
gchar * fpr_asc = NULL;
gchar tbuf[256];
gsize tsz=sizeof(tbuf);
gchar * tasc = NULL;
gnutls_x509_crt_t cert;
gnutls_x509_crt_init(&cert);
gnutls_x509_crt_import (cert, &cert_list[i],
GNUTLS_X509_FMT_DER);
gnutls_x509_crt_get_fingerprint(cert, GNUTLS_DIG_SHA,
fpr_bin, &fpr_bin_sz);
fpr_asc =
purple_base16_encode_chunked((const guchar *)fpr_bin, fpr_bin_sz);
purple_debug_info("gnutls",
"Lvl %d SHA1 fingerprint: %s\n",
i, fpr_asc);
tsz=sizeof(tbuf);
gnutls_x509_crt_get_serial(cert,tbuf,&tsz);
tasc=purple_base16_encode_chunked((const guchar *)tbuf, tsz);
purple_debug_info("gnutls",
"Serial: %s\n",
tasc);
g_free(tasc);
tsz=sizeof(tbuf);
gnutls_x509_crt_get_dn (cert, tbuf, &tsz);
purple_debug_info("gnutls",
"Cert DN: %s\n",
tbuf);
tsz=sizeof(tbuf);
gnutls_x509_crt_get_issuer_dn (cert, tbuf, &tsz);
purple_debug_info("gnutls",
"Cert Issuer DN: %s\n",
tbuf);
g_free(fpr_asc);
fpr_asc = NULL;
gnutls_x509_crt_deinit(cert);
}
}
/* TODO: The following logic should really be in libpurple */
/* If a Verifier was given, hand control over to it */
if (gsc->verifier) {
GList *peers;
/* First, get the peer cert chain */
peers = purple_ssl_get_peer_certificates(gsc);
/* Now kick off the verification process */
purple_certificate_verify(gsc->verifier,
gsc->host,
peers,
ssl_gnutls_verified_cb,
gsc);
purple_certificate_destroy_list(peers);
} else {
/* Otherwise, just call the "connection complete"
callback */
gsc->connect_cb(gsc->connect_cb_data, gsc, cond);
}
}
}
static CURLcode
gtls_connect_step3(struct connectdata *conn,
int sockindex)
{
unsigned int cert_list_size;
const gnutls_datum_t *chainp;
unsigned int verify_status = 0;
gnutls_x509_crt_t x509_cert, x509_issuer;
gnutls_datum_t issuerp;
char certbuf[256] = ""; /* big enough? */
size_t size;
unsigned int algo;
unsigned int bits;
time_t certclock;
const char *ptr;
struct SessionHandle *data = conn->data;
gnutls_session_t session = conn->ssl[sockindex].session;
int rc;
bool incache;
void *ssl_sessionid;
#ifdef HAS_ALPN
gnutls_datum_t proto;
#endif
CURLcode result = CURLE_OK;
gnutls_protocol_t version = gnutls_protocol_get_version(session);
/* the name of the cipher suite used, e.g. ECDHE_RSA_AES_256_GCM_SHA384. */
ptr = gnutls_cipher_suite_get_name(gnutls_kx_get(session),
gnutls_cipher_get(session),
gnutls_mac_get(session));
infof(data, "SSL connection using %s / %s\n",
gnutls_protocol_get_name(version), ptr);
/* This function will return the peer's raw certificate (chain) as sent by
the peer. These certificates are in raw format (DER encoded for
X.509). In case of a X.509 then a certificate list may be present. The
first certificate in the list is the peer's certificate, following the
issuer's certificate, then the issuer's issuer etc. */
chainp = gnutls_certificate_get_peers(session, &cert_list_size);
if(!chainp) {
if(data->set.ssl.verifypeer ||
data->set.ssl.verifyhost ||
data->set.ssl.issuercert) {
#ifdef USE_TLS_SRP
if(data->set.ssl.authtype == CURL_TLSAUTH_SRP
&& data->set.ssl.username != NULL
&& !data->set.ssl.verifypeer
&& gnutls_cipher_get(session)) {
/* no peer cert, but auth is ok if we have SRP user and cipher and no
peer verify */
}
else {
#endif
failf(data, "failed to get server cert");
return CURLE_PEER_FAILED_VERIFICATION;
#ifdef USE_TLS_SRP
}
#endif
}
infof(data, "\t common name: WARNING couldn't obtain\n");
}
if(data->set.ssl.certinfo && chainp) {
unsigned int i;
result = Curl_ssl_init_certinfo(data, cert_list_size);
if(result)
return result;
for(i = 0; i < cert_list_size; i++) {
const char *beg = (const char *) chainp[i].data;
const char *end = beg + chainp[i].size;
result = Curl_extract_certinfo(conn, i, beg, end);
if(result)
return result;
}
}
if(data->set.ssl.verifypeer) {
/* This function will try to verify the peer's certificate and return its
status (trusted, invalid etc.). The value of status should be one or
more of the gnutls_certificate_status_t enumerated elements bitwise
or'd. To avoid denial of service attacks some default upper limits
regarding the certificate key size and chain size are set. To override
them use gnutls_certificate_set_verify_limits(). */
rc = gnutls_certificate_verify_peers2(session, &verify_status);
if(rc < 0) {
failf(data, "server cert verify failed: %d", rc);
return CURLE_SSL_CONNECT_ERROR;
}
/* verify_status is a bitmask of gnutls_certificate_status bits */
if(verify_status & GNUTLS_CERT_INVALID) {
if(data->set.ssl.verifypeer) {
failf(data, "server certificate verification failed. CAfile: %s "
"CRLfile: %s", data->set.ssl.CAfile?data->set.ssl.CAfile:"none",
data->set.ssl.CRLfile?data->set.ssl.CRLfile:"none");
return CURLE_SSL_CACERT;
}
else
infof(data, "\t server certificate verification FAILED\n");
}
else
infof(data, "\t server certificate verification OK\n");
}
else
infof(data, "\t server certificate verification SKIPPED\n");
#ifdef HAS_OCSP
if(data->set.ssl.verifystatus) {
if(gnutls_ocsp_status_request_is_checked(session, 0) == 0) {
gnutls_datum_t status_request;
gnutls_ocsp_resp_t ocsp_resp;
gnutls_ocsp_cert_status_t status;
gnutls_x509_crl_reason_t reason;
rc = gnutls_ocsp_status_request_get(session, &status_request);
infof(data, "\t server certificate status verification FAILED\n");
if(rc == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE) {
failf(data, "No OCSP response received");
return CURLE_SSL_INVALIDCERTSTATUS;
}
if(rc < 0) {
failf(data, "Invalid OCSP response received");
return CURLE_SSL_INVALIDCERTSTATUS;
}
gnutls_ocsp_resp_init(&ocsp_resp);
rc = gnutls_ocsp_resp_import(ocsp_resp, &status_request);
if(rc < 0) {
failf(data, "Invalid OCSP response received");
return CURLE_SSL_INVALIDCERTSTATUS;
}
rc = gnutls_ocsp_resp_get_single(ocsp_resp, 0, NULL, NULL, NULL, NULL,
&status, NULL, NULL, NULL, &reason);
switch(status) {
case GNUTLS_OCSP_CERT_GOOD:
break;
case GNUTLS_OCSP_CERT_REVOKED: {
const char *crl_reason;
switch(reason) {
default:
case GNUTLS_X509_CRLREASON_UNSPECIFIED:
crl_reason = "unspecified reason";
break;
case GNUTLS_X509_CRLREASON_KEYCOMPROMISE:
crl_reason = "private key compromised";
break;
case GNUTLS_X509_CRLREASON_CACOMPROMISE:
crl_reason = "CA compromised";
break;
case GNUTLS_X509_CRLREASON_AFFILIATIONCHANGED:
crl_reason = "affiliation has changed";
break;
case GNUTLS_X509_CRLREASON_SUPERSEDED:
crl_reason = "certificate superseded";
break;
case GNUTLS_X509_CRLREASON_CESSATIONOFOPERATION:
crl_reason = "operation has ceased";
break;
case GNUTLS_X509_CRLREASON_CERTIFICATEHOLD:
crl_reason = "certificate is on hold";
break;
case GNUTLS_X509_CRLREASON_REMOVEFROMCRL:
crl_reason = "will be removed from delta CRL";
break;
case GNUTLS_X509_CRLREASON_PRIVILEGEWITHDRAWN:
crl_reason = "privilege withdrawn";
break;
case GNUTLS_X509_CRLREASON_AACOMPROMISE:
crl_reason = "AA compromised";
break;
}
failf(data, "Server certificate was revoked: %s", crl_reason);
break;
}
default:
case GNUTLS_OCSP_CERT_UNKNOWN:
failf(data, "Server certificate status is unknown");
break;
}
gnutls_ocsp_resp_deinit(ocsp_resp);
return CURLE_SSL_INVALIDCERTSTATUS;
}
else
infof(data, "\t server certificate status verification OK\n");
}
else
infof(data, "\t server certificate status verification SKIPPED\n");
#endif
/* initialize an X.509 certificate structure. */
gnutls_x509_crt_init(&x509_cert);
if(chainp)
/* convert the given DER or PEM encoded Certificate to the native
gnutls_x509_crt_t format */
gnutls_x509_crt_import(x509_cert, chainp, GNUTLS_X509_FMT_DER);
if(data->set.ssl.issuercert) {
gnutls_x509_crt_init(&x509_issuer);
issuerp = load_file(data->set.ssl.issuercert);
gnutls_x509_crt_import(x509_issuer, &issuerp, GNUTLS_X509_FMT_PEM);
rc = gnutls_x509_crt_check_issuer(x509_cert, x509_issuer);
gnutls_x509_crt_deinit(x509_issuer);
unload_file(issuerp);
if(rc <= 0) {
failf(data, "server certificate issuer check failed (IssuerCert: %s)",
data->set.ssl.issuercert?data->set.ssl.issuercert:"none");
gnutls_x509_crt_deinit(x509_cert);
return CURLE_SSL_ISSUER_ERROR;
}
infof(data, "\t server certificate issuer check OK (Issuer Cert: %s)\n",
data->set.ssl.issuercert?data->set.ssl.issuercert:"none");
}
size=sizeof(certbuf);
rc = gnutls_x509_crt_get_dn_by_oid(x509_cert, GNUTLS_OID_X520_COMMON_NAME,
0, /* the first and only one */
FALSE,
certbuf,
&size);
if(rc) {
infof(data, "error fetching CN from cert:%s\n",
gnutls_strerror(rc));
}
/* This function will check if the given certificate's subject matches the
given hostname. This is a basic implementation of the matching described
in RFC2818 (HTTPS), which takes into account wildcards, and the subject
alternative name PKIX extension. Returns non zero on success, and zero on
failure. */
rc = gnutls_x509_crt_check_hostname(x509_cert, conn->host.name);
#if GNUTLS_VERSION_NUMBER < 0x030306
/* Before 3.3.6, gnutls_x509_crt_check_hostname() didn't check IP
addresses. */
if(!rc) {
#ifdef ENABLE_IPV6
#define use_addr in6_addr
#else
#define use_addr in_addr
#endif
unsigned char addrbuf[sizeof(struct use_addr)];
unsigned char certaddr[sizeof(struct use_addr)];
size_t addrlen = 0, certaddrlen;
int i;
int ret = 0;
if(Curl_inet_pton(AF_INET, conn->host.name, addrbuf) > 0)
addrlen = 4;
#ifdef ENABLE_IPV6
else if(Curl_inet_pton(AF_INET6, conn->host.name, addrbuf) > 0)
addrlen = 16;
#endif
if(addrlen) {
for(i=0; ; i++) {
certaddrlen = sizeof(certaddr);
ret = gnutls_x509_crt_get_subject_alt_name(x509_cert, i, certaddr,
&certaddrlen, NULL);
/* If this happens, it wasn't an IP address. */
if(ret == GNUTLS_E_SHORT_MEMORY_BUFFER)
continue;
if(ret < 0)
break;
if(ret != GNUTLS_SAN_IPADDRESS)
continue;
if(certaddrlen == addrlen && !memcmp(addrbuf, certaddr, addrlen)) {
rc = 1;
break;
}
}
}
}
#endif
if(!rc) {
if(data->set.ssl.verifyhost) {
failf(data, "SSL: certificate subject name (%s) does not match "
"target host name '%s'", certbuf, conn->host.dispname);
gnutls_x509_crt_deinit(x509_cert);
return CURLE_PEER_FAILED_VERIFICATION;
}
else
infof(data, "\t common name: %s (does not match '%s')\n",
certbuf, conn->host.dispname);
}
else
infof(data, "\t common name: %s (matched)\n", certbuf);
/* Check for time-based validity */
certclock = gnutls_x509_crt_get_expiration_time(x509_cert);
if(certclock == (time_t)-1) {
if(data->set.ssl.verifypeer) {
failf(data, "server cert expiration date verify failed");
gnutls_x509_crt_deinit(x509_cert);
return CURLE_SSL_CONNECT_ERROR;
}
else
infof(data, "\t server certificate expiration date verify FAILED\n");
}
else {
if(certclock < time(NULL)) {
if(data->set.ssl.verifypeer) {
failf(data, "server certificate expiration date has passed.");
gnutls_x509_crt_deinit(x509_cert);
return CURLE_PEER_FAILED_VERIFICATION;
}
else
infof(data, "\t server certificate expiration date FAILED\n");
}
else
infof(data, "\t server certificate expiration date OK\n");
}
certclock = gnutls_x509_crt_get_activation_time(x509_cert);
if(certclock == (time_t)-1) {
if(data->set.ssl.verifypeer) {
failf(data, "server cert activation date verify failed");
gnutls_x509_crt_deinit(x509_cert);
return CURLE_SSL_CONNECT_ERROR;
}
else
infof(data, "\t server certificate activation date verify FAILED\n");
}
else {
if(certclock > time(NULL)) {
if(data->set.ssl.verifypeer) {
failf(data, "server certificate not activated yet.");
gnutls_x509_crt_deinit(x509_cert);
return CURLE_PEER_FAILED_VERIFICATION;
}
else
infof(data, "\t server certificate activation date FAILED\n");
}
else
infof(data, "\t server certificate activation date OK\n");
}
ptr = data->set.str[STRING_SSL_PINNEDPUBLICKEY];
if(ptr) {
result = pkp_pin_peer_pubkey(data, x509_cert, ptr);
if(result != CURLE_OK) {
failf(data, "SSL: public key does not match pinned public key!");
gnutls_x509_crt_deinit(x509_cert);
return result;
}
}
/* Show:
- subject
- start date
- expire date
- common name
- issuer
*/
/* public key algorithm's parameters */
algo = gnutls_x509_crt_get_pk_algorithm(x509_cert, &bits);
infof(data, "\t certificate public key: %s\n",
gnutls_pk_algorithm_get_name(algo));
/* version of the X.509 certificate. */
infof(data, "\t certificate version: #%d\n",
gnutls_x509_crt_get_version(x509_cert));
size = sizeof(certbuf);
gnutls_x509_crt_get_dn(x509_cert, certbuf, &size);
infof(data, "\t subject: %s\n", certbuf);
certclock = gnutls_x509_crt_get_activation_time(x509_cert);
showtime(data, "start date", certclock);
certclock = gnutls_x509_crt_get_expiration_time(x509_cert);
showtime(data, "expire date", certclock);
size = sizeof(certbuf);
gnutls_x509_crt_get_issuer_dn(x509_cert, certbuf, &size);
infof(data, "\t issuer: %s\n", certbuf);
gnutls_x509_crt_deinit(x509_cert);
/* compression algorithm (if any) */
ptr = gnutls_compression_get_name(gnutls_compression_get(session));
/* the *_get_name() says "NULL" if GNUTLS_COMP_NULL is returned */
infof(data, "\t compression: %s\n", ptr);
#ifdef HAS_ALPN
if(data->set.ssl_enable_alpn) {
rc = gnutls_alpn_get_selected_protocol(session, &proto);
if(rc == 0) {
infof(data, "ALPN, server accepted to use %.*s\n", proto.size,
proto.data);
#ifdef USE_NGHTTP2
if(proto.size == NGHTTP2_PROTO_VERSION_ID_LEN &&
!memcmp(NGHTTP2_PROTO_VERSION_ID, proto.data,
NGHTTP2_PROTO_VERSION_ID_LEN)) {
conn->negnpn = CURL_HTTP_VERSION_2;
}
else
#endif
if(proto.size == ALPN_HTTP_1_1_LENGTH &&
!memcmp(ALPN_HTTP_1_1, proto.data, ALPN_HTTP_1_1_LENGTH)) {
conn->negnpn = CURL_HTTP_VERSION_1_1;
}
}
else
infof(data, "ALPN, server did not agree to a protocol\n");
}
#endif
conn->ssl[sockindex].state = ssl_connection_complete;
conn->recv[sockindex] = gtls_recv;
conn->send[sockindex] = gtls_send;
{
/* we always unconditionally get the session id here, as even if we
already got it from the cache and asked to use it in the connection, it
might've been rejected and then a new one is in use now and we need to
detect that. */
void *connect_sessionid;
size_t connect_idsize = 0;
/* get the session ID data size */
gnutls_session_get_data(session, NULL, &connect_idsize);
connect_sessionid = malloc(connect_idsize); /* get a buffer for it */
if(connect_sessionid) {
/* extract session ID to the allocated buffer */
gnutls_session_get_data(session, connect_sessionid, &connect_idsize);
incache = !(Curl_ssl_getsessionid(conn, &ssl_sessionid, NULL));
if(incache) {
/* there was one before in the cache, so instead of risking that the
previous one was rejected, we just kill that and store the new */
Curl_ssl_delsessionid(conn, ssl_sessionid);
}
/* store this session id */
result = Curl_ssl_addsessionid(conn, connect_sessionid, connect_idsize);
if(result) {
free(connect_sessionid);
result = CURLE_OUT_OF_MEMORY;
}
}
else
result = CURLE_OUT_OF_MEMORY;
}
return result;
}
/* Verifies a certificate against an other certificate
* which is supposed to be it's issuer. Also checks the
* crl_list if the certificate is revoked.
*/
static void
verify_cert2 (gnutls_x509_crt_t crt, gnutls_x509_crt_t issuer,
gnutls_x509_crl_t * crl_list, int crl_list_size)
{
unsigned int output;
int ret;
time_t now = time (0);
size_t name_size;
char name[64];
/* Print information about the certificates to
* be checked.
*/
name_size = sizeof (name);
gnutls_x509_crt_get_dn (crt, name, &name_size);
fprintf (stderr, "\nCertificate: %s\n", name);
name_size = sizeof (name);
gnutls_x509_crt_get_issuer_dn (crt, name, &name_size);
fprintf (stderr, "Issued by: %s\n", name);
/* Get the DN of the issuer cert.
*/
name_size = sizeof (name);
gnutls_x509_crt_get_dn (issuer, name, &name_size);
fprintf (stderr, "Checking against: %s\n", name);
/* Do the actual verification.
*/
gnutls_x509_crt_verify (crt, &issuer, 1, 0, &output);
if (output & GNUTLS_CERT_INVALID)
{
fprintf (stderr, "Not trusted");
if (output & GNUTLS_CERT_SIGNER_NOT_FOUND)
fprintf (stderr, ": no issuer was found");
if (output & GNUTLS_CERT_SIGNER_NOT_CA)
fprintf (stderr, ": issuer is not a CA");
fprintf (stderr, "\n");
}
else
fprintf (stderr, "Trusted\n");
/* Now check the expiration dates.
*/
if (gnutls_x509_crt_get_activation_time (crt) > now)
fprintf (stderr, "Not yet activated\n");
if (gnutls_x509_crt_get_expiration_time (crt) < now)
fprintf (stderr, "Expired\n");
/* Check if the certificate is revoked.
*/
ret = gnutls_x509_crt_check_revocation (crt, crl_list, crl_list_size);
if (ret == 1)
{ /* revoked */
fprintf (stderr, "Revoked\n");
}
}
void VerifyCertificate(issl_session* session, StreamSocket* user)
{
if (!session->sess || !user)
return;
unsigned int status;
const gnutls_datum_t* cert_list;
int ret;
unsigned int cert_list_size;
gnutls_x509_crt_t cert;
char str[512];
unsigned char digest[512];
size_t digest_size = sizeof(digest);
size_t name_size = sizeof(str);
ssl_cert* certinfo = new ssl_cert;
session->cert = certinfo;
/* This verification function uses the trusted CAs in the credentials
* structure. So you must have installed one or more CA certificates.
*/
ret = gnutls_certificate_verify_peers2(session->sess, &status);
if (ret < 0)
{
certinfo->error = std::string(gnutls_strerror(ret));
return;
}
certinfo->invalid = (status & GNUTLS_CERT_INVALID);
certinfo->unknownsigner = (status & GNUTLS_CERT_SIGNER_NOT_FOUND);
certinfo->revoked = (status & GNUTLS_CERT_REVOKED);
certinfo->trusted = !(status & GNUTLS_CERT_SIGNER_NOT_CA);
/* Up to here the process is the same for X.509 certificates and
* OpenPGP keys. From now on X.509 certificates are assumed. This can
* be easily extended to work with openpgp keys as well.
*/
if (gnutls_certificate_type_get(session->sess) != GNUTLS_CRT_X509)
{
certinfo->error = "No X509 keys sent";
return;
}
ret = gnutls_x509_crt_init(&cert);
if (ret < 0)
{
certinfo->error = gnutls_strerror(ret);
return;
}
cert_list_size = 0;
cert_list = gnutls_certificate_get_peers(session->sess, &cert_list_size);
if (cert_list == NULL)
{
certinfo->error = "No certificate was found";
goto info_done_dealloc;
}
/* This is not a real world example, since we only check the first
* certificate in the given chain.
*/
ret = gnutls_x509_crt_import(cert, &cert_list[0], GNUTLS_X509_FMT_DER);
if (ret < 0)
{
certinfo->error = gnutls_strerror(ret);
goto info_done_dealloc;
}
gnutls_x509_crt_get_dn(cert, str, &name_size);
certinfo->dn = str;
gnutls_x509_crt_get_issuer_dn(cert, str, &name_size);
certinfo->issuer = str;
if ((ret = gnutls_x509_crt_get_fingerprint(cert, hash, digest, &digest_size)) < 0)
{
certinfo->error = gnutls_strerror(ret);
}
else
{
certinfo->fingerprint = BinToHex(digest, digest_size);
}
/* Beware here we do not check for errors.
*/
if ((gnutls_x509_crt_get_expiration_time(cert) < ServerInstance->Time()) || (gnutls_x509_crt_get_activation_time(cert) > ServerInstance->Time()))
{
certinfo->error = "Not activated, or expired certificate";
}
info_done_dealloc:
gnutls_x509_crt_deinit(cert);
}
int ssl_open(http_t *client, char *msg)
{
int ret;
char buf[256];
size_t len;
const char *sn, *err;
const gnutls_datum_t *cert_list;
unsigned int cert_list_size = 0;
gnutls_x509_crt_t cert;
if (!client->ssl_enabled)
return tcp_init(&client->tcp, msg);
/* Initialize TLS session */
logit(LOG_INFO, "%s, initiating HTTPS ...", msg);
gnutls_init(&client->ssl, GNUTLS_CLIENT);
/* SSL SNI support: tell the servername we want to speak to */
http_get_remote_name(client, &sn);
gnutls_session_set_ptr(client->ssl, (void *)sn);
if (gnutls_server_name_set(client->ssl, GNUTLS_NAME_DNS, sn, strlen(sn)))
return RC_HTTPS_SNI_ERROR;
/* Use default priorities */
ret = gnutls_priority_set_direct(client->ssl, "NORMAL", &err);
if (ret < 0) {
if (ret == GNUTLS_E_INVALID_REQUEST)
logit(LOG_ERR, "Syntax error at: %s", err);
return RC_HTTPS_INVALID_REQUEST;
}
/* put the x509 credentials to the current session */
gnutls_credentials_set(client->ssl, GNUTLS_CRD_CERTIFICATE, xcred);
/* connect to the peer */
tcp_set_port(&client->tcp, HTTPS_DEFAULT_PORT);
DO(tcp_init(&client->tcp, msg));
/* Forward TCP socket to GnuTLS, the set_int() API is perhaps too new still ... since 3.1.9 */
// gnutls_transport_set_int(client->ssl, client->tcp.ip.socket);
gnutls_transport_set_ptr(client->ssl, (gnutls_transport_ptr_t)(intptr_t)client->tcp.ip.socket);
/* Perform the TLS handshake, ignore non-fatal errors. */
do {
ret = gnutls_handshake(client->ssl);
}
while (ret != 0 && !gnutls_error_is_fatal(ret));
if (gnutls_error_is_fatal(ret)) {
logit(LOG_ERR, "SSL handshake with %s failed: %s", sn, gnutls_strerror(ret));
return RC_HTTPS_FAILED_CONNECT;
}
ssl_get_info(client);
/* Get server's certificate (note: beware of dynamic allocation) - opt */
cert_list = gnutls_certificate_get_peers(client->ssl, &cert_list_size);
if (cert_list_size > 0) {
if (gnutls_x509_crt_init(&cert))
return RC_HTTPS_FAILED_GETTING_CERT;
gnutls_x509_crt_import(cert, &cert_list[0], GNUTLS_X509_FMT_DER);
len = sizeof(buf);
gnutls_x509_crt_get_dn(cert, buf, &len);
logit(LOG_INFO, "SSL server cert subject: %s", buf);
len = sizeof(buf);
gnutls_x509_crt_get_issuer_dn(cert, buf, &len);
logit(LOG_INFO, "SSL server cert issuer: %s", buf);
gnutls_x509_crt_deinit(cert);
}
return 0;
}
int CTlsSocket::VerifyCertificate()
{
if (m_tlsState != handshake)
{
m_pOwner->LogMessage(Debug_Warning, _T("VerifyCertificate called at wrong time"));
return FZ_REPLY_ERROR;
}
m_tlsState = verifycert;
if (gnutls_certificate_type_get(m_session) != GNUTLS_CRT_X509)
{
m_pOwner->LogMessage(::Debug_Warning, _T("Unsupported certificate type"));
Failure(0);
return FZ_REPLY_ERROR;
}
unsigned int cert_list_size;
const gnutls_datum_t* const cert_list = gnutls_certificate_get_peers(m_session, &cert_list_size);
if (!cert_list || !cert_list_size)
{
m_pOwner->LogMessage(::Debug_Warning, _T("gnutls_certificate_get_peers returned no certificates"));
Failure(0);
return FZ_REPLY_ERROR;
}
if (m_implicitTrustedCert.data)
{
if (m_implicitTrustedCert.size != cert_list[0].size ||
memcmp(m_implicitTrustedCert.data, cert_list[0].data, cert_list[0].size))
{
m_pOwner->LogMessage(::Error, _("Primary connection and data connection certificates don't match."));
Failure(0);
return FZ_REPLY_ERROR;
}
TrustCurrentCert(true);
return FZ_REPLY_OK;
}
gnutls_x509_crt_t cert;
if (gnutls_x509_crt_init(&cert))
{
m_pOwner->LogMessage(::Debug_Warning, _T("gnutls_x509_crt_init failed"));
Failure(0);
return FZ_REPLY_ERROR;
}
if (gnutls_x509_crt_import(cert, cert_list, GNUTLS_X509_FMT_DER))
{
m_pOwner->LogMessage(::Debug_Warning, _T("gnutls_x509_crt_import failed"));
Failure(0);
gnutls_x509_crt_deinit(cert);
return FZ_REPLY_ERROR;
}
wxDateTime expirationTime = gnutls_x509_crt_get_expiration_time(cert);
wxDateTime activationTime = gnutls_x509_crt_get_activation_time(cert);
// Get the serial number of the certificate
unsigned char buffer[40];
size_t size = sizeof(buffer);
int res = gnutls_x509_crt_get_serial(cert, buffer, &size);
wxString serial = bin2hex(buffer, size);
unsigned int bits;
int algo = gnutls_x509_crt_get_pk_algorithm(cert, &bits);
wxString algoName;
const char* pAlgo = gnutls_pk_algorithm_get_name((gnutls_pk_algorithm_t)algo);
if (pAlgo)
algoName = wxString(pAlgo, wxConvUTF8);
//int version = gnutls_x509_crt_get_version(cert);
wxString subject, issuer;
size = 0;
res = gnutls_x509_crt_get_dn(cert, 0, &size);
if (size)
{
char* dn = new char[size + 1];
dn[size] = 0;
if (!(res = gnutls_x509_crt_get_dn(cert, dn, &size)))
{
dn[size] = 0;
subject = wxString(dn, wxConvUTF8);
}
else
LogError(res);
delete [] dn;
}
else
LogError(res);
if (subject == _T(""))
{
m_pOwner->LogMessage(::Debug_Warning, _T("gnutls_x509_get_dn failed"));
Failure(0);
gnutls_x509_crt_deinit(cert);
return FZ_REPLY_ERROR;
}
size = 0;
res = gnutls_x509_crt_get_issuer_dn(cert, 0, &size);
if (size)
{
char* dn = new char[size + 1];
dn[size] = 0;
if (!(res = gnutls_x509_crt_get_issuer_dn(cert, dn, &size)))
{
dn[size] = 0;
issuer = wxString(dn, wxConvUTF8);
}
else
LogError(res);
delete [] dn;
}
else
LogError(res);
if (issuer == _T(""))
{
m_pOwner->LogMessage(::Debug_Warning, _T("gnutls_x509_get_issuer_dn failed"));
Failure(0);
gnutls_x509_crt_deinit(cert);
return FZ_REPLY_ERROR;
}
wxString fingerprint_md5;
wxString fingerprint_sha1;
unsigned char digest[100];
size = sizeof(digest) - 1;
if (!gnutls_x509_crt_get_fingerprint(cert, GNUTLS_DIG_MD5, digest, &size))
{
digest[size] = 0;
fingerprint_md5 = bin2hex(digest, size);
}
size = sizeof(digest) - 1;
if (!gnutls_x509_crt_get_fingerprint(cert, GNUTLS_DIG_SHA1, digest, &size))
{
digest[size] = 0;
fingerprint_sha1 = bin2hex(digest, size);
}
CCertificateNotification *pNotification = new CCertificateNotification(
m_pOwner->GetCurrentServer()->GetHost(),
m_pOwner->GetCurrentServer()->GetPort(),
cert_list->data, cert_list->size,
activationTime, expirationTime,
serial,
algoName, bits,
fingerprint_md5,
fingerprint_sha1,
subject,
issuer);
pNotification->requestNumber = m_pOwner->GetEngine()->GetNextAsyncRequestNumber();
m_pOwner->GetEngine()->AddNotification(pNotification);
m_pOwner->LogMessage(Status, _("Verifying certificate..."));
return FZ_REPLY_WOULDBLOCK;
}
/*
* This function is called after the TCP connect has completed. Setup the TLS
* layer and do all necessary magic.
*/
CURLcode
Curl_gtls_connect(struct connectdata *conn,
int sockindex)
{
const int cert_type_priority[] = { GNUTLS_CRT_X509, 0 };
struct SessionHandle *data = conn->data;
gnutls_session session;
int rc;
unsigned int cert_list_size;
const gnutls_datum *chainp;
unsigned int verify_status;
gnutls_x509_crt x509_cert;
char certbuf[256]; /* big enough? */
size_t size;
unsigned int algo;
unsigned int bits;
time_t clock;
const char *ptr;
void *ssl_sessionid;
size_t ssl_idsize;
/* GnuTLS only supports TLSv1 (and SSLv3?) */
if(data->set.ssl.version == CURL_SSLVERSION_SSLv2) {
failf(data, "GnuTLS does not support SSLv2");
return CURLE_SSL_CONNECT_ERROR;
}
/* allocate a cred struct */
rc = gnutls_certificate_allocate_credentials(&conn->ssl[sockindex].cred);
if(rc < 0) {
failf(data, "gnutls_cert_all_cred() failed: %s", gnutls_strerror(rc));
return CURLE_SSL_CONNECT_ERROR;
}
if(data->set.ssl.CAfile) {
/* set the trusted CA cert bundle file */
rc = gnutls_certificate_set_x509_trust_file(conn->ssl[sockindex].cred,
data->set.ssl.CAfile,
GNUTLS_X509_FMT_PEM);
if(rc < 0) {
infof(data, "error reading ca cert file %s (%s)\n",
data->set.ssl.CAfile, gnutls_strerror(rc));
}
}
/* Initialize TLS session as a client */
rc = gnutls_init(&conn->ssl[sockindex].session, GNUTLS_CLIENT);
if(rc) {
failf(data, "gnutls_init() failed: %d", rc);
return CURLE_SSL_CONNECT_ERROR;
}
/* convenient assign */
session = conn->ssl[sockindex].session;
/* Use default priorities */
rc = gnutls_set_default_priority(session);
if(rc < 0)
return CURLE_SSL_CONNECT_ERROR;
/* Sets the priority on the certificate types supported by gnutls. Priority
is higher for types specified before others. After specifying the types
you want, you must append a 0. */
rc = gnutls_certificate_type_set_priority(session, cert_type_priority);
if(rc < 0)
return CURLE_SSL_CONNECT_ERROR;
/* put the anonymous credentials to the current session */
rc = gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE,
conn->ssl[sockindex].cred);
/* set the connection handle (file descriptor for the socket) */
gnutls_transport_set_ptr(session,
(gnutls_transport_ptr)conn->sock[sockindex]);
/* This might be a reconnect, so we check for a session ID in the cache
to speed up things */
if(!Curl_ssl_getsessionid(conn, &ssl_sessionid, &ssl_idsize)) {
/* we got a session id, use it! */
gnutls_session_set_data(session, ssl_sessionid, ssl_idsize);
/* Informational message */
infof (data, "SSL re-using session ID\n");
}
do {
rc = gnutls_handshake(session);
if((rc == GNUTLS_E_AGAIN) || (rc == GNUTLS_E_INTERRUPTED)) {
long timeout_ms;
long has_passed;
if(data->set.timeout || data->set.connecttimeout) {
/* get the most strict timeout of the ones converted to milliseconds */
if(data->set.timeout &&
(data->set.timeout>data->set.connecttimeout))
timeout_ms = data->set.timeout*1000;
else
timeout_ms = data->set.connecttimeout*1000;
}
else
timeout_ms = DEFAULT_CONNECT_TIMEOUT;
/* Evaluate in milliseconds how much time that has passed */
has_passed = Curl_tvdiff(Curl_tvnow(), data->progress.t_startsingle);
/* subtract the passed time */
timeout_ms -= has_passed;
if(timeout_ms < 0) {
/* a precaution, no need to continue if time already is up */
failf(data, "SSL connection timeout");
return CURLE_OPERATION_TIMEOUTED;
}
rc = Curl_select(conn->sock[sockindex],
conn->sock[sockindex], (int)timeout_ms);
if(rc > 0)
/* reabable or writable, go loop*/
continue;
else if(0 == rc) {
/* timeout */
failf(data, "SSL connection timeout");
return CURLE_OPERATION_TIMEDOUT;
}
else {
/* anything that gets here is fatally bad */
failf(data, "select on SSL socket, errno: %d", Curl_ourerrno());
return CURLE_SSL_CONNECT_ERROR;
}
}
else
break;
} while(1);
if (rc < 0) {
failf(data, "gnutls_handshake() failed: %d", rc);
/* gnutls_perror(ret); */
return CURLE_SSL_CONNECT_ERROR;
}
/* This function will return the peer's raw certificate (chain) as sent by
the peer. These certificates are in raw format (DER encoded for
X.509). In case of a X.509 then a certificate list may be present. The
first certificate in the list is the peer's certificate, following the
issuer's certificate, then the issuer's issuer etc. */
chainp = gnutls_certificate_get_peers(session, &cert_list_size);
if(!chainp) {
if(data->set.ssl.verifyhost) {
failf(data, "failed to get server cert");
return CURLE_SSL_PEER_CERTIFICATE;
}
infof(data, "\t common name: WARNING couldn't obtain\n");
}
/* This function will try to verify the peer's certificate and return its
status (trusted, invalid etc.). The value of status should be one or more
of the gnutls_certificate_status_t enumerated elements bitwise or'd. To
avoid denial of service attacks some default upper limits regarding the
certificate key size and chain size are set. To override them use
gnutls_certificate_set_verify_limits(). */
rc = gnutls_certificate_verify_peers2(session, &verify_status);
if (rc < 0) {
failf(data, "server cert verify failed: %d", rc);
return CURLE_SSL_CONNECT_ERROR;
}
/* verify_status is a bitmask of gnutls_certificate_status bits */
if(verify_status & GNUTLS_CERT_INVALID) {
if (data->set.ssl.verifypeer) {
failf(data, "server certificate verification failed. CAfile: %s",
data->set.ssl.CAfile?data->set.ssl.CAfile:"none");
return CURLE_SSL_CACERT;
}
else
infof(data, "\t server certificate verification FAILED\n");
}
else
infof(data, "\t server certificate verification OK\n");
/* initialize an X.509 certificate structure. */
gnutls_x509_crt_init(&x509_cert);
/* convert the given DER or PEM encoded Certificate to the native
gnutls_x509_crt_t format */
gnutls_x509_crt_import(x509_cert, chainp, GNUTLS_X509_FMT_DER);
size=sizeof(certbuf);
rc = gnutls_x509_crt_get_dn_by_oid(x509_cert, GNUTLS_OID_X520_COMMON_NAME,
0, /* the first and only one */
FALSE,
certbuf,
&size);
if(rc) {
infof(data, "error fetching CN from cert:%s\n",
gnutls_strerror(rc));
}
/* This function will check if the given certificate's subject matches the
given hostname. This is a basic implementation of the matching described
in RFC2818 (HTTPS), which takes into account wildcards, and the subject
alternative name PKIX extension. Returns non zero on success, and zero on
failure. */
rc = gnutls_x509_crt_check_hostname(x509_cert, conn->host.name);
if(!rc) {
if (data->set.ssl.verifyhost > 1) {
failf(data, "SSL: certificate subject name (%s) does not match "
"target host name '%s'", certbuf, conn->host.dispname);
gnutls_x509_crt_deinit(x509_cert);
return CURLE_SSL_PEER_CERTIFICATE;
}
else
infof(data, "\t common name: %s (does not match '%s')\n",
certbuf, conn->host.dispname);
}
else
infof(data, "\t common name: %s (matched)\n", certbuf);
/* Show:
- ciphers used
- subject
- start date
- expire date
- common name
- issuer
*/
/* public key algorithm's parameters */
algo = gnutls_x509_crt_get_pk_algorithm(x509_cert, &bits);
infof(data, "\t certificate public key: %s\n",
gnutls_pk_algorithm_get_name(algo));
/* version of the X.509 certificate. */
infof(data, "\t certificate version: #%d\n",
gnutls_x509_crt_get_version(x509_cert));
size = sizeof(certbuf);
gnutls_x509_crt_get_dn(x509_cert, certbuf, &size);
infof(data, "\t subject: %s\n", certbuf);
clock = gnutls_x509_crt_get_activation_time(x509_cert);
showtime(data, "start date", clock);
clock = gnutls_x509_crt_get_expiration_time(x509_cert);
showtime(data, "expire date", clock);
size = sizeof(certbuf);
gnutls_x509_crt_get_issuer_dn(x509_cert, certbuf, &size);
infof(data, "\t issuer: %s\n", certbuf);
gnutls_x509_crt_deinit(x509_cert);
/* compression algorithm (if any) */
ptr = gnutls_compression_get_name(gnutls_compression_get(session));
/* the *_get_name() says "NULL" if GNUTLS_COMP_NULL is returned */
infof(data, "\t compression: %s\n", ptr);
/* the name of the cipher used. ie 3DES. */
ptr = gnutls_cipher_get_name(gnutls_cipher_get(session));
infof(data, "\t cipher: %s\n", ptr);
/* the MAC algorithms name. ie SHA1 */
ptr = gnutls_mac_get_name(gnutls_mac_get(session));
infof(data, "\t MAC: %s\n", ptr);
if(!ssl_sessionid) {
/* this session was not previously in the cache, add it now */
/* get the session ID data size */
gnutls_session_get_data(session, NULL, &ssl_idsize);
ssl_sessionid = malloc(ssl_idsize); /* get a buffer for it */
if(ssl_sessionid) {
/* extract session ID to the allocated buffer */
gnutls_session_get_data(session, ssl_sessionid, &ssl_idsize);
/* store this session id */
return Curl_ssl_addsessionid(conn, ssl_sessionid, ssl_idsize);
}
}
return CURLE_OK;
}
int CTlsSocket::VerifyCertificate()
{
if (m_tlsState != handshake)
{
m_pOwner->LogMessage(::Debug_Warning, _T("VerifyCertificate called at wrong time"));
return FZ_REPLY_ERROR;
}
m_tlsState = verifycert;
if (gnutls_certificate_type_get(m_session) != GNUTLS_CRT_X509)
{
m_pOwner->LogMessage(::Error, _("Unsupported certificate type"));
Failure(0, ECONNABORTED);
return FZ_REPLY_ERROR;
}
unsigned int status = 0;
if (gnutls_certificate_verify_peers2(m_session, &status) < 0)
{
m_pOwner->LogMessage(::Error, _("Failed to verify peer certificate"));
Failure(0, ECONNABORTED);
return FZ_REPLY_ERROR;
}
if (status & GNUTLS_CERT_REVOKED)
{
m_pOwner->LogMessage(::Error, _("Beware! Certificate has been revoked"));
Failure(0, ECONNABORTED);
return FZ_REPLY_ERROR;
}
if (status & GNUTLS_CERT_SIGNER_NOT_CA)
{
m_pOwner->LogMessage(::Error, _("Incomplete chain, top certificate is not self-signed certificate authority certificate"));
Failure(0, ECONNABORTED);
return FZ_REPLY_ERROR;
}
if (m_require_root_trust && status & GNUTLS_CERT_SIGNER_NOT_FOUND)
{
m_pOwner->LogMessage(::Error, _("Root certificate is not trusted"));
Failure(0, ECONNABORTED);
return FZ_REPLY_ERROR;
}
unsigned int cert_list_size;
const gnutls_datum_t* cert_list = gnutls_certificate_get_peers(m_session, &cert_list_size);
if (!cert_list || !cert_list_size)
{
m_pOwner->LogMessage(::Error, _("gnutls_certificate_get_peers returned no certificates"));
Failure(0, ECONNABORTED);
return FZ_REPLY_ERROR;
}
if (m_implicitTrustedCert.data)
{
if (m_implicitTrustedCert.size != cert_list[0].size ||
memcmp(m_implicitTrustedCert.data, cert_list[0].data, cert_list[0].size))
{
m_pOwner->LogMessage(::Error, _("Primary connection and data connection certificates don't match."));
Failure(0, ECONNABORTED);
return FZ_REPLY_ERROR;
}
TrustCurrentCert(true);
if (m_tlsState != conn)
return FZ_REPLY_ERROR;
return FZ_REPLY_OK;
}
std::vector<CCertificate> certificates;
for (unsigned int i = 0; i < cert_list_size; i++)
{
gnutls_x509_crt_t cert;
if (gnutls_x509_crt_init(&cert))
{
m_pOwner->LogMessage(::Error, _("Could not initialize structure for peer certificates, gnutls_x509_crt_init failed"));
Failure(0, ECONNABORTED);
return FZ_REPLY_ERROR;
}
if (gnutls_x509_crt_import(cert, cert_list, GNUTLS_X509_FMT_DER))
{
m_pOwner->LogMessage(::Error, _("Could not import peer certificates, gnutls_x509_crt_import failed"));
Failure(0, ECONNABORTED);
gnutls_x509_crt_deinit(cert);
return FZ_REPLY_ERROR;
}
wxDateTime expirationTime = gnutls_x509_crt_get_expiration_time(cert);
wxDateTime activationTime = gnutls_x509_crt_get_activation_time(cert);
// Get the serial number of the certificate
unsigned char buffer[40];
size_t size = sizeof(buffer);
int res = gnutls_x509_crt_get_serial(cert, buffer, &size);
wxString serial = bin2hex(buffer, size);
unsigned int bits;
int algo = gnutls_x509_crt_get_pk_algorithm(cert, &bits);
wxString algoName;
const char* pAlgo = gnutls_pk_algorithm_get_name((gnutls_pk_algorithm_t)algo);
if (pAlgo)
algoName = wxString(pAlgo, wxConvUTF8);
//int version = gnutls_x509_crt_get_version(cert);
wxString subject, issuer;
size = 0;
res = gnutls_x509_crt_get_dn(cert, 0, &size);
if (size)
{
char* dn = new char[size + 1];
dn[size] = 0;
if (!(res = gnutls_x509_crt_get_dn(cert, dn, &size)))
{
dn[size] = 0;
subject = wxString(dn, wxConvUTF8);
}
else
LogError(res);
delete [] dn;
}
else
LogError(res);
if (subject == _T(""))
{
m_pOwner->LogMessage(::Error, _("Could not get distinguished name of certificate subject, gnutls_x509_get_dn failed"));
Failure(0, ECONNABORTED);
gnutls_x509_crt_deinit(cert);
return FZ_REPLY_ERROR;
}
size = 0;
res = gnutls_x509_crt_get_issuer_dn(cert, 0, &size);
if (size)
{
char* dn = new char[++size + 1];
dn[size] = 0;
if (!(res = gnutls_x509_crt_get_issuer_dn(cert, dn, &size)))
{
dn[size] = 0;
issuer = wxString(dn, wxConvUTF8);
}
else
LogError(res);
delete [] dn;
}
else
LogError(res);
if (issuer == _T(""))
{
m_pOwner->LogMessage(::Error, _("Could not get distinguished name of certificate issuer, gnutls_x509_get_issuer_dn failed"));
Failure(0, ECONNABORTED);
gnutls_x509_crt_deinit(cert);
return FZ_REPLY_ERROR;
}
wxString fingerprint_md5;
wxString fingerprint_sha1;
unsigned char digest[100];
size = sizeof(digest) - 1;
if (!gnutls_x509_crt_get_fingerprint(cert, GNUTLS_DIG_MD5, digest, &size))
{
digest[size] = 0;
fingerprint_md5 = bin2hex(digest, size);
}
size = sizeof(digest) - 1;
if (!gnutls_x509_crt_get_fingerprint(cert, GNUTLS_DIG_SHA1, digest, &size))
{
digest[size] = 0;
fingerprint_sha1 = bin2hex(digest, size);
}
certificates.push_back(CCertificate(
cert_list->data, cert_list->size,
activationTime, expirationTime,
serial,
algoName, bits,
fingerprint_md5,
fingerprint_sha1,
subject,
issuer));
cert_list++;
}
CCertificateNotification *pNotification = new CCertificateNotification(
m_pOwner->GetCurrentServer()->GetHost(),
m_pOwner->GetCurrentServer()->GetPort(),
GetCipherName(),
GetMacName(),
certificates);
m_pOwner->SendAsyncRequest(pNotification);
m_pOwner->LogMessage(Status, _("Verifying certificate..."));
return FZ_REPLY_WOULDBLOCK;
}
bool CTlsSocket::ExtractCert(gnutls_datum_t const* datum, CCertificate& out)
{
gnutls_x509_crt_t cert;
if (gnutls_x509_crt_init(&cert)) {
m_pOwner->LogMessage(MessageType::Error, _("Could not initialize structure for peer certificates, gnutls_x509_crt_init failed"));
return false;
}
if (gnutls_x509_crt_import(cert, datum, GNUTLS_X509_FMT_DER)) {
m_pOwner->LogMessage(MessageType::Error, _("Could not import peer certificates, gnutls_x509_crt_import failed"));
gnutls_x509_crt_deinit(cert);
return false;
}
wxDateTime expirationTime = gnutls_x509_crt_get_expiration_time(cert);
wxDateTime activationTime = gnutls_x509_crt_get_activation_time(cert);
// Get the serial number of the certificate
unsigned char buffer[40];
size_t size = sizeof(buffer);
int res = gnutls_x509_crt_get_serial(cert, buffer, &size);
if( res != 0 ) {
size = 0;
}
wxString serial = bin2hex(buffer, size);
unsigned int pkBits;
int pkAlgo = gnutls_x509_crt_get_pk_algorithm(cert, &pkBits);
wxString pkAlgoName;
if (pkAlgo >= 0) {
const char* pAlgo = gnutls_pk_algorithm_get_name((gnutls_pk_algorithm_t)pkAlgo);
if (pAlgo)
pkAlgoName = wxString(pAlgo, wxConvUTF8);
}
int signAlgo = gnutls_x509_crt_get_signature_algorithm(cert);
wxString signAlgoName;
if (signAlgo >= 0) {
const char* pAlgo = gnutls_sign_algorithm_get_name((gnutls_sign_algorithm_t)signAlgo);
if (pAlgo)
signAlgoName = wxString(pAlgo, wxConvUTF8);
}
wxString subject, issuer;
size = 0;
res = gnutls_x509_crt_get_dn(cert, 0, &size);
if (size) {
char* dn = new char[size + 1];
dn[size] = 0;
if (!(res = gnutls_x509_crt_get_dn(cert, dn, &size)))
{
dn[size] = 0;
subject = wxString(dn, wxConvUTF8);
}
else
LogError(res, _T("gnutls_x509_crt_get_dn"));
delete [] dn;
}
else
LogError(res, _T("gnutls_x509_crt_get_dn"));
if (subject.empty()) {
m_pOwner->LogMessage(MessageType::Error, _("Could not get distinguished name of certificate subject, gnutls_x509_get_dn failed"));
gnutls_x509_crt_deinit(cert);
return false;
}
std::vector<wxString> alt_subject_names = GetCertSubjectAltNames(cert);
size = 0;
res = gnutls_x509_crt_get_issuer_dn(cert, 0, &size);
if (size) {
char* dn = new char[++size + 1];
dn[size] = 0;
if (!(res = gnutls_x509_crt_get_issuer_dn(cert, dn, &size))) {
dn[size] = 0;
issuer = wxString(dn, wxConvUTF8);
}
else
LogError(res, _T("gnutls_x509_crt_get_issuer_dn"));
delete [] dn;
}
else
LogError(res, _T("gnutls_x509_crt_get_issuer_dn"));
if (issuer.empty() ) {
m_pOwner->LogMessage(MessageType::Error, _("Could not get distinguished name of certificate issuer, gnutls_x509_get_issuer_dn failed"));
gnutls_x509_crt_deinit(cert);
return false;
}
wxString fingerprint_sha256;
wxString fingerprint_sha1;
unsigned char digest[100];
size = sizeof(digest) - 1;
if (!gnutls_x509_crt_get_fingerprint(cert, GNUTLS_DIG_SHA256, digest, &size)) {
digest[size] = 0;
fingerprint_sha256 = bin2hex(digest, size);
}
size = sizeof(digest) - 1;
if (!gnutls_x509_crt_get_fingerprint(cert, GNUTLS_DIG_SHA1, digest, &size)) {
digest[size] = 0;
fingerprint_sha1 = bin2hex(digest, size);
}
gnutls_x509_crt_deinit(cert);
out = CCertificate(
datum->data, datum->size,
activationTime, expirationTime,
serial,
pkAlgoName, pkBits,
signAlgoName,
fingerprint_sha256,
fingerprint_sha1,
issuer,
subject,
alt_subject_names);
return true;
}
/* This function will print information about this session's peer
* certificate. */
static void
logcertinfo (gnutls_session_t session)
{
time_t now = time (NULL);
const gnutls_datum_t *cert_list;
unsigned cert_list_size = 0;
gnutls_x509_crt_t cert;
size_t i;
int rc;
cert_list = gnutls_certificate_get_peers (session, &cert_list_size);
if (!cert_list)
return;
rc = gnutls_x509_crt_init (&cert);
if (rc < 0)
{
syslog (LOG_ERR | LOG_DAEMON, "TLS xci failed (%d): %s",
rc, gnutls_strerror (rc));
return;
}
if (gnutls_certificate_type_get (session) == GNUTLS_CRT_X509)
for (i = 0; i < cert_list_size; i++)
{
time_t expiration_time, activation_time;
char *expiration_time_str = NULL, *activation_time_str = NULL;
unsigned char *serial = NULL, *serialhex = NULL;
char *issuer = NULL, *subject = NULL;
size_t seriallen, issuerlen, subjectlen;
unsigned char md5fingerprint[16], md5fingerprinthex[3 * 16 + 1];
size_t md5fingerprintlen;
int algo;
unsigned bits;
const char *keytype, *validity;
rc = gnutls_x509_crt_import (cert, &cert_list[i],
GNUTLS_X509_FMT_DER);
if (rc < 0)
{
syslog (LOG_ERR | LOG_DAEMON, "TLS xci[%zu] failed (%d): %s",
i, rc, gnutls_strerror (rc));
goto cleanup;
}
md5fingerprintlen = sizeof (md5fingerprint);
rc = gnutls_fingerprint (GNUTLS_DIG_MD5, &cert_list[i],
md5fingerprint, &md5fingerprintlen);
if (rc != GNUTLS_E_SUCCESS)
{
syslog (LOG_ERR | LOG_DAEMON, "TLS f[%zu] failed (%d): %s",
i, rc, gnutls_strerror (rc));
goto cleanup;
}
for (i = 0; i < md5fingerprintlen; i++)
sprintf ((char *) &md5fingerprinthex[3 * i], "%.2x:",
md5fingerprint[i]);
expiration_time = gnutls_x509_crt_get_expiration_time (cert);
if (expiration_time == (time_t) - 1)
{
syslog (LOG_ERR | LOG_DAEMON, "TLS xcget[%zu] failed (%d): %s",
i, rc, gnutls_strerror (rc));
goto cleanup;
}
activation_time = gnutls_x509_crt_get_activation_time (cert);
if (expiration_time == (time_t) - 1)
{
syslog (LOG_ERR | LOG_DAEMON, "TLS xcgat[%zu] failed (%d): %s",
i, rc, gnutls_strerror (rc));
goto cleanup;
}
expiration_time_str = xstrdup (ctime (&expiration_time));
if (expiration_time_str[strlen (expiration_time_str) - 1] == '\n')
expiration_time_str[strlen (expiration_time_str) - 1] = '\0';
activation_time_str = xstrdup (ctime (&activation_time));
if (activation_time_str[strlen (activation_time_str) - 1] == '\n')
activation_time_str[strlen (activation_time_str) - 1] = '\0';
rc = gnutls_x509_crt_get_dn (cert, NULL, &subjectlen);
if (rc != GNUTLS_E_SUCCESS && rc != GNUTLS_E_SHORT_MEMORY_BUFFER)
{
syslog (LOG_ERR | LOG_DAEMON, "TLS xcgd[%zu] failed (%d): %s",
i, rc, gnutls_strerror (rc));
goto cleanup;
}
subject = xmalloc (++subjectlen);
rc = gnutls_x509_crt_get_dn (cert, subject, &subjectlen);
if (rc != GNUTLS_E_SUCCESS)
{
syslog (LOG_ERR | LOG_DAEMON, "TLS xcgd2[%zu] failed (%d): %s",
i, rc, gnutls_strerror (rc));
goto cleanup;
}
rc = gnutls_x509_crt_get_issuer_dn (cert, NULL, &issuerlen);
if (rc != GNUTLS_E_SUCCESS && rc != GNUTLS_E_SHORT_MEMORY_BUFFER)
{
syslog (LOG_ERR | LOG_DAEMON, "TLS xcgid[%zu] failed (%d): %s",
i, rc, gnutls_strerror (rc));
goto cleanup;
}
issuer = xmalloc (++issuerlen);
rc = gnutls_x509_crt_get_issuer_dn (cert, issuer, &issuerlen);
if (rc != GNUTLS_E_SUCCESS)
{
syslog (LOG_ERR | LOG_DAEMON, "TLS xcgid2[%zu] failed (%d): %s",
i, rc, gnutls_strerror (rc));
goto cleanup;
}
seriallen = 0;
rc = gnutls_x509_crt_get_serial (cert, NULL, &seriallen);
if (rc != GNUTLS_E_SUCCESS && rc != GNUTLS_E_SHORT_MEMORY_BUFFER)
{
syslog (LOG_ERR | LOG_DAEMON, "TLS xcgs[%zu] failed (%d): %s",
i, rc, gnutls_strerror (rc));
goto cleanup;
}
serial = xmalloc (seriallen);
rc = gnutls_x509_crt_get_serial (cert, serial, &seriallen);
if (rc != GNUTLS_E_SUCCESS)
{
syslog (LOG_ERR | LOG_DAEMON, "TLS xcgs2[%zu] failed (%d): %s",
i, rc, gnutls_strerror (rc));
goto cleanup;
}
serialhex = xmalloc (2 * seriallen + 1);
for (i = 0; i < seriallen; i++)
sprintf ((char *) &serialhex[2 * i], "%.2x", serial[i]);
algo = gnutls_x509_crt_get_pk_algorithm (cert, &bits);
if (algo == GNUTLS_PK_RSA)
keytype = "RSA modulus";
else if (algo == GNUTLS_PK_DSA)
keytype = "DSA exponent";
else
keytype = "UNKNOWN";
if (expiration_time < now)
validity = "EXPIRED";
else if (activation_time > now)
validity = "NOT YET ACTIVATED";
else
validity = "valid";
/* This message can arguably belong to LOG_AUTH. */
syslog (LOG_INFO, "TLS client certificate `%s', issued by `%s', "
"serial number `%s', MD5 fingerprint `%s', activated `%s', "
"expires `%s', version #%d, key %s %d bits, currently %s",
subject, issuer, serialhex, md5fingerprinthex,
activation_time_str, expiration_time_str,
gnutls_x509_crt_get_version (cert), keytype, bits, validity);
cleanup:
free (serialhex);
free (serial);
free (expiration_time_str);
free (activation_time_str);
free (issuer);
free (subject);
}
gnutls_x509_crt_deinit (cert);
{
unsigned int status;
/* Accept default syslog facility for these errors.
* They are clearly relevant as audit traces. */
rc = gnutls_certificate_verify_peers2 (session, &status);
if (rc != GNUTLS_E_SUCCESS)
syslog (LOG_ERR, "TLS client certificate failed (%d): %s",
rc, gnutls_strerror (rc));
if (status != 0)
syslog (LOG_ERR, "TLS client certificate verify failure (%d)",
status);
}
}
/*
* This function is called after the TCP connect has completed. Setup the TLS
* layer and do all necessary magic.
*/
CURLcode
Curl_gtls_connect(struct connectdata *conn,
int sockindex)
{
static const int cert_type_priority[] = { GNUTLS_CRT_X509, 0 };
struct SessionHandle *data = conn->data;
gnutls_session session;
int rc;
unsigned int cert_list_size;
const gnutls_datum *chainp;
unsigned int verify_status;
gnutls_x509_crt x509_cert;
char certbuf[256]; /* big enough? */
size_t size;
unsigned int algo;
unsigned int bits;
time_t clock;
const char *ptr;
void *ssl_sessionid;
size_t ssl_idsize;
if (!gtls_inited) _Curl_gtls_init();
/* GnuTLS only supports TLSv1 (and SSLv3?) */
if(data->set.ssl.version == CURL_SSLVERSION_SSLv2) {
failf(data, "GnuTLS does not support SSLv2");
return CURLE_SSL_CONNECT_ERROR;
}
/* allocate a cred struct */
rc = gnutls_certificate_allocate_credentials(&conn->ssl[sockindex].cred);
if(rc < 0) {
failf(data, "gnutls_cert_all_cred() failed: %s", gnutls_strerror(rc));
return CURLE_SSL_CONNECT_ERROR;
}
if(data->set.ssl.CAfile) {
/* set the trusted CA cert bundle file */
gnutls_certificate_set_verify_flags(conn->ssl[sockindex].cred,
GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT);
rc = gnutls_certificate_set_x509_trust_file(conn->ssl[sockindex].cred,
data->set.ssl.CAfile,
GNUTLS_X509_FMT_PEM);
if(rc < 0) {
infof(data, "error reading ca cert file %s (%s)\n",
data->set.ssl.CAfile, gnutls_strerror(rc));
if (data->set.ssl.verifypeer)
return CURLE_SSL_CACERT_BADFILE;
}
else
infof(data, "found %d certificates in %s\n",
rc, data->set.ssl.CAfile);
}
/* Initialize TLS session as a client */
rc = gnutls_init(&conn->ssl[sockindex].session, GNUTLS_CLIENT);
if(rc) {
failf(data, "gnutls_init() failed: %d", rc);
return CURLE_SSL_CONNECT_ERROR;
}
/* convenient assign */
session = conn->ssl[sockindex].session;
/* Use default priorities */
rc = gnutls_set_default_priority(session);
if(rc < 0)
return CURLE_SSL_CONNECT_ERROR;
/* Sets the priority on the certificate types supported by gnutls. Priority
is higher for types specified before others. After specifying the types
you want, you must append a 0. */
rc = gnutls_certificate_type_set_priority(session, cert_type_priority);
if(rc < 0)
return CURLE_SSL_CONNECT_ERROR;
if(data->set.str[STRING_CERT]) {
if( gnutls_certificate_set_x509_key_file(
conn->ssl[sockindex].cred,
data->set.str[STRING_CERT],
data->set.str[STRING_KEY] ?
data->set.str[STRING_KEY] : data->set.str[STRING_CERT],
do_file_type(data->set.str[STRING_CERT_TYPE]) ) ) {
failf(data, "error reading X.509 key or certificate file");
return CURLE_SSL_CONNECT_ERROR;
}
}
/* put the credentials to the current session */
rc = gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE,
conn->ssl[sockindex].cred);
/* set the connection handle (file descriptor for the socket) */
gnutls_transport_set_ptr(session,
(gnutls_transport_ptr)conn->sock[sockindex]);
/* register callback functions to send and receive data. */
gnutls_transport_set_push_function(session, Curl_gtls_push);
gnutls_transport_set_pull_function(session, Curl_gtls_pull);
/* lowat must be set to zero when using custom push and pull functions. */
gnutls_transport_set_lowat(session, 0);
/* This might be a reconnect, so we check for a session ID in the cache
to speed up things */
if(!Curl_ssl_getsessionid(conn, &ssl_sessionid, &ssl_idsize)) {
/* we got a session id, use it! */
gnutls_session_set_data(session, ssl_sessionid, ssl_idsize);
/* Informational message */
infof (data, "SSL re-using session ID\n");
}
rc = handshake(conn, session, sockindex, TRUE);
if(rc)
/* handshake() sets its own error message with failf() */
return rc;
/* This function will return the peer's raw certificate (chain) as sent by
the peer. These certificates are in raw format (DER encoded for
X.509). In case of a X.509 then a certificate list may be present. The
first certificate in the list is the peer's certificate, following the
issuer's certificate, then the issuer's issuer etc. */
chainp = gnutls_certificate_get_peers(session, &cert_list_size);
if(!chainp) {
if(data->set.ssl.verifyhost) {
failf(data, "failed to get server cert");
return CURLE_PEER_FAILED_VERIFICATION;
}
infof(data, "\t common name: WARNING couldn't obtain\n");
}
/* This function will try to verify the peer's certificate and return its
status (trusted, invalid etc.). The value of status should be one or more
of the gnutls_certificate_status_t enumerated elements bitwise or'd. To
avoid denial of service attacks some default upper limits regarding the
certificate key size and chain size are set. To override them use
gnutls_certificate_set_verify_limits(). */
rc = gnutls_certificate_verify_peers2(session, &verify_status);
if (rc < 0) {
failf(data, "server cert verify failed: %d", rc);
return CURLE_SSL_CONNECT_ERROR;
}
/* verify_status is a bitmask of gnutls_certificate_status bits */
if(verify_status & GNUTLS_CERT_INVALID) {
if (data->set.ssl.verifypeer) {
failf(data, "server certificate verification failed. CAfile: %s",
data->set.ssl.CAfile?data->set.ssl.CAfile:"none");
return CURLE_SSL_CACERT;
}
else
infof(data, "\t server certificate verification FAILED\n");
}
else
infof(data, "\t server certificate verification OK\n");
/* initialize an X.509 certificate structure. */
gnutls_x509_crt_init(&x509_cert);
/* convert the given DER or PEM encoded Certificate to the native
gnutls_x509_crt_t format */
gnutls_x509_crt_import(x509_cert, chainp, GNUTLS_X509_FMT_DER);
size=sizeof(certbuf);
rc = gnutls_x509_crt_get_dn_by_oid(x509_cert, GNUTLS_OID_X520_COMMON_NAME,
0, /* the first and only one */
FALSE,
certbuf,
&size);
if(rc) {
infof(data, "error fetching CN from cert:%s\n",
gnutls_strerror(rc));
}
/* This function will check if the given certificate's subject matches the
given hostname. This is a basic implementation of the matching described
in RFC2818 (HTTPS), which takes into account wildcards, and the subject
alternative name PKIX extension. Returns non zero on success, and zero on
failure. */
rc = gnutls_x509_crt_check_hostname(x509_cert, conn->host.name);
if(!rc) {
if (data->set.ssl.verifyhost > 1) {
failf(data, "SSL: certificate subject name (%s) does not match "
"target host name '%s'", certbuf, conn->host.dispname);
gnutls_x509_crt_deinit(x509_cert);
return CURLE_PEER_FAILED_VERIFICATION;
}
else
infof(data, "\t common name: %s (does not match '%s')\n",
certbuf, conn->host.dispname);
}
else
infof(data, "\t common name: %s (matched)\n", certbuf);
/* Check for time-based validity */
clock = gnutls_x509_crt_get_expiration_time(x509_cert);
if(clock == (time_t)-1) {
failf(data, "server cert expiration date verify failed");
return CURLE_SSL_CONNECT_ERROR;
}
if(clock < time(NULL)) {
if (data->set.ssl.verifypeer) {
failf(data, "server certificate expiration date has passed.");
return CURLE_PEER_FAILED_VERIFICATION;
}
else
infof(data, "\t server certificate expiration date FAILED\n");
}
else
infof(data, "\t server certificate expiration date OK\n");
clock = gnutls_x509_crt_get_activation_time(x509_cert);
if(clock == (time_t)-1) {
failf(data, "server cert activation date verify failed");
return CURLE_SSL_CONNECT_ERROR;
}
if(clock > time(NULL)) {
if (data->set.ssl.verifypeer) {
failf(data, "server certificate not activated yet.");
return CURLE_PEER_FAILED_VERIFICATION;
}
else
infof(data, "\t server certificate activation date FAILED\n");
}
else
infof(data, "\t server certificate activation date OK\n");
/* Show:
- ciphers used
- subject
- start date
- expire date
- common name
- issuer
*/
/* public key algorithm's parameters */
algo = gnutls_x509_crt_get_pk_algorithm(x509_cert, &bits);
infof(data, "\t certificate public key: %s\n",
gnutls_pk_algorithm_get_name(algo));
/* version of the X.509 certificate. */
infof(data, "\t certificate version: #%d\n",
gnutls_x509_crt_get_version(x509_cert));
size = sizeof(certbuf);
gnutls_x509_crt_get_dn(x509_cert, certbuf, &size);
infof(data, "\t subject: %s\n", certbuf);
clock = gnutls_x509_crt_get_activation_time(x509_cert);
showtime(data, "start date", clock);
clock = gnutls_x509_crt_get_expiration_time(x509_cert);
showtime(data, "expire date", clock);
size = sizeof(certbuf);
gnutls_x509_crt_get_issuer_dn(x509_cert, certbuf, &size);
infof(data, "\t issuer: %s\n", certbuf);
gnutls_x509_crt_deinit(x509_cert);
/* compression algorithm (if any) */
ptr = gnutls_compression_get_name(gnutls_compression_get(session));
/* the *_get_name() says "NULL" if GNUTLS_COMP_NULL is returned */
infof(data, "\t compression: %s\n", ptr);
/* the name of the cipher used. ie 3DES. */
ptr = gnutls_cipher_get_name(gnutls_cipher_get(session));
infof(data, "\t cipher: %s\n", ptr);
/* the MAC algorithms name. ie SHA1 */
ptr = gnutls_mac_get_name(gnutls_mac_get(session));
infof(data, "\t MAC: %s\n", ptr);
if(!ssl_sessionid) {
/* this session was not previously in the cache, add it now */
/* get the session ID data size */
gnutls_session_get_data(session, NULL, &ssl_idsize);
ssl_sessionid = malloc(ssl_idsize); /* get a buffer for it */
if(ssl_sessionid) {
/* extract session ID to the allocated buffer */
gnutls_session_get_data(session, ssl_sessionid, &ssl_idsize);
/* store this session id */
return Curl_ssl_addsessionid(conn, ssl_sessionid, ssl_idsize);
}
}
return CURLE_OK;
}
