bool CTlsSocket::CopySessionData(const CTlsSocket* pPrimarySocket)
{
size_t session_data_size = 0;
// Get buffer size
int res = gnutls_session_get_data(pPrimarySocket->m_session, 0, &session_data_size);
if (res)
{
m_pOwner->LogMessage(Debug_Info, _T("gnutls_session_get_data on primary socket failed: %d"), res);
return false;
}
// Get session data
char *session_data = new char[session_data_size];
res = gnutls_session_get_data(pPrimarySocket->m_session, session_data, &session_data_size);
if (res)
{
delete [] session_data;
m_pOwner->LogMessage(Debug_Info, _T("gnutls_session_get_data on primary socket failed: %d"), res);
return false;
}
// Set session data
res = gnutls_session_set_data(m_session, session_data, session_data_size);
delete [] session_data;
if (res)
{
m_pOwner->LogMessage(Debug_Info, _T("gnutls_session_set_data failed: %d"), res);
return false;
}
return true;
}
int
do_handshake (gnutls_session session)
{
int ret, alert;
do
{
ret = gnutls_handshake (session);
}
while (ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN);
handshake_output = ret;
if (ret < 0 && verbose > 1)
{
if (ret == GNUTLS_E_WARNING_ALERT_RECEIVED
|| ret == GNUTLS_E_FATAL_ALERT_RECEIVED)
{
alert = gnutls_alert_get (session);
printf ("\n");
printf ("*** Received alert [%d]: %s\n",
alert, gnutls_alert_get_name (alert));
}
}
if (ret < 0)
return TEST_FAILED;
gnutls_session_get_data (session, NULL, &session_data_size);
if (sfree != 0)
{
free (session_data);
sfree = 0;
}
session_data = malloc (session_data_size);
sfree = 1;
if (session_data == NULL)
{
fprintf (stderr, "Memory error\n");
exit (1);
}
gnutls_session_get_data (session, session_data, &session_data_size);
session_id_size = sizeof (session_id);
gnutls_session_get_id (session, session_id, &session_id_size);
return TEST_SUCCEED;
}
bool CTlsSocket::CopySessionData(const CTlsSocket* pPrimarySocket)
{
size_t session_data_size = 0;
// Get buffer size
int res = gnutls_session_get_data(pPrimarySocket->m_session, 0, &session_data_size);
if (res && res != GNUTLS_E_SHORT_MEMORY_BUFFER )
{
m_pOwner->LogMessage(Debug_Warning, _T("gnutls_session_get_data on primary socket failed: %d"), res);
return true;
}
// Get session data
char *session_data = new char[session_data_size];
res = gnutls_session_get_data(pPrimarySocket->m_session, session_data, &session_data_size);
if (res)
{
delete [] session_data;
m_pOwner->LogMessage(Debug_Warning, _T("gnutls_session_get_data on primary socket failed: %d"), res);
return true;
}
// Set session data
res = gnutls_session_set_data(m_session, session_data, session_data_size );
delete [] session_data;
if (res)
{
m_pOwner->LogMessage(Debug_Info, _T("gnutls_session_set_data failed: %d. Going to reinitialize session."), res);
UninitSession();
if (!InitSession())
return false;
}
else
m_pOwner->LogMessage(Debug_Info, _T("Trying to resume existing TLS session."));
return true;
}
/*
* 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 */
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.cert) {
if( gnutls_certificate_set_x509_key_file(
conn->ssl[sockindex].cred, data->set.cert,
data->set.key != 0 ? data->set.key : data->set.cert,
do_file_type(data->set.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_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;
}
u8 * tls_connection_handshake(void *ssl_ctx, struct tls_connection *conn,
const u8 *in_data, size_t in_len,
size_t *out_len, u8 **appl_data,
size_t *appl_data_len)
{
struct tls_global *global = ssl_ctx;
u8 *out_data;
int ret;
if (appl_data)
*appl_data = NULL;
if (in_data && in_len) {
if (conn->pull_buf) {
wpa_printf(MSG_DEBUG, "%s - %d bytes remaining in "
"pull_buf", __func__, conn->pull_buf_len);
os_free(conn->pull_buf);
}
conn->pull_buf = os_malloc(in_len);
if (conn->pull_buf == NULL)
return NULL;
os_memcpy(conn->pull_buf, in_data, in_len);
conn->pull_buf_offset = conn->pull_buf;
conn->pull_buf_len = in_len;
}
ret = gnutls_handshake(conn->session);
if (ret < 0) {
switch (ret) {
case GNUTLS_E_AGAIN:
if (global->server && conn->established &&
conn->push_buf == NULL) {
/* Need to return something to trigger
* completion of EAP-TLS. */
conn->push_buf = os_malloc(1);
}
break;
case GNUTLS_E_FATAL_ALERT_RECEIVED:
wpa_printf(MSG_DEBUG, "%s - received fatal '%s' alert",
__func__, gnutls_alert_get_name(
gnutls_alert_get(conn->session)));
conn->read_alerts++;
/* continue */
default:
wpa_printf(MSG_DEBUG, "%s - gnutls_handshake failed "
"-> %s", __func__, gnutls_strerror(ret));
conn->failed++;
}
} else {
size_t size;
if (conn->verify_peer && tls_connection_verify_peer(conn)) {
wpa_printf(MSG_INFO, "TLS: Peer certificate chain "
"failed validation");
conn->failed++;
return NULL;
}
if (conn->tls_ia && !gnutls_ia_handshake_p(conn->session)) {
wpa_printf(MSG_INFO, "TLS: No TLS/IA negotiation");
conn->failed++;
return NULL;
}
if (conn->tls_ia)
wpa_printf(MSG_DEBUG, "TLS: Start TLS/IA handshake");
else {
wpa_printf(MSG_DEBUG, "TLS: Handshake completed "
"successfully");
}
conn->established = 1;
if (conn->push_buf == NULL) {
/* Need to return something to get final TLS ACK. */
conn->push_buf = os_malloc(1);
}
gnutls_session_get_data(conn->session, NULL, &size);
if (global->session_data == NULL ||
global->session_data_size < size) {
os_free(global->session_data);
global->session_data = os_malloc(size);
}
if (global->session_data) {
global->session_data_size = size;
gnutls_session_get_data(conn->session,
global->session_data,
&global->session_data_size);
}
}
out_data = conn->push_buf;
*out_len = conn->push_buf_len;
conn->push_buf = NULL;
conn->push_buf_len = 0;
return out_data;
}
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) {
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;
}
int
main (int argc, char **argv)
{
int err, ret;
int ii, i;
char buffer[MAX_BUF + 1];
char *session_data = NULL;
char *session_id = NULL;
size_t session_data_size;
size_t session_id_size;
fd_set rset;
int maxfd;
struct timeval tv;
int user_term = 0, retval = 0;
socket_st hd;
ssize_t bytes;
set_program_name (argv[0]);
gcry_control (GCRYCTL_ENABLE_QUICK_RANDOM, 0);
#ifdef gcry_fips_mode_active
/* Libgcrypt manual says that gcry_version_check must be called
before calling gcry_fips_mode_active. */
gcry_check_version (NULL);
if (gcry_fips_mode_active ())
{
ret = gnutls_register_md5_handler ();
if (ret)
fprintf (stderr, "gnutls_register_md5_handler: %s\n",
gnutls_strerror (ret));
}
#endif
if ((ret = gnutls_global_init ()) < 0)
{
fprintf (stderr, "global_init: %s\n", gnutls_strerror (ret));
exit (1);
}
if ((ret = gnutls_global_init_extra ()) < 0)
{
fprintf (stderr, "global_init_extra: %s\n", gnutls_strerror (ret));
exit (1);
}
gaa_parser (argc, argv);
if (hostname == NULL)
{
fprintf (stderr, "No hostname given\n");
exit (1);
}
gnutls_global_set_log_function (tls_log_func);
gnutls_global_set_log_level (info.debug);
sockets_init ();
#ifndef _WIN32
signal (SIGPIPE, SIG_IGN);
#endif
init_global_tls_stuff ();
socket_open (&hd, hostname, service);
socket_connect (&hd);
hd.session = init_tls_session (hostname);
if (starttls)
goto after_handshake;
for (i = 0; i < 2; i++)
{
if (i == 1)
{
hd.session = init_tls_session (hostname);
gnutls_session_set_data (hd.session, session_data,
session_data_size);
free (session_data);
}
ret = do_handshake (&hd);
if (ret < 0)
{
fprintf (stderr, "*** Handshake has failed\n");
gnutls_perror (ret);
gnutls_deinit (hd.session);
return 1;
}
else
{
printf ("- Handshake was completed\n");
if (gnutls_session_is_resumed (hd.session) != 0)
printf ("*** This is a resumed session\n");
}
if (resume != 0 && i == 0)
{
gnutls_session_get_data (hd.session, NULL, &session_data_size);
session_data = malloc (session_data_size);
gnutls_session_get_data (hd.session, session_data,
&session_data_size);
gnutls_session_get_id (hd.session, NULL, &session_id_size);
session_id = malloc (session_id_size);
gnutls_session_get_id (hd.session, session_id, &session_id_size);
/* print some information */
print_info (hd.session, hostname, info.insecure);
printf ("- Disconnecting\n");
socket_bye (&hd);
printf
("\n\n- Connecting again- trying to resume previous session\n");
socket_open (&hd, hostname, service);
socket_connect (&hd);
}
else
{
break;
}
}
after_handshake:
/* Warning! Do not touch this text string, it is used by external
programs to search for when gnutls-cli has reached this point. */
printf ("\n- Simple Client Mode:\n\n");
if (rehandshake)
{
ret = do_handshake (&hd);
if (ret < 0)
{
fprintf (stderr, "*** ReHandshake has failed\n");
gnutls_perror (ret);
gnutls_deinit (hd.session);
return 1;
}
else
{
printf ("- ReHandshake was completed\n");
}
}
#ifndef _WIN32
signal (SIGALRM, &starttls_alarm);
#endif
fflush(stdout);
fflush(stderr);
/* do not buffer */
#if !(defined _WIN32 || defined __WIN32__)
setbuf (stdin, NULL);
#endif
setbuf (stdout, NULL);
setbuf (stderr, NULL);
for (;;)
{
if (starttls_alarmed && !hd.secure)
{
/* Warning! Do not touch this text string, it is used by
external programs to search for when gnutls-cli has
reached this point. */
fprintf (stderr, "*** Starting TLS handshake\n");
ret = do_handshake (&hd);
if (ret < 0)
{
fprintf (stderr, "*** Handshake has failed\n");
user_term = 1;
retval = 1;
break;
}
}
FD_ZERO (&rset);
FD_SET (fileno (stdin), &rset);
FD_SET (hd.fd, &rset);
maxfd = MAX (fileno (stdin), hd.fd);
tv.tv_sec = 3;
tv.tv_usec = 0;
err = select (maxfd + 1, &rset, NULL, NULL, &tv);
if (err < 0)
continue;
if (FD_ISSET (hd.fd, &rset))
{
memset (buffer, 0, MAX_BUF + 1);
ret = socket_recv (&hd, buffer, MAX_BUF);
if (ret == 0)
{
printf ("- Peer has closed the GnuTLS connection\n");
break;
}
else if (handle_error (&hd, ret) < 0 && user_term == 0)
{
fprintf (stderr,
"*** Server has terminated the connection abnormally.\n");
retval = 1;
break;
}
else if (ret > 0)
{
if (verbose != 0)
printf ("- Received[%d]: ", ret);
for (ii = 0; ii < ret; ii++)
{
fputc (buffer[ii], stdout);
}
fflush (stdout);
}
if (user_term != 0)
break;
}
if (FD_ISSET (fileno (stdin), &rset))
{
if ((bytes = read (fileno (stdin), buffer, MAX_BUF - 1)) <= 0)
{
if (hd.secure == 0)
{
/* Warning! Do not touch this text string, it is
used by external programs to search for when
gnutls-cli has reached this point. */
fprintf (stderr, "*** Starting TLS handshake\n");
ret = do_handshake (&hd);
clearerr (stdin);
if (ret < 0)
{
fprintf (stderr, "*** Handshake has failed\n");
user_term = 1;
retval = 1;
break;
}
}
else
{
user_term = 1;
break;
}
continue;
}
if (crlf != 0)
{
char *b = strchr (buffer, '\n');
if (b != NULL)
{
strcpy (b, "\r\n");
bytes++;
}
}
ret = socket_send (&hd, buffer, bytes);
if (ret > 0)
{
if (verbose != 0)
printf ("- Sent: %d bytes\n", ret);
}
else
handle_error (&hd, ret);
}
}
if (info.debug)
gcry_control (GCRYCTL_DUMP_RANDOM_STATS);
if (user_term != 0)
socket_bye (&hd);
else
gnutls_deinit (hd.session);
#ifdef ENABLE_SRP
if (srp_cred)
gnutls_srp_free_client_credentials (srp_cred);
#endif
#ifdef ENABLE_PSK
if (psk_cred)
gnutls_psk_free_client_credentials (psk_cred);
#endif
gnutls_certificate_free_credentials (xcred);
#ifdef ENABLE_ANON
gnutls_anon_free_client_credentials (anon_cred);
#endif
gnutls_global_deinit ();
return retval;
}
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;
}
int
main (int argc, char **argv)
{
int ret;
int ii, i, inp;
char buffer[MAX_BUF + 1];
char *session_data = NULL;
char *session_id = NULL;
size_t session_data_size;
size_t session_id_size = 0;
int user_term = 0, retval = 0;
socket_st hd;
ssize_t bytes;
set_program_name (argv[0]);
gaa_parser (argc, argv);
gnutls_global_set_log_function (tls_log_func);
gnutls_global_set_log_level (info.debug);
if ((ret = gnutls_global_init ()) < 0)
{
fprintf (stderr, "global_init: %s\n", gnutls_strerror (ret));
exit (1);
}
#ifdef ENABLE_PKCS11
pkcs11_common ();
#endif
if (hostname == NULL)
{
fprintf (stderr, "No hostname given\n");
exit (1);
}
sockets_init ();
#ifndef _WIN32
signal (SIGPIPE, SIG_IGN);
#endif
init_global_tls_stuff ();
socket_open (&hd, hostname, service);
socket_connect (&hd);
hd.session = init_tls_session (hostname);
if (starttls)
goto after_handshake;
for (i = 0; i < 2; i++)
{
if (i == 1)
{
hd.session = init_tls_session (hostname);
gnutls_session_set_data (hd.session, session_data,
session_data_size);
free (session_data);
}
ret = do_handshake (&hd);
if (ret < 0)
{
fprintf (stderr, "*** Handshake has failed\n");
gnutls_perror (ret);
gnutls_deinit (hd.session);
return 1;
}
else
{
printf ("- Handshake was completed\n");
if (gnutls_session_is_resumed (hd.session) != 0)
printf ("*** This is a resumed session\n");
}
if (resume != 0 && i == 0)
{
gnutls_session_get_data (hd.session, NULL, &session_data_size);
session_data = malloc (session_data_size);
gnutls_session_get_data (hd.session, session_data,
&session_data_size);
gnutls_session_get_id (hd.session, NULL, &session_id_size);
session_id = malloc (session_id_size);
gnutls_session_get_id (hd.session, session_id, &session_id_size);
/* print some information */
print_info (hd.session, hostname, info.insecure);
printf ("- Disconnecting\n");
socket_bye (&hd);
printf
("\n\n- Connecting again- trying to resume previous session\n");
socket_open (&hd, hostname, service);
socket_connect (&hd);
}
else
{
break;
}
}
after_handshake:
/* Warning! Do not touch this text string, it is used by external
programs to search for when gnutls-cli has reached this point. */
printf ("\n- Simple Client Mode:\n\n");
if (rehandshake)
{
ret = do_handshake (&hd);
if (ret < 0)
{
fprintf (stderr, "*** ReHandshake has failed\n");
gnutls_perror (ret);
gnutls_deinit (hd.session);
return 1;
}
else
{
printf ("- ReHandshake was completed\n");
}
}
#ifndef _WIN32
signal (SIGALRM, &starttls_alarm);
#endif
fflush (stdout);
fflush (stderr);
/* do not buffer */
#if !(defined _WIN32 || defined __WIN32__)
setbuf (stdin, NULL);
#endif
setbuf (stdout, NULL);
setbuf (stderr, NULL);
for (;;)
{
if (starttls_alarmed && !hd.secure)
{
/* Warning! Do not touch this text string, it is used by
external programs to search for when gnutls-cli has
reached this point. */
fprintf (stderr, "*** Starting TLS handshake\n");
ret = do_handshake (&hd);
if (ret < 0)
{
fprintf (stderr, "*** Handshake has failed\n");
user_term = 1;
retval = 1;
break;
}
}
inp = check_net_or_keyboard_input(&hd);
if (inp == IN_NET)
{
memset (buffer, 0, MAX_BUF + 1);
ret = socket_recv (&hd, buffer, MAX_BUF);
if (ret == 0)
{
printf ("- Peer has closed the GnuTLS connection\n");
break;
}
else if (handle_error (&hd, ret) < 0 && user_term == 0)
{
fprintf (stderr,
"*** Server has terminated the connection abnormally.\n");
retval = 1;
break;
}
else if (ret > 0)
{
if (verbose != 0)
printf ("- Received[%d]: ", ret);
for (ii = 0; ii < ret; ii++)
{
fputc (buffer[ii], stdout);
}
fflush (stdout);
}
if (user_term != 0)
break;
}
if (inp == IN_KEYBOARD)
{
if ((bytes = read (fileno (stdin), buffer, MAX_BUF - 1)) <= 0)
{
if (hd.secure == 0)
{
/* Warning! Do not touch this text string, it is
used by external programs to search for when
gnutls-cli has reached this point. */
fprintf (stderr, "*** Starting TLS handshake\n");
ret = do_handshake (&hd);
clearerr (stdin);
if (ret < 0)
{
fprintf (stderr, "*** Handshake has failed\n");
user_term = 1;
retval = 1;
break;
}
}
else
{
user_term = 1;
break;
}
continue;
}
buffer[bytes] = 0;
if (crlf != 0)
{
char *b = strchr (buffer, '\n');
if (b != NULL)
{
strcpy (b, "\r\n");
bytes++;
}
}
ret = socket_send (&hd, buffer, bytes);
if (ret > 0)
{
if (verbose != 0)
printf ("- Sent: %d bytes\n", ret);
}
else
handle_error (&hd, ret);
}
}
if (user_term != 0)
socket_bye (&hd);
else
gnutls_deinit (hd.session);
#ifdef ENABLE_SRP
if (srp_cred)
gnutls_srp_free_client_credentials (srp_cred);
#endif
#ifdef ENABLE_PSK
if (psk_cred)
gnutls_psk_free_client_credentials (psk_cred);
#endif
gnutls_certificate_free_credentials (xcred);
#ifdef ENABLE_ANON
gnutls_anon_free_client_credentials (anon_cred);
#endif
gnutls_global_deinit ();
return retval;
}
int
main (int argc, char **argv)
{
int err, ret;
int ii, i;
char buffer[MAX_BUF + 1];
char *session_data = NULL;
char *session_id = NULL;
size_t session_data_size;
size_t session_id_size;
fd_set rset;
int maxfd;
struct timeval tv;
int user_term = 0;
socket_st hd;
gaa_parser (argc, argv);
if (hostname == NULL)
{
fprintf (stderr, "No hostname given\n");
exit (1);
}
sockets_init ();
#ifndef _WIN32
signal (SIGPIPE, SIG_IGN);
#endif
init_global_tls_stuff ();
socket_open( &hd, hostname, service);
socket_connect( &hd);
hd.session = init_tls_session (hostname);
if (starttls)
goto after_handshake;
for (i = 0; i < 2; i++)
{
if (i == 1)
{
hd.session = init_tls_session (hostname);
gnutls_session_set_data (hd.session, session_data,
session_data_size);
free (session_data);
}
ret = do_handshake (&hd);
if (ret < 0)
{
fprintf (stderr, "*** Handshake has failed\n");
gnutls_perror (ret);
gnutls_deinit (hd.session);
return 1;
}
else
{
printf ("- Handshake was completed\n");
if (gnutls_session_is_resumed (hd.session) != 0)
printf ("*** This is a resumed session\n");
}
if (resume != 0 && i == 0)
{
gnutls_session_get_data (hd.session, NULL, &session_data_size);
session_data = malloc (session_data_size);
gnutls_session_get_data (hd.session, session_data,
&session_data_size);
gnutls_session_get_id (hd.session, NULL, &session_id_size);
session_id = malloc (session_id_size);
gnutls_session_get_id (hd.session, session_id, &session_id_size);
/* print some information */
print_info (hd.session, hostname);
printf ("- Disconnecting\n");
socket_bye (&hd);
printf
("\n\n- Connecting again- trying to resume previous session\n");
socket_open( &hd, hostname, service);
socket_connect(&hd);
}
else
{
break;
}
}
after_handshake:
printf ("\n- Simple Client Mode:\n\n");
#ifndef _WIN32
signal (SIGALRM, &starttls_alarm);
#endif
/* do not buffer */
#if !(defined _WIN32 || defined __WIN32__)
setbuf (stdin, NULL);
#endif
setbuf (stdout, NULL);
setbuf (stderr, NULL);
for (;;)
{
if (starttls_alarmed && !hd.secure)
{
fprintf (stderr, "*** Starting TLS handshake\n");
ret = do_handshake (&hd);
if (ret < 0)
{
fprintf (stderr, "*** Handshake has failed\n");
socket_bye (&hd);
user_term = 1;
break;
}
}
FD_ZERO (&rset);
FD_SET (fileno (stdin), &rset);
FD_SET (hd.fd, &rset);
maxfd = MAX (fileno (stdin), hd.fd);
tv.tv_sec = 3;
tv.tv_usec = 0;
err = select (maxfd + 1, &rset, NULL, NULL, &tv);
if (err < 0)
continue;
if (FD_ISSET (hd.fd, &rset))
{
memset (buffer, 0, MAX_BUF + 1);
ret = socket_recv (&hd, buffer, MAX_BUF);
if (ret == 0)
{
printf ("- Peer has closed the GNUTLS connection\n");
break;
}
else if (handle_error (&hd, ret) < 0 && user_term == 0)
{
fprintf (stderr,
"*** Server has terminated the connection abnormally.\n");
break;
}
else if (ret > 0)
{
if (verbose != 0)
printf ("- Received[%d]: ", ret);
for (ii = 0; ii < ret; ii++)
{
fputc (buffer[ii], stdout);
}
fflush (stdout);
}
if (user_term != 0)
break;
}
if (FD_ISSET (fileno (stdin), &rset))
{
if (fgets (buffer, MAX_BUF, stdin) == NULL)
{
if (hd.secure == 0)
{
fprintf (stderr, "*** Starting TLS handshake\n");
ret = do_handshake (&hd);
if (ret < 0)
{
fprintf (stderr, "*** Handshake has failed\n");
socket_bye (&hd);
user_term = 1;
}
}
else
{
user_term = 1;
break;
}
continue;
}
if (crlf != 0)
{
char *b = strchr (buffer, '\n');
if (b != NULL)
strcpy (b, "\r\n");
}
ret = socket_send (&hd, buffer, strlen (buffer));
if (ret > 0)
{
if (verbose != 0)
printf ("- Sent: %d bytes\n", ret);
}
else
handle_error (&hd, ret);
}
}
if (user_term != 0)
socket_bye (&hd);
else
gnutls_deinit (hd.session);
#ifdef ENABLE_SRP
gnutls_srp_free_client_credentials (srp_cred);
#endif
#ifdef ENABLE_PSK
gnutls_psk_free_client_credentials (psk_cred);
#endif
gnutls_certificate_free_credentials (xcred);
#ifdef ENABLE_ANON
gnutls_anon_free_client_credentials (anon_cred);
#endif
gnutls_global_deinit ();
return 0;
}
struct wpabuf * tls_connection_handshake(void *tls_ctx,
struct tls_connection *conn,
const struct wpabuf *in_data,
struct wpabuf **appl_data)
{
struct tls_global *global = tls_ctx;
struct wpabuf *out_data;
int ret;
if (appl_data)
*appl_data = NULL;
if (in_data && wpabuf_len(in_data) > 0) {
if (conn->pull_buf) {
wpa_printf(MSG_DEBUG, "%s - %lu bytes remaining in "
"pull_buf", __func__,
(unsigned long) wpabuf_len(conn->pull_buf));
wpabuf_free(conn->pull_buf);
}
conn->pull_buf = wpabuf_dup(in_data);
if (conn->pull_buf == NULL)
return NULL;
conn->pull_buf_offset = wpabuf_head(conn->pull_buf);
}
ret = gnutls_handshake(conn->session);
if (ret < 0) {
switch (ret) {
case GNUTLS_E_AGAIN:
if (global->server && conn->established &&
conn->push_buf == NULL) {
/* Need to return something to trigger
* completion of EAP-TLS. */
conn->push_buf = wpabuf_alloc(0);
}
break;
case GNUTLS_E_FATAL_ALERT_RECEIVED:
wpa_printf(MSG_DEBUG, "%s - received fatal '%s' alert",
__func__, gnutls_alert_get_name(
gnutls_alert_get(conn->session)));
conn->read_alerts++;
/* continue */
default:
wpa_printf(MSG_DEBUG, "%s - gnutls_handshake failed "
"-> %s", __func__, gnutls_strerror(ret));
conn->failed++;
}
} else {
size_t size;
gnutls_alert_description_t err;
if (conn->verify_peer &&
tls_connection_verify_peer(conn, &err)) {
wpa_printf(MSG_INFO, "TLS: Peer certificate chain "
"failed validation");
conn->failed++;
gnutls_alert_send(conn->session, GNUTLS_AL_FATAL, err);
goto out;
}
wpa_printf(MSG_DEBUG, "TLS: Handshake completed successfully");
conn->established = 1;
if (conn->push_buf == NULL) {
/* Need to return something to get final TLS ACK. */
conn->push_buf = wpabuf_alloc(0);
}
gnutls_session_get_data(conn->session, NULL, &size);
if (global->session_data == NULL ||
global->session_data_size < size) {
os_free(global->session_data);
global->session_data = os_malloc(size);
}
if (global->session_data) {
global->session_data_size = size;
gnutls_session_get_data(conn->session,
global->session_data,
&global->session_data_size);
}
if (conn->pull_buf && appl_data)
*appl_data = gnutls_get_appl_data(conn);
}
out:
out_data = conn->push_buf;
conn->push_buf = NULL;
return out_data;
}
int ne_sock_connect_ssl(ne_socket *sock, ne_ssl_context *ctx, void *userdata)
{
int ret;
#if defined(HAVE_OPENSSL)
SSL *ssl;
if (seed_ssl_prng()) {
set_error(sock, _("SSL disabled due to lack of entropy"));
return NE_SOCK_ERROR;
}
/* If runtime library version differs from compile-time version
* number in major/minor/fix level, abort soon. */
if ((SSLeay() ^ OPENSSL_VERSION_NUMBER) & 0xFFFFF000) {
set_error(sock, _("SSL disabled due to library version mismatch"));
return NE_SOCK_ERROR;
}
sock->ssl = ssl = SSL_new(ctx->ctx);
if (!ssl) {
set_error(sock, _("Could not create SSL structure"));
return NE_SOCK_ERROR;
}
SSL_set_app_data(ssl, userdata);
SSL_set_mode(ssl, SSL_MODE_AUTO_RETRY);
SSL_set_fd(ssl, sock->fd);
sock->ops = &iofns_ssl;
if (ctx->sess)
SSL_set_session(ssl, ctx->sess);
ret = SSL_connect(ssl);
if (ret != 1) {
error_ossl(sock, ret);
SSL_free(ssl);
sock->ssl = NULL;
return NE_SOCK_ERROR;
}
#elif defined(HAVE_GNUTLS)
/* DH and RSA params are set in ne_ssl_context_create */
gnutls_init(&sock->ssl, GNUTLS_CLIENT);
gnutls_set_default_priority(sock->ssl);
gnutls_session_set_ptr(sock->ssl, userdata);
gnutls_credentials_set(sock->ssl, GNUTLS_CRD_CERTIFICATE, ctx->cred);
gnutls_transport_set_ptr(sock->ssl, (gnutls_transport_ptr) sock->fd);
if (ctx->cache.client.data) {
#if defined(HAVE_GNUTLS_SESSION_GET_DATA2)
gnutls_session_set_data(sock->ssl,
ctx->cache.client.data,
ctx->cache.client.size);
#else
gnutls_session_set_data(sock->ssl,
ctx->cache.client.data,
ctx->cache.client.len);
#endif
}
sock->ops = &iofns_ssl;
ret = gnutls_handshake(sock->ssl);
if (ret < 0) {
error_gnutls(sock, ret);
return NE_SOCK_ERROR;
}
if (!gnutls_session_is_resumed(sock->ssl)) {
/* New session. The old method of using the _get_data
* function seems to be broken with 1.3.0 and later*/
#if defined(HAVE_GNUTLS_SESSION_GET_DATA2)
gnutls_session_get_data2(sock->ssl, &ctx->cache.client);
#else
ctx->cache.client.len = 0;
if (gnutls_session_get_data(sock->ssl, NULL,
&ctx->cache.client.len) == 0) {
ctx->cache.client.data = ne_malloc(ctx->cache.client.len);
gnutls_session_get_data(sock->ssl, ctx->cache.client.data,
&ctx->cache.client.len);
}
#endif
}
#endif
return 0;
}
int
main (void)
{
int ret;
int sd, ii;
gnutls_session_t session;
char buffer[MAX_BUF + 1];
gnutls_certificate_credentials_t xcred;
/* variables used in session resuming
*/
int t;
char *session_data = NULL;
size_t session_data_size = 0;
gnutls_global_init ();
/* X509 stuff */
gnutls_certificate_allocate_credentials (&xcred);
gnutls_certificate_set_x509_trust_file (xcred, CAFILE, GNUTLS_X509_FMT_PEM);
for (t = 0; t < 2; t++)
{ /* connect 2 times to the server */
sd = tcp_connect ();
gnutls_init (&session, GNUTLS_CLIENT);
gnutls_priority_set_direct (session, "PERFORMANCE:!ARCFOUR-128", NULL);
gnutls_credentials_set (session, GNUTLS_CRD_CERTIFICATE, xcred);
if (t > 0)
{
/* if this is not the first time we connect */
gnutls_session_set_data (session, session_data, session_data_size);
free (session_data);
}
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) sd);
/* Perform the TLS handshake
*/
ret = gnutls_handshake (session);
if (ret < 0)
{
fprintf (stderr, "*** Handshake failed\n");
gnutls_perror (ret);
goto end;
}
else
{
printf ("- Handshake was completed\n");
}
if (t == 0)
{ /* the first time we connect */
/* get the session data size */
gnutls_session_get_data (session, NULL, &session_data_size);
session_data = malloc (session_data_size);
/* put session data to the session variable */
gnutls_session_get_data (session, session_data, &session_data_size);
}
else
{ /* the second time we connect */
/* check if we actually resumed the previous session */
if (gnutls_session_is_resumed (session) != 0)
{
printf ("- Previous session was resumed\n");
}
else
{
fprintf (stderr, "*** Previous session was NOT resumed\n");
}
}
/* This function was defined in a previous example
*/
/* print_info(session); */
gnutls_record_send (session, MSG, strlen (MSG));
ret = gnutls_record_recv (session, buffer, MAX_BUF);
if (ret == 0)
{
printf ("- Peer has closed the TLS connection\n");
goto end;
}
else if (ret < 0)
{
fprintf (stderr, "*** Error: %s\n", gnutls_strerror (ret));
goto end;
}
printf ("- Received %d bytes: ", ret);
for (ii = 0; ii < ret; ii++)
{
fputc (buffer[ii], stdout);
}
fputs ("\n", stdout);
gnutls_bye (session, GNUTLS_SHUT_RDWR);
end:
tcp_close (sd);
gnutls_deinit (session);
} /* for() */
gnutls_certificate_free_credentials (xcred);
gnutls_global_deinit ();
return 0;
}
struct wpabuf * tls_connection_handshake(void *tls_ctx,
struct tls_connection *conn,
const struct wpabuf *in_data,
struct wpabuf **appl_data)
{
struct tls_global *global = tls_ctx;
struct wpabuf *out_data;
int ret;
if (appl_data)
*appl_data = NULL;
if (in_data && wpabuf_len(in_data) > 0) {
if (conn->pull_buf) {
wpa_printf(MSG_DEBUG, "%s - %lu bytes remaining in "
"pull_buf", __func__,
(unsigned long) wpabuf_len(conn->pull_buf));
wpabuf_free(conn->pull_buf);
}
conn->pull_buf = wpabuf_dup(in_data);
if (conn->pull_buf == NULL)
return NULL;
conn->pull_buf_offset = wpabuf_head(conn->pull_buf);
}
ret = gnutls_handshake(conn->session);
if (ret < 0) {
gnutls_alert_description_t alert;
switch (ret) {
case GNUTLS_E_AGAIN:
if (global->server && conn->established &&
conn->push_buf == NULL) {
/* Need to return something to trigger
* completion of EAP-TLS. */
conn->push_buf = wpabuf_alloc(0);
}
break;
case GNUTLS_E_FATAL_ALERT_RECEIVED:
alert = gnutls_alert_get(conn->session);
wpa_printf(MSG_DEBUG, "%s - received fatal '%s' alert",
__func__, gnutls_alert_get_name(alert));
conn->read_alerts++;
if (conn->global->event_cb != NULL) {
union tls_event_data ev;
os_memset(&ev, 0, sizeof(ev));
ev.alert.is_local = 0;
ev.alert.type = gnutls_alert_get_name(alert);
ev.alert.description = ev.alert.type;
conn->global->event_cb(conn->global->cb_ctx,
TLS_ALERT, &ev);
}
/* continue */
default:
wpa_printf(MSG_DEBUG, "%s - gnutls_handshake failed "
"-> %s", __func__, gnutls_strerror(ret));
conn->failed++;
}
} else {
size_t size;
wpa_printf(MSG_DEBUG, "TLS: Handshake completed successfully");
#if GNUTLS_VERSION_NUMBER >= 0x03010a
{
char *desc;
desc = gnutls_session_get_desc(conn->session);
if (desc) {
wpa_printf(MSG_DEBUG, "GnuTLS: %s", desc);
gnutls_free(desc);
}
}
#endif /* GnuTLS 3.1.10 or newer */
conn->established = 1;
if (conn->push_buf == NULL) {
/* Need to return something to get final TLS ACK. */
conn->push_buf = wpabuf_alloc(0);
}
gnutls_session_get_data(conn->session, NULL, &size);
if (global->session_data == NULL ||
global->session_data_size < size) {
os_free(global->session_data);
global->session_data = os_malloc(size);
}
if (global->session_data) {
global->session_data_size = size;
gnutls_session_get_data(conn->session,
global->session_data,
&global->session_data_size);
}
if (conn->pull_buf && appl_data)
*appl_data = gnutls_get_appl_data(conn);
}
out_data = conn->push_buf;
conn->push_buf = NULL;
return out_data;
}
int
connect_ssl(char *host, char *port,
int reconnect,
int use_sessionid, int use_ticket,
int delay,
const char *client_cert,
const char *client_key) {
struct addrinfo* addr;
int err, s;
char buffer[256];
gnutls_anon_client_credentials_t anoncred;
gnutls_certificate_credentials_t xcred;
gnutls_session_t session;
char *session_data = NULL;
size_t session_data_size = 0;
char *session_id = NULL;
size_t session_id_size = 0;
char *session_id_hex = NULL;
char *session_id_p = NULL;
unsigned session_id_idx;
const char *hex = "0123456789ABCDEF";
start("Initialize GNU TLS library");
if ((err = gnutls_global_init()))
fail("Unable to initialize GNU TLS:\n%s",
gnutls_strerror(err));
if ((err = gnutls_anon_allocate_client_credentials(&anoncred)))
fail("Unable to allocate anonymous client credentials:\n%s",
gnutls_strerror(err));
if ((err = gnutls_certificate_allocate_credentials(&xcred)))
fail("Unable to allocate X509 credentials:\n%s",
gnutls_strerror(err));
#ifdef DEBUG
gnutls_global_set_log_function(debug);
gnutls_global_set_log_level(10);
#endif
addr = solve(host, port);
do {
start("Initialize TLS session");
if ((err = gnutls_init(&session, GNUTLS_CLIENT)))
fail("Unable to initialize the current session:\n%s",
gnutls_strerror(err));
if ((err = gnutls_priority_set_direct(session, "PERFORMANCE:NORMAL:EXPORT", NULL)))
fail("Unable to initialize cipher suites:\n%s",
gnutls_strerror(err));
gnutls_dh_set_prime_bits(session, 512);
if (client_cert == NULL) {
if ((err = gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred)))
fail("Unable to set anonymous credentials for session:\n%s",
gnutls_strerror(err));
} else {
if ((err = gnutls_certificate_set_x509_key_file(xcred, client_cert, client_key, GNUTLS_X509_FMT_PEM))) {
fail("failed to load x509 certificate from file %s or key from %s: %s",client_cert,client_key,gnutls_strerror(err));
}
}
if ((err = gnutls_credentials_set (session, GNUTLS_CRD_CERTIFICATE, xcred)))
fail("Unable to set credentials for session:\n%s",
gnutls_strerror(err));
if (use_ticket) {
start("Enable use of session tickets (RFC 5077)");
if (gnutls_session_ticket_enable_client(session))
fail("Unable to enable session tickets:\n%s",
gnutls_strerror(err));
}
if (session_data) {
start("Copy old session");
if ((err = gnutls_session_set_data(session, session_data, session_data_size)))
fail("Unable to set session to previous one:\n%s",
gnutls_strerror(err));
}
s = connect_socket(addr, host, port);
start("Start TLS renegotiation");
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t)(uintptr_t)s);
if ((err = gnutls_handshake(session))) {
fail("Unable to start TLS renegotiation:\n%s",
gnutls_strerror(err));
}
start("Check if session was reused");
if (!gnutls_session_is_resumed(session) && session_data)
warn("No session was reused.");
else if (gnutls_session_is_resumed(session) && !session_data)
warn("Session was reused.");
else if (gnutls_session_is_resumed(session))
end("SSL session correctly reused");
else
end("SSL session was not used");
start("Get current session");
if (session_data) {
free(session_data); session_data = NULL;
}
session_data_size = 8192;
if ((err = gnutls_session_get_data(session, NULL, &session_data_size)))
warn("No session available:\n%s",
gnutls_strerror(err));
else {
session_data = malloc(session_data_size);
if (!session_data) fail("No memory available");
gnutls_session_get_data(session, session_data, &session_data_size);
if ((err = gnutls_session_get_id( session, NULL, &session_id_size)))
warn("No session id available:\n%s",
gnutls_strerror(err));
session_id = malloc(session_id_size);
if (!session_id) fail("No memory available");
else {
if ((err = gnutls_session_get_id( session, session_id, &session_id_size)))
warn("No session id available:\n%s",
gnutls_strerror(err));
session_id_hex = malloc(session_id_size * 2 + 1);
if (!session_id_hex) fail("No memory available");
else {
for (session_id_p = session_id_hex, session_id_idx = 0;
session_id_idx < session_id_size;
++session_id_idx) {
*session_id_p++ = hex[ (session_id[session_id_idx] >> 4) & 0xf];
*session_id_p++ = hex[ session_id[session_id_idx] & 0xf];
}
*session_id_p = '\0';
end("Session context:\nProtocol : %s\nCipher : %s\nKx : %s\nCompression : %s\nPSK : %s\nID : %s",
gnutls_protocol_get_name( gnutls_protocol_get_version(session) ),
gnutls_cipher_get_name( gnutls_cipher_get(session) ),
gnutls_kx_get_name( gnutls_kx_get(session) ),
gnutls_compression_get_name( gnutls_compression_get(session)),
gnutls_psk_server_get_username(session),
session_id_hex
);
free(session_id_hex);
}
free(session_id);
}
}
if (!use_sessionid && !use_ticket) {
free(session_data); session_data = NULL;
}
start("Send HTTP GET");
err = snprintf(buffer, sizeof(buffer),
"GET / HTTP/1.0\r\n"
"Host: %s\r\n"
"\r\n", host);
if (err == -1 || err >= sizeof(buffer))
fail("Unable to build request to send");
if (gnutls_record_send(session, buffer, strlen(buffer)) < 0)
fail("SSL write request failed:\n%s",
gnutls_strerror(err));
start("Get HTTP answer");
if ((err = gnutls_record_recv(session, buffer, sizeof(buffer) - 1)) <= 0)
fail("SSL read request failed:\n%s",
gnutls_strerror(err));
buffer[err] = '\0';
if (strchr(buffer, '\r'))
*strchr(buffer, '\r') = '\0';
end("%s", buffer);
start("End TLS connection");
gnutls_bye(session, GNUTLS_SHUT_RDWR);
close(s);
gnutls_deinit (session);
--reconnect;
if (reconnect < 0) break;
else {
start("waiting %d seconds",delay);
sleep(delay);
}
} while (1);
if (session_data) free(session_data);
gnutls_anon_free_client_credentials(anoncred);
gnutls_global_deinit();
return 0;
}
void session::get_data (void *session_data, size_t * session_data_size) const
{
RETWRAP (gnutls_session_get_data (s, session_data, session_data_size));
}
