add peer certificate on connstate

_gnutls.h

@@ -2,6 +2,7 @@
 #define _GNUTLS_H
 #include <gnutls/gnutls.h>
 #include <gnutls/crypto.h>
+#include <gnutls/abstract.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
@@ -10,13 +11,12 @@ struct session
 {
 	gnutls_session_t session;
 	gnutls_certificate_credentials_t xcred;
-	int handshake;
 	void *data;
 };
 
-extern int DataRead(void *, char *, int);
-extern int DataWrite(void *, char *, int);
-extern int DataTimeoutPull(void *, int);
+extern int OnOnDataReadCallbackCallback(void *, char *, int);
+extern int OnDataWriteCallback(void *, char *, int);
+extern int OnDataTimeoutRead(void *, int);
 
 struct session *init_client_session();
 struct session *init_server_session();
@@ -31,10 +31,27 @@ int set_callback(struct session *sess);
 
 void session_destroy(struct session *);
 
+int OnCertSelectCallback(void *ptr, char *hostname, int namelen,
+						 int *pcert_length, gnutls_pcert_st **cert, gnutls_privkey_t *privke);
+
 gnutls_cipher_hd_t new_cipher(int cipher_type, char *key, int keylen, char *iv, int ivlen);
 
 gnutls_hash_hd_t new_hash(int t);
 
 int alpn_set_protocols(struct session *sess, char **, int);
 int alpn_get_selected_protocol(struct session *sess, char *buf);
+
+gnutls_privkey_t load_privkey(char *keyfile, int *);
+gnutls_pcert_st *load_cert_list(char *certfile, int *, int *);
+
+int get_pcert_alt_name(gnutls_pcert_st *st, int index, int nameindex, char *out);
+
+int get_cert_str(gnutls_pcert_st *st, int index, int flag, char *out);
+
+int get_cert_issuer_dn(gnutls_pcert_st *st, int index, char *out);
+
+int get_cert_dn(gnutls_pcert_st *st, int index, char *out);
+
+void free_cert_list(gnutls_pcert_st *st, int size);
+gnutls_pcert_st *get_peer_certificate(gnutls_session_t sess, int *pcert_length);
 #endif

gnutls.c

@@ -7,6 +7,10 @@ int status;
 int type;
 
 int _init_session(struct session *);
+int cert_select_callback(gnutls_session_t sess, const gnutls_datum_t *req_ca_dn,
+						 int nreqs, const gnutls_pk_algorithm_t *pk_algos,
+						 int pk_algos_length, gnutls_pcert_st **pcert,
+						 unsigned int *pcert_length, gnutls_privkey_t *pkey);
 
 struct session *init_client_session()
 {
@@ -36,33 +40,69 @@ int _init_session(struct session *sess)
 {
 	gnutls_certificate_allocate_credentials(&sess->xcred);
 	gnutls_certificate_set_x509_system_trust(sess->xcred);
+	gnutls_certificate_set_retrieve_function2(sess->xcred, cert_select_callback);
 	gnutls_set_default_priority(sess->session);
 	gnutls_credentials_set(sess->session, GNUTLS_CRD_CERTIFICATE, sess->xcred);
-
 	return 0;
 }
 
 void session_destroy(struct session *sess)
 {
-	gnutls_bye(sess->session, GNUTLS_SHUT_WR);
+	gnutls_bye(sess->session, GNUTLS_SHUT_RDWR);
 	gnutls_deinit(sess->session);
 	gnutls_certificate_free_credentials(sess->xcred);
 	free(sess);
 }
 
+int cert_select_callback(gnutls_session_t sess, const gnutls_datum_t *req_ca_dn,
+						 int nreqs, const gnutls_pk_algorithm_t *pk_algos,
+						 int pk_algos_length, gnutls_pcert_st **pcert,
+						 unsigned int *pcert_length, gnutls_privkey_t *pkey)
+{
+	char hostname[100];
+	int namelen = 100;
+	int type = GNUTLS_NAME_DNS;
+	int ret;
+	void *ptr;
+
+	//printf("cert_select callback\n");
+	if (sess == NULL)
+	{
+		//printf("session is NULL\n");
+		return -1;
+	}
+	ptr = gnutls_session_get_ptr(sess);
+	if (ptr == NULL)
+	{
+		//printf("ptr is NULL\n");
+		return -1;
+	}
+	ret = gnutls_server_name_get(sess, hostname, (size_t *)(&namelen), &type, 0);
+	if (ret < 0)
+	{
+		//printf("get server name error: %s\n", gnutls_strerror(ret));
+		namelen = 0;
+		//return -1;
+	}
+	//printf("call go callback\n");
+	ret = OnCertSelectCallback(ptr, hostname, namelen, pcert_length, pcert, pkey);
+	//printf("after callback pcert_length %d, pcert 0x%x, pkey 0x%x\n", *pcert_length, pcert, pkey);
+	return ret;
+}
+
 ssize_t pull_function(gnutls_transport_ptr_t ptr, void *data, size_t len)
 {
-	return DataRead(ptr, data, len);
+	return OnOnDataReadCallbackCallback(ptr, data, len);
 }
 
 int pull_timeout_function(gnutls_transport_ptr_t ptr, unsigned int ms)
 {
-	return DataTimeoutPull(ptr, ms);
+	return OnDataTimeoutRead(ptr, ms);
 }
 
 ssize_t push_function(gnutls_transport_ptr_t ptr, const void *data, size_t len)
 {
-	return DataWrite(ptr, (char *)data, len);
+	return OnDataWriteCallback(ptr, (char *)data, len);
 }
 
 void set_data(struct session *sess, size_t data)
@@ -72,15 +112,12 @@ void set_data(struct session *sess, size_t data)
 
 int handshake(struct session *sess)
 {
-	if (sess->handshake > 0)
-	{
-		return 0;
-	}
 
 	int ret;
 	do
 	{
 		ret = gnutls_handshake(sess->session);
+		//printf("handshake ret %d\n", ret);
 	} while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
 
 	if (ret < 0)
@@ -108,9 +145,11 @@ int set_callback(struct session *sess)
 {
 	if (sess->data == NULL)
 	{
+		printf("set callback failed\n");
 		return -1;
 	}
 	gnutls_transport_set_ptr(sess->session, sess->data);
+	gnutls_session_set_ptr(sess->session, sess->data);
 	gnutls_transport_set_pull_function(sess->session, pull_function);
 	gnutls_transport_set_push_function(sess->session, push_function);
 	gnutls_transport_set_pull_timeout_function(sess->session, pull_timeout_function);
@@ -181,4 +220,222 @@ int alpn_get_selected_protocol(struct session *sess, char *buf)
 	// note: p.data is constant value, only valid during the session life
 
 	return 0;
+}
+
+void free_cert_list(gnutls_pcert_st *st, int size)
+{
+	int i;
+	gnutls_pcert_st *st1;
+	for (i = 0; i < size; i++)
+	{
+		st1 = st + i;
+		gnutls_pcert_deinit(st1);
+	}
+	free(st);
+}
+
+gnutls_pcert_st *load_cert_list(char *certfile, int *cert_size, int *retcode)
+{
+	gnutls_datum_t data;
+	int maxsize = 10;
+	int ret;
+	gnutls_pcert_st *st = malloc(10 * sizeof(gnutls_pcert_st));
+	ret = gnutls_load_file(certfile, &data);
+	if (ret < 0)
+	{
+		//printf("load file failed: %s", gnutls_strerror(ret));
+		*retcode = ret;
+		return NULL;
+	}
+	ret = gnutls_pcert_list_import_x509_raw(
+		st, &maxsize, &data, GNUTLS_X509_FMT_PEM, 0);
+	if (ret < 0)
+	{
+		gnutls_free(data.data);
+		//printf("import certificate failed: %s", gnutls_strerror(ret));
+		*retcode = ret;
+		return NULL;
+	}
+	gnutls_free(data.data);
+	*cert_size = maxsize;
+	*retcode = 0;
+	return st;
+}
+
+gnutls_privkey_t load_privkey(char *keyfile, int *retcode)
+{
+	gnutls_privkey_t privkey;
+	gnutls_datum_t data;
+	int ret;
+	ret = gnutls_load_file(keyfile, &data);
+	if (ret < 0)
+	{
+		//printf("load file failed: %s", gnutls_strerror(ret));
+		*retcode = ret;
+		return NULL;
+	}
+	gnutls_privkey_init(&privkey);
+	ret = gnutls_privkey_import_x509_raw(
+		privkey, &data, GNUTLS_X509_FMT_PEM, NULL, 0);
+	if (ret < 0)
+	{
+		//printf("import privkey failed: %s", gnutls_strerror(ret));
+		*retcode = ret;
+		gnutls_free(data.data);
+		return NULL;
+	}
+	gnutls_free(data.data);
+	*retcode = 0;
+	return privkey;
+}
+
+int get_pcert_alt_name(
+	gnutls_pcert_st *st, int index, int nameindex, char *out)
+{
+	gnutls_x509_crt_t crt;
+	int ret;
+	char data[1024];
+	size_t size = 1024;
+	gnutls_pcert_st *st1 = st + index;
+	ret = gnutls_x509_crt_init(&crt);
+	if (ret < 0)
+	{
+		return ret;
+	}
+	ret = gnutls_pcert_export_x509(st1, &crt);
+	if (ret < 0)
+	{
+		gnutls_x509_crt_deinit(crt);
+		return ret;
+	}
+	ret = gnutls_x509_crt_get_subject_alt_name(
+		crt, nameindex, (void *)data, &size, NULL);
+	if (ret < 0)
+	{
+		gnutls_x509_crt_deinit(crt);
+		return ret;
+	}
+	gnutls_x509_crt_deinit(crt);
+	memcpy(out, data, size);
+	return size;
+}
+
+int get_cert_str(gnutls_pcert_st *st, int index, int flag, char *out)
+{
+	gnutls_x509_crt_t crt;
+	int ret;
+	gnutls_datum_t data;
+	gnutls_pcert_st *st1 = st + index;
+	ret = gnutls_x509_crt_init(&crt);
+	if (ret < 0)
+	{
+		return ret;
+	}
+	ret = gnutls_pcert_export_x509(st1, &crt);
+	if (ret < 0)
+	{
+		gnutls_x509_crt_deinit(crt);
+		return ret;
+	}
+	ret = gnutls_x509_crt_print(crt, flag, &data);
+	if (ret < 0)
+	{
+		return ret;
+	}
+	memcpy(out, data.data, data.size);
+	gnutls_free(data.data);
+	gnutls_x509_crt_deinit(crt);
+	return data.size;
+}
+
+int get_cert_dn(gnutls_pcert_st *st, int index, char *out)
+{
+
+	gnutls_x509_crt_t crt;
+	int ret;
+	char data[200];
+	size_t size = 200;
+	gnutls_pcert_st *st1 = st + index;
+	ret = gnutls_x509_crt_init(&crt);
+	if (ret < 0)
+	{
+		return ret;
+	}
+	ret = gnutls_pcert_export_x509(st1, &crt);
+	if (ret < 0)
+	{
+		gnutls_x509_crt_deinit(crt);
+		return ret;
+	}
+	ret = gnutls_x509_crt_get_dn(crt, data, &size);
+	if (ret < 0)
+	{
+		gnutls_x509_crt_deinit(crt);
+		return ret;
+	}
+	memcpy(out, data, size);
+	return size;
+}
+
+int get_cert_issuer_dn(gnutls_pcert_st *st, int index, char *out)
+{
+
+	gnutls_x509_crt_t crt;
+	int ret;
+	char data[200];
+	size_t size = 200;
+	gnutls_pcert_st *st1 = st + index;
+	ret = gnutls_x509_crt_init(&crt);
+	if (ret < 0)
+	{
+		return ret;
+	}
+	ret = gnutls_pcert_export_x509(st1, &crt);
+	if (ret < 0)
+	{
+		gnutls_x509_crt_deinit(crt);
+		return ret;
+	}
+	ret = gnutls_x509_crt_get_issuer_dn(crt, data, &size);
+	if (ret < 0)
+	{
+		gnutls_x509_crt_deinit(crt);
+		return ret;
+	}
+	memcpy(out, data, size);
+	return size;
+}
+
+gnutls_pcert_st *get_peer_certificate(gnutls_session_t sess, int *pcert_length)
+{
+	const gnutls_datum_t *raw_certs;
+	const gnutls_datum_t *d;
+	gnutls_pcert_st *st, *st1;
+	int ret;
+	int i;
+	*pcert_length = 0;
+	raw_certs = gnutls_certificate_get_peers(sess, pcert_length);
+	if (pcert_length == NULL)
+	{
+		printf("pcert length is NULL\n");
+		return NULL;
+	}
+	if (*pcert_length == 0)
+	{
+		printf("pcert length is 0\n");
+		return NULL;
+	}
+	//printf("pcert length %d\n", *pcert_length);
+	st = malloc((*pcert_length) * sizeof(gnutls_pcert_st));
+	for (i = 0; i < *pcert_length; i++)
+	{
+		st1 = st + i;
+		d = raw_certs + i;
+		ret = gnutls_pcert_import_x509_raw(st1, d, GNUTLS_X509_FMT_DER, 0);
+		if (ret < 0)
+		{
+			printf("import cert failed: %s\n", gnutls_strerror(ret));
+		}
+	}
+	return st;
 }

testdata/server.crt

@@ -1,21 +1,23 @@
 -----BEGIN CERTIFICATE-----
-MIIDYDCCAkigAwIBAgIJAJ92ThBK0H0ZMA0GCSqGSIb3DQEBCwUAMEUxCzAJBgNV
-BAYTAkFVMRMwEQYDVQQIDApTb21lLVN0YXRlMSEwHwYDVQQKDBhJbnRlcm5ldCBX
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-Qff5gg==
+MIIDzDCCArSgAwIBAgIJAInocGP04UR9MA0GCSqGSIb3DQEBCwUAMHsxCzAJBgNV
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+dA9dGTT5aTst1KyRtIyAkg==
 -----END CERTIFICATE-----

testdata/server2.crt

@@ -0,0 +1,21 @@
+-----BEGIN CERTIFICATE-----
+MIIDjDCCAnSgAwIBAgIJAPls60eMgWdFMA0GCSqGSIb3DQEBCwUAMFsxCzAJBgNV
+BAYTAkFVMRMwEQYDVQQIDApTb21lLVN0YXRlMSEwHwYDVQQKDBhJbnRlcm5ldCBX
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+Qaik9QX4Xb7YVwUBGQWDqxK1m/+FxtMpralaigUxVyOYS6CFF1RFcbcptd0jTtJS
+-----END CERTIFICATE-----

testdata/server2.key

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----

testdata/server3.crt

@@ -0,0 +1,21 @@
+-----BEGIN CERTIFICATE-----
+MIIDiDCCAnCgAwIBAgIJAN+27ugRe7kwMA0GCSqGSIb3DQEBCwUAMFkxCzAJBgNV
+BAYTAkFVMRMwEQYDVQQIDApTb21lLVN0YXRlMSEwHwYDVQQKDBhJbnRlcm5ldCBX
+aWRnaXRzIFB0eSBMdGQxEjAQBgNVBAMMCSouYWFhLmNvbTAeFw0xODA3MDYwMTQ1
+MDNaFw0xODA4MDUwMTQ1MDNaMFkxCzAJBgNVBAYTAkFVMRMwEQYDVQQIDApTb21l
+LVN0YXRlMSEwHwYDVQQKDBhJbnRlcm5ldCBXaWRnaXRzIFB0eSBMdGQxEjAQBgNV
+BAMMCSouYWFhLmNvbTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBANCS
+OnOOSOwuLnukitv1itAsNokLuV+YnEwZCRD3X8yLhhEVPftpo0DobOO3Lg38JmWg
+zKQem41nE8ruMEAUZSlPHeHKc+yHbqWGBpXlcxXihyVWouZaKT7YFQp9E8CRSscS
+9yeXRkKfH7Yh6660OysqZfCAhjKxUCvvp1W3sWqLx8ssdGcuLD+CaOGJMv66n3nS
+qfFZXE8H7vdB+TFUlvNcRgAoSxV36zS2i3HcUv+SUGXoupAJG3l23x3UhZky7Yo7
+qJkT681O8zuhAv/tZPqv5PHLOl9t4mYc4jX+TZ2ZNLckZ+VjNPPVn920/fZ1cvio
+GuBjekzPewXE6O8NaH0CAwEAAaNTMFEwHQYDVR0OBBYEFNC8YhToPT55/xEziMnR
+zbVOM/o+MB8GA1UdIwQYMBaAFNC8YhToPT55/xEziMnRzbVOM/o+MA8GA1UdEwEB
+/wQFMAMBAf8wDQYJKoZIhvcNAQELBQADggEBAFccqqBIdCwMjbxcaFY6vwHUSdid
+YrVcQSHy6w7hUG9Una7HAqyGrK0Uwe+njR8eE0Xs7Q+QviQDijgC4FHfkrEPFZYG
+9yVAAcwNl2NxuKAwHtao/P7JwBCsuGamDOxq/C9nN5M9USiBnBytYGv1a3CYEYl9
+tmjegWe2lN9eyqtbqTH218tMa/avUzOkkRkPKuik1BIFDCkzbfqnlI6uUpzdKqAR
+jkj9MHtFjJ5SxtW8ak9Lo78zawbfdLuec9NfJZaTZqIy969+0apYCQ66wUBMwa8u
+u3rVWdkWDEoFx5KnEUchKD1/pgI+mU45kqay1kxW3A9Qvt1NNK9hVEGcCGw=
+-----END CERTIFICATE-----

testdata/server3.key

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----

tls.go

@@ -9,7 +9,6 @@ import (
 	"fmt"
 	"log"
 	"net"
-	"os"
 	"time"
 	"unsafe"
 )
@@ -24,17 +23,17 @@ const (
 // Conn tls connection for client
 type Conn struct {
 	c         net.Conn
-	sess      *C.struct_session
 	handshake bool
+	sess      *C.struct_session
 	cservname *C.char
 	state     *ConnectionState
+	cfg       *Config
 }
 
 // Config tls configure
 type Config struct {
 	ServerName         string
-	CrtFile            string
-	KeyFile            string
+	Certificates       []*Certificate
 	InsecureSkipVerify bool
 	NextProtos         []string
 }
@@ -49,7 +48,8 @@ type ConnectionState struct {
 	// TLS version number, ex: 0x303
 	Version uint16
 	// TLS version number, ex: TLS1.0
-	VersionName string
+	VersionName     string
+	PeerCertificate *Certificate
 }
 
 type listener struct {
@@ -90,15 +90,6 @@ func Listen(network, addr string, cfg *Config) (net.Listener, error) {
 	if cfg == nil {
 		return nil, fmt.Errorf("config is need")
 	}
-	if cfg.CrtFile == "" || cfg.KeyFile == "" {
-		return nil, fmt.Errorf("keyfile is needed")
-	}
-	if _, err := os.Stat(cfg.CrtFile); err != nil {
-		return nil, err
-	}
-	if _, err := os.Stat(cfg.KeyFile); err != nil {
-		return nil, err
-	}
 	l, err := net.Listen(network, addr)
 	if err != nil {
 		return nil, err
@@ -109,21 +100,12 @@ func Listen(network, addr string, cfg *Config) (net.Listener, error) {
 // NewServerConn create a server Conn
 func NewServerConn(c net.Conn, cfg *Config) (*Conn, error) {
 	var sess = C.init_server_session()
-	conn := &Conn{c: c, sess: sess}
+	conn := &Conn{c: c, sess: sess, cfg: cfg}
 	n := C.size_t(uintptr(unsafe.Pointer(conn)))
 	//log.Println("conn addr ", int(n))
 	C.set_data(sess, n)
 	C.set_callback(sess)
-	crtfile := C.CString(cfg.CrtFile)
-	keyfile := C.CString(cfg.KeyFile)
-	defer C.free(unsafe.Pointer(crtfile))
-	defer C.free(unsafe.Pointer(keyfile))
-	ret := C.gnutls_certificate_set_x509_key_file(
-		sess.xcred, crtfile, keyfile, GNUTLS_X509_FMT_PEM)
-	if int(ret) < 0 {
-		cerrstr := C.gnutls_strerror(ret)
-		return nil, fmt.Errorf("set keyfile failed: %s", C.GoString(cerrstr))
-	}
+
 	if cfg.NextProtos != nil {
 		if err := setAlpnProtocols(sess, cfg); err != nil {
 			log.Println(err)
@@ -135,7 +117,7 @@ func NewServerConn(c net.Conn, cfg *Config) (*Conn, error) {
 // NewClientConn create a new gnutls connection
 func NewClientConn(c net.Conn, cfg *Config) (*Conn, error) {
 	var sess = C.init_client_session()
-	conn := &Conn{c: c, sess: sess}
+	conn := &Conn{c: c, sess: sess, cfg: cfg}
 	n := C.size_t(uintptr(unsafe.Pointer(conn)))
 	//log.Println("conn addr ", int(n))
 	C.set_data(sess, n)
@@ -149,18 +131,6 @@ func NewClientConn(c net.Conn, cfg *Config) (*Conn, error) {
 				unsafe.Pointer(srvname), C.size_t(len(cfg.ServerName)))
 		}
 
-		if cfg.CrtFile != "" && cfg.KeyFile != "" {
-			crtfile := C.CString(cfg.CrtFile)
-			keyfile := C.CString(cfg.KeyFile)
-			defer C.free(unsafe.Pointer(crtfile))
-			defer C.free(unsafe.Pointer(keyfile))
-			ret := C.gnutls_certificate_set_x509_key_file(
-				sess.xcred, crtfile, keyfile, GNUTLS_X509_FMT_PEM)
-			if int(ret) < 0 {
-				return nil, fmt.Errorf("set keyfile failed: %s",
-					C.GoString(C.gnutls_strerror(ret)))
-			}
-		}
 		if !cfg.InsecureSkipVerify {
 			if conn.cservname != nil {
 				C.gnutls_session_set_verify_cert(sess.session, conn.cservname, 0)
@@ -270,11 +240,16 @@ func (c *Conn) Write(buf []byte) (n int, err error) {
 
 // Close close the conn and destroy the tls context
 func (c *Conn) Close() error {
+	C.gnutls_record_send(c.sess.session, nil, 0)
 	C.session_destroy(c.sess)
 	c.c.Close()
 	if c.cservname != nil {
 		C.free(unsafe.Pointer(c.cservname))
 	}
+
+	if c.state != nil && c.state.PeerCertificate != nil {
+		c.state.PeerCertificate.Free()
+	}
 	return nil
 }
 
@@ -320,11 +295,21 @@ func (c *Conn) ConnectionState() *ConnectionState {
 		HandshakeComplete:  c.handshake,
 		ServerName:         c.getServerName(),
 		VersionName:        versionname,
+		PeerCertificate:    c.getPeerCertificate(),
 	}
 	c.state = state
 	return state
 }
 
+func (c *Conn) getPeerCertificate() *Certificate {
+	var size int
+	st := C.get_peer_certificate(c.sess.session, (*C.int)(unsafe.Pointer(&size)))
+	if st == nil {
+		return nil
+	}
+	return &Certificate{cert: st, certSize: C.int(size)}
+}
+
 func (c *Conn) getAlpnSelectedProtocol() string {
 	cbuf := C.malloc(100)
 	defer C.free(cbuf)
@@ -353,9 +338,9 @@ func (c *Conn) getServerName() string {
 	return name
 }
 
-// DataRead c callback function for data read
-//export DataRead
-func DataRead(d unsafe.Pointer, cbuf *C.char, bufLen C.int) C.int {
+// OnDataReadCallback c callback function for data read
+//export OnDataReadCallback
+func OnDataReadCallback(d unsafe.Pointer, cbuf *C.char, bufLen C.int) C.int {
 	//log.Println("read addr ", uintptr(d))
 	conn := (*Conn)(unsafe.Pointer((uintptr(d))))
 	buf := make([]byte, int(bufLen))
@@ -371,9 +356,9 @@ func DataRead(d unsafe.Pointer, cbuf *C.char, bufLen C.int) C.int {
 	return C.int(n)
 }
 
-// DataWrite c callback function for data write
-//export DataWrite
-func DataWrite(d unsafe.Pointer, cbuf *C.char, bufLen C.int) C.int {
+// OnDataWriteCallback c callback function for data write
+//export OnDataWriteCallback
+func OnDataWriteCallback(d unsafe.Pointer, cbuf *C.char, bufLen C.int) C.int {
 	//log.Println("write addr ", uintptr(d), int(_l))
 	conn := (*Conn)(unsafe.Pointer((uintptr(d))))
 	gobuf := C.GoBytes(unsafe.Pointer(cbuf), bufLen)
@@ -385,9 +370,50 @@ func DataWrite(d unsafe.Pointer, cbuf *C.char, bufLen C.int) C.int {
 	return C.int(n)
 }
 
-// DataTimeoutPull c callback function for timeout read
-//export DataTimeoutPull
-func DataTimeoutPull(d unsafe.Pointer, delay C.int) C.int {
+// OnDataTimeoutRead c callback function for timeout read
+//export OnDataTimeoutRead
+func OnDataTimeoutRead(d unsafe.Pointer, delay C.int) C.int {
 	log.Println("timeout pull function")
 	return 0
 }
+
+// OnCertSelectCallback callback function for ceritificate select
+//export OnCertSelectCallback
+func OnCertSelectCallback(ptr unsafe.Pointer, hostname *C.char,
+	namelen C.int, pcertLength *C.int, cert **C.gnutls_pcert_st, privkey *C.gnutls_privkey_t) C.int {
+
+	servername := C.GoStringN(hostname, namelen)
+	//log.Println("go cert select callback ", servername)
+	conn := (*Conn)(unsafe.Pointer((uintptr(ptr))))
+	//log.Println(conn)
+	if int(namelen) == 0 && conn.cfg.Certificates != nil {
+		_cert := conn.cfg.Certificates[0]
+		*pcertLength = _cert.certSize
+		*cert = _cert.cert
+		*privkey = _cert.privkey
+		//log.Println("set pcert length ", _cert.certSize)
+		return 0
+	}
+	for _, _cert := range conn.cfg.Certificates {
+		//log.Println(cert)
+		if _cert.matchName(servername) {
+			//log.Println("matched name ", _cert.names)
+			*pcertLength = _cert.certSize
+			*cert = _cert.cert
+			*privkey = _cert.privkey
+			//log.Println("set pcert length ", _cert.certSize)
+			return 0
+		}
+	}
+	if conn.cfg.Certificates != nil {
+		_cert := conn.cfg.Certificates[0]
+		*pcertLength = _cert.certSize
+		*cert = _cert.cert
+		*privkey = _cert.privkey
+		//log.Println("set pcert length ", _cert.certSize)
+		return 0
+	}
+	*pcertLength = 0
+	//log.Println("set pcert length 0")
+	return -1
+}

tls_test.go

@@ -1,9 +1,15 @@
 package gnutls
 
 import (
+	"bufio"
+	"bytes"
 	"crypto/tls"
+	"fmt"
+	"io"
 	"log"
 	"net"
+	"net/http"
+	"os"
 	"testing"
 )
 
@@ -66,8 +72,13 @@ func TestTLSClient(t *testing.T) {
 }
 
 func TestTLSServer(t *testing.T) {
+	cert, err := LoadX509KeyPair("testdata/server.crt", "testdata/server.key")
+	if err != nil {
+		t.Fatal(err)
+	}
 	l, err := Listen("tcp", "127.0.0.1:0", &Config{
-		CrtFile: "testdata/server.crt", KeyFile: "testdata/server.key"})
+		Certificates: []*Certificate{cert},
+	})
 	if err != nil {
 		t.Fatal("gnutls listen ", err)
 	}
@@ -84,7 +95,11 @@ func TestTLSServer(t *testing.T) {
 			log.Println("accept connection from ", c.RemoteAddr())
 			go func(c net.Conn) {
 				defer c.Close()
-
+				tlsconn := c.(*Conn)
+				if err := tlsconn.Handshake(); err != nil {
+					log.Println(err)
+					return
+				}
 				buf := make([]byte, 4096)
 				for {
 					n, err := c.Read(buf[0:])
@@ -125,11 +140,13 @@ func TestTLSALPNServer(t *testing.T) {
 	serveralpn := []string{"a1", "a3", "a2"}
 	clientalpn := []string{"a0", "a2", "a5"}
 	expectedAlpn := "a2"
-
+	cert, err := LoadX509KeyPair("testdata/server.crt", "testdata/server.key")
+	if err != nil {
+		t.Fatal(err)
+	}
 	l, err := Listen("tcp", "127.0.0.1:0", &Config{
-		CrtFile:    "testdata/server.crt",
-		KeyFile:    "testdata/server.key",
-		NextProtos: serveralpn,
+		Certificates: []*Certificate{cert},
+		NextProtos:   serveralpn,
 	})
 	if err != nil {
 		t.Fatal("gnutls listen ", err)
@@ -292,3 +309,100 @@ func TestTLSALPNClient(t *testing.T) {
 		t.Errorf("need: %s, got: %s", data, string(buf[:n]))
 	}
 }
+
+func TestTLSServerSNI(t *testing.T) {
+	certificates := []*Certificate{}
+	cert, err := LoadX509KeyPair("testdata/server.crt", "testdata/server.key")
+	if err != nil {
+		t.Fatal("load key failed")
+	}
+
+	certificates = append(certificates, cert)
+	cert, err = LoadX509KeyPair("testdata/server2.crt", "testdata/server2.key")
+	if err != nil {
+		t.Fatal("load key failed")
+	}
+
+	certificates = append(certificates, cert)
+	cert, err = LoadX509KeyPair("testdata/server3.crt", "testdata/server3.key")
+	if err != nil {
+		t.Fatal("load key failed")
+	}
+	certificates = append(certificates, cert)
+
+	l, err := Listen("tcp", "127.0.0.1:0", &Config{
+		Certificates: certificates,
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer l.Close()
+	addr := l.Addr().String()
+	go func() {
+		for {
+			c, err := l.Accept()
+			if err != nil {
+				log.Println(err)
+				break
+			}
+			go func(c net.Conn) {
+				defer c.Close()
+				tlsconn := c.(*Conn)
+				if err := tlsconn.Handshake(); err != nil {
+					log.Println(err)
+					return
+				}
+				state := tlsconn.ConnectionState()
+				fmt.Fprintf(c, state.ServerName)
+			}(c)
+		}
+	}()
+
+	for _, servername := range []string{"abc.com", "example.com", "a.aaa.com", "b.aaa.com"} {
+		conn, err := tls.Dial("tcp", addr, &tls.Config{
+			ServerName:         servername,
+			InsecureSkipVerify: true,
+		})
+		if err != nil {
+			t.Fatal(err)
+		}
+		//state := conn.ConnectionState()
+		//log.Printf("%+v", state.PeerCertificates[0])
+		buf := make([]byte, 100)
+		n, err := conn.Read(buf)
+		if err != nil && err != io.EOF {
+			t.Error(err)
+		}
+		if !bytes.Equal(buf[:n], []byte(servername)) {
+			t.Errorf("expect %s, got %s", servername, string(buf[:n]))
+		}
+		conn.Close()
+	}
+}
+
+func TestTLSGetPeerCert(t *testing.T) {
+	conn, err := Dial("tcp", "www.ratafee.nl:443", &Config{
+		ServerName: "www.ratafee.nl",
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer conn.Close()
+	//tlsconn := conn.(*Conn)
+	if err := conn.Handshake(); err != nil {
+		t.Fatal(err)
+	}
+	state := conn.ConnectionState()
+	for i := 0; i < int(state.PeerCertificate.certSize); i++ {
+		log.Println(state.PeerCertificate.getCertString(i, 1))
+	}
+
+	req, _ := http.NewRequest("GET", "https://www.ratafee.nl/httpbin/ip", nil)
+	req.Write(conn)
+	r := bufio.NewReader(conn)
+	resp, err := http.ReadResponse(r, req)
+	if err != nil {
+		t.Error(err)
+	}
+	resp.Write(os.Stdout)
+}