-/* $OpenBSD: tls.c,v 1.41 2016/07/07 14:09:03 jsing Exp $ */
+/* $OpenBSD: tls.c,v 1.42 2016/08/01 17:32:19 jsing Exp $ */
/*
* Copyright (c) 2014 Joel Sing <jsing@openbsd.org>
*
if ((ctx->config->protocols & TLS_PROTOCOL_TLSv1_2) == 0)
SSL_CTX_set_options(ctx->ssl_ctx, SSL_OP_NO_TLSv1_2);
+ if (ctx->config->alpn != NULL) {
+ if (SSL_CTX_set_alpn_protos(ctx->ssl_ctx, ctx->config->alpn,
+ ctx->config->alpn_len) != 0) {
+ tls_set_errorx(ctx, "failed to set alpn");
+ goto err;
+ }
+ }
+
if (ctx->config->ciphers != NULL) {
if (SSL_CTX_set_cipher_list(ctx->ssl_ctx,
ctx->config->ciphers) != 1) {
-/* $OpenBSD: tls.h,v 1.29 2016/05/27 14:21:24 jsing Exp $ */
+/* $OpenBSD: tls.h,v 1.30 2016/08/01 17:32:19 jsing Exp $ */
/*
* Copyright (c) 2014 Joel Sing <jsing@openbsd.org>
*
struct tls_config *tls_config_new(void);
void tls_config_free(struct tls_config *_config);
+int tls_config_set_alpn(struct tls_config *_config, const char *_alpn);
int tls_config_set_ca_file(struct tls_config *_config, const char *_ca_file);
int tls_config_set_ca_path(struct tls_config *_config, const char *_ca_path);
int tls_config_set_ca_mem(struct tls_config *_config, const uint8_t *_ca,
time_t tls_peer_cert_notbefore(struct tls *_ctx);
time_t tls_peer_cert_notafter(struct tls *_ctx);
-const char *tls_conn_version(struct tls *_ctx);
+const char *tls_conn_alpn_selected(struct tls *_ctx);
const char *tls_conn_cipher(struct tls *_ctx);
+const char *tls_conn_version(struct tls *_ctx);
uint8_t *tls_load_file(const char *_file, size_t *_len, char *_password);
-/* $OpenBSD: tls_config.c,v 1.22 2016/07/13 16:30:48 jsing Exp $ */
+/* $OpenBSD: tls_config.c,v 1.23 2016/08/01 17:32:19 jsing Exp $ */
/*
* Copyright (c) 2014 Joel Sing <jsing@openbsd.org>
*
free(config->error.msg);
+ free(config->alpn);
free((char *)config->ca_file);
free((char *)config->ca_mem);
free((char *)config->ca_path);
return (0);
}
+static int
+tls_config_parse_alpn(struct tls_config *config, const char *alpn,
+ char **alpn_data, size_t *alpn_len)
+{
+ size_t buf_len, i, len;
+ char *buf = NULL;
+ char *s = NULL;
+ char *p, *q;
+
+ free(*alpn_data);
+ *alpn_data = NULL;
+ *alpn_len = 0;
+
+ if ((buf_len = strlen(alpn) + 1) > 65535) {
+ tls_config_set_errorx(config, "alpn too large");
+ goto err;
+ }
+
+ if ((buf = malloc(buf_len)) == NULL) {
+ tls_config_set_errorx(config, "out of memory");
+ goto err;
+ }
+
+ if ((s = strdup(alpn)) == NULL) {
+ tls_config_set_errorx(config, "out of memory");
+ goto err;
+ }
+
+ i = 0;
+ q = s;
+ while ((p = strsep(&q, ",")) != NULL) {
+ if ((len = strlen(p)) == 0) {
+ tls_config_set_errorx(config,
+ "alpn protocol with zero length");
+ goto err;
+ }
+ if (len > 255) {
+ tls_config_set_errorx(config,
+ "alpn protocol too long");
+ goto err;
+ }
+ buf[i++] = len & 0xff;
+ memcpy(&buf[i], p, len);
+ i += len;
+ }
+
+ free(s);
+
+ *alpn_data = buf;
+ *alpn_len = buf_len;
+
+ return (0);
+
+ err:
+ free(buf);
+ free(s);
+
+ return (-1);
+}
+
+int
+tls_config_set_alpn(struct tls_config *config, const char *alpn)
+{
+ return tls_config_parse_alpn(config, alpn, &config->alpn,
+ &config->alpn_len);
+}
+
int
tls_config_set_ca_file(struct tls_config *config, const char *ca_file)
{
-/* $OpenBSD: tls_conninfo.c,v 1.5 2015/10/07 23:33:38 beck Exp $ */
+/* $OpenBSD: tls_conninfo.c,v 1.6 2016/08/01 17:32:19 jsing Exp $ */
/*
* Copyright (c) 2015 Joel Sing <jsing@openbsd.org>
* Copyright (c) 2015 Bob Beck <beck@openbsd.org>
return (rv);
}
+static int
+tls_conninfo_alpn_proto(struct tls *ctx)
+{
+ const unsigned char *p;
+ unsigned int len;
+
+ free(ctx->conninfo->alpn);
+ ctx->conninfo->alpn = NULL;
+
+ SSL_get0_alpn_selected(ctx->ssl_conn, &p, &len);
+ if (len > 0) {
+ if ((ctx->conninfo->alpn = malloc(len + 1)) == NULL)
+ return (-1);
+ memcpy(ctx->conninfo->alpn, p, len);
+ ctx->conninfo->alpn[len] = '\0';
+ }
+
+ return (0);
+}
+
int
tls_get_conninfo(struct tls *ctx) {
const char * tmp;
ctx->conninfo->cipher = strdup(tmp);
if (ctx->conninfo->cipher == NULL)
goto err;
+ if (tls_conninfo_alpn_proto(ctx) == -1)
+ goto err;
+
return (0);
err:
tls_free_conninfo(ctx->conninfo);
void
tls_free_conninfo(struct tls_conninfo *conninfo) {
if (conninfo != NULL) {
+ free(conninfo->alpn);
+ conninfo->alpn = NULL;
free(conninfo->hash);
conninfo->hash = NULL;
free(conninfo->subject);
}
}
+const char *
+tls_conn_alpn_selected(struct tls *ctx)
+{
+ if (ctx->conninfo == NULL)
+ return (NULL);
+ return (ctx->conninfo->alpn);
+}
+
const char *
tls_conn_cipher(struct tls *ctx)
{
-.\" $OpenBSD: tls_init.3,v 1.62 2016/07/13 16:30:48 jsing Exp $
+.\" $OpenBSD: tls_init.3,v 1.63 2016/08/01 17:32:19 jsing Exp $
.\"
.\" Copyright (c) 2014 Ted Unangst <tedu@openbsd.org>
.\"
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
-.Dd $Mdocdate: July 13 2016 $
+.Dd $Mdocdate: August 1 2016 $
.Dt TLS_INIT 3
.Os
.Sh NAME
.Nm tls_config_new ,
.Nm tls_config_free ,
.Nm tls_config_parse_protocols ,
+.Nm tls_config_set_alpn ,
.Nm tls_config_set_ca_file ,
.Nm tls_config_set_ca_path ,
.Nm tls_config_set_ca_mem ,
.Nm tls_peer_cert_hash ,
.Nm tls_peer_cert_notbefore ,
.Nm tls_peer_cert_notafter ,
-.Nm tls_conn_version ,
+.Nm tls_conn_alpn_selected ,
.Nm tls_conn_cipher ,
+.Nm tls_conn_version ,
.Nm tls_load_file ,
.Nm tls_client ,
.Nm tls_server ,
.Ft "int"
.Fn tls_config_parse_protocols "uint32_t *protocols" "const char *protostr"
.Ft "int"
+.Fn tls_config_set_alpn "struct tls_config *config" "const char *alpn"
+.Ft "int"
.Fn tls_config_set_ca_file "struct tls_config *config" "const char *ca_file"
.Ft "int"
.Fn tls_config_set_ca_path "struct tls_config *config" "const char *ca_path"
.Ft "time_t"
.Fn tls_peer_cert_notafter "struct tls *ctx"
.Ft "const char *"
-.Fn tls_conn_version "struct tls *ctx"
+.Fn tls_conn_alpn_selected "struct tls *ctx"
.Ft "const char *"
.Fn tls_conn_cipher "struct tls *ctx"
+.Ft "const char *"
+.Fn tls_conn_version "struct tls *ctx"
.Ft "uint8_t *"
.Fn tls_load_file "const char *file" "size_t *len" "char *password"
.Ft "struct tls *"
Configuration options may apply to only clients or only servers or both.
.Bl -bullet -offset four
.It
+.Fn tls_config_set_alpn
+sets the ALPN protocols that are supported.
+The alpn string is a comma separated list of protocols, in order of preference.
+.Em (Client and Server)
+.It
.Fn tls_config_set_ca_file
sets the filename used to load a file
containing the root certificates.
will only succeed after the handshake is complete.
.Em (Server and client)
.It
-.Fn tls_conn_version
-returns a string
-corresponding to a TLS version negotiated with the peer
+.Fn tls_conn_alpn_selected
+returns a string that specifies the ALPN protocol selected for use with the peer
connected to
.Ar ctx .
-.Fn tls_conn_version
+If no protocol was selected then NULL is returned.
+.Fn tls_conn_alpn_selected
will only succeed after the handshake is complete.
+.Em (Server and Client)
.It
.Fn tls_conn_cipher
returns a string
will only succeed after the handshake is complete.
.Em (Server and client)
.It
+.Fn tls_conn_version
+returns a string
+corresponding to a TLS version negotiated with the peer
+connected to
+.Ar ctx .
+.Fn tls_conn_version
+will only succeed after the handshake is complete.
+.It
.Fn tls_load_file
loads a certificate or key from disk into memory to be loaded with
.Fn tls_config_set_ca_mem ,
-/* $OpenBSD: tls_internal.h,v 1.32 2016/07/13 16:30:48 jsing Exp $ */
+/* $OpenBSD: tls_internal.h,v 1.33 2016/08/01 17:32:19 jsing Exp $ */
/*
* Copyright (c) 2014 Jeremie Courreges-Anglas <jca@openbsd.org>
* Copyright (c) 2014 Joel Sing <jsing@openbsd.org>
struct tls_config {
struct tls_error error;
+ char *alpn;
+ size_t alpn_len;
const char *ca_file;
const char *ca_path;
char *ca_mem;
};
struct tls_conninfo {
+ char *alpn;
char *issuer;
char *subject;
char *hash;
SSL *ssl_conn;
SSL_CTX *ssl_ctx;
X509 *ssl_peer_cert;
+
struct tls_conninfo *conninfo;
};
-/* $OpenBSD: tls_server.c,v 1.19 2016/04/28 17:05:59 jsing Exp $ */
+/* $OpenBSD: tls_server.c,v 1.20 2016/08/01 17:32:19 jsing Exp $ */
/*
* Copyright (c) 2014 Joel Sing <jsing@openbsd.org>
*
return (conn_ctx);
}
+static int
+tls_server_alpn_cb(SSL *ssl, const unsigned char **out, unsigned char *outlen,
+ const unsigned char *in, unsigned int inlen, void *arg)
+{
+ struct tls *ctx = arg;
+
+ if (SSL_select_next_proto((unsigned char**)out, outlen,
+ ctx->config->alpn, ctx->config->alpn_len, in, inlen) ==
+ OPENSSL_NPN_NEGOTIATED)
+ return (SSL_TLSEXT_ERR_OK);
+
+ return (SSL_TLSEXT_ERR_NOACK);
+}
+
int
tls_configure_server(struct tls *ctx)
{
goto err;
}
+ if (ctx->config->alpn != NULL)
+ SSL_CTX_set_alpn_select_cb(ctx->ssl_ctx, tls_server_alpn_cb,
+ ctx);
+
if (ctx->config->dheparams == -1)
SSL_CTX_set_dh_auto(ctx->ssl_ctx, 1);
else if (ctx->config->dheparams == 1024)
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