Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libtls/tls_server.c	Lines:	82	215	38.1 %
Date:	2017-11-13	Branches:	38	130	29.2 %


/* $OpenBSD: tls_server.c,v 1.42 2017/09/20 17:05:17 jsing Exp $ */
/*
 * Copyright (c) 2014 Joel Sing <jsing@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/socket.h>

#include <arpa/inet.h>

#include <openssl/ec.h>
#include <openssl/err.h>
#include <openssl/ssl.h>

#include <tls.h>
#include "tls_internal.h"

struct tls *
tls_server(void)
{
	struct tls *ctx;

	if ((ctx = tls_new()) == NULL)
		return (NULL);

	ctx->flags |= TLS_SERVER;

	return (ctx);
}

struct tls *
tls_server_conn(struct tls *ctx)
{
	struct tls *conn_ctx;

	if ((conn_ctx = tls_new()) == NULL)
		return (NULL);

	conn_ctx->flags |= TLS_SERVER_CONN;

	ctx->config->refcount++;

	conn_ctx->config = ctx->config;
	conn_ctx->keypair = ctx->config->keypair;

	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);
}

static int
tls_servername_cb(SSL *ssl, int *al, void *arg)
{
	struct tls *ctx = (struct tls *)arg;
	struct tls_sni_ctx *sni_ctx;
	union tls_addr addrbuf;
	struct tls *conn_ctx;
	const char *name;
	int match;

	if ((conn_ctx = SSL_get_app_data(ssl)) == NULL)
		goto err;

	if ((name = SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name)) ==
	    NULL) {
		/*
		 * The servername callback gets called even when there is no
		 * TLS servername extension provided by the client. Sigh!
		 */
		return (SSL_TLSEXT_ERR_NOACK);
	}

	/*
	 * Per RFC 6066 section 3: ensure that name is not an IP literal.
	 *
	 * While we should treat this as an error, a number of clients
	 * (Python, Ruby and Safari) are not RFC compliant. To avoid handshake
	 * failures, pretend that we did not receive the extension.
	 */
	if (inet_pton(AF_INET, name, &addrbuf) == 1 ||
            inet_pton(AF_INET6, name, &addrbuf) == 1)
		return (SSL_TLSEXT_ERR_NOACK);

	free((char *)conn_ctx->servername);
	if ((conn_ctx->servername = strdup(name)) == NULL)
		goto err;

	/* Find appropriate SSL context for requested servername. */
	for (sni_ctx = ctx->sni_ctx; sni_ctx != NULL; sni_ctx = sni_ctx->next) {
		if (tls_check_name(ctx, sni_ctx->ssl_cert, name,
		    &match) == -1)
			goto err;
		if (match) {
			conn_ctx->keypair = sni_ctx->keypair;
			SSL_set_SSL_CTX(conn_ctx->ssl_conn, sni_ctx->ssl_ctx);
			return (SSL_TLSEXT_ERR_OK);
		}
	}

	/* No match, use the existing context/certificate. */
	return (SSL_TLSEXT_ERR_OK);

 err:
	/*
	 * There is no way to tell libssl that an internal failure occurred.
	 * The only option we have is to return a fatal alert.
	 */
	*al = TLS1_AD_INTERNAL_ERROR;
	return (SSL_TLSEXT_ERR_ALERT_FATAL);
}

static struct tls_ticket_key *
tls_server_ticket_key(struct tls_config *config, unsigned char *keyname)
{
	struct tls_ticket_key *key = NULL;
	time_t now;
	int i;

	now = time(NULL);
	if (config->ticket_autorekey == 1) {
		if (now - 3 * (config->session_lifetime / 4) >
		    config->ticket_keys[0].time) {
			if (tls_config_ticket_autorekey(config) == -1)
				return (NULL);
		}
	}
	for (i = 0; i < TLS_NUM_TICKETS; i++) {
		struct tls_ticket_key *tk = &config->ticket_keys[i];
		if (now - config->session_lifetime > tk->time)
			continue;
		if (keyname == NULL || timingsafe_memcmp(keyname,
		    tk->key_name, sizeof(tk->key_name)) == 0) {
			key = tk;
			break;
		}
	}
	return (key);
}

static int
tls_server_ticket_cb(SSL *ssl, unsigned char *keyname, unsigned char *iv,
    EVP_CIPHER_CTX *ctx, HMAC_CTX *hctx, int mode)
{
	struct tls_ticket_key *key;
	struct tls *tls_ctx;

	if ((tls_ctx = SSL_get_app_data(ssl)) == NULL)
		return (-1);

	if (mode == 1) {
		/* create new session */
		key = tls_server_ticket_key(tls_ctx->config, NULL);
		if (key == NULL) {
			tls_set_errorx(tls_ctx, "no valid ticket key found");
			return (-1);
		}

		memcpy(keyname, key->key_name, sizeof(key->key_name));
		arc4random_buf(iv, EVP_MAX_IV_LENGTH);
		EVP_EncryptInit_ex(ctx, EVP_aes_256_cbc(), NULL,
		    key->aes_key, iv);
		HMAC_Init_ex(hctx, key->hmac_key, sizeof(key->hmac_key),
		    EVP_sha256(), NULL);
		return (0);
	} else {
		/* get key by name */
		key = tls_server_ticket_key(tls_ctx->config, keyname);
		if (key == NULL)
			return (0);

		EVP_DecryptInit_ex(ctx, EVP_aes_256_cbc(), NULL,
		    key->aes_key, iv);
		HMAC_Init_ex(hctx, key->hmac_key, sizeof(key->hmac_key),
		    EVP_sha256(), NULL);

		/* time to renew the ticket? is it the primary key? */
		if (key != &tls_ctx->config->ticket_keys[0])
			return (2);
		return (1);
	}
}

static int
tls_keypair_load_cert(struct tls_keypair *keypair, struct tls_error *error,
    X509 **cert)
{
	char *errstr = "unknown";
	BIO *cert_bio = NULL;
	int ssl_err;
	int rv = -1;

	X509_free(*cert);
	*cert = NULL;

	if (keypair->cert_mem == NULL) {
		tls_error_set(error, "keypair has no certificate");
		goto err;
	}
	if ((cert_bio = BIO_new_mem_buf(keypair->cert_mem,
	    keypair->cert_len)) == NULL) {
		tls_error_set(error, "failed to create certificate bio");
		goto err;
	}
	if ((*cert = PEM_read_bio_X509(cert_bio, NULL, tls_password_cb,
	    NULL)) == NULL) {
		if ((ssl_err = ERR_peek_error()) != 0)
		    errstr = ERR_error_string(ssl_err, NULL);
		tls_error_set(error, "failed to load certificate: %s", errstr);
		goto err;
	}

	rv = 0;

 err:
	BIO_free(cert_bio);

	return (rv);
}

static int
tls_configure_server_ssl(struct tls *ctx, SSL_CTX **ssl_ctx,
    struct tls_keypair *keypair)
{
	SSL_CTX_free(*ssl_ctx);

	if ((*ssl_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL) {
		tls_set_errorx(ctx, "ssl context failure");
		goto err;
	}

	SSL_CTX_set_options(*ssl_ctx, SSL_OP_NO_CLIENT_RENEGOTIATION);

	if (SSL_CTX_set_tlsext_servername_callback(*ssl_ctx,
	    tls_servername_cb) != 1) {
		tls_set_error(ctx, "failed to set servername callback");
		goto err;
	}
	if (SSL_CTX_set_tlsext_servername_arg(*ssl_ctx, ctx) != 1) {
		tls_set_error(ctx, "failed to set servername callback arg");
		goto err;
	}

	if (tls_configure_ssl(ctx, *ssl_ctx) != 0)
		goto err;
	if (tls_configure_ssl_keypair(ctx, *ssl_ctx, keypair, 1) != 0)
		goto err;
	if (ctx->config->verify_client != 0) {
		int verify = SSL_VERIFY_PEER;
		if (ctx->config->verify_client == 1)
			verify |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
		if (tls_configure_ssl_verify(ctx, *ssl_ctx, verify) == -1)
			goto err;
	}

	if (ctx->config->alpn != NULL)
		SSL_CTX_set_alpn_select_cb(*ssl_ctx, tls_server_alpn_cb,
		    ctx);

	if (ctx->config->dheparams == -1)
		SSL_CTX_set_dh_auto(*ssl_ctx, 1);
	else if (ctx->config->dheparams == 1024)
		SSL_CTX_set_dh_auto(*ssl_ctx, 2);

	if (ctx->config->ecdhecurves != NULL) {
		SSL_CTX_set_ecdh_auto(*ssl_ctx, 1);
		if (SSL_CTX_set1_groups(*ssl_ctx, ctx->config->ecdhecurves,
		    ctx->config->ecdhecurves_len) != 1) {
			tls_set_errorx(ctx, "failed to set ecdhe curves");
			goto err;
		}
	}

	if (ctx->config->ciphers_server == 1)
		SSL_CTX_set_options(*ssl_ctx, SSL_OP_CIPHER_SERVER_PREFERENCE);

	if (SSL_CTX_set_tlsext_status_cb(*ssl_ctx, tls_ocsp_stapling_cb) != 1) {
		tls_set_errorx(ctx, "failed to add OCSP stapling callback");
		goto err;
	}

	if (ctx->config->session_lifetime > 0) {
		/* set the session lifetime and enable tickets */
		SSL_CTX_set_timeout(*ssl_ctx, ctx->config->session_lifetime);
		SSL_CTX_clear_options(*ssl_ctx, SSL_OP_NO_TICKET);
		if (!SSL_CTX_set_tlsext_ticket_key_cb(*ssl_ctx,
		    tls_server_ticket_cb)) {
			tls_set_error(ctx,
			    "failed to set the TLS ticket callback");
			goto err;
		}
	}

	if (SSL_CTX_set_session_id_context(*ssl_ctx, ctx->config->session_id,
	    sizeof(ctx->config->session_id)) != 1) {
		tls_set_error(ctx, "failed to set session id context");
		goto err;
	}

	return (0);

  err:
	SSL_CTX_free(*ssl_ctx);
	*ssl_ctx = NULL;

	return (-1);
}

static int
tls_configure_server_sni(struct tls *ctx)
{
	struct tls_sni_ctx **sni_ctx;
	struct tls_keypair *kp;

	if (ctx->config->keypair->next == NULL)
		return (0);

	/* Set up additional SSL contexts for SNI. */
	sni_ctx = &ctx->sni_ctx;
	for (kp = ctx->config->keypair->next; kp != NULL; kp = kp->next) {
		if ((*sni_ctx = tls_sni_ctx_new()) == NULL) {
			tls_set_errorx(ctx, "out of memory");
			goto err;
		}
		(*sni_ctx)->keypair = kp;
		if (tls_configure_server_ssl(ctx, &(*sni_ctx)->ssl_ctx, kp) == -1)
			goto err;
		if (tls_keypair_load_cert(kp, &ctx->error,
		    &(*sni_ctx)->ssl_cert) == -1)
			goto err;
		sni_ctx = &(*sni_ctx)->next;
	}

	return (0);

 err:
	return (-1);
}

int
tls_configure_server(struct tls *ctx)
{
	if (tls_configure_server_ssl(ctx, &ctx->ssl_ctx,
	    ctx->config->keypair) == -1)
		goto err;
	if (tls_configure_server_sni(ctx) == -1)
		goto err;

	return (0);

 err:
	return (-1);
}

static struct tls *
tls_accept_common(struct tls *ctx)
{
	struct tls *conn_ctx = NULL;

	if ((ctx->flags & TLS_SERVER) == 0) {
		tls_set_errorx(ctx, "not a server context");
		goto err;
	}

	if ((conn_ctx = tls_server_conn(ctx)) == NULL) {
		tls_set_errorx(ctx, "connection context failure");
		goto err;
	}

	if ((conn_ctx->ssl_conn = SSL_new(ctx->ssl_ctx)) == NULL) {
		tls_set_errorx(ctx, "ssl failure");
		goto err;
	}

	if (SSL_set_app_data(conn_ctx->ssl_conn, conn_ctx) != 1) {
		tls_set_errorx(ctx, "ssl application data failure");
		goto err;
	}

	return conn_ctx;

 err:
	tls_free(conn_ctx);

	return (NULL);
}

int
tls_accept_socket(struct tls *ctx, struct tls **cctx, int s)
{
	return (tls_accept_fds(ctx, cctx, s, s));
}

int
tls_accept_fds(struct tls *ctx, struct tls **cctx, int fd_read, int fd_write)
{
	struct tls *conn_ctx;

	if ((conn_ctx = tls_accept_common(ctx)) == NULL)
		goto err;

	if (SSL_set_rfd(conn_ctx->ssl_conn, fd_read) != 1 ||
	    SSL_set_wfd(conn_ctx->ssl_conn, fd_write) != 1) {
		tls_set_errorx(ctx, "ssl file descriptor failure");
		goto err;
	}

	*cctx = conn_ctx;

	return (0);
 err:
	tls_free(conn_ctx);
	*cctx = NULL;

	return (-1);
}

int
tls_accept_cbs(struct tls *ctx, struct tls **cctx,
    tls_read_cb read_cb, tls_write_cb write_cb, void *cb_arg)
{
	struct tls *conn_ctx;

	if ((conn_ctx = tls_accept_common(ctx)) == NULL)
		goto err;

	if (tls_set_cbs(conn_ctx, read_cb, write_cb, cb_arg) != 0)
		goto err;

	*cctx = conn_ctx;

	return (0);
 err:
	tls_free(conn_ctx);
	*cctx = NULL;

	return (-1);
}

int
tls_handshake_server(struct tls *ctx)
{
	int ssl_ret;
	int rv = -1;

	if ((ctx->flags & TLS_SERVER_CONN) == 0) {
		tls_set_errorx(ctx, "not a server connection context");
		goto err;
	}

	ctx->state |= TLS_SSL_NEEDS_SHUTDOWN;

	ERR_clear_error();
	if ((ssl_ret = SSL_accept(ctx->ssl_conn)) != 1) {
		rv = tls_ssl_error(ctx, ctx->ssl_conn, ssl_ret, "handshake");
		goto err;
	}

	ctx->state |= TLS_HANDSHAKE_COMPLETE;
	rv = 0;

 err:
	return (rv);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: tls_server.c,v 1.42 2017/09/20 17:05:17 jsing Exp $ */
2			/*
3			* Copyright (c) 2014 Joel Sing <jsing@openbsd.org>
4			*
5			* Permission to use, copy, modify, and distribute this software for any
6			* purpose with or without fee is hereby granted, provided that the above
7			* copyright notice and this permission notice appear in all copies.
8			*
9			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16			*/
17
18			#include <sys/socket.h>
19
20			#include <arpa/inet.h>
21
22			#include <openssl/ec.h>
23			#include <openssl/err.h>
24			#include <openssl/ssl.h>
25
26			#include <tls.h>
27			#include "tls_internal.h"
28
29			struct tls *
30			tls_server(void)
31			{
32			struct tls *ctx;
33
34	✗✓	12	if ((ctx = tls_new()) == NULL)
35			return (NULL);
36
37		6	ctx->flags \|= TLS_SERVER;
38
39		6	return (ctx);
40		6	}
41
42			struct tls *
43			tls_server_conn(struct tls *ctx)
44			{
45			struct tls *conn_ctx;
46
47	✗✓	24	if ((conn_ctx = tls_new()) == NULL)
48			return (NULL);
49
50		12	conn_ctx->flags \|= TLS_SERVER_CONN;
51
52		12	ctx->config->refcount++;
53
54		12	conn_ctx->config = ctx->config;
55		12	conn_ctx->keypair = ctx->config->keypair;
56
57		12	return (conn_ctx);
58		12	}
59
60			static int
61			tls_server_alpn_cb(SSL ssl, const unsigned char out, unsigned char outlen,
62			const unsigned char in, unsigned int inlen, void arg)
63			{
64			struct tls *ctx = arg;
65
66			if (SSL_select_next_proto((unsigned char**)out, outlen,
67			ctx->config->alpn, ctx->config->alpn_len, in, inlen) ==
68			OPENSSL_NPN_NEGOTIATED)
69			return (SSL_TLSEXT_ERR_OK);
70
71			return (SSL_TLSEXT_ERR_NOACK);
72			}
73
74			static int
75			tls_servername_cb(SSL ssl, int al, void *arg)
76			{
77		24	struct tls ctx = (struct tls )arg;
78			struct tls_sni_ctx *sni_ctx;
79		12	union tls_addr addrbuf;
80			struct tls *conn_ctx;
81			const char *name;
82		12	int match;
83
84	✓✗	12	if ((conn_ctx = SSL_get_app_data(ssl)) == NULL)
85			goto err;
86
87	✗✓	12	if ((name = SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name)) ==
88			NULL) {
89			/*
90			* The servername callback gets called even when there is no
91			* TLS servername extension provided by the client. Sigh!
92			*/
93			return (SSL_TLSEXT_ERR_NOACK);
94			}
95
96			/*
97			* Per RFC 6066 section 3: ensure that name is not an IP literal.
98			*
99			* While we should treat this as an error, a number of clients
100			* (Python, Ruby and Safari) are not RFC compliant. To avoid handshake
101			* failures, pretend that we did not receive the extension.
102			*/
103	✓✗✗✓	24	if (inet_pton(AF_INET, name, &addrbuf) == 1 \|\|
104		12	inet_pton(AF_INET6, name, &addrbuf) == 1)
105			return (SSL_TLSEXT_ERR_NOACK);
106
107		12	free((char *)conn_ctx->servername);
108	✓✗	12	if ((conn_ctx->servername = strdup(name)) == NULL)
109			goto err;
110
111			/* Find appropriate SSL context for requested servername. */
112	✗✓	24	for (sni_ctx = ctx->sni_ctx; sni_ctx != NULL; sni_ctx = sni_ctx->next) {
113			if (tls_check_name(ctx, sni_ctx->ssl_cert, name,
114			&match) == -1)
115			goto err;
116			if (match) {
117			conn_ctx->keypair = sni_ctx->keypair;
118			SSL_set_SSL_CTX(conn_ctx->ssl_conn, sni_ctx->ssl_ctx);
119			return (SSL_TLSEXT_ERR_OK);
120			}
121			}
122
123			/* No match, use the existing context/certificate. */
124		12	return (SSL_TLSEXT_ERR_OK);
125
126			err:
127			/*
128			* There is no way to tell libssl that an internal failure occurred.
129			* The only option we have is to return a fatal alert.
130			*/
131			*al = TLS1_AD_INTERNAL_ERROR;
132			return (SSL_TLSEXT_ERR_ALERT_FATAL);
133		12	}
134
135			static struct tls_ticket_key *
136			tls_server_ticket_key(struct tls_config config, unsigned char keyname)
137			{
138			struct tls_ticket_key *key = NULL;
139			time_t now;
140			int i;
141
142			now = time(NULL);
143			if (config->ticket_autorekey == 1) {
144			if (now - 3 * (config->session_lifetime / 4) >
145			config->ticket_keys[0].time) {
146			if (tls_config_ticket_autorekey(config) == -1)
147			return (NULL);
148			}
149			}
150			for (i = 0; i < TLS_NUM_TICKETS; i++) {
151			struct tls_ticket_key *tk = &config->ticket_keys[i];
152			if (now - config->session_lifetime > tk->time)
153			continue;
154			if (keyname == NULL \|\| timingsafe_memcmp(keyname,
155			tk->key_name, sizeof(tk->key_name)) == 0) {
156			key = tk;
157			break;
158			}
159			}
160			return (key);
161			}
162
163			static int
164			tls_server_ticket_cb(SSL ssl, unsigned char keyname, unsigned char *iv,
165			EVP_CIPHER_CTX ctx, HMAC_CTX hctx, int mode)
166			{
167			struct tls_ticket_key *key;
168			struct tls *tls_ctx;
169
170			if ((tls_ctx = SSL_get_app_data(ssl)) == NULL)
171			return (-1);
172
173			if (mode == 1) {
174			/* create new session */
175			key = tls_server_ticket_key(tls_ctx->config, NULL);
176			if (key == NULL) {
177			tls_set_errorx(tls_ctx, "no valid ticket key found");
178			return (-1);
179			}
180
181			memcpy(keyname, key->key_name, sizeof(key->key_name));
182			arc4random_buf(iv, EVP_MAX_IV_LENGTH);
183			EVP_EncryptInit_ex(ctx, EVP_aes_256_cbc(), NULL,
184			key->aes_key, iv);
185			HMAC_Init_ex(hctx, key->hmac_key, sizeof(key->hmac_key),
186			EVP_sha256(), NULL);
187			return (0);
188			} else {
189			/* get key by name */
190			key = tls_server_ticket_key(tls_ctx->config, keyname);
191			if (key == NULL)
192			return (0);
193
194			EVP_DecryptInit_ex(ctx, EVP_aes_256_cbc(), NULL,
195			key->aes_key, iv);
196			HMAC_Init_ex(hctx, key->hmac_key, sizeof(key->hmac_key),
197			EVP_sha256(), NULL);
198
199			/* time to renew the ticket? is it the primary key? */
200			if (key != &tls_ctx->config->ticket_keys[0])
201			return (2);
202			return (1);
203			}
204			}
205
206			static int
207			tls_keypair_load_cert(struct tls_keypair keypair, struct tls_error error,
208			X509 **cert)
209			{
210			char *errstr = "unknown";
211			BIO *cert_bio = NULL;
212			int ssl_err;
213			int rv = -1;
214
215			X509_free(*cert);
216			*cert = NULL;
217
218			if (keypair->cert_mem == NULL) {
219			tls_error_set(error, "keypair has no certificate");
220			goto err;
221			}
222			if ((cert_bio = BIO_new_mem_buf(keypair->cert_mem,
223			keypair->cert_len)) == NULL) {
224			tls_error_set(error, "failed to create certificate bio");
225			goto err;
226			}
227			if ((*cert = PEM_read_bio_X509(cert_bio, NULL, tls_password_cb,
228			NULL)) == NULL) {
229			if ((ssl_err = ERR_peek_error()) != 0)
230			errstr = ERR_error_string(ssl_err, NULL);
231			tls_error_set(error, "failed to load certificate: %s", errstr);
232			goto err;
233			}
234
235			rv = 0;
236
237			err:
238			BIO_free(cert_bio);
239
240			return (rv);
241			}
242
243			static int
244			tls_configure_server_ssl(struct tls ctx, SSL_CTX *ssl_ctx,
245			struct tls_keypair *keypair)
246			{
247		24	SSL_CTX_free(*ssl_ctx);
248
249	✗✓	12	if ((*ssl_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL) {
250			tls_set_errorx(ctx, "ssl context failure");
251			goto err;
252			}
253
254		12	SSL_CTX_set_options(*ssl_ctx, SSL_OP_NO_CLIENT_RENEGOTIATION);
255
256	✗✓	24	if (SSL_CTX_set_tlsext_servername_callback(*ssl_ctx,
257		12	tls_servername_cb) != 1) {
258			tls_set_error(ctx, "failed to set servername callback");
259			goto err;
260			}
261	✗✓	12	if (SSL_CTX_set_tlsext_servername_arg(*ssl_ctx, ctx) != 1) {
262			tls_set_error(ctx, "failed to set servername callback arg");
263			goto err;
264			}
265
266	✓✗	12	if (tls_configure_ssl(ctx, *ssl_ctx) != 0)
267			goto err;
268	✓✗	12	if (tls_configure_ssl_keypair(ctx, *ssl_ctx, keypair, 1) != 0)
269			goto err;
270	✗✓	12	if (ctx->config->verify_client != 0) {
271			int verify = SSL_VERIFY_PEER;
272			if (ctx->config->verify_client == 1)
273			verify \|= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
274			if (tls_configure_ssl_verify(ctx, *ssl_ctx, verify) == -1)
275			goto err;
276			}
277
278	✗✓	12	if (ctx->config->alpn != NULL)
279			SSL_CTX_set_alpn_select_cb(*ssl_ctx, tls_server_alpn_cb,
280			ctx);
281
282	✗✓	12	if (ctx->config->dheparams == -1)
283			SSL_CTX_set_dh_auto(*ssl_ctx, 1);
284	✗✓	12	else if (ctx->config->dheparams == 1024)
285			SSL_CTX_set_dh_auto(*ssl_ctx, 2);
286
287	✓✗	12	if (ctx->config->ecdhecurves != NULL) {
288		12	SSL_CTX_set_ecdh_auto(*ssl_ctx, 1);
289	✗✓	36	if (SSL_CTX_set1_groups(*ssl_ctx, ctx->config->ecdhecurves,
290		24	ctx->config->ecdhecurves_len) != 1) {
291			tls_set_errorx(ctx, "failed to set ecdhe curves");
292			goto err;
293			}
294			}
295
296	✓✗	12	if (ctx->config->ciphers_server == 1)
297		12	SSL_CTX_set_options(*ssl_ctx, SSL_OP_CIPHER_SERVER_PREFERENCE);
298
299	✗✓	12	if (SSL_CTX_set_tlsext_status_cb(*ssl_ctx, tls_ocsp_stapling_cb) != 1) {
300			tls_set_errorx(ctx, "failed to add OCSP stapling callback");
301			goto err;
302			}
303
304	✗✓	12	if (ctx->config->session_lifetime > 0) {
305			/* set the session lifetime and enable tickets */
306			SSL_CTX_set_timeout(*ssl_ctx, ctx->config->session_lifetime);
307			SSL_CTX_clear_options(*ssl_ctx, SSL_OP_NO_TICKET);
308			if (!SSL_CTX_set_tlsext_ticket_key_cb(*ssl_ctx,
309			tls_server_ticket_cb)) {
310			tls_set_error(ctx,
311			"failed to set the TLS ticket callback");
312			goto err;
313			}
314			}
315
316	✗✓	24	if (SSL_CTX_set_session_id_context(*ssl_ctx, ctx->config->session_id,
317		12	sizeof(ctx->config->session_id)) != 1) {
318			tls_set_error(ctx, "failed to set session id context");
319			goto err;
320			}
321
322		12	return (0);
323
324			err:
325			SSL_CTX_free(*ssl_ctx);
326			*ssl_ctx = NULL;
327
328			return (-1);
329		12	}
330
331			static int
332			tls_configure_server_sni(struct tls *ctx)
333			{
334			struct tls_sni_ctx **sni_ctx;
335			struct tls_keypair *kp;
336
337	✓✗	24	if (ctx->config->keypair->next == NULL)
338		12	return (0);
339
340			/* Set up additional SSL contexts for SNI. */
341			sni_ctx = &ctx->sni_ctx;
342			for (kp = ctx->config->keypair->next; kp != NULL; kp = kp->next) {
343			if ((*sni_ctx = tls_sni_ctx_new()) == NULL) {
344			tls_set_errorx(ctx, "out of memory");
345			goto err;
346			}
347			(*sni_ctx)->keypair = kp;
348			if (tls_configure_server_ssl(ctx, &(*sni_ctx)->ssl_ctx, kp) == -1)
349			goto err;
350			if (tls_keypair_load_cert(kp, &ctx->error,
351			&(*sni_ctx)->ssl_cert) == -1)
352			goto err;
353			sni_ctx = &(*sni_ctx)->next;
354			}
355
356			return (0);
357
358			err:
359			return (-1);
360		12	}
361
362			int
363			tls_configure_server(struct tls *ctx)
364			{
365	✓✗	48	if (tls_configure_server_ssl(ctx, &ctx->ssl_ctx,
366		24	ctx->config->keypair) == -1)
367			goto err;
368	✓✗	12	if (tls_configure_server_sni(ctx) == -1)
369			goto err;
370
371		12	return (0);
372
373			err:
374			return (-1);
375		12	}
376
377			static struct tls *
378			tls_accept_common(struct tls *ctx)
379			{
380			struct tls *conn_ctx = NULL;
381
382	✗✓	24	if ((ctx->flags & TLS_SERVER) == 0) {
383			tls_set_errorx(ctx, "not a server context");
384			goto err;
385			}
386
387	✗✓	12	if ((conn_ctx = tls_server_conn(ctx)) == NULL) {
388			tls_set_errorx(ctx, "connection context failure");
389			goto err;
390			}
391
392	✗✓	12	if ((conn_ctx->ssl_conn = SSL_new(ctx->ssl_ctx)) == NULL) {
393			tls_set_errorx(ctx, "ssl failure");
394			goto err;
395			}
396
397	✗✓	12	if (SSL_set_app_data(conn_ctx->ssl_conn, conn_ctx) != 1) {
398			tls_set_errorx(ctx, "ssl application data failure");
399			goto err;
400			}
401
402		12	return conn_ctx;
403
404			err:
405			tls_free(conn_ctx);
406
407			return (NULL);
408		12	}
409
410			int
411			tls_accept_socket(struct tls ctx, struct tls *cctx, int s)
412			{
413		6	return (tls_accept_fds(ctx, cctx, s, s));
414			}
415
416			int
417			tls_accept_fds(struct tls ctx, struct tls *cctx, int fd_read, int fd_write)
418			{
419			struct tls *conn_ctx;
420
421	✓✗	12	if ((conn_ctx = tls_accept_common(ctx)) == NULL)
422			goto err;
423
424	✓✗✗✓	12	if (SSL_set_rfd(conn_ctx->ssl_conn, fd_read) != 1 \|\|
425		6	SSL_set_wfd(conn_ctx->ssl_conn, fd_write) != 1) {
426			tls_set_errorx(ctx, "ssl file descriptor failure");
427			goto err;
428			}
429
430		6	*cctx = conn_ctx;
431
432		6	return (0);
433			err:
434			tls_free(conn_ctx);
435			*cctx = NULL;
436
437			return (-1);
438		6	}
439
440			int
441			tls_accept_cbs(struct tls ctx, struct tls *cctx,
442			tls_read_cb read_cb, tls_write_cb write_cb, void *cb_arg)
443			{
444			struct tls *conn_ctx;
445
446	✓✗	12	if ((conn_ctx = tls_accept_common(ctx)) == NULL)
447			goto err;
448
449	✓✗	6	if (tls_set_cbs(conn_ctx, read_cb, write_cb, cb_arg) != 0)
450			goto err;
451
452		6	*cctx = conn_ctx;
453
454		6	return (0);
455			err:
456			tls_free(conn_ctx);
457			*cctx = NULL;
458
459			return (-1);
460		6	}
461
462			int
463			tls_handshake_server(struct tls *ctx)
464			{
465			int ssl_ret;
466			int rv = -1;
467
468	✗✓	72	if ((ctx->flags & TLS_SERVER_CONN) == 0) {
469			tls_set_errorx(ctx, "not a server connection context");
470			goto err;
471			}
472
473		36	ctx->state \|= TLS_SSL_NEEDS_SHUTDOWN;
474
475		36	ERR_clear_error();
476	✓✓	36	if ((ssl_ret = SSL_accept(ctx->ssl_conn)) != 1) {
477		24	rv = tls_ssl_error(ctx, ctx->ssl_conn, ssl_ret, "handshake");
478		24	goto err;
479			}
480
481		12	ctx->state \|= TLS_HANDSHAKE_COMPLETE;
482		12	rv = 0;
483
484			err:
485		36	return (rv);
486			}