X-Git-Url: https://git.openssl.org/?a=blobdiff_plain;f=apps%2Fs_client.c;h=8a57dcfc9fe961207ad495703ae5e36e536f77a7;hb=fbbabb646c707b7c18a67a2724efe1a12bae15a7;hp=f0783bcd584ab4463de3e79d8e9f60a662a52212;hpb=79bd20fd1755d0d8a6d1d758b2f8858643621923;p=openssl.git

diff --git a/apps/s_client.c b/apps/s_client.c
index f0783bcd58..8a57dcfc9f 100644
--- a/apps/s_client.c
+++ b/apps/s_client.c
@@ -163,6 +163,9 @@ typedef unsigned int u_int;
 #include <openssl/rand.h>
 #include <openssl/ocsp.h>
 #include <openssl/bn.h>
+#ifndef OPENSSL_NO_SRP
+#include <openssl/srp.h>
+#endif
 #include "s_apps.h"
 #include "timeouts.h"
 
@@ -237,7 +240,7 @@ static unsigned int psk_client_cb(SSL *ssl, const char *hint, char *identity,
 		BIO_printf(bio_c_out, "Received PSK identity hint '%s'\n", hint);
 
 	/* lookup PSK identity and PSK key based on the given identity hint here */
-	ret = BIO_snprintf(identity, max_identity_len, psk_identity);
+	ret = BIO_snprintf(identity, max_identity_len, "%s", psk_identity);
 	if (ret < 0 || (unsigned int)ret > max_identity_len)
 		goto out_err;
 	if (c_debug)
@@ -315,13 +318,21 @@ static void sc_usage(void)
 # ifndef OPENSSL_NO_JPAKE
 	BIO_printf(bio_err," -jpake arg    - JPAKE secret to use\n");
 # endif
+#endif
+#ifndef OPENSSL_NO_SRP
+	BIO_printf(bio_err," -srpuser user     - SRP authentification for 'user'\n");
+	BIO_printf(bio_err," -srppass arg      - password for 'user'\n");
+	BIO_printf(bio_err," -srp_lateuser     - SRP username into second ClientHello message\n");
+	BIO_printf(bio_err," -srp_moregroups   - Tolerate other than the known g N values.\n");
+	BIO_printf(bio_err," -srp_strength int - minimal mength in bits for N (default %d).\n",SRP_MINIMAL_N);
 #endif
 	BIO_printf(bio_err," -ssl2         - just use SSLv2\n");
 	BIO_printf(bio_err," -ssl3         - just use SSLv3\n");
+	BIO_printf(bio_err," -tls1_1       - just use TLSv1.1\n");
 	BIO_printf(bio_err," -tls1         - just use TLSv1\n");
 	BIO_printf(bio_err," -dtls1        - just use DTLSv1\n");    
-	BIO_printf(bio_err," -mtu          - set the MTU\n");
-	BIO_printf(bio_err," -no_tls1/-no_ssl3/-no_ssl2 - turn off that protocol\n");
+	BIO_printf(bio_err," -mtu          - set the link layer MTU\n");
+	BIO_printf(bio_err," -no_tls1_1/-no_tls1/-no_ssl3/-no_ssl2 - turn off that protocol\n");
 	BIO_printf(bio_err," -bugs         - Switch on all SSL implementation bug workarounds\n");
 	BIO_printf(bio_err," -serverpref   - Use server's cipher preferences (only SSLv2)\n");
 	BIO_printf(bio_err," -cipher       - preferred cipher to use, use the 'openssl ciphers'\n");
@@ -342,7 +353,11 @@ static void sc_usage(void)
 	BIO_printf(bio_err," -tlsextdebug      - hex dump of all TLS extensions received\n");
 	BIO_printf(bio_err," -status           - request certificate status from server\n");
 	BIO_printf(bio_err," -no_ticket        - disable use of RFC4507bis session tickets\n");
+# ifndef OPENSSL_NO_NEXTPROTONEG
+	BIO_printf(bio_err," -nextprotoneg arg - enable NPN extension, considering named protocols supported (comma-separated list)\n");
+# endif
 #endif
+	BIO_printf(bio_err," -legacy_renegotiation - enable use of legacy renegotiation (dangerous)\n");
 	}
 
 #ifndef OPENSSL_NO_TLSEXT
@@ -365,6 +380,146 @@ static int MS_CALLBACK ssl_servername_cb(SSL *s, int *ad, void *arg)
 	
 	return SSL_TLSEXT_ERR_OK;
 	}
+
+#ifndef OPENSSL_NO_SRP
+
+/* This is a context that we pass to all callbacks */
+typedef struct srp_arg_st
+	{
+	char *srppassin;
+	char *srplogin;
+	int msg;   /* copy from c_msg */
+	int debug; /* copy from c_debug */
+	int amp;   /* allow more groups */
+	int strength /* minimal size for N */ ;
+	} SRP_ARG;
+
+#define SRP_NUMBER_ITERATIONS_FOR_PRIME 64
+
+static int SRP_Verify_N_and_g(const BIGNUM *N, const BIGNUM *g)
+	{
+	BN_CTX *bn_ctx = BN_CTX_new();
+	BIGNUM *p = BN_new();
+	BIGNUM *r = BN_new();
+	int ret =
+		g != NULL && N != NULL && bn_ctx != NULL && BN_is_odd(N) &&
+		BN_is_prime_ex(N,SRP_NUMBER_ITERATIONS_FOR_PRIME,bn_ctx,NULL) &&
+		p != NULL && BN_rshift1(p, N) &&
+
+		/* p = (N-1)/2 */
+		BN_is_prime_ex(p,SRP_NUMBER_ITERATIONS_FOR_PRIME,bn_ctx,NULL) &&
+		r != NULL &&
+
+		/* verify g^((N-1)/2) == -1 (mod N) */
+		BN_mod_exp(r, g, p, N, bn_ctx) &&
+		BN_add_word(r, 1) &&
+		BN_cmp(r, N) == 0;
+
+	if(r)
+		BN_free(r);
+	if(p)
+		BN_free(p);
+	if(bn_ctx)
+		BN_CTX_free(bn_ctx);
+	return ret;
+	}
+
+static int MS_CALLBACK ssl_srp_verify_param_cb(SSL *s, void *arg)
+	{
+	SRP_ARG *srp_arg = (SRP_ARG *)arg;
+	BIGNUM *N = NULL, *g = NULL;
+	if (!(N = SSL_get_srp_N(s)) || !(g = SSL_get_srp_g(s)))
+		return 0;
+	if (srp_arg->debug || srp_arg->msg || srp_arg->amp == 1)
+		{
+    		BIO_printf(bio_err, "SRP parameters:\n"); 
+		BIO_printf(bio_err,"\tN="); BN_print(bio_err,N);
+		BIO_printf(bio_err,"\n\tg="); BN_print(bio_err,g);
+		BIO_printf(bio_err,"\n");
+		}
+
+	if (SRP_check_known_gN_param(g,N))
+		return 1;
+
+	if (srp_arg->amp == 1)
+		{
+		if (srp_arg->debug)
+			BIO_printf(bio_err, "SRP param N and g are not known params, going to check deeper.\n");
+
+/* The srp_moregroups must be used with caution, testing primes costs time. 
+   Implementors should rather add the value to the known ones.
+   The minimal size has already been tested.
+*/
+		if (BN_num_bits(g) <= BN_BITS && SRP_Verify_N_and_g(N,g))
+			return 1;
+		}	
+	BIO_printf(bio_err, "SRP param N and g rejected.\n");
+	return 0;
+	}
+
+#define PWD_STRLEN 1024
+
+static char * MS_CALLBACK ssl_give_srp_client_pwd_cb(SSL *s, void *arg)
+	{
+	SRP_ARG *srp_arg = (SRP_ARG *)arg;
+	char *pass = (char *)OPENSSL_malloc(PWD_STRLEN+1);
+	PW_CB_DATA cb_tmp;
+	int l;
+
+	cb_tmp.password = (char *)srp_arg->srppassin;
+	cb_tmp.prompt_info = "SRP user";
+	if ((l = password_callback(pass, PWD_STRLEN, 0, &cb_tmp))<0)
+		{
+		BIO_printf (bio_err, "Can't read Password\n");
+		OPENSSL_free(pass);
+		return NULL;
+		}
+	*(pass+l)= '\0';
+
+	return pass;
+	}
+
+static char * MS_CALLBACK missing_srp_username_callback(SSL *s, void *arg)
+	{
+	SRP_ARG *srp_arg = (SRP_ARG *)arg;
+	return BUF_strdup(srp_arg->srplogin);
+	}
+
+#endif
+
+# ifndef OPENSSL_NO_NEXTPROTONEG
+/* This the context that we pass to next_proto_cb */
+typedef struct tlsextnextprotoctx_st {
+	unsigned char *data;
+	unsigned short len;
+	int status;
+} tlsextnextprotoctx;
+
+static tlsextnextprotoctx next_proto;
+
+static int next_proto_cb(SSL *s, unsigned char **out, unsigned char *outlen, const unsigned char *in, unsigned int inlen, void *arg)
+	{
+	tlsextnextprotoctx *ctx = arg;
+
+	if (!c_quiet)
+		{
+		/* We can assume that |in| is syntactically valid. */
+		unsigned i;
+		BIO_printf(bio_c_out, "Protocols advertised by server: ");
+		for (i = 0; i < inlen; )
+			{
+			if (i)
+				BIO_write(bio_c_out, ", ", 2);
+			BIO_write(bio_c_out, &in[i + 1], in[i]);
+			i += in[i] + 1;
+			}
+		BIO_write(bio_c_out, "\n", 1);
+		}
+
+	ctx->status = SSL_select_next_proto(out, outlen, in, inlen, ctx->data, ctx->len);
+	return SSL_TLSEXT_ERR_OK;
+	}
+# endif  /* ndef OPENSSL_NO_NEXTPROTONEG */
 #endif
 
 enum
@@ -381,9 +536,8 @@ int MAIN(int, char **);
 
 int MAIN(int argc, char **argv)
 	{
-	int off=0;
+	unsigned int off=0, clr=0;
 	SSL *con=NULL;
-	X509_STORE *store = NULL;
 	int s,k,width,state=0;
 	char *cbuf=NULL,*sbuf=NULL,*mbuf=NULL;
 	int cbuf_len,cbuf_off;
@@ -404,17 +558,21 @@ int MAIN(int argc, char **argv)
 	SSL_CTX *ctx=NULL;
 	int ret=1,in_init=1,i,nbio_test=0;
 	int starttls_proto = PROTO_OFF;
-	int prexit = 0, vflags = 0;
+	int prexit = 0;
+	X509_VERIFY_PARAM *vpm = NULL;
+	int badarg = 0;
 	const SSL_METHOD *meth=NULL;
 	int socket_type=SOCK_STREAM;
 	BIO *sbio;
 	char *inrand=NULL;
 	int mbuf_len=0;
+	struct timeval timeout, *timeoutp;
 #ifndef OPENSSL_NO_ENGINE
 	char *engine_id=NULL;
 	char *ssl_client_engine_id=NULL;
-	ENGINE *e=NULL, *ssl_client_engine=NULL;
+	ENGINE *ssl_client_engine=NULL;
 #endif
+	ENGINE *e=NULL;
 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_NETWARE) || defined(OPENSSL_SYS_BEOS_R5)
 	struct timeval tv;
 #if defined(OPENSSL_SYS_BEOS_R5)
@@ -425,6 +583,9 @@ int MAIN(int argc, char **argv)
 	char *servername = NULL; 
         tlsextctx tlsextcbp = 
         {NULL,0};
+# ifndef OPENSSL_NO_NEXTPROTONEG
+	const char *next_proto_neg_in = NULL;
+# endif
 #endif
 	char *sess_in = NULL;
 	char *sess_out = NULL;
@@ -435,6 +596,11 @@ int MAIN(int argc, char **argv)
 #ifndef OPENSSL_NO_JPAKE
 	char *jpake_secret = NULL;
 #endif
+#ifndef OPENSSL_NO_SRP
+	char * srppass = NULL;
+	int srp_lateuser = 0;
+	SRP_ARG srp_arg = {NULL,NULL,0,0,0,1024};
+#endif
 
 #if !defined(OPENSSL_NO_SSL2) && !defined(OPENSSL_NO_SSL3)
 	meth=SSLv23_client_method();
@@ -520,10 +686,12 @@ int MAIN(int argc, char **argv)
 			if (--argc < 1) goto bad;
 			cert_format = str2fmt(*(++argv));
 			}
-		else if	(strcmp(*argv,"-crl_check") == 0)
-			vflags |= X509_V_FLAG_CRL_CHECK;
-		else if	(strcmp(*argv,"-crl_check_all") == 0)
-			vflags |= X509_V_FLAG_CRL_CHECK|X509_V_FLAG_CRL_CHECK_ALL;
+		else if (args_verify(&argv, &argc, &badarg, bio_err, &vpm))
+			{
+			if (badarg)
+				goto bad;
+			continue;
+			}
 		else if (strcmp(*argv,"-verify_return_error") == 0)
 			verify_return_error = 1;
 		else if	(strcmp(*argv,"-prexit") == 0)
@@ -582,6 +750,37 @@ int MAIN(int argc, char **argv)
                                 }
 			}
 #endif
+#ifndef OPENSSL_NO_SRP
+		else if (strcmp(*argv,"-srpuser") == 0)
+			{
+			if (--argc < 1) goto bad;
+			srp_arg.srplogin= *(++argv);
+			meth=TLSv1_client_method();
+			}
+		else if (strcmp(*argv,"-srppass") == 0)
+			{
+			if (--argc < 1) goto bad;
+			srppass= *(++argv);
+			meth=TLSv1_client_method();
+			}
+		else if (strcmp(*argv,"-srp_strength") == 0)
+			{
+			if (--argc < 1) goto bad;
+			srp_arg.strength=atoi(*(++argv));
+			BIO_printf(bio_err,"SRP minimal length for N is %d\n",srp_arg.strength);
+			meth=TLSv1_client_method();
+			}
+		else if (strcmp(*argv,"-srp_lateuser") == 0)
+			{
+			srp_lateuser= 1;
+			meth=TLSv1_client_method();
+			}
+		else if	(strcmp(*argv,"-srp_moregroups") == 0)
+			{
+			srp_arg.amp=1;
+			meth=TLSv1_client_method();
+			}
+#endif
 #ifndef OPENSSL_NO_SSL2
 		else if	(strcmp(*argv,"-ssl2") == 0)
 			meth=SSLv2_client_method();
@@ -591,6 +790,8 @@ int MAIN(int argc, char **argv)
 			meth=SSLv3_client_method();
 #endif
 #ifndef OPENSSL_NO_TLS1
+		else if	(strcmp(*argv,"-tls1_1") == 0)
+			meth=TLSv1_1_client_method();
 		else if	(strcmp(*argv,"-tls1") == 0)
 			meth=TLSv1_client_method();
 #endif
@@ -639,6 +840,8 @@ int MAIN(int argc, char **argv)
 			if (--argc < 1) goto bad;
 			CAfile= *(++argv);
 			}
+		else if (strcmp(*argv,"-no_tls1_1") == 0)
+			off|=SSL_OP_NO_TLSv1_1;
 		else if (strcmp(*argv,"-no_tls1") == 0)
 			off|=SSL_OP_NO_TLSv1;
 		else if (strcmp(*argv,"-no_ssl3") == 0)
@@ -650,9 +853,22 @@ int MAIN(int argc, char **argv)
 #ifndef OPENSSL_NO_TLSEXT
 		else if	(strcmp(*argv,"-no_ticket") == 0)
 			{ off|=SSL_OP_NO_TICKET; }
+# ifndef OPENSSL_NO_NEXTPROTONEG
+		else if (strcmp(*argv,"-nextprotoneg") == 0)
+			{
+			if (--argc < 1) goto bad;
+			next_proto_neg_in = *(++argv);
+			}
+# endif
 #endif
 		else if (strcmp(*argv,"-serverpref") == 0)
 			off|=SSL_OP_CIPHER_SERVER_PREFERENCE;
+		else if (strcmp(*argv,"-legacy_renegotiation") == 0)
+			off|=SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION;
+		else if	(strcmp(*argv,"-legacy_server_connect") == 0)
+			{ off|=SSL_OP_LEGACY_SERVER_CONNECT; }
+		else if	(strcmp(*argv,"-no_legacy_server_connect") == 0)
+			{ clr|=SSL_OP_LEGACY_SERVER_CONNECT; }
 		else if	(strcmp(*argv,"-cipher") == 0)
 			{
 			if (--argc < 1) goto bad;
@@ -750,6 +966,21 @@ bad:
 	OpenSSL_add_ssl_algorithms();
 	SSL_load_error_strings();
 
+#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
+	next_proto.status = -1;
+	if (next_proto_neg_in)
+		{
+		next_proto.data = next_protos_parse(&next_proto.len, next_proto_neg_in);
+		if (next_proto.data == NULL)
+			{
+			BIO_printf(bio_err, "Error parsing -nextprotoneg argument\n");
+			goto end;
+			}
+		}
+	else
+		next_proto.data = NULL;
+#endif
+
 #ifndef OPENSSL_NO_ENGINE
         e = setup_engine(bio_err, engine_id, 1);
 	if (ssl_client_engine_id)
@@ -823,6 +1054,14 @@ bad:
 			}
 		}
 
+#ifndef OPENSSL_NO_SRP
+	if(!app_passwd(bio_err, srppass, NULL, &srp_arg.srppassin, NULL))
+		{
+		BIO_printf(bio_err, "Error getting password\n");
+		goto end;
+		}
+#endif
+
 	ctx=SSL_CTX_new(meth);
 	if (ctx == NULL)
 		{
@@ -830,6 +1069,9 @@ bad:
 		goto end;
 		}
 
+	if (vpm)
+		SSL_CTX_set1_param(ctx, vpm);
+
 #ifndef OPENSSL_NO_ENGINE
 	if (ssl_client_engine)
 		{
@@ -860,11 +1102,19 @@ bad:
 		SSL_CTX_set_options(ctx,SSL_OP_ALL|off);
 	else
 		SSL_CTX_set_options(ctx,off);
+
+	if (clr)
+		SSL_CTX_clear_options(ctx, clr);
 	/* DTLS: partial reads end up discarding unread UDP bytes :-( 
 	 * Setting read ahead solves this problem.
 	 */
 	if (socket_type == SOCK_DGRAM) SSL_CTX_set_read_ahead(ctx, 1);
 
+#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
+	if (next_proto.data)
+		SSL_CTX_set_next_proto_select_cb(ctx, next_proto_cb, &next_proto);
+#endif
+
 	if (state) SSL_CTX_set_info_callback(ctx,apps_ssl_info_callback);
 	if (cipher != NULL)
 		if(!SSL_CTX_set_cipher_list(ctx,cipher)) {
@@ -889,8 +1139,6 @@ bad:
 		/* goto end; */
 		}
 
-	store = SSL_CTX_get_cert_store(ctx);
-	X509_STORE_set_flags(store, vflags);
 #ifndef OPENSSL_NO_TLSEXT
 	if (servername != NULL)
 		{
@@ -898,6 +1146,26 @@ bad:
 		SSL_CTX_set_tlsext_servername_callback(ctx, ssl_servername_cb);
 		SSL_CTX_set_tlsext_servername_arg(ctx, &tlsextcbp);
 		}
+#ifndef OPENSSL_NO_SRP
+        if (srp_arg.srplogin)
+		{
+		if (srp_lateuser) 
+			SSL_CTX_set_srp_missing_srp_username_callback(ctx,missing_srp_username_callback);
+		else if (!SSL_CTX_set_srp_username(ctx, srp_arg.srplogin))
+			{
+			BIO_printf(bio_err,"Unable to set SRP username\n");
+			goto end;
+			}
+		srp_arg.msg = c_msg;
+		srp_arg.debug = c_debug ;
+		SSL_CTX_set_srp_cb_arg(ctx,&srp_arg);
+		SSL_CTX_set_srp_client_pwd_callback(ctx, ssl_give_srp_client_pwd_cb);
+		SSL_CTX_set_srp_strength(ctx, srp_arg.strength);
+		if (c_msg || c_debug || srp_arg.amp == 0)
+			SSL_CTX_set_srp_verify_param_callback(ctx, ssl_srp_verify_param_cb);
+		}
+
+#endif
 #endif
 
 	con=SSL_new(ctx);
@@ -974,7 +1242,6 @@ re_start:
 
 	if ( SSL_version(con) == DTLS1_VERSION)
 		{
-		struct timeval timeout;
 
 		sbio=BIO_new_dgram(s,BIO_NOCLOSE);
 		if (getsockname(s, &peer, (void *)&peerlen) < 0)
@@ -998,10 +1265,10 @@ re_start:
 			BIO_ctrl(sbio, BIO_CTRL_DGRAM_SET_SEND_TIMEOUT, 0, &timeout);
 			}
 
-		if (socket_mtu > 0)
+		if (socket_mtu > 28)
 			{
 			SSL_set_options(con, SSL_OP_NO_QUERY_MTU);
-			SSL_set_mtu(con, socket_mtu);
+			SSL_set_mtu(con, socket_mtu - 28);
 			}
 		else
 			/* want to do MTU discovery */
@@ -1191,6 +1458,12 @@ SSL_set_tlsext_status_ids(con, ids);
 		FD_ZERO(&readfds);
 		FD_ZERO(&writefds);
 
+		if ((SSL_version(con) == DTLS1_VERSION) &&
+			DTLSv1_get_timeout(con, &timeout))
+			timeoutp = &timeout;
+		else
+			timeoutp = NULL;
+
 		if (SSL_in_init(con) && !SSL_total_renegotiations(con))
 			{
 			in_init=1;
@@ -1295,7 +1568,7 @@ SSL_set_tlsext_status_ids(con, ids);
 					if(!i && (!((_kbhit()) || (WAIT_OBJECT_0 == WaitForSingleObject(GetStdHandle(STD_INPUT_HANDLE), 0))) || !read_tty) ) continue;
 #endif
 				} else 	i=select(width,(void *)&readfds,(void *)&writefds,
-					 NULL,NULL);
+					 NULL,timeoutp);
 			}
 #elif defined(OPENSSL_SYS_NETWARE)
 			if(!write_tty) {
@@ -1305,7 +1578,7 @@ SSL_set_tlsext_status_ids(con, ids);
 					i=select(width,(void *)&readfds,(void *)&writefds,
 						NULL,&tv);
 				} else 	i=select(width,(void *)&readfds,(void *)&writefds,
-					NULL,NULL);
+					NULL,timeoutp);
 			}
 #elif defined(OPENSSL_SYS_BEOS_R5)
 			/* Under BeOS-R5 the situation is similar to DOS */
@@ -1323,12 +1596,12 @@ SSL_set_tlsext_status_ids(con, ids);
 					if (!i && (stdin_set != 1 || !read_tty))
 						continue;
 				} else 	i=select(width,(void *)&readfds,(void *)&writefds,
-					 NULL,NULL);
+					 NULL,timeoutp);
 			}
 			(void)fcntl(fileno(stdin), F_SETFL, 0);
 #else
 			i=select(width,(void *)&readfds,(void *)&writefds,
-				 NULL,NULL);
+				 NULL,timeoutp);
 #endif
 			if ( i < 0)
 				{
@@ -1339,6 +1612,11 @@ SSL_set_tlsext_status_ids(con, ids);
 				}
 			}
 
+		if ((SSL_version(con) == DTLS1_VERSION) && DTLSv1_handle_timeout(con) > 0)
+			{
+			BIO_printf(bio_err,"TIMEOUT occured\n");
+			}
+
 		if (!ssl_pending && FD_ISSET(SSL_get_fd(con),&writefds))
 			{
 			k=SSL_write(con,&(cbuf[cbuf_off]),
@@ -1706,6 +1984,8 @@ static void print_stuff(BIO *bio, SSL *s, int full)
 							 EVP_PKEY_bits(pktmp));
 		EVP_PKEY_free(pktmp);
 	}
+	BIO_printf(bio, "Secure Renegotiation IS%s supported\n",
+			SSL_get_secure_renegotiation_support(s) ? "" : " NOT");
 #ifndef OPENSSL_NO_COMP
 	comp=SSL_get_current_compression(s);
 	expansion=SSL_get_current_expansion(s);
@@ -1714,6 +1994,18 @@ static void print_stuff(BIO *bio, SSL *s, int full)
 	BIO_printf(bio,"Expansion: %s\n",
 		expansion ? SSL_COMP_get_name(expansion) : "NONE");
 #endif
+
+#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
+	if (next_proto.status != -1) {
+		const unsigned char *proto;
+		unsigned int proto_len;
+		SSL_get0_next_proto_negotiated(s, &proto, &proto_len);
+		BIO_printf(bio, "Next protocol: (%d) ", next_proto.status);
+		BIO_write(bio, proto, proto_len);
+		BIO_write(bio, "\n", 1);
+	}
+#endif
+
 	SSL_SESSION_print(bio,SSL_get_session(s));
 	BIO_printf(bio,"---\n");
 	if (peer != NULL)