Fix duplicate code and typo.
[openssl.git] / apps / s_server.c
index 6f6768951908192311377f178bc5beb603aa3d33..f5d313ceb52f3fa6b0620a6f20a95ba29ced14f3 100644 (file)
@@ -201,6 +201,7 @@ typedef unsigned int u_int;
 #ifndef OPENSSL_NO_RSA
 static RSA MS_CALLBACK *tmp_rsa_cb(SSL *s, int is_export, int keylength);
 #endif
+static int not_resumable_sess_cb(SSL *s, int is_forward_secure);
 static int sv_body(char *hostname, int s, unsigned char *context);
 static int www_body(char *hostname, int s, unsigned char *context);
 static void close_accept_socket(void );
@@ -209,6 +210,8 @@ static int init_ssl_connection(SSL *s);
 static void print_stats(BIO *bp,SSL_CTX *ctx);
 static int generate_session_id(const SSL *ssl, unsigned char *id,
                                unsigned int *id_len);
+static void init_session_cache_ctx(SSL_CTX *sctx);
+static void free_sessions(void);
 #ifndef OPENSSL_NO_DH
 static DH *load_dh_param(const char *dhfile);
 static DH *get_dh512(void);
@@ -287,6 +290,7 @@ static int s_tlsextdebug=0;
 static int s_tlsextstatus=0;
 static int cert_status_cb(SSL *s, void *arg);
 #endif
+static int no_resume_ephemeral = 0;
 static int s_msg=0;
 static int s_quiet=0;
 
@@ -458,7 +462,7 @@ static void sv_usage(void)
 #endif
        BIO_printf(bio_err," -ssl2         - Just talk SSLv2\n");
        BIO_printf(bio_err," -ssl3         - Just talk SSLv3\n");
-       BIO_printf(bio_err," -tls1_1       - Just talk TLSv1_1\n");
+       BIO_printf(bio_err," -tls1_1       - Just talk TLSv1.1\n");
        BIO_printf(bio_err," -tls1         - Just talk TLSv1\n");
        BIO_printf(bio_err," -dtls1        - Just talk DTLSv1\n");
        BIO_printf(bio_err," -timeout      - Enable timeouts\n");
@@ -474,6 +478,7 @@ static void sv_usage(void)
 #ifndef OPENSSL_NO_ECDH
        BIO_printf(bio_err," -no_ecdhe     - Disable ephemeral ECDH\n");
 #endif
+       BIO_printf(bio_err, "-no_resume_ephemeral - Disable caching and tickets if ephemeral (EC)DH is used\n");
        BIO_printf(bio_err," -bugs         - Turn on SSL bug compatibility\n");
        BIO_printf(bio_err," -www          - Respond to a 'GET /' with a status page\n");
        BIO_printf(bio_err," -WWW          - Respond to a 'GET /<path> HTTP/1.0' with file ./<path>\n");
@@ -494,6 +499,9 @@ static void sv_usage(void)
        BIO_printf(bio_err," -tlsextdebug  - hex dump of all TLS extensions received\n");
        BIO_printf(bio_err," -no_ticket    - disable use of RFC4507bis session tickets\n");
        BIO_printf(bio_err," -legacy_renegotiation - enable use of legacy renegotiation (dangerous)\n");
+# ifndef OPENSSL_NO_NEXTPROTONEG
+       BIO_printf(bio_err," -nextprotoneg arg - set the advertised protocols for the NPN extension (comma-separated list)\n");
+# endif
 #endif
        }
 
@@ -828,8 +836,32 @@ BIO_printf(err, "cert_status: received %d ids\n", sk_OCSP_RESPID_num(ids));
        ret = SSL_TLSEXT_ERR_ALERT_FATAL;
        goto done;
        }
+
+# ifndef OPENSSL_NO_NEXTPROTONEG
+/* This is the context that we pass to next_proto_cb */
+typedef struct tlsextnextprotoctx_st {
+       unsigned char *data;
+       unsigned int len;
+} tlsextnextprotoctx;
+
+static int next_proto_cb(SSL *s, const unsigned char **data, unsigned int *len, void *arg)
+       {
+       tlsextnextprotoctx *next_proto = arg;
+
+       *data = next_proto->data;
+       *len = next_proto->len;
+
+       return SSL_TLSEXT_ERR_OK;
+       }
+# endif  /* ndef OPENSSL_NO_NPN */
 #endif
 
+static int not_resumable_sess_cb(SSL *s, int is_forward_secure)
+       {
+       /* disable resumption for sessions with forward secure ciphers */
+       return is_forward_secure;
+       }
+
 int MAIN(int, char **);
 
 #ifndef OPENSSL_NO_JPAKE
@@ -862,13 +894,17 @@ int MAIN(int argc, char *argv[])
        int s_dcert_format = FORMAT_PEM, s_dkey_format = FORMAT_PEM;
        X509 *s_cert = NULL, *s_dcert = NULL;
        EVP_PKEY *s_key = NULL, *s_dkey = NULL;
-       int no_cache = 0;
+       int no_cache = 0, ext_cache = 0;
 #ifndef OPENSSL_NO_TLSEXT
        EVP_PKEY *s_key2 = NULL;
        X509 *s_cert2 = NULL;
 #endif
 #ifndef OPENSSL_NO_TLSEXT
         tlsextctx tlsextcbp = {NULL, NULL, SSL_TLSEXT_ERR_ALERT_WARNING};
+# ifndef OPENSSL_NO_NEXTPROTONEG
+       const char *next_proto_neg_in = NULL;
+       tlsextnextprotoctx next_proto;
+# endif
 #endif
 #ifndef OPENSSL_NO_PSK
        /* by default do not send a PSK identity hint */
@@ -1007,6 +1043,8 @@ int MAIN(int argc, char *argv[])
                        }
                else if (strcmp(*argv,"-no_cache") == 0)
                        no_cache = 1;
+               else if (strcmp(*argv,"-ext_cache") == 0)
+                       ext_cache = 1;
                else if (args_verify(&argv, &argc, &badarg, bio_err, &vpm))
                        {
                        if (badarg)
@@ -1091,6 +1129,8 @@ int MAIN(int argc, char *argv[])
                        { no_dhe=1; }
                else if (strcmp(*argv,"-no_ecdhe") == 0)
                        { no_ecdhe=1; }
+               else if (strcmp(*argv,"-no_resume_ephemeral") == 0)
+                       { no_resume_ephemeral = 1; }
 #ifndef OPENSSL_NO_PSK
                 else if (strcmp(*argv,"-psk_hint") == 0)
                        {
@@ -1145,6 +1185,8 @@ int MAIN(int argc, char *argv[])
                        { meth=TLSv1_1_server_method(); }
                else if (strcmp(*argv,"-tls1") == 0)
                        { meth=TLSv1_server_method(); }
+               else if (strcmp(*argv,"-tls1_1") == 0)
+                       { meth=TLSv1_1_server_method(); }
 #endif
 #ifndef OPENSSL_NO_DTLS1
                else if (strcmp(*argv,"-dtls1") == 0)
@@ -1197,7 +1239,13 @@ int MAIN(int argc, char *argv[])
                        if (--argc < 1) goto bad;
                        s_key_file2= *(++argv);
                        }
-                       
+# ifndef OPENSSL_NO_NEXTPROTONEG
+               else if (strcmp(*argv,"-nextprotoneg") == 0)
+                       {
+                       if (--argc < 1) goto bad;
+                       next_proto_neg_in = *(++argv);
+                       }
+# endif
 #endif
 #if !defined(OPENSSL_NO_JPAKE) && !defined(OPENSSL_NO_PSK)
                else if (strcmp(*argv,"-jpake") == 0)
@@ -1302,6 +1350,21 @@ bad:
                                goto end;
                                }
                        }
+# ifndef OPENSSL_NO_NEXTPROTONEG
+               if (next_proto_neg_in)
+                       {
+                       unsigned short len;
+                       next_proto.data = next_protos_parse(&len,
+                               next_proto_neg_in);
+                       if (next_proto.data == NULL)
+                               goto end;
+                       next_proto.len = len;
+                       }
+               else
+                       {
+                       next_proto.data = NULL;
+                       }
+# endif
 #endif
                }
 
@@ -1402,6 +1465,8 @@ bad:
        if (state) SSL_CTX_set_info_callback(ctx,apps_ssl_info_callback);
        if (no_cache)
                SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_OFF);
+       else if (ext_cache)
+               init_session_cache_ctx(ctx);
        else
                SSL_CTX_sess_set_cache_size(ctx,128);
 
@@ -1471,6 +1536,8 @@ bad:
 
                if (no_cache)
                        SSL_CTX_set_session_cache_mode(ctx2,SSL_SESS_CACHE_OFF);
+               else if (ext_cache)
+                       init_session_cache_ctx(ctx2);
                else
                        SSL_CTX_sess_set_cache_size(ctx2,128);
 
@@ -1482,6 +1549,11 @@ bad:
                if (vpm)
                        SSL_CTX_set1_param(ctx2, vpm);
                }
+
+# ifndef OPENSSL_NO_NEXTPROTONEG
+       if (next_proto.data)
+               SSL_CTX_set_next_protos_advertised_cb(ctx, next_proto_cb, &next_proto);
+# endif
 #endif 
 
 #ifndef OPENSSL_NO_DH
@@ -1630,6 +1702,15 @@ bad:
 #endif
 #endif
 
+       if (no_resume_ephemeral)
+               {
+               SSL_CTX_set_not_resumable_session_callback(ctx, not_resumable_sess_cb);
+#ifndef OPENSSL_NO_TLSEXT
+               if (ctx2)
+                       SSL_CTX_set_not_resumable_session_callback(ctx2, not_resumable_sess_cb);
+#endif
+               }
+
 #ifndef OPENSSL_NO_PSK
 #ifdef OPENSSL_NO_JPAKE
        if (psk_key != NULL)
@@ -1721,6 +1802,7 @@ end:
                OPENSSL_free(pass);
        if (dpass)
                OPENSSL_free(dpass);
+       free_sessions();
 #ifndef OPENSSL_NO_TLSEXT
        if (ctx2 != NULL) SSL_CTX_free(ctx2);
        if (s_cert2)
@@ -2165,6 +2247,10 @@ static int init_ssl_connection(SSL *con)
        X509 *peer;
        long verify_error;
        MS_STATIC char buf[BUFSIZ];
+#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
+       const unsigned char *next_proto_neg;
+       unsigned next_proto_neg_len;
+#endif
 
        if ((i=SSL_accept(con)) <= 0)
                {
@@ -2204,6 +2290,15 @@ static int init_ssl_connection(SSL *con)
                BIO_printf(bio_s_out,"Shared ciphers:%s\n",buf);
        str=SSL_CIPHER_get_name(SSL_get_current_cipher(con));
        BIO_printf(bio_s_out,"CIPHER is %s\n",(str != NULL)?str:"(NONE)");
+#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
+       SSL_get0_next_proto_negotiated(con, &next_proto_neg, &next_proto_neg_len);
+       if (next_proto_neg)
+               {
+               BIO_printf(bio_s_out,"NEXTPROTO is ");
+               BIO_write(bio_s_out, next_proto_neg, next_proto_neg_len);
+               BIO_printf(bio_s_out, "\n");
+               }
+#endif
        if (con->hit) BIO_printf(bio_s_out,"Reused session-id\n");
        if (SSL_ctrl(con,SSL_CTRL_GET_FLAGS,0,NULL) &
                TLS1_FLAGS_TLS_PADDING_BUG)
@@ -2215,6 +2310,8 @@ static int init_ssl_connection(SSL *con)
                        con->kssl_ctx->client_princ);
                }
 #endif /* OPENSSL_NO_KRB5 */
+       BIO_printf(bio_s_out, "Secure Renegotiation IS%s supported\n",
+                     SSL_get_secure_renegotiation_support(con) ? "" : " NOT");
        return(1);
        }
 
@@ -2258,11 +2355,10 @@ static int www_body(char *hostname, int s, unsigned char *context)
        {
        char *buf=NULL;
        int ret=1;
-       int i,j,k,blank,dot;
+       int i,j,k,dot;
        SSL *con;
        const SSL_CIPHER *c;
        BIO *io,*ssl_bio,*sbio;
-       long total_bytes;
 
        buf=OPENSSL_malloc(bufsize);
        if (buf == NULL) return(0);
@@ -2313,7 +2409,6 @@ static int www_body(char *hostname, int s, unsigned char *context)
                }
        SSL_set_bio(con,sbio,sbio);
        SSL_set_accept_state(con);
-
        /* SSL_set_fd(con,s); */
        BIO_set_ssl(ssl_bio,con,BIO_CLOSE);
        BIO_push(io,ssl_bio);
@@ -2333,7 +2428,6 @@ static int www_body(char *hostname, int s, unsigned char *context)
                SSL_set_msg_callback_arg(con, bio_s_out);
                }
 
-       blank=0;
        for (;;)
                {
                if (hack)
@@ -2395,6 +2489,32 @@ static int www_body(char *hostname, int s, unsigned char *context)
                        STACK_OF(SSL_CIPHER) *sk;
                        static const char *space="                          ";
 
+               if (www == 1 && strncmp("GET /reneg", buf, 10) == 0)
+                       {
+                       if (strncmp("GET /renegcert", buf, 14) == 0)
+                               SSL_set_verify(con,
+                               SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,NULL);
+                       i=SSL_renegotiate(con);
+                       BIO_printf(bio_s_out, "SSL_renegotiate -> %d\n",i);
+                       i=SSL_do_handshake(con);
+                       if (i <= 0)
+                               {
+                               BIO_printf(bio_s_out, "SSL_do_handshake() Retval %d\n", SSL_get_error(con, i));
+                               ERR_print_errors(bio_err);
+                               goto err;
+                               }
+                       /* EVIL HACK! */
+                       con->state = SSL_ST_ACCEPT;
+                       i=SSL_do_handshake(con);
+                       BIO_printf(bio_s_out, "SSL_do_handshake -> %d\n",i);
+                       if (i <= 0)
+                               {
+                               BIO_printf(bio_s_out, "SSL_do_handshake() Retval %d\n", SSL_get_error(con, i));
+                               ERR_print_errors(bio_err);
+                               goto err;
+                               }
+                       }
+
                        BIO_puts(io,"HTTP/1.0 200 ok\r\nContent-type: text/html\r\n\r\n");
                        BIO_puts(io,"<HTML><BODY BGCOLOR=\"#ffffff\">\n");
                        BIO_puts(io,"<pre>\n");
@@ -2407,6 +2527,11 @@ static int www_body(char *hostname, int s, unsigned char *context)
                                }
                        BIO_puts(io,"\n");
 
+                       BIO_printf(io,
+                               "Secure Renegotiation IS%s supported\n",
+                               SSL_get_secure_renegotiation_support(con) ?
+                                                       "" : " NOT");
+
                        /* The following is evil and should not really
                         * be done */
                        BIO_printf(io,"Ciphers supported in s_server binary\n");
@@ -2563,7 +2688,6 @@ static int www_body(char *hostname, int s, unsigned char *context)
                                         BIO_puts(io,"HTTP/1.0 200 ok\r\nContent-type: text/plain\r\n\r\n");
                                 }
                        /* send the file */
-                       total_bytes=0;
                        for (;;)
                                {
                                i=BIO_read(file,buf,bufsize);
@@ -2693,3 +2817,115 @@ static int generate_session_id(const SSL *ssl, unsigned char *id,
                return 0;
        return 1;
        }
+
+/* By default s_server uses an in-memory cache which caches SSL_SESSION
+ * structures without any serialisation. This hides some bugs which only
+ * become apparent in deployed servers. By implementing a basic external
+ * session cache some issues can be debugged using s_server.
+ */
+
+typedef struct simple_ssl_session_st
+       {
+       unsigned char *id;
+       int idlen;
+       unsigned char *der;
+       int derlen;
+       struct simple_ssl_session_st *next;
+       } simple_ssl_session;
+
+static simple_ssl_session *first = NULL;
+
+static int add_session(SSL *ssl, SSL_SESSION *session)
+       {
+       simple_ssl_session *sess;
+       unsigned char *p;
+
+       sess = OPENSSL_malloc(sizeof(simple_ssl_session));
+
+       sess->idlen = session->session_id_length;
+       sess->derlen = i2d_SSL_SESSION(session, NULL);
+
+       sess->id = BUF_memdup(session->session_id, sess->idlen);
+
+       sess->der = OPENSSL_malloc(sess->derlen);
+       p = sess->der;
+       i2d_SSL_SESSION(session, &p);
+
+       sess->next = first;
+       first = sess;
+       BIO_printf(bio_err, "New session added to external cache\n");
+       return 0;
+       }
+
+static SSL_SESSION *get_session(SSL *ssl, unsigned char *id, int idlen,
+                                       int *do_copy)
+       {
+       simple_ssl_session *sess;
+       *do_copy = 0;
+       for (sess = first; sess; sess = sess->next)
+               {
+               if (idlen == sess->idlen && !memcmp(sess->id, id, idlen))
+                       {
+                       const unsigned char *p = sess->der;
+                       BIO_printf(bio_err, "Lookup session: cache hit\n");
+                       return d2i_SSL_SESSION(NULL, &p, sess->derlen);
+                       }
+               }
+       BIO_printf(bio_err, "Lookup session: cache miss\n");
+       return NULL;
+       }
+
+static void del_session(SSL_CTX *sctx, SSL_SESSION *session)
+       {
+       simple_ssl_session *sess, *prev = NULL;
+       unsigned char *id = session->session_id;
+       int idlen = session->session_id_length;
+       for (sess = first; sess; sess = sess->next)
+               {
+               if (idlen == sess->idlen && !memcmp(sess->id, id, idlen))
+                       {
+                       if(prev)
+                               prev->next = sess->next;
+                       else
+                               first = sess->next;
+                       OPENSSL_free(sess->id);
+                       OPENSSL_free(sess->der);
+                       OPENSSL_free(sess);
+                       return;
+                       }
+               prev = sess;
+               }
+       }
+
+static void init_session_cache_ctx(SSL_CTX *sctx)
+       {
+       SSL_CTX_set_session_cache_mode(sctx,
+                       SSL_SESS_CACHE_NO_INTERNAL|SSL_SESS_CACHE_SERVER);
+       SSL_CTX_sess_set_new_cb(sctx, add_session);
+        SSL_CTX_sess_set_get_cb(sctx, get_session);
+        SSL_CTX_sess_set_remove_cb(sctx, del_session);
+       }
+
+static void free_sessions(void)
+       {
+       simple_ssl_session *sess, *tsess;
+       for (sess = first; sess;)
+               {
+               OPENSSL_free(sess->id);
+               OPENSSL_free(sess->der);
+               tsess = sess;
+               sess = sess->next;
+               OPENSSL_free(tsess);
+               }
+       first = NULL;
+       }
+       
+
+
+
+
+
+
+       
+
+