Add DTLS-SRTP.
[openssl.git] / apps / s_client.c
index 484d009987b6690291d844f7fb1b5e317fff2cb0..5527dc2c9c36591cc963b0a8af5ad55829e9fc75 100644 (file)
@@ -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"
 
@@ -315,14 +318,22 @@ 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_2       - just use TLSv1.2\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 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," -no_tls1_2/-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");
@@ -343,8 +354,12 @@ 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");
+       BIO_printf(bio_err," -use_srtp profiles - Offer SRTP key management with a colon-separated profile list");
        }
 
 #ifndef OPENSSL_NO_TLSEXT
@@ -367,6 +382,147 @@ 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
+       char *srtp_profiles = NULL;
+
+# 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
@@ -385,6 +541,9 @@ int MAIN(int argc, char **argv)
        {
        unsigned int off=0, clr=0;
        SSL *con=NULL;
+#ifndef OPENSSL_NO_KRB5
+       KSSL_CTX *kctx;
+#endif
        int s,k,width,state=0;
        char *cbuf=NULL,*sbuf=NULL,*mbuf=NULL;
        int cbuf_len,cbuf_off;
@@ -430,6 +589,9 @@ 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;
@@ -440,6 +602,11 @@ 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();
@@ -589,6 +756,37 @@ 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();
@@ -598,6 +796,8 @@ int MAIN(int argc, char **argv)
                        meth=SSLv3_client_method();
 #endif
 #ifndef OPENSSL_NO_TLS1
+               else if (strcmp(*argv,"-tls1_2") == 0)
+                       meth=TLSv1_2_client_method();
                else if (strcmp(*argv,"-tls1_1") == 0)
                        meth=TLSv1_1_client_method();
                else if (strcmp(*argv,"-tls1") == 0)
@@ -648,6 +848,8 @@ int MAIN(int argc, char **argv)
                        if (--argc < 1) goto bad;
                        CAfile= *(++argv);
                        }
+               else if (strcmp(*argv,"-no_tls1_2") == 0)
+                       off|=SSL_OP_NO_TLSv1_2;
                else if (strcmp(*argv,"-no_tls1_1") == 0)
                        off|=SSL_OP_NO_TLSv1_1;
                else if (strcmp(*argv,"-no_tls1") == 0)
@@ -661,6 +863,13 @@ 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;
@@ -728,7 +937,12 @@ int MAIN(int argc, char **argv)
                        jpake_secret = *++argv;
                        }
 #endif
-               else
+               else if (strcmp(*argv,"-use_srtp") == 0)
+                       {
+                       if (--argc < 1) goto bad;
+                       srtp_profiles = *(++argv);
+                       }
+                else
                        {
                        BIO_printf(bio_err,"unknown option %s\n",*argv);
                        badop=1;
@@ -767,6 +981,21 @@ 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)
@@ -840,6 +1069,14 @@ 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)
                {
@@ -875,6 +1112,8 @@ bad:
                        BIO_printf(bio_c_out, "PSK key given or JPAKE in use, setting client callback\n");
                SSL_CTX_set_psk_client_callback(ctx, psk_client_cb);
                }
+       if (srtp_profiles != NULL)
+               SSL_CTX_set_tlsext_use_srtp(ctx, srtp_profiles);
 #endif
        if (bugs)
                SSL_CTX_set_options(ctx,SSL_OP_ALL|off);
@@ -888,6 +1127,11 @@ bad:
         */
        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)) {
@@ -919,6 +1163,26 @@ 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);
@@ -957,9 +1221,10 @@ bad:
                }
 #endif
 #ifndef OPENSSL_NO_KRB5
-       if (con  &&  (con->kssl_ctx = kssl_ctx_new()) != NULL)
+       if (con  &&  (kctx = kssl_ctx_new()) != NULL)
                 {
-                kssl_ctx_setstring(con->kssl_ctx, KSSL_SERVER, host);
+               SSL_set0_kssl_ctx(con, kctx);
+                kssl_ctx_setstring(kctx, KSSL_SERVER, host);
                }
 #endif /* OPENSSL_NO_KRB5  */
 /*     SSL_set_cipher_list(con,"RC4-MD5"); */
@@ -991,7 +1256,7 @@ re_start:
                        }
                }
 #endif                                              
-       if (c_Pause & 0x01) con->debug=1;
+       if (c_Pause & 0x01) SSL_set_debug(con, 1);
 
        if ( SSL_version(con) == DTLS1_VERSION)
                {
@@ -1040,7 +1305,7 @@ re_start:
 
        if (c_debug)
                {
-               con->debug=1;
+               SSL_set_debug(con, 1);
                BIO_set_callback(sbio,bio_dump_callback);
                BIO_set_callback_arg(sbio,(char *)bio_c_out);
                }
@@ -1725,7 +1990,7 @@ static void print_stuff(BIO *bio, SSL *s, int full)
                        BIO_number_read(SSL_get_rbio(s)),
                        BIO_number_written(SSL_get_wbio(s)));
                }
-       BIO_printf(bio,((s->hit)?"---\nReused, ":"---\nNew, "));
+       BIO_printf(bio,(SSL_cache_hit(s)?"---\nReused, ":"---\nNew, "));
        c=SSL_get_current_cipher(s);
        BIO_printf(bio,"%s, Cipher is %s\n",
                SSL_CIPHER_get_version(c),
@@ -1747,6 +2012,38 @@ 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
+
+#ifdef SSL_DEBUG
+       {
+       /* Print out local port of connection: useful for debugging */
+       int sock;
+       struct sockaddr_in ladd;
+       socklen_t ladd_size = sizeof(ladd);
+       sock = SSL_get_fd(s);
+       getsockname(sock, (struct sockaddr *)&ladd, &ladd_size);
+       BIO_printf(bio_c_out, "LOCAL PORT is %u\n", ntohs(ladd.sin_port));
+       }
+#endif
+
+       {
+       SRTP_PROTECTION_PROFILE *srtp_profile=SSL_get_selected_srtp_profile(s);
+       if(srtp_profile)
+               BIO_printf(bio,"SRTP Extension negotiated, profile=%s\n",
+                          srtp_profile->name);
+       }
        SSL_SESSION_print(bio,SSL_get_session(s));
        BIO_printf(bio,"---\n");
        if (peer != NULL)