/* apps/s_server.c */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ /* ==================================================================== * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. All advertising materials mentioning features or use of this * software must display the following acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to * endorse or promote products derived from this software without * prior written permission. For written permission, please contact * openssl-core@openssl.org. * * 5. Products derived from this software may not be called "OpenSSL" * nor may "OpenSSL" appear in their names without prior written * permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit (http://www.openssl.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * ==================================================================== * * This product includes cryptographic software written by Eric Young * (eay@cryptsoft.com). This product includes software written by Tim * Hudson (tjh@cryptsoft.com). * */ #include #include #include #include #include #include #include #ifdef OPENSSL_NO_STDIO #define APPS_WIN16 #endif /* With IPv6, it looks like Digital has mixed up the proper order of recursive header file inclusion, resulting in the compiler complaining that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which is needed to have fileno() declared correctly... So let's define u_int */ #if defined(OPENSSL_SYS_VMS_DECC) && !defined(__U_INT) #define __U_INT typedef unsigned int u_int; #endif #include #include #define USE_SOCKETS #include "apps.h" #include #include #include #include #include #include "s_apps.h" #ifdef OPENSSL_SYS_WINDOWS #include #endif #if (defined(OPENSSL_SYS_VMS) && __VMS_VER < 70000000) /* FIONBIO used as a switch to enable ioctl, and that isn't in VMS < 7.0 */ #undef FIONBIO #endif #ifndef OPENSSL_NO_RSA static RSA MS_CALLBACK *tmp_rsa_cb(SSL *s, int is_export, int keylength); #endif 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 ); static void sv_usage(void); 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); #ifndef OPENSSL_NO_DH static DH *load_dh_param(char *dhfile); static DH *get_dh512(void); #endif #ifdef MONOLITH static void s_server_init(void); #endif #ifndef S_ISDIR # if defined(_S_IFMT) && defined(_S_IFDIR) # define S_ISDIR(a) (((a) & _S_IFMT) == _S_IFDIR) # else # define S_ISDIR(a) (((a) & S_IFMT) == S_IFDIR) # endif #endif #ifndef OPENSSL_NO_DH static unsigned char dh512_p[]={ 0xDA,0x58,0x3C,0x16,0xD9,0x85,0x22,0x89,0xD0,0xE4,0xAF,0x75, 0x6F,0x4C,0xCA,0x92,0xDD,0x4B,0xE5,0x33,0xB8,0x04,0xFB,0x0F, 0xED,0x94,0xEF,0x9C,0x8A,0x44,0x03,0xED,0x57,0x46,0x50,0xD3, 0x69,0x99,0xDB,0x29,0xD7,0x76,0x27,0x6B,0xA2,0xD3,0xD4,0x12, 0xE2,0x18,0xF4,0xDD,0x1E,0x08,0x4C,0xF6,0xD8,0x00,0x3E,0x7C, 0x47,0x74,0xE8,0x33, }; static unsigned char dh512_g[]={ 0x02, }; static DH *get_dh512(void) { DH *dh=NULL; if ((dh=DH_new()) == NULL) return(NULL); dh->p=BN_bin2bn(dh512_p,sizeof(dh512_p),NULL); dh->g=BN_bin2bn(dh512_g,sizeof(dh512_g),NULL); if ((dh->p == NULL) || (dh->g == NULL)) return(NULL); return(dh); } #endif /* static int load_CA(SSL_CTX *ctx, char *file);*/ #undef BUFSIZZ #define BUFSIZZ 16*1024 static int bufsize=BUFSIZZ; static int accept_socket= -1; #define TEST_CERT "server.pem" #undef PROG #define PROG s_server_main extern int verify_depth; static char *cipher=NULL; static int s_server_verify=SSL_VERIFY_NONE; static int s_server_session_id_context = 1; /* anything will do */ static char *s_cert_file=TEST_CERT,*s_key_file=NULL; static char *s_dcert_file=NULL,*s_dkey_file=NULL; #ifdef FIONBIO static int s_nbio=0; #endif static int s_nbio_test=0; int s_crlf=0; static SSL_CTX *ctx=NULL; static int www=0; static BIO *bio_s_out=NULL; static int s_debug=0; static int s_msg=0; static int s_quiet=0; static int hack=0; static char *engine_id=NULL; static const char *session_id_prefix=NULL; #ifdef MONOLITH static void s_server_init(void) { accept_socket=-1; cipher=NULL; s_server_verify=SSL_VERIFY_NONE; s_dcert_file=NULL; s_dkey_file=NULL; s_cert_file=TEST_CERT; s_key_file=NULL; #ifdef FIONBIO s_nbio=0; #endif s_nbio_test=0; ctx=NULL; www=0; bio_s_out=NULL; s_debug=0; s_msg=0; s_quiet=0; hack=0; engine_id=NULL; } #endif static void sv_usage(void) { BIO_printf(bio_err,"usage: s_server [args ...]\n"); BIO_printf(bio_err,"\n"); BIO_printf(bio_err," -accept arg - port to accept on (default is %d)\n",PORT); BIO_printf(bio_err," -context arg - set session ID context\n"); BIO_printf(bio_err," -verify arg - turn on peer certificate verification\n"); BIO_printf(bio_err," -Verify arg - turn on peer certificate verification, must have a cert.\n"); BIO_printf(bio_err," -cert arg - certificate file to use, PEM format assumed\n"); BIO_printf(bio_err," (default is %s)\n",TEST_CERT); BIO_printf(bio_err," -key arg - Private Key file to use, PEM format assumed, in cert file if\n"); BIO_printf(bio_err," not specified (default is %s)\n",TEST_CERT); BIO_printf(bio_err," -dcert arg - second certificate file to use (usually for DSA)\n"); BIO_printf(bio_err," -dkey arg - second private key file to use (usually for DSA)\n"); BIO_printf(bio_err," -dhparam arg - DH parameter file to use, in cert file if not specified\n"); BIO_printf(bio_err," or a default set of parameters is used\n"); #ifdef FIONBIO BIO_printf(bio_err," -nbio - Run with non-blocking IO\n"); #endif BIO_printf(bio_err," -nbio_test - test with the non-blocking test bio\n"); BIO_printf(bio_err," -crlf - convert LF from terminal into CRLF\n"); BIO_printf(bio_err," -debug - Print more output\n"); BIO_printf(bio_err," -msg - Show protocol messages\n"); BIO_printf(bio_err," -state - Print the SSL states\n"); BIO_printf(bio_err," -CApath arg - PEM format directory of CA's\n"); BIO_printf(bio_err," -CAfile arg - PEM format file of CA's\n"); BIO_printf(bio_err," -nocert - Don't use any certificates (Anon-DH)\n"); BIO_printf(bio_err," -cipher arg - play with 'openssl ciphers' to see what goes here\n"); BIO_printf(bio_err," -serverpref - Use server's cipher preferences\n"); BIO_printf(bio_err," -quiet - No server output\n"); BIO_printf(bio_err," -no_tmp_rsa - Do not generate a tmp RSA key\n"); BIO_printf(bio_err," -ssl2 - Just talk SSLv2\n"); BIO_printf(bio_err," -ssl3 - Just talk SSLv3\n"); BIO_printf(bio_err," -tls1 - Just talk TLSv1\n"); BIO_printf(bio_err," -no_ssl2 - Just disable SSLv2\n"); BIO_printf(bio_err," -no_ssl3 - Just disable SSLv3\n"); BIO_printf(bio_err," -no_tls1 - Just disable TLSv1\n"); #ifndef OPENSSL_NO_DH BIO_printf(bio_err," -no_dhe - Disable ephemeral DH\n"); #endif 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 / HTTP/1.0' with file ./\n"); BIO_printf(bio_err," -HTTP - Respond to a 'GET / HTTP/1.0' with file ./\n"); BIO_printf(bio_err," with the assumption it contains a complete HTTP response.\n"); BIO_printf(bio_err," -engine id - Initialise and use the specified engine\n"); BIO_printf(bio_err," -id_prefix arg - Generate SSL/TLS session IDs prefixed by 'arg'\n"); BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR); } static int local_argc=0; static char **local_argv; #ifdef CHARSET_EBCDIC static int ebcdic_new(BIO *bi); static int ebcdic_free(BIO *a); static int ebcdic_read(BIO *b, char *out, int outl); static int ebcdic_write(BIO *b, char *in, int inl); static long ebcdic_ctrl(BIO *b, int cmd, long num, char *ptr); static int ebcdic_gets(BIO *bp, char *buf, int size); static int ebcdic_puts(BIO *bp, char *str); #define BIO_TYPE_EBCDIC_FILTER (18|0x0200) static BIO_METHOD methods_ebcdic= { BIO_TYPE_EBCDIC_FILTER, "EBCDIC/ASCII filter", ebcdic_write, ebcdic_read, ebcdic_puts, ebcdic_gets, ebcdic_ctrl, ebcdic_new, ebcdic_free, }; typedef struct { size_t alloced; char buff[1]; } EBCDIC_OUTBUFF; BIO_METHOD *BIO_f_ebcdic_filter() { return(&methods_ebcdic); } static int ebcdic_new(BIO *bi) { EBCDIC_OUTBUFF *wbuf; wbuf = (EBCDIC_OUTBUFF *)OPENSSL_malloc(sizeof(EBCDIC_OUTBUFF) + 1024); wbuf->alloced = 1024; wbuf->buff[0] = '\0'; bi->ptr=(char *)wbuf; bi->init=1; bi->flags=0; return(1); } static int ebcdic_free(BIO *a) { if (a == NULL) return(0); if (a->ptr != NULL) OPENSSL_free(a->ptr); a->ptr=NULL; a->init=0; a->flags=0; return(1); } static int ebcdic_read(BIO *b, char *out, int outl) { int ret=0; if (out == NULL || outl == 0) return(0); if (b->next_bio == NULL) return(0); ret=BIO_read(b->next_bio,out,outl); if (ret > 0) ascii2ebcdic(out,out,ret); return(ret); } static int ebcdic_write(BIO *b, char *in, int inl) { EBCDIC_OUTBUFF *wbuf; int ret=0; int num; unsigned char n; if ((in == NULL) || (inl <= 0)) return(0); if (b->next_bio == NULL) return(0); wbuf=(EBCDIC_OUTBUFF *)b->ptr; if (inl > (num = wbuf->alloced)) { num = num + num; /* double the size */ if (num < inl) num = inl; OPENSSL_free(wbuf); wbuf=(EBCDIC_OUTBUFF *)OPENSSL_malloc(sizeof(EBCDIC_OUTBUFF) + num); wbuf->alloced = num; wbuf->buff[0] = '\0'; b->ptr=(char *)wbuf; } ebcdic2ascii(wbuf->buff, in, inl); ret=BIO_write(b->next_bio, wbuf->buff, inl); return(ret); } static long ebcdic_ctrl(BIO *b, int cmd, long num, char *ptr) { long ret; if (b->next_bio == NULL) return(0); switch (cmd) { case BIO_CTRL_DUP: ret=0L; break; default: ret=BIO_ctrl(b->next_bio,cmd,num,ptr); break; } return(ret); } static int ebcdic_gets(BIO *bp, char *buf, int size) { int i, ret; if (bp->next_bio == NULL) return(0); /* return(BIO_gets(bp->next_bio,buf,size));*/ for (i=0; inext_bio == NULL) return(0); return ebcdic_write(bp, str, strlen(str)); } #endif int MAIN(int, char **); int MAIN(int argc, char *argv[]) { X509_STORE *store = NULL; int vflags = 0; short port=PORT; char *CApath=NULL,*CAfile=NULL; char *context = NULL; char *dhfile = NULL; int badop=0,bugs=0; int ret=1; int off=0; int no_tmp_rsa=0,no_dhe=0,nocert=0; int state=0; SSL_METHOD *meth=NULL; ENGINE *e=NULL; char *inrand=NULL; #if !defined(OPENSSL_NO_SSL2) && !defined(OPENSSL_NO_SSL3) meth=SSLv23_server_method(); #elif !defined(OPENSSL_NO_SSL3) meth=SSLv3_server_method(); #elif !defined(OPENSSL_NO_SSL2) meth=SSLv2_server_method(); #endif local_argc=argc; local_argv=argv; apps_startup(); #ifdef MONOLITH s_server_init(); #endif if (bio_err == NULL) bio_err=BIO_new_fp(stderr,BIO_NOCLOSE); if (!load_config(bio_err, NULL)) goto end; verify_depth=0; #ifdef FIONBIO s_nbio=0; #endif s_nbio_test=0; argc--; argv++; while (argc >= 1) { if ((strcmp(*argv,"-port") == 0) || (strcmp(*argv,"-accept") == 0)) { if (--argc < 1) goto bad; if (!extract_port(*(++argv),&port)) goto bad; } else if (strcmp(*argv,"-verify") == 0) { s_server_verify=SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE; if (--argc < 1) goto bad; verify_depth=atoi(*(++argv)); BIO_printf(bio_err,"verify depth is %d\n",verify_depth); } else if (strcmp(*argv,"-Verify") == 0) { s_server_verify=SSL_VERIFY_PEER|SSL_VERIFY_FAIL_IF_NO_PEER_CERT| SSL_VERIFY_CLIENT_ONCE; if (--argc < 1) goto bad; verify_depth=atoi(*(++argv)); BIO_printf(bio_err,"verify depth is %d, must return a certificate\n",verify_depth); } else if (strcmp(*argv,"-context") == 0) { if (--argc < 1) goto bad; context= *(++argv); } else if (strcmp(*argv,"-cert") == 0) { if (--argc < 1) goto bad; s_cert_file= *(++argv); } else if (strcmp(*argv,"-key") == 0) { if (--argc < 1) goto bad; s_key_file= *(++argv); } else if (strcmp(*argv,"-dhparam") == 0) { if (--argc < 1) goto bad; dhfile = *(++argv); } else if (strcmp(*argv,"-dcert") == 0) { if (--argc < 1) goto bad; s_dcert_file= *(++argv); } else if (strcmp(*argv,"-dkey") == 0) { if (--argc < 1) goto bad; s_dkey_file= *(++argv); } else if (strcmp(*argv,"-nocert") == 0) { nocert=1; } else if (strcmp(*argv,"-CApath") == 0) { if (--argc < 1) goto bad; CApath= *(++argv); } else if (strcmp(*argv,"-crl_check") == 0) { vflags |= X509_V_FLAG_CRL_CHECK; } else if (strcmp(*argv,"-crl_check") == 0) { vflags |= X509_V_FLAG_CRL_CHECK|X509_V_FLAG_CRL_CHECK_ALL; } else if (strcmp(*argv,"-serverpref") == 0) { off|=SSL_OP_CIPHER_SERVER_PREFERENCE; } else if (strcmp(*argv,"-cipher") == 0) { if (--argc < 1) goto bad; cipher= *(++argv); } else if (strcmp(*argv,"-CAfile") == 0) { if (--argc < 1) goto bad; CAfile= *(++argv); } #ifdef FIONBIO else if (strcmp(*argv,"-nbio") == 0) { s_nbio=1; } #endif else if (strcmp(*argv,"-nbio_test") == 0) { #ifdef FIONBIO s_nbio=1; #endif s_nbio_test=1; } else if (strcmp(*argv,"-debug") == 0) { s_debug=1; } else if (strcmp(*argv,"-msg") == 0) { s_msg=1; } else if (strcmp(*argv,"-hack") == 0) { hack=1; } else if (strcmp(*argv,"-state") == 0) { state=1; } else if (strcmp(*argv,"-crlf") == 0) { s_crlf=1; } else if (strcmp(*argv,"-quiet") == 0) { s_quiet=1; } else if (strcmp(*argv,"-bugs") == 0) { bugs=1; } else if (strcmp(*argv,"-no_tmp_rsa") == 0) { no_tmp_rsa=1; } else if (strcmp(*argv,"-no_dhe") == 0) { no_dhe=1; } else if (strcmp(*argv,"-www") == 0) { www=1; } else if (strcmp(*argv,"-WWW") == 0) { www=2; } else if (strcmp(*argv,"-HTTP") == 0) { www=3; } else if (strcmp(*argv,"-no_ssl2") == 0) { off|=SSL_OP_NO_SSLv2; } else if (strcmp(*argv,"-no_ssl3") == 0) { off|=SSL_OP_NO_SSLv3; } else if (strcmp(*argv,"-no_tls1") == 0) { off|=SSL_OP_NO_TLSv1; } #ifndef OPENSSL_NO_SSL2 else if (strcmp(*argv,"-ssl2") == 0) { meth=SSLv2_server_method(); } #endif #ifndef OPENSSL_NO_SSL3 else if (strcmp(*argv,"-ssl3") == 0) { meth=SSLv3_server_method(); } #endif #ifndef OPENSSL_NO_TLS1 else if (strcmp(*argv,"-tls1") == 0) { meth=TLSv1_server_method(); } #endif else if (strcmp(*argv, "-id_prefix") == 0) { if (--argc < 1) goto bad; session_id_prefix = *(++argv); } else if (strcmp(*argv,"-engine") == 0) { if (--argc < 1) goto bad; engine_id= *(++argv); } else if (strcmp(*argv,"-rand") == 0) { if (--argc < 1) goto bad; inrand= *(++argv); } else { BIO_printf(bio_err,"unknown option %s\n",*argv); badop=1; break; } argc--; argv++; } if (badop) { bad: sv_usage(); goto end; } SSL_load_error_strings(); OpenSSL_add_ssl_algorithms(); e = setup_engine(bio_err, engine_id, 1); if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL && !RAND_status()) { BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n"); } if (inrand != NULL) BIO_printf(bio_err,"%ld semi-random bytes loaded\n", app_RAND_load_files(inrand)); if (bio_s_out == NULL) { if (s_quiet && !s_debug && !s_msg) { bio_s_out=BIO_new(BIO_s_null()); } else { if (bio_s_out == NULL) bio_s_out=BIO_new_fp(stdout,BIO_NOCLOSE); } } #if !defined(OPENSSL_NO_RSA) || !defined(OPENSSL_NO_DSA) if (nocert) #endif { s_cert_file=NULL; s_key_file=NULL; s_dcert_file=NULL; s_dkey_file=NULL; } ctx=SSL_CTX_new(meth); if (ctx == NULL) { ERR_print_errors(bio_err); goto end; } if (session_id_prefix) { if(strlen(session_id_prefix) >= 32) BIO_printf(bio_err, "warning: id_prefix is too long, only one new session will be possible\n"); else if(strlen(session_id_prefix) >= 16) BIO_printf(bio_err, "warning: id_prefix is too long if you use SSLv2\n"); if(!SSL_CTX_set_generate_session_id(ctx, generate_session_id)) { BIO_printf(bio_err,"error setting 'id_prefix'\n"); ERR_print_errors(bio_err); goto end; } BIO_printf(bio_err,"id_prefix '%s' set.\n", session_id_prefix); } SSL_CTX_set_quiet_shutdown(ctx,1); if (bugs) SSL_CTX_set_options(ctx,SSL_OP_ALL); if (hack) SSL_CTX_set_options(ctx,SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG); SSL_CTX_set_options(ctx,off); if (state) SSL_CTX_set_info_callback(ctx,apps_ssl_info_callback); SSL_CTX_sess_set_cache_size(ctx,128); #if 0 if (cipher == NULL) cipher=getenv("SSL_CIPHER"); #endif #if 0 if (s_cert_file == NULL) { BIO_printf(bio_err,"You must specify a certificate file for the server to use\n"); goto end; } #endif if ((!SSL_CTX_load_verify_locations(ctx,CAfile,CApath)) || (!SSL_CTX_set_default_verify_paths(ctx))) { /* BIO_printf(bio_err,"X509_load_verify_locations\n"); */ ERR_print_errors(bio_err); /* goto end; */ } store = SSL_CTX_get_cert_store(ctx); X509_STORE_set_flags(store, vflags); #ifndef OPENSSL_NO_DH if (!no_dhe) { DH *dh=NULL; if (dhfile) dh = load_dh_param(dhfile); else if (s_cert_file) dh = load_dh_param(s_cert_file); if (dh != NULL) { BIO_printf(bio_s_out,"Setting temp DH parameters\n"); } else { BIO_printf(bio_s_out,"Using default temp DH parameters\n"); dh=get_dh512(); } (void)BIO_flush(bio_s_out); SSL_CTX_set_tmp_dh(ctx,dh); DH_free(dh); } #endif if (!set_cert_stuff(ctx,s_cert_file,s_key_file)) goto end; if (s_dcert_file != NULL) { if (!set_cert_stuff(ctx,s_dcert_file,s_dkey_file)) goto end; } #ifndef OPENSSL_NO_RSA #if 1 if (!no_tmp_rsa) SSL_CTX_set_tmp_rsa_callback(ctx,tmp_rsa_cb); #else if (!no_tmp_rsa && SSL_CTX_need_tmp_RSA(ctx)) { RSA *rsa; BIO_printf(bio_s_out,"Generating temp (512 bit) RSA key..."); BIO_flush(bio_s_out); rsa=RSA_generate_key(512,RSA_F4,NULL); if (!SSL_CTX_set_tmp_rsa(ctx,rsa)) { ERR_print_errors(bio_err); goto end; } RSA_free(rsa); BIO_printf(bio_s_out,"\n"); } #endif #endif if (cipher != NULL) if(!SSL_CTX_set_cipher_list(ctx,cipher)) { BIO_printf(bio_err,"error setting cipher list\n"); ERR_print_errors(bio_err); goto end; } SSL_CTX_set_verify(ctx,s_server_verify,verify_callback); SSL_CTX_set_session_id_context(ctx,(void*)&s_server_session_id_context, sizeof s_server_session_id_context); if (CAfile != NULL) SSL_CTX_set_client_CA_list(ctx,SSL_load_client_CA_file(CAfile)); BIO_printf(bio_s_out,"ACCEPT\n"); if (www) do_server(port,&accept_socket,www_body, context); else do_server(port,&accept_socket,sv_body, context); print_stats(bio_s_out,ctx); ret=0; end: if (ctx != NULL) SSL_CTX_free(ctx); if (bio_s_out != NULL) { BIO_free(bio_s_out); bio_s_out=NULL; } apps_shutdown(); EXIT(ret); } static void print_stats(BIO *bio, SSL_CTX *ssl_ctx) { BIO_printf(bio,"%4ld items in the session cache\n", SSL_CTX_sess_number(ssl_ctx)); BIO_printf(bio,"%4d client connects (SSL_connect())\n", SSL_CTX_sess_connect(ssl_ctx)); BIO_printf(bio,"%4d client renegotiates (SSL_connect())\n", SSL_CTX_sess_connect_renegotiate(ssl_ctx)); BIO_printf(bio,"%4d client connects that finished\n", SSL_CTX_sess_connect_good(ssl_ctx)); BIO_printf(bio,"%4d server accepts (SSL_accept())\n", SSL_CTX_sess_accept(ssl_ctx)); BIO_printf(bio,"%4d server renegotiates (SSL_accept())\n", SSL_CTX_sess_accept_renegotiate(ssl_ctx)); BIO_printf(bio,"%4d server accepts that finished\n", SSL_CTX_sess_accept_good(ssl_ctx)); BIO_printf(bio,"%4d session cache hits\n",SSL_CTX_sess_hits(ssl_ctx)); BIO_printf(bio,"%4d session cache misses\n",SSL_CTX_sess_misses(ssl_ctx)); BIO_printf(bio,"%4d session cache timeouts\n",SSL_CTX_sess_timeouts(ssl_ctx)); BIO_printf(bio,"%4d callback cache hits\n",SSL_CTX_sess_cb_hits(ssl_ctx)); BIO_printf(bio,"%4d cache full overflows (%d allowed)\n", SSL_CTX_sess_cache_full(ssl_ctx), SSL_CTX_sess_get_cache_size(ssl_ctx)); } static int sv_body(char *hostname, int s, unsigned char *context) { char *buf=NULL; fd_set readfds; int ret=1,width; int k,i; unsigned long l; SSL *con=NULL; BIO *sbio; #ifdef OPENSSL_SYS_WINDOWS struct timeval tv; #endif if ((buf=OPENSSL_malloc(bufsize)) == NULL) { BIO_printf(bio_err,"out of memory\n"); goto err; } #ifdef FIONBIO if (s_nbio) { unsigned long sl=1; if (!s_quiet) BIO_printf(bio_err,"turning on non blocking io\n"); if (BIO_socket_ioctl(s,FIONBIO,&sl) < 0) ERR_print_errors(bio_err); } #endif if (con == NULL) { con=SSL_new(ctx); #ifndef OPENSSL_NO_KRB5 if ((con->kssl_ctx = kssl_ctx_new()) != NULL) { kssl_ctx_setstring(con->kssl_ctx, KSSL_SERVICE, KRB5SVC); kssl_ctx_setstring(con->kssl_ctx, KSSL_KEYTAB, KRB5KEYTAB); } #endif /* OPENSSL_NO_KRB5 */ if(context) SSL_set_session_id_context(con, context, strlen((char *)context)); } SSL_clear(con); sbio=BIO_new_socket(s,BIO_NOCLOSE); if (s_nbio_test) { BIO *test; test=BIO_new(BIO_f_nbio_test()); sbio=BIO_push(test,sbio); } SSL_set_bio(con,sbio,sbio); SSL_set_accept_state(con); /* SSL_set_fd(con,s); */ if (s_debug) { con->debug=1; BIO_set_callback(SSL_get_rbio(con),bio_dump_cb); BIO_set_callback_arg(SSL_get_rbio(con),bio_s_out); } if (s_msg) { SSL_set_msg_callback(con, msg_cb); SSL_set_msg_callback_arg(con, bio_s_out); } width=s+1; for (;;) { int read_from_terminal; int read_from_sslcon; read_from_terminal = 0; read_from_sslcon = SSL_pending(con); if (!read_from_sslcon) { FD_ZERO(&readfds); #ifndef OPENSSL_SYS_WINDOWS FD_SET(fileno(stdin),&readfds); #endif FD_SET(s,&readfds); /* Note: under VMS with SOCKETSHR the second parameter is * currently of type (int *) whereas under other systems * it is (void *) if you don't have a cast it will choke * the compiler: if you do have a cast then you can either * go for (int *) or (void *). */ #ifdef OPENSSL_SYS_WINDOWS /* Under Windows we can't select on stdin: only * on sockets. As a workaround we timeout the select every * second and check for any keypress. In a proper Windows * application we wouldn't do this because it is inefficient. */ tv.tv_sec = 1; tv.tv_usec = 0; i=select(width,(void *)&readfds,NULL,NULL,&tv); if((i < 0) || (!i && !_kbhit() ) )continue; if(_kbhit()) read_from_terminal = 1; #else i=select(width,(void *)&readfds,NULL,NULL,NULL); if (i <= 0) continue; if (FD_ISSET(fileno(stdin),&readfds)) read_from_terminal = 1; #endif if (FD_ISSET(s,&readfds)) read_from_sslcon = 1; } if (read_from_terminal) { if (s_crlf) { int j, lf_num; i=read(fileno(stdin), buf, bufsize/2); lf_num = 0; /* both loops are skipped when i <= 0 */ for (j = 0; j < i; j++) if (buf[j] == '\n') lf_num++; for (j = i-1; j >= 0; j--) { buf[j+lf_num] = buf[j]; if (buf[j] == '\n') { lf_num--; i++; buf[j+lf_num] = '\r'; } } assert(lf_num == 0); } else i=read(fileno(stdin),buf,bufsize); if (!s_quiet) { if ((i <= 0) || (buf[0] == 'Q')) { BIO_printf(bio_s_out,"DONE\n"); SHUTDOWN(s); close_accept_socket(); ret= -11; goto err; } if ((i <= 0) || (buf[0] == 'q')) { BIO_printf(bio_s_out,"DONE\n"); SHUTDOWN(s); /* close_accept_socket(); ret= -11;*/ goto err; } if ((buf[0] == 'r') && ((buf[1] == '\n') || (buf[1] == '\r'))) { SSL_renegotiate(con); i=SSL_do_handshake(con); printf("SSL_do_handshake -> %d\n",i); i=0; /*13; */ continue; /* strcpy(buf,"server side RE-NEGOTIATE\n"); */ } if ((buf[0] == 'R') && ((buf[1] == '\n') || (buf[1] == '\r'))) { SSL_set_verify(con, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,NULL); SSL_renegotiate(con); i=SSL_do_handshake(con); printf("SSL_do_handshake -> %d\n",i); i=0; /* 13; */ continue; /* strcpy(buf,"server side RE-NEGOTIATE asking for client cert\n"); */ } if (buf[0] == 'P') { static char *str="Lets print some clear text\n"; BIO_write(SSL_get_wbio(con),str,strlen(str)); } if (buf[0] == 'S') { print_stats(bio_s_out,SSL_get_SSL_CTX(con)); } } #ifdef CHARSET_EBCDIC ebcdic2ascii(buf,buf,i); #endif l=k=0; for (;;) { /* should do a select for the write */ #ifdef RENEG { static count=0; if (++count == 100) { count=0; SSL_renegotiate(con); } } #endif k=SSL_write(con,&(buf[l]),(unsigned int)i); switch (SSL_get_error(con,k)) { case SSL_ERROR_NONE: break; case SSL_ERROR_WANT_WRITE: case SSL_ERROR_WANT_READ: case SSL_ERROR_WANT_X509_LOOKUP: BIO_printf(bio_s_out,"Write BLOCK\n"); break; case SSL_ERROR_SYSCALL: case SSL_ERROR_SSL: BIO_printf(bio_s_out,"ERROR\n"); ERR_print_errors(bio_err); ret=1; goto err; /* break; */ case SSL_ERROR_ZERO_RETURN: BIO_printf(bio_s_out,"DONE\n"); ret=1; goto err; } l+=k; i-=k; if (i <= 0) break; } } if (read_from_sslcon) { if (!SSL_is_init_finished(con)) { i=init_ssl_connection(con); if (i < 0) { ret=0; goto err; } else if (i == 0) { ret=1; goto err; } } else { again: i=SSL_read(con,(char *)buf,bufsize); switch (SSL_get_error(con,i)) { case SSL_ERROR_NONE: #ifdef CHARSET_EBCDIC ascii2ebcdic(buf,buf,i); #endif write(fileno(stdout),buf, (unsigned int)i); if (SSL_pending(con)) goto again; break; case SSL_ERROR_WANT_WRITE: case SSL_ERROR_WANT_READ: case SSL_ERROR_WANT_X509_LOOKUP: BIO_printf(bio_s_out,"Read BLOCK\n"); break; case SSL_ERROR_SYSCALL: case SSL_ERROR_SSL: BIO_printf(bio_s_out,"ERROR\n"); ERR_print_errors(bio_err); ret=1; goto err; case SSL_ERROR_ZERO_RETURN: BIO_printf(bio_s_out,"DONE\n"); ret=1; goto err; } } } } err: BIO_printf(bio_s_out,"shutting down SSL\n"); #if 1 SSL_set_shutdown(con,SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN); #else SSL_shutdown(con); #endif if (con != NULL) SSL_free(con); BIO_printf(bio_s_out,"CONNECTION CLOSED\n"); if (buf != NULL) { memset(buf,0,bufsize); OPENSSL_free(buf); } if (ret >= 0) BIO_printf(bio_s_out,"ACCEPT\n"); return(ret); } static void close_accept_socket(void) { BIO_printf(bio_err,"shutdown accept socket\n"); if (accept_socket >= 0) { SHUTDOWN2(accept_socket); } } static int init_ssl_connection(SSL *con) { int i; const char *str; X509 *peer; long verify_error; MS_STATIC char buf[BUFSIZ]; if ((i=SSL_accept(con)) <= 0) { if (BIO_sock_should_retry(i)) { BIO_printf(bio_s_out,"DELAY\n"); return(1); } BIO_printf(bio_err,"ERROR\n"); verify_error=SSL_get_verify_result(con); if (verify_error != X509_V_OK) { BIO_printf(bio_err,"verify error:%s\n", X509_verify_cert_error_string(verify_error)); } else ERR_print_errors(bio_err); return(0); } PEM_write_bio_SSL_SESSION(bio_s_out,SSL_get_session(con)); peer=SSL_get_peer_certificate(con); if (peer != NULL) { BIO_printf(bio_s_out,"Client certificate\n"); PEM_write_bio_X509(bio_s_out,peer); X509_NAME_oneline(X509_get_subject_name(peer),buf,BUFSIZ); BIO_printf(bio_s_out,"subject=%s\n",buf); X509_NAME_oneline(X509_get_issuer_name(peer),buf,BUFSIZ); BIO_printf(bio_s_out,"issuer=%s\n",buf); X509_free(peer); } if (SSL_get_shared_ciphers(con,buf,BUFSIZ) != NULL) 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 (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) BIO_printf(bio_s_out,"Peer has incorrect TLSv1 block padding\n"); return(1); } #ifndef OPENSSL_NO_DH static DH *load_dh_param(char *dhfile) { DH *ret=NULL; BIO *bio; if ((bio=BIO_new_file(dhfile,"r")) == NULL) goto err; ret=PEM_read_bio_DHparams(bio,NULL,NULL,NULL); err: if (bio != NULL) BIO_free(bio); return(ret); } #endif #if 0 static int load_CA(SSL_CTX *ctx, char *file) { FILE *in; X509 *x=NULL; if ((in=fopen(file,"r")) == NULL) return(0); for (;;) { if (PEM_read_X509(in,&x,NULL) == NULL) break; SSL_CTX_add_client_CA(ctx,x); } if (x != NULL) X509_free(x); fclose(in); return(1); } #endif static int www_body(char *hostname, int s, unsigned char *context) { char *buf=NULL; int ret=1; int i,j,k,blank,dot; struct stat st_buf; SSL *con; SSL_CIPHER *c; BIO *io,*ssl_bio,*sbio; long total_bytes; buf=OPENSSL_malloc(bufsize); if (buf == NULL) return(0); io=BIO_new(BIO_f_buffer()); ssl_bio=BIO_new(BIO_f_ssl()); if ((io == NULL) || (ssl_bio == NULL)) goto err; #ifdef FIONBIO if (s_nbio) { unsigned long sl=1; if (!s_quiet) BIO_printf(bio_err,"turning on non blocking io\n"); if (BIO_socket_ioctl(s,FIONBIO,&sl) < 0) ERR_print_errors(bio_err); } #endif /* lets make the output buffer a reasonable size */ if (!BIO_set_write_buffer_size(io,bufsize)) goto err; if ((con=SSL_new(ctx)) == NULL) goto err; #ifndef OPENSSL_NO_KRB5 if ((con->kssl_ctx = kssl_ctx_new()) != NULL) { kssl_ctx_setstring(con->kssl_ctx, KSSL_SERVICE, KRB5SVC); kssl_ctx_setstring(con->kssl_ctx, KSSL_KEYTAB, KRB5KEYTAB); } #endif /* OPENSSL_NO_KRB5 */ if(context) SSL_set_session_id_context(con, context, strlen((char *)context)); sbio=BIO_new_socket(s,BIO_NOCLOSE); if (s_nbio_test) { BIO *test; test=BIO_new(BIO_f_nbio_test()); sbio=BIO_push(test,sbio); } 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); #ifdef CHARSET_EBCDIC io = BIO_push(BIO_new(BIO_f_ebcdic_filter()),io); #endif if (s_debug) { con->debug=1; BIO_set_callback(SSL_get_rbio(con),bio_dump_cb); BIO_set_callback_arg(SSL_get_rbio(con),bio_s_out); } if (s_msg) { SSL_set_msg_callback(con, msg_cb); SSL_set_msg_callback_arg(con, bio_s_out); } blank=0; for (;;) { if (hack) { i=SSL_accept(con); switch (SSL_get_error(con,i)) { case SSL_ERROR_NONE: break; case SSL_ERROR_WANT_WRITE: case SSL_ERROR_WANT_READ: case SSL_ERROR_WANT_X509_LOOKUP: continue; case SSL_ERROR_SYSCALL: case SSL_ERROR_SSL: case SSL_ERROR_ZERO_RETURN: ret=1; goto err; /* break; */ } SSL_renegotiate(con); SSL_write(con,NULL,0); } i=BIO_gets(io,buf,bufsize-1); if (i < 0) /* error */ { if (!BIO_should_retry(io)) { if (!s_quiet) ERR_print_errors(bio_err); goto err; } else { BIO_printf(bio_s_out,"read R BLOCK\n"); #ifndef OPENSSL_SYS_MSDOS sleep(1); #endif continue; } } else if (i == 0) /* end of input */ { ret=1; goto end; } /* else we have data */ if ( ((www == 1) && (strncmp("GET ",buf,4) == 0)) || ((www == 2) && (strncmp("GET /stats ",buf,10) == 0))) { char *p; X509 *peer; STACK_OF(SSL_CIPHER) *sk; static char *space=" "; BIO_puts(io,"HTTP/1.0 200 ok\r\nContent-type: text/html\r\n\r\n"); BIO_puts(io,"\n"); BIO_puts(io,"
\n");
/*			BIO_puts(io,SSLeay_version(SSLEAY_VERSION));*/
			BIO_puts(io,"\n");
			for (i=0; ihit)
				?"---\nReused, "
				:"---\nNew, "));
			c=SSL_get_current_cipher(con);
			BIO_printf(io,"%s, Cipher is %s\n",
				SSL_CIPHER_get_version(c),
				SSL_CIPHER_get_name(c));
			SSL_SESSION_print(io,SSL_get_session(con));
			BIO_printf(io,"---\n");
			print_stats(io,SSL_get_SSL_CTX(con));
			BIO_printf(io,"---\n");
			peer=SSL_get_peer_certificate(con);
			if (peer != NULL)
				{
				BIO_printf(io,"Client certificate\n");
				X509_print(io,peer);
				PEM_write_bio_X509(io,peer);
				}
			else
				BIO_puts(io,"no client certificate available\n");
			BIO_puts(io,"\r\n\r\n");
			break;
			}
		else if ((www == 2 || www == 3)
                         && (strncmp("GET /",buf,5) == 0))
			{
			BIO *file;
			char *p,*e;
			static char *text="HTTP/1.0 200 ok\r\nContent-type: text/plain\r\n\r\n";

			/* skip the '/' */
			p= &(buf[5]);

			dot = 1;
			for (e=p; *e != '\0'; e++)
				{
				if (e[0] == ' ')
					break;

				switch (dot)
					{
				case 1:
					dot = (e[0] == '.') ? 2 : 0;
					break;
				case 2:
					dot = (e[0] == '.') ? 3 : 0;
					break;
				case 3:
					dot = (e[0] == '/') ? -1 : 0;
					break;
					}
				if (dot == 0)
					dot = (e[0] == '/') ? 1 : 0;
				}
			dot = (dot == 3) || (dot == -1); /* filename contains ".." component */

			if (*e == '\0')
				{
				BIO_puts(io,text);
				BIO_printf(io,"'%s' is an invalid file name\r\n",p);
				break;
				}
			*e='\0';

			if (dot)
				{
				BIO_puts(io,text);
				BIO_printf(io,"'%s' contains '..' reference\r\n",p);
				break;
				}

			if (*p == '/')
				{
				BIO_puts(io,text);
				BIO_printf(io,"'%s' is an invalid path\r\n",p);
				break;
				}

#if 0
			/* append if a directory lookup */
			if (e[-1] == '/')
				strcat(p,"index.html");
#endif

			/* if a directory, do the index thang */
			if (stat(p,&st_buf) < 0)
				{
				BIO_puts(io,text);
				BIO_printf(io,"Error accessing '%s'\r\n",p);
				ERR_print_errors(io);
				break;
				}
			if (S_ISDIR(st_buf.st_mode))
				{
#if 0 /* must check buffer size */
				strcat(p,"/index.html");
#else
				BIO_puts(io,text);
				BIO_printf(io,"'%s' is a directory\r\n",p);
				break;
#endif
				}

			if ((file=BIO_new_file(p,"r")) == NULL)
				{
				BIO_puts(io,text);
				BIO_printf(io,"Error opening '%s'\r\n",p);
				ERR_print_errors(io);
				break;
				}

			if (!s_quiet)
				BIO_printf(bio_err,"FILE:%s\n",p);

                        if (www == 2)
                                {
                                i=strlen(p);
                                if (	((i > 5) && (strcmp(&(p[i-5]),".html") == 0)) ||
                                        ((i > 4) && (strcmp(&(p[i-4]),".php") == 0)) ||
                                        ((i > 4) && (strcmp(&(p[i-4]),".htm") == 0)))
                                        BIO_puts(io,"HTTP/1.0 200 ok\r\nContent-type: text/html\r\n\r\n");
                                else
                                        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);
				if (i <= 0) break;

#ifdef RENEG
				total_bytes+=i;
				fprintf(stderr,"%d\n",i);
				if (total_bytes > 3*1024)
					{
					total_bytes=0;
					fprintf(stderr,"RENEGOTIATE\n");
					SSL_renegotiate(con);
					}
#endif

				for (j=0; j= 0)
		BIO_printf(bio_s_out,"ACCEPT\n");

	if (buf != NULL) OPENSSL_free(buf);
	if (io != NULL) BIO_free_all(io);
/*	if (ssl_bio != NULL) BIO_free(ssl_bio);*/
	return(ret);
	}

#ifndef OPENSSL_NO_RSA
static RSA MS_CALLBACK *tmp_rsa_cb(SSL *s, int is_export, int keylength)
	{
	static RSA *rsa_tmp=NULL;

	if (rsa_tmp == NULL)
		{
		if (!s_quiet)
			{
			BIO_printf(bio_err,"Generating temp (%d bit) RSA key...",keylength);
			(void)BIO_flush(bio_err);
			}
		rsa_tmp=RSA_generate_key(keylength,RSA_F4,NULL,NULL);
		if (!s_quiet)
			{
			BIO_printf(bio_err,"\n");
			(void)BIO_flush(bio_err);
			}
		}
	return(rsa_tmp);
	}
#endif

#define MAX_SESSION_ID_ATTEMPTS 10
static int generate_session_id(const SSL *ssl, unsigned char *id,
				unsigned int *id_len)
	{
	unsigned int count = 0;
	do	{
		RAND_pseudo_bytes(id, *id_len);
		/* Prefix the session_id with the required prefix. NB: If our
		 * prefix is too long, clip it - but there will be worse effects
		 * anyway, eg. the server could only possibly create 1 session
		 * ID (ie. the prefix!) so all future session negotiations will
		 * fail due to conflicts. */
		memcpy(id, session_id_prefix,
			(strlen(session_id_prefix) < *id_len) ?
			strlen(session_id_prefix) : *id_len);
		}
	while(SSL_has_matching_session_id(ssl, id, *id_len) &&
		(++count < MAX_SESSION_ID_ATTEMPTS));
	if(count >= MAX_SESSION_ID_ATTEMPTS)
		return 0;
	return 1;
	}