/* 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) 1998-2006 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). * */ /* ==================================================================== * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. * ECC cipher suite support in OpenSSL originally developed by * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. */ /* ==================================================================== * Copyright 2005 Nokia. All rights reserved. * * The portions of the attached software ("Contribution") is developed by * Nokia Corporation and is licensed pursuant to the OpenSSL open source * license. * * The Contribution, originally written by Mika Kousa and Pasi Eronen of * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites * support (see RFC 4279) to OpenSSL. * * No patent licenses or other rights except those expressly stated in * the OpenSSL open source license shall be deemed granted or received * expressly, by implication, estoppel, or otherwise. * * No assurances are provided by Nokia that the Contribution does not * infringe the patent or other intellectual property rights of any third * party or that the license provides you with all the necessary rights * to make use of the Contribution. * * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR * OTHERWISE. */ /* * Until the key-gen callbacks are modified to use newer prototypes, we allow * deprecated functions for openssl-internal code */ #ifdef OPENSSL_NO_DEPRECATED # undef OPENSSL_NO_DEPRECATED #endif #include #include #include #include #include #include #ifdef OPENSSL_NO_STDIO # define APPS_WIN16 #endif /* conflicts with winsock2 stuff on netware */ #if !defined(OPENSSL_SYS_NETWARE) # include #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 #ifndef OPENSSL_NO_DH # include #endif #ifndef OPENSSL_NO_RSA # include #endif #ifndef OPENSSL_NO_SRP # include #endif #include "s_apps.h" #include "timeouts.h" #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 #if defined(OPENSSL_SYS_BEOS_R5) # include #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(const char *dhfile); static DH *get_dh2048(void); #endif #ifdef MONOLITH static void s_server_init(void); #endif #ifndef OPENSSL_NO_DH static unsigned char dh2048_p[] = { 0xF6,0x42,0x57,0xB7,0x08,0x7F,0x08,0x17,0x72,0xA2,0xBA,0xD6, 0xA9,0x42,0xF3,0x05,0xE8,0xF9,0x53,0x11,0x39,0x4F,0xB6,0xF1, 0x6E,0xB9,0x4B,0x38,0x20,0xDA,0x01,0xA7,0x56,0xA3,0x14,0xE9, 0x8F,0x40,0x55,0xF3,0xD0,0x07,0xC6,0xCB,0x43,0xA9,0x94,0xAD, 0xF7,0x4C,0x64,0x86,0x49,0xF8,0x0C,0x83,0xBD,0x65,0xE9,0x17, 0xD4,0xA1,0xD3,0x50,0xF8,0xF5,0x59,0x5F,0xDC,0x76,0x52,0x4F, 0x3D,0x3D,0x8D,0xDB,0xCE,0x99,0xE1,0x57,0x92,0x59,0xCD,0xFD, 0xB8,0xAE,0x74,0x4F,0xC5,0xFC,0x76,0xBC,0x83,0xC5,0x47,0x30, 0x61,0xCE,0x7C,0xC9,0x66,0xFF,0x15,0xF9,0xBB,0xFD,0x91,0x5E, 0xC7,0x01,0xAA,0xD3,0x5B,0x9E,0x8D,0xA0,0xA5,0x72,0x3A,0xD4, 0x1A,0xF0,0xBF,0x46,0x00,0x58,0x2B,0xE5,0xF4,0x88,0xFD,0x58, 0x4E,0x49,0xDB,0xCD,0x20,0xB4,0x9D,0xE4,0x91,0x07,0x36,0x6B, 0x33,0x6C,0x38,0x0D,0x45,0x1D,0x0F,0x7C,0x88,0xB3,0x1C,0x7C, 0x5B,0x2D,0x8E,0xF6,0xF3,0xC9,0x23,0xC0,0x43,0xF0,0xA5,0x5B, 0x18,0x8D,0x8E,0xBB,0x55,0x8C,0xB8,0x5D,0x38,0xD3,0x34,0xFD, 0x7C,0x17,0x57,0x43,0xA3,0x1D,0x18,0x6C,0xDE,0x33,0x21,0x2C, 0xB5,0x2A,0xFF,0x3C,0xE1,0xB1,0x29,0x40,0x18,0x11,0x8D,0x7C, 0x84,0xA7,0x0A,0x72,0xD6,0x86,0xC4,0x03,0x19,0xC8,0x07,0x29, 0x7A,0xCA,0x95,0x0C,0xD9,0x96,0x9F,0xAB,0xD0,0x0A,0x50,0x9B, 0x02,0x46,0xD3,0x08,0x3D,0x66,0xA4,0x5D,0x41,0x9F,0x9C,0x7C, 0xBD,0x89,0x4B,0x22,0x19,0x26,0xBA,0xAB,0xA2,0x5E,0xC3,0x55, 0xE9,0x32,0x0B,0x3B, }; static unsigned char dh2048_g[] = { 0x02, }; DH *get_dh2048() { DH *dh; if ((dh = DH_new()) == NULL) return NULL; dh->p=BN_bin2bn(dh2048_p, sizeof(dh2048_p), NULL); dh->g=BN_bin2bn(dh2048_g, sizeof(dh2048_g), NULL); if (dh->p == NULL || dh->g == NULL) { DH_free(dh); 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" #ifndef OPENSSL_NO_TLSEXT # define TEST_CERT2 "server2.pem" #endif #undef PROG #define PROG s_server_main extern int verify_depth, verify_return_error; static char *cipher = NULL; static int s_server_verify = SSL_VERIFY_NONE; static int s_server_session_id_context = 1; /* anything will do */ static const char *s_cert_file = TEST_CERT, *s_key_file = NULL; #ifndef OPENSSL_NO_TLSEXT static const char *s_cert_file2 = TEST_CERT2, *s_key_file2 = NULL; #endif 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; #ifndef OPENSSL_NO_TLSEXT static SSL_CTX *ctx2 = NULL; #endif static int www = 0; static BIO *bio_s_out = NULL; static int s_debug = 0; #ifndef OPENSSL_NO_TLSEXT static int s_tlsextdebug = 0; static int s_tlsextstatus = 0; static int cert_status_cb(SSL *s, void *arg); #endif static int s_msg = 0; static int s_quiet = 0; static char *keymatexportlabel = NULL; static int keymatexportlen = 20; static int hack = 0; #ifndef OPENSSL_NO_ENGINE static char *engine_id = NULL; #endif static const char *session_id_prefix = NULL; static int enable_timeouts = 0; static long socket_mtu; #ifndef OPENSSL_NO_DTLS1 static int cert_chain = 0; #endif #ifndef OPENSSL_NO_PSK static char *psk_identity = "Client_identity"; char *psk_key = NULL; /* by default PSK is not used */ static unsigned int psk_server_cb(SSL *ssl, const char *identity, unsigned char *psk, unsigned int max_psk_len) { unsigned int psk_len = 0; int ret; BIGNUM *bn = NULL; if (s_debug) BIO_printf(bio_s_out, "psk_server_cb\n"); if (!identity) { BIO_printf(bio_err, "Error: client did not send PSK identity\n"); goto out_err; } if (s_debug) BIO_printf(bio_s_out, "identity_len=%d identity=%s\n", (int)strlen(identity), identity); /* here we could lookup the given identity e.g. from a database */ if (strcmp(identity, psk_identity) != 0) { BIO_printf(bio_s_out, "PSK error: client identity not found" " (got '%s' expected '%s')\n", identity, psk_identity); goto out_err; } if (s_debug) BIO_printf(bio_s_out, "PSK client identity found\n"); /* convert the PSK key to binary */ ret = BN_hex2bn(&bn, psk_key); if (!ret) { BIO_printf(bio_err, "Could not convert PSK key '%s' to BIGNUM\n", psk_key); if (bn) BN_free(bn); return 0; } if (BN_num_bytes(bn) > (int)max_psk_len) { BIO_printf(bio_err, "psk buffer of callback is too small (%d) for key (%d)\n", max_psk_len, BN_num_bytes(bn)); BN_free(bn); return 0; } ret = BN_bn2bin(bn, psk); BN_free(bn); if (ret < 0) goto out_err; psk_len = (unsigned int)ret; if (s_debug) BIO_printf(bio_s_out, "fetched PSK len=%d\n", psk_len); return psk_len; out_err: if (s_debug) BIO_printf(bio_err, "Error in PSK server callback\n"); return 0; } #endif #ifndef OPENSSL_NO_SRP /* This is a context that we pass to callbacks */ typedef struct srpsrvparm_st { char *login; SRP_VBASE *vb; SRP_user_pwd *user; } srpsrvparm; /* * This callback pretends to require some asynchronous logic in order to * obtain a verifier. When the callback is called for a new connection we * return with a negative value. This will provoke the accept etc to return * with an LOOKUP_X509. The main logic of the reinvokes the suspended call * (which would normally occur after a worker has finished) and we set the * user parameters. */ static int MS_CALLBACK ssl_srp_server_param_cb(SSL *s, int *ad, void *arg) { srpsrvparm *p = (srpsrvparm *) arg; int ret = SSL3_AL_FATAL; if (p->login == NULL && p->user == NULL) { p->login = SSL_get_srp_username(s); BIO_printf(bio_err, "SRP username = \"%s\"\n", p->login); return (-1); } if (p->user == NULL) { BIO_printf(bio_err, "User %s doesn't exist\n", p->login); goto err; } if (SSL_set_srp_server_param (s, p->user->N, p->user->g, p->user->s, p->user->v, p->user->info) < 0) { *ad = SSL_AD_INTERNAL_ERROR; goto err; } BIO_printf(bio_err, "SRP parameters set: username = \"%s\" info=\"%s\" \n", p->login, p->user->info); ret = SSL_ERROR_NONE; err: SRP_user_pwd_free(p->user); p->user = NULL; p->login = NULL; return ret; } #endif #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; # ifndef OPENSSL_NO_TLSEXT s_cert_file2 = TEST_CERT2; s_key_file2 = NULL; ctx2 = NULL; # endif # 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; # ifndef OPENSSL_NO_ENGINE engine_id = NULL; # endif } #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, " -verify_return_error - return verification errors\n"); BIO_printf(bio_err, " -cert arg - certificate file to use\n"); BIO_printf(bio_err, " (default is %s)\n", TEST_CERT); BIO_printf(bio_err, " -crl_check - check the peer certificate has not been revoked by its CA.\n" " The CRL(s) are appended to the certificate file\n"); BIO_printf(bio_err, " -crl_check_all - check the peer certificate has not been revoked by its CA\n" " or any other CRL in the CA chain. CRL(s) are appened to the\n" " the certificate file.\n"); BIO_printf(bio_err, " -certform arg - certificate format (PEM or DER) PEM default\n"); BIO_printf(bio_err, " -key arg - Private Key file to use, in cert file if\n"); BIO_printf(bio_err, " not specified (default is %s)\n", TEST_CERT); BIO_printf(bio_err, " -keyform arg - key format (PEM, DER or ENGINE) PEM default\n"); BIO_printf(bio_err, " -pass arg - private key file pass phrase source\n"); BIO_printf(bio_err, " -dcert arg - second certificate file to use (usually for DSA)\n"); BIO_printf(bio_err, " -dcertform x - second certificate format (PEM or DER) PEM default\n"); BIO_printf(bio_err, " -dkey arg - second private key file to use (usually for DSA)\n"); BIO_printf(bio_err, " -dkeyform arg - second key format (PEM, DER or ENGINE) PEM default\n"); BIO_printf(bio_err, " -dpass arg - second private key file pass phrase source\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"); #ifndef OPENSSL_NO_ECDH BIO_printf(bio_err, " -named_curve arg - Elliptic curve name to use for ephemeral ECDH keys.\n" " Use \"openssl ecparam -list_curves\" for all names\n" " (default is nistp256).\n"); #endif #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, " -no_alt_chains - only ever use the first certificate chain found\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"); #ifndef OPENSSL_NO_PSK BIO_printf(bio_err, " -psk_hint arg - PSK identity hint to use\n"); BIO_printf(bio_err, " -psk arg - PSK in hex (without 0x)\n"); # 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, " -srpvfile file - The verifier file for SRP\n"); BIO_printf(bio_err, " -srpuserseed string - A seed string for a default user salt.\n"); #endif BIO_printf(bio_err, " -ssl2 - Just talk SSLv2\n"); #ifndef OPENSSL_NO_SSL3_METHOD BIO_printf(bio_err, " -ssl3 - Just talk SSLv3\n"); #endif BIO_printf(bio_err, " -tls1_2 - Just talk TLSv1.2\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"); BIO_printf(bio_err, " -mtu - Set link layer MTU\n"); BIO_printf(bio_err, " -chain - Read a certificate chain\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"); BIO_printf(bio_err, " -no_tls1_1 - Just disable TLSv1.1\n"); BIO_printf(bio_err, " -no_tls1_2 - Just disable TLSv1.2\n"); #ifndef OPENSSL_NO_DH BIO_printf(bio_err, " -no_dhe - Disable ephemeral DH\n"); #endif #ifndef OPENSSL_NO_ECDH BIO_printf(bio_err, " -no_ecdhe - Disable ephemeral ECDH\n"); #endif BIO_printf(bio_err, " -bugs - Turn on SSL bug compatibility\n"); BIO_printf(bio_err, " -hack - workaround for early Netscape code\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"); #ifndef OPENSSL_NO_ENGINE BIO_printf(bio_err, " -engine id - Initialise and use the specified engine\n"); #endif 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); #ifndef OPENSSL_NO_TLSEXT BIO_printf(bio_err, " -servername host - servername for HostName TLS extension\n"); BIO_printf(bio_err, " -servername_fatal - on mismatch send fatal alert (default warning alert)\n"); BIO_printf(bio_err, " -cert2 arg - certificate file to use for servername\n"); BIO_printf(bio_err, " (default is %s)\n", TEST_CERT2); BIO_printf(bio_err, " -key2 arg - Private Key file to use for servername, in cert file if\n"); BIO_printf(bio_err, " not specified (default is %s)\n", TEST_CERT2); 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 # ifndef OPENSSL_NO_SRTP BIO_printf(bio_err, " -use_srtp profiles - Offer SRTP key management with a colon-separated profile list\n"); # endif #endif BIO_printf(bio_err, " -keymatexport label - Export keying material using label\n"); BIO_printf(bio_err, " -keymatexportlen len - Export len bytes of keying material (default 20)\n"); BIO_printf(bio_err, " -status - respond to certificate status requests\n"); BIO_printf(bio_err, " -status_verbose - enable status request verbose printout\n"); BIO_printf(bio_err, " -status_timeout n - status request responder timeout\n"); BIO_printf(bio_err, " -status_url URL - status request fallback URL\n"); } 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, const char *in, int inl); static long ebcdic_ctrl(BIO *b, int cmd, long num, void *ptr); static int ebcdic_gets(BIO *bp, char *buf, int size); static int ebcdic_puts(BIO *bp, const 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); if (!wbuf) return 0; 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, const 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; wbuf = (EBCDIC_OUTBUFF *) OPENSSL_malloc(sizeof(EBCDIC_OUTBUFF) + num); if (!wbuf) return 0; OPENSSL_free(b->ptr); 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, void *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 = 0; if (bp->next_bio == NULL) return (0); /* return(BIO_gets(bp->next_bio,buf,size));*/ for (i = 0; i < size - 1; ++i) { ret = ebcdic_read(bp, &buf[i], 1); if (ret <= 0) break; else if (buf[i] == '\n') { ++i; break; } } if (i < size) buf[i] = '\0'; return (ret < 0 && i == 0) ? ret : i; } static int ebcdic_puts(BIO *bp, const char *str) { if (bp->next_bio == NULL) return (0); return ebcdic_write(bp, str, strlen(str)); } #endif #ifndef OPENSSL_NO_TLSEXT /* This is a context that we pass to callbacks */ typedef struct tlsextctx_st { char *servername; BIO *biodebug; int extension_error; } tlsextctx; static int MS_CALLBACK ssl_servername_cb(SSL *s, int *ad, void *arg) { tlsextctx *p = (tlsextctx *) arg; const char *servername = SSL_get_servername(s, TLSEXT_NAMETYPE_host_name); if (servername && p->biodebug) BIO_printf(p->biodebug, "Hostname in TLS extension: \"%s\"\n", servername); if (!p->servername) return SSL_TLSEXT_ERR_NOACK; if (servername) { if (strcasecmp(servername, p->servername)) return p->extension_error; if (ctx2) { BIO_printf(p->biodebug, "Switching server context.\n"); SSL_set_SSL_CTX(s, ctx2); } } return SSL_TLSEXT_ERR_OK; } /* Structure passed to cert status callback */ typedef struct tlsextstatusctx_st { /* Default responder to use */ char *host, *path, *port; int use_ssl; int timeout; BIO *err; int verbose; } tlsextstatusctx; static tlsextstatusctx tlscstatp = { NULL, NULL, NULL, 0, -1, NULL, 0 }; /* * Certificate Status callback. This is called when a client includes a * certificate status request extension. This is a simplified version. It * examines certificates each time and makes one OCSP responder query for * each request. A full version would store details such as the OCSP * certificate IDs and minimise the number of OCSP responses by caching them * until they were considered "expired". */ static int cert_status_cb(SSL *s, void *arg) { tlsextstatusctx *srctx = arg; BIO *err = srctx->err; char *host, *port, *path; int use_ssl; unsigned char *rspder = NULL; int rspderlen; STACK_OF(OPENSSL_STRING) *aia = NULL; X509 *x = NULL; X509_STORE_CTX inctx; X509_OBJECT obj; OCSP_REQUEST *req = NULL; OCSP_RESPONSE *resp = NULL; OCSP_CERTID *id = NULL; STACK_OF(X509_EXTENSION) *exts; int ret = SSL_TLSEXT_ERR_NOACK; int i; # if 0 STACK_OF(OCSP_RESPID) *ids; SSL_get_tlsext_status_ids(s, &ids); BIO_printf(err, "cert_status: received %d ids\n", sk_OCSP_RESPID_num(ids)); # endif if (srctx->verbose) BIO_puts(err, "cert_status: callback called\n"); /* Build up OCSP query from server certificate */ x = SSL_get_certificate(s); aia = X509_get1_ocsp(x); if (aia) { if (!OCSP_parse_url(sk_OPENSSL_STRING_value(aia, 0), &host, &port, &path, &use_ssl)) { BIO_puts(err, "cert_status: can't parse AIA URL\n"); goto err; } if (srctx->verbose) BIO_printf(err, "cert_status: AIA URL: %s\n", sk_OPENSSL_STRING_value(aia, 0)); } else { if (!srctx->host) { BIO_puts(srctx->err, "cert_status: no AIA and no default responder URL\n"); goto done; } host = srctx->host; path = srctx->path; port = srctx->port; use_ssl = srctx->use_ssl; } if (!X509_STORE_CTX_init(&inctx, SSL_CTX_get_cert_store(SSL_get_SSL_CTX(s)), NULL, NULL)) goto err; if (X509_STORE_get_by_subject(&inctx, X509_LU_X509, X509_get_issuer_name(x), &obj) <= 0) { BIO_puts(err, "cert_status: Can't retrieve issuer certificate.\n"); X509_STORE_CTX_cleanup(&inctx); goto done; } req = OCSP_REQUEST_new(); if (!req) goto err; id = OCSP_cert_to_id(NULL, x, obj.data.x509); X509_free(obj.data.x509); X509_STORE_CTX_cleanup(&inctx); if (!id) goto err; if (!OCSP_request_add0_id(req, id)) goto err; id = NULL; /* Add any extensions to the request */ SSL_get_tlsext_status_exts(s, &exts); for (i = 0; i < sk_X509_EXTENSION_num(exts); i++) { X509_EXTENSION *ext = sk_X509_EXTENSION_value(exts, i); if (!OCSP_REQUEST_add_ext(req, ext, -1)) goto err; } resp = process_responder(err, req, host, path, port, use_ssl, NULL, srctx->timeout); if (!resp) { BIO_puts(err, "cert_status: error querying responder\n"); goto done; } rspderlen = i2d_OCSP_RESPONSE(resp, &rspder); if (rspderlen <= 0) goto err; SSL_set_tlsext_status_ocsp_resp(s, rspder, rspderlen); if (srctx->verbose) { BIO_puts(err, "cert_status: ocsp response sent:\n"); OCSP_RESPONSE_print(err, resp, 2); } ret = SSL_TLSEXT_ERR_OK; done: if (ret != SSL_TLSEXT_ERR_OK) ERR_print_errors(err); if (aia) { OPENSSL_free(host); OPENSSL_free(path); OPENSSL_free(port); X509_email_free(aia); } if (id) OCSP_CERTID_free(id); if (req) OCSP_REQUEST_free(req); if (resp) OCSP_RESPONSE_free(resp); return ret; err: 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_NEXTPROTONEG */ #endif int MAIN(int, char **); #ifndef OPENSSL_NO_JPAKE static char *jpake_secret = NULL; #endif #ifndef OPENSSL_NO_SRP static srpsrvparm srp_callback_parm; #endif #ifndef OPENSSL_NO_SRTP static char *srtp_profiles = NULL; #endif int MAIN(int argc, char *argv[]) { X509_VERIFY_PARAM *vpm = NULL; int badarg = 0; short port = PORT; char *CApath = NULL, *CAfile = NULL; unsigned char *context = NULL; char *dhfile = NULL; #ifndef OPENSSL_NO_ECDH char *named_curve = NULL; #endif int badop = 0, bugs = 0; int ret = 1; int off = 0; int no_tmp_rsa = 0, no_dhe = 0, nocert = 0; #ifndef OPENSSL_NO_ECDH int no_ecdhe = 0; #endif int state = 0; const SSL_METHOD *meth = NULL; int socket_type = SOCK_STREAM; ENGINE *e = NULL; char *inrand = NULL; int s_cert_format = FORMAT_PEM, s_key_format = FORMAT_PEM; char *passarg = NULL, *pass = NULL; char *dpassarg = NULL, *dpass = NULL; 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; #ifndef OPENSSL_NO_TLSEXT EVP_PKEY *s_key2 = NULL; X509 *s_cert2 = NULL; 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 */ static char *psk_identity_hint = NULL; #endif #ifndef OPENSSL_NO_SRP char *srpuserseed = NULL; char *srp_verifier_file = NULL; #endif meth = SSLv23_server_method(); 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 = (unsigned char *)*(++argv); } else if (strcmp(*argv, "-cert") == 0) { if (--argc < 1) goto bad; s_cert_file = *(++argv); } else if (strcmp(*argv, "-certform") == 0) { if (--argc < 1) goto bad; s_cert_format = str2fmt(*(++argv)); } else if (strcmp(*argv, "-key") == 0) { if (--argc < 1) goto bad; s_key_file = *(++argv); } else if (strcmp(*argv, "-keyform") == 0) { if (--argc < 1) goto bad; s_key_format = str2fmt(*(++argv)); } else if (strcmp(*argv, "-pass") == 0) { if (--argc < 1) goto bad; passarg = *(++argv); } else if (strcmp(*argv, "-dhparam") == 0) { if (--argc < 1) goto bad; dhfile = *(++argv); } #ifndef OPENSSL_NO_ECDH else if (strcmp(*argv, "-named_curve") == 0) { if (--argc < 1) goto bad; named_curve = *(++argv); } #endif else if (strcmp(*argv, "-dcertform") == 0) { if (--argc < 1) goto bad; s_dcert_format = str2fmt(*(++argv)); } else if (strcmp(*argv, "-dcert") == 0) { if (--argc < 1) goto bad; s_dcert_file = *(++argv); } else if (strcmp(*argv, "-dkeyform") == 0) { if (--argc < 1) goto bad; s_dkey_format = str2fmt(*(++argv)); } else if (strcmp(*argv, "-dpass") == 0) { if (--argc < 1) goto bad; dpassarg = *(++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, "-no_cache") == 0) no_cache = 1; 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, "-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, "-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; } #ifndef OPENSSL_NO_TLSEXT else if (strcmp(*argv, "-tlsextdebug") == 0) s_tlsextdebug = 1; else if (strcmp(*argv, "-status") == 0) s_tlsextstatus = 1; else if (strcmp(*argv, "-status_verbose") == 0) { s_tlsextstatus = 1; tlscstatp.verbose = 1; } else if (!strcmp(*argv, "-status_timeout")) { s_tlsextstatus = 1; if (--argc < 1) goto bad; tlscstatp.timeout = atoi(*(++argv)); } else if (!strcmp(*argv, "-status_url")) { s_tlsextstatus = 1; if (--argc < 1) goto bad; if (!OCSP_parse_url(*(++argv), &tlscstatp.host, &tlscstatp.port, &tlscstatp.path, &tlscstatp.use_ssl)) { BIO_printf(bio_err, "Error parsing URL\n"); goto bad; } } #endif 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; } #ifndef OPENSSL_NO_ECDH else if (strcmp(*argv, "-no_ecdhe") == 0) { no_ecdhe = 1; } #endif #ifndef OPENSSL_NO_PSK else if (strcmp(*argv, "-psk_hint") == 0) { if (--argc < 1) goto bad; psk_identity_hint = *(++argv); } else if (strcmp(*argv, "-psk") == 0) { size_t i; if (--argc < 1) goto bad; psk_key = *(++argv); for (i = 0; i < strlen(psk_key); i++) { if (isxdigit((unsigned char)psk_key[i])) continue; BIO_printf(bio_err, "Not a hex number '%s'\n", *argv); goto bad; } } #endif #ifndef OPENSSL_NO_SRP else if (strcmp(*argv, "-srpvfile") == 0) { if (--argc < 1) goto bad; srp_verifier_file = *(++argv); meth = TLSv1_server_method(); } else if (strcmp(*argv, "-srpuserseed") == 0) { if (--argc < 1) goto bad; srpuserseed = *(++argv); meth = TLSv1_server_method(); } #endif 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; } else if (strcmp(*argv, "-no_tls1_1") == 0) { off |= SSL_OP_NO_TLSv1_1; } else if (strcmp(*argv, "-no_tls1_2") == 0) { off |= SSL_OP_NO_TLSv1_2; } else if (strcmp(*argv, "-no_comp") == 0) { off |= SSL_OP_NO_COMPRESSION; } #ifndef OPENSSL_NO_TLSEXT else if (strcmp(*argv, "-no_ticket") == 0) { off |= SSL_OP_NO_TICKET; } #endif #ifndef OPENSSL_NO_SSL2 else if (strcmp(*argv, "-ssl2") == 0) { meth = SSLv2_server_method(); } #endif #ifndef OPENSSL_NO_SSL3_METHOD 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(); } else if (strcmp(*argv, "-tls1_1") == 0) { meth = TLSv1_1_server_method(); } else if (strcmp(*argv, "-tls1_2") == 0) { meth = TLSv1_2_server_method(); } #endif #ifndef OPENSSL_NO_DTLS1 else if (strcmp(*argv, "-dtls1") == 0) { meth = DTLSv1_server_method(); socket_type = SOCK_DGRAM; } else if (strcmp(*argv, "-timeout") == 0) enable_timeouts = 1; else if (strcmp(*argv, "-mtu") == 0) { if (--argc < 1) goto bad; socket_mtu = atol(*(++argv)); } else if (strcmp(*argv, "-chain") == 0) cert_chain = 1; #endif else if (strcmp(*argv, "-id_prefix") == 0) { if (--argc < 1) goto bad; session_id_prefix = *(++argv); } #ifndef OPENSSL_NO_ENGINE else if (strcmp(*argv, "-engine") == 0) { if (--argc < 1) goto bad; engine_id = *(++argv); } #endif else if (strcmp(*argv, "-rand") == 0) { if (--argc < 1) goto bad; inrand = *(++argv); } #ifndef OPENSSL_NO_TLSEXT else if (strcmp(*argv, "-servername") == 0) { if (--argc < 1) goto bad; tlsextcbp.servername = *(++argv); } else if (strcmp(*argv, "-servername_fatal") == 0) { tlsextcbp.extension_error = SSL_TLSEXT_ERR_ALERT_FATAL; } else if (strcmp(*argv, "-cert2") == 0) { if (--argc < 1) goto bad; s_cert_file2 = *(++argv); } else if (strcmp(*argv, "-key2") == 0) { 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) { if (--argc < 1) goto bad; jpake_secret = *(++argv); } #endif #ifndef OPENSSL_NO_SRTP else if (strcmp(*argv, "-use_srtp") == 0) { if (--argc < 1) goto bad; srtp_profiles = *(++argv); } #endif else if (strcmp(*argv, "-keymatexport") == 0) { if (--argc < 1) goto bad; keymatexportlabel = *(++argv); } else if (strcmp(*argv, "-keymatexportlen") == 0) { if (--argc < 1) goto bad; keymatexportlen = atoi(*(++argv)); if (keymatexportlen == 0) goto bad; } else { BIO_printf(bio_err, "unknown option %s\n", *argv); badop = 1; break; } argc--; argv++; } if (badop) { bad: sv_usage(); goto end; } #ifndef OPENSSL_NO_DTLS1 if (www && socket_type == SOCK_DGRAM) { BIO_printf(bio_err, "Can't use -HTTP, -www or -WWW with DTLS\n"); goto end; } #endif #if !defined(OPENSSL_NO_JPAKE) && !defined(OPENSSL_NO_PSK) if (jpake_secret) { if (psk_key) { BIO_printf(bio_err, "Can't use JPAKE and PSK together\n"); goto end; } psk_identity = "JPAKE"; if (cipher) { BIO_printf(bio_err, "JPAKE sets cipher to PSK\n"); goto end; } cipher = "PSK"; } #endif SSL_load_error_strings(); OpenSSL_add_ssl_algorithms(); #ifndef OPENSSL_NO_ENGINE e = setup_engine(bio_err, engine_id, 1); #endif if (!app_passwd(bio_err, passarg, dpassarg, &pass, &dpass)) { BIO_printf(bio_err, "Error getting password\n"); goto end; } if (s_key_file == NULL) s_key_file = s_cert_file; #ifndef OPENSSL_NO_TLSEXT if (s_key_file2 == NULL) s_key_file2 = s_cert_file2; #endif if (nocert == 0) { s_key = load_key(bio_err, s_key_file, s_key_format, 0, pass, e, "server certificate private key file"); if (!s_key) { ERR_print_errors(bio_err); goto end; } s_cert = load_cert(bio_err, s_cert_file, s_cert_format, NULL, e, "server certificate file"); if (!s_cert) { ERR_print_errors(bio_err); goto end; } #ifndef OPENSSL_NO_TLSEXT if (tlsextcbp.servername) { s_key2 = load_key(bio_err, s_key_file2, s_key_format, 0, pass, e, "second server certificate private key file"); if (!s_key2) { ERR_print_errors(bio_err); goto end; } s_cert2 = load_cert(bio_err, s_cert_file2, s_cert_format, NULL, e, "second server certificate file"); if (!s_cert2) { ERR_print_errors(bio_err); goto end; } } #endif } #if !defined(OPENSSL_NO_TLSEXT) && !defined(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 if (s_dcert_file) { if (s_dkey_file == NULL) s_dkey_file = s_dcert_file; s_dkey = load_key(bio_err, s_dkey_file, s_dkey_format, 0, dpass, e, "second certificate private key file"); if (!s_dkey) { ERR_print_errors(bio_err); goto end; } s_dcert = load_cert(bio_err, s_dcert_file, s_dcert_format, NULL, e, "second server certificate file"); if (!s_dcert) { ERR_print_errors(bio_err); goto end; } } 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) || !defined(OPENSSL_NO_ECDSA) if (nocert) #endif { s_cert_file = NULL; s_key_file = NULL; s_dcert_file = NULL; s_dkey_file = NULL; #ifndef OPENSSL_NO_TLSEXT s_cert_file2 = NULL; s_key_file2 = NULL; #endif } 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); if (no_cache) SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_OFF); else SSL_CTX_sess_set_cache_size(ctx, 128); #ifndef OPENSSL_NO_SRTP if (srtp_profiles != NULL) SSL_CTX_set_tlsext_use_srtp(ctx, srtp_profiles); #endif #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; */ } if (vpm) SSL_CTX_set1_param(ctx, vpm); #ifndef OPENSSL_NO_TLSEXT if (s_cert2) { ctx2 = SSL_CTX_new(meth); if (ctx2 == NULL) { ERR_print_errors(bio_err); goto end; } } if (ctx2) { BIO_printf(bio_s_out, "Setting secondary ctx parameters\n"); 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(ctx2, 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(ctx2, 1); if (bugs) SSL_CTX_set_options(ctx2, SSL_OP_ALL); if (hack) SSL_CTX_set_options(ctx2, SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG); SSL_CTX_set_options(ctx2, off); if (state) SSL_CTX_set_info_callback(ctx2, apps_ssl_info_callback); if (no_cache) SSL_CTX_set_session_cache_mode(ctx2, SSL_SESS_CACHE_OFF); else SSL_CTX_sess_set_cache_size(ctx2, 128); if ((!SSL_CTX_load_verify_locations(ctx2, CAfile, CApath)) || (!SSL_CTX_set_default_verify_paths(ctx2))) { ERR_print_errors(bio_err); } 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 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_dh2048(); if (dh == NULL) { ERR_print_errors(bio_err); goto end; } } (void)BIO_flush(bio_s_out); SSL_CTX_set_tmp_dh(ctx, dh); # ifndef OPENSSL_NO_TLSEXT if (ctx2) { if (!dhfile) { DH *dh2 = load_dh_param(s_cert_file2); if (dh2 != NULL) { BIO_printf(bio_s_out, "Setting temp DH parameters\n"); (void)BIO_flush(bio_s_out); DH_free(dh); dh = dh2; } } SSL_CTX_set_tmp_dh(ctx2, dh); } # endif DH_free(dh); } #endif #ifndef OPENSSL_NO_ECDH if (!no_ecdhe) { EC_KEY *ecdh = NULL; if (named_curve) { int nid = OBJ_sn2nid(named_curve); if (nid == 0) { BIO_printf(bio_err, "unknown curve name (%s)\n", named_curve); goto end; } ecdh = EC_KEY_new_by_curve_name(nid); if (ecdh == NULL) { BIO_printf(bio_err, "unable to create curve (%s)\n", named_curve); goto end; } } if (ecdh != NULL) { BIO_printf(bio_s_out, "Setting temp ECDH parameters\n"); } else { BIO_printf(bio_s_out, "Using default temp ECDH parameters\n"); ecdh = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1); if (ecdh == NULL) { BIO_printf(bio_err, "unable to create curve (nistp256)\n"); goto end; } } (void)BIO_flush(bio_s_out); SSL_CTX_set_tmp_ecdh(ctx, ecdh); # ifndef OPENSSL_NO_TLSEXT if (ctx2) SSL_CTX_set_tmp_ecdh(ctx2, ecdh); # endif EC_KEY_free(ecdh); } #endif if (!set_cert_key_stuff(ctx, s_cert, s_key)) goto end; #ifndef OPENSSL_NO_TLSEXT if (ctx2 && !set_cert_key_stuff(ctx2, s_cert2, s_key2)) goto end; #endif if (s_dcert != NULL) { if (!set_cert_key_stuff(ctx, s_dcert, s_dkey)) goto end; } #ifndef OPENSSL_NO_RSA # if 1 if (!no_tmp_rsa) { SSL_CTX_set_tmp_rsa_callback(ctx, tmp_rsa_cb); # ifndef OPENSSL_NO_TLSEXT if (ctx2) SSL_CTX_set_tmp_rsa_callback(ctx2, tmp_rsa_cb); # endif } # 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; } # ifndef OPENSSL_NO_TLSEXT if (ctx2) { if (!SSL_CTX_set_tmp_rsa(ctx2, rsa)) { ERR_print_errors(bio_err); goto end; } } # endif RSA_free(rsa); BIO_printf(bio_s_out, "\n"); } # endif #endif #ifndef OPENSSL_NO_PSK # ifdef OPENSSL_NO_JPAKE if (psk_key != NULL) # else if (psk_key != NULL || jpake_secret) # endif { if (s_debug) BIO_printf(bio_s_out, "PSK key given or JPAKE in use, setting server callback\n"); SSL_CTX_set_psk_server_callback(ctx, psk_server_cb); } if (!SSL_CTX_use_psk_identity_hint(ctx, psk_identity_hint)) { BIO_printf(bio_err, "error setting PSK identity hint to context\n"); ERR_print_errors(bio_err); goto end; } #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; } #ifndef OPENSSL_NO_TLSEXT if (ctx2 && !SSL_CTX_set_cipher_list(ctx2, cipher)) { BIO_printf(bio_err, "error setting cipher list\n"); ERR_print_errors(bio_err); goto end; } #endif } 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); /* Set DTLS cookie generation and verification callbacks */ SSL_CTX_set_cookie_generate_cb(ctx, generate_cookie_callback); SSL_CTX_set_cookie_verify_cb(ctx, verify_cookie_callback); #ifndef OPENSSL_NO_TLSEXT if (ctx2) { SSL_CTX_set_verify(ctx2, s_server_verify, verify_callback); SSL_CTX_set_session_id_context(ctx2, (void *)&s_server_session_id_context, sizeof s_server_session_id_context); tlsextcbp.biodebug = bio_s_out; SSL_CTX_set_tlsext_servername_callback(ctx2, ssl_servername_cb); SSL_CTX_set_tlsext_servername_arg(ctx2, &tlsextcbp); SSL_CTX_set_tlsext_servername_callback(ctx, ssl_servername_cb); SSL_CTX_set_tlsext_servername_arg(ctx, &tlsextcbp); } #endif #ifndef OPENSSL_NO_SRP if (srp_verifier_file != NULL) { srp_callback_parm.vb = SRP_VBASE_new(srpuserseed); srp_callback_parm.user = NULL; srp_callback_parm.login = NULL; if ((ret = SRP_VBASE_init(srp_callback_parm.vb, srp_verifier_file)) != SRP_NO_ERROR) { BIO_printf(bio_err, "Cannot initialize SRP verifier file \"%s\":ret=%d\n", srp_verifier_file, ret); goto end; } SSL_CTX_set_verify(ctx, SSL_VERIFY_NONE, verify_callback); SSL_CTX_set_srp_cb_arg(ctx, &srp_callback_parm); SSL_CTX_set_srp_username_callback(ctx, ssl_srp_server_param_cb); } else #endif if (CAfile != NULL) { SSL_CTX_set_client_CA_list(ctx, SSL_load_client_CA_file(CAfile)); #ifndef OPENSSL_NO_TLSEXT if (ctx2) SSL_CTX_set_client_CA_list(ctx2, SSL_load_client_CA_file(CAfile)); #endif } BIO_printf(bio_s_out, "ACCEPT\n"); (void)BIO_flush(bio_s_out); if (www) do_server(port, socket_type, &accept_socket, www_body, context); else do_server(port, socket_type, &accept_socket, sv_body, context); print_stats(bio_s_out, ctx); ret = 0; end: if (ctx != NULL) SSL_CTX_free(ctx); if (s_cert) X509_free(s_cert); if (s_dcert) X509_free(s_dcert); if (s_key) EVP_PKEY_free(s_key); if (s_dkey) EVP_PKEY_free(s_dkey); if (pass) OPENSSL_free(pass); if (dpass) OPENSSL_free(dpass); if (vpm) X509_VERIFY_PARAM_free(vpm); #ifndef OPENSSL_NO_TLSEXT if (tlscstatp.host) OPENSSL_free(tlscstatp.host); if (tlscstatp.port) OPENSSL_free(tlscstatp.port); if (tlscstatp.path) OPENSSL_free(tlscstatp.path); if (ctx2 != NULL) SSL_CTX_free(ctx2); if (s_cert2) X509_free(s_cert2); if (s_key2) EVP_PKEY_free(s_key2); #endif if (bio_s_out != NULL) { BIO_free(bio_s_out); bio_s_out = NULL; } apps_shutdown(); OPENSSL_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, "%4ld client connects (SSL_connect())\n", SSL_CTX_sess_connect(ssl_ctx)); BIO_printf(bio, "%4ld client renegotiates (SSL_connect())\n", SSL_CTX_sess_connect_renegotiate(ssl_ctx)); BIO_printf(bio, "%4ld client connects that finished\n", SSL_CTX_sess_connect_good(ssl_ctx)); BIO_printf(bio, "%4ld server accepts (SSL_accept())\n", SSL_CTX_sess_accept(ssl_ctx)); BIO_printf(bio, "%4ld server renegotiates (SSL_accept())\n", SSL_CTX_sess_accept_renegotiate(ssl_ctx)); BIO_printf(bio, "%4ld server accepts that finished\n", SSL_CTX_sess_accept_good(ssl_ctx)); BIO_printf(bio, "%4ld session cache hits\n", SSL_CTX_sess_hits(ssl_ctx)); BIO_printf(bio, "%4ld session cache misses\n", SSL_CTX_sess_misses(ssl_ctx)); BIO_printf(bio, "%4ld session cache timeouts\n", SSL_CTX_sess_timeouts(ssl_ctx)); BIO_printf(bio, "%4ld callback cache hits\n", SSL_CTX_sess_cb_hits(ssl_ctx)); BIO_printf(bio, "%4ld cache full overflows (%ld 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; #ifndef OPENSSL_NO_KRB5 KSSL_CTX *kctx; #endif struct timeval timeout; #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_NETWARE) || defined(OPENSSL_SYS_BEOS_R5) struct timeval tv; #else struct timeval *timeoutp; #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_TLSEXT if (s_tlsextdebug) { SSL_set_tlsext_debug_callback(con, tlsext_cb); SSL_set_tlsext_debug_arg(con, bio_s_out); } if (s_tlsextstatus) { SSL_CTX_set_tlsext_status_cb(ctx, cert_status_cb); tlscstatp.err = bio_err; SSL_CTX_set_tlsext_status_arg(ctx, &tlscstatp); } #endif #ifndef OPENSSL_NO_KRB5 if ((kctx = kssl_ctx_new()) != NULL) { SSL_set0_kssl_ctx(con, kctx); kssl_ctx_setstring(kctx, KSSL_SERVICE, KRB5SVC); kssl_ctx_setstring(kctx, KSSL_KEYTAB, KRB5KEYTAB); } #endif /* OPENSSL_NO_KRB5 */ if (context) SSL_set_session_id_context(con, context, strlen((char *)context)); } SSL_clear(con); #if 0 # ifdef TLSEXT_TYPE_opaque_prf_input SSL_set_tlsext_opaque_prf_input(con, "Test server", 11); # endif #endif if (SSL_version(con) == DTLS1_VERSION) { sbio = BIO_new_dgram(s, BIO_NOCLOSE); if (enable_timeouts) { timeout.tv_sec = 0; timeout.tv_usec = DGRAM_RCV_TIMEOUT; BIO_ctrl(sbio, BIO_CTRL_DGRAM_SET_RECV_TIMEOUT, 0, &timeout); timeout.tv_sec = 0; timeout.tv_usec = DGRAM_SND_TIMEOUT; BIO_ctrl(sbio, BIO_CTRL_DGRAM_SET_SEND_TIMEOUT, 0, &timeout); } if (socket_mtu) { if (socket_mtu < DTLS_get_link_min_mtu(con)) { BIO_printf(bio_err, "MTU too small. Must be at least %ld\n", DTLS_get_link_min_mtu(con)); ret = -1; BIO_free(sbio); goto err; } SSL_set_options(con, SSL_OP_NO_QUERY_MTU); if (!DTLS_set_link_mtu(con, socket_mtu)) { BIO_printf(bio_err, "Failed to set MTU\n"); ret = -1; BIO_free(sbio); goto err; } } else /* want to do MTU discovery */ BIO_ctrl(sbio, BIO_CTRL_DGRAM_MTU_DISCOVER, 0, NULL); /* turn on cookie exchange */ SSL_set_options(con, SSL_OP_COOKIE_EXCHANGE); } else 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); } #ifndef OPENSSL_NO_JPAKE if (jpake_secret) jpake_server_auth(bio_s_out, sbio, jpake_secret); #endif SSL_set_bio(con, sbio, sbio); SSL_set_accept_state(con); /* SSL_set_fd(con,s); */ if (s_debug) { SSL_set_debug(con, 1); BIO_set_callback(SSL_get_rbio(con), bio_dump_callback); BIO_set_callback_arg(SSL_get_rbio(con), (char *)bio_s_out); } if (s_msg) { SSL_set_msg_callback(con, msg_cb); SSL_set_msg_callback_arg(con, bio_s_out); } #ifndef OPENSSL_NO_TLSEXT if (s_tlsextdebug) { SSL_set_tlsext_debug_callback(con, tlsext_cb); SSL_set_tlsext_debug_arg(con, bio_s_out); } #endif 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); #if !defined(OPENSSL_SYS_WINDOWS) && !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_NETWARE) && !defined(OPENSSL_SYS_BEOS_R5) openssl_fdset(fileno(stdin), &readfds); #endif openssl_fdset(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 *). */ #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_NETWARE) /* * Under DOS (non-djgpp) and 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; #elif defined(OPENSSL_SYS_BEOS_R5) /* Under BeOS-R5 the situation is similar to DOS */ tv.tv_sec = 1; tv.tv_usec = 0; (void)fcntl(fileno(stdin), F_SETFL, O_NONBLOCK); i = select(width, (void *)&readfds, NULL, NULL, &tv); if ((i < 0) || (!i && read(fileno(stdin), buf, 0) < 0)) continue; if (read(fileno(stdin), buf, 0) >= 0) read_from_terminal = 1; (void)fcntl(fileno(stdin), F_SETFL, 0); #else if ((SSL_version(con) == DTLS1_VERSION) && DTLSv1_get_timeout(con, &timeout)) timeoutp = &timeout; else timeoutp = NULL; i = select(width, (void *)&readfds, NULL, NULL, timeoutp); if ((SSL_version(con) == DTLS1_VERSION) && DTLSv1_handle_timeout(con) > 0) { BIO_printf(bio_err, "TIMEOUT occured\n"); } 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 = raw_read_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 = raw_read_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"); if (SSL_version(con) != DTLS1_VERSION) SHUTDOWN(s); /* * close_accept_socket(); ret= -11; */ goto err; } #ifndef OPENSSL_NO_HEARTBEATS if ((buf[0] == 'B') && ((buf[1] == '\n') || (buf[1] == '\r'))) { BIO_printf(bio_err, "HEARTBEATING\n"); SSL_heartbeat(con); i = 0; continue; } #endif 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 const 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); #ifndef OPENSSL_NO_SRP while (SSL_get_error(con, k) == SSL_ERROR_WANT_X509_LOOKUP) { BIO_printf(bio_s_out, "LOOKUP renego during write\n"); SRP_user_pwd_free(srp_callback_parm.user); srp_callback_parm.user = SRP_VBASE_get1_by_user(srp_callback_parm.vb, srp_callback_parm.login); if (srp_callback_parm.user) BIO_printf(bio_s_out, "LOOKUP done %s\n", srp_callback_parm.user->info); else BIO_printf(bio_s_out, "LOOKUP not successful\n"); k = SSL_write(con, &(buf[l]), (unsigned int)i); } #endif 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; } if (k > 0) { 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); #ifndef OPENSSL_NO_SRP while (SSL_get_error(con, i) == SSL_ERROR_WANT_X509_LOOKUP) { BIO_printf(bio_s_out, "LOOKUP renego during read\n"); SRP_user_pwd_free(srp_callback_parm.user); srp_callback_parm.user = SRP_VBASE_get1_by_user(srp_callback_parm.vb, srp_callback_parm.login); if (srp_callback_parm.user) BIO_printf(bio_s_out, "LOOKUP done %s\n", srp_callback_parm.user->info); else BIO_printf(bio_s_out, "LOOKUP not successful\n"); i = SSL_read(con, (char *)buf, bufsize); } #endif switch (SSL_get_error(con, i)) { case SSL_ERROR_NONE: #ifdef CHARSET_EBCDIC ascii2ebcdic(buf, buf, i); #endif raw_write_stdout(buf, (unsigned int)i); if (SSL_pending(con)) goto again; break; case SSL_ERROR_WANT_WRITE: case SSL_ERROR_WANT_READ: 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: if (con != NULL) { 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 SSL_free(con); } BIO_printf(bio_s_out, "CONNECTION CLOSED\n"); if (buf != NULL) { OPENSSL_cleanse(buf, 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]; #ifndef OPENSSL_NO_KRB5 char *client_princ; #endif #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) const unsigned char *next_proto_neg; unsigned next_proto_neg_len; #endif unsigned char *exportedkeymat; i = SSL_accept(con); #ifndef OPENSSL_NO_SRP while (i <= 0 && SSL_get_error(con, i) == SSL_ERROR_WANT_X509_LOOKUP) { BIO_printf(bio_s_out, "LOOKUP during accept %s\n", srp_callback_parm.login); SRP_user_pwd_free(srp_callback_parm.user); srp_callback_parm.user = SRP_VBASE_get1_by_user(srp_callback_parm.vb, srp_callback_parm.login); if (srp_callback_parm.user) BIO_printf(bio_s_out, "LOOKUP done %s\n", srp_callback_parm.user->info); else BIO_printf(bio_s_out, "LOOKUP not successful\n"); i = SSL_accept(con); } #endif if (i <= 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, sizeof buf); BIO_printf(bio_s_out, "subject=%s\n", buf); X509_NAME_oneline(X509_get_issuer_name(peer), buf, sizeof buf); BIO_printf(bio_s_out, "issuer=%s\n", buf); X509_free(peer); } if (SSL_get_shared_ciphers(con, buf, sizeof buf) != 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 !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 #ifndef OPENSSL_NO_SRTP { SRTP_PROTECTION_PROFILE *srtp_profile = SSL_get_selected_srtp_profile(con); if (srtp_profile) BIO_printf(bio_s_out, "SRTP Extension negotiated, profile=%s\n", srtp_profile->name); } #endif if (SSL_cache_hit(con)) 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"); #ifndef OPENSSL_NO_KRB5 client_princ = kssl_ctx_get0_client_princ(SSL_get0_kssl_ctx(con)); if (client_princ != NULL) { BIO_printf(bio_s_out, "Kerberos peer principal is %s\n", client_princ); } #endif /* OPENSSL_NO_KRB5 */ BIO_printf(bio_s_out, "Secure Renegotiation IS%s supported\n", SSL_get_secure_renegotiation_support(con) ? "" : " NOT"); if (keymatexportlabel != NULL) { BIO_printf(bio_s_out, "Keying material exporter:\n"); BIO_printf(bio_s_out, " Label: '%s'\n", keymatexportlabel); BIO_printf(bio_s_out, " Length: %i bytes\n", keymatexportlen); exportedkeymat = OPENSSL_malloc(keymatexportlen); if (exportedkeymat != NULL) { if (!SSL_export_keying_material(con, exportedkeymat, keymatexportlen, keymatexportlabel, strlen(keymatexportlabel), NULL, 0, 0)) { BIO_printf(bio_s_out, " Error\n"); } else { BIO_printf(bio_s_out, " Keying material: "); for (i = 0; i < keymatexportlen; i++) BIO_printf(bio_s_out, "%02X", exportedkeymat[i]); BIO_printf(bio_s_out, "\n"); } OPENSSL_free(exportedkeymat); } } return (1); } #ifndef OPENSSL_NO_DH static DH *load_dh_param(const 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 #ifndef OPENSSL_NO_KRB5 char *client_princ; #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, dot; SSL *con; const SSL_CIPHER *c; BIO *io, *ssl_bio, *sbio; #ifndef OPENSSL_NO_KRB5 KSSL_CTX *kctx; #endif 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_TLSEXT if (s_tlsextdebug) { SSL_set_tlsext_debug_callback(con, tlsext_cb); SSL_set_tlsext_debug_arg(con, bio_s_out); } #endif #ifndef OPENSSL_NO_KRB5 if ((kctx = kssl_ctx_new()) != NULL) { kssl_ctx_setstring(kctx, KSSL_SERVICE, KRB5SVC); kssl_ctx_setstring(kctx, 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) { SSL_set_debug(con, 1); BIO_set_callback(SSL_get_rbio(con), bio_dump_callback); BIO_set_callback_arg(SSL_get_rbio(con), (char *)bio_s_out); } if (s_msg) { SSL_set_msg_callback(con, msg_cb); SSL_set_msg_callback_arg(con, bio_s_out); } for (;;) { if (hack) { i = SSL_accept(con); #ifndef OPENSSL_NO_SRP while (i <= 0 && SSL_get_error(con, i) == SSL_ERROR_WANT_X509_LOOKUP) { BIO_printf(bio_s_out, "LOOKUP during accept %s\n", srp_callback_parm.login); SRP_user_pwd_free(srp_callback_parm.user); srp_callback_parm.user = SRP_VBASE_get1_by_user(srp_callback_parm.vb, srp_callback_parm.login); if (srp_callback_parm.user) BIO_printf(bio_s_out, "LOOKUP done %s\n", srp_callback_parm.user->info); else BIO_printf(bio_s_out, "LOOKUP not successful\n"); i = SSL_accept(con); } #endif 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_NO_SRP if (BIO_should_io_special(io) && BIO_get_retry_reason(io) == BIO_RR_SSL_X509_LOOKUP) { BIO_printf(bio_s_out, "LOOKUP renego during read\n"); SRP_user_pwd_free(srp_callback_parm.user); srp_callback_parm.user = SRP_VBASE_get1_by_user(srp_callback_parm.vb, srp_callback_parm.login); if (srp_callback_parm.user) BIO_printf(bio_s_out, "LOOKUP done %s\n", srp_callback_parm.user->info); else BIO_printf(bio_s_out, "LOOKUP not successful\n"); continue; } #endif #if defined(OPENSSL_SYS_NETWARE) delay(1000); #elif !defined(OPENSSL_SYS_MSDOS) && !defined(__DJGPP__) 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, 11) == 0))) { char *p; X509 *peer; STACK_OF(SSL_CIPHER) *sk; static const 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; i < local_argc; i++) {
                BIO_puts(io, local_argv[i]);
                BIO_write(io, " ", 1);
            }
            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");
            sk = SSL_get_ciphers(con);
            j = sk_SSL_CIPHER_num(sk);
            for (i = 0; i < j; i++) {
                c = sk_SSL_CIPHER_value(sk, i);
                BIO_printf(io, "%-11s:%-25s",
                           SSL_CIPHER_get_version(c), SSL_CIPHER_get_name(c));
                if ((((i + 1) % 2) == 0) && (i + 1 != j))
                    BIO_puts(io, "\n");
            }
            BIO_puts(io, "\n");
            p = SSL_get_shared_ciphers(con, buf, bufsize);
            if (p != NULL) {
                BIO_printf(io,
                           "---\nCiphers common between both SSL end points:\n");
                j = i = 0;
                while (*p) {
                    if (*p == ':') {
                        BIO_write(io, space, 26 - j);
                        i++;
                        j = 0;
                        BIO_write(io, ((i % 3) ? " " : "\n"), 1);
                    } else {
                        BIO_write(io, p, 1);
                        j++;
                    }
                    p++;
                }
                BIO_puts(io, "\n");
            }
            BIO_printf(io, (SSL_cache_hit(con)
                            ? "---\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 const 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 (app_isdir(p) > 0) {
#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 */
            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 < i;) {
#ifdef RENEG
                    {
                        static count = 0;
                        if (++count == 13) {
                            SSL_renegotiate(con);
                        }
                    }
#endif
                    k = BIO_write(io, &(buf[j]), i - j);
                    if (k <= 0) {
                        if (!BIO_should_retry(io))
                            goto write_error;
                        else {
                            BIO_printf(bio_s_out, "rwrite W BLOCK\n");
                        }
                    } else {
                        j += k;
                    }
                }
            }
 write_error:
            BIO_free(file);
            break;
        }
    }

    for (;;) {
        i = (int)BIO_flush(io);
        if (i <= 0) {
            if (!BIO_should_retry(io))
                break;
        } else
            break;
    }
 end:
#if 1
    /* make sure we re-use sessions */
    SSL_set_shutdown(con, SSL_SENT_SHUTDOWN | SSL_RECEIVED_SHUTDOWN);
#else
    /* This kills performance */
    /*
     * SSL_shutdown(con); A shutdown gets sent in the BIO_free_all(io)
     * procession
     */
#endif

 err:

    if (ret >= 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)
{
    BIGNUM *bn = NULL;
    static RSA *rsa_tmp = NULL;

    if (!rsa_tmp && ((bn = BN_new()) == NULL))
        BIO_printf(bio_err, "Allocation error in generating RSA key\n");
    if (!rsa_tmp && bn) {
        if (!s_quiet) {
            BIO_printf(bio_err, "Generating temp (%d bit) RSA key...",
                       keylength);
            (void)BIO_flush(bio_err);
        }
        if (!BN_set_word(bn, RSA_F4) || ((rsa_tmp = RSA_new()) == NULL) ||
            !RSA_generate_key_ex(rsa_tmp, keylength, bn, NULL)) {
            if (rsa_tmp)
                RSA_free(rsa_tmp);
            rsa_tmp = NULL;
        }
        if (!s_quiet) {
            BIO_printf(bio_err, "\n");
            (void)BIO_flush(bio_err);
        }
        BN_free(bn);
    }
    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 {
        if (RAND_bytes(id, *id_len) <= 0)
            return 0;
        /*
         * 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;
}