[thirdparty/openssl.git] / demos / state_machine / state_machine.c

/* ====================================================================
 * Copyright (c) 2000 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).
 *
 */

/*
 * Nuron, a leader in hardware encryption technology, generously
 * sponsored the development of this demo by Ben Laurie.
 *
 * See http://www.nuron.com/.
 */

/*
 * the aim of this demo is to provide a fully working state-machine
 * style SSL implementation, i.e. one where the main loop acquires
 * some data, then converts it from or to SSL by feeding it into the
 * SSL state machine. It then does any I/O required by the state machine
 * and loops.
 *
 * In order to keep things as simple as possible, this implementation
 * listens on a TCP socket, which it expects to get an SSL connection
 * on (for example, from s_client) and from then on writes decrypted
 * data to stdout and encrypts anything arriving on stdin. Verbose
 * commentary is written to stderr.
 *
 * This implementation acts as a server, but it can also be done for a client.  */

#include <openssl/ssl.h>
#include <assert.h>
#include <unistd.h>
#include <string.h>
#include <openssl/err.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>

/* die_unless is intended to work like assert, except that it happens
   always, even if NDEBUG is defined. Use assert as a stopgap. */

#define die_unless(x)	assert(x)

typedef struct
    {
    SSL_CTX *pCtx;
    BIO *pbioRead;
    BIO *pbioWrite;
    SSL *pSSL;
    } SSLStateMachine;

void SSLStateMachine_print_error(SSLStateMachine *pMachine,const char *szErr)
    {
    unsigned long l;

    fprintf(stderr,"%s\n",szErr);
    while((l=ERR_get_error()))
	{
	char buf[1024];

	ERR_error_string_n(l,buf,sizeof buf);
	fprintf(stderr,"Error %lx: %s\n",l,buf);
	}
    }

SSLStateMachine *SSLStateMachine_new(const char *szCertificateFile,
				     const char *szKeyFile)
    {
    SSLStateMachine *pMachine=malloc(sizeof *pMachine);
    int n;

    die_unless(pMachine);

    pMachine->pCtx=SSL_CTX_new(SSLv23_server_method());
    die_unless(pMachine->pCtx);

    n=SSL_CTX_use_certificate_file(pMachine->pCtx,szCertificateFile,
				   SSL_FILETYPE_PEM);
    die_unless(n > 0);

    n=SSL_CTX_use_PrivateKey_file(pMachine->pCtx,szKeyFile,SSL_FILETYPE_PEM);
    die_unless(n > 0);

    pMachine->pSSL=SSL_new(pMachine->pCtx);
    die_unless(pMachine->pSSL);

    pMachine->pbioRead=BIO_new(BIO_s_mem());

    pMachine->pbioWrite=BIO_new(BIO_s_mem());

    SSL_set_bio(pMachine->pSSL,pMachine->pbioRead,pMachine->pbioWrite);

    SSL_set_accept_state(pMachine->pSSL);

    return pMachine;
    }

void SSLStateMachine_read_inject(SSLStateMachine *pMachine,
				 const unsigned char *aucBuf,int nBuf)
    {
    int n=BIO_write(pMachine->pbioRead,aucBuf,nBuf);
    /* If it turns out this assert fails, then buffer the data here
     * and just feed it in in churn instead. Seems to me that it
     * should be guaranteed to succeed, though.
     */
    assert(n == nBuf);
    fprintf(stderr,"%d bytes of encrypted data fed to state machine\n",n);
    }

int SSLStateMachine_read_extract(SSLStateMachine *pMachine,
				 unsigned char *aucBuf,int nBuf)
    {
    int n;

    if(!SSL_is_init_finished(pMachine->pSSL))
	{
	fprintf(stderr,"Doing SSL_accept\n");
	n=SSL_accept(pMachine->pSSL);
	if(n == 0)
	    fprintf(stderr,"SSL_accept returned zero\n");
	if(n < 0)
	    {
	    int err;

	    if((err=SSL_get_error(pMachine->pSSL,n)) == SSL_ERROR_WANT_READ)
		{
		fprintf(stderr,"SSL_accept wants more data\n");
		return 0;
		}

	    SSLStateMachine_print_error(pMachine,"SSL_accept error");
	    exit(7);
	    }
	return 0;
	}

    n=SSL_read(pMachine->pSSL,aucBuf,nBuf);
    if(n < 0)
	{
	int err=SSL_get_error(pMachine->pSSL,n);

	if(err == SSL_ERROR_WANT_READ)
	    {
	    fprintf(stderr,"SSL_read wants more data\n");
	    return 0;
	    }

	SSLStateMachine_print_error(pMachine,"SSL_read error");
	exit(8);
	}

    fprintf(stderr,"%d bytes of decrypted data read from state machine\n",n);
    return n;
    }

int SSLStateMachine_write_can_extract(SSLStateMachine *pMachine)
    {
    int n=BIO_pending(pMachine->pbioWrite);
    if(n)
	fprintf(stderr,"There is encrypted data available to write\n");
    else
	fprintf(stderr,"There is no encrypted data available to write\n");

    return n;
    }

int SSLStateMachine_write_extract(SSLStateMachine *pMachine,
				  unsigned char *aucBuf,int nBuf)
    {
    int n;

    n=BIO_read(pMachine->pbioWrite,aucBuf,nBuf);
    fprintf(stderr,"%d bytes of encrypted data read from state machine\n",n);
    return n;
    }

void SSLStateMachine_write_inject(SSLStateMachine *pMachine,
				  const unsigned char *aucBuf,int nBuf)
    {
    int n=SSL_write(pMachine->pSSL,aucBuf,nBuf);
    /* If it turns out this assert fails, then buffer the data here
     * and just feed it in in churn instead. Seems to me that it
     * should be guaranteed to succeed, though.
     */
    assert(n == nBuf);
    fprintf(stderr,"%d bytes of unencrypted data fed to state machine\n",n);
    }

int OpenSocket(int nPort)
    {
    int nSocket;
    struct sockaddr_in saServer;
    struct sockaddr_in saClient;
    int one=1;
    int nSize;
    int nFD;
    int nLen;

    nSocket=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
    if(nSocket < 0)
	{
	perror("socket");
	exit(1);
	}

    if(setsockopt(nSocket,SOL_SOCKET,SO_REUSEADDR,(char *)&one,sizeof one) < 0)
	{
	perror("setsockopt");
        exit(2);
	}

    memset(&saServer,0,sizeof saServer);
    saServer.sin_family=AF_INET;
    saServer.sin_port=htons(nPort);
    nSize=sizeof saServer;
    if(bind(nSocket,(struct sockaddr *)&saServer,nSize) < 0)
	{
	perror("bind");
	exit(3);
	}

    if(listen(nSocket,512) < 0)
	{
	perror("listen");
	exit(4);
	}

    nLen=sizeof saClient;
    nFD=accept(nSocket,(struct sockaddr *)&saClient,&nLen);
    if(nFD < 0)
	{
	perror("accept");
	exit(5);
	}

    fprintf(stderr,"Incoming accepted on port %d\n",nPort);

    return nFD;
    }

int main(int argc,char **argv)
    {
    SSLStateMachine *pMachine;
    int nPort;
    int nFD;
    const char *szCertificateFile;
    const char *szKeyFile;
    char rbuf[1];
    int nrbuf=0;

    if(argc != 4)
	{
	fprintf(stderr,"%s <port> <certificate file> <key file>\n",argv[0]);
	exit(6);
	}

    nPort=atoi(argv[1]);
    szCertificateFile=argv[2];
    szKeyFile=argv[3];

    OpenSSL_add_ssl_algorithms();
    SSL_load_error_strings();

    nFD=OpenSocket(nPort);

    pMachine=SSLStateMachine_new(szCertificateFile,szKeyFile);

    for( ; ; )
	{
	fd_set rfds,wfds;
	unsigned char buf[1024];
	int n;

	FD_ZERO(&rfds);
	FD_ZERO(&wfds);

	/* Select socket for input */
	FD_SET(nFD,&rfds);

	/* check whether there's decrypted data */
	if(!nrbuf)
	    nrbuf=SSLStateMachine_read_extract(pMachine,rbuf,1);

	/* if there's decrypted data, check whether we can write it */
	if(nrbuf)
	    FD_SET(1,&wfds);

	/* Select socket for output */
	if(SSLStateMachine_write_can_extract(pMachine))
	    FD_SET(nFD,&wfds);

	/* Select stdin for input */
	FD_SET(0,&rfds);

	/* Wait for something to do something */
	n=select(nFD+1,&rfds,&wfds,NULL,NULL);
	assert(n > 0);

	/* Socket is ready for input */
	if(FD_ISSET(nFD,&rfds))
	    {
	    n=read(nFD,buf,sizeof buf);
	    if(n == 0)
		{
		fprintf(stderr,"Got EOF on socket\n");
		exit(0);
		}
	    assert(n > 0);

	    SSLStateMachine_read_inject(pMachine,buf,n);
	    }

	/* stdout is ready for output (and hence we have some to send it) */
	if(FD_ISSET(1,&wfds))
	    {
	    assert(nrbuf == 1);
	    buf[0]=rbuf[0];
	    nrbuf=0;

	    n=SSLStateMachine_read_extract(pMachine,buf+1,sizeof buf-1);
	    if(n < 0)
		{
		SSLStateMachine_print_error(pMachine,"read extract failed");
		break;
		}
	    assert(n >= 0);
	    ++n;
	    if(n > 0) /* FIXME: has to be true now */
		{
		int w;
		
		w=write(1,buf,n);
		/* FIXME: we should push back any unwritten data */
		assert(w == n);
		}
	    }

	/* Socket is ready for output (and therefore we have output to send) */
	if(FD_ISSET(nFD,&wfds))
	    {
	    int w;

	    n=SSLStateMachine_write_extract(pMachine,buf,sizeof buf);
	    assert(n > 0);

	    w=write(nFD,buf,n);
	    /* FIXME: we should push back any unwritten data */
	    assert(w == n);
	    }

	/* Stdin is ready for input */
	if(FD_ISSET(0,&rfds))
	    {
	    n=read(0,buf,sizeof buf);
	    if(n == 0)
		{
		fprintf(stderr,"Got EOF on stdin\n");
		exit(0);
		}
	    assert(n > 0);

	    SSLStateMachine_write_inject(pMachine,buf,n);
	    }
	}
    /* not reached */
    return 0;
    }
Commit	Line	Data
7049ef5f BL	1	/* ====================================================================
	2	* Copyright (c) 2000 The OpenSSL Project. All rights reserved.
	3	*
	4	* Redistribution and use in source and binary forms, with or without
	5	* modification, are permitted provided that the following conditions
	6	* are met:
	7	*
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	*
	11	* 2. Redistributions in binary form must reproduce the above copyright
	12	* notice, this list of conditions and the following disclaimer in
	13	* the documentation and/or other materials provided with the
	14	* distribution.
	15	*
	16	* 3. All advertising materials mentioning features or use of this
	17	* software must display the following acknowledgment:
	18	* "This product includes software developed by the OpenSSL Project
	19	* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
	20	*
	21	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
	22	* endorse or promote products derived from this software without
	23	* prior written permission. For written permission, please contact
	24	* openssl-core@openssl.org.
	25	*
	26	* 5. Products derived from this software may not be called "OpenSSL"
	27	* nor may "OpenSSL" appear in their names without prior written
	28	* permission of the OpenSSL Project.
	29	*
	30	* 6. Redistributions of any form whatsoever must retain the following
	31	* acknowledgment:
	32	* "This product includes software developed by the OpenSSL Project
	33	* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
	34	*
	35	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
	36	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	37	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	38	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
	39	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	40	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	41	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	42	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	43	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	44	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	45	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	46	* OF THE POSSIBILITY OF SUCH DAMAGE.
	47	* ====================================================================
	48	*
	49	* This product includes cryptographic software written by Eric Young
	50	* (eay@cryptsoft.com). This product includes software written by Tim
	51	* Hudson (tjh@cryptsoft.com).
	52	*
	53	*/
	54
	55	/*
	56	* Nuron, a leader in hardware encryption technology, generously
	57	* sponsored the development of this demo by Ben Laurie.
	58	*
	59	* See http://www.nuron.com/.
	60	*/
	61
	62	/*
	63	* the aim of this demo is to provide a fully working state-machine
	64	* style SSL implementation, i.e. one where the main loop acquires
65	* some data, then converts it from or to SSL by feeding it into the
66	* SSL state machine. It then does any I/O required by the state machine
67	* and loops.
68	*
69	* In order to keep things as simple as possible, this implementation
70	* listens on a TCP socket, which it expects to get an SSL connection
71	* on (for example, from s_client) and from then on writes decrypted
72	* data to stdout and encrypts anything arriving on stdin. Verbose
73	* commentary is written to stderr.
74	*
75	* This implementation acts as a server, but it can also be done for a client. */
76
77	#include <openssl/ssl.h>
78	#include <assert.h>
79	#include <unistd.h>
80	#include <string.h>
81	#include <openssl/err.h>
82	#include <sys/types.h>
83	#include <sys/socket.h>
84	#include <netinet/in.h>
85
29eb7d9c BL	86	/* die_unless is intended to work like assert, except that it happens
	87	always, even if NDEBUG is defined. Use assert as a stopgap. */
	88
	89	#define die_unless(x) assert(x)
	90
7049ef5f BL	91	typedef struct
	92	{
	93	SSL_CTX *pCtx;
	94	BIO *pbioRead;
	95	BIO *pbioWrite;
	96	SSL *pSSL;
	97	} SSLStateMachine;
	98
	99	void SSLStateMachine_print_error(SSLStateMachine pMachine,const char szErr)
	100	{
	101	unsigned long l;
	102
	103	fprintf(stderr,"%s\n",szErr);
	104	while((l=ERR_get_error()))
	105	{
	106	char buf[1024];
	107
	108	ERR_error_string_n(l,buf,sizeof buf);
	109	fprintf(stderr,"Error %lx: %s\n",l,buf);
	110	}
	111	}
	112
	113	SSLStateMachine SSLStateMachine_new(const char szCertificateFile,
	114	const char *szKeyFile)
	115	{
	116	SSLStateMachine pMachine=malloc(sizeof pMachine);
	117	int n;
	118
29eb7d9c	119	die_unless(pMachine);
7049ef5f BL	120
7049ef5f BL	121	pMachine->pCtx=SSL_CTX_new(SSLv23_server_method());
29eb7d9c	122	die_unless(pMachine->pCtx);
7049ef5f BL	123
	124	n=SSL_CTX_use_certificate_file(pMachine->pCtx,szCertificateFile,
	125	SSL_FILETYPE_PEM);
29eb7d9c	126	die_unless(n > 0);
7049ef5f BL	127
7049ef5f BL	128	n=SSL_CTX_use_PrivateKey_file(pMachine->pCtx,szKeyFile,SSL_FILETYPE_PEM);
29eb7d9c	129	die_unless(n > 0);
7049ef5f BL	130
7049ef5f BL	131	pMachine->pSSL=SSL_new(pMachine->pCtx);
29eb7d9c	132	die_unless(pMachine->pSSL);
7049ef5f BL	133
7049ef5f BL	134	pMachine->pbioRead=BIO_new(BIO_s_mem());
7049ef5f BL	135
	136	pMachine->pbioWrite=BIO_new(BIO_s_mem());
	137
	138	SSL_set_bio(pMachine->pSSL,pMachine->pbioRead,pMachine->pbioWrite);
	139
	140	SSL_set_accept_state(pMachine->pSSL);
	141
	142	return pMachine;
	143	}
	144
	145	void SSLStateMachine_read_inject(SSLStateMachine *pMachine,
	146	const unsigned char *aucBuf,int nBuf)
	147	{
	148	int n=BIO_write(pMachine->pbioRead,aucBuf,nBuf);
	149	/* If it turns out this assert fails, then buffer the data here
	150	* and just feed it in in churn instead. Seems to me that it
	151	* should be guaranteed to succeed, though.
	152	*/
	153	assert(n == nBuf);
	154	fprintf(stderr,"%d bytes of encrypted data fed to state machine\n",n);
	155	}
	156
	157	int SSLStateMachine_read_extract(SSLStateMachine *pMachine,
	158	unsigned char *aucBuf,int nBuf)
	159	{
	160	int n;
	161
	162	if(!SSL_is_init_finished(pMachine->pSSL))
	163	{
	164	fprintf(stderr,"Doing SSL_accept\n");
	165	n=SSL_accept(pMachine->pSSL);
7049ef5f BL	166	if(n == 0)
7049ef5f BL	167	fprintf(stderr,"SSL_accept returned zero\n");
f3f53c8c BL	168	if(n < 0)
	169	{
	170	int err;
	171
	172	if((err=SSL_get_error(pMachine->pSSL,n)) == SSL_ERROR_WANT_READ)
	173	{
	174	fprintf(stderr,"SSL_accept wants more data\n");
	175	return 0;
	176	}
	177
	178	SSLStateMachine_print_error(pMachine,"SSL_accept error");
	179	exit(7);
	180	}
7049ef5f BL	181	return 0;
	182	}
	183
	184	n=SSL_read(pMachine->pSSL,aucBuf,nBuf);
f3f53c8c BL	185	if(n < 0)
	186	{
	187	int err=SSL_get_error(pMachine->pSSL,n);
	188
	189	if(err == SSL_ERROR_WANT_READ)
	190	{
	191	fprintf(stderr,"SSL_read wants more data\n");
	192	return 0;
	193	}
171cc53a BL	194
	195	SSLStateMachine_print_error(pMachine,"SSL_read error");
	196	exit(8);
f3f53c8c BL	197	}
f3f53c8c BL	198
7049ef5f BL	199	fprintf(stderr,"%d bytes of decrypted data read from state machine\n",n);
	200	return n;
	201	}
	202
	203	int SSLStateMachine_write_can_extract(SSLStateMachine *pMachine)
	204	{
	205	int n=BIO_pending(pMachine->pbioWrite);
	206	if(n)
	207	fprintf(stderr,"There is encrypted data available to write\n");
	208	else
	209	fprintf(stderr,"There is no encrypted data available to write\n");
	210
	211	return n;
	212	}
	213
	214	int SSLStateMachine_write_extract(SSLStateMachine *pMachine,
	215	unsigned char *aucBuf,int nBuf)
	216	{
	217	int n;
	218
	219	n=BIO_read(pMachine->pbioWrite,aucBuf,nBuf);
	220	fprintf(stderr,"%d bytes of encrypted data read from state machine\n",n);
	221	return n;
	222	}
	223
	224	void SSLStateMachine_write_inject(SSLStateMachine *pMachine,
	225	const unsigned char *aucBuf,int nBuf)
	226	{
	227	int n=SSL_write(pMachine->pSSL,aucBuf,nBuf);
	228	/* If it turns out this assert fails, then buffer the data here
	229	* and just feed it in in churn instead. Seems to me that it
	230	* should be guaranteed to succeed, though.
	231	*/
	232	assert(n == nBuf);
	233	fprintf(stderr,"%d bytes of unencrypted data fed to state machine\n",n);
	234	}
	235
	236	int OpenSocket(int nPort)
	237	{
	238	int nSocket;
	239	struct sockaddr_in saServer;
	240	struct sockaddr_in saClient;
	241	int one=1;
	242	int nSize;
	243	int nFD;
	244	int nLen;
	245
	246	nSocket=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
	247	if(nSocket < 0)
	248	{
	249	perror("socket");
	250	exit(1);
	251	}
	252
	253	if(setsockopt(nSocket,SOL_SOCKET,SO_REUSEADDR,(char *)&one,sizeof one) < 0)
	254	{
	255	perror("setsockopt");
	256	exit(2);
	257	}
	258
	259	memset(&saServer,0,sizeof saServer);
	260	saServer.sin_family=AF_INET;
	261	saServer.sin_port=htons(nPort);
	262	nSize=sizeof saServer;
263	if(bind(nSocket,(struct sockaddr *)&saServer,nSize) < 0)
264	{
265	perror("bind");
266	exit(3);
267	}
268
269	if(listen(nSocket,512) < 0)
270	{
271	perror("listen");
272	exit(4);
273	}
274
275	nLen=sizeof saClient;
276	nFD=accept(nSocket,(struct sockaddr *)&saClient,&nLen);
277	if(nFD < 0)
278	{
279	perror("accept");
280	exit(5);
281	}
282
283	fprintf(stderr,"Incoming accepted on port %d\n",nPort);
284
285	return nFD;
286	}
287
54705b39	288	int main(int argc,char **argv)
7049ef5f BL	289	{
	290	SSLStateMachine *pMachine;
	291	int nPort;
	292	int nFD;
	293	const char *szCertificateFile;
	294	const char *szKeyFile;
171cc53a BL	295	char rbuf[1];
171cc53a BL	296	int nrbuf=0;
7049ef5f BL	297
	298	if(argc != 4)
	299	{
	300	fprintf(stderr,"%s <port> <certificate file> <key file>\n",argv[0]);
	301	exit(6);
	302	}
	303
	304	nPort=atoi(argv[1]);
	305	szCertificateFile=argv[2];
	306	szKeyFile=argv[3];
	307
7049ef5f BL	308	OpenSSL_add_ssl_algorithms();
7049ef5f BL	309	SSL_load_error_strings();
7049ef5f BL	310
	311	nFD=OpenSocket(nPort);
	312
	313	pMachine=SSLStateMachine_new(szCertificateFile,szKeyFile);
	314
	315	for( ; ; )
	316	{
	317	fd_set rfds,wfds;
	318	unsigned char buf[1024];
	319	int n;
	320
	321	FD_ZERO(&rfds);
	322	FD_ZERO(&wfds);
	323
	324	/* Select socket for input */
	325	FD_SET(nFD,&rfds);
	326
171cc53a BL	327	/* check whether there's decrypted data */
	328	if(!nrbuf)
	329	nrbuf=SSLStateMachine_read_extract(pMachine,rbuf,1);
	330
	331	/* if there's decrypted data, check whether we can write it */
	332	if(nrbuf)
	333	FD_SET(1,&wfds);
	334
7049ef5f BL	335	/* Select socket for output */
	336	if(SSLStateMachine_write_can_extract(pMachine))
	337	FD_SET(nFD,&wfds);
	338
	339	/* Select stdin for input */
	340	FD_SET(0,&rfds);
	341
	342	/* Wait for something to do something */
	343	n=select(nFD+1,&rfds,&wfds,NULL,NULL);
	344	assert(n > 0);
	345
	346	/* Socket is ready for input */
	347	if(FD_ISSET(nFD,&rfds))
	348	{
	349	n=read(nFD,buf,sizeof buf);
	350	if(n == 0)
	351	{
	352	fprintf(stderr,"Got EOF on socket\n");
	353	exit(0);
	354	}
	355	assert(n > 0);
	356
	357	SSLStateMachine_read_inject(pMachine,buf,n);
	358	}
	359
171cc53a BL	360	/* stdout is ready for output (and hence we have some to send it) */
171cc53a BL	361	if(FD_ISSET(1,&wfds))
7049ef5f	362	{
171cc53a BL	363	assert(nrbuf == 1);
	364	buf[0]=rbuf[0];
	365	nrbuf=0;
7049ef5f	366
171cc53a BL	367	n=SSLStateMachine_read_extract(pMachine,buf+1,sizeof buf-1);
	368	if(n < 0)
	369	{
	370	SSLStateMachine_print_error(pMachine,"read extract failed");
	371	break;
	372	}
	373	assert(n >= 0);
	374	++n;
	375	if(n > 0) /* FIXME: has to be true now */
	376	{
	377	int w;
	378
	379	w=write(1,buf,n);
	380	/* FIXME: we should push back any unwritten data */
	381	assert(w == n);
	382	}
7049ef5f BL	383	}
	384
	385	/* Socket is ready for output (and therefore we have output to send) */
	386	if(FD_ISSET(nFD,&wfds))
	387	{
	388	int w;
	389
	390	n=SSLStateMachine_write_extract(pMachine,buf,sizeof buf);
	391	assert(n > 0);
	392
	393	w=write(nFD,buf,n);
	394	/* FIXME: we should push back any unwritten data */
	395	assert(w == n);
	396	}
	397
	398	/* Stdin is ready for input */
	399	if(FD_ISSET(0,&rfds))
	400	{
	401	n=read(0,buf,sizeof buf);
	402	if(n == 0)
	403	{
	404	fprintf(stderr,"Got EOF on stdin\n");
	405	exit(0);
	406	}
	407	assert(n > 0);
	408
	409	SSLStateMachine_write_inject(pMachine,buf,n);
	410	}
	411	}
54705b39 BM	412	/* not reached */
54705b39 BM	413	return 0;
7049ef5f	414	}