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s_client/s_server: support unix domain sockets

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The "-unix <path>" argument allows s_server and s_client to use a unix
domain socket in the filesystem instead of IPv4 ("-connect", "-port",
"-accept", etc). If s_server exits gracefully, such as when "-naccept"
is used and the requested number of SSL/TLS connections have occurred,
then the domain socket file is removed. On ctrl-C, it is likely that
the stale socket file will be left over, such that s_server would
normally fail to restart with the same arguments. For this reason,
s_server also supports an "-unlink" option, which will clean up any
stale socket file before starting.

If you have any reason to want encrypted IPC within an O/S instance,
this concept might come in handy. Otherwise it just demonstrates that
there is nothing about SSL/TLS that limits it to TCP/IP in any way.

(There might also be benchmarking and profiling use in this path, as
unix domain sockets are much lower overhead than connecting over local
IP addresses).

Signed-off-by: Geoff Thorpe <geoff@openssl.org>
This commit is contained in:
Geoff Thorpe 2014-04-26 01:22:54 -04:00
parent b6e69d284b
commit a935132099
5 changed files with 214 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
apps/s_apps.h
View File

@ -148,7 +148,14 @@ typedef fd_mask fd_set;
#define PORT_STR "4433"
#define PROTOCOL "tcp"
int do_server(int port, int type, int *ret, int (*cb) (char *hostname, int s, int stype, unsigned char *context), unsigned char *context, int naccept);
int do_server(int port, int type, int *ret,
int (*cb)(char *hostname, int s, int stype, unsigned char *context),
unsigned char *context, int naccept);
#ifndef NO_SYS_UN_H
int do_server_unix(const char *path, int *ret,
int (*cb)(char *hostname, int s, int stype, unsigned char *context),
unsigned char *context, int naccept);
#endif
#ifdef HEADER_X509_H
int MS_CALLBACK verify_callback(int ok, X509_STORE_CTX *ctx);
#endif
@ -162,6 +169,9 @@ int ssl_print_curves(BIO *out, SSL *s, int noshared);
#endif
int ssl_print_tmp_key(BIO *out, SSL *s);
int init_client(int *sock, const char *server, int port, int type);
#ifndef NO_SYS_UN_H
int init_client_unix(int *sock, const char *server);
#endif
int should_retry(int i);
int extract_port(const char *str, short *port_ptr);
int extract_host_port(char *str,char **host_ptr,unsigned char *ip,short *p);

17
apps/s_client.c
View File

@ -323,7 +323,8 @@ static void sc_usage(void)
BIO_printf(bio_err,"\n");
BIO_printf(bio_err," -host host - use -connect instead\n");
BIO_printf(bio_err," -port port - use -connect instead\n");
BIO_printf(bio_err," -connect host:port - who to connect to (default is %s:%s)\n",SSL_HOST_NAME,PORT_STR);
BIO_printf(bio_err," -connect host:port - connect over TCP/IP (default is %s:%s)\n",SSL_HOST_NAME,PORT_STR);
BIO_printf(bio_err," -unix path - connect over unix domain sockets\n");
BIO_printf(bio_err," -verify arg - turn on peer certificate verification\n");
BIO_printf(bio_err," -cert arg - certificate file to use, PEM format assumed\n");
BIO_printf(bio_err," -certform arg - certificate format (PEM or DER) PEM default\n");
@ -627,6 +628,7 @@ int MAIN(int argc, char **argv)
short port=PORT;
int full_log=1;
char *host=SSL_HOST_NAME;
const char *unix_path = NULL;
char *xmpphost = NULL;
char *cert_file=NULL,*key_file=NULL,*chain_file=NULL;
int cert_format = FORMAT_PEM, key_format = FORMAT_PEM;
@ -760,6 +762,11 @@ static char *jpake_secret = NULL;
if (!extract_host_port(*(++argv),&host,NULL,&port))
goto bad;
}
else if (strcmp(*argv,"-unix") == 0)
{
if (--argc < 1) goto bad;
unix_path = *(++argv);
}
else if (strcmp(*argv,"-xmpphost") == 0)
{
if (--argc < 1) goto bad;
@ -1155,6 +1162,11 @@ bad:
goto end;
}
if (unix_path && (socket_type != SOCK_STREAM))
{
BIO_printf(bio_err, "Can't use unix sockets and datagrams together\n");
goto end;
}
#if !defined(OPENSSL_NO_JPAKE) && !defined(OPENSSL_NO_PSK)
if (jpake_secret)
{
@ -1499,7 +1511,8 @@ bad:
re_start:
if (init_client(&s,host,port,socket_type) == 0)
if ((!unix_path && (init_client(&s,host,port,socket_type) == 0)) ||
(unix_path && (init_client_unix(&s,unix_path) == 0)))
{
BIO_printf(bio_err,"connect:errno=%d\n",get_last_socket_error());
SHUTDOWN(s);

45
apps/s_server.c
View File

@ -479,7 +479,9 @@ 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," -accept port - TCP/IP port to accept on (default is %d)\n",PORT);
BIO_printf(bio_err," -unix path - unix domain socket to accept on\n");
BIO_printf(bio_err," -unlink - for -unix, unlink existing socket first\n");
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");
@ -1008,6 +1010,9 @@ int MAIN(int argc, char *argv[])
X509_VERIFY_PARAM *vpm = NULL;
int badarg = 0;
short port=PORT;
const char *unix_path=NULL;
int unlink_unix_path=0;
int (*server_cb)(char *hostname, int s, int stype, unsigned char *context);
char *CApath=NULL,*CAfile=NULL;
char *chCApath=NULL,*chCAfile=NULL;
char *vfyCApath=NULL,*vfyCAfile=NULL;
@ -1100,6 +1105,25 @@ int MAIN(int argc, char *argv[])
if (!extract_port(*(++argv),&port))
goto bad;
}
else if (strcmp(*argv,"-unix") == 0)
{
#ifdef NO_SYS_UN_H
BIO_printf(bio_err, "unix domain sockets unsupported\n");
goto bad;
#else
if (--argc < 1) goto bad;
unix_path = *(++argv);
#endif
}
else if (strcmp(*argv,"-unlink") == 0)
{
#ifdef NO_SYS_UN_H
BIO_printf(bio_err, "unix domain sockets unsupported\n");
goto bad;
#else
unlink_unix_path = 1;
#endif
}
else if (strcmp(*argv,"-naccept") == 0)
{
if (--argc < 1) goto bad;
@ -1544,6 +1568,11 @@ bad:
goto end;
}
if (unix_path && (socket_type != SOCK_STREAM))
{
BIO_printf(bio_err, "Can't use unix sockets and datagrams together\n");
goto end;
}
#if !defined(OPENSSL_NO_JPAKE) && !defined(OPENSSL_NO_PSK)
if (jpake_secret)
{
@ -2106,11 +2135,19 @@ bad:
BIO_printf(bio_s_out,"ACCEPT\n");
(void)BIO_flush(bio_s_out);
if (rev)
do_server(port,socket_type,&accept_socket,rev_body, context, naccept);
server_cb = rev_body;
else if (www)
do_server(port,socket_type,&accept_socket,www_body, context, naccept);
server_cb = www_body;
else
do_server(port,socket_type,&accept_socket,sv_body, context, naccept);
server_cb = sv_body;
if (unix_path)
{
if (unlink_unix_path)
unlink(unix_path);
do_server_unix(unix_path,&accept_socket,server_cb, context, naccept);
}
else
do_server(port,socket_type,&accept_socket,server_cb, context, naccept);
print_stats(bio_s_out,ctx);
ret=0;
end:

138
apps/s_socket.c
View File

@ -102,6 +102,10 @@ static int init_server(int *sock, int port, int type);
static int init_server_long(int *sock, int port,char *ip, int type);
static int do_accept(int acc_sock, int *sock, char **host);
static int host_ip(const char *str, unsigned char ip[4]);
#ifndef NO_SYS_UN_H
static int init_server_unix(int *sock, const char *path);
static int do_accept_unix(int acc_sock, int *sock);
#endif
#ifdef OPENSSL_SYS_WIN16
#define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
@ -280,7 +284,32 @@ static int init_client_ip(int *sock, const unsigned char ip[4], int port,
return(1);
}
int do_server(int port, int type, int *ret, int (*cb)(char *hostname, int s, int stype, unsigned char *context), unsigned char *context, int naccept)
#ifndef NO_SYS_UN_H
int init_client_unix(int *sock, const char *server)
{
struct sockaddr_un them;
int s;
if (strlen(server) > (UNIX_PATH_MAX + 1)) return(0);
if (!ssl_sock_init()) return(0);
s=socket(AF_UNIX, SOCK_STREAM, 0);
if (s == INVALID_SOCKET) { perror("socket"); return(0); }
memset((char *)&them,0,sizeof(them));
them.sun_family=AF_UNIX;
strcpy(them.sun_path, server);
if (connect(s, (struct sockaddr *)&them, sizeof(them)) == -1)
{ closesocket(s); perror("connect"); return(0); }
*sock=s;
return(1);
}
#endif
int do_server(int port, int type, int *ret,
int (*cb)(char *hostname, int s, int stype, unsigned char *context),
unsigned char *context, int naccept)
{
int sock;
char *name = NULL;
@ -324,6 +353,43 @@ int do_server(int port, int type, int *ret, int (*cb)(char *hostname, int s, int
}
}
#ifndef NO_SYS_UN_H
int do_server_unix(const char *path, int *ret,
int (*cb)(char *hostname, int s, int stype, unsigned char *context),
unsigned char *context, int naccept)
{
int sock;
int accept_socket = 0;
int i;
if (!init_server_unix(&accept_socket, path)) return(0);
if (ret != NULL)
*ret=accept_socket;
for (;;)
{
if (do_accept_unix(accept_socket, &sock) == 0)
{
SHUTDOWN(accept_socket);
i = 0;
goto out;
}
i=(*cb)(NULL, sock, 0, context);
SHUTDOWN2(sock);
if (naccept != -1)
naccept--;
if (i < 0 || naccept == 0)
{
SHUTDOWN2(accept_socket);
goto out;
}
}
out:
unlink(path);
return(i);
}
#endif
static int init_server_long(int *sock, int port, char *ip, int type)
{
int ret=0;
@ -382,6 +448,50 @@ static int init_server(int *sock, int port, int type)
return(init_server_long(sock, port, NULL, type));
}
#ifndef NO_SYS_UN_H
static int init_server_unix(int *sock, const char *path)
{
int ret = 0;
struct sockaddr_un server;
int s = -1;
if (strlen(path) > (UNIX_PATH_MAX + 1)) return(0);
if (!ssl_sock_init()) return(0);
s=socket(AF_UNIX, SOCK_STREAM, 0);
if (s == INVALID_SOCKET) goto err;
memset((char *)&server,0,sizeof(server));
server.sun_family=AF_UNIX;
strcpy(server.sun_path, path);
if (bind(s, (struct sockaddr *)&server, sizeof(server)) == -1)
{
#ifndef OPENSSL_SYS_WINDOWS
perror("bind");
#endif
goto err;
}
/* Make it 128 for linux */
if (listen(s,128) == -1)
{
#ifndef OPENSSL_SYS_WINDOWS
perror("listen");
#endif
unlink(path);
goto err;
}
*sock=s;
ret=1;
err:
if ((ret == 0) && (s != -1))
{
SHUTDOWN(s);
}
return(ret);
}
#endif
static int do_accept(int acc_sock, int *sock, char **host)
{
int ret;
@ -476,6 +586,32 @@ end:
return(1);
}
#ifndef NO_SYS_UN_H
static int do_accept_unix(int acc_sock, int *sock)
{
int ret;
if (!ssl_sock_init()) return(0);
redoit:
ret=accept(acc_sock, NULL, NULL);
if (ret == INVALID_SOCKET)
{
if (errno == EINTR)
{
/*check_timeout(); */
goto redoit;
}
fprintf(stderr,"errno=%d ",errno);
perror("accept");
return(0);
}
*sock=ret;
return(1);
}
#endif
int extract_host_port(char *str, char **host_ptr, unsigned char *ip,
short *port_ptr)
{

10
e_os.h
View File

@ -579,6 +579,16 @@ static unsigned int _strlen31(const char *str)
# include <inet.h>
# else
# include <sys/socket.h>
# ifndef NO_SYS_UN_H
# ifdef OPENSSL_SYS_VXWORKS
# include <streams/un.h>
# else
# include <sys/un.h>
# endif
# ifndef UNIX_PATH_MAX
# define UNIX_PATH_MAX sizeof(((struct sockaddr_un *)NULL)->sun_path)
# endif
# endif
# ifdef FILIO_H
# include <sys/filio.h> /* Added for FIONBIO under unixware */
# endif