Checked in the following released items:

xkeyboard-config-1.4.tar.gz
ttf-bitstream-vera-1.10.tar.gz
font-alias-1.0.1.tar.gz
font-sun-misc-1.0.0.tar.gz
font-sun-misc-1.0.0.tar.gz
font-sony-misc-1.0.0.tar.gz
font-schumacher-misc-1.0.0.tar.gz
font-mutt-misc-1.0.0.tar.gz
font-misc-misc-1.0.0.tar.gz
font-misc-meltho-1.0.0.tar.gz
font-micro-misc-1.0.0.tar.gz
font-jis-misc-1.0.0.tar.gz
font-isas-misc-1.0.0.tar.gz
font-dec-misc-1.0.0.tar.gz
font-daewoo-misc-1.0.0.tar.gz
font-cursor-misc-1.0.0.tar.gz
font-arabic-misc-1.0.0.tar.gz
font-winitzki-cyrillic-1.0.0.tar.gz
font-misc-cyrillic-1.0.0.tar.gz
font-cronyx-cyrillic-1.0.0.tar.gz
font-screen-cyrillic-1.0.1.tar.gz
font-xfree86-type1-1.0.1.tar.gz
font-adobe-utopia-type1-1.0.1.tar.gz
font-ibm-type1-1.0.0.tar.gz
font-bitstream-type1-1.0.0.tar.gz
font-bitstream-speedo-1.0.0.tar.gz
font-bh-ttf-1.0.0.tar.gz
font-bh-type1-1.0.0.tar.gz
font-bitstream-100dpi-1.0.0.tar.gz
font-bh-lucidatypewriter-100dpi-1.0.0.tar.gz
font-bh-100dpi-1.0.0.tar.gz
font-adobe-utopia-100dpi-1.0.1.tar.gz
font-adobe-100dpi-1.0.0.tar.gz
font-util-1.0.1.tar.gz
font-bitstream-75dpi-1.0.0.tar.gz
font-bh-lucidatypewriter-75dpi-1.0.0.tar.gz
font-adobe-utopia-75dpi-1.0.1.tar.gz
font-bh-75dpi-1.0.0.tar.gz
bdftopcf-1.0.1.tar.gz
font-adobe-75dpi-1.0.0.tar.gz
mkfontscale-1.0.6.tar.gz
openssl-0.9.8k.tar.gz
bigreqsproto-1.0.2.tar.gz
xtrans-1.2.2.tar.gz
resourceproto-1.0.2.tar.gz
inputproto-1.4.4.tar.gz
compositeproto-0.4.tar.gz
damageproto-1.1.0.tar.gz
zlib-1.2.3.tar.gz
xkbcomp-1.0.5.tar.gz
freetype-2.3.9.tar.gz
pthreads-w32-2-8-0-release.tar.gz
pixman-0.12.0.tar.gz
kbproto-1.0.3.tar.gz
evieext-1.0.2.tar.gz
fixesproto-4.0.tar.gz
recordproto-1.13.2.tar.gz
randrproto-1.2.2.tar.gz
scrnsaverproto-1.1.0.tar.gz
renderproto-0.9.3.tar.gz
xcmiscproto-1.1.2.tar.gz
fontsproto-2.0.2.tar.gz
xextproto-7.0.3.tar.gz
xproto-7.0.14.tar.gz
libXdmcp-1.0.2.tar.gz
libxkbfile-1.0.5.tar.gz
libfontenc-1.0.4.tar.gz
libXfont-1.3.4.tar.gz
libX11-1.1.5.tar.gz
libXau-1.0.4.tar.gz
libxcb-1.1.tar.gz
xorg-server-1.5.3.tar.gz

1 files changed, 1107 insertions, 0 deletions

diff --git a/openssl/demos/tunala/tunala.c b/openssl/demos/tunala/tunala.c
new file mode 100644
index 000000000..e918cba2c
--- /dev/null
+++ b/openssl/demos/tunala/tunala.c
@@ -0,0 +1,1107 @@
+#if defined(NO_BUFFER) || defined(NO_IP) || defined(NO_OPENSSL)
+#error "Badness, NO_BUFFER, NO_IP or NO_OPENSSL is defined, turn them *off*"
+#endif
+
+/* Include our bits'n'pieces */
+#include "tunala.h"
+
+
+/********************************************/
+/* Our local types that specify our "world" */
+/********************************************/
+
+/* These represent running "tunnels". Eg. if you wanted to do SSL in a
+ * "message-passing" scanario, the "int" file-descriptors might be replaced by
+ * thread or process IDs, and the "select" code might be replaced by message
+ * handling code. Whatever. */
+typedef struct _tunala_item_t {
+	/* The underlying SSL state machine. This is a data-only processing unit
+	 * and we communicate with it by talking to its four "buffers". */
+	state_machine_t sm;
+	/* The file-descriptors for the "dirty" (encrypted) side of the SSL
+	 * setup. In actuality, this is typically a socket and both values are
+	 * identical. */
+	int dirty_read, dirty_send;
+	/* The file-descriptors for the "clean" (unencrypted) side of the SSL
+	 * setup. These could be stdin/stdout, a socket (both values the same),
+	 * or whatever you like. */
+	int clean_read, clean_send;
+} tunala_item_t;
+
+/* This structure is used as the data for running the main loop. Namely, in a
+ * network format such as this, it is stuff for select() - but as pointed out,
+ * when moving the real-world to somewhere else, this might be replaced by
+ * something entirely different. It's basically the stuff that controls when
+ * it's time to do some "work". */
+typedef struct _select_sets_t {
+	int max; /* As required as the first argument to select() */
+	fd_set reads, sends, excepts; /* As passed to select() */
+} select_sets_t;
+typedef struct _tunala_selector_t {
+	select_sets_t last_selected; /* Results of the last select() */
+	select_sets_t next_select; /* What we'll next select on */
+} tunala_selector_t;
+
+/* This structure is *everything*. We do it to avoid the use of globals so that,
+ * for example, it would be easier to shift things around between async-IO,
+ * thread-based, or multi-fork()ed (or combinations thereof). */
+typedef struct _tunala_world_t {
+	/* The file-descriptor we "listen" on for new connections */
+	int listen_fd;
+	/* The array of tunnels */
+	tunala_item_t *tunnels;
+	/* the number of tunnels in use and allocated, respectively */
+	unsigned int tunnels_used, tunnels_size;
+	/* Our outside "loop" context stuff */
+	tunala_selector_t selector;
+	/* Our SSL_CTX, which is configured as the SSL client or server and has
+	 * the various cert-settings and callbacks configured. */
+	SSL_CTX *ssl_ctx;
+	/* Simple flag with complex logic :-) Indicates whether we're an SSL
+	 * server or an SSL client. */
+	int server_mode;
+} tunala_world_t;
+
+/*****************************/
+/* Internal static functions */
+/*****************************/
+
+static SSL_CTX *initialise_ssl_ctx(int server_mode, const char *engine_id,
+		const char *CAfile, const char *cert, const char *key,
+		const char *dcert, const char *dkey, const char *cipher_list,
+		const char *dh_file, const char *dh_special, int tmp_rsa,
+		int ctx_options, int out_state, int out_verify, int verify_mode,
+		unsigned int verify_depth);
+static void selector_init(tunala_selector_t *selector);
+static void selector_add_listener(tunala_selector_t *selector, int fd);
+static void selector_add_tunala(tunala_selector_t *selector, tunala_item_t *t);
+static int selector_select(tunala_selector_t *selector);
+/* This returns -1 for error, 0 for no new connections, or 1 for success, in
+ * which case *newfd is populated. */
+static int selector_get_listener(tunala_selector_t *selector, int fd, int *newfd);
+static int tunala_world_new_item(tunala_world_t *world, int fd,
+		const char *ip, unsigned short port, int flipped);
+static void tunala_world_del_item(tunala_world_t *world, unsigned int idx);
+static int tunala_item_io(tunala_selector_t *selector, tunala_item_t *item);
+
+/*********************************************/
+/* MAIN FUNCTION (and its utility functions) */
+/*********************************************/
+
+static const char *def_proxyhost = "127.0.0.1:443";
+static const char *def_listenhost = "127.0.0.1:8080";
+static int def_max_tunnels = 50;
+static const char *def_cacert = NULL;
+static const char *def_cert = NULL;
+static const char *def_key = NULL;
+static const char *def_dcert = NULL;
+static const char *def_dkey = NULL;
+static const char *def_engine_id = NULL;
+static int def_server_mode = 0;
+static int def_flipped = 0;
+static const char *def_cipher_list = NULL;
+static const char *def_dh_file = NULL;
+static const char *def_dh_special = NULL;
+static int def_tmp_rsa = 1;
+static int def_ctx_options = 0;
+static int def_verify_mode = 0;
+static unsigned int def_verify_depth = 10;
+static int def_out_state = 0;
+static unsigned int def_out_verify = 0;
+static int def_out_totals = 0;
+static int def_out_conns = 0;
+
+static const char *helpstring =
+"\n'Tunala' (A tunneler with a New Zealand accent)\n"
+"Usage: tunala [options], where options are from;\n"
+" -listen [host:]<port>  (default = 127.0.0.1:8080)\n"
+" -proxy <host>:<port>   (default = 127.0.0.1:443)\n"
+" -maxtunnels <num>      (default = 50)\n"
+" -cacert <path|NULL>    (default = NULL)\n"
+" -cert <path|NULL>      (default = NULL)\n"
+" -key <path|NULL>       (default = whatever '-cert' is)\n"
+" -dcert <path|NULL>     (usually for DSA, default = NULL)\n"
+" -dkey <path|NULL>      (usually for DSA, default = whatever '-dcert' is)\n"
+" -engine <id|NULL>      (default = NULL)\n"
+" -server <0|1>          (default = 0, ie. an SSL client)\n"
+" -flipped <0|1>         (makes SSL servers be network clients, and vice versa)\n"
+" -cipher <list>         (specifies cipher list to use)\n"
+" -dh_file <path>        (a PEM file containing DH parameters to use)\n"
+" -dh_special <NULL|generate|standard> (see below: def=NULL)\n"
+" -no_tmp_rsa            (don't generate temporary RSA keys)\n"
+" -no_ssl2               (disable SSLv2)\n"
+" -no_ssl3               (disable SSLv3)\n"
+" -no_tls1               (disable TLSv1)\n"
+" -v_peer                (verify the peer certificate)\n"
+" -v_strict              (do not continue if peer doesn't authenticate)\n"
+" -v_once                (no verification in renegotiates)\n"
+" -v_depth <num>         (limit certificate chain depth, default = 10)\n"
+" -out_conns             (prints client connections and disconnections)\n"
+" -out_state             (prints SSL handshake states)\n"
+" -out_verify <0|1|2|3>  (prints certificate verification states: def=1)\n"
+" -out_totals            (prints out byte-totals when a tunnel closes)\n"
+" -<h|help|?>            (displays this help screen)\n"
+"Notes:\n"
+"(1) It is recommended to specify a cert+key when operating as an SSL server.\n"
+"    If you only specify '-cert', the same file must contain a matching\n"
+"    private key.\n"
+"(2) Either dh_file or dh_special can be used to specify where DH parameters\n"
+"    will be obtained from (or '-dh_special NULL' for the default choice) but\n"
+"    you cannot specify both. For dh_special, 'generate' will create new DH\n"
+"    parameters on startup, and 'standard' will use embedded parameters\n"
+"    instead.\n"
+"(3) Normally an ssl client connects to an ssl server - so that an 'ssl client\n"
+"    tunala' listens for 'clean' client connections and proxies ssl, and an\n"
+"    'ssl server tunala' listens for ssl connections and proxies 'clean'. With\n"
+"    '-flipped 1', this behaviour is reversed so that an 'ssl server tunala'\n"
+"    listens for clean client connections and proxies ssl (but participating\n"
+"    as an ssl *server* in the SSL/TLS protocol), and an 'ssl client tunala'\n"
+"    listens for ssl connections (participating as an ssl *client* in the\n"
+"    SSL/TLS protocol) and proxies 'clean' to the end destination. This can\n"
+"    be useful for allowing network access to 'servers' where only the server\n"
+"    needs to authenticate the client (ie. the other way is not required).\n"
+"    Even with client and server authentication, this 'technique' mitigates\n"
+"    some DoS (denial-of-service) potential as it will be the network client\n"
+"    having to perform the first private key operation rather than the other\n"
+"    way round.\n"
+"(4) The 'technique' used by setting '-flipped 1' is probably compatible with\n"
+"    absolutely nothing except another complimentary instance of 'tunala'\n"
+"    running with '-flipped 1'. :-)\n";
+
+/* Default DH parameters for use with "-dh_special standard" ... stolen striaght
+ * from s_server. */
+static unsigned char dh512_p[]={
+	0xDA,0x58,0x3C,0x16,0xD9,0x85,0x22,0x89,0xD0,0xE4,0xAF,0x75,
+	0x6F,0x4C,0xCA,0x92,0xDD,0x4B,0xE5,0x33,0xB8,0x04,0xFB,0x0F,
+	0xED,0x94,0xEF,0x9C,0x8A,0x44,0x03,0xED,0x57,0x46,0x50,0xD3,
+	0x69,0x99,0xDB,0x29,0xD7,0x76,0x27,0x6B,0xA2,0xD3,0xD4,0x12,
+	0xE2,0x18,0xF4,0xDD,0x1E,0x08,0x4C,0xF6,0xD8,0x00,0x3E,0x7C,
+	0x47,0x74,0xE8,0x33,
+	};
+static unsigned char dh512_g[]={
+	0x02,
+	};
+
+/* And the function that parses the above "standard" parameters, again, straight
+ * out of s_server. */
+static DH *get_dh512(void)
+	{
+	DH *dh=NULL;
+
+	if ((dh=DH_new()) == NULL) return(NULL);
+	dh->p=BN_bin2bn(dh512_p,sizeof(dh512_p),NULL);
+	dh->g=BN_bin2bn(dh512_g,sizeof(dh512_g),NULL);
+	if ((dh->p == NULL) || (dh->g == NULL))
+		return(NULL);
+	return(dh);
+	}
+
+/* Various help/error messages used by main() */
+static int usage(const char *errstr, int isunknownarg)
+{
+	if(isunknownarg)
+		fprintf(stderr, "Error: unknown argument '%s'\n", errstr);
+	else
+		fprintf(stderr, "Error: %s\n", errstr);
+	fprintf(stderr, "%s\n", helpstring);
+	return 1;
+}
+
+static int err_str0(const char *str0)
+{
+	fprintf(stderr, "%s\n", str0);
+	return 1;
+}
+
+static int err_str1(const char *fmt, const char *str1)
+{
+	fprintf(stderr, fmt, str1);
+	fprintf(stderr, "\n");
+	return 1;
+}
+
+static int parse_max_tunnels(const char *s, unsigned int *maxtunnels)
+{
+	unsigned long l;
+	if(!int_strtoul(s, &l) || (l < 1) || (l > 1024)) {
+		fprintf(stderr, "Error, '%s' is an invalid value for "
+				"maxtunnels\n", s);
+		return 0;
+	}
+	*maxtunnels = (unsigned int)l;
+	return 1;
+}
+
+static int parse_server_mode(const char *s, int *servermode)
+{
+	unsigned long l;
+	if(!int_strtoul(s, &l) || (l > 1)) {
+		fprintf(stderr, "Error, '%s' is an invalid value for the "
+				"server mode\n", s);
+		return 0;
+	}
+	*servermode = (int)l;
+	return 1;
+}
+
+static int parse_dh_special(const char *s, const char **dh_special)
+{
+	if((strcmp(s, "NULL") == 0) || (strcmp(s, "generate") == 0) ||
+			(strcmp(s, "standard") == 0)) {
+		*dh_special = s;
+		return 1;
+	}
+	fprintf(stderr, "Error, '%s' is an invalid value for 'dh_special'\n", s);
+	return 0;
+}
+
+static int parse_verify_level(const char *s, unsigned int *verify_level)
+{
+	unsigned long l;
+	if(!int_strtoul(s, &l) || (l > 3)) {
+		fprintf(stderr, "Error, '%s' is an invalid value for "
+				"out_verify\n", s);
+		return 0;
+	}
+	*verify_level = (unsigned int)l;
+	return 1;
+}
+
+static int parse_verify_depth(const char *s, unsigned int *verify_depth)
+{
+	unsigned long l;
+	if(!int_strtoul(s, &l) || (l < 1) || (l > 50)) {
+		fprintf(stderr, "Error, '%s' is an invalid value for "
+				"verify_depth\n", s);
+		return 0;
+	}
+	*verify_depth = (unsigned int)l;
+	return 1;
+}
+
+/* Some fprintf format strings used when tunnels close */
+static const char *io_stats_dirty =
+"    SSL traffic;   %8lu bytes in, %8lu bytes out\n";
+static const char *io_stats_clean =
+"    clear traffic; %8lu bytes in, %8lu bytes out\n";
+
+int main(int argc, char *argv[])
+{
+	unsigned int loop;
+	int newfd;
+	tunala_world_t world;
+	tunala_item_t *t_item;
+	const char *proxy_ip;
+	unsigned short proxy_port;
+	/* Overridables */
+	const char *proxyhost = def_proxyhost;
+	const char *listenhost = def_listenhost;
+	unsigned int max_tunnels = def_max_tunnels;
+	const char *cacert = def_cacert;
+	const char *cert = def_cert;
+	const char *key = def_key;
+	const char *dcert = def_dcert;
+	const char *dkey = def_dkey;
+	const char *engine_id = def_engine_id;
+	int server_mode = def_server_mode;
+	int flipped = def_flipped;
+	const char *cipher_list = def_cipher_list;
+	const char *dh_file = def_dh_file;
+	const char *dh_special = def_dh_special;
+	int tmp_rsa = def_tmp_rsa;
+	int ctx_options = def_ctx_options;
+	int verify_mode = def_verify_mode;
+	unsigned int verify_depth = def_verify_depth;
+	int out_state = def_out_state;
+	unsigned int out_verify = def_out_verify;
+	int out_totals = def_out_totals;
+	int out_conns = def_out_conns;
+
+/* Parse command-line arguments */
+next_arg:
+	argc--; argv++;
+	if(argc > 0) {
+		if(strcmp(*argv, "-listen") == 0) {
+			if(argc < 2)
+				return usage("-listen requires an argument", 0);
+			argc--; argv++;
+			listenhost = *argv;
+			goto next_arg;
+		} else if(strcmp(*argv, "-proxy") == 0) {
+			if(argc < 2)
+				return usage("-proxy requires an argument", 0);
+			argc--; argv++;
+			proxyhost = *argv;
+			goto next_arg;
+		} else if(strcmp(*argv, "-maxtunnels") == 0) {
+			if(argc < 2)
+				return usage("-maxtunnels requires an argument", 0);
+			argc--; argv++;
+			if(!parse_max_tunnels(*argv, &max_tunnels))
+				return 1;
+			goto next_arg;
+		} else if(strcmp(*argv, "-cacert") == 0) {
+			if(argc < 2)
+				return usage("-cacert requires an argument", 0);
+			argc--; argv++;
+			if(strcmp(*argv, "NULL") == 0)
+				cacert = NULL;
+			else
+				cacert = *argv;
+			goto next_arg;
+		} else if(strcmp(*argv, "-cert") == 0) {
+			if(argc < 2)
+				return usage("-cert requires an argument", 0);
+			argc--; argv++;
+			if(strcmp(*argv, "NULL") == 0)
+				cert = NULL;
+			else
+				cert = *argv;
+			goto next_arg;
+		} else if(strcmp(*argv, "-key") == 0) {
+			if(argc < 2)
+				return usage("-key requires an argument", 0);
+			argc--; argv++;
+			if(strcmp(*argv, "NULL") == 0)
+				key = NULL;
+			else
+				key = *argv;
+			goto next_arg;
+		} else if(strcmp(*argv, "-dcert") == 0) {
+			if(argc < 2)
+				return usage("-dcert requires an argument", 0);
+			argc--; argv++;
+			if(strcmp(*argv, "NULL") == 0)
+				dcert = NULL;
+			else
+				dcert = *argv;
+			goto next_arg;
+		} else if(strcmp(*argv, "-dkey") == 0) {
+			if(argc < 2)
+				return usage("-dkey requires an argument", 0);
+			argc--; argv++;
+			if(strcmp(*argv, "NULL") == 0)
+				dkey = NULL;
+			else
+				dkey = *argv;
+			goto next_arg;
+		} else if(strcmp(*argv, "-engine") == 0) {
+			if(argc < 2)
+				return usage("-engine requires an argument", 0);
+			argc--; argv++;
+			engine_id = *argv;
+			goto next_arg;
+		} else if(strcmp(*argv, "-server") == 0) {
+			if(argc < 2)
+				return usage("-server requires an argument", 0);
+			argc--; argv++;
+			if(!parse_server_mode(*argv, &server_mode))
+				return 1;
+			goto next_arg;
+		} else if(strcmp(*argv, "-flipped") == 0) {
+			if(argc < 2)
+				return usage("-flipped requires an argument", 0);
+			argc--; argv++;
+			if(!parse_server_mode(*argv, &flipped))
+				return 1;
+			goto next_arg;
+		} else if(strcmp(*argv, "-cipher") == 0) {
+			if(argc < 2)
+				return usage("-cipher requires an argument", 0);
+			argc--; argv++;
+			cipher_list = *argv;
+			goto next_arg;
+		} else if(strcmp(*argv, "-dh_file") == 0) {
+			if(argc < 2)
+				return usage("-dh_file requires an argument", 0);
+			if(dh_special)
+				return usage("cannot mix -dh_file with "
+						"-dh_special", 0);
+			argc--; argv++;
+			dh_file = *argv;
+			goto next_arg;
+		} else if(strcmp(*argv, "-dh_special") == 0) {
+			if(argc < 2)
+				return usage("-dh_special requires an argument", 0);
+			if(dh_file)
+				return usage("cannot mix -dh_file with "
+						"-dh_special", 0);
+			argc--; argv++;
+			if(!parse_dh_special(*argv, &dh_special))
+				return 1;
+			goto next_arg;
+		} else if(strcmp(*argv, "-no_tmp_rsa") == 0) {
+			tmp_rsa = 0;
+			goto next_arg;
+		} else if(strcmp(*argv, "-no_ssl2") == 0) {
+			ctx_options |= SSL_OP_NO_SSLv2;
+			goto next_arg;
+		} else if(strcmp(*argv, "-no_ssl3") == 0) {
+			ctx_options |= SSL_OP_NO_SSLv3;
+			goto next_arg;
+		} else if(strcmp(*argv, "-no_tls1") == 0) {
+			ctx_options |= SSL_OP_NO_TLSv1;
+			goto next_arg;
+		} else if(strcmp(*argv, "-v_peer") == 0) {
+			verify_mode |= SSL_VERIFY_PEER;
+			goto next_arg;
+		} else if(strcmp(*argv, "-v_strict") == 0) {
+			verify_mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
+			goto next_arg;
+		} else if(strcmp(*argv, "-v_once") == 0) {
+			verify_mode |= SSL_VERIFY_CLIENT_ONCE;
+			goto next_arg;
+		} else if(strcmp(*argv, "-v_depth") == 0) {
+			if(argc < 2)
+				return usage("-v_depth requires an argument", 0);
+			argc--; argv++;
+			if(!parse_verify_depth(*argv, &verify_depth))
+				return 1;
+			goto next_arg;
+		} else if(strcmp(*argv, "-out_state") == 0) {
+			out_state = 1;
+			goto next_arg;
+		} else if(strcmp(*argv, "-out_verify") == 0) {
+			if(argc < 2)
+				return usage("-out_verify requires an argument", 0);
+			argc--; argv++;
+			if(!parse_verify_level(*argv, &out_verify))
+				return 1;
+			goto next_arg;
+		} else if(strcmp(*argv, "-out_totals") == 0) {
+			out_totals = 1;
+			goto next_arg;
+		} else if(strcmp(*argv, "-out_conns") == 0) {
+			out_conns = 1;
+			goto next_arg;
+		} else if((strcmp(*argv, "-h") == 0) ||
+				(strcmp(*argv, "-help") == 0) ||
+				(strcmp(*argv, "-?") == 0)) {
+			fprintf(stderr, "%s\n", helpstring);
+			return 0;
+		} else
+			return usage(*argv, 1);
+	}
+	/* Run any sanity checks we want here */
+	if(!cert && !dcert && server_mode)
+		fprintf(stderr, "WARNING: you are running an SSL server without "
+				"a certificate - this may not work!\n");
+
+	/* Initialise network stuff */
+	if(!ip_initialise())
+		return err_str0("ip_initialise failed");
+	/* Create the SSL_CTX */
+	if((world.ssl_ctx = initialise_ssl_ctx(server_mode, engine_id,
+			cacert, cert, key, dcert, dkey, cipher_list, dh_file,
+			dh_special, tmp_rsa, ctx_options, out_state, out_verify,
+			verify_mode, verify_depth)) == NULL)
+		return err_str1("initialise_ssl_ctx(engine_id=%s) failed",
+			(engine_id == NULL) ? "NULL" : engine_id);
+	if(engine_id)
+		fprintf(stderr, "Info, engine '%s' initialised\n", engine_id);
+	/* Create the listener */
+	if((world.listen_fd = ip_create_listener(listenhost)) == -1)
+		return err_str1("ip_create_listener(%s) failed", listenhost);
+	fprintf(stderr, "Info, listening on '%s'\n", listenhost);
+	if(!ip_parse_address(proxyhost, &proxy_ip, &proxy_port, 0))
+		return err_str1("ip_parse_address(%s) failed", proxyhost);
+	fprintf(stderr, "Info, proxying to '%s' (%d.%d.%d.%d:%d)\n", proxyhost,
+			(int)proxy_ip[0], (int)proxy_ip[1],
+			(int)proxy_ip[2], (int)proxy_ip[3], (int)proxy_port);
+	fprintf(stderr, "Info, set maxtunnels to %d\n", (int)max_tunnels);
+	fprintf(stderr, "Info, set to operate as an SSL %s\n",
+			(server_mode ? "server" : "client"));
+	/* Initialise the rest of the stuff */
+	world.tunnels_used = world.tunnels_size = 0;
+	world.tunnels = NULL;
+	world.server_mode = server_mode;
+	selector_init(&world.selector);
+
+/* We're ready to loop */
+main_loop:
+	/* Should we listen for *new* tunnels? */
+	if(world.tunnels_used < max_tunnels)
+		selector_add_listener(&world.selector, world.listen_fd);
+	/* We should add in our existing tunnels */
+	for(loop = 0; loop < world.tunnels_used; loop++)
+		selector_add_tunala(&world.selector, world.tunnels + loop);
+	/* Now do the select */
+	switch(selector_select(&world.selector)) {
+	case -1:
+		if(errno != EINTR) {
+			fprintf(stderr, "selector_select returned a "
+					"badness error.\n");
+			goto shouldnt_happen;
+		}
+		fprintf(stderr, "Warn, selector interrupted by a signal\n");
+		goto main_loop;
+	case 0:
+		fprintf(stderr, "Warn, selector_select returned 0 - signal?""?\n");
+		goto main_loop;
+	default:
+		break;
+	}
+	/* Accept new connection if we should and can */
+	if((world.tunnels_used < max_tunnels) && (selector_get_listener(
+					&world.selector, world.listen_fd,
+					&newfd) == 1)) {
+		/* We have a new connection */
+		if(!tunala_world_new_item(&world, newfd, proxy_ip,
+						proxy_port, flipped))
+			fprintf(stderr, "tunala_world_new_item failed\n");
+		else if(out_conns)
+			fprintf(stderr, "Info, new tunnel opened, now up to "
+					"%d\n", world.tunnels_used);
+	}
+	/* Give each tunnel its moment, note the while loop is because it makes
+	 * the logic easier than with "for" to deal with an array that may shift
+	 * because of deletes. */
+	loop = 0;
+	t_item = world.tunnels;
+	while(loop < world.tunnels_used) {
+		if(!tunala_item_io(&world.selector, t_item)) {
+			/* We're closing whether for reasons of an error or a
+			 * natural close. Don't increment loop or t_item because
+			 * the next item is moving to us! */
+			if(!out_totals)
+				goto skip_totals;
+			fprintf(stderr, "Tunnel closing, traffic stats follow\n");
+			/* Display the encrypted (over the network) stats */
+			fprintf(stderr, io_stats_dirty,
+				buffer_total_in(state_machine_get_buffer(
+						&t_item->sm,SM_DIRTY_IN)),
+				buffer_total_out(state_machine_get_buffer(
+						&t_item->sm,SM_DIRTY_OUT)));
+			/* Display the local (tunnelled) stats. NB: Data we
+			 * *receive* is data sent *out* of the state_machine on
+			 * its 'clean' side. Hence the apparent back-to-front
+			 * OUT/IN mixup here :-) */
+			fprintf(stderr, io_stats_clean,
+				buffer_total_out(state_machine_get_buffer(
+						&t_item->sm,SM_CLEAN_OUT)),
+				buffer_total_in(state_machine_get_buffer(
+						&t_item->sm,SM_CLEAN_IN)));
+skip_totals:
+			tunala_world_del_item(&world, loop);
+			if(out_conns)
+				fprintf(stderr, "Info, tunnel closed, down to %d\n",
+					world.tunnels_used);
+		}
+		else {
+			/* Move to the next item */
+			loop++;
+			t_item++;
+		}
+	}
+	goto main_loop;
+	/* Should never get here */
+shouldnt_happen:
+	abort();
+	return 1;
+}
+
+/****************/
+/* OpenSSL bits */
+/****************/
+
+static int ctx_set_cert(SSL_CTX *ctx, const char *cert, const char *key)
+{
+	FILE *fp = NULL;
+	X509 *x509 = NULL;
+	EVP_PKEY *pkey = NULL;
+	int toret = 0; /* Assume an error */
+
+	/* cert */
+	if(cert) {
+		if((fp = fopen(cert, "r")) == NULL) {
+			fprintf(stderr, "Error opening cert file '%s'\n", cert);
+			goto err;
+		}
+		if(!PEM_read_X509(fp, &x509, NULL, NULL)) {
+			fprintf(stderr, "Error reading PEM cert from '%s'\n",
+					cert);
+			goto err;
+		}
+		if(!SSL_CTX_use_certificate(ctx, x509)) {
+			fprintf(stderr, "Error, cert in '%s' can not be used\n",
+					cert);
+			goto err;
+		}
+		/* Clear the FILE* for reuse in the "key" code */
+		fclose(fp);
+		fp = NULL;
+		fprintf(stderr, "Info, operating with cert in '%s'\n", cert);
+		/* If a cert was given without matching key, we assume the same
+		 * file contains the required key. */
+		if(!key)
+			key = cert;
+	} else {
+		if(key)
+			fprintf(stderr, "Error, can't specify a key without a "
+					"corresponding certificate\n");
+		else
+			fprintf(stderr, "Error, ctx_set_cert called with "
+					"NULLs!\n");
+		goto err;
+	}
+	/* key */
+	if(key) {
+		if((fp = fopen(key, "r")) == NULL) {
+			fprintf(stderr, "Error opening key file '%s'\n", key);
+			goto err;
+		}
+		if(!PEM_read_PrivateKey(fp, &pkey, NULL, NULL)) {
+			fprintf(stderr, "Error reading PEM key from '%s'\n",
+					key);
+			goto err;
+		}
+		if(!SSL_CTX_use_PrivateKey(ctx, pkey)) {
+			fprintf(stderr, "Error, key in '%s' can not be used\n",
+					key);
+			goto err;
+		}
+		fprintf(stderr, "Info, operating with key in '%s'\n", key);
+	} else
+		fprintf(stderr, "Info, operating without a cert or key\n");
+	/* Success */
+	toret = 1; err:
+	if(x509)
+		X509_free(x509);
+	if(pkey)
+		EVP_PKEY_free(pkey);
+	if(fp)
+		fclose(fp);
+	return toret;
+}
+
+static int ctx_set_dh(SSL_CTX *ctx, const char *dh_file, const char *dh_special)
+{
+	DH *dh = NULL;
+	FILE *fp = NULL;
+
+	if(dh_special) {
+		if(strcmp(dh_special, "NULL") == 0)
+			return 1;
+		if(strcmp(dh_special, "standard") == 0) {
+			if((dh = get_dh512()) == NULL) {
+				fprintf(stderr, "Error, can't parse 'standard'"
+						" DH parameters\n");
+				return 0;
+			}
+			fprintf(stderr, "Info, using 'standard' DH parameters\n");
+			goto do_it;
+		}
+		if(strcmp(dh_special, "generate") != 0)
+			/* This shouldn't happen - screening values is handled
+			 * in main(). */
+			abort();
+		fprintf(stderr, "Info, generating DH parameters ... ");
+		fflush(stderr);
+		if((dh = DH_generate_parameters(512, DH_GENERATOR_5,
+					NULL, NULL)) == NULL) {
+			fprintf(stderr, "error!\n");
+			return 0;
+		}
+		fprintf(stderr, "complete\n");
+		goto do_it;
+	}
+	/* So, we're loading dh_file */
+	if((fp = fopen(dh_file, "r")) == NULL) {
+		fprintf(stderr, "Error, couldn't open '%s' for DH parameters\n",
+				dh_file);
+		return 0;
+	}
+	dh = PEM_read_DHparams(fp, NULL, NULL, NULL);
+	fclose(fp);
+	if(dh == NULL) {
+		fprintf(stderr, "Error, could not parse DH parameters from '%s'\n",
+				dh_file);
+		return 0;
+	}
+	fprintf(stderr, "Info, using DH parameters from file '%s'\n", dh_file);
+do_it:
+	SSL_CTX_set_tmp_dh(ctx, dh);
+	DH_free(dh);
+	return 1;
+}
+
+static SSL_CTX *initialise_ssl_ctx(int server_mode, const char *engine_id,
+		const char *CAfile, const char *cert, const char *key,
+		const char *dcert, const char *dkey, const char *cipher_list,
+		const char *dh_file, const char *dh_special, int tmp_rsa,
+		int ctx_options, int out_state, int out_verify, int verify_mode,
+		unsigned int verify_depth)
+{
+	SSL_CTX *ctx = NULL, *ret = NULL;
+	SSL_METHOD *meth;
+	ENGINE *e = NULL;
+
+        OpenSSL_add_ssl_algorithms();
+        SSL_load_error_strings();
+
+	meth = (server_mode ? SSLv23_server_method() : SSLv23_client_method());
+	if(meth == NULL)
+		goto err;
+	if(engine_id) {
+		ENGINE_load_builtin_engines();
+		if((e = ENGINE_by_id(engine_id)) == NULL) {
+			fprintf(stderr, "Error obtaining '%s' engine, openssl "
+					"errors follow\n", engine_id);
+			goto err;
+		}
+		if(!ENGINE_set_default(e, ENGINE_METHOD_ALL)) {
+			fprintf(stderr, "Error assigning '%s' engine, openssl "
+					"errors follow\n", engine_id);
+			goto err;
+		}
+		ENGINE_free(e);
+	}
+	if((ctx = SSL_CTX_new(meth)) == NULL)
+		goto err;
+	/* cacert */
+	if(CAfile) {
+		if(!X509_STORE_load_locations(SSL_CTX_get_cert_store(ctx),
+					CAfile, NULL)) {
+			fprintf(stderr, "Error loading CA cert(s) in '%s'\n",
+					CAfile);
+			goto err;
+		}
+		fprintf(stderr, "Info, operating with CA cert(s) in '%s'\n",
+				CAfile);
+	} else
+		fprintf(stderr, "Info, operating without a CA cert(-list)\n");
+	if(!SSL_CTX_set_default_verify_paths(ctx)) {
+		fprintf(stderr, "Error setting default verify paths\n");
+		goto err;
+	}
+
+	/* cert and key */
+	if((cert || key) && !ctx_set_cert(ctx, cert, key))
+		goto err;
+	/* dcert and dkey */
+	if((dcert || dkey) && !ctx_set_cert(ctx, dcert, dkey))
+		goto err;
+	/* temporary RSA key generation */
+	if(tmp_rsa)
+		SSL_CTX_set_tmp_rsa_callback(ctx, cb_generate_tmp_rsa);
+
+	/* cipher_list */
+	if(cipher_list) {
+		if(!SSL_CTX_set_cipher_list(ctx, cipher_list)) {
+			fprintf(stderr, "Error setting cipher list '%s'\n",
+					cipher_list);
+			goto err;
+		}
+		fprintf(stderr, "Info, set cipher list '%s'\n", cipher_list);
+	} else
+		fprintf(stderr, "Info, operating with default cipher list\n");
+
+	/* dh_file & dh_special */
+	if((dh_file || dh_special) && !ctx_set_dh(ctx, dh_file, dh_special))
+		goto err;
+
+	/* ctx_options */
+	SSL_CTX_set_options(ctx, ctx_options);
+
+	/* out_state (output of SSL handshake states to screen). */
+	if(out_state)
+		cb_ssl_info_set_output(stderr);
+
+	/* out_verify */
+	if(out_verify > 0) {
+		cb_ssl_verify_set_output(stderr);
+		cb_ssl_verify_set_level(out_verify);
+	}
+
+	/* verify_depth */
+	cb_ssl_verify_set_depth(verify_depth);
+
+	/* Success! (includes setting verify_mode) */
+	SSL_CTX_set_info_callback(ctx, cb_ssl_info);
+	SSL_CTX_set_verify(ctx, verify_mode, cb_ssl_verify);
+	ret = ctx;
+err:
+	if(!ret) {
+		ERR_print_errors_fp(stderr);
+		if(ctx)
+			SSL_CTX_free(ctx);
+	}
+	return ret;
+}
+
+/*****************/
+/* Selector bits */
+/*****************/
+
+static void selector_sets_init(select_sets_t *s)
+{
+	s->max = 0;
+	FD_ZERO(&s->reads);
+	FD_ZERO(&s->sends);
+	FD_ZERO(&s->excepts);
+}
+static void selector_init(tunala_selector_t *selector)
+{
+	selector_sets_init(&selector->last_selected);
+	selector_sets_init(&selector->next_select);
+}
+
+#define SEL_EXCEPTS 0x00
+#define SEL_READS   0x01
+#define SEL_SENDS   0x02
+static void selector_add_raw_fd(tunala_selector_t *s, int fd, int flags)
+{
+	FD_SET(fd, &s->next_select.excepts);
+	if(flags & SEL_READS)
+		FD_SET(fd, &s->next_select.reads);
+	if(flags & SEL_SENDS)
+		FD_SET(fd, &s->next_select.sends);
+	/* Adjust "max" */
+	if(s->next_select.max < (fd + 1))
+		s->next_select.max = fd + 1;
+}
+
+static void selector_add_listener(tunala_selector_t *selector, int fd)
+{
+	selector_add_raw_fd(selector, fd, SEL_READS);
+}
+
+static void selector_add_tunala(tunala_selector_t *s, tunala_item_t *t)
+{
+	/* Set clean read if sm.clean_in is not full */
+	if(t->clean_read != -1) {
+		selector_add_raw_fd(s, t->clean_read,
+			(buffer_full(state_machine_get_buffer(&t->sm,
+				SM_CLEAN_IN)) ? SEL_EXCEPTS : SEL_READS));
+	}
+	/* Set clean send if sm.clean_out is not empty */
+	if(t->clean_send != -1) {
+		selector_add_raw_fd(s, t->clean_send,
+			(buffer_empty(state_machine_get_buffer(&t->sm,
+				SM_CLEAN_OUT)) ? SEL_EXCEPTS : SEL_SENDS));
+	}
+	/* Set dirty read if sm.dirty_in is not full */
+	if(t->dirty_read != -1) {
+		selector_add_raw_fd(s, t->dirty_read,
+			(buffer_full(state_machine_get_buffer(&t->sm,
+				SM_DIRTY_IN)) ? SEL_EXCEPTS : SEL_READS));
+	}
+	/* Set dirty send if sm.dirty_out is not empty */
+	if(t->dirty_send != -1) {
+		selector_add_raw_fd(s, t->dirty_send,
+			(buffer_empty(state_machine_get_buffer(&t->sm,
+				SM_DIRTY_OUT)) ? SEL_EXCEPTS : SEL_SENDS));
+	}
+}
+
+static int selector_select(tunala_selector_t *selector)
+{
+	memcpy(&selector->last_selected, &selector->next_select,
+			sizeof(select_sets_t));
+	selector_sets_init(&selector->next_select);
+	return select(selector->last_selected.max,
+			&selector->last_selected.reads,
+			&selector->last_selected.sends,
+			&selector->last_selected.excepts, NULL);
+}
+
+/* This returns -1 for error, 0 for no new connections, or 1 for success, in
+ * which case *newfd is populated. */
+static int selector_get_listener(tunala_selector_t *selector, int fd, int *newfd)
+{
+	if(FD_ISSET(fd, &selector->last_selected.excepts))
+		return -1;
+	if(!FD_ISSET(fd, &selector->last_selected.reads))
+		return 0;
+	if((*newfd = ip_accept_connection(fd)) == -1)
+		return -1;
+	return 1;
+}
+
+/************************/
+/* "Tunala" world stuff */
+/************************/
+
+static int tunala_world_make_room(tunala_world_t *world)
+{
+	unsigned int newsize;
+	tunala_item_t *newarray;
+
+	if(world->tunnels_used < world->tunnels_size)
+		return 1;
+	newsize = (world->tunnels_size == 0 ? 16 :
+			((world->tunnels_size * 3) / 2));
+	if((newarray = malloc(newsize * sizeof(tunala_item_t))) == NULL)
+		return 0;
+	memset(newarray, 0, newsize * sizeof(tunala_item_t));
+	if(world->tunnels_used > 0)
+		memcpy(newarray, world->tunnels,
+			world->tunnels_used * sizeof(tunala_item_t));
+	if(world->tunnels_size > 0)
+		free(world->tunnels);
+	/* migrate */
+	world->tunnels = newarray;
+	world->tunnels_size = newsize;
+	return 1;
+}
+
+static int tunala_world_new_item(tunala_world_t *world, int fd,
+		const char *ip, unsigned short port, int flipped)
+{
+	tunala_item_t *item;
+	int newfd;
+	SSL *new_ssl = NULL;
+
+	if(!tunala_world_make_room(world))
+		return 0;
+	if((new_ssl = SSL_new(world->ssl_ctx)) == NULL) {
+		fprintf(stderr, "Error creating new SSL\n");
+		ERR_print_errors_fp(stderr);
+		return 0;
+	}
+	item = world->tunnels + (world->tunnels_used++);
+	state_machine_init(&item->sm);
+	item->clean_read = item->clean_send =
+		item->dirty_read = item->dirty_send = -1;
+	if((newfd = ip_create_connection_split(ip, port)) == -1)
+		goto err;
+	/* Which way round? If we're a server, "fd" is the dirty side and the
+	 * connection we open is the clean one. For a client, it's the other way
+	 * around. Unless, of course, we're "flipped" in which case everything
+	 * gets reversed. :-) */
+	if((world->server_mode && !flipped) ||
+			(!world->server_mode && flipped)) {
+		item->dirty_read = item->dirty_send = fd;
+		item->clean_read = item->clean_send = newfd;
+	} else {
+		item->clean_read = item->clean_send = fd;
+		item->dirty_read = item->dirty_send = newfd;
+	}
+	/* We use the SSL's "app_data" to indicate a call-back induced "kill" */
+	SSL_set_app_data(new_ssl, NULL);
+	if(!state_machine_set_SSL(&item->sm, new_ssl, world->server_mode))
+		goto err;
+	return 1;
+err:
+	tunala_world_del_item(world, world->tunnels_used - 1);
+	return 0;
+
+}
+
+static void tunala_world_del_item(tunala_world_t *world, unsigned int idx)
+{
+	tunala_item_t *item = world->tunnels + idx;
+	if(item->clean_read != -1)
+		close(item->clean_read);
+	if(item->clean_send != item->clean_read)
+		close(item->clean_send);
+	item->clean_read = item->clean_send = -1;
+	if(item->dirty_read != -1)
+		close(item->dirty_read);
+	if(item->dirty_send != item->dirty_read)
+		close(item->dirty_send);
+	item->dirty_read = item->dirty_send = -1;
+	state_machine_close(&item->sm);
+	/* OK, now we fix the item array */
+	if(idx + 1 < world->tunnels_used)
+		/* We need to scroll entries to the left */
+		memmove(world->tunnels + idx,
+				world->tunnels + (idx + 1),
+				(world->tunnels_used - (idx + 1)) *
+					sizeof(tunala_item_t));
+	world->tunnels_used--;
+}
+
+static int tunala_item_io(tunala_selector_t *selector, tunala_item_t *item)
+{
+	int c_r, c_s, d_r, d_s; /* Four boolean flags */
+
+	/* Take ourselves out of the gene-pool if there was an except */
+	if((item->clean_read != -1) && FD_ISSET(item->clean_read,
+				&selector->last_selected.excepts))
+		return 0;
+	if((item->clean_send != -1) && FD_ISSET(item->clean_send,
+				&selector->last_selected.excepts))
+		return 0;
+	if((item->dirty_read != -1) && FD_ISSET(item->dirty_read,
+				&selector->last_selected.excepts))
+		return 0;
+	if((item->dirty_send != -1) && FD_ISSET(item->dirty_send,
+				&selector->last_selected.excepts))
+		return 0;
+	/* Grab our 4 IO flags */
+	c_r = c_s = d_r = d_s = 0;
+	if(item->clean_read != -1)
+		c_r = FD_ISSET(item->clean_read, &selector->last_selected.reads);
+	if(item->clean_send != -1)
+		c_s = FD_ISSET(item->clean_send, &selector->last_selected.sends);
+	if(item->dirty_read != -1)
+		d_r = FD_ISSET(item->dirty_read, &selector->last_selected.reads);
+	if(item->dirty_send != -1)
+		d_s = FD_ISSET(item->dirty_send, &selector->last_selected.sends);
+	/* If no IO has happened for us, skip needless data looping */
+	if(!c_r && !c_s && !d_r && !d_s)
+		return 1;
+	if(c_r)
+		c_r = (buffer_from_fd(state_machine_get_buffer(&item->sm,
+				SM_CLEAN_IN), item->clean_read) <= 0);
+	if(c_s)
+		c_s = (buffer_to_fd(state_machine_get_buffer(&item->sm,
+				SM_CLEAN_OUT), item->clean_send) <= 0);
+	if(d_r)
+		d_r = (buffer_from_fd(state_machine_get_buffer(&item->sm,
+				SM_DIRTY_IN), item->dirty_read) <= 0);
+	if(d_s)
+		d_s = (buffer_to_fd(state_machine_get_buffer(&item->sm,
+				SM_DIRTY_OUT), item->dirty_send) <= 0);
+	/* If any of the flags is non-zero, that means they need closing */
+	if(c_r) {
+		close(item->clean_read);
+		if(item->clean_send == item->clean_read)
+			item->clean_send = -1;
+		item->clean_read = -1;
+	}
+	if(c_s && (item->clean_send != -1)) {
+		close(item->clean_send);
+		if(item->clean_send == item->clean_read)
+			item->clean_read = -1;
+		item->clean_send = -1;
+	}
+	if(d_r) {
+		close(item->dirty_read);
+		if(item->dirty_send == item->dirty_read)
+			item->dirty_send = -1;
+		item->dirty_read = -1;
+	}
+	if(d_s && (item->dirty_send != -1)) {
+		close(item->dirty_send);
+		if(item->dirty_send == item->dirty_read)
+			item->dirty_read = -1;
+		item->dirty_send = -1;
+	}
+	/* This function name is attributed to the term donated by David
+	 * Schwartz on openssl-dev, message-ID:
+	 * <NCBBLIEPOCNJOAEKBEAKEEDGLIAA.davids@webmaster.com>. :-) */
+	if(!state_machine_churn(&item->sm))
+		/* If the SSL closes, it will also zero-out the _in buffers
+		 * and will in future process just outgoing data. As and
+		 * when the outgoing data has gone, it will return zero
+		 * here to tell us to bail out. */
+		return 0;
+	/* Otherwise, we return zero if both sides are dead. */
+	if(((item->clean_read == -1) || (item->clean_send == -1)) &&
+			((item->dirty_read == -1) || (item->dirty_send == -1)))
+		return 0;
+	/* If only one side closed, notify the SSL of this so it can take
+	 * appropriate action. */
+	if((item->clean_read == -1) || (item->clean_send == -1)) {
+		if(!state_machine_close_clean(&item->sm))
+			return 0;
+	}
+	if((item->dirty_read == -1) || (item->dirty_send == -1)) {
+		if(!state_machine_close_dirty(&item->sm))
+			return 0;
+	}
+	return 1;
+}
+