[ashd.git] / src / ssl-gnutls.c

/*
    ashd - A Sane HTTP Daemon
    Copyright (C) 2008  Fredrik Tolf <fredrik@dolda2000.com>

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <dirent.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <errno.h>

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <utils.h>
#include <mt.h>
#include <mtio.h>
#include <req.h>
#include <log.h>

#include "htparser.h"

#ifdef HAVE_GNUTLS

#include <gnutls/gnutls.h>
#include <gnutls/x509.h>

struct namedcreds {
    char **names;
    gnutls_certificate_credentials_t creds;
};

struct ncredbuf {
    struct namedcreds **b;
    size_t s, d;
};

struct sslport {
    int fd;
    int sport;
    gnutls_certificate_credentials_t creds;
    struct namedcreds **ncreds;
};

struct sslconn {
    int fd;
    struct sslport *port;
    struct sockaddr_storage name;
    gnutls_session_t sess;
    struct charbuf in;
};

static gnutls_dh_params_t dhparams;

static int tlsblock(int fd, gnutls_session_t sess, time_t to)
{
    if(gnutls_record_get_direction(sess))
	return(block(fd, EV_WRITE, to));
    else
	return(block(fd, EV_READ, to));
}

static ssize_t sslread(void *cookie, char *buf, size_t len)
{
    struct sslconn *ssl = cookie;
    ssize_t xf;
    int ret;

    while(ssl->in.d == 0) {
	sizebuf(ssl->in, ssl->in.d + 1024);
	ret = gnutls_record_recv(ssl->sess, ssl->in.b + ssl->in.d, ssl->in.s - ssl->in.d);
	if((ret == GNUTLS_E_INTERRUPTED) || (ret == GNUTLS_E_AGAIN)) {
	    if(tlsblock(ssl->fd, ssl->sess, 60) == 0) {
		errno = ETIMEDOUT;
		return(-1);
	    }
	} else if(ret < 0) {
	    errno = EIO;
	    return(-1);
	} else if(ret == 0) {
	    return(0);
	} else {
	    ssl->in.d += ret;
	}
    }
    xf = min(ssl->in.d, len);
    memcpy(buf, ssl->in.b, xf);
    memmove(ssl->in.b, ssl->in.b + xf, ssl->in.d -= xf);
    return(xf);
}

static ssize_t sslwrite(void *cookie, const char *buf, size_t len)
{
    struct sslconn *ssl = cookie;
    int ret;
    size_t off;
    
    off = 0;
    while(off < len) {
	ret = gnutls_record_send(ssl->sess, buf + off, len - off);
	if((ret == GNUTLS_E_INTERRUPTED) || (ret == GNUTLS_E_AGAIN)) {
	    if(tlsblock(ssl->fd, ssl->sess, 60) == 0) {
		if(off == 0) {
		    errno = ETIMEDOUT;
		    return(-1);
		}
		return(off);
	    }
	} else if(ret < 0) {
	    if(off == 0) {
		errno = EIO;
		return(-1);
	    }
	    return(off);
	} else {
	    off += ret;
	}
    }
    return(off);
}

static int sslclose(void *cookie)
{
    return(0);
}

static cookie_io_functions_t iofuns = {
    .read = sslread,
    .write = sslwrite,
    .close = sslclose,
};

static int initreq(struct conn *conn, struct hthead *req)
{
    struct sslconn *ssl = conn->pdata;
    struct sockaddr_storage sa;
    socklen_t salen;
    char nmbuf[256];
    
    headappheader(req, "X-Ash-Address", formathaddress((struct sockaddr *)&ssl->name, sizeof(sa)));
    if(ssl->name.ss_family == AF_INET) {
	headappheader(req, "X-Ash-Address", inet_ntop(AF_INET, &((struct sockaddr_in *)&ssl->name)->sin_addr, nmbuf, sizeof(nmbuf)));
	headappheader(req, "X-Ash-Port", sprintf3("%i", ntohs(((struct sockaddr_in *)&ssl->name)->sin_port)));
    } else if(ssl->name.ss_family == AF_INET6) {
	headappheader(req, "X-Ash-Address", inet_ntop(AF_INET6, &((struct sockaddr_in6 *)&ssl->name)->sin6_addr, nmbuf, sizeof(nmbuf)));
	headappheader(req, "X-Ash-Port", sprintf3("%i", ntohs(((struct sockaddr_in6 *)&ssl->name)->sin6_port)));
    }
    salen = sizeof(sa);
    if(!getsockname(ssl->fd, (struct sockaddr *)&sa, &salen))
	headappheader(req, "X-Ash-Server-Address", formathaddress((struct sockaddr *)&sa, sizeof(sa)));
    headappheader(req, "X-Ash-Server-Port", sprintf3("%i", ssl->port->sport));
    headappheader(req, "X-Ash-Protocol", "https");
    return(0);
}

static void servessl(struct muth *muth, va_list args)
{
    vavar(int, fd);
    vavar(struct sockaddr_storage, name);
    vavar(struct sslport *, pd);
    struct conn conn;
    struct sslconn ssl;
    gnutls_session_t sess;
    int ret;
    FILE *in;
    
    int setcreds(gnutls_session_t sess)
    {
	int i, o, u;
	unsigned int ntype;
	char nambuf[256];
	size_t namlen;
	
	for(i = 0; 1; i++) {
	    namlen = sizeof(nambuf);
	    if(gnutls_server_name_get(sess, nambuf, &namlen, &ntype, i) != 0)
		break;
	    if(ntype != GNUTLS_NAME_DNS)
		continue;
	    for(o = 0; pd->ncreds[o] != NULL; o++) {
		for(u = 0; pd->ncreds[o]->names[u] != NULL; u++) {
		    if(!strcmp(pd->ncreds[o]->names[u], nambuf)) {
			gnutls_credentials_set(sess, GNUTLS_CRD_CERTIFICATE, pd->ncreds[o]->creds);
			gnutls_certificate_server_set_request(sess, GNUTLS_CERT_REQUEST);
			return(0);
		    }
		}
	    }
	}
	gnutls_credentials_set(sess, GNUTLS_CRD_CERTIFICATE, pd->creds);
	gnutls_certificate_server_set_request(sess, GNUTLS_CERT_REQUEST);
	return(0);
    }

    fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
    gnutls_init(&sess, GNUTLS_SERVER);
    gnutls_set_default_priority(sess);
    gnutls_handshake_set_post_client_hello_function(sess, setcreds);
    gnutls_transport_set_ptr(sess, (gnutls_transport_ptr_t)(intptr_t)fd);
    while((ret = gnutls_handshake(sess)) != 0) {
	if((ret != GNUTLS_E_INTERRUPTED) && (ret != GNUTLS_E_AGAIN))
	    goto out;
	if(tlsblock(fd, sess, 60) <= 0)
	    goto out;
    }
    memset(&conn, 0, sizeof(conn));
    memset(&ssl, 0, sizeof(ssl));
    conn.pdata = &ssl;
    conn.initreq = initreq;
    ssl.fd = fd;
    ssl.port = pd;
    ssl.name = name;
    ssl.sess = sess;
    bufinit(ssl.in);
    in = fopencookie(&ssl, "r+", iofuns);
    serve(in, &conn);
    
out:
    gnutls_deinit(sess);
    close(fd);
}

static void listenloop(struct muth *muth, va_list args)
{
    vavar(struct sslport *, pd);
    int ns;
    struct sockaddr_storage name;
    socklen_t namelen;
    
    while(1) {
	namelen = sizeof(name);
	block(pd->fd, EV_READ, 0);
	ns = accept(pd->fd, (struct sockaddr *)&name, &namelen);
	if(ns < 0) {
	    flog(LOG_ERR, "accept: %s", strerror(errno));
	    goto out;
	}
	mustart(servessl, ns, name, pd);
    }
    
out:
    close(pd->fd);
    free(pd);
}

static void init(void)
{
    static int inited = 0;
    int ret;
    
    if(inited)
	return;
    inited = 1;
    if((ret = gnutls_global_init()) != 0) {
	flog(LOG_ERR, "could not initialize GnuTLS: %s", gnutls_strerror(ret));
	exit(1);
    }
    if(((ret = gnutls_dh_params_init(&dhparams)) != 0) ||
       ((ret = gnutls_dh_params_generate2(dhparams, 2048)) != 0)) {
	flog(LOG_ERR, "GnuTLS could not generate Diffie-Hellman parameters: %s", gnutls_strerror(ret));
	exit(1);
    }
}

static struct namedcreds *readncreds(char *file)
{
    int i, fd, ret;
    struct namedcreds *nc;
    gnutls_x509_crt_t crt;
    gnutls_x509_privkey_t key;
    char cn[1024];
    size_t cnl;
    gnutls_datum_t d;
    struct charbuf keybuf;
    struct charvbuf names;
    unsigned int type;
    
    bufinit(keybuf);
    bufinit(names);
    if((fd = open(file, O_RDONLY)) < 0) {
	flog(LOG_ERR, "ssl: %s: %s", file, strerror(errno));
	exit(1);
    }
    while(1) {
	sizebuf(keybuf, keybuf.d + 1024);
	ret = read(fd, keybuf.b + keybuf.d, keybuf.s - keybuf.d);
	if(ret < 0) {
	    flog(LOG_ERR, "ssl: reading from %s: %s", file, strerror(errno));
	    exit(1);
	} else if(ret == 0) {
	    break;
	}
	keybuf.d += ret;
    }
    close(fd);
    d.data = (unsigned char *)keybuf.b;
    d.size = keybuf.d;
    gnutls_x509_crt_init(&crt);
    if((ret = gnutls_x509_crt_import(crt, &d, GNUTLS_X509_FMT_PEM)) != 0) {
	flog(LOG_ERR, "ssl: could not load certificate from %s: %s", file, gnutls_strerror(ret));
	exit(1);
    }
    cnl = sizeof(cn) - 1;
    if((ret = gnutls_x509_crt_get_dn_by_oid(crt, GNUTLS_OID_X520_COMMON_NAME, 0, 0, cn, &cnl)) != 0) {
	flog(LOG_ERR, "ssl: could not read common name from %s: %s", file, gnutls_strerror(ret));
	exit(1);
    }
    cn[cnl] = 0;
    bufadd(names, sstrdup(cn));
    for(i = 0; 1; i++) {
	cnl = sizeof(cn) - 1;
	if(gnutls_x509_crt_get_subject_alt_name2(crt, i, cn, &cnl, &type, NULL) < 0)
	    break;
	cn[cnl] = 0;
	if(type == GNUTLS_SAN_DNSNAME)
	    bufadd(names, sstrdup(cn));
    }
    gnutls_x509_privkey_init(&key);
    if((ret = gnutls_x509_privkey_import(key, &d, GNUTLS_X509_FMT_PEM)) != 0) {
	flog(LOG_ERR, "ssl: could not load key from %s: %s", file, gnutls_strerror(ret));
	exit(1);
    }
    buffree(keybuf);
    bufadd(names, NULL);
    omalloc(nc);
    nc->names = names.b;
    gnutls_certificate_allocate_credentials(&nc->creds);
    if((ret = gnutls_certificate_set_x509_key(nc->creds, &crt, 1, key)) != 0) {
	flog(LOG_ERR, "ssl: could not use certificate from %s: %s", file, gnutls_strerror(ret));
	exit(1);
    }
    gnutls_certificate_set_dh_params(nc->creds, dhparams);
    return(nc);
}

static void readncdir(struct ncredbuf *buf, char *dir)
{
    DIR *d;
    struct dirent *e;
    size_t es;
    
    if((d = opendir(dir)) == NULL) {
	flog(LOG_ERR, "ssl: could not read certificate directory %s: %s", dir, strerror(errno));
	exit(1);
    }
    while((e = readdir(d)) != NULL) {
	if(e->d_name[0] == '.')
	    continue;
	if((es = strlen(e->d_name)) <= 4)
	    continue;
	if(strcmp(e->d_name + es - 4, ".crt"))
	    continue;
	bufadd(*buf, readncreds(sprintf3("%s/%s", dir, e->d_name)));
    }
    closedir(d);
}

void handlegnussl(int argc, char **argp, char **argv)
{
    int i, ret, port, fd;
    gnutls_certificate_credentials_t creds;
    struct ncredbuf ncreds;
    struct sslport *pd;
    char *crtfile, *keyfile;
    
    init();
    port = 443;
    bufinit(ncreds);
    gnutls_certificate_allocate_credentials(&creds);
    keyfile = crtfile = NULL;
    for(i = 0; i < argc; i++) {
	if(!strcmp(argp[i], "help")) {
	    printf("ssl handler parameters:\n");
	    printf("\tcert=CERT-FILE  [mandatory]\n");
	    printf("\t\tThe name of the file to read the certificate from.\n");
	    printf("\tkey=KEY-FILE    [same as CERT-FILE]\n");
	    printf("\t\tThe name of the file to read the private key from.\n");
	    printf("\ttrust=CA-FILE   [no default]\n");
	    printf("\t\tThe name of a file to read trusted certificates from.\n");
	    printf("\t\tMay be given multiple times.\n");
	    printf("\tcrl=CRL-FILE    [no default]\n");
	    printf("\t\tThe name of a file to read revocation lists from.\n");
	    printf("\t\tMay be given multiple times.\n");
	    printf("\tncert=CERT-FILE [no default]\n");
	    printf("\t\tThe name of a file to read a named certificate from,\n");
	    printf("\t\tfor use with SNI-enabled clients.\n");
	    printf("\t\tMay be given multiple times.\n");
	    printf("\tncertdir=DIR    [no default]\n");
	    printf("\t\tRead all *.crt files in the given directory as if they\n");
	    printf("\t\twere given with `ncert' options.\n");
	    printf("\t\tMay be given multiple times.\n");
	    printf("\tport=PORT       [443]\n");
	    printf("\t\tThe TCP port to listen on.\n");
	    printf("\n");
	    printf("\tAll X.509 data files must be PEM-encoded.\n");
	    printf("\tIf any certificates were given with `ncert' options, they will be\n");
	    printf("\tused if a client explicitly names one of them with a\n");
	    printf("\tserver-name indication. If a client indicates no server name,\n");
	    printf("\tor if a server-name indication does not match any given\n");
	    printf("\tcertificate, the certificate given with the `cert' option will\n");
	    printf("\tbe used instead.\n");
	    exit(0);
	} else if(!strcmp(argp[i], "cert")) {
	    crtfile = argv[i];
	} else if(!strcmp(argp[i], "key")) {
	    keyfile = argv[i];
	} else if(!strcmp(argp[i], "trust")) {
	    if((ret = gnutls_certificate_set_x509_trust_file(creds, argv[i], GNUTLS_X509_FMT_PEM)) != 0) {
		flog(LOG_ERR, "ssl: could not load trust file `%s': %s", argv[i], gnutls_strerror(ret));
		exit(1);
	    }
	    for(i = 0; i < ncreds.d; i++) {
		if((ret = gnutls_certificate_set_x509_trust_file(ncreds.b[i]->creds, argv[i], GNUTLS_X509_FMT_PEM)) != 0) {
		    flog(LOG_ERR, "ssl: could not load trust file `%s': %s", argv[i], gnutls_strerror(ret));
		    exit(1);
		}
	    }
	} else if(!strcmp(argp[i], "crl")) {
	    if((ret = gnutls_certificate_set_x509_crl_file(creds, argv[i], GNUTLS_X509_FMT_PEM)) != 0) {
		flog(LOG_ERR, "ssl: could not load CRL file `%s': %s", argv[i], gnutls_strerror(ret));
		exit(1);
	    }
	    for(i = 0; i < ncreds.d; i++) {
		if((ret = gnutls_certificate_set_x509_crl_file(ncreds.b[i]->creds, argv[i], GNUTLS_X509_FMT_PEM)) != 0) {
		    flog(LOG_ERR, "ssl: could not load CRL file `%s': %s", argv[i], gnutls_strerror(ret));
		    exit(1);
		}
	    }
	} else if(!strcmp(argp[i], "port")) {
	    port = atoi(argv[i]);
	} else if(!strcmp(argp[i], "ncert")) {
	    bufadd(ncreds, readncreds(argv[i]));
	} else if(!strcmp(argp[i], "ncertdir")) {
	    readncdir(&ncreds, argv[i]);
	} else {
	    flog(LOG_ERR, "unknown parameter `%s' to ssl handler", argp[i]);
	    exit(1);
	}
    }
    if(crtfile == NULL) {
	flog(LOG_ERR, "ssl: needs certificate file at the very least");
	exit(1);
    }
    if(keyfile == NULL)
	keyfile = crtfile;
    if((ret = gnutls_certificate_set_x509_key_file(creds, crtfile, keyfile, GNUTLS_X509_FMT_PEM)) != 0) {
	flog(LOG_ERR, "ssl: could not load certificate or key: %s", gnutls_strerror(ret));
	exit(1);
    }
    gnutls_certificate_set_dh_params(creds, dhparams);
    if((fd = listensock6(port)) < 0) {
	flog(LOG_ERR, "could not listen on IPv6 port (port %i): %s", port, strerror(errno));
	exit(1);
    }
    bufadd(ncreds, NULL);
    omalloc(pd);
    pd->fd = fd;
    pd->sport = port;
    pd->creds = creds;
    pd->ncreds = ncreds.b;
    mustart(listenloop, pd);
    if((fd = listensock6(port)) < 0) {
	if(errno != EADDRINUSE) {
	    flog(LOG_ERR, "could not listen on IPv6 port (port %i): %s", port, strerror(errno));
	    exit(1);
	}
    } else {
	omalloc(pd);
	pd->fd = fd;
	pd->sport = port;
	pd->creds = creds;
	mustart(listenloop, pd);
    }
}

#endif
Commit	Line	Data
6ca53b2e FT	1	/*
	2	ashd - A Sane HTTP Daemon
	3	Copyright (C) 2008 Fredrik Tolf <fredrik@dolda2000.com>
	4
	5	This program is free software: you can redistribute it and/or modify
	6	it under the terms of the GNU General Public License as published by
	7	the Free Software Foundation, either version 3 of the License, or
	8	(at your option) any later version.
	9
	10	This program is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	GNU General Public License for more details.
	14
	15	You should have received a copy of the GNU General Public License
	16	along with this program. If not, see <http://www.gnu.org/licenses/>.
	17	*/
	18
	19	#include <stdlib.h>
	20	#include <unistd.h>
	21	#include <string.h>
	22	#include <fcntl.h>
26902200	23	#include <dirent.h>
6ca53b2e FT	24	#include <sys/socket.h>
	25	#include <netinet/in.h>
	26	#include <arpa/inet.h>
	27	#include <errno.h>
	28
	29	#ifdef HAVE_CONFIG_H
	30	#include <config.h>
	31	#endif
	32	#include <utils.h>
	33	#include <mt.h>
	34	#include <mtio.h>
	35	#include <req.h>
	36	#include <log.h>
	37
	38	#include "htparser.h"
	39
	40	#ifdef HAVE_GNUTLS
	41
	42	#include <gnutls/gnutls.h>
28b2e619 FT	43	#include <gnutls/x509.h>
	44
	45	struct namedcreds {
	46	char **names;
	47	gnutls_certificate_credentials_t creds;
	48	};
	49
	50	struct ncredbuf {
	51	struct namedcreds **b;
	52	size_t s, d;
	53	};
6ca53b2e FT	54
	55	struct sslport {
	56	int fd;
	57	int sport;
	58	gnutls_certificate_credentials_t creds;
28b2e619	59	struct namedcreds **ncreds;
6ca53b2e FT	60	};
	61
	62	struct sslconn {
	63	int fd;
	64	struct sslport *port;
	65	struct sockaddr_storage name;
	66	gnutls_session_t sess;
	67	struct charbuf in;
	68	};
	69
	70	static gnutls_dh_params_t dhparams;
	71
	72	static int tlsblock(int fd, gnutls_session_t sess, time_t to)
	73	{
	74	if(gnutls_record_get_direction(sess))
	75	return(block(fd, EV_WRITE, to));
	76	else
	77	return(block(fd, EV_READ, to));
	78	}
	79
	80	static ssize_t sslread(void cookie, char buf, size_t len)
	81	{
	82	struct sslconn *ssl = cookie;
	83	ssize_t xf;
	84	int ret;
	85
	86	while(ssl->in.d == 0) {
	87	sizebuf(ssl->in, ssl->in.d + 1024);
	88	ret = gnutls_record_recv(ssl->sess, ssl->in.b + ssl->in.d, ssl->in.s - ssl->in.d);
	89	if((ret == GNUTLS_E_INTERRUPTED) \|\| (ret == GNUTLS_E_AGAIN)) {
	90	if(tlsblock(ssl->fd, ssl->sess, 60) == 0) {
	91	errno = ETIMEDOUT;
	92	return(-1);
	93	}
	94	} else if(ret < 0) {
	95	errno = EIO;
	96	return(-1);
	97	} else if(ret == 0) {
	98	return(0);
	99	} else {
	100	ssl->in.d += ret;
	101	}
	102	}
	103	xf = min(ssl->in.d, len);
	104	memcpy(buf, ssl->in.b, xf);
	105	memmove(ssl->in.b, ssl->in.b + xf, ssl->in.d -= xf);
	106	return(xf);
	107	}
	108
	109	static ssize_t sslwrite(void cookie, const char buf, size_t len)
	110	{
	111	struct sslconn *ssl = cookie;
	112	int ret;
	113	size_t off;
	114
	115	off = 0;
	116	while(off < len) {
	117	ret = gnutls_record_send(ssl->sess, buf + off, len - off);
	118	if((ret == GNUTLS_E_INTERRUPTED) \|\| (ret == GNUTLS_E_AGAIN)) {
	119	if(tlsblock(ssl->fd, ssl->sess, 60) == 0) {
	120	if(off == 0) {
	121	errno = ETIMEDOUT;
	122	return(-1);
	123	}
124	return(off);
125	}
126	} else if(ret < 0) {
127	if(off == 0) {
128	errno = EIO;
129	return(-1);
130	}
131	return(off);
132	} else {
133	off += ret;
134	}
135	}
136	return(off);
137	}
138
139	static int sslclose(void *cookie)
140	{
141	return(0);
142	}
143
144	static cookie_io_functions_t iofuns = {
145	.read = sslread,
146	.write = sslwrite,
147	.close = sslclose,
148	};
149
150	static int initreq(struct conn conn, struct hthead req)
151	{
152	struct sslconn *ssl = conn->pdata;
6b84641a FT	153	struct sockaddr_storage sa;
6b84641a FT	154	socklen_t salen;
6ca53b2e FT	155	char nmbuf[256];
6ca53b2e FT	156
7595e3a4	157	headappheader(req, "X-Ash-Address", formathaddress((struct sockaddr *)&ssl->name, sizeof(sa)));
6ca53b2e FT	158	if(ssl->name.ss_family == AF_INET) {
	159	headappheader(req, "X-Ash-Address", inet_ntop(AF_INET, &((struct sockaddr_in *)&ssl->name)->sin_addr, nmbuf, sizeof(nmbuf)));
	160	headappheader(req, "X-Ash-Port", sprintf3("%i", ntohs(((struct sockaddr_in *)&ssl->name)->sin_port)));
	161	} else if(ssl->name.ss_family == AF_INET6) {
	162	headappheader(req, "X-Ash-Address", inet_ntop(AF_INET6, &((struct sockaddr_in6 *)&ssl->name)->sin6_addr, nmbuf, sizeof(nmbuf)));
	163	headappheader(req, "X-Ash-Port", sprintf3("%i", ntohs(((struct sockaddr_in6 *)&ssl->name)->sin6_port)));
	164	}
6b84641a	165	salen = sizeof(sa);
7595e3a4 FT	166	if(!getsockname(ssl->fd, (struct sockaddr *)&sa, &salen))
7595e3a4 FT	167	headappheader(req, "X-Ash-Server-Address", formathaddress((struct sockaddr *)&sa, sizeof(sa)));
6ca53b2e FT	168	headappheader(req, "X-Ash-Server-Port", sprintf3("%i", ssl->port->sport));
	169	headappheader(req, "X-Ash-Protocol", "https");
	170	return(0);
	171	}
	172
	173	static void servessl(struct muth *muth, va_list args)
	174	{
	175	vavar(int, fd);
	176	vavar(struct sockaddr_storage, name);
	177	vavar(struct sslport *, pd);
	178	struct conn conn;
	179	struct sslconn ssl;
	180	gnutls_session_t sess;
	181	int ret;
	182	FILE *in;
	183
1b77e192 FT	184	int setcreds(gnutls_session_t sess)
1b77e192 FT	185	{
28b2e619	186	int i, o, u;
1b77e192 FT	187	unsigned int ntype;
	188	char nambuf[256];
	189	size_t namlen;
	190
	191	for(i = 0; 1; i++) {
	192	namlen = sizeof(nambuf);
	193	if(gnutls_server_name_get(sess, nambuf, &namlen, &ntype, i) != 0)
	194	break;
	195	if(ntype != GNUTLS_NAME_DNS)
	196	continue;
28b2e619 FT	197	for(o = 0; pd->ncreds[o] != NULL; o++) {
	198	for(u = 0; pd->ncreds[o]->names[u] != NULL; u++) {
	199	if(!strcmp(pd->ncreds[o]->names[u], nambuf)) {
	200	gnutls_credentials_set(sess, GNUTLS_CRD_CERTIFICATE, pd->ncreds[o]->creds);
	201	gnutls_certificate_server_set_request(sess, GNUTLS_CERT_REQUEST);
	202	return(0);
	203	}
	204	}
	205	}
1b77e192 FT	206	}
	207	gnutls_credentials_set(sess, GNUTLS_CRD_CERTIFICATE, pd->creds);
	208	gnutls_certificate_server_set_request(sess, GNUTLS_CERT_REQUEST);
	209	return(0);
	210	}
	211
6ca53b2e FT	212	fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) \| O_NONBLOCK);
	213	gnutls_init(&sess, GNUTLS_SERVER);
	214	gnutls_set_default_priority(sess);
1b77e192	215	gnutls_handshake_set_post_client_hello_function(sess, setcreds);
6ca53b2e FT	216	gnutls_transport_set_ptr(sess, (gnutls_transport_ptr_t)(intptr_t)fd);
	217	while((ret = gnutls_handshake(sess)) != 0) {
	218	if((ret != GNUTLS_E_INTERRUPTED) && (ret != GNUTLS_E_AGAIN))
	219	goto out;
	220	if(tlsblock(fd, sess, 60) <= 0)
	221	goto out;
	222	}
	223	memset(&conn, 0, sizeof(conn));
	224	memset(&ssl, 0, sizeof(ssl));
	225	conn.pdata = &ssl;
	226	conn.initreq = initreq;
	227	ssl.fd = fd;
	228	ssl.port = pd;
	229	ssl.name = name;
	230	ssl.sess = sess;
	231	bufinit(ssl.in);
	232	in = fopencookie(&ssl, "r+", iofuns);
	233	serve(in, &conn);
	234
	235	out:
	236	gnutls_deinit(sess);
	237	close(fd);
	238	}
	239
	240	static void listenloop(struct muth *muth, va_list args)
	241	{
	242	vavar(struct sslport *, pd);
	243	int ns;
	244	struct sockaddr_storage name;
	245	socklen_t namelen;
	246
	247	while(1) {
	248	namelen = sizeof(name);
	249	block(pd->fd, EV_READ, 0);
	250	ns = accept(pd->fd, (struct sockaddr *)&name, &namelen);
	251	if(ns < 0) {
	252	flog(LOG_ERR, "accept: %s", strerror(errno));
	253	goto out;
	254	}
	255	mustart(servessl, ns, name, pd);
	256	}
	257
	258	out:
	259	close(pd->fd);
	260	free(pd);
	261	}
	262
	263	static void init(void)
	264	{
	265	static int inited = 0;
	266	int ret;
	267
	268	if(inited)
	269	return;
	270	inited = 1;
	271	if((ret = gnutls_global_init()) != 0) {
	272	flog(LOG_ERR, "could not initialize GnuTLS: %s", gnutls_strerror(ret));
	273	exit(1);
	274	}
	275	if(((ret = gnutls_dh_params_init(&dhparams)) != 0) \|\|
	276	((ret = gnutls_dh_params_generate2(dhparams, 2048)) != 0)) {
	277	flog(LOG_ERR, "GnuTLS could not generate Diffie-Hellman parameters: %s", gnutls_strerror(ret));
	278	exit(1);
	279	}
280	}
281
28b2e619 FT	282	static struct namedcreds readncreds(char file)
	283	{
	284	int i, fd, ret;
	285	struct namedcreds *nc;
	286	gnutls_x509_crt_t crt;
	287	gnutls_x509_privkey_t key;
	288	char cn[1024];
	289	size_t cnl;
	290	gnutls_datum_t d;
	291	struct charbuf keybuf;
	292	struct charvbuf names;
	293	unsigned int type;
	294
	295	bufinit(keybuf);
	296	bufinit(names);
	297	if((fd = open(file, O_RDONLY)) < 0) {
	298	flog(LOG_ERR, "ssl: %s: %s", file, strerror(errno));
	299	exit(1);
	300	}
	301	while(1) {
	302	sizebuf(keybuf, keybuf.d + 1024);
	303	ret = read(fd, keybuf.b + keybuf.d, keybuf.s - keybuf.d);
	304	if(ret < 0) {
	305	flog(LOG_ERR, "ssl: reading from %s: %s", file, strerror(errno));
	306	exit(1);
	307	} else if(ret == 0) {
	308	break;
	309	}
	310	keybuf.d += ret;
	311	}
	312	close(fd);
	313	d.data = (unsigned char *)keybuf.b;
	314	d.size = keybuf.d;
	315	gnutls_x509_crt_init(&crt);
	316	if((ret = gnutls_x509_crt_import(crt, &d, GNUTLS_X509_FMT_PEM)) != 0) {
	317	flog(LOG_ERR, "ssl: could not load certificate from %s: %s", file, gnutls_strerror(ret));
	318	exit(1);
	319	}
	320	cnl = sizeof(cn) - 1;
	321	if((ret = gnutls_x509_crt_get_dn_by_oid(crt, GNUTLS_OID_X520_COMMON_NAME, 0, 0, cn, &cnl)) != 0) {
	322	flog(LOG_ERR, "ssl: could not read common name from %s: %s", file, gnutls_strerror(ret));
	323	exit(1);
	324	}
	325	cn[cnl] = 0;
	326	bufadd(names, sstrdup(cn));
	327	for(i = 0; 1; i++) {
	328	cnl = sizeof(cn) - 1;
	329	if(gnutls_x509_crt_get_subject_alt_name2(crt, i, cn, &cnl, &type, NULL) < 0)
	330	break;
	331	cn[cnl] = 0;
	332	if(type == GNUTLS_SAN_DNSNAME)
	333	bufadd(names, sstrdup(cn));
	334	}
	335	gnutls_x509_privkey_init(&key);
	336	if((ret = gnutls_x509_privkey_import(key, &d, GNUTLS_X509_FMT_PEM)) != 0) {
	337	flog(LOG_ERR, "ssl: could not load key from %s: %s", file, gnutls_strerror(ret));
	338	exit(1);
	339	}
	340	buffree(keybuf);
	341	bufadd(names, NULL);
	342	omalloc(nc);
	343	nc->names = names.b;
	344	gnutls_certificate_allocate_credentials(&nc->creds);
	345	if((ret = gnutls_certificate_set_x509_key(nc->creds, &crt, 1, key)) != 0) {
346	flog(LOG_ERR, "ssl: could not use certificate from %s: %s", file, gnutls_strerror(ret));
347	exit(1);
348	}
349	gnutls_certificate_set_dh_params(nc->creds, dhparams);
350	return(nc);
351	}
352
26902200 FT	353	static void readncdir(struct ncredbuf buf, char dir)
	354	{
	355	DIR *d;
	356	struct dirent *e;
	357	size_t es;
	358
	359	if((d = opendir(dir)) == NULL) {
	360	flog(LOG_ERR, "ssl: could not read certificate directory %s: %s", dir, strerror(errno));
	361	exit(1);
	362	}
	363	while((e = readdir(d)) != NULL) {
	364	if(e->d_name[0] == '.')
	365	continue;
	366	if((es = strlen(e->d_name)) <= 4)
	367	continue;
	368	if(strcmp(e->d_name + es - 4, ".crt"))
	369	continue;
	370	bufadd(*buf, readncreds(sprintf3("%s/%s", dir, e->d_name)));
	371	}
	372	closedir(d);
	373	}
	374
6ca53b2e FT	375	void handlegnussl(int argc, char argp, char argv)
	376	{
	377	int i, ret, port, fd;
	378	gnutls_certificate_credentials_t creds;
28b2e619	379	struct ncredbuf ncreds;
6ca53b2e FT	380	struct sslport *pd;
	381	char crtfile, keyfile;
	382
	383	init();
	384	port = 443;
28b2e619	385	bufinit(ncreds);
6ca53b2e FT	386	gnutls_certificate_allocate_credentials(&creds);
	387	keyfile = crtfile = NULL;
	388	for(i = 0; i < argc; i++) {
	389	if(!strcmp(argp[i], "help")) {
	390	printf("ssl handler parameters:\n");
	391	printf("\tcert=CERT-FILE [mandatory]\n");
	392	printf("\t\tThe name of the file to read the certificate from.\n");
	393	printf("\tkey=KEY-FILE [same as CERT-FILE]\n");
	394	printf("\t\tThe name of the file to read the private key from.\n");
	395	printf("\ttrust=CA-FILE [no default]\n");
	396	printf("\t\tThe name of a file to read trusted certificates from.\n");
	397	printf("\t\tMay be given multiple times.\n");
	398	printf("\tcrl=CRL-FILE [no default]\n");
	399	printf("\t\tThe name of a file to read revocation lists from.\n");
	400	printf("\t\tMay be given multiple times.\n");
4094af22 FT	401	printf("\tncert=CERT-FILE [no default]\n");
	402	printf("\t\tThe name of a file to read a named certificate from,\n");
	403	printf("\t\tfor use with SNI-enabled clients.\n");
	404	printf("\t\tMay be given multiple times.\n");
	405	printf("\tncertdir=DIR [no default]\n");
	406	printf("\t\tRead all *.crt files in the given directory as if they\n");
	407	printf("\t\twere given with `ncert' options.\n");
	408	printf("\t\tMay be given multiple times.\n");
6ca53b2e FT	409	printf("\tport=PORT [443]\n");
	410	printf("\t\tThe TCP port to listen on.\n");
	411	printf("\n");
	412	printf("\tAll X.509 data files must be PEM-encoded.\n");
4094af22 FT	413	printf("\tIf any certificates were given with `ncert' options, they will be\n");
	414	printf("\tused if a client explicitly names one of them with a\n");
	415	printf("\tserver-name indication. If a client indicates no server name,\n");
	416	printf("\tor if a server-name indication does not match any given\n");
	417	printf("\tcertificate, the certificate given with the `cert' option will\n");
	418	printf("\tbe used instead.\n");
6ca53b2e FT	419	exit(0);
	420	} else if(!strcmp(argp[i], "cert")) {
	421	crtfile = argv[i];
	422	} else if(!strcmp(argp[i], "key")) {
	423	keyfile = argv[i];
	424	} else if(!strcmp(argp[i], "trust")) {
	425	if((ret = gnutls_certificate_set_x509_trust_file(creds, argv[i], GNUTLS_X509_FMT_PEM)) != 0) {
	426	flog(LOG_ERR, "ssl: could not load trust file `%s': %s", argv[i], gnutls_strerror(ret));
	427	exit(1);
	428	}
28b2e619 FT	429	for(i = 0; i < ncreds.d; i++) {
	430	if((ret = gnutls_certificate_set_x509_trust_file(ncreds.b[i]->creds, argv[i], GNUTLS_X509_FMT_PEM)) != 0) {
	431	flog(LOG_ERR, "ssl: could not load trust file `%s': %s", argv[i], gnutls_strerror(ret));
	432	exit(1);
	433	}
	434	}
6ca53b2e FT	435	} else if(!strcmp(argp[i], "crl")) {
	436	if((ret = gnutls_certificate_set_x509_crl_file(creds, argv[i], GNUTLS_X509_FMT_PEM)) != 0) {
	437	flog(LOG_ERR, "ssl: could not load CRL file `%s': %s", argv[i], gnutls_strerror(ret));
	438	exit(1);
	439	}
28b2e619 FT	440	for(i = 0; i < ncreds.d; i++) {
	441	if((ret = gnutls_certificate_set_x509_crl_file(ncreds.b[i]->creds, argv[i], GNUTLS_X509_FMT_PEM)) != 0) {
	442	flog(LOG_ERR, "ssl: could not load CRL file `%s': %s", argv[i], gnutls_strerror(ret));
	443	exit(1);
	444	}
	445	}
6ca53b2e FT	446	} else if(!strcmp(argp[i], "port")) {
6ca53b2e FT	447	port = atoi(argv[i]);
28b2e619 FT	448	} else if(!strcmp(argp[i], "ncert")) {
28b2e619 FT	449	bufadd(ncreds, readncreds(argv[i]));
26902200 FT	450	} else if(!strcmp(argp[i], "ncertdir")) {
26902200 FT	451	readncdir(&ncreds, argv[i]);
6ca53b2e FT	452	} else {
	453	flog(LOG_ERR, "unknown parameter `%s' to ssl handler", argp[i]);
	454	exit(1);
	455	}
	456	}
	457	if(crtfile == NULL) {
	458	flog(LOG_ERR, "ssl: needs certificate file at the very least");
	459	exit(1);
	460	}
	461	if(keyfile == NULL)
	462	keyfile = crtfile;
	463	if((ret = gnutls_certificate_set_x509_key_file(creds, crtfile, keyfile, GNUTLS_X509_FMT_PEM)) != 0) {
	464	flog(LOG_ERR, "ssl: could not load certificate or key: %s", gnutls_strerror(ret));
	465	exit(1);
	466	}
	467	gnutls_certificate_set_dh_params(creds, dhparams);
	468	if((fd = listensock6(port)) < 0) {
	469	flog(LOG_ERR, "could not listen on IPv6 port (port %i): %s", port, strerror(errno));
	470	exit(1);
	471	}
28b2e619	472	bufadd(ncreds, NULL);
6ca53b2e FT	473	omalloc(pd);
	474	pd->fd = fd;
	475	pd->sport = port;
	476	pd->creds = creds;
28b2e619	477	pd->ncreds = ncreds.b;
6ca53b2e FT	478	mustart(listenloop, pd);
	479	if((fd = listensock6(port)) < 0) {
	480	if(errno != EADDRINUSE) {
	481	flog(LOG_ERR, "could not listen on IPv6 port (port %i): %s", port, strerror(errno));
	482	exit(1);
	483	}
	484	} else {
	485	omalloc(pd);
	486	pd->fd = fd;
	487	pd->sport = port;
	488	pd->creds = creds;
	489	mustart(listenloop, pd);
	490	}
	491	}
	492
	493	#endif