[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;
    gnutls_priority_t ciphers;
    struct namedcreds **ncreds;
};

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

struct savedsess {
    struct savedsess *next, *prev;
    gnutls_datum_t key, value;
};

static int numconn = 0, numsess = 0;
static struct btree *sessidx = NULL;
static struct savedsess *sesslistf = NULL, *sesslistl = NULL;

static int sesscmp(void *ap, void *bp)
{
    struct savedsess *a = ap, *b = bp;
    
    if(a->key.size != b->key.size)
	return(a->key.size - b->key.size);
    return(memcmp(a->key.data, b->key.data, a->key.size));
}

static gnutls_datum_t sessdbfetch(void *uudata, gnutls_datum_t key)
{
    struct savedsess *sess, lkey;
    gnutls_datum_t ret;
    
    memset(&ret, 0, sizeof(ret));
    lkey.key = key;
    if((sess = btreeget(sessidx, &lkey, sesscmp)) == NULL)
	return(ret);
    ret.data = memcpy(gnutls_malloc(ret.size = sess->value.size), sess->value.data, sess->value.size);
    return(ret);
}

static void freesess(struct savedsess *sess)
{
    bbtreedel(&sessidx, sess, sesscmp);
    if(sess->next)
	sess->next->prev = sess->prev;
    if(sess->prev)
	sess->prev->next = sess->next;
    if(sess == sesslistf)
	sesslistf = sess->next;
    if(sess == sesslistl)
	sesslistl = sess->prev;
    free(sess->key.data);
    free(sess->value.data);
    free(sess);
    numsess--;
}

static int sessdbdel(void *uudata, gnutls_datum_t key)
{
    struct savedsess *sess, lkey;
    
    lkey.key = key;
    if((sess = btreeget(sessidx, &lkey, sesscmp)) == NULL)
	return(-1);
    freesess(sess);
    return(0);
}

static void cleansess(void)
{
    while(numsess > (max(numconn, 1) * 100))
	freesess(sesslistl);
}

static int sessdbstore(void *uudata, gnutls_datum_t key, gnutls_datum_t value)
{
    static int cc = 0;
    struct savedsess *sess, lkey;
    
    if((value.data == NULL) || (value.size == 0)) {
	sessdbdel(NULL, key);
	return(0);
    }
    lkey.key = key;
    if((sess = btreeget(sessidx, &lkey, sesscmp)) == NULL) {
	omalloc(sess);
	sess->key.data = memcpy(smalloc(sess->key.size = key.size), key.data, key.size);
	sess->value.data = memcpy(smalloc(sess->value.size = value.size), value.data, value.size);
	bbtreeput(&sessidx, sess, sesscmp);
	sess->prev = NULL;
	sess->next = sesslistf;
	if(sesslistf)
	    sesslistf->prev = sess;
	sesslistf = sess;
	if(sesslistl == NULL)
	    sesslistl = sess;
	numsess++;
    } else {
	free(sess->value.data);
	sess->value.data = memcpy(smalloc(sess->value.size = value.size), value.data, value.size);
	if(sess != sesslistf) {
	    if(sess->next)
		sess->next->prev = sess->prev;
	    if(sess->prev)
		sess->prev->next = sess->next;
	    if(sess == sesslistl)
		sesslistl = sess->prev;
	    sess->prev = NULL;
	    sess->next = sesslistf;
	    if(sesslistf)
		sesslistf->prev = sess;
	    sesslistf = sess;
	}
    }
    if(cc++ > 100) {
	cleansess();
	cc = 0;
    }
    return(0);
}

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)
{
    struct sslconn *ssl = cookie;
    
    buffree(ssl->in);
    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);
    }

    numconn++;
    fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
    gnutls_init(&sess, GNUTLS_SERVER);
    gnutls_priority_set(sess, pd->ciphers);
    gnutls_db_set_retrieve_function(sess, sessdbfetch);
    gnutls_db_set_store_function(sess, sessdbstore);
    gnutls_db_set_remove_function(sess, sessdbdel);
    gnutls_db_set_ptr(sess, NULL);
    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);
    numconn--;
}

static void listenloop(struct muth *muth, va_list args)
{
    vavar(struct sslport *, pd);
    int i, ns, n;
    struct sockaddr_storage name;
    socklen_t namelen;
    
    fcntl(pd->fd, F_SETFL, fcntl(pd->fd, F_GETFL) | O_NONBLOCK);
    while(1) {
	namelen = sizeof(name);
	if(block(pd->fd, EV_READ, 0) == 0)
	    goto out;
	n = 0;
	while(1) {
	    ns = accept(pd->fd, (struct sockaddr *)&name, &namelen);
	    if(ns < 0) {
		if(errno == EAGAIN)
		    break;
		if(errno == ECONNABORTED)
		    continue;
		flog(LOG_ERR, "accept: %s", strerror(errno));
		goto out;
	    }
	    mustart(servessl, ns, name, pd);
	    if(++n >= 100)
		break;
	}
    }
    
out:
    close(pd->fd);
    free(pd);
    for(i = 0; i < listeners.d; i++) {
	if(listeners.b[i] == muth)
	    bufdel(listeners, i);
    }
}

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

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);
    }
}

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;
    gnutls_priority_t ciphers;
    struct ncredbuf ncreds;
    struct sslport *pd;
    char *crtfile, *keyfile, *perr;
    
    init();
    port = 443;
    bufinit(ncreds);
    gnutls_certificate_allocate_credentials(&creds);
    keyfile = crtfile = NULL;
    ciphers = 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("\tprio=PRIORITIES [NORMAL]\n");
	    printf("\t\tCiphersuite priorities, as a GnuTLS priority string.\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], "prio")) {
	    if(ciphers != NULL)
		gnutls_priority_deinit(ciphers);
	    ret = gnutls_priority_init(&ciphers, argv[i], (const char **)&perr);
	    if(ret == GNUTLS_E_INVALID_REQUEST) {
		flog(LOG_ERR, "ssl: invalid cipher priority string, at `%s'", perr);
		exit(1);
	    } else if(ret != 0) {
		flog(LOG_ERR, "ssl: could not initialize cipher priorities: %s", gnutls_strerror(ret));
		exit(1);
	    }
	} 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((fd = listensock6(port)) < 0) {
	flog(LOG_ERR, "could not listen on IPv6 port (port %i): %s", port, strerror(errno));
	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);
    }
    if((ciphers == NULL) && ((ret = gnutls_priority_init(&ciphers, "NORMAL", NULL)) != 0)) {
	flog(LOG_ERR, "ssl: could not initialize cipher priorities: %s", gnutls_strerror(ret));
	exit(1);
    }
    gnutls_certificate_set_dh_params(creds, dhparams());
    bufadd(ncreds, NULL);
    omalloc(pd);
    pd->fd = fd;
    pd->sport = port;
    pd->creds = creds;
    pd->ncreds = ncreds.b;
    pd->ciphers = ciphers;
    bufadd(listeners, mustart(listenloop, pd));
    if((fd = listensock4(port)) < 0) {
	if(errno != EADDRINUSE) {
	    flog(LOG_ERR, "could not listen on IPv4 port (port %i): %s", port, strerror(errno));
	    exit(1);
	}
    } else {
	omalloc(pd);
	pd->fd = fd;
	pd->sport = port;
	pd->creds = creds;
	pd->ncreds = ncreds.b;
	pd->ciphers = ciphers;
	bufadd(listeners, 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;
76d6825e	59	gnutls_priority_t ciphers;
28b2e619	60	struct namedcreds **ncreds;
6ca53b2e FT	61	};
	62
	63	struct sslconn {
	64	int fd;
	65	struct sslport *port;
	66	struct sockaddr_storage name;
	67	gnutls_session_t sess;
	68	struct charbuf in;
	69	};
	70
d8d4ed57 FT	71	struct savedsess {
	72	struct savedsess next, prev;
	73	gnutls_datum_t key, value;
	74	};
	75
	76	static int numconn = 0, numsess = 0;
	77	static struct btree *sessidx = NULL;
	78	static struct savedsess sesslistf = NULL, sesslistl = NULL;
	79
	80	static int sesscmp(void ap, void bp)
	81	{
	82	struct savedsess a = ap, b = bp;
	83
	84	if(a->key.size != b->key.size)
	85	return(a->key.size - b->key.size);
	86	return(memcmp(a->key.data, b->key.data, a->key.size));
	87	}
	88
	89	static gnutls_datum_t sessdbfetch(void *uudata, gnutls_datum_t key)
	90	{
	91	struct savedsess *sess, lkey;
	92	gnutls_datum_t ret;
	93
	94	memset(&ret, 0, sizeof(ret));
	95	lkey.key = key;
	96	if((sess = btreeget(sessidx, &lkey, sesscmp)) == NULL)
	97	return(ret);
	98	ret.data = memcpy(gnutls_malloc(ret.size = sess->value.size), sess->value.data, sess->value.size);
	99	return(ret);
	100	}
	101
	102	static void freesess(struct savedsess *sess)
	103	{
	104	bbtreedel(&sessidx, sess, sesscmp);
	105	if(sess->next)
	106	sess->next->prev = sess->prev;
	107	if(sess->prev)
	108	sess->prev->next = sess->next;
	109	if(sess == sesslistf)
	110	sesslistf = sess->next;
	111	if(sess == sesslistl)
	112	sesslistl = sess->prev;
	113	free(sess->key.data);
	114	free(sess->value.data);
	115	free(sess);
	116	numsess--;
	117	}
	118
	119	static int sessdbdel(void *uudata, gnutls_datum_t key)
	120	{
	121	struct savedsess *sess, lkey;
	122
	123	lkey.key = key;
	124	if((sess = btreeget(sessidx, &lkey, sesscmp)) == NULL)
	125	return(-1);
	126	freesess(sess);
	127	return(0);
	128	}
	129
	130	static void cleansess(void)
	131	{
	132	while(numsess > (max(numconn, 1) * 100))
	133	freesess(sesslistl);
	134	}
135
136	static int sessdbstore(void *uudata, gnutls_datum_t key, gnutls_datum_t value)
137	{
138	static int cc = 0;
139	struct savedsess *sess, lkey;
140
141	if((value.data == NULL) \|\| (value.size == 0)) {
142	sessdbdel(NULL, key);
143	return(0);
144	}
145	lkey.key = key;
146	if((sess = btreeget(sessidx, &lkey, sesscmp)) == NULL) {
147	omalloc(sess);
148	sess->key.data = memcpy(smalloc(sess->key.size = key.size), key.data, key.size);
149	sess->value.data = memcpy(smalloc(sess->value.size = value.size), value.data, value.size);
150	bbtreeput(&sessidx, sess, sesscmp);
151	sess->prev = NULL;
152	sess->next = sesslistf;
153	if(sesslistf)
154	sesslistf->prev = sess;
155	sesslistf = sess;
156	if(sesslistl == NULL)
157	sesslistl = sess;
158	numsess++;
159	} else {
160	free(sess->value.data);
161	sess->value.data = memcpy(smalloc(sess->value.size = value.size), value.data, value.size);
162	if(sess != sesslistf) {
163	if(sess->next)
164	sess->next->prev = sess->prev;
165	if(sess->prev)
166	sess->prev->next = sess->next;
167	if(sess == sesslistl)
168	sesslistl = sess->prev;
169	sess->prev = NULL;
170	sess->next = sesslistf;
171	if(sesslistf)
172	sesslistf->prev = sess;
173	sesslistf = sess;
174	}
175	}
176	if(cc++ > 100) {
177	cleansess();
178	cc = 0;
179	}
180	return(0);
181	}
182
6ca53b2e FT	183	static int tlsblock(int fd, gnutls_session_t sess, time_t to)
	184	{
	185	if(gnutls_record_get_direction(sess))
	186	return(block(fd, EV_WRITE, to));
	187	else
	188	return(block(fd, EV_READ, to));
	189	}
	190
	191	static ssize_t sslread(void cookie, char buf, size_t len)
	192	{
	193	struct sslconn *ssl = cookie;
	194	ssize_t xf;
	195	int ret;
	196
	197	while(ssl->in.d == 0) {
	198	sizebuf(ssl->in, ssl->in.d + 1024);
	199	ret = gnutls_record_recv(ssl->sess, ssl->in.b + ssl->in.d, ssl->in.s - ssl->in.d);
	200	if((ret == GNUTLS_E_INTERRUPTED) \|\| (ret == GNUTLS_E_AGAIN)) {
	201	if(tlsblock(ssl->fd, ssl->sess, 60) == 0) {
	202	errno = ETIMEDOUT;
	203	return(-1);
	204	}
	205	} else if(ret < 0) {
	206	errno = EIO;
	207	return(-1);
	208	} else if(ret == 0) {
	209	return(0);
	210	} else {
	211	ssl->in.d += ret;
	212	}
	213	}
	214	xf = min(ssl->in.d, len);
	215	memcpy(buf, ssl->in.b, xf);
	216	memmove(ssl->in.b, ssl->in.b + xf, ssl->in.d -= xf);
	217	return(xf);
	218	}
	219
	220	static ssize_t sslwrite(void cookie, const char buf, size_t len)
	221	{
	222	struct sslconn *ssl = cookie;
	223	int ret;
	224	size_t off;
	225
	226	off = 0;
	227	while(off < len) {
	228	ret = gnutls_record_send(ssl->sess, buf + off, len - off);
	229	if((ret == GNUTLS_E_INTERRUPTED) \|\| (ret == GNUTLS_E_AGAIN)) {
	230	if(tlsblock(ssl->fd, ssl->sess, 60) == 0) {
	231	if(off == 0) {
	232	errno = ETIMEDOUT;
	233	return(-1);
	234	}
	235	return(off);
	236	}
	237	} else if(ret < 0) {
	238	if(off == 0) {
	239	errno = EIO;
	240	return(-1);
	241	}
	242	return(off);
	243	} else {
	244	off += ret;
	245	}
	246	}
247	return(off);
248	}
249
250	static int sslclose(void *cookie)
251	{
5ba5dd0b FT	252	struct sslconn *ssl = cookie;
	253
	254	buffree(ssl->in);
6ca53b2e FT	255	return(0);
	256	}
	257
	258	static cookie_io_functions_t iofuns = {
	259	.read = sslread,
	260	.write = sslwrite,
	261	.close = sslclose,
	262	};
	263
	264	static int initreq(struct conn conn, struct hthead req)
	265	{
	266	struct sslconn *ssl = conn->pdata;
6b84641a FT	267	struct sockaddr_storage sa;
6b84641a FT	268	socklen_t salen;
6ca53b2e FT	269	char nmbuf[256];
6ca53b2e FT	270
7595e3a4	271	headappheader(req, "X-Ash-Address", formathaddress((struct sockaddr *)&ssl->name, sizeof(sa)));
6ca53b2e FT	272	if(ssl->name.ss_family == AF_INET) {
	273	headappheader(req, "X-Ash-Address", inet_ntop(AF_INET, &((struct sockaddr_in *)&ssl->name)->sin_addr, nmbuf, sizeof(nmbuf)));
	274	headappheader(req, "X-Ash-Port", sprintf3("%i", ntohs(((struct sockaddr_in *)&ssl->name)->sin_port)));
	275	} else if(ssl->name.ss_family == AF_INET6) {
	276	headappheader(req, "X-Ash-Address", inet_ntop(AF_INET6, &((struct sockaddr_in6 *)&ssl->name)->sin6_addr, nmbuf, sizeof(nmbuf)));
	277	headappheader(req, "X-Ash-Port", sprintf3("%i", ntohs(((struct sockaddr_in6 *)&ssl->name)->sin6_port)));
	278	}
6b84641a	279	salen = sizeof(sa);
7595e3a4 FT	280	if(!getsockname(ssl->fd, (struct sockaddr *)&sa, &salen))
7595e3a4 FT	281	headappheader(req, "X-Ash-Server-Address", formathaddress((struct sockaddr *)&sa, sizeof(sa)));
6ca53b2e FT	282	headappheader(req, "X-Ash-Server-Port", sprintf3("%i", ssl->port->sport));
	283	headappheader(req, "X-Ash-Protocol", "https");
	284	return(0);
	285	}
	286
	287	static void servessl(struct muth *muth, va_list args)
	288	{
	289	vavar(int, fd);
	290	vavar(struct sockaddr_storage, name);
	291	vavar(struct sslport *, pd);
	292	struct conn conn;
	293	struct sslconn ssl;
	294	gnutls_session_t sess;
	295	int ret;
	296	FILE *in;
	297
1b77e192 FT	298	int setcreds(gnutls_session_t sess)
1b77e192 FT	299	{
28b2e619	300	int i, o, u;
1b77e192 FT	301	unsigned int ntype;
	302	char nambuf[256];
	303	size_t namlen;
	304
	305	for(i = 0; 1; i++) {
	306	namlen = sizeof(nambuf);
	307	if(gnutls_server_name_get(sess, nambuf, &namlen, &ntype, i) != 0)
	308	break;
	309	if(ntype != GNUTLS_NAME_DNS)
	310	continue;
28b2e619 FT	311	for(o = 0; pd->ncreds[o] != NULL; o++) {
	312	for(u = 0; pd->ncreds[o]->names[u] != NULL; u++) {
	313	if(!strcmp(pd->ncreds[o]->names[u], nambuf)) {
	314	gnutls_credentials_set(sess, GNUTLS_CRD_CERTIFICATE, pd->ncreds[o]->creds);
	315	gnutls_certificate_server_set_request(sess, GNUTLS_CERT_REQUEST);
	316	return(0);
	317	}
	318	}
	319	}
1b77e192 FT	320	}
	321	gnutls_credentials_set(sess, GNUTLS_CRD_CERTIFICATE, pd->creds);
	322	gnutls_certificate_server_set_request(sess, GNUTLS_CERT_REQUEST);
	323	return(0);
	324	}
	325
d8d4ed57	326	numconn++;
6ca53b2e FT	327	fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) \| O_NONBLOCK);
6ca53b2e FT	328	gnutls_init(&sess, GNUTLS_SERVER);
76d6825e	329	gnutls_priority_set(sess, pd->ciphers);
d8d4ed57 FT	330	gnutls_db_set_retrieve_function(sess, sessdbfetch);
	331	gnutls_db_set_store_function(sess, sessdbstore);
	332	gnutls_db_set_remove_function(sess, sessdbdel);
	333	gnutls_db_set_ptr(sess, NULL);
1b77e192	334	gnutls_handshake_set_post_client_hello_function(sess, setcreds);
6ca53b2e FT	335	gnutls_transport_set_ptr(sess, (gnutls_transport_ptr_t)(intptr_t)fd);
	336	while((ret = gnutls_handshake(sess)) != 0) {
	337	if((ret != GNUTLS_E_INTERRUPTED) && (ret != GNUTLS_E_AGAIN))
	338	goto out;
	339	if(tlsblock(fd, sess, 60) <= 0)
	340	goto out;
	341	}
	342	memset(&conn, 0, sizeof(conn));
	343	memset(&ssl, 0, sizeof(ssl));
	344	conn.pdata = &ssl;
	345	conn.initreq = initreq;
	346	ssl.fd = fd;
	347	ssl.port = pd;
	348	ssl.name = name;
	349	ssl.sess = sess;
	350	bufinit(ssl.in);
	351	in = fopencookie(&ssl, "r+", iofuns);
	352	serve(in, &conn);
	353
	354	out:
	355	gnutls_deinit(sess);
	356	close(fd);
d8d4ed57	357	numconn--;
6ca53b2e FT	358	}
	359
	360	static void listenloop(struct muth *muth, va_list args)
	361	{
	362	vavar(struct sslport *, pd);
f24b7bb5	363	int i, ns, n;
6ca53b2e FT	364	struct sockaddr_storage name;
	365	socklen_t namelen;
	366
3ae56649	367	fcntl(pd->fd, F_SETFL, fcntl(pd->fd, F_GETFL) \| O_NONBLOCK);
6ca53b2e FT	368	while(1) {
6ca53b2e FT	369	namelen = sizeof(name);
cac13158 FT	370	if(block(pd->fd, EV_READ, 0) == 0)
cac13158 FT	371	goto out;
f24b7bb5 FT	372	n = 0;
	373	while(1) {
	374	ns = accept(pd->fd, (struct sockaddr *)&name, &namelen);
	375	if(ns < 0) {
	376	if(errno == EAGAIN)
	377	break;
51893006 FT	378	if(errno == ECONNABORTED)
51893006 FT	379	continue;
f24b7bb5 FT	380	flog(LOG_ERR, "accept: %s", strerror(errno));
	381	goto out;
	382	}
	383	mustart(servessl, ns, name, pd);
	384	if(++n >= 100)
	385	break;
6ca53b2e	386	}
6ca53b2e FT	387	}
	388
	389	out:
	390	close(pd->fd);
	391	free(pd);
8e9ec020 FT	392	for(i = 0; i < listeners.d; i++) {
	393	if(listeners.b[i] == muth)
	394	bufdel(listeners, i);
	395	}
6ca53b2e FT	396	}
6ca53b2e FT	397
2daf4411 FT	398	static gnutls_dh_params_t dhparams(void)
	399	{
	400	static int inited = 0;
	401	static gnutls_dh_params_t pars;
	402	int ret;
	403
	404	if(!inited) {
	405	if(((ret = gnutls_dh_params_init(&pars)) != 0) \|\|
	406	((ret = gnutls_dh_params_generate2(pars, 2048)) != 0)) {
	407	flog(LOG_ERR, "GnuTLS could not generate Diffie-Hellman parameters: %s", gnutls_strerror(ret));
	408	exit(1);
	409	}
	410	inited = 1;
	411	}
	412	return(pars);
	413	}
	414
6ca53b2e FT	415	static void init(void)
	416	{
	417	static int inited = 0;
	418	int ret;
	419
	420	if(inited)
	421	return;
	422	inited = 1;
	423	if((ret = gnutls_global_init()) != 0) {
	424	flog(LOG_ERR, "could not initialize GnuTLS: %s", gnutls_strerror(ret));
	425	exit(1);
	426	}
6ca53b2e FT	427	}
6ca53b2e FT	428
28b2e619 FT	429	static struct namedcreds readncreds(char file)
	430	{
	431	int i, fd, ret;
	432	struct namedcreds *nc;
	433	gnutls_x509_crt_t crt;
	434	gnutls_x509_privkey_t key;
	435	char cn[1024];
	436	size_t cnl;
	437	gnutls_datum_t d;
	438	struct charbuf keybuf;
	439	struct charvbuf names;
	440	unsigned int type;
	441
	442	bufinit(keybuf);
	443	bufinit(names);
	444	if((fd = open(file, O_RDONLY)) < 0) {
	445	flog(LOG_ERR, "ssl: %s: %s", file, strerror(errno));
	446	exit(1);
	447	}
	448	while(1) {
	449	sizebuf(keybuf, keybuf.d + 1024);
	450	ret = read(fd, keybuf.b + keybuf.d, keybuf.s - keybuf.d);
	451	if(ret < 0) {
	452	flog(LOG_ERR, "ssl: reading from %s: %s", file, strerror(errno));
	453	exit(1);
	454	} else if(ret == 0) {
	455	break;
	456	}
	457	keybuf.d += ret;
	458	}
	459	close(fd);
	460	d.data = (unsigned char *)keybuf.b;
	461	d.size = keybuf.d;
	462	gnutls_x509_crt_init(&crt);
	463	if((ret = gnutls_x509_crt_import(crt, &d, GNUTLS_X509_FMT_PEM)) != 0) {
	464	flog(LOG_ERR, "ssl: could not load certificate from %s: %s", file, gnutls_strerror(ret));
	465	exit(1);
	466	}
	467	cnl = sizeof(cn) - 1;
	468	if((ret = gnutls_x509_crt_get_dn_by_oid(crt, GNUTLS_OID_X520_COMMON_NAME, 0, 0, cn, &cnl)) != 0) {
	469	flog(LOG_ERR, "ssl: could not read common name from %s: %s", file, gnutls_strerror(ret));
	470	exit(1);
	471	}
	472	cn[cnl] = 0;
	473	bufadd(names, sstrdup(cn));
	474	for(i = 0; 1; i++) {
	475	cnl = sizeof(cn) - 1;
	476	if(gnutls_x509_crt_get_subject_alt_name2(crt, i, cn, &cnl, &type, NULL) < 0)
	477	break;
	478	cn[cnl] = 0;
	479	if(type == GNUTLS_SAN_DNSNAME)
	480	bufadd(names, sstrdup(cn));
	481	}
	482	gnutls_x509_privkey_init(&key);
	483	if((ret = gnutls_x509_privkey_import(key, &d, GNUTLS_X509_FMT_PEM)) != 0) {
	484	flog(LOG_ERR, "ssl: could not load key from %s: %s", file, gnutls_strerror(ret));
	485	exit(1);
	486	}
	487	buffree(keybuf);
	488	bufadd(names, NULL);
	489	omalloc(nc);
	490	nc->names = names.b;
	491	gnutls_certificate_allocate_credentials(&nc->creds);
	492	if((ret = gnutls_certificate_set_x509_key(nc->creds, &crt, 1, key)) != 0) {
493	flog(LOG_ERR, "ssl: could not use certificate from %s: %s", file, gnutls_strerror(ret));
494	exit(1);
495	}
2daf4411	496	gnutls_certificate_set_dh_params(nc->creds, dhparams());
28b2e619 FT	497	return(nc);
	498	}
	499
26902200 FT	500	static void readncdir(struct ncredbuf buf, char dir)
	501	{
	502	DIR *d;
	503	struct dirent *e;
	504	size_t es;
	505
	506	if((d = opendir(dir)) == NULL) {
	507	flog(LOG_ERR, "ssl: could not read certificate directory %s: %s", dir, strerror(errno));
	508	exit(1);
	509	}
	510	while((e = readdir(d)) != NULL) {
	511	if(e->d_name[0] == '.')
	512	continue;
	513	if((es = strlen(e->d_name)) <= 4)
	514	continue;
	515	if(strcmp(e->d_name + es - 4, ".crt"))
	516	continue;
	517	bufadd(*buf, readncreds(sprintf3("%s/%s", dir, e->d_name)));
	518	}
	519	closedir(d);
	520	}
	521
6ca53b2e FT	522	void handlegnussl(int argc, char argp, char argv)
	523	{
	524	int i, ret, port, fd;
	525	gnutls_certificate_credentials_t creds;
76d6825e	526	gnutls_priority_t ciphers;
28b2e619	527	struct ncredbuf ncreds;
6ca53b2e	528	struct sslport *pd;
76d6825e	529	char crtfile, keyfile, *perr;
6ca53b2e FT	530
	531	init();
	532	port = 443;
28b2e619	533	bufinit(ncreds);
6ca53b2e FT	534	gnutls_certificate_allocate_credentials(&creds);
6ca53b2e FT	535	keyfile = crtfile = NULL;
76d6825e	536	ciphers = NULL;
6ca53b2e FT	537	for(i = 0; i < argc; i++) {
	538	if(!strcmp(argp[i], "help")) {
	539	printf("ssl handler parameters:\n");
	540	printf("\tcert=CERT-FILE [mandatory]\n");
	541	printf("\t\tThe name of the file to read the certificate from.\n");
	542	printf("\tkey=KEY-FILE [same as CERT-FILE]\n");
	543	printf("\t\tThe name of the file to read the private key from.\n");
76d6825e FT	544	printf("\tprio=PRIORITIES [NORMAL]\n");
76d6825e FT	545	printf("\t\tCiphersuite priorities, as a GnuTLS priority string.\n");
6ca53b2e FT	546	printf("\ttrust=CA-FILE [no default]\n");
	547	printf("\t\tThe name of a file to read trusted certificates from.\n");
	548	printf("\t\tMay be given multiple times.\n");
	549	printf("\tcrl=CRL-FILE [no default]\n");
	550	printf("\t\tThe name of a file to read revocation lists from.\n");
	551	printf("\t\tMay be given multiple times.\n");
4094af22 FT	552	printf("\tncert=CERT-FILE [no default]\n");
	553	printf("\t\tThe name of a file to read a named certificate from,\n");
	554	printf("\t\tfor use with SNI-enabled clients.\n");
	555	printf("\t\tMay be given multiple times.\n");
	556	printf("\tncertdir=DIR [no default]\n");
	557	printf("\t\tRead all *.crt files in the given directory as if they\n");
	558	printf("\t\twere given with `ncert' options.\n");
	559	printf("\t\tMay be given multiple times.\n");
6ca53b2e FT	560	printf("\tport=PORT [443]\n");
	561	printf("\t\tThe TCP port to listen on.\n");
	562	printf("\n");
	563	printf("\tAll X.509 data files must be PEM-encoded.\n");
4094af22 FT	564	printf("\tIf any certificates were given with `ncert' options, they will be\n");
	565	printf("\tused if a client explicitly names one of them with a\n");
	566	printf("\tserver-name indication. If a client indicates no server name,\n");
	567	printf("\tor if a server-name indication does not match any given\n");
	568	printf("\tcertificate, the certificate given with the `cert' option will\n");
	569	printf("\tbe used instead.\n");
6ca53b2e FT	570	exit(0);
	571	} else if(!strcmp(argp[i], "cert")) {
	572	crtfile = argv[i];
	573	} else if(!strcmp(argp[i], "key")) {
	574	keyfile = argv[i];
76d6825e FT	575	} else if(!strcmp(argp[i], "prio")) {
	576	if(ciphers != NULL)
	577	gnutls_priority_deinit(ciphers);
	578	ret = gnutls_priority_init(&ciphers, argv[i], (const char **)&perr);
	579	if(ret == GNUTLS_E_INVALID_REQUEST) {
	580	flog(LOG_ERR, "ssl: invalid cipher priority string, at `%s'", perr);
	581	exit(1);
	582	} else if(ret != 0) {
	583	flog(LOG_ERR, "ssl: could not initialize cipher priorities: %s", gnutls_strerror(ret));
	584	exit(1);
	585	}
6ca53b2e FT	586	} else if(!strcmp(argp[i], "trust")) {
	587	if((ret = gnutls_certificate_set_x509_trust_file(creds, argv[i], GNUTLS_X509_FMT_PEM)) != 0) {
	588	flog(LOG_ERR, "ssl: could not load trust file `%s': %s", argv[i], gnutls_strerror(ret));
	589	exit(1);
	590	}
28b2e619 FT	591	for(i = 0; i < ncreds.d; i++) {
	592	if((ret = gnutls_certificate_set_x509_trust_file(ncreds.b[i]->creds, argv[i], GNUTLS_X509_FMT_PEM)) != 0) {
	593	flog(LOG_ERR, "ssl: could not load trust file `%s': %s", argv[i], gnutls_strerror(ret));
	594	exit(1);
	595	}
	596	}
6ca53b2e FT	597	} else if(!strcmp(argp[i], "crl")) {
	598	if((ret = gnutls_certificate_set_x509_crl_file(creds, argv[i], GNUTLS_X509_FMT_PEM)) != 0) {
	599	flog(LOG_ERR, "ssl: could not load CRL file `%s': %s", argv[i], gnutls_strerror(ret));
	600	exit(1);
	601	}
28b2e619 FT	602	for(i = 0; i < ncreds.d; i++) {
	603	if((ret = gnutls_certificate_set_x509_crl_file(ncreds.b[i]->creds, argv[i], GNUTLS_X509_FMT_PEM)) != 0) {
	604	flog(LOG_ERR, "ssl: could not load CRL file `%s': %s", argv[i], gnutls_strerror(ret));
	605	exit(1);
	606	}
	607	}
6ca53b2e FT	608	} else if(!strcmp(argp[i], "port")) {
6ca53b2e FT	609	port = atoi(argv[i]);
28b2e619 FT	610	} else if(!strcmp(argp[i], "ncert")) {
28b2e619 FT	611	bufadd(ncreds, readncreds(argv[i]));
26902200 FT	612	} else if(!strcmp(argp[i], "ncertdir")) {
26902200 FT	613	readncdir(&ncreds, argv[i]);
6ca53b2e FT	614	} else {
	615	flog(LOG_ERR, "unknown parameter `%s' to ssl handler", argp[i]);
	616	exit(1);
	617	}
	618	}
	619	if(crtfile == NULL) {
	620	flog(LOG_ERR, "ssl: needs certificate file at the very least");
	621	exit(1);
	622	}
2daf4411 FT	623	if((fd = listensock6(port)) < 0) {
	624	flog(LOG_ERR, "could not listen on IPv6 port (port %i): %s", port, strerror(errno));
	625	exit(1);
	626	}
6ca53b2e FT	627	if(keyfile == NULL)
	628	keyfile = crtfile;
	629	if((ret = gnutls_certificate_set_x509_key_file(creds, crtfile, keyfile, GNUTLS_X509_FMT_PEM)) != 0) {
	630	flog(LOG_ERR, "ssl: could not load certificate or key: %s", gnutls_strerror(ret));
	631	exit(1);
	632	}
76d6825e FT	633	if((ciphers == NULL) && ((ret = gnutls_priority_init(&ciphers, "NORMAL", NULL)) != 0)) {
	634	flog(LOG_ERR, "ssl: could not initialize cipher priorities: %s", gnutls_strerror(ret));
	635	exit(1);
	636	}
2daf4411	637	gnutls_certificate_set_dh_params(creds, dhparams());
28b2e619	638	bufadd(ncreds, NULL);
6ca53b2e FT	639	omalloc(pd);
	640	pd->fd = fd;
	641	pd->sport = port;
	642	pd->creds = creds;
28b2e619	643	pd->ncreds = ncreds.b;
76d6825e	644	pd->ciphers = ciphers;
cac13158	645	bufadd(listeners, mustart(listenloop, pd));
aa06d1b3	646	if((fd = listensock4(port)) < 0) {
6ca53b2e	647	if(errno != EADDRINUSE) {
aa06d1b3	648	flog(LOG_ERR, "could not listen on IPv4 port (port %i): %s", port, strerror(errno));
6ca53b2e FT	649	exit(1);
	650	}
	651	} else {
	652	omalloc(pd);
	653	pd->fd = fd;
	654	pd->sport = port;
	655	pd->creds = creds;
76d6825e FT	656	pd->ncreds = ncreds.b;
76d6825e FT	657	pd->ciphers = ciphers;
cac13158	658	bufadd(listeners, mustart(listenloop, pd));
6ca53b2e FT	659	}
	660	}
	661
	662	#endif