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opts.c
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/*-
* SSLsplit - transparent SSL/TLS interception
* https://www.roe.ch/SSLsplit
*
* Copyright (c) 2009-2019, Daniel Roethlisberger <daniel@roe.ch>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "opts.h"
#include "sys.h"
#include "log.h"
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#ifndef OPENSSL_NO_DH
#include <openssl/dh.h>
#endif /* !OPENSSL_NO_DH */
#include <openssl/x509.h>
/*
* Handle out of memory conditions in early stages of main().
* Print error message and exit with failure status code.
* Does not return.
*/
void NORET
oom_die(const char *argv0)
{
fprintf(stderr, "%s: out of memory\n", argv0);
exit(EXIT_FAILURE);
}
/*
* Load a cert/chain/key combo from a single PEM file.
* Returns NULL on failure.
*/
cert_t *
opts_load_cert_chain_key(const char *filename)
{
cert_t *cert;
cert = cert_new_load(filename);
if (!cert) {
log_err_printf("Failed to load cert and key from PEM file "
"'%s'\n", filename);
return NULL;
}
if (X509_check_private_key(cert->crt, cert->key) != 1) {
log_err_printf("Cert does not match key in PEM file "
"'%s':\n", filename);
ERR_print_errors_fp(stderr);
return NULL;
}
#ifdef DEBUG_CERTIFICATE
log_dbg_printf("Loaded '%s':\n", filename);
log_dbg_print_free(ssl_x509_to_str(cert->crt));
log_dbg_print_free(ssl_x509_to_pem(cert->crt));
#endif /* DEBUG_CERTIFICATE */
return cert;
}
opts_t *
opts_new(void)
{
opts_t *opts;
opts = malloc(sizeof(opts_t));
memset(opts, 0, sizeof(opts_t));
opts->sslcomp = 1;
opts->cachain = sk_X509_new_null();
opts->sslmethod = SSLv23_method;
opts->allow_wrong_host = 1;
return opts;
}
void
opts_free(opts_t *opts)
{
if (opts->clientcrt) {
X509_free(opts->clientcrt);
}
if (opts->clientkey) {
EVP_PKEY_free(opts->clientkey);
}
if (opts->cacrt) {
X509_free(opts->cacrt);
}
if (opts->cakey) {
EVP_PKEY_free(opts->cakey);
}
sk_X509_pop_free(opts->cachain, X509_free);
if (opts->leafkey) {
EVP_PKEY_free(opts->leafkey);
}
if (opts->leafcertdir) {
free(opts->leafcertdir);
}
if (opts->defaultleafcert) {
cert_free(opts->defaultleafcert);
}
if (opts->leafcrlurl) {
free(opts->leafcrlurl);
}
#ifndef OPENSSL_NO_DH
if (opts->dh) {
DH_free(opts->dh);
}
#endif /* !OPENSSL_NO_DH */
#ifndef OPENSSL_NO_ECDH
if (opts->ecdhcurve) {
free(opts->ecdhcurve);
}
#endif /* !OPENSSL_NO_ECDH */
if (opts->spec) {
proxyspec_free(opts->spec);
}
if (opts->ciphers) {
free(opts->ciphers);
}
#ifndef OPENSSL_NO_ENGINE
if (opts->openssl_engine) {
free(opts->openssl_engine);
}
#endif /* !OPENSSL_NO_ENGINE */
if (opts->dropuser) {
free(opts->dropuser);
}
if (opts->dropgroup) {
free(opts->dropgroup);
}
if (opts->jaildir) {
free(opts->jaildir);
}
if (opts->pidfile) {
free(opts->pidfile);
}
if (opts->connectlog) {
free(opts->connectlog);
}
if (opts->contentlog) {
free(opts->contentlog);
}
if (opts->certgendir) {
free(opts->certgendir);
}
if (opts->contentlog_basedir) {
free(opts->contentlog_basedir);
}
if (opts->masterkeylog) {
free(opts->masterkeylog);
}
if (opts->pcaplog) {
free(opts->pcaplog);
}
if (opts->pcaplog_basedir) {
free(opts->pcaplog_basedir);
}
#ifndef WITHOUT_MIRROR
if (opts->mirrorif) {
free(opts->mirrorif);
}
if (opts->mirrortarget) {
free(opts->mirrortarget);
}
#endif /* !WITHOUT_MIRROR */
memset(opts, 0, sizeof(opts_t));
free(opts);
}
/*
* Return 1 if opts_t contains a proxyspec that (eventually) uses SSL/TLS,
* 0 otherwise. When 0, it is safe to assume that no SSL/TLS operations
* will take place with this configuration.
*/
int
opts_has_ssl_spec(opts_t *opts)
{
proxyspec_t *p = opts->spec;
while (p) {
if (p->ssl || p->upgrade)
return 1;
p = p->next;
}
return 0;
}
/*
* Return 1 if opts_t contains a proxyspec with dns, 0 otherwise.
*/
int
opts_has_dns_spec(opts_t *opts)
{
proxyspec_t *p = opts->spec;
while (p) {
if (p->dns)
return 1;
p = p->next;
}
return 0;
}
/*
* Dump the SSL/TLS protocol related configuration to the debug log.
*/
void
opts_proto_dbg_dump(opts_t *opts)
{
log_dbg_printf("SSL/TLS protocol: %s%s%s%s%s%s\n",
#if (OPENSSL_VERSION_NUMBER < 0x10100000L) || defined(LIBRESSL_VERSION_NUMBER)
#ifdef HAVE_SSLV2
(opts->sslmethod == SSLv2_method) ? "ssl2" :
#endif /* HAVE_SSLV2 */
#ifdef HAVE_SSLV3
(opts->sslmethod == SSLv3_method) ? "ssl3" :
#endif /* HAVE_SSLV3 */
#ifdef HAVE_TLSV10
(opts->sslmethod == TLSv1_method) ? "tls10" :
#endif /* HAVE_TLSV10 */
#ifdef HAVE_TLSV11
(opts->sslmethod == TLSv1_1_method) ? "tls11" :
#endif /* HAVE_TLSV11 */
#ifdef HAVE_TLSV12
(opts->sslmethod == TLSv1_2_method) ? "tls12" :
#endif /* HAVE_TLSV12 */
#else /* OPENSSL_VERSION_NUMBER >= 0x10100000L */
#ifdef HAVE_SSLV3
(opts->sslversion == SSL3_VERSION) ? "ssl3" :
#endif /* HAVE_SSLV3 */
#ifdef HAVE_TLSV10
(opts->sslversion == TLS1_VERSION) ? "tls10" :
#endif /* HAVE_TLSV10 */
#ifdef HAVE_TLSV11
(opts->sslversion == TLS1_1_VERSION) ? "tls11" :
#endif /* HAVE_TLSV11 */
#ifdef HAVE_TLSV12
(opts->sslversion == TLS1_2_VERSION) ? "tls12" :
#endif /* HAVE_TLSV12 */
#endif /* OPENSSL_VERSION_NUMBER >= 0x10100000L */
"negotiate",
#ifdef HAVE_SSLV2
opts->no_ssl2 ? " -ssl2" :
#endif /* HAVE_SSLV2 */
"",
#ifdef HAVE_SSLV3
opts->no_ssl3 ? " -ssl3" :
#endif /* HAVE_SSLV3 */
"",
#ifdef HAVE_TLSV10
opts->no_tls10 ? " -tls10" :
#endif /* HAVE_TLSV10 */
"",
#ifdef HAVE_TLSV11
opts->no_tls11 ? " -tls11" :
#endif /* HAVE_TLSV11 */
"",
#ifdef HAVE_TLSV12
opts->no_tls12 ? " -tls12" :
#endif /* HAVE_TLSV12 */
"");
}
/*
* Parse proxyspecs using a simple state machine.
*/
void
proxyspec_parse(int *argc, char **argv[], const char *natengine,
proxyspec_t **opts_spec)
{
proxyspec_t *spec = NULL;
char *addr = NULL;
int af = AF_UNSPEC;
int state = 0;
while ((*argc)--) {
switch (state) {
default:
case 0:
/* tcp | ssl | http | https | autossl */
spec = malloc(sizeof(proxyspec_t));
memset(spec, 0, sizeof(proxyspec_t));
spec->next = *opts_spec;
*opts_spec = spec;
/* Defaults */
spec->ssl = 0;
spec->http = 0;
spec->upgrade = 0;
if (!strcmp(**argv, "tcp")) {
/* use defaults */
} else
if (!strcmp(**argv, "ssl")) {
spec->ssl = 1;
} else
if (!strcmp(**argv, "http")) {
spec->http = 1;
} else
if (!strcmp(**argv, "https")) {
spec->ssl = 1;
spec->http = 1;
} else
if (!strcmp(**argv, "autossl")) {
spec->upgrade = 1;
} else {
fprintf(stderr, "Unknown connection "
"type '%s'\n", **argv);
exit(EXIT_FAILURE);
}
state++;
break;
case 1:
/* listenaddr */
addr = **argv;
state++;
break;
case 2:
/* listenport */
af = sys_sockaddr_parse(&spec->listen_addr,
&spec->listen_addrlen,
addr, **argv,
sys_get_af(addr),
EVUTIL_AI_PASSIVE);
if (af == -1) {
exit(EXIT_FAILURE);
}
if (natengine) {
spec->natengine = strdup(natengine);
if (!spec->natengine) {
fprintf(stderr,
"Out of memory"
"\n");
exit(EXIT_FAILURE);
}
} else {
spec->natengine = NULL;
}
state++;
break;
case 3:
/* [ natengine | dstaddr ] */
if (!strcmp(**argv, "tcp") ||
!strcmp(**argv, "ssl") ||
!strcmp(**argv, "http") ||
!strcmp(**argv, "https") ||
!strcmp(**argv, "autossl")) {
/* implicit default natengine */
(*argv)--; (*argc)++; /* rewind */
state = 0;
} else
if (!strcmp(**argv, "sni")) {
free(spec->natengine);
spec->natengine = NULL;
if (!spec->ssl) {
fprintf(stderr,
"SNI hostname lookup "
"only works for ssl "
"and https proxyspecs"
"\n");
exit(EXIT_FAILURE);
}
state = 5;
} else
if (nat_exist(**argv)) {
/* natengine */
free(spec->natengine);
spec->natengine = strdup(**argv);
if (!spec->natengine) {
fprintf(stderr,
"Out of memory"
"\n");
exit(EXIT_FAILURE);
}
state = 0;
} else {
/* explicit target address */
free(spec->natengine);
spec->natengine = NULL;
addr = **argv;
state++;
}
break;
case 4:
/* dstport */
af = sys_sockaddr_parse(&spec->connect_addr,
&spec->connect_addrlen,
addr, **argv, af, 0);
if (af == -1) {
exit(EXIT_FAILURE);
}
state = 0;
break;
case 5:
/* SNI dstport */
spec->sni_port = atoi(**argv);
if (!spec->sni_port) {
fprintf(stderr, "Invalid port '%s'\n",
**argv);
exit(EXIT_FAILURE);
}
spec->dns = 1;
state = 0;
break;
}
(*argv)++;
}
if (state != 0 && state != 3) {
fprintf(stderr, "Incomplete proxyspec!\n");
exit(EXIT_FAILURE);
}
}
/*
* Clear and free a proxy spec.
*/
void
proxyspec_free(proxyspec_t *spec)
{
do {
proxyspec_t *next = spec->next;
if (spec->natengine)
free(spec->natengine);
memset(spec, 0, sizeof(proxyspec_t));
free(spec);
spec = next;
} while (spec);
}
/*
* Return text representation of proxy spec for display to the user.
* Returned string must be freed by caller.
*/
char *
proxyspec_str(proxyspec_t *spec)
{
char *s;
char *lhbuf, *lpbuf;
char *cbuf = NULL;
if (sys_sockaddr_str((struct sockaddr *)&spec->listen_addr,
spec->listen_addrlen, &lhbuf, &lpbuf) != 0) {
return NULL;
}
if (spec->connect_addrlen) {
char *chbuf, *cpbuf;
if (sys_sockaddr_str((struct sockaddr *)&spec->connect_addr,
spec->connect_addrlen,
&chbuf, &cpbuf) != 0) {
return NULL;
}
if (asprintf(&cbuf, "[%s]:%s", chbuf, cpbuf) < 0) {
return NULL;
}
free(chbuf);
free(cpbuf);
}
if (spec->sni_port) {
if (asprintf(&cbuf, "sni %i", spec->sni_port) < 0) {
return NULL;
}
}
if (asprintf(&s, "[%s]:%s %s%s%s %s", lhbuf, lpbuf,
(spec->ssl ? "ssl" : "tcp"),
(spec->upgrade ? "|upgrade" : ""),
(spec->http ? "|http" : ""),
(spec->natengine ? spec->natengine : cbuf)) < 0) {
s = NULL;
}
free(lhbuf);
free(lpbuf);
if (cbuf)
free(cbuf);
return s;
}
void
opts_set_cacrt(opts_t *opts, const char *argv0, const char *optarg)
{
if (opts->cacrt)
X509_free(opts->cacrt);
opts->cacrt = ssl_x509_load(optarg);
if (!opts->cacrt) {
fprintf(stderr, "%s: error loading CA cert from '%s':\n",
argv0, optarg);
if (errno) {
fprintf(stderr, "%s\n", strerror(errno));
} else {
ERR_print_errors_fp(stderr);
}
exit(EXIT_FAILURE);
}
ssl_x509_refcount_inc(opts->cacrt);
sk_X509_insert(opts->cachain, opts->cacrt, 0);
if (!opts->cakey) {
opts->cakey = ssl_key_load(optarg);
}
#ifndef OPENSSL_NO_DH
if (!opts->dh) {
opts->dh = ssl_dh_load(optarg);
}
#endif /* !OPENSSL_NO_DH */
#ifdef DEBUG_OPTS
log_dbg_printf("CACert: %s\n", optarg);
#endif /* DEBUG_OPTS */
}
void
opts_set_cakey(opts_t *opts, const char *argv0, const char *optarg)
{
if (opts->cakey)
EVP_PKEY_free(opts->cakey);
opts->cakey = ssl_key_load(optarg);
if (!opts->cakey) {
fprintf(stderr, "%s: error loading CA key from '%s':\n",
argv0, optarg);
if (errno) {
fprintf(stderr, "%s\n", strerror(errno));
} else {
ERR_print_errors_fp(stderr);
}
exit(EXIT_FAILURE);
}
if (!opts->cacrt) {
opts->cacrt = ssl_x509_load(optarg);
if (opts->cacrt) {
ssl_x509_refcount_inc(opts->cacrt);
sk_X509_insert(opts->cachain, opts->cacrt, 0);
}
}
#ifndef OPENSSL_NO_DH
if (!opts->dh) {
opts->dh = ssl_dh_load(optarg);
}
#endif /* !OPENSSL_NO_DH */
#ifdef DEBUG_OPTS
log_dbg_printf("CAKey: %s\n", optarg);
#endif /* DEBUG_OPTS */
}
void
opts_set_cachain(opts_t *opts, const char *argv0, const char *optarg)
{
if (ssl_x509chain_load(NULL, &opts->cachain, optarg) == -1) {
fprintf(stderr, "%s: error loading CA chain from '%s':\n",
argv0, optarg);
if (errno) {
fprintf(stderr, "%s\n", strerror(errno));
} else {
ERR_print_errors_fp(stderr);
}
exit(EXIT_FAILURE);
}
#ifdef DEBUG_OPTS
log_dbg_printf("CAChain: %s\n", optarg);
#endif /* DEBUG_OPTS */
}
void
opts_set_leafkey(opts_t *opts, const char *argv0, const char *optarg)
{
if (opts->leafkey)
EVP_PKEY_free(opts->leafkey);
opts->leafkey = ssl_key_load(optarg);
if (!opts->leafkey) {
fprintf(stderr, "%s: error loading leaf key from '%s':\n",
argv0, optarg);
if (errno) {
fprintf(stderr, "%s\n", strerror(errno));
} else {
ERR_print_errors_fp(stderr);
}
exit(EXIT_FAILURE);
}
#ifndef OPENSSL_NO_DH
if (!opts->dh) {
opts->dh = ssl_dh_load(optarg);
}
#endif /* !OPENSSL_NO_DH */
#ifdef DEBUG_OPTS
log_dbg_printf("LeafKey: %s\n", optarg);
#endif /* DEBUG_OPTS */
}
void
opts_set_leafcrlurl(opts_t *opts, const char *optarg)
{
if (opts->leafcrlurl)
free(opts->leafcrlurl);
opts->leafcrlurl = strdup(optarg);
#ifdef DEBUG_OPTS
log_dbg_printf("LeafCRLURL: %s\n", opts->leafcrlurl);
#endif /* DEBUG_OPTS */
}
void
opts_set_leafcertdir(opts_t *opts, const char *argv0, const char *optarg)
{
if (!sys_isdir(optarg)) {
fprintf(stderr, "%s: '%s' is not a directory\n",
argv0, optarg);
exit(EXIT_FAILURE);
}
if (opts->leafcertdir)
free(opts->leafcertdir);
opts->leafcertdir = strdup(optarg);
if (!opts->leafcertdir)
oom_die(argv0);
#ifdef DEBUG_OPTS
log_dbg_printf("LeafCertDir: %s\n", opts->leafcertdir);
#endif /* DEBUG_OPTS */
}
void
opts_set_defaultleafcert(opts_t *opts, const char *argv0, const char *optarg)
{
if (opts->defaultleafcert)
cert_free(opts->defaultleafcert);
opts->defaultleafcert = opts_load_cert_chain_key(optarg);
if (!opts->defaultleafcert) {
fprintf(stderr, "%s: error loading default leaf cert/chain/key"
" from '%s':\n", argv0, optarg);
if (errno) {
fprintf(stderr, "%s\n", strerror(errno));
} else {
ERR_print_errors_fp(stderr);
}
exit(EXIT_FAILURE);
}
#ifdef DEBUG_OPTS
log_dbg_printf("DefaultLeafCert: %s\n", optarg);
#endif /* DEBUG_OPTS */
}
static void
set_certgendir(opts_t *opts, const char *argv0, const char *optarg)
{
if (opts->certgendir)
free(opts->certgendir);
opts->certgendir = strdup(optarg);
if (!opts->certgendir)
oom_die(argv0);
}
void
opts_set_certgendir_writegencerts(opts_t *opts, const char *argv0,
const char *optarg)
{
opts->certgen_writeall = 0;
set_certgendir(opts, argv0, optarg);
#ifdef DEBUG_OPTS
log_dbg_printf("WriteGenCertsDir: certgendir=%s, writeall=%u\n",
opts->certgendir, opts->certgen_writeall);
#endif /* DEBUG_OPTS */
}
void
opts_set_certgendir_writeall(opts_t *opts, const char *argv0,
const char *optarg)
{
opts->certgen_writeall = 1;
set_certgendir(opts, argv0, optarg);
#ifdef DEBUG_OPTS
log_dbg_printf("WriteAllCertsDir: certgendir=%s, writeall=%u\n",
opts->certgendir, opts->certgen_writeall);
#endif /* DEBUG_OPTS */
}
void
opts_set_deny_ocsp(opts_t *opts)
{
opts->deny_ocsp = 1;
}
void
opts_unset_deny_ocsp(opts_t *opts)
{
opts->deny_ocsp = 0;
}
void
opts_set_passthrough(opts_t *opts)
{
opts->passthrough = 1;
}
void
opts_unset_passthrough(opts_t *opts)
{
opts->passthrough = 0;
}
void
opts_set_clientcrt(opts_t *opts, const char *argv0, const char *optarg)
{
if (opts->clientcrt)
X509_free(opts->clientcrt);
opts->clientcrt = ssl_x509_load(optarg);
if (!opts->clientcrt) {
fprintf(stderr, "%s: error loading client cert from '%s':\n",
argv0, optarg);
if (errno) {
fprintf(stderr, "%s\n", strerror(errno));
} else {
ERR_print_errors_fp(stderr);
}
exit(EXIT_FAILURE);
}
#ifdef DEBUG_OPTS
log_dbg_printf("ClientCert: %s\n", optarg);
#endif /* DEBUG_OPTS */
}
void
opts_set_clientkey(opts_t *opts, const char *argv0, const char *optarg)
{
if (opts->clientkey)
EVP_PKEY_free(opts->clientkey);
opts->clientkey = ssl_key_load(optarg);
if (!opts->clientkey) {
fprintf(stderr, "%s: error loading client key from '%s':\n",
argv0, optarg);
if (errno) {
fprintf(stderr, "%s\n", strerror(errno));
} else {
ERR_print_errors_fp(stderr);
}
exit(EXIT_FAILURE);
}
#ifdef DEBUG_OPTS
log_dbg_printf("ClientKey: %s\n", optarg);
#endif /* DEBUG_OPTS */
}
#ifndef OPENSSL_NO_DH
void
opts_set_dh(opts_t *opts, const char *argv0, const char *optarg)
{
if (opts->dh)
DH_free(opts->dh);
opts->dh = ssl_dh_load(optarg);
if (!opts->dh) {
fprintf(stderr, "%s: error loading DH params from '%s':\n",
argv0, optarg);
if (errno) {
fprintf(stderr, "%s\n", strerror(errno));
} else {
ERR_print_errors_fp(stderr);
}
exit(EXIT_FAILURE);
}
#ifdef DEBUG_OPTS
log_dbg_printf("DHGroupParams: %s\n", optarg);
#endif /* DEBUG_OPTS */
}
#endif /* !OPENSSL_NO_DH */
#ifndef OPENSSL_NO_ECDH
void
opts_set_ecdhcurve(opts_t *opts, const char *argv0, const char *optarg)
{
EC_KEY *ec;
if (opts->ecdhcurve)
free(opts->ecdhcurve);
if (!(ec = ssl_ec_by_name(optarg))) {
fprintf(stderr, "%s: unknown curve '%s'\n", argv0, optarg);
exit(EXIT_FAILURE);
}
EC_KEY_free(ec);
opts->ecdhcurve = strdup(optarg);
if (!opts->ecdhcurve)
oom_die(argv0);
#ifdef DEBUG_OPTS
log_dbg_printf("ECDHCurve: %s\n", opts->ecdhcurve);
#endif /* DEBUG_OPTS */
}
#endif /* !OPENSSL_NO_ECDH */
void
opts_set_sslcomp(opts_t *opts)
{
opts->sslcomp = 1;
}
void
opts_unset_sslcomp(opts_t *opts)
{
opts->sslcomp = 0;
}
void
opts_set_ciphers(opts_t *opts, const char *argv0, const char *optarg)
{
if (opts->ciphers)
free(opts->ciphers);
opts->ciphers = strdup(optarg);
if (!opts->ciphers)
oom_die(argv0);
#ifdef DEBUG_OPTS
log_dbg_printf("Ciphers: %s\n", opts->ciphers);
#endif /* DEBUG_OPTS */
}
#ifndef OPENSSL_NO_ENGINE
void
opts_set_openssl_engine(opts_t *opts, const char *argv0, const char *optarg)
{
if (opts->openssl_engine)
free(opts->openssl_engine);
opts->openssl_engine = strdup(optarg);
if (!opts->openssl_engine)
oom_die(argv0);
#ifdef DEBUG_OPTS
log_dbg_printf("OpenSSLEngine: %s\n", opts->openssl_engine);
#endif /* DEBUG_OPTS */
}
#endif /* !OPENSSL_NO_ENGINE */
/*
* Parse SSL proto string in optarg and look up the corresponding SSL method.
* Calls exit() on failure.
*/
void
opts_force_proto(opts_t *opts, const char *argv0, const char *optarg)
{
#if (OPENSSL_VERSION_NUMBER < 0x10100000L) || defined(LIBRESSL_VERSION_NUMBER)
if (opts->sslmethod != SSLv23_method) {
#else /* OPENSSL_VERSION_NUMBER >= 0x10100000L */
if (opts->sslversion) {
#endif /* OPENSSL_VERSION_NUMBER >= 0x10100000L */
fprintf(stderr, "%s: cannot use -r multiple times\n", argv0);
exit(EXIT_FAILURE);
}
#if (OPENSSL_VERSION_NUMBER < 0x10100000L) || defined(LIBRESSL_VERSION_NUMBER)
#ifdef HAVE_SSLV2
if (!strcmp(optarg, "ssl2")) {
opts->sslmethod = SSLv2_method;
} else
#endif /* HAVE_SSLV2 */
#ifdef HAVE_SSLV3
if (!strcmp(optarg, "ssl3")) {
opts->sslmethod = SSLv3_method;
} else
#endif /* HAVE_SSLV3 */
#ifdef HAVE_TLSV10
if (!strcmp(optarg, "tls10") || !strcmp(optarg, "tls1")) {
opts->sslmethod = TLSv1_method;
} else
#endif /* HAVE_TLSV10 */
#ifdef HAVE_TLSV11
if (!strcmp(optarg, "tls11")) {
opts->sslmethod = TLSv1_1_method;
} else
#endif /* HAVE_TLSV11 */
#ifdef HAVE_TLSV12
if (!strcmp(optarg, "tls12")) {
opts->sslmethod = TLSv1_2_method;
} else
#endif /* HAVE_TLSV12 */
#else /* OPENSSL_VERSION_NUMBER >= 0x10100000L */
/*
* Support for SSLv2 and the corresponding SSLv2_method(),
* SSLv2_server_method() and SSLv2_client_method() functions were
* removed in OpenSSL 1.1.0.
*/
#ifdef HAVE_SSLV3
if (!strcmp(optarg, "ssl3")) {
opts->sslversion = SSL3_VERSION;
} else
#endif /* HAVE_SSLV3 */
#ifdef HAVE_TLSV10
if (!strcmp(optarg, "tls10") || !strcmp(optarg, "tls1")) {
opts->sslversion = TLS1_VERSION;
} else
#endif /* HAVE_TLSV10 */
#ifdef HAVE_TLSV11
if (!strcmp(optarg, "tls11")) {
opts->sslversion = TLS1_1_VERSION;
} else
#endif /* HAVE_TLSV11 */
#ifdef HAVE_TLSV12
if (!strcmp(optarg, "tls12")) {
opts->sslversion = TLS1_2_VERSION;
} else
#endif /* HAVE_TLSV12 */
#endif /* OPENSSL_VERSION_NUMBER >= 0x10100000L */
{
fprintf(stderr, "%s: Unsupported SSL/TLS protocol '%s'\n",
argv0, optarg);
exit(EXIT_FAILURE);
}
#ifdef DEBUG_OPTS
log_dbg_printf("ForceSSLProto: %s\n", optarg);
#endif /* DEBUG_OPTS */
}
/*
* Parse SSL proto string in optarg and set the corresponding no_foo bit.
* Calls exit() on failure.
*/
void
opts_disable_proto(opts_t *opts, const char *argv0, const char *optarg)
{
#ifdef HAVE_SSLV2
if (!strcmp(optarg, "ssl2")) {
opts->no_ssl2 = 1;
} else
#endif /* HAVE_SSLV2 */
#ifdef HAVE_SSLV3
if (!strcmp(optarg, "ssl3")) {
opts->no_ssl3 = 1;
} else
#endif /* HAVE_SSLV3 */
#ifdef HAVE_TLSV10
if (!strcmp(optarg, "tls10") || !strcmp(optarg, "tls1")) {
opts->no_tls10 = 1;
} else
#endif /* HAVE_TLSV10 */
#ifdef HAVE_TLSV11
if (!strcmp(optarg, "tls11")) {
opts->no_tls11 = 1;
} else
#endif /* HAVE_TLSV11 */
#ifdef HAVE_TLSV12
if (!strcmp(optarg, "tls12")) {
opts->no_tls12 = 1;
} else
#endif /* HAVE_TLSV12 */
{
fprintf(stderr, "%s: Unsupported SSL/TLS protocol '%s'\n",
argv0, optarg);
exit(EXIT_FAILURE);
}
#ifdef DEBUG_OPTS
log_dbg_printf("DisableSSLProto: %s\n", optarg);
#endif /* DEBUG_OPTS */
}
void
opts_set_user(opts_t *opts, const char *argv0, const char *optarg)
{
if (!sys_isuser(optarg)) {
fprintf(stderr, "%s: '%s' is not an existing user\n",
argv0, optarg);
exit(EXIT_FAILURE);
}
if (opts->dropuser)
free(opts->dropuser);
opts->dropuser = strdup(optarg);
if (!opts->dropuser)
oom_die(argv0);
#ifdef DEBUG_OPTS
log_dbg_printf("User: %s\n", opts->dropuser);
#endif /* DEBUG_OPTS */
}
void
opts_set_group(opts_t *opts, const char *argv0, const char *optarg)
{
if (!sys_isgroup(optarg)) {
fprintf(stderr, "%s: '%s' is not an existing group\n",
argv0, optarg);
exit(EXIT_FAILURE);
}
if (opts->dropgroup)
free(opts->dropgroup);
opts->dropgroup = strdup(optarg);
if (!opts->dropgroup)
oom_die(argv0);
#ifdef DEBUG_OPTS
log_dbg_printf("Group: %s\n", opts->dropgroup);
#endif /* DEBUG_OPTS */
}