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BearSSL/tools/twrch.c

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/*
* Copyright (c) 2017 Thomas Pornin <pornin@bolet.org>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <errno.h>
#ifdef _WIN32
#include <windows.h>
#else
#include <signal.h>
#include <sys/types.h>
#include <unistd.h>
#endif
#include "brssl.h"
static int verbose = 0;
static void
usage_twrch(void)
{
fprintf(stderr,
"usage: brssl twrch [ options ]\n");
fprintf(stderr,
"options:\n");
fprintf(stderr,
" -trace dump all packets on stderr\n");
fprintf(stderr,
" -v verbose error messages on stderr\n");
fprintf(stderr,
" -server act as an SSL server\n");
fprintf(stderr,
" -client act as an SSL client\n");
fprintf(stderr,
" -sni name use specified name for SNI\n");
fprintf(stderr,
" -mono use monodirectional buffering\n");
fprintf(stderr,
" -buf length set the I/O buffer length (in bytes)\n");
fprintf(stderr,
" -cache length set the session cache storage length (in bytes)\n");
fprintf(stderr,
" -cert fname read certificate chain from file 'fname'\n");
fprintf(stderr,
" -key fname read private key from file 'fname'\n");
fprintf(stderr,
" -CA file add trust anchors from 'file' (for peer auth)\n");
fprintf(stderr,
" -anon_ok request but do not require a client certificate\n");
fprintf(stderr,
" -nostaticecdh prohibit full-static ECDH (client only)\n");
fprintf(stderr,
" -list list supported names (protocols, algorithms...)\n");
fprintf(stderr,
" -vmin name set minimum supported version (default: TLS-1.0)\n");
fprintf(stderr,
" -vmax name set maximum supported version (default: TLS-1.2)\n");
fprintf(stderr,
" -cs names set list of supported cipher suites (comma-separated)\n");
fprintf(stderr,
" -hf names add support for some hash functions (comma-separated)\n");
fprintf(stderr,
" -minhello len set minimum ClientHello length (in bytes)\n");
fprintf(stderr,
" -serverpref enforce server's preferences for cipher suites\n");
fprintf(stderr,
" -noreneg prohibit renegotiations\n");
fprintf(stderr,
" -alpn name add protocol name to list of protocols (ALPN extension)\n");
fprintf(stderr,
" -strictalpn fail on ALPN mismatch\n");
}
static void
free_alpn(void *alpn)
{
xfree(*(char **)alpn);
}
static void
dump_blob(const char *name, const void *data, size_t len)
{
const unsigned char *buf;
size_t u;
buf = data;
fprintf(stderr, "%s (len = %lu)", name, (unsigned long)len);
for (u = 0; u < len; u ++) {
if ((u & 15) == 0) {
fprintf(stderr, "\n%08lX ", (unsigned long)u);
} else if ((u & 7) == 0) {
fprintf(stderr, " ");
}
fprintf(stderr, " %02x", buf[u]);
}
fprintf(stderr, "\n");
}
/*
* Callback for reading bytes from standard input.
*/
static int
stdin_read(void *ctx, unsigned char *buf, size_t len)
{
for (;;) {
#ifdef _WIN32
DWORD rlen;
#else
ssize_t rlen;
#endif
int eof;
#ifdef _WIN32
eof = !ReadFile(GetStdHandle(STD_INPUT_HANDLE),
buf, len, &rlen, NULL) || rlen == 0;
#else
rlen = read(0, buf, len);
if (rlen <= 0) {
if (rlen < 0 && errno == EINTR) {
continue;
}
eof = 1;
} else {
eof = 0;
}
#endif
if (eof) {
if (*(int *)ctx) {
if (verbose) {
fprintf(stderr, "recv: EOF\n");
}
}
return -1;
}
if (*(int *)ctx) {
dump_blob("recv", buf, (size_t)rlen);
}
return (int)rlen;
}
}
/*
* Callback for writing bytes on standard output.
*/
static int
stdout_write(void *ctx, const unsigned char *buf, size_t len)
{
for (;;) {
#ifdef _WIN32
DWORD wlen;
#else
ssize_t wlen;
#endif
int eof;
#ifdef _WIN32
eof = !WriteFile(GetStdHandle(STD_OUTPUT_HANDLE),
buf, len, &wlen, NULL);
#else
wlen = write(1, buf, len);
if (wlen <= 0) {
if (wlen < 0 && errno == EINTR) {
continue;
}
eof = 1;
} else {
eof = 0;
}
#endif
if (eof) {
if (*(int *)ctx) {
if (verbose) {
fprintf(stderr, "send: EOF\n");
}
}
return -1;
}
if (*(int *)ctx) {
dump_blob("send", buf, (size_t)wlen);
}
return (int)wlen;
}
}
static void
print_error(int err)
{
const char *name, *comment;
name = find_error_name(err, &comment);
if (name != NULL) {
fprintf(stderr, "ERR %d: %s\n %s\n", err, name, comment);
return;
}
if (err >= BR_ERR_RECV_FATAL_ALERT
&& err < BR_ERR_RECV_FATAL_ALERT + 256)
{
fprintf(stderr, "ERR %d: received fatal alert %d\n",
err, err - BR_ERR_RECV_FATAL_ALERT);
return;
}
if (err >= BR_ERR_SEND_FATAL_ALERT
&& err < BR_ERR_SEND_FATAL_ALERT + 256)
{
fprintf(stderr, "ERR %d: sent fatal alert %d\n",
err, err - BR_ERR_SEND_FATAL_ALERT);
return;
}
fprintf(stderr, "ERR %d: UNKNOWN\n", err);
}
/* see brssl.h */
int
do_twrch(int argc, char *argv[])
{
int retcode;
int trace;
int is_client;
int is_server;
const char *sni;
int i, bidi;
unsigned vmin, vmax;
cipher_suite *suites;
size_t num_suites;
uint16_t *suite_ids;
unsigned hfuns;
br_x509_certificate *chain;
size_t chain_len;
int cert_signer_algo;
private_key *sk;
int nostaticecdh;
anchor_list anchors = VEC_INIT;
VECTOR(char *) alpn_names = VEC_INIT;
br_x509_minimal_context xc;
x509_noanchor_context xwc;
const br_hash_class *dnhash;
size_t u;
union {
br_ssl_engine_context eng;
br_ssl_server_context srv;
br_ssl_client_context cnt;
} cc;
br_ssl_session_cache_lru lru;
unsigned char *iobuf, *cache;
size_t iobuf_len, cache_len, minhello_len;
br_sslio_context ioc;
uint32_t flags;
int reconnect;
retcode = 0;
trace = 0;
is_client = 0;
is_server = 0;
sni = NULL;
bidi = 1;
vmin = 0;
vmax = 0;
suites = NULL;
num_suites = 0;
suite_ids = NULL;
hfuns = 0;
chain = NULL;
chain_len = 0;
cert_signer_algo = 0;
sk = NULL;
nostaticecdh = 0;
iobuf = NULL;
iobuf_len = 0;
cache = NULL;
cache_len = (size_t)-1;
minhello_len = (size_t)-1;
flags = 0;
reconnect = 0;
for (i = 0; i < argc; i ++) {
const char *arg;
arg = argv[i];
if (arg[0] != '-') {
usage_twrch();
goto twrch_exit_error;
}
if (eqstr(arg, "-trace")) {
trace = 1;
} else if (eqstr(arg, "-v")) {
verbose = 1;
} else if (eqstr(arg, "-server")) {
is_server = 1;
} else if (eqstr(arg, "-client")) {
is_client = 1;
} else if (eqstr(arg, "-sni")) {
if (++ i >= argc) {
fprintf(stderr,
"ERROR: no argument for '-sni'\n");
usage_twrch();
goto twrch_exit_error;
}
arg = argv[i];
if (sni != NULL) {
fprintf(stderr, "ERROR: duplicate SNI\n");
usage_twrch();
goto twrch_exit_error;
}
sni = arg;
} else if (eqstr(arg, "-mono")) {
bidi = 0;
} else if (eqstr(arg, "-buf")) {
if (++ i >= argc) {
fprintf(stderr,
"ERROR: no argument for '-buf'\n");
usage_twrch();
goto twrch_exit_error;
}
arg = argv[i];
if (iobuf_len != 0) {
fprintf(stderr,
"ERROR: duplicate I/O buffer length\n");
usage_twrch();
goto twrch_exit_error;
}
iobuf_len = parse_size(arg);
if (iobuf_len == (size_t)-1) {
usage_twrch();
goto twrch_exit_error;
}
} else if (eqstr(arg, "-cache")) {
if (++ i >= argc) {
fprintf(stderr,
"ERROR: no argument for '-cache'\n");
usage_twrch();
goto twrch_exit_error;
}
arg = argv[i];
if (cache_len != (size_t)-1) {
fprintf(stderr, "ERROR: duplicate session"
" cache length\n");
usage_twrch();
goto twrch_exit_error;
}
cache_len = parse_size(arg);
if (cache_len == (size_t)-1) {
usage_twrch();
goto twrch_exit_error;
}
} else if (eqstr(arg, "-cert")) {
if (++ i >= argc) {
fprintf(stderr,
"ERROR: no argument for '-cert'\n");
usage_twrch();
goto twrch_exit_error;
}
if (chain != NULL) {
fprintf(stderr,
"ERROR: duplicate certificate chain\n");
usage_twrch();
goto twrch_exit_error;
}
arg = argv[i];
chain = read_certificates(arg, &chain_len);
if (chain == NULL || chain_len == 0) {
goto twrch_exit_error;
}
} else if (eqstr(arg, "-key")) {
if (++ i >= argc) {
fprintf(stderr,
"ERROR: no argument for '-key'\n");
usage_twrch();
goto twrch_exit_error;
}
if (sk != NULL) {
fprintf(stderr,
"ERROR: duplicate private key\n");
usage_twrch();
goto twrch_exit_error;
}
arg = argv[i];
sk = read_private_key(arg);
if (sk == NULL) {
goto twrch_exit_error;
}
} else if (eqstr(arg, "-CA")) {
if (++ i >= argc) {
fprintf(stderr,
"ERROR: no argument for '-CA'\n");
usage_twrch();
goto twrch_exit_error;
}
arg = argv[i];
if (read_trust_anchors(&anchors, arg) == 0) {
usage_twrch();
goto twrch_exit_error;
}
} else if (eqstr(arg, "-anon_ok")) {
flags |= BR_OPT_TOLERATE_NO_CLIENT_AUTH;
} else if (eqstr(arg, "-nostaticecdh")) {
nostaticecdh = 1;
} else if (eqstr(arg, "-list")) {
list_names();
goto twrch_exit;
} else if (eqstr(arg, "-vmin")) {
if (++ i >= argc) {
fprintf(stderr,
"ERROR: no argument for '-vmin'\n");
usage_twrch();
goto twrch_exit_error;
}
arg = argv[i];
if (vmin != 0) {
fprintf(stderr,
"ERROR: duplicate minimum version\n");
usage_twrch();
goto twrch_exit_error;
}
vmin = parse_version(arg, strlen(arg));
if (vmin == 0) {
fprintf(stderr,
"ERROR: unrecognised version '%s'\n",
arg);
usage_twrch();
goto twrch_exit_error;
}
} else if (eqstr(arg, "-vmax")) {
if (++ i >= argc) {
fprintf(stderr,
"ERROR: no argument for '-vmax'\n");
usage_twrch();
goto twrch_exit_error;
}
arg = argv[i];
if (vmax != 0) {
fprintf(stderr,
"ERROR: duplicate maximum version\n");
usage_twrch();
goto twrch_exit_error;
}
vmax = parse_version(arg, strlen(arg));
if (vmax == 0) {
fprintf(stderr,
"ERROR: unrecognised version '%s'\n",
arg);
usage_twrch();
goto twrch_exit_error;
}
} else if (eqstr(arg, "-cs")) {
if (++ i >= argc) {
fprintf(stderr,
"ERROR: no argument for '-cs'\n");
usage_twrch();
goto twrch_exit_error;
}
arg = argv[i];
if (suites != NULL) {
fprintf(stderr, "ERROR: duplicate list"
" of cipher suites\n");
usage_twrch();
goto twrch_exit_error;
}
suites = parse_suites(arg, &num_suites);
if (suites == NULL) {
usage_twrch();
goto twrch_exit_error;
}
} else if (eqstr(arg, "-hf")) {
unsigned x;
if (++ i >= argc) {
fprintf(stderr,
"ERROR: no argument for '-hf'\n");
usage_twrch();
goto twrch_exit_error;
}
arg = argv[i];
x = parse_hash_functions(arg);
if (x == 0) {
usage_twrch();
goto twrch_exit_error;
}
hfuns |= x;
} else if (eqstr(arg, "-minhello")) {
if (++ i >= argc) {
fprintf(stderr,
"ERROR: no argument for '-minhello'\n");
usage_twrch();
goto twrch_exit_error;
}
arg = argv[i];
if (minhello_len != (size_t)-1) {
fprintf(stderr, "ERROR: duplicate minimum"
" ClientHello length\n");
usage_twrch();
goto twrch_exit_error;
}
minhello_len = parse_size(arg);
/*
* Minimum ClientHello length must fit on 16 bits.
*/
if (minhello_len == (size_t)-1
|| (((minhello_len >> 12) >> 4) != 0))
{
usage_twrch();
goto twrch_exit_error;
}
} else if (eqstr(arg, "-serverpref")) {
flags |= BR_OPT_ENFORCE_SERVER_PREFERENCES;
} else if (eqstr(arg, "-noreneg")) {
flags |= BR_OPT_NO_RENEGOTIATION;
} else if (eqstr(arg, "-alpn")) {
if (++ i >= argc) {
fprintf(stderr,
"ERROR: no argument for '-alpn'\n");
usage_twrch();
goto twrch_exit_error;
}
VEC_ADD(alpn_names, xstrdup(argv[i]));
} else if (eqstr(arg, "-strictalpn")) {
flags |= BR_OPT_FAIL_ON_ALPN_MISMATCH;
} else {
fprintf(stderr, "ERROR: unknown option: '%s'\n", arg);
usage_twrch();
goto twrch_exit_error;
}
}
/*
* Verify consistency of options.
*/
if (!is_client && !is_server) {
fprintf(stderr, "ERROR:"
" one of -server and -client must be specified\n");
usage_twrch();
goto twrch_exit_error;
}
if (is_client && is_server) {
fprintf(stderr, "ERROR:"
" -server and -client may not be both specified\n");
usage_twrch();
goto twrch_exit_error;
}
if (vmin == 0) {
vmin = BR_TLS10;
}
if (vmax == 0) {
vmax = BR_TLS12;
}
if (vmax < vmin) {
fprintf(stderr, "ERROR: impossible minimum/maximum protocol"
" version combination\n");
usage_twrch();
goto twrch_exit_error;
}
if (is_server) {
if (chain == NULL) {
fprintf(stderr, "ERROR: no certificate specified"
" for server (-cert)\n");
usage_twrch();
goto twrch_exit_error;
}
if (sk == NULL) {
fprintf(stderr, "ERROR: no private key specified"
" for server (-key)\n");
usage_twrch();
goto twrch_exit_error;
}
} else {
if (chain == NULL && sk != NULL) {
fprintf(stderr, "ERROR: private key (-key)"
" but no certificate (-cert)");
usage_twrch();
goto twrch_exit_error;
}
if (chain != NULL && sk == NULL) {
fprintf(stderr, "ERROR: certificate (-cert)"
" but no private key (-key)");
usage_twrch();
goto twrch_exit_error;
}
}
if (suites == NULL) {
num_suites = 0;
for (u = 0; cipher_suites[u].name; u ++) {
if ((cipher_suites[u].req & REQ_TLS12) == 0
|| vmax >= BR_TLS12)
{
num_suites ++;
}
}
suites = xmalloc(num_suites * sizeof *suites);
num_suites = 0;
for (u = 0; cipher_suites[u].name; u ++) {
if ((cipher_suites[u].req & REQ_TLS12) == 0
|| vmax >= BR_TLS12)
{
suites[num_suites ++] = cipher_suites[u];
}
}
}
if (hfuns == 0) {
hfuns = (unsigned)-1;
}
if (sk != NULL) {
switch (sk->key_type) {
int curve;
uint32_t supp;
case BR_KEYTYPE_RSA:
break;
case BR_KEYTYPE_EC:
curve = sk->key.ec.curve;
supp = br_ec_get_default()->supported_curves;
if (curve > 31 || !((supp >> curve) & 1)) {
fprintf(stderr, "ERROR: private key curve (%d)"
" is not supported\n", curve);
goto twrch_exit_error;
}
break;
default:
fprintf(stderr, "ERROR: unsupported"
" private key type (%d)\n", sk->key_type);
goto twrch_exit_error;
}
}
if (chain != NULL) {
cert_signer_algo = get_cert_signer_algo(chain);
if (cert_signer_algo == 0) {
goto twrch_exit_error;
}
}
if (iobuf_len == 0) {
if (bidi) {
iobuf_len = BR_SSL_BUFSIZE_BIDI;
} else {
iobuf_len = BR_SSL_BUFSIZE_MONO;
}
}
iobuf = xmalloc(iobuf_len);
if (is_server) {
if (cache_len == (size_t)-1) {
cache_len = 5000;
}
cache = xmalloc(cache_len);
}
/*
* Initialise the relevant context.
*/
if (is_client) {
br_ssl_client_zero(&cc.cnt);
} else {
br_ssl_server_zero(&cc.srv);
}
/*
* Compute implementation requirements and inject implementations.
*/
suite_ids = xmalloc(num_suites * sizeof *suite_ids);
br_ssl_engine_set_versions(&cc.eng, vmin, vmax);
br_ssl_engine_set_all_flags(&cc.eng, flags);
if (vmin <= BR_TLS11) {
if (!(hfuns & (1 << br_md5_ID))) {
fprintf(stderr, "ERROR: TLS 1.0 and 1.1 need MD5\n");
goto twrch_exit_error;
}
if (!(hfuns & (1 << br_sha1_ID))) {
fprintf(stderr, "ERROR: TLS 1.0 and 1.1 need SHA-1\n");
goto twrch_exit_error;
}
}
for (u = 0; u < num_suites; u ++) {
unsigned req;
req = suites[u].req;
suite_ids[u] = suites[u].suite;
if ((req & REQ_TLS12) != 0 && vmax < BR_TLS12) {
fprintf(stderr,
"ERROR: cipher suite %s requires TLS 1.2\n",
suites[u].name);
goto twrch_exit_error;
}
if ((req & REQ_SHA1) != 0 && !(hfuns & (1 << br_sha1_ID))) {
fprintf(stderr,
"ERROR: cipher suite %s requires SHA-1\n",
suites[u].name);
goto twrch_exit_error;
}
if ((req & REQ_SHA256) != 0 && !(hfuns & (1 << br_sha256_ID))) {
fprintf(stderr,
"ERROR: cipher suite %s requires SHA-256\n",
suites[u].name);
goto twrch_exit_error;
}
if ((req & REQ_SHA384) != 0 && !(hfuns & (1 << br_sha384_ID))) {
fprintf(stderr,
"ERROR: cipher suite %s requires SHA-384\n",
suites[u].name);
goto twrch_exit_error;
}
/* TODO: algorithm implementation selection */
if ((req & REQ_AESCBC) != 0) {
br_ssl_engine_set_default_aes_cbc(&cc.eng);
}
if ((req & REQ_AESCCM) != 0) {
br_ssl_engine_set_default_aes_ccm(&cc.eng);
}
if ((req & REQ_AESGCM) != 0) {
br_ssl_engine_set_default_aes_gcm(&cc.eng);
}
if ((req & REQ_CHAPOL) != 0) {
br_ssl_engine_set_default_chapol(&cc.eng);
}
if ((req & REQ_3DESCBC) != 0) {
br_ssl_engine_set_default_des_cbc(&cc.eng);
}
if (is_client && (req & REQ_RSAKEYX) != 0) {
br_ssl_client_set_default_rsapub(&cc.cnt);
}
if (is_client && (req & REQ_ECDHE_RSA) != 0) {
br_ssl_engine_set_default_rsavrfy(&cc.eng);
}
if (is_client && (req & REQ_ECDH) != 0) {
br_ssl_engine_set_default_ec(&cc.eng);
}
if ((req & (REQ_ECDHE_RSA | REQ_ECDHE_ECDSA)) != 0) {
br_ssl_engine_set_default_ec(&cc.eng);
}
}
br_ssl_engine_set_suites(&cc.eng, suite_ids, num_suites);
dnhash = NULL;
for (u = 0; hash_functions[u].name; u ++) {
const br_hash_class *hc;
int id;
hc = hash_functions[u].hclass;
id = (hc->desc >> BR_HASHDESC_ID_OFF) & BR_HASHDESC_ID_MASK;
if ((hfuns & ((unsigned)1 << id)) != 0) {
dnhash = hc;
br_ssl_engine_set_hash(&cc.eng, id, hc);
}
}
if (vmin <= BR_TLS11) {
br_ssl_engine_set_prf10(&cc.eng, &br_tls10_prf);
}
if (vmax >= BR_TLS12) {
if ((hfuns & ((unsigned)1 << br_sha256_ID)) != 0) {
br_ssl_engine_set_prf_sha256(&cc.eng,
&br_tls12_sha256_prf);
}
if ((hfuns & ((unsigned)1 << br_sha384_ID)) != 0) {
br_ssl_engine_set_prf_sha384(&cc.eng,
&br_tls12_sha384_prf);
}
}
if (VEC_LEN(alpn_names) != 0) {
br_ssl_engine_set_protocol_names(&cc.eng,
(const char **)&VEC_ELT(alpn_names, 0),
VEC_LEN(alpn_names));
}
/*
* In server role, we use a session cache (size can be
* specified; if size is zero, then no cache is set).
*/
if (is_server && cache != NULL) {
br_ssl_session_cache_lru_init(&lru, cache, cache_len);
br_ssl_server_set_cache(&cc.srv, &lru.vtable);
}
/*
* For a server, set the policy handler.
*/
if (is_server) {
switch (sk->key_type) {
case BR_KEYTYPE_RSA:
br_ssl_server_set_single_rsa(&cc.srv,
chain, chain_len, &sk->key.rsa,
BR_KEYTYPE_KEYX | BR_KEYTYPE_SIGN,
br_rsa_private_get_default(),
br_rsa_pkcs1_sign_get_default());
break;
case BR_KEYTYPE_EC:
br_ssl_server_set_single_ec(&cc.srv,
chain, chain_len, &sk->key.ec,
BR_KEYTYPE_KEYX | BR_KEYTYPE_SIGN,
cert_signer_algo,
br_ec_get_default(),
br_ecdsa_sign_asn1_get_default());
break;
default:
fprintf(stderr, "ERROR: unsupported"
" private key type (%d)\n", sk->key_type);
goto twrch_exit_error;
}
}
/*
* For a client, if a certificate was specified, use it.
*/
if (is_client && chain != NULL) {
switch (sk->key_type) {
unsigned usages;
case BR_KEYTYPE_RSA:
br_ssl_client_set_single_rsa(&cc.cnt,
chain, chain_len, &sk->key.rsa,
br_rsa_pkcs1_sign_get_default());
break;
case BR_KEYTYPE_EC:
if (nostaticecdh) {
cert_signer_algo = 0;
usages = BR_KEYTYPE_SIGN;
} else {
usages = BR_KEYTYPE_KEYX | BR_KEYTYPE_SIGN;
}
br_ssl_client_set_single_ec(&cc.cnt,
chain, chain_len, &sk->key.ec,
usages, cert_signer_algo,
br_ec_get_default(),
br_ecdsa_sign_asn1_get_default());
break;
default:
fprintf(stderr, "ERROR: unsupported"
" private key type (%d)\n", sk->key_type);
goto twrch_exit_error;
}
}
/*
* On a client, or if trust anchors have been configured, then
* set an X.509 validation engine. If there are no trust anchors
* (client only), then a "no anchor" wrapper will be applied.
*/
if (is_client || VEC_LEN(anchors) != 0) {
br_x509_minimal_init(&xc, dnhash,
&VEC_ELT(anchors, 0), VEC_LEN(anchors));
for (u = 0; hash_functions[u].name; u ++) {
const br_hash_class *hc;
int id;
hc = hash_functions[u].hclass;
id = (hc->desc >> BR_HASHDESC_ID_OFF)
& BR_HASHDESC_ID_MASK;
if ((hfuns & ((unsigned)1 << id)) != 0) {
br_x509_minimal_set_hash(&xc, id, hc);
}
}
br_ssl_engine_set_default_rsavrfy(&cc.eng);
br_ssl_engine_set_default_ecdsa(&cc.eng);
br_x509_minimal_set_rsa(&xc, br_rsa_pkcs1_vrfy_get_default());
br_x509_minimal_set_ecdsa(&xc,
br_ec_get_default(), br_ecdsa_vrfy_asn1_get_default());
br_ssl_engine_set_x509(&cc.eng, &xc.vtable);
if (VEC_LEN(anchors) == 0) {
x509_noanchor_init(&xwc, &xc.vtable);
br_ssl_engine_set_x509(&cc.eng, &xwc.vtable);
} else {
br_ssl_engine_set_x509(&cc.eng, &xc.vtable);
}
if (is_server) {
br_ssl_server_set_trust_anchor_names_alt(&cc.srv,
&VEC_ELT(anchors, 0), VEC_LEN(anchors));
}
}
/*
* Set I/O buffer.
*/
br_ssl_engine_set_buffer(&cc.eng, iobuf, iobuf_len, bidi);
/*
* Start the engine.
*/
if (is_client) {
br_ssl_client_reset(&cc.cnt, sni, 0);
}
if (is_server) {
br_ssl_server_reset(&cc.srv);
}
/*
* On Unix systems, we want to ignore SIGPIPE: if the peer
* closes the connection abruptly, then we want to report it
* as a "normal" error (exit code = 1).
*/
#ifndef _WIN32
signal(SIGPIPE, SIG_IGN);
#endif
/*
* Initialize the callbacks for exchanging data over stdin and
* stdout.
*/
br_sslio_init(&ioc, &cc.eng, stdin_read, &trace, stdout_write, &trace);
/*
* Run the Twrch protocol.
*/
for (;;) {
br_sha1_context sc;
unsigned char hv[20], tmp[41];
uint64_t count;
int fb, i;
/*
* Read line, byte by byte, hashing it on the fly.
*/
br_sha1_init(&sc);
count = 0;
fb = 0;
for (;;) {
unsigned char x;
if (br_sslio_read(&ioc, &x, 1) < 0) {
if (count == 0 && reconnect) {
reconnect = 0;
if (br_sslio_close(&ioc) < 0) {
goto twrch_loop_finished;
}
if (is_client) {
br_ssl_client_reset(
&cc.cnt, sni, 1);
}
if (is_server) {
br_ssl_server_reset(&cc.srv);
}
br_sslio_init(&ioc, &cc.eng,
stdin_read, &trace,
stdout_write, &trace);
continue;
}
goto twrch_loop_finished;
}
if (count == 0) {
fb = x;
}
if (x == 0x0A) {
break;
}
br_sha1_update(&sc, &x, 1);
count ++;
}
if (count == 1) {
switch (fb) {
case 'C':
br_sslio_close(&ioc);
goto twrch_loop_finished;
case 'T':
if (br_sslio_close(&ioc) < 0) {
goto twrch_loop_finished;
}
if (is_client) {
br_ssl_client_reset(&cc.cnt, sni, 1);
}
if (is_server) {
br_ssl_server_reset(&cc.srv);
}
br_sslio_init(&ioc, &cc.eng,
stdin_read, &trace,
stdout_write, &trace);
continue;
case 'G':
if (!br_ssl_engine_renegotiate(&cc.eng)) {
br_sslio_write_all(&ioc, "DENIED\n", 7);
br_sslio_flush(&ioc);
} else {
br_sslio_write_all(&ioc, "OK\n", 3);
br_sslio_flush(&ioc);
}
continue;
case 'R':
reconnect = 1;
br_sslio_write_all(&ioc, "OK\n", 3);
br_sslio_flush(&ioc);
continue;
case 'U':
if (is_client) {
br_ssl_client_forget_session(&cc.cnt);
}
if (is_server && cache != NULL) {
br_ssl_session_parameters pp;
br_ssl_engine_get_session_parameters(
&cc.eng, &pp);
if (pp.session_id_len == 32) {
br_ssl_session_cache_lru_forget(
&lru, pp.session_id);
}
}
br_sslio_write_all(&ioc, "DONE\n", 5);
br_sslio_flush(&ioc);
continue;
}
}
br_sha1_out(&sc, hv);
for (i = 0; i < 20; i ++) {
int x;
x = hv[i];
tmp[(i << 1) + 0] = "0123456789abcdef"[x >> 4];
tmp[(i << 1) + 1] = "0123456789abcdef"[x & 15];
}
tmp[40] = 0x0A;
br_sslio_write_all(&ioc, tmp, 41);
br_sslio_flush(&ioc);
}
twrch_loop_finished:
if (br_ssl_engine_current_state(&cc.eng) == BR_SSL_CLOSED) {
int err;
err = br_ssl_engine_last_error(&cc.eng);
if (err == 0) {
retcode = 0;
} else {
if (verbose) {
print_error(err);
}
retcode = 1;
}
} else {
if (verbose) {
fprintf(stderr, "Engine not closed!\n");
}
retcode = 1;
}
/*
* Release allocated structures.
*/
twrch_exit:
xfree(suites);
xfree(suite_ids);
free_certificates(chain, chain_len);
free_private_key(sk);
VEC_CLEAREXT(anchors, &free_ta_contents);
VEC_CLEAREXT(alpn_names, &free_alpn);
xfree(iobuf);
xfree(cache);
return retcode;
twrch_exit_error:
retcode = -1;
goto twrch_exit;
}
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