002
2021-12-29
op
* Copyright (c) 2021 Omar Polo <op@omarpolo.com>
004
2021-12-29
op
* Permission to use, copy, modify, and distribute this software for any
005
2021-12-29
op
* purpose with or without fee is hereby granted, provided that the above
006
2021-12-29
op
* copyright notice and this permission notice appear in all copies.
008
2021-12-29
op
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
009
2021-12-29
op
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
010
2021-12-29
op
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
011
2021-12-29
op
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
012
2021-12-29
op
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
013
2021-12-29
op
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
014
2021-12-29
op
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
017
2021-12-29
op
#include "gmid.h"
019
2021-12-29
op
#include <sys/socket.h>
021
2021-12-29
op
#include <assert.h>
022
2021-12-29
op
#include <ctype.h>
023
2021-12-29
op
#include <errno.h>
024
2021-12-29
op
#include <string.h>
026
2021-12-29
op
enum debug {
027
2021-12-29
op
DEBUG_NONE,
028
2021-12-29
op
DEBUG_CODE,
029
2021-12-29
op
DEBUG_HEADER,
030
2021-12-29
op
DEBUG_META,
031
2022-01-27
op
DEBUG_ALL,
034
2021-12-29
op
/* flags */
035
2021-12-29
op
int debug;
036
2021-12-29
op
int dont_verify_name;
037
2021-12-29
op
int flag2;
038
2021-12-29
op
int flag3;
040
2021-12-29
op
int redirects = 5;
041
2021-12-29
op
int timer;
042
2021-12-29
op
const char *cert;
043
2021-12-29
op
const char *key;
044
2021-12-29
op
const char *proxy_host;
045
2021-12-29
op
const char *proxy_port;
046
2021-12-29
op
const char *sni;
048
2021-12-29
op
/* state */
049
2021-12-29
op
struct tls_config *tls_conf;
051
2021-12-29
op
static void
052
2021-12-29
op
timeout(int signo)
054
2021-12-29
op
dprintf(2, "%s: timer expired\n", getprogname());
058
2021-12-29
op
static void
059
2021-12-29
op
load_tls_conf(void)
061
2021-12-29
op
if ((tls_conf = tls_config_new()) == NULL)
062
2021-12-29
op
err(1, "tls_config_new");
064
2021-12-29
op
tls_config_insecure_noverifycert(tls_conf);
065
2021-12-29
op
if (dont_verify_name)
066
2021-12-29
op
tls_config_insecure_noverifyname(tls_conf);
068
2021-12-29
op
if (flag2 &&
069
2021-12-29
op
tls_config_set_protocols(tls_conf, TLS_PROTOCOL_TLSv1_2) == -1)
070
2021-12-29
op
errx(1, "can't set TLSv1.2");
071
2021-12-29
op
if (flag3 &&
072
2021-12-29
op
tls_config_set_protocols(tls_conf, TLS_PROTOCOL_TLSv1_3) == -1)
073
2021-12-29
op
errx(1, "can't set TLSv1.3");
075
2021-12-29
op
if (cert != NULL &&
076
2021-12-29
op
tls_config_set_keypair_file(tls_conf, cert, key) == -1)
077
2021-12-29
op
errx(1, "can't load client certificate %s", cert);
080
2021-12-29
op
static void
081
2021-12-29
op
connectto(struct tls *ctx, const char *host, const char *port)
083
2021-12-29
op
struct addrinfo hints, *res, *res0;
084
2021-12-29
op
int error;
085
2021-12-29
op
int saved_errno;
087
2021-12-29
op
const char *cause = NULL;
088
2021-12-29
op
const char *sname;
090
2021-12-29
op
if (proxy_host != NULL) {
091
2021-12-29
op
host = proxy_host;
092
2021-12-29
op
port = proxy_port;
095
2021-12-29
op
if ((sname = sni) == NULL)
096
2021-12-29
op
sname = host;
098
2021-12-29
op
memset(&hints, 0, sizeof(hints));
099
2021-12-29
op
hints.ai_family = AF_UNSPEC;
100
2021-12-29
op
hints.ai_socktype = SOCK_STREAM;
101
2021-12-29
op
error = getaddrinfo(host, port, &hints, &res0);
102
2021-12-29
op
if (error)
103
2021-12-29
op
errx(1, "%s", gai_strerror(error));
106
2021-12-29
op
for (res = res0; res != NULL; res = res->ai_next) {
107
2021-12-29
op
s = socket(res->ai_family, res->ai_socktype,
108
2021-12-29
op
res->ai_protocol);
109
2021-12-29
op
if (s == -1) {
110
2021-12-29
op
cause = "socket";
111
2021-12-29
op
continue;
114
2021-12-29
op
if (connect(s, res->ai_addr, res->ai_addrlen) == -1) {
115
2021-12-29
op
cause = "connect";
116
2021-12-29
op
saved_errno = errno;
117
2021-12-29
op
close(s);
118
2021-12-29
op
errno = saved_errno;
120
2021-12-29
op
continue;
126
2021-12-29
op
if (s == -1)
127
2021-12-29
op
err(1, "%s: can't connect to %s:%s", cause,
128
2021-12-29
op
host, port);
130
2021-12-29
op
freeaddrinfo(res0);
132
2021-12-29
op
if (tls_connect_socket(ctx, s, sname) == -1)
133
2021-12-29
op
errx(1, "tls_connect_socket: %s", tls_error(ctx));
136
2021-12-29
op
static void
137
2021-12-29
op
doreq(struct tls *ctx, const char *buf)
139
2021-12-29
op
size_t s;
140
2021-12-29
op
ssize_t w;
142
2021-12-29
op
s = strlen(buf);
143
2021-12-29
op
while (s != 0) {
144
2021-12-29
op
switch (w = tls_write(ctx, buf, s)) {
147
2021-12-29
op
errx(1, "tls_write: %s", tls_error(ctx));
148
2021-12-29
op
case TLS_WANT_POLLIN:
149
2021-12-29
op
case TLS_WANT_POLLOUT:
150
2021-12-29
op
continue;
154
2021-12-29
op
buf += w;
158
2021-12-29
op
static size_t
159
2021-12-29
op
dorep(struct tls *ctx, void *buf, size_t len)
161
2021-12-29
op
ssize_t w;
162
2021-12-29
op
size_t tot = 0;
164
2021-12-29
op
while (len != 0) {
165
2021-12-29
op
switch (w = tls_read(ctx, buf, len)) {
167
2021-12-29
op
return tot;
169
2021-12-29
op
errx(1, "tls_write: %s", tls_error(ctx));
170
2021-12-29
op
case TLS_WANT_POLLIN:
171
2021-12-29
op
case TLS_WANT_POLLOUT:
172
2021-12-29
op
continue;
175
2021-12-29
op
len -= w;
176
2021-12-29
op
buf += w;
177
2021-12-29
op
tot += w;
180
2021-12-29
op
return tot;
183
2021-12-29
op
static int
184
2021-12-29
op
get(const char *r)
186
2021-12-29
op
struct tls *ctx;
187
2021-12-29
op
struct iri iri;
188
2021-12-29
op
int foundhdr = 0, code = -1, od;
189
2021-12-29
op
char iribuf[GEMINI_URL_LEN];
190
2021-12-29
op
char req[GEMINI_URL_LEN];
191
2021-12-29
op
char buf[2048];
192
2021-12-29
op
const char *parse_err, *host, *port;
194
2021-12-29
op
if (strlcpy(iribuf, r, sizeof(iribuf)) >= sizeof(iribuf))
195
2021-12-29
op
errx(1, "iri too long: %s", r);
197
2021-12-29
op
if (strlcpy(req, r, sizeof(req)) >= sizeof(req))
198
2021-12-29
op
errx(1, "iri too long: %s", r);
200
2021-12-29
op
if (strlcat(req, "\r\n", sizeof(req)) >= sizeof(req))
201
2021-12-29
op
errx(1, "iri too long: %s", r);
203
2021-12-29
op
if (!parse_iri(iribuf, &iri, &parse_err))
204
2021-12-29
op
errx(1, "invalid IRI: %s", parse_err);
207
2021-12-29
op
errx(0, "IRI OK");
209
2021-12-29
op
if ((ctx = tls_client()) == NULL)
210
2021-12-29
op
errx(1, "can't create tls context");
212
2021-12-29
op
if (tls_configure(ctx, tls_conf) == -1)
213
2021-12-29
op
errx(1, "tls_configure: %s", tls_error(ctx));
215
2021-12-29
op
host = iri.host;
216
2021-12-29
op
port = "1965";
217
2021-12-29
op
if (*iri.port != '\0')
218
2021-12-29
op
port = iri.port;
220
2021-12-29
op
connectto(ctx, host, port);
223
2021-12-29
op
while (!od) {
224
2021-12-29
op
switch (tls_handshake(ctx)) {
229
2021-12-29
op
errx(1, "handshake: %s", tls_error(ctx));
233
2021-12-29
op
doreq(ctx, req);
235
2021-12-29
op
for (;;) {
237
2021-12-29
op
size_t len;
239
2021-12-29
op
len = dorep(ctx, buf, sizeof(buf));
240
2021-12-29
op
if (len == 0)
241
2021-12-29
op
goto close;
243
2021-12-29
op
if (foundhdr) {
244
2021-12-29
op
write(1, buf, len);
245
2021-12-29
op
continue;
247
2021-12-29
op
foundhdr = 1;
249
2021-12-29
op
if (memmem(buf, len, "\r\n", 2) == NULL)
250
2021-12-29
op
errx(1, "invalid reply: no \\r\\n");
251
2021-12-29
op
if (!isdigit(buf[0]) || !isdigit(buf[1]) || buf[2] != ' ')
252
2021-12-29
op
errx(1, "invalid reply: invalid response format");
254
2021-12-29
op
code = (buf[0] - '0') * 10 + buf[1] - '0';
256
2021-12-29
op
if (debug == DEBUG_CODE) {
257
2021-12-29
op
printf("%d\n", code);
258
2021-12-29
op
goto close;
261
2021-12-29
op
if (debug == DEBUG_HEADER) {
262
2021-12-29
op
t = memmem(buf, len, "\r\n", 2);
263
2021-12-29
op
assert(t != NULL);
264
2021-12-29
op
*t = '\0';
265
2021-12-29
op
printf("%s\n", buf);
266
2021-12-29
op
goto close;
269
2021-12-29
op
if (debug == DEBUG_META) {
270
2021-12-29
op
t = memmem(buf, len, "\r\n", 2);
271
2021-12-29
op
assert(t != NULL);
272
2021-12-29
op
*t = '\0';
273
2021-12-29
op
printf("%s\n", buf+3);
274
2021-12-29
op
goto close;
277
2022-01-27
op
if (debug == DEBUG_ALL) {
278
2021-12-29
op
write(1, buf, len);
279
2021-12-29
op
continue;
282
2021-12-29
op
/* skip the header */
283
2021-12-29
op
t = memmem(buf, len, "\r\n", 2);
284
2021-12-29
op
assert(t != NULL);
285
2021-12-29
op
t += 2; /* skip \r\n */
286
2021-12-29
op
len -= t - buf;
287
2021-12-29
op
write(1, t, len);
291
2021-12-29
op
od = tls_close(ctx);
292
2021-12-29
op
if (od == TLS_WANT_POLLIN || od == TLS_WANT_POLLOUT)
293
2021-12-29
op
goto close;
295
2021-12-29
op
tls_close(ctx);
296
2021-12-29
op
tls_free(ctx);
297
2021-12-29
op
return code;
300
2021-12-29
op
static void __attribute__((noreturn))
301
2021-12-29
op
usage(void)
303
2022-09-10
op
fprintf(stderr, "version: " GG_STRING "\n");
304
2022-10-30
op
fprintf(stderr, "usage: %s [-23Nn] [-C cert] [-d mode] [-H sni] "
305
2022-01-13
op
"[-K key] [-P host[:port]]\n",
306
2021-12-29
op
getprogname());
307
2021-12-29
op
fprintf(stderr, " [-T seconds] gemini://...\n");
311
2021-12-29
op
static int
312
2021-12-29
op
parse_debug(const char *arg)
314
2021-12-29
op
if (!strcmp(arg, "none"))
315
2021-12-29
op
return DEBUG_NONE;
316
2021-12-29
op
if (!strcmp(arg, "code"))
317
2021-12-29
op
return DEBUG_CODE;
318
2021-12-29
op
if (!strcmp(arg, "header"))
319
2021-12-29
op
return DEBUG_HEADER;
320
2021-12-29
op
if (!strcmp(arg, "meta"))
321
2021-12-29
op
return DEBUG_META;
322
2022-01-27
op
if (!strcmp(arg, "all"))
323
2022-01-27
op
return DEBUG_ALL;
327
2021-12-29
op
static void
328
2021-12-29
op
parse_proxy(const char *arg)
330
2021-12-29
op
char *at;
332
2021-12-29
op
if ((proxy_host = strdup(arg)) == NULL)
333
2021-12-29
op
err(1, "strdup");
335
2021-12-29
op
proxy_port = "1965";
337
2021-12-29
op
if ((at = strchr(proxy_host, ':')) == NULL)
339
2021-12-29
op
*at = '\0';
340
2021-12-29
op
proxy_port = ++at;
342
2021-12-29
op
if (strchr(proxy_port, ':') != NULL)
343
2021-12-29
op
errx(1, "invalid port %s", proxy_port);
347
2021-12-29
op
main(int argc, char **argv)
349
2021-12-29
op
int ch, code;
350
2021-12-29
op
const char *errstr;
352
2022-10-30
op
while ((ch = getopt(argc, argv, "23C:d:H:K:NP:T:")) != -1) {
353
2021-12-29
op
switch (ch) {
354
2021-12-29
op
case '2':
355
2021-12-29
op
flag2 = 1;
357
2021-12-29
op
case '3':
358
2021-12-29
op
flag3 = 1;
360
2021-12-29
op
case 'C':
361
2021-12-29
op
cert = optarg;
363
2021-12-29
op
case 'd':
364
2021-12-29
op
debug = parse_debug(optarg);
366
2021-12-29
op
case 'H':
367
2021-12-29
op
sni = optarg;
369
2021-12-29
op
case 'K':
370
2021-12-29
op
key = optarg;
372
2021-12-29
op
case 'N':
373
2021-12-29
op
dont_verify_name = 1;
375
2021-12-29
op
case 'n':
378
2021-12-29
op
case 'P':
379
2021-12-29
op
parse_proxy(optarg);
380
2021-12-29
op
dont_verify_name = 1;
382
2021-12-29
op
case 'T':
383
2021-12-29
op
timer = strtonum(optarg, 1, 1000, &errstr);
384
2021-12-29
op
if (errstr != NULL)
385
2021-12-29
op
errx(1, "timeout is %s: %s",
386
2021-12-29
op
errstr, optarg);
387
2021-12-29
op
signal(SIGALRM, timeout);
388
2021-12-29
op
alarm(timer);
394
2021-12-29
op
argc -= optind;
395
2021-12-29
op
argv += optind;
397
2021-12-29
op
if (flag2 + flag3 > 1) {
398
2021-12-29
op
warnx("only -2 or -3 can be specified at the same time");
402
2021-12-29
op
if ((cert != NULL && key == NULL) ||
403
2021-12-29
op
(cert == NULL && key != NULL)) {
404
2021-12-29
op
warnx("cert or key is missing");
408
2022-01-13
op
if (argc != 1)
411
2021-12-29
op
load_tls_conf();
413
2022-01-13
op
signal(SIGPIPE, SIG_IGN);
415
2021-12-29
op
#ifdef __OpenBSD__
416
2021-12-29
op
if (pledge("stdio inet dns", NULL) == -1)
417
2021-12-29
op
err(1, "pledge");
420
2021-12-29
op
code = get(*argv);
422
2021-12-29
op
return code < 20 || code >= 30;
