Commit | Line | Data |
---|---|---|
03019e41 | 1 | Casey Marshall wrote: |
ce06af28 WD |
2 | |
3 | I've been hacking together a way to use rsync with OpenSSL, and have | |
4 | attached my current patch against a recent CVS tree. The details of | |
5 | this implementation are: | |
6 | ||
7 | 1. The SSL code is added as a "layer" that is forked into its own | |
8 | process. | |
9 | ||
10 | 2. An SSL connection is established by the client issuing the | |
11 | command: | |
12 | ||
13 | #starttls | |
14 | ||
37d262c5 | 15 | And, if the daemon allows SSL, it replies with |
ce06af28 WD |
16 | |
17 | @RSYNCD: starttls | |
18 | ||
19 | At which point both sides begin negotiating the SSL connection. | |
20 | Servers that can't or don't want to use SSL just treat it as a | |
21 | normal unknown command. | |
22 | ||
23 | 3. The SSL code is meant to be unobtrusive, and when this patch is | |
24 | applied the program may still be built with no SSL code. | |
25 | ||
26 | 4. There are a number of details not implemented. | |
27 | ||
28 | All warnings apply; I don't do C programming all that often, so I | |
29 | can't say if I've left any cleanup/compatibility errors in the code. | |
30 | ||
03019e41 WD |
31 | To use this patch, run these commands for a successful build: |
32 | ||
33 | patch -p1 <patches/openssl-support.diff | |
34 | ./prepare-source | |
35 | ./configure | |
36 | make | |
ce06af28 | 37 | |
cc3e685d WD |
38 | diff --git a/Makefile.in b/Makefile.in |
39 | --- a/Makefile.in | |
40 | +++ b/Makefile.in | |
41 | @@ -40,7 +40,7 @@ OBJS3=progress.o pipe.o | |
ce06af28 WD |
42 | DAEMON_OBJ = params.o loadparm.o clientserver.o access.o connection.o authenticate.o |
43 | popt_OBJS=popt/findme.o popt/popt.o popt/poptconfig.o \ | |
44 | popt/popthelp.o popt/poptparse.o | |
45 | -OBJS=$(OBJS1) $(OBJS2) $(OBJS3) $(DAEMON_OBJ) $(LIBOBJ) $(ZLIBOBJ) @BUILD_POPT@ | |
46 | +OBJS=$(OBJS1) $(OBJS2) $(OBJS3) $(DAEMON_OBJ) $(LIBOBJ) $(ZLIBOBJ) @BUILD_POPT@ @SSL_OBJS@ | |
47 | ||
58b399b9 | 48 | TLS_OBJ = tls.o syscall.o lib/compat.o lib/snprintf.o lib/permstring.o lib/sysxattrs.o @BUILD_POPT@ |
ce06af28 | 49 | |
cc3e685d WD |
50 | diff --git a/cleanup.c b/cleanup.c |
51 | --- a/cleanup.c | |
52 | +++ b/cleanup.c | |
ffc18846 | 53 | @@ -25,6 +25,9 @@ |
1898c899 WD |
54 | extern int am_server; |
55 | extern int am_daemon; | |
8a529471 | 56 | extern int io_error; |
22585581 | 57 | +#ifdef HAVE_OPENSSL |
8a529471 | 58 | +extern int use_ssl; |
ce06af28 | 59 | +#endif |
9c015a83 | 60 | extern int keep_partial; |
cc3e685d | 61 | extern int got_xfer_error; |
7f0bf1cb WD |
62 | extern char *partial_dir; |
63 | @@ -121,6 +124,14 @@ NORETURN void _exit_cleanup(int code, const char *file, int line) | |
22585581 WD |
64 | code, file, line); |
65 | } | |
78114162 | 66 | |
22585581 WD |
67 | +#ifdef HAVE_OPENSSL |
68 | + /* FALLTHROUGH */ | |
69 | +#include "case_N.h" | |
70 | + | |
b3ea4757 WD |
71 | + if (use_ssl) |
72 | + end_tls(); | |
ce06af28 | 73 | +#endif |
78114162 | 74 | + |
22585581 WD |
75 | /* FALLTHROUGH */ |
76 | #include "case_N.h" | |
77 | ||
cc3e685d WD |
78 | diff --git a/clientserver.c b/clientserver.c |
79 | --- a/clientserver.c | |
80 | +++ b/clientserver.c | |
c0c7984e | 81 | @@ -31,6 +31,9 @@ extern int am_sender; |
d9a67109 WD |
82 | extern int am_server; |
83 | extern int am_daemon; | |
84 | extern int am_root; | |
22585581 | 85 | +#ifdef HAVE_OPENSSL |
ce06af28 WD |
86 | +extern int use_ssl; |
87 | +#endif | |
d9a67109 | 88 | extern int rsync_port; |
c0c7984e | 89 | extern int protect_args; |
f2376a08 | 90 | extern int ignore_errors; |
e66d6d51 | 91 | @@ -126,8 +129,18 @@ int start_socket_client(char *host, int remote_argc, char *remote_argv[], |
f9df736a | 92 | #endif |
ce06af28 | 93 | |
790ba11a | 94 | ret = start_inband_exchange(fd, fd, user, remote_argc, remote_argv); |
9d3fe73a | 95 | + if (ret) |
ce06af28 | 96 | + return ret; |
cc3e685d | 97 | + |
22585581 | 98 | +#ifdef HAVE_OPENSSL |
ce06af28 WD |
99 | + if (use_ssl) { |
100 | + int f_in = get_tls_rfd(); | |
101 | + int f_out = get_tls_wfd(); | |
102 | + return client_run(f_in, f_out, -1, argc, argv); | |
103 | + } | |
104 | +#endif | |
cc3e685d WD |
105 | |
106 | - return ret ? ret : client_run(fd, fd, -1, argc, argv); | |
ce06af28 WD |
107 | + return client_run(fd, fd, -1, argc, argv); |
108 | } | |
109 | ||
790ba11a | 110 | static int exchange_protocols(int f_in, int f_out, char *buf, size_t bufsiz, int am_client) |
e66d6d51 | 111 | @@ -270,6 +283,32 @@ int start_inband_exchange(int f_in, int f_out, const char *user, int argc, char |
be73a66e | 112 | if (verbose > 1) |
c8a8b4a7 | 113 | print_child_argv("sending daemon args:", sargs); |
ce06af28 | 114 | |
22585581 | 115 | +#ifdef HAVE_OPENSSL |
ce06af28 WD |
116 | + if (use_ssl) { |
117 | + io_printf(f_out, "#starttls\n"); | |
118 | + while (1) { | |
790ba11a | 119 | + if (!read_line_old(f_in, line, sizeof line)) { |
ce06af28 WD |
120 | + rprintf(FERROR, "rsync: did not receive reply to #starttls\n"); |
121 | + return -1; | |
122 | + } | |
123 | + if (strncmp(line, "@ERROR", 6) == 0) { | |
2fd4a7f7 | 124 | + rprintf(FERROR, "%s\n", line); |
ce06af28 WD |
125 | + return -1; |
126 | + } | |
790ba11a | 127 | + if (strcmp(line, "@RSYNCD: starttls") == 0) |
ce06af28 | 128 | + break; |
ce06af28 WD |
129 | + rprintf(FINFO, "%s\n", line); |
130 | + } | |
131 | + if (start_tls(f_in, f_out)) { | |
132 | + rprintf(FERROR, "rsync: error during SSL handshake: %s\n", | |
133 | + get_ssl_error()); | |
134 | + return -1; | |
135 | + } | |
136 | + f_in = get_tls_rfd(); | |
137 | + f_out = get_tls_wfd(); | |
138 | + } | |
139 | +#endif | |
140 | + | |
5bf6d6c5 WD |
141 | io_printf(f_out, "%.*s\n", modlen, modname); |
142 | ||
143 | /* Old servers may just drop the connection here, | |
e66d6d51 | 144 | @@ -295,6 +334,10 @@ int start_inband_exchange(int f_in, int f_out, const char *user, int argc, char |
ce06af28 WD |
145 | * server to terminate the listing of modules. |
146 | * We don't want to go on and transfer | |
147 | * anything; just exit. */ | |
22585581 | 148 | +#ifdef HAVE_OPENSSL |
ce06af28 WD |
149 | + if (use_ssl) |
150 | + end_tls(); | |
151 | +#endif | |
152 | exit(0); | |
153 | } | |
154 | ||
e66d6d51 | 155 | @@ -302,6 +345,10 @@ int start_inband_exchange(int f_in, int f_out, const char *user, int argc, char |
7628f156 | 156 | rprintf(FERROR, "%s\n", line); |
ce06af28 WD |
157 | /* This is always fatal; the server will now |
158 | * close the socket. */ | |
22585581 | 159 | +#ifdef HAVE_OPENSSL |
ce06af28 WD |
160 | + if (use_ssl) |
161 | + end_tls(); | |
162 | +#endif | |
9d3fe73a WD |
163 | return -1; |
164 | } | |
165 | ||
e66d6d51 | 166 | @@ -935,6 +982,9 @@ int start_daemon(int f_in, int f_out) |
790ba11a WD |
167 | if (exchange_protocols(f_in, f_out, line, sizeof line, 0) < 0) |
168 | return -1; | |
2fd4a7f7 | 169 | |
22585581 | 170 | +#ifdef HAVE_OPENSSL |
2fd4a7f7 WD |
171 | +retry: |
172 | +#endif | |
173 | line[0] = 0; | |
790ba11a | 174 | if (!read_line_old(f_in, line, sizeof line)) |
2fd4a7f7 | 175 | return -1; |
e66d6d51 | 176 | @@ -946,6 +996,20 @@ int start_daemon(int f_in, int f_out) |
5e929029 WD |
177 | return -1; |
178 | } | |
78114162 | 179 | |
22585581 | 180 | +#ifdef HAVE_OPENSSL |
5e929029 WD |
181 | + if (use_ssl && strcmp(line, "#starttls") == 0) { |
182 | + io_printf(f_out, "@RSYNCD: starttls\n"); | |
183 | + if (start_tls(f_in, f_out)) { | |
184 | + rprintf(FLOG, "SSL connection failed: %s\n", | |
185 | + get_ssl_error()); | |
186 | + return -1; | |
ce06af28 | 187 | + } |
5e929029 WD |
188 | + f_in = get_tls_rfd(); |
189 | + f_out = get_tls_wfd(); | |
2fd4a7f7 | 190 | + goto retry; |
5e929029 | 191 | + } |
ce06af28 | 192 | +#endif |
78114162 | 193 | + |
5e929029 WD |
194 | if (*line == '#') { |
195 | /* it's some sort of command that I don't understand */ | |
196 | io_printf(f_out, "@ERROR: Unknown command '%s'\n", line); | |
cc3e685d WD |
197 | diff --git a/configure.in b/configure.in |
198 | --- a/configure.in | |
199 | +++ b/configure.in | |
200 | @@ -295,6 +295,21 @@ if test x"$enable_locale" != x"no"; then | |
0ca6aebe | 201 | AC_DEFINE(CONFIG_LOCALE) |
ce06af28 WD |
202 | fi |
203 | ||
204 | +AC_ARG_ENABLE(openssl, | |
205 | + AC_HELP_STRING([--enable-openssl], [compile SSL support with OpenSSL.])) | |
206 | + | |
207 | +if test "x$enable_openssl" != xno | |
208 | +then | |
209 | + have_ssl=yes | |
210 | + AC_CHECK_LIB(ssl, SSL_library_init, , [have_ssl=no]) | |
211 | + if test "x$have_ssl" = xyes | |
212 | + then | |
213 | + AC_DEFINE(HAVE_OPENSSL, 1, [true if you want to use SSL.]) | |
214 | + SSL_OBJS=ssl.o | |
215 | + AC_SUBST(SSL_OBJS) | |
216 | + fi | |
217 | +fi | |
218 | + | |
219 | AC_MSG_CHECKING([whether to call shutdown on all sockets]) | |
220 | case $host_os in | |
221 | *cygwin* ) AC_MSG_RESULT(yes) | |
cc3e685d WD |
222 | diff --git a/options.c b/options.c |
223 | --- a/options.c | |
224 | +++ b/options.c | |
c0c7984e | 225 | @@ -185,6 +185,14 @@ int logfile_format_has_o_or_i = 0; |
ce06af28 WD |
226 | int always_checksum = 0; |
227 | int list_only = 0; | |
228 | ||
22585581 | 229 | +#ifdef HAVE_OPENSSL |
ce06af28 WD |
230 | +int use_ssl = 0; |
231 | +char *ssl_cert_path = NULL; | |
232 | +char *ssl_key_path = NULL; | |
233 | +char *ssl_key_passwd = NULL; | |
234 | +char *ssl_ca_path = NULL; | |
235 | +#endif | |
236 | + | |
9be39c35 WD |
237 | #define MAX_BATCH_NAME_LEN 256 /* Must be less than MAXPATHLEN-13 */ |
238 | char *batch_name = NULL; | |
239 | ||
c0c7984e | 240 | @@ -225,6 +233,7 @@ static void print_rsync_version(enum logcode f) |
ce06af28 | 241 | char const *links = "no "; |
58b399b9 | 242 | char const *iconv = "no "; |
ce06af28 WD |
243 | char const *ipv6 = "no "; |
244 | + char const *ssl = "no "; | |
245 | STRUCT_STAT *dumstat; | |
246 | ||
ac2da598 | 247 | #if SUBPROTOCOL_VERSION != 0 |
c0c7984e | 248 | @@ -257,6 +266,9 @@ static void print_rsync_version(enum logcode f) |
85096e5e WD |
249 | #if defined HAVE_LUTIMES && defined HAVE_UTIMES |
250 | symtimes = ""; | |
ce06af28 | 251 | #endif |
22585581 | 252 | +#ifdef HAVE_OPENSSL |
ce06af28 WD |
253 | + ssl = ""; |
254 | +#endif | |
ac2da598 WD |
255 | |
256 | rprintf(f, "%s version %s protocol version %d%s\n", | |
257 | RSYNC_NAME, RSYNC_VERSION, PROTOCOL_VERSION, subprotocol); | |
c0c7984e | 258 | @@ -270,8 +282,8 @@ static void print_rsync_version(enum logcode f) |
5e3c6c93 WD |
259 | (int)(sizeof (int64) * 8)); |
260 | rprintf(f, " %ssocketpairs, %shardlinks, %ssymlinks, %sIPv6, batchfiles, %sinplace,\n", | |
261 | got_socketpair, hardlinks, links, ipv6, have_inplace); | |
85096e5e WD |
262 | - rprintf(f, " %sappend, %sACLs, %sxattrs, %siconv, %ssymtimes\n", |
263 | - have_inplace, acls, xattrs, iconv, symtimes); | |
264 | + rprintf(f, " %sappend, %sACLs, %sxattrs, %siconv, %ssymtimes, %sSSL\n", | |
265 | + have_inplace, acls, xattrs, iconv, symtimes, ssl); | |
5e3c6c93 | 266 | |
ce06af28 | 267 | #ifdef MAINTAINER_MODE |
5e3c6c93 | 268 | rprintf(f, "Panic Action: \"%s\"\n", get_panic_action()); |
c0c7984e | 269 | @@ -433,6 +445,13 @@ void usage(enum logcode F) |
d705d4dd | 270 | #endif |
d4e89c6a WD |
271 | rprintf(F," -4, --ipv4 prefer IPv4\n"); |
272 | rprintf(F," -6, --ipv6 prefer IPv6\n"); | |
22585581 | 273 | +#ifdef HAVE_OPENSSL |
ce06af28 | 274 | + rprintf(F," --ssl allow socket connections to use SSL\n"); |
37d262c5 WD |
275 | + rprintf(F," --ssl-cert=FILE path to daemon's SSL certificate\n"); |
276 | + rprintf(F," --ssl-key=FILE path to daemon's SSL private key\n"); | |
ce06af28 WD |
277 | + rprintf(F," --ssl-key-passwd=PASS password for PEM-encoded private key\n"); |
278 | + rprintf(F," --ssl-ca-certs=FILE path to trusted CA certificates\n"); | |
279 | +#endif | |
896871f8 | 280 | rprintf(F," --version print version number\n"); |
d9a67109 | 281 | rprintf(F,"(-h) --help show this help (-h works with no other options)\n"); |
ce06af28 | 282 | |
c0c7984e | 283 | @@ -446,7 +465,7 @@ enum {OPT_VERSION = 1000, OPT_DAEMON, OPT_SENDER, OPT_EXCLUDE, OPT_EXCLUDE_FROM, |
6849cd84 | 284 | OPT_FILTER, OPT_COMPARE_DEST, OPT_COPY_DEST, OPT_LINK_DEST, OPT_HELP, |
0ca6aebe | 285 | OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_MODIFY_WINDOW, OPT_MIN_SIZE, OPT_CHMOD, |
5398d042 | 286 | OPT_READ_BATCH, OPT_WRITE_BATCH, OPT_ONLY_WRITE_BATCH, OPT_MAX_SIZE, |
85096e5e WD |
287 | - OPT_NO_D, OPT_APPEND, OPT_NO_ICONV, |
288 | + OPT_NO_D, OPT_APPEND, OPT_NO_ICONV, OPT_USE_SSL, | |
0ca6aebe | 289 | OPT_SERVER, OPT_REFUSED_BASE = 9000}; |
ce06af28 | 290 | |
70c5d149 | 291 | static struct poptOption long_options[] = { |
c0c7984e | 292 | @@ -649,6 +668,13 @@ static struct poptOption long_options[] = { |
489b0a72 | 293 | {"checksum-seed", 0, POPT_ARG_INT, &checksum_seed, 0, 0, 0 }, |
0ca6aebe | 294 | {"server", 0, POPT_ARG_NONE, 0, OPT_SERVER, 0, 0 }, |
489b0a72 | 295 | {"sender", 0, POPT_ARG_NONE, 0, OPT_SENDER, 0, 0 }, |
22585581 | 296 | +#ifdef HAVE_OPENSSL |
5388f859 WD |
297 | + {"ssl", 0, POPT_ARG_NONE, 0, OPT_USE_SSL, 0, 0}, |
298 | + {"ssl-cert", 0, POPT_ARG_STRING, &ssl_cert_path, OPT_USE_SSL, 0, 0}, | |
299 | + {"ssl-key", 0, POPT_ARG_STRING, &ssl_key_path, OPT_USE_SSL, 0, 0}, | |
ce06af28 | 300 | + {"ssl-key-passwd", 0, POPT_ARG_STRING, &ssl_key_passwd, OPT_USE_SSL, 0, 0}, |
5388f859 | 301 | + {"ssl-ca-certs", 0, POPT_ARG_STRING, &ssl_ca_path, OPT_USE_SSL, 0, 0}, |
ce06af28 | 302 | +#endif |
489b0a72 | 303 | /* All the following options switch us into daemon-mode option-parsing. */ |
5388f859 | 304 | {"config", 0, POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 }, |
2b06a19d | 305 | {"daemon", 0, POPT_ARG_NONE, 0, OPT_DAEMON, 0, 0 }, |
c0c7984e | 306 | @@ -674,6 +700,13 @@ static void daemon_usage(enum logcode F) |
d705d4dd | 307 | rprintf(F," -v, --verbose increase verbosity\n"); |
144adbf3 WD |
308 | rprintf(F," -4, --ipv4 prefer IPv4\n"); |
309 | rprintf(F," -6, --ipv6 prefer IPv6\n"); | |
22585581 | 310 | +#ifdef HAVE_OPENSSL |
144adbf3 WD |
311 | + rprintf(F," --ssl allow socket connections to use SSL\n"); |
312 | + rprintf(F," --ssl-cert=FILE path to daemon's SSL certificate\n"); | |
313 | + rprintf(F," --ssl-key=FILE path to daemon's SSL private key\n"); | |
314 | + rprintf(F," --ssl-key-passwd=PASS password for PEM-encoded private key\n"); | |
315 | + rprintf(F," --ssl-ca-certs=FILE path to trusted CA certificates\n"); | |
316 | +#endif | |
317 | rprintf(F," --help show this help screen\n"); | |
318 | ||
319 | rprintf(F,"\n"); | |
c0c7984e | 320 | @@ -698,6 +731,13 @@ static struct poptOption long_daemon_options[] = { |
144adbf3 WD |
321 | {"protocol", 0, POPT_ARG_INT, &protocol_version, 0, 0, 0 }, |
322 | {"server", 0, POPT_ARG_NONE, &am_server, 0, 0, 0 }, | |
323 | {"temp-dir", 'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 }, | |
22585581 | 324 | +#ifdef HAVE_OPENSSL |
144adbf3 WD |
325 | + {"ssl", 0, POPT_ARG_NONE, 0, OPT_USE_SSL, 0, 0}, |
326 | + {"ssl-cert", 0, POPT_ARG_STRING, &ssl_cert_path, OPT_USE_SSL, 0, 0}, | |
327 | + {"ssl-key", 0, POPT_ARG_STRING, &ssl_key_path, OPT_USE_SSL, 0, 0}, | |
328 | + {"ssl-key-passwd", 0, POPT_ARG_STRING, &ssl_key_passwd, OPT_USE_SSL, 0, 0}, | |
329 | + {"ssl-ca-certs", 0, POPT_ARG_STRING, &ssl_ca_path, OPT_USE_SSL, 0, 0}, | |
330 | +#endif | |
331 | {"verbose", 'v', POPT_ARG_NONE, 0, 'v', 0, 0 }, | |
332 | {"no-verbose", 0, POPT_ARG_VAL, &verbose, 0, 0, 0 }, | |
333 | {"no-v", 0, POPT_ARG_VAL, &verbose, 0, 0, 0 }, | |
c0c7984e | 334 | @@ -979,6 +1019,12 @@ int parse_arguments(int *argc_p, const char ***argv_p) |
144adbf3 WD |
335 | verbose++; |
336 | break; | |
337 | ||
338 | +#ifdef HAVE_OPENSSL | |
339 | + case OPT_USE_SSL: | |
340 | + use_ssl = 1; | |
341 | + break; | |
342 | +#endif | |
343 | + | |
344 | default: | |
345 | rprintf(FERROR, | |
346 | "rsync: %s: %s (in daemon mode)\n", | |
c0c7984e | 347 | @@ -1002,6 +1048,17 @@ int parse_arguments(int *argc_p, const char ***argv_p) |
144adbf3 WD |
348 | exit_cleanup(RERR_SYNTAX); |
349 | } | |
350 | ||
351 | +#ifdef HAVE_OPENSSL | |
352 | + if (use_ssl) { | |
353 | + if (init_tls()) { | |
354 | + snprintf(err_buf, sizeof(err_buf), | |
355 | + "Openssl error: %s\n", | |
356 | + get_ssl_error()); | |
357 | + return 0; | |
358 | + } | |
359 | + } | |
360 | +#endif | |
361 | + | |
790ba11a WD |
362 | *argv_p = argv = poptGetArgs(pc); |
363 | *argc_p = argc = count_args(argv); | |
144adbf3 | 364 | am_starting_up = 0; |
c0c7984e | 365 | @@ -1260,6 +1317,12 @@ int parse_arguments(int *argc_p, const char ***argv_p) |
5795bf59 | 366 | return 0; |
ffc18846 WD |
367 | #endif |
368 | ||
22585581 | 369 | +#ifdef HAVE_OPENSSL |
144adbf3 | 370 | + case OPT_USE_SSL: |
ce06af28 | 371 | + use_ssl = 1; |
ce06af28 | 372 | + break; |
144adbf3 | 373 | +#endif |
ce06af28 WD |
374 | + |
375 | default: | |
376 | /* A large opt value means that set_refuse_options() | |
27a7053c | 377 | * turned this option off. */ |
c0c7984e | 378 | @@ -1593,6 +1656,17 @@ int parse_arguments(int *argc_p, const char ***argv_p) |
a7219d20 | 379 | if (delay_updates && !partial_dir) |
4a65fe72 | 380 | partial_dir = tmp_partialdir; |
78114162 | 381 | |
22585581 | 382 | +#ifdef HAVE_OPENSSL |
ce06af28 WD |
383 | + if (use_ssl) { |
384 | + if (init_tls()) { | |
385 | + snprintf(err_buf, sizeof(err_buf), | |
386 | + "Openssl error: %s\n", | |
387 | + get_ssl_error()); | |
388 | + return 0; | |
389 | + } | |
390 | + } | |
391 | +#endif | |
78114162 | 392 | + |
4c1f2ca5 | 393 | if (inplace) { |
3d1facaa | 394 | #ifdef HAVE_FTRUNCATE |
4c1f2ca5 | 395 | if (partial_dir) { |
ae306a29 | 396 | @@ -2085,10 +2159,27 @@ char *check_for_hostspec(char *s, char **host_ptr, int *port_ptr) |
def2ace9 WD |
397 | char *p; |
398 | int not_host; | |
8330f4aa | 399 | int hostlen; |
cc3e685d | 400 | - |
def2ace9 | 401 | - if (port_ptr && strncasecmp(URL_PREFIX, s, strlen(URL_PREFIX)) == 0) { |
cc3e685d WD |
402 | + int url_prefix_len = sizeof URL_PREFIX - 1; |
403 | + | |
def2ace9 WD |
404 | + if (!port_ptr) |
405 | + url_prefix_len = 0; | |
406 | + else if (strncasecmp(URL_PREFIX, s, url_prefix_len) != 0) { | |
22585581 | 407 | +#ifdef HAVE_OPENSSL |
def2ace9 WD |
408 | + url_prefix_len = sizeof SSL_URL_PREFIX - 1; |
409 | + if (strncasecmp(SSL_URL_PREFIX, s, url_prefix_len) != 0) | |
410 | + url_prefix_len = 0; | |
411 | + else { | |
412 | + if (!use_ssl) | |
413 | + init_tls(); | |
414 | + use_ssl = 1; | |
415 | + } | |
416 | +#else | |
417 | + url_prefix_len = 0; | |
418 | +#endif | |
419 | + } | |
420 | + if (url_prefix_len) { | |
421 | char *path; | |
def2ace9 WD |
422 | - s += strlen(URL_PREFIX); |
423 | + s += url_prefix_len; | |
424 | if ((p = strchr(s, '/')) != NULL) { | |
425 | hostlen = p - s; | |
426 | path = p + 1; | |
cc3e685d WD |
427 | diff --git a/rsync.h b/rsync.h |
428 | --- a/rsync.h | |
429 | +++ b/rsync.h | |
ffc18846 | 430 | @@ -31,6 +31,7 @@ |
ce06af28 WD |
431 | |
432 | #define DEFAULT_LOCK_FILE "/var/run/rsyncd.lock" | |
433 | #define URL_PREFIX "rsync://" | |
434 | +#define SSL_URL_PREFIX "rsyncs://" | |
435 | ||
cc3e685d WD |
436 | #define SYMLINK_PREFIX "/rsyncd-munged/" |
437 | #define SYMLINK_PREFIX_LEN ((int)sizeof SYMLINK_PREFIX - 1) | |
ae306a29 | 438 | @@ -549,6 +550,11 @@ typedef unsigned int size_t; |
a7219d20 | 439 | # define SIZEOF_INT64 SIZEOF_OFF_T |
78114162 WD |
440 | #endif |
441 | ||
22585581 | 442 | +#ifdef HAVE_OPENSSL |
ce06af28 WD |
443 | +#include <openssl/ssl.h> |
444 | +#include <openssl/err.h> | |
78114162 WD |
445 | +#endif |
446 | + | |
9c25eef5 WD |
447 | struct hashtable { |
448 | void *nodes; | |
449 | int32 size, entries; | |
cc3e685d WD |
450 | diff --git a/ssl.c b/ssl.c |
451 | new file mode 100644 | |
452 | --- /dev/null | |
453 | +++ b/ssl.c | |
144adbf3 | 454 | @@ -0,0 +1,370 @@ |
ce06af28 | 455 | +/* -*- c-file-style: "linux" -*- |
e2e42a01 | 456 | + * ssl.c: operations for negotiating SSL rsync connections. |
ce06af28 WD |
457 | + * |
458 | + * Copyright (C) 2003 Casey Marshall <rsdio@metastatic.org> | |
459 | + * | |
460 | + * This program is free software; you can redistribute it and/or modify | |
461 | + * it under the terms of the GNU General Public License as published by | |
462 | + * the Free Software Foundation; either version 2 of the License, or | |
463 | + * (at your option) any later version. | |
e2e42a01 | 464 | + * |
ce06af28 WD |
465 | + * This program is distributed in the hope that it will be useful, |
466 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
467 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
468 | + * GNU General Public License for more details. | |
e2e42a01 | 469 | + * |
ce06af28 WD |
470 | + * You should have received a copy of the GNU General Public License |
471 | + * along with this program; if not, write to the Free Software | |
472 | + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
473 | + */ | |
474 | + | |
475 | +#include "rsync.h" | |
476 | + | |
22585581 | 477 | +#ifdef HAVE_SYS_SELECT_H |
ce06af28 WD |
478 | +#include <sys/select.h> |
479 | +#else | |
480 | +#include <sys/time.h> | |
481 | +#include <sys/types.h> | |
482 | +#include <unistd.h> | |
483 | +#endif | |
484 | +#include <string.h> | |
485 | + | |
486 | +#define BUF_SIZE 1024 | |
487 | + | |
488 | +extern int verbose; | |
489 | +extern int am_daemon; | |
490 | +extern int am_server; | |
491 | + | |
492 | +extern char *ssl_cert_path; | |
493 | +extern char *ssl_key_path; | |
494 | +extern char *ssl_key_passwd; | |
495 | +extern char *ssl_ca_path; | |
496 | + | |
497 | +static SSL_CTX *ssl_ctx; | |
498 | +static SSL *ssl; | |
499 | +static int tls_read[2] = { -1, -1 }; | |
500 | +static int tls_write[2] = { -1, -1 }; | |
501 | +static int ssl_running; | |
502 | +static int ssl_pid = -1; | |
503 | + | |
144adbf3 WD |
504 | +#ifdef HAVE_SIGACTION |
505 | +static struct sigaction sigact; | |
506 | +#endif | |
507 | + | |
ce06af28 WD |
508 | +/** |
509 | + * A non-interactive callback to be passed to SSL_CTX_set_default_password_cb, | |
510 | + * which merely copies the value of ssl_key_passwd into buf. This is | |
511 | + * used for when the private key password is supplied via an option. | |
512 | + */ | |
513 | +static int default_password_cb(char *buf, int n, UNUSED(int f), UNUSED(void *u)) | |
514 | +{ | |
2fd4a7f7 | 515 | + if (ssl_key_passwd == NULL || n < (int)strlen(ssl_key_passwd)) |
ce06af28 WD |
516 | + return 0; |
517 | + strncpy(buf, ssl_key_passwd, n-1); | |
518 | + return strlen(ssl_key_passwd); | |
519 | +} | |
520 | + | |
521 | +/** | |
522 | + * If verbose, this method traces the status of the SSL handshake. | |
523 | + */ | |
2fd4a7f7 | 524 | +static void info_callback(const SSL *ssl, int cb, int val) |
ce06af28 WD |
525 | +{ |
526 | + char buf[128]; | |
527 | + char *cbs; | |
528 | + | |
529 | + switch (cb) { | |
530 | + case SSL_CB_LOOP: | |
531 | + cbs = "SSL_CB_LOOP"; | |
532 | + break; | |
533 | + case SSL_CB_EXIT: | |
534 | + cbs = "SSL_CB_EXIT"; | |
535 | + break; | |
536 | + case SSL_CB_READ: | |
537 | + cbs = "SSL_CB_READ"; | |
538 | + break; | |
539 | + case SSL_CB_WRITE: | |
540 | + cbs = "SSL_CB_WRITE"; | |
541 | + break; | |
542 | + case SSL_CB_ALERT: | |
543 | + cbs = "SSL_CB_ALERT"; | |
544 | + break; | |
545 | + case SSL_CB_READ_ALERT: | |
546 | + cbs = "SSL_CB_READ_ALERT"; | |
547 | + break; | |
548 | + case SSL_CB_WRITE_ALERT: | |
549 | + cbs = "SSL_CB_WRITE_ALERT"; | |
550 | + break; | |
551 | + case SSL_CB_ACCEPT_LOOP: | |
552 | + cbs = "SSL_CB_ACCEPT_LOOP"; | |
553 | + break; | |
554 | + case SSL_CB_ACCEPT_EXIT: | |
555 | + cbs = "SSL_CB_ACCEPT_EXIT"; | |
556 | + break; | |
557 | + case SSL_CB_CONNECT_LOOP: | |
558 | + cbs = "SSL_CB_CONNECT_LOOP"; | |
559 | + break; | |
560 | + case SSL_CB_CONNECT_EXIT: | |
561 | + cbs = "SSL_CB_CONNECT_EXIT"; | |
562 | + break; | |
563 | + case SSL_CB_HANDSHAKE_START: | |
564 | + cbs = "SSL_CB_HANDSHAKE_START"; | |
565 | + break; | |
566 | + case SSL_CB_HANDSHAKE_DONE: | |
567 | + cbs = "SSL_CB_HANDSHAKE_DONE"; | |
568 | + break; | |
569 | + default: | |
570 | + snprintf(buf, sizeof buf, "??? (%d)", cb); | |
571 | + cbs = buf; | |
572 | + break; | |
573 | + } | |
574 | + if (verbose > 2) { | |
575 | + rprintf(FLOG, "SSL: info_callback(%p,%s,%d)\n", ssl, cbs, val); | |
576 | + if (cb == SSL_CB_HANDSHAKE_DONE) { | |
2fd4a7f7 | 577 | + SSL_CIPHER_description(SSL_get_current_cipher((SSL*)ssl), |
ce06af28 WD |
578 | + buf, sizeof buf); |
579 | + rprintf(FLOG, "SSL: cipher: %s", buf); | |
580 | + } | |
581 | + } | |
582 | +} | |
583 | + | |
584 | +/** | |
585 | + * Initializes the SSL context for TLSv1 connections; returns zero on | |
586 | + * success. | |
587 | + */ | |
588 | +int init_tls(void) | |
589 | +{ | |
590 | + if (ssl_ctx) | |
591 | + return 0; | |
592 | + SSL_library_init(); | |
593 | + SSL_load_error_strings(); | |
594 | + ssl_ctx = SSL_CTX_new(TLSv1_method()); | |
595 | + if (!ssl_ctx) | |
596 | + return 1; | |
597 | + SSL_CTX_set_info_callback(ssl_ctx, info_callback); | |
598 | + | |
599 | + /* Sets the certificate sent to the other party. */ | |
600 | + if (ssl_cert_path != NULL | |
601 | + && SSL_CTX_use_certificate_file(ssl_ctx, ssl_cert_path, | |
602 | + SSL_FILETYPE_PEM) != 1) | |
603 | + return 1; | |
604 | + /* Set up the simple non-interactive callback if the password | |
605 | + * was supplied on the command line. */ | |
606 | + if (ssl_key_passwd != NULL) | |
607 | + SSL_CTX_set_default_passwd_cb(ssl_ctx, default_password_cb); | |
608 | + /* Sets the private key that matches the public certificate. */ | |
609 | + if (ssl_key_path != NULL) { | |
610 | + if (SSL_CTX_use_PrivateKey_file(ssl_ctx, ssl_key_path, | |
611 | + SSL_FILETYPE_PEM) != 1) | |
612 | + return 1; | |
613 | + if (SSL_CTX_check_private_key(ssl_ctx) != 1) | |
614 | + return 1; | |
615 | + } | |
616 | + if (ssl_ca_path != NULL | |
617 | + && !SSL_CTX_load_verify_locations(ssl_ctx, ssl_ca_path, NULL)) | |
618 | + return 1; | |
619 | + | |
620 | + return 0; | |
621 | +} | |
622 | + | |
623 | +/** | |
624 | + * Returns the error string for the current SSL error, if any. | |
625 | + */ | |
626 | +char *get_ssl_error(void) | |
627 | +{ | |
628 | + return ERR_error_string(ERR_get_error(), NULL); | |
629 | +} | |
630 | + | |
631 | +/** | |
632 | + * Returns the input file descriptor for the SSL connection. | |
633 | + */ | |
634 | +int get_tls_rfd(void) | |
635 | +{ | |
636 | + return tls_read[0]; | |
637 | +} | |
638 | + | |
639 | +/** | |
640 | + * Returns the output file descriptor for the SSL connection. | |
641 | + */ | |
642 | +int get_tls_wfd(void) | |
643 | +{ | |
644 | + return tls_write[1]; | |
645 | +} | |
646 | + | |
647 | +/** | |
648 | + * Signal handler that ends the SSL connection. | |
649 | + */ | |
650 | +static RETSIGTYPE tls_sigusr1(int UNUSED(val)) | |
651 | +{ | |
652 | + if (ssl) { | |
653 | + SSL_shutdown(ssl); | |
654 | + SSL_free(ssl); | |
655 | + ssl = NULL; | |
656 | + } | |
657 | + ssl_running = 0; | |
658 | +} | |
659 | + | |
660 | +/** | |
661 | + * Negotiates the TLS connection, creates a socket pair for communicating | |
662 | + * with the rsync process, then forks into a new process that will handle | |
663 | + * the communication. | |
664 | + * | |
665 | + * 0 is returned on success. | |
666 | + */ | |
667 | +int start_tls(int f_in, int f_out) | |
668 | +{ | |
669 | + int tls_fd; | |
670 | + int n = 0, r; | |
671 | + unsigned char buf1[BUF_SIZE], buf2[BUF_SIZE]; | |
672 | + int avail1 = 0, avail2 = 0, write1 = 0, write2 = 0; | |
673 | + fd_set rd, wd; | |
674 | + | |
675 | + if (fd_pair(tls_read)) | |
676 | + return 1; | |
677 | + if (fd_pair(tls_write)) | |
678 | + return 1; | |
679 | + | |
680 | + set_blocking(tls_read[0]); | |
681 | + set_blocking(tls_read[1]); | |
682 | + set_blocking(tls_write[0]); | |
683 | + set_blocking(tls_write[1]); | |
684 | + set_blocking(f_in); | |
685 | + set_blocking(f_out); | |
686 | + | |
687 | + ssl_pid = do_fork(); | |
688 | + if (ssl_pid < 0) | |
689 | + return -1; | |
690 | + if (ssl_pid != 0) { | |
691 | + close(tls_write[0]); | |
692 | + close(tls_read[1]); | |
693 | + return 0; | |
694 | + } | |
695 | + | |
144adbf3 | 696 | + SIGACTION(SIGUSR1, tls_sigusr1); |
ce06af28 WD |
697 | + ssl = SSL_new(ssl_ctx); |
698 | + if (!ssl) | |
699 | + goto closed; | |
700 | + if (am_daemon || am_server) | |
701 | + SSL_set_accept_state(ssl); | |
702 | + else | |
703 | + SSL_set_connect_state(ssl); | |
704 | + SSL_set_rfd(ssl, f_in); | |
705 | + SSL_set_wfd(ssl, f_out); | |
706 | + | |
707 | + tls_fd = SSL_get_fd(ssl); | |
708 | + n = tls_write[0]; | |
709 | + n = MAX(tls_read[1], n); | |
710 | + n = MAX(tls_fd, n) + 1; | |
711 | + | |
712 | + ssl_running = 1; | |
713 | + while (ssl_running) { | |
714 | + FD_ZERO(&rd); | |
715 | + FD_ZERO(&wd); | |
716 | + FD_SET(tls_write[0], &rd); | |
717 | + FD_SET(tls_read[1], &wd); | |
718 | + FD_SET(tls_fd, &rd); | |
719 | + FD_SET(tls_fd, &wd); | |
720 | + | |
721 | + r = select(n, &rd, &wd, NULL, NULL); | |
722 | + | |
723 | + if (r == -1 && errno == EINTR) | |
724 | + continue; | |
725 | + if (FD_ISSET(tls_write[0], &rd)) { | |
726 | + r = read(tls_write[0], buf1+avail1, BUF_SIZE-avail1); | |
727 | + if (r >= 0) | |
728 | + avail1 += r; | |
729 | + else { | |
730 | + rprintf(FERROR, "pipe read error: %s\n", | |
731 | + strerror(errno)); | |
732 | + break; | |
733 | + } | |
734 | + } | |
735 | + if (FD_ISSET(tls_fd, &rd)) { | |
736 | + r = SSL_read(ssl, buf2+avail2, BUF_SIZE-avail2); | |
737 | + if (r > 0) | |
738 | + avail2 += r; | |
739 | + else { | |
740 | + switch (SSL_get_error(ssl, r)) { | |
741 | + case SSL_ERROR_ZERO_RETURN: | |
742 | + goto closed; | |
743 | + case SSL_ERROR_WANT_READ: | |
744 | + case SSL_ERROR_WANT_WRITE: | |
745 | + break; | |
746 | + case SSL_ERROR_SYSCALL: | |
747 | + if (r == 0) | |
748 | + rprintf(FERROR, "SSL spurious EOF\n"); | |
749 | + else | |
750 | + rprintf(FERROR, "SSL I/O error: %s\n", | |
751 | + strerror(errno)); | |
752 | + goto closed; | |
753 | + case SSL_ERROR_SSL: | |
754 | + rprintf(FERROR, "SSL: %s\n", | |
755 | + ERR_error_string(ERR_get_error(), NULL)); | |
756 | + goto closed; | |
757 | + default: | |
758 | + rprintf(FERROR, "unexpected ssl error %d\n", r); | |
759 | + goto closed; | |
760 | + } | |
761 | + } | |
762 | + } | |
763 | + if (FD_ISSET(tls_read[1], &wd) && write2 < avail2) { | |
764 | + r = write(tls_read[1], buf2+write2, avail2-write2); | |
765 | + if (r >= 0) | |
766 | + write2 += r; | |
767 | + else { | |
768 | + rprintf(FERROR, "pipe write error: %s\n", | |
769 | + strerror(errno)); | |
770 | + break; | |
771 | + } | |
772 | + } | |
773 | + if (FD_ISSET(tls_fd, &wd) && write1 < avail1) { | |
774 | + r = SSL_write(ssl, buf1+write1, avail1-write1); | |
775 | + if (r > 0) | |
776 | + write1 += r; | |
777 | + else { | |
778 | + switch (SSL_get_error(ssl, r)) { | |
779 | + case SSL_ERROR_ZERO_RETURN: | |
780 | + goto closed; | |
781 | + case SSL_ERROR_WANT_READ: | |
782 | + case SSL_ERROR_WANT_WRITE: | |
783 | + break; | |
784 | + case SSL_ERROR_SYSCALL: | |
785 | + if (r == 0) | |
786 | + rprintf(FERROR, "SSL: spurious EOF\n"); | |
787 | + else | |
788 | + rprintf(FERROR, "SSL: I/O error: %s\n", | |
789 | + strerror(errno)); | |
790 | + goto closed; | |
791 | + case SSL_ERROR_SSL: | |
792 | + rprintf(FERROR, "SSL: %s\n", | |
793 | + ERR_error_string(ERR_get_error(), NULL)); | |
794 | + goto closed; | |
795 | + default: | |
796 | + rprintf(FERROR, "unexpected ssl error %d\n", r); | |
797 | + goto closed; | |
798 | + } | |
799 | + } | |
800 | + } | |
801 | + if (avail1 == write1) | |
802 | + avail1 = write1 = 0; | |
803 | + if (avail2 == write2) | |
804 | + avail2 = write2 = 0; | |
805 | + } | |
806 | + | |
807 | + /* XXX I'm pretty sure that there is a lot that I am not considering | |
808 | + here. Bugs? Yes, probably. */ | |
809 | + | |
810 | + /* We're finished. */ | |
811 | + closed: | |
812 | + close(tls_read[1]); | |
813 | + close(tls_write[0]); | |
814 | + exit(0); | |
815 | +} | |
816 | + | |
817 | +/** | |
818 | + * Ends the TLS connection. | |
819 | + */ | |
820 | +void end_tls(void) | |
821 | +{ | |
822 | + if (ssl_pid > 0) | |
823 | + kill(ssl_pid, SIGUSR1); | |
824 | +} |