Fri, 05 Nov 2010 23:14:54 +0000
Remove min() macro from ssl.c
0 | 1 | /*-------------------------------------------------------------------------- |
2 | * LuaSec 0.4 | |
3 | * Copyright (C) 2006-2009 Bruno Silvestre | |
4 | * | |
5 | *--------------------------------------------------------------------------*/ | |
6 | ||
7 | #include <string.h> | |
8 | ||
9 | #include <openssl/ssl.h> | |
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10 | #include <openssl/x509v3.h> |
0 | 11 | #include <openssl/err.h> |
12 | ||
13 | #include <lua.h> | |
14 | #include <lauxlib.h> | |
15 | ||
16 | #include "io.h" | |
17 | #include "buffer.h" | |
18 | #include "timeout.h" | |
19 | #include "socket.h" | |
20 | #include "ssl.h" | |
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21 | #include "x509.h" |
0 | 22 | |
23 | /** | |
24 | * Map error code into string. | |
25 | */ | |
26 | static const char *ssl_ioerror(void *ctx, int err) | |
27 | { | |
28 | if (err == IO_SSL) { | |
29 | p_ssl ssl = (p_ssl) ctx; | |
30 | switch(ssl->error) { | |
31 | case SSL_ERROR_NONE: return "No error"; | |
32 | case SSL_ERROR_ZERO_RETURN: return "closed"; | |
33 | case SSL_ERROR_WANT_READ: return "wantread"; | |
34 | case SSL_ERROR_WANT_WRITE: return "wantwrite"; | |
35 | case SSL_ERROR_WANT_CONNECT: return "'connect' not completed"; | |
36 | case SSL_ERROR_WANT_ACCEPT: return "'accept' not completed"; | |
37 | case SSL_ERROR_WANT_X509_LOOKUP: return "Waiting for callback"; | |
38 | case SSL_ERROR_SYSCALL: return "System error"; | |
39 | case SSL_ERROR_SSL: return ERR_reason_error_string(ERR_get_error()); | |
40 | default: return "Unknown SSL error"; | |
41 | } | |
42 | } | |
43 | return socket_strerror(err); | |
44 | } | |
45 | ||
46 | /** | |
47 | * Close the connection before the GC collect the object. | |
48 | */ | |
49 | static int meth_destroy(lua_State *L) | |
50 | { | |
51 | p_ssl ssl = (p_ssl) lua_touserdata(L, 1); | |
52 | if (ssl->ssl) { | |
53 | socket_setblocking(&ssl->sock); | |
54 | SSL_shutdown(ssl->ssl); | |
55 | socket_destroy(&ssl->sock); | |
56 | SSL_free(ssl->ssl); | |
57 | ssl->ssl = NULL; | |
58 | } | |
59 | return 0; | |
60 | } | |
61 | ||
62 | /** | |
63 | * Perform the TLS/SSL handshake | |
64 | */ | |
65 | static int handshake(p_ssl ssl) | |
66 | { | |
67 | int err; | |
68 | p_timeout tm = timeout_markstart(&ssl->tm); | |
69 | if (ssl->state == ST_SSL_CLOSED) | |
70 | return IO_CLOSED; | |
71 | for ( ; ; ) { | |
72 | ERR_clear_error(); | |
73 | err = SSL_do_handshake(ssl->ssl); | |
74 | ssl->error = SSL_get_error(ssl->ssl, err); | |
75 | switch(ssl->error) { | |
76 | case SSL_ERROR_NONE: | |
77 | ssl->state = ST_SSL_CONNECTED; | |
78 | return IO_DONE; | |
79 | case SSL_ERROR_WANT_READ: | |
80 | err = socket_waitfd(&ssl->sock, WAITFD_R, tm); | |
81 | if (err == IO_TIMEOUT) return IO_SSL; | |
82 | if (err != IO_DONE) return err; | |
83 | break; | |
84 | case SSL_ERROR_WANT_WRITE: | |
85 | err = socket_waitfd(&ssl->sock, WAITFD_W, tm); | |
86 | if (err == IO_TIMEOUT) return IO_SSL; | |
87 | if (err != IO_DONE) return err; | |
88 | break; | |
89 | case SSL_ERROR_SYSCALL: | |
90 | if (ERR_peek_error()) { | |
91 | ssl->error = SSL_ERROR_SSL; | |
92 | return IO_SSL; | |
93 | } | |
94 | if (err == 0) | |
95 | return IO_CLOSED; | |
96 | return socket_error(); | |
97 | default: | |
98 | return IO_SSL; | |
99 | } | |
100 | } | |
101 | return IO_UNKNOWN; | |
102 | } | |
103 | ||
104 | /** | |
105 | * Send data | |
106 | */ | |
107 | static int ssl_send(void *ctx, const char *data, size_t count, size_t *sent, | |
108 | p_timeout tm) | |
109 | { | |
110 | int err; | |
111 | p_ssl ssl = (p_ssl) ctx; | |
112 | if (ssl->state == ST_SSL_CLOSED) | |
113 | return IO_CLOSED; | |
114 | *sent = 0; | |
115 | for ( ; ; ) { | |
116 | ERR_clear_error(); | |
117 | err = SSL_write(ssl->ssl, data, (int) count); | |
118 | ssl->error = SSL_get_error(ssl->ssl, err); | |
119 | switch(ssl->error) { | |
120 | case SSL_ERROR_NONE: | |
121 | *sent = err; | |
122 | return IO_DONE; | |
123 | case SSL_ERROR_WANT_READ: | |
124 | err = socket_waitfd(&ssl->sock, WAITFD_R, tm); | |
125 | if (err == IO_TIMEOUT) return IO_SSL; | |
126 | if (err != IO_DONE) return err; | |
127 | break; | |
128 | case SSL_ERROR_WANT_WRITE: | |
129 | err = socket_waitfd(&ssl->sock, WAITFD_W, tm); | |
130 | if (err == IO_TIMEOUT) return IO_SSL; | |
131 | if (err != IO_DONE) return err; | |
132 | break; | |
133 | case SSL_ERROR_SYSCALL: | |
134 | if (ERR_peek_error()) { | |
135 | ssl->error = SSL_ERROR_SSL; | |
136 | return IO_SSL; | |
137 | } | |
138 | if (err == 0) | |
139 | return IO_CLOSED; | |
140 | return socket_error(); | |
141 | default: | |
142 | return IO_SSL; | |
143 | } | |
144 | } | |
145 | return IO_UNKNOWN; | |
146 | } | |
147 | ||
148 | /** | |
149 | * Receive data | |
150 | */ | |
151 | static int ssl_recv(void *ctx, char *data, size_t count, size_t *got, | |
152 | p_timeout tm) | |
153 | { | |
154 | int err; | |
155 | p_ssl ssl = (p_ssl) ctx; | |
156 | if (ssl->state == ST_SSL_CLOSED) | |
157 | return IO_CLOSED; | |
158 | *got = 0; | |
159 | for ( ; ; ) { | |
160 | ERR_clear_error(); | |
161 | err = SSL_read(ssl->ssl, data, (int) count); | |
162 | ssl->error = SSL_get_error(ssl->ssl, err); | |
163 | switch(ssl->error) { | |
164 | case SSL_ERROR_NONE: | |
165 | *got = err; | |
166 | return IO_DONE; | |
167 | case SSL_ERROR_ZERO_RETURN: | |
168 | *got = err; | |
169 | return IO_CLOSED; | |
170 | case SSL_ERROR_WANT_READ: | |
171 | err = socket_waitfd(&ssl->sock, WAITFD_R, tm); | |
172 | if (err == IO_TIMEOUT) return IO_SSL; | |
173 | if (err != IO_DONE) return err; | |
174 | break; | |
175 | case SSL_ERROR_WANT_WRITE: | |
176 | err = socket_waitfd(&ssl->sock, WAITFD_W, tm); | |
177 | if (err == IO_TIMEOUT) return IO_SSL; | |
178 | if (err != IO_DONE) return err; | |
179 | break; | |
180 | case SSL_ERROR_SYSCALL: | |
181 | if (ERR_peek_error()) { | |
182 | ssl->error = SSL_ERROR_SSL; | |
183 | return IO_SSL; | |
184 | } | |
185 | if (err == 0) | |
186 | return IO_CLOSED; | |
187 | return socket_error(); | |
188 | default: | |
189 | return IO_SSL; | |
190 | } | |
191 | } | |
192 | return IO_UNKNOWN; | |
193 | } | |
194 | ||
195 | /** | |
196 | * Create a new TLS/SSL object and mark it as new. | |
197 | */ | |
198 | static int meth_create(lua_State *L) | |
199 | { | |
200 | p_ssl ssl; | |
201 | int mode = ctx_getmode(L, 1); | |
202 | SSL_CTX *ctx = ctx_getcontext(L, 1); | |
203 | ||
204 | if (mode == MD_CTX_INVALID) { | |
205 | lua_pushnil(L); | |
206 | lua_pushstring(L, "invalid mode"); | |
207 | return 2; | |
208 | } | |
209 | ssl = (p_ssl) lua_newuserdata(L, sizeof(t_ssl)); | |
210 | if (!ssl) { | |
211 | lua_pushnil(L); | |
212 | lua_pushstring(L, "error creating SSL object"); | |
213 | return 2; | |
214 | } | |
215 | ssl->ssl = SSL_new(ctx); | |
216 | if (!ssl->ssl) { | |
217 | lua_pushnil(L); | |
218 | lua_pushstring(L, "error creating SSL object"); | |
219 | return 2;; | |
220 | } | |
221 | ssl->state = ST_SSL_NEW; | |
222 | SSL_set_fd(ssl->ssl, (int) SOCKET_INVALID); | |
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223 | SSL_set_mode(ssl->ssl, SSL_MODE_ENABLE_PARTIAL_WRITE | |
0 | 224 | SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER); |
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225 | |
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226 | #ifdef SSL_MODE_RELEASE_BUFFERS |
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227 | SSL_set_mode(ssl->ssl, SSL_MODE_RELEASE_BUFFERS); |
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228 | #endif |
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229 | |
0 | 230 | if (mode == MD_CTX_SERVER) |
231 | SSL_set_accept_state(ssl->ssl); | |
232 | else | |
233 | SSL_set_connect_state(ssl->ssl); | |
234 | ||
235 | io_init(&ssl->io, (p_send) ssl_send, (p_recv) ssl_recv, | |
236 | (p_error) ssl_ioerror, ssl); | |
237 | timeout_init(&ssl->tm, -1, -1); | |
238 | buffer_init(&ssl->buf, &ssl->io, &ssl->tm); | |
239 | ||
240 | luaL_getmetatable(L, "SSL:Connection"); | |
241 | lua_setmetatable(L, -2); | |
242 | return 1; | |
243 | } | |
244 | ||
245 | /** | |
246 | * Buffer send function | |
247 | */ | |
248 | static int meth_send(lua_State *L) { | |
249 | p_ssl ssl = (p_ssl) luaL_checkudata(L, 1, "SSL:Connection"); | |
250 | return buffer_meth_send(L, &ssl->buf); | |
251 | } | |
252 | ||
253 | /** | |
254 | * Buffer receive function | |
255 | */ | |
256 | static int meth_receive(lua_State *L) { | |
257 | p_ssl ssl = (p_ssl) luaL_checkudata(L, 1, "SSL:Connection"); | |
258 | return buffer_meth_receive(L, &ssl->buf); | |
259 | } | |
260 | ||
261 | /** | |
262 | * Select support methods | |
263 | */ | |
264 | static int meth_getfd(lua_State *L) | |
265 | { | |
266 | p_ssl ssl = (p_ssl) luaL_checkudata(L, 1, "SSL:Connection"); | |
267 | lua_pushnumber(L, ssl->sock); | |
268 | return 1; | |
269 | } | |
270 | ||
271 | /** | |
272 | * Set the TLS/SSL file descriptor. | |
273 | * This is done *before* the handshake. | |
274 | */ | |
275 | static int meth_setfd(lua_State *L) | |
276 | { | |
277 | p_ssl ssl = (p_ssl) luaL_checkudata(L, 1, "SSL:Connection"); | |
278 | if (ssl->state != ST_SSL_NEW) | |
279 | luaL_argerror(L, 1, "invalid SSL object state"); | |
280 | ssl->sock = luaL_checkint(L, 2); | |
281 | socket_setnonblocking(&ssl->sock); | |
282 | SSL_set_fd(ssl->ssl, (int)ssl->sock); | |
283 | return 0; | |
284 | } | |
285 | ||
286 | /** | |
287 | * Lua handshake function. | |
288 | */ | |
289 | static int meth_handshake(lua_State *L) | |
290 | { | |
291 | p_ssl ssl = (p_ssl) luaL_checkudata(L, 1, "SSL:Connection"); | |
292 | int err = handshake(ssl); | |
293 | if (err == IO_DONE) { | |
294 | lua_pushboolean(L, 1); | |
295 | return 1; | |
296 | } | |
297 | lua_pushboolean(L, 0); | |
298 | lua_pushstring(L, ssl_ioerror((void*)ssl, err)); | |
299 | return 2; | |
300 | } | |
301 | ||
302 | /** | |
303 | * Close the connection. | |
304 | */ | |
305 | static int meth_close(lua_State *L) | |
306 | { | |
307 | p_ssl ssl = (p_ssl) luaL_checkudata(L, 1, "SSL:Connection"); | |
308 | meth_destroy(L); | |
309 | ssl->state = ST_SSL_CLOSED; | |
310 | return 0; | |
311 | } | |
312 | ||
313 | /** | |
314 | * Set timeout. | |
315 | */ | |
316 | static int meth_settimeout(lua_State *L) | |
317 | { | |
318 | p_ssl ssl = (p_ssl) luaL_checkudata(L, 1, "SSL:Connection"); | |
319 | return timeout_meth_settimeout(L, &ssl->tm); | |
320 | } | |
321 | ||
322 | /** | |
323 | * Check if there is data in the buffer. | |
324 | */ | |
325 | static int meth_dirty(lua_State *L) | |
326 | { | |
327 | int res = 0; | |
328 | p_ssl ssl = (p_ssl) luaL_checkudata(L, 1, "SSL:Connection"); | |
329 | if (ssl->state != ST_SSL_CLOSED) | |
330 | res = !buffer_isempty(&ssl->buf) || SSL_pending(ssl->ssl); | |
331 | lua_pushboolean(L, res); | |
332 | return 1; | |
333 | } | |
334 | ||
335 | /** | |
336 | * Return the state information about the SSL object. | |
337 | */ | |
338 | static int meth_want(lua_State *L) | |
339 | { | |
340 | p_ssl ssl = (p_ssl) luaL_checkudata(L, 1, "SSL:Connection"); | |
341 | int code = (ssl->state == ST_SSL_CLOSED) ? SSL_NOTHING : SSL_want(ssl->ssl); | |
342 | switch(code) { | |
343 | case SSL_NOTHING: lua_pushstring(L, "nothing"); break; | |
344 | case SSL_READING: lua_pushstring(L, "read"); break; | |
345 | case SSL_WRITING: lua_pushstring(L, "write"); break; | |
346 | case SSL_X509_LOOKUP: lua_pushstring(L, "x509lookup"); break; | |
347 | } | |
348 | return 1; | |
349 | } | |
350 | ||
351 | /** | |
352 | * Return a pointer to SSL structure. | |
353 | */ | |
354 | static int meth_rawconn(lua_State *L) | |
355 | { | |
356 | p_ssl ssl = (p_ssl)luaL_checkudata(L, 1, "SSL:Connection"); | |
357 | lua_pushlightuserdata(L, (void*)ssl->ssl); | |
358 | return 1; | |
359 | } | |
360 | ||
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361 | /** |
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362 | * Return the compression method used. |
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363 | */ |
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364 | static int meth_compression(lua_State *L) |
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365 | { |
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366 | const COMP_METHOD *comp; |
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367 | p_ssl ssl = (p_ssl)luaL_checkudata(L, 1, "SSL:Connection"); |
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368 | comp = SSL_get_current_compression(ssl->ssl); |
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369 | if (comp) { |
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370 | lua_pushstring(L, SSL_COMP_get_name(comp)); |
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371 | return 1; |
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372 | } else { |
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373 | lua_pushboolean(L, 0); |
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374 | return 1; |
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375 | } |
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376 | } |
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377 | |
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378 | /** |
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379 | * Return the peer certificate. |
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380 | */ |
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381 | static int meth_getpeercertificate(lua_State *L) |
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382 | { |
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383 | X509 *peer; |
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384 | p_ssl ssl = (p_ssl)luaL_checkudata(L, 1, "SSL:Connection"); |
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385 | peer = SSL_get_peer_certificate(ssl->ssl); |
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386 | if (peer == NULL) { |
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387 | /* No client certificate available */ |
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388 | lua_pushnil(L); |
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389 | } |
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390 | else |
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391 | { |
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392 | /* Push metatabled peer */ |
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393 | luasec_push_x509(L, peer); |
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394 | } |
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395 | return 1; |
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396 | } |
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397 | |
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398 | static int meth_getfinished(lua_State *L) |
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399 | { |
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400 | p_ssl ssl = (p_ssl)luaL_checkudata(L, 1, "SSL:Connection"); |
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401 | SSL *conn = ssl->ssl; |
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402 | char *buffer = NULL; |
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403 | size_t len = 0; |
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404 | if ((len = SSL_get_finished(conn, NULL, 0)) != 0) { |
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405 | buffer = malloc(len); |
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406 | if (buffer == NULL) return 0; |
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407 | len = SSL_get_finished(conn, buffer, len); |
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408 | lua_pushlstring(L, buffer, len); |
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409 | free(buffer); |
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410 | return 1; |
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411 | } else { |
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412 | return 0; |
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413 | } |
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414 | } |
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415 | |
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416 | static int meth_getpeerfinished(lua_State *L) |
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417 | { |
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418 | p_ssl ssl = (p_ssl)luaL_checkudata(L, 1, "SSL:Connection"); |
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419 | SSL *conn = ssl->ssl; |
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420 | char *buffer = NULL; |
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421 | size_t len = 0; |
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422 | if ((len = SSL_get_peer_finished(conn, NULL, 0)) != 0) { |
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423 | buffer = malloc(len); |
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424 | if (buffer == NULL) return 0; |
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425 | len = SSL_get_peer_finished(conn, buffer, len); |
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426 | lua_pushlstring(L, buffer, len); |
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427 | free(buffer); |
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428 | return 1; |
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429 | } else { |
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430 | return 0; |
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431 | } |
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432 | } |
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433 | |
0 | 434 | /*---------------------------------------------------------------------------*/ |
435 | ||
436 | ||
437 | /** | |
438 | * SSL metamethods | |
439 | */ | |
440 | static luaL_Reg meta[] = { | |
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441 | {"close", meth_close}, |
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442 | {"getfd", meth_getfd}, |
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443 | {"dirty", meth_dirty}, |
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444 | {"dohandshake", meth_handshake}, |
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445 | {"receive", meth_receive}, |
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446 | {"send", meth_send}, |
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447 | {"settimeout", meth_settimeout}, |
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448 | {"want", meth_want}, |
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449 | {"compression", meth_compression}, |
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450 | {"getpeercertificate",meth_getpeercertificate}, |
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451 | {"getfinished", meth_getfinished}, |
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452 | {"getpeerfinished", meth_getpeerfinished}, |
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453 | {NULL, NULL} |
0 | 454 | }; |
455 | ||
456 | /** | |
457 | * SSL functions | |
458 | */ | |
459 | static luaL_Reg funcs[] = { | |
460 | {"create", meth_create}, | |
461 | {"setfd", meth_setfd}, | |
462 | {"rawconnection", meth_rawconn}, | |
463 | {NULL, NULL} | |
464 | }; | |
465 | ||
466 | /** | |
467 | * Initialize modules | |
468 | */ | |
469 | LUASEC_API int luaopen_ssl_core(lua_State *L) | |
470 | { | |
471 | /* Initialize SSL */ | |
472 | if (!SSL_library_init()) { | |
473 | lua_pushstring(L, "unable to initialize SSL library"); | |
474 | lua_error(L); | |
475 | } | |
476 | SSL_load_error_strings(); | |
477 | ||
478 | /* Initialize internal library */ | |
479 | socket_open(); | |
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480 | |
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481 | /* Register the functions and tables */ |
0 | 482 | luaL_newmetatable(L, "SSL:Connection"); |
483 | lua_newtable(L); | |
484 | luaL_register(L, NULL, meta); | |
485 | lua_setfield(L, -2, "__index"); | |
486 | lua_pushcfunction(L, meth_destroy); | |
487 | lua_setfield(L, -2, "__gc"); | |
488 | ||
489 | luaL_register(L, "ssl.core", funcs); | |
490 | lua_pushnumber(L, SOCKET_INVALID); | |
491 | lua_setfield(L, -2, "invalidfd"); | |
492 | ||
493 | return 1; | |
494 | } | |
495 |