2 * console.c: various interactive-prompt routines shared between
3 * the Windows console PuTTY tools
14 int console_batch_mode = FALSE;
16 static void *console_logctx = NULL;
21 void cleanup_exit(int code)
36 void notify_remote_exit(void *frontend)
40 void timer_change_notify(long next)
44 void verify_ssh_host_key(void *frontend, char *host, int port, char *keytype,
45 char *keystr, char *fingerprint)
51 static const char absentmsg_batch[] =
52 "The server's host key is not cached in the registry. You\n"
53 "have no guarantee that the server is the computer you\n"
55 "The server's %s key fingerprint is:\n"
57 "Connection abandoned.\n";
58 static const char absentmsg[] =
59 "The server's host key is not cached in the registry. You\n"
60 "have no guarantee that the server is the computer you\n"
62 "The server's %s key fingerprint is:\n"
64 "If you trust this host, enter \"y\" to add the key to\n"
65 "PuTTY's cache and carry on connecting.\n"
66 "If you want to carry on connecting just once, without\n"
67 "adding the key to the cache, enter \"n\".\n"
68 "If you do not trust this host, press Return to abandon the\n"
70 "Store key in cache? (y/n) ";
72 static const char wrongmsg_batch[] =
73 "WARNING - POTENTIAL SECURITY BREACH!\n"
74 "The server's host key does not match the one PuTTY has\n"
75 "cached in the registry. This means that either the\n"
76 "server administrator has changed the host key, or you\n"
77 "have actually connected to another computer pretending\n"
79 "The new %s key fingerprint is:\n"
81 "Connection abandoned.\n";
82 static const char wrongmsg[] =
83 "WARNING - POTENTIAL SECURITY BREACH!\n"
84 "The server's host key does not match the one PuTTY has\n"
85 "cached in the registry. This means that either the\n"
86 "server administrator has changed the host key, or you\n"
87 "have actually connected to another computer pretending\n"
89 "The new %s key fingerprint is:\n"
91 "If you were expecting this change and trust the new key,\n"
92 "enter \"y\" to update PuTTY's cache and continue connecting.\n"
93 "If you want to carry on connecting but without updating\n"
94 "the cache, enter \"n\".\n"
95 "If you want to abandon the connection completely, press\n"
96 "Return to cancel. Pressing Return is the ONLY guaranteed\n"
98 "Update cached key? (y/n, Return cancels connection) ";
100 static const char abandoned[] = "Connection abandoned.\n";
105 * Verify the key against the registry.
107 ret = verify_host_key(host, port, keytype, keystr);
109 if (ret == 0) /* success - key matched OK */
112 if (ret == 2) { /* key was different */
113 if (console_batch_mode) {
114 fprintf(stderr, wrongmsg_batch, keytype, fingerprint);
117 fprintf(stderr, wrongmsg, keytype, fingerprint);
120 if (ret == 1) { /* key was absent */
121 if (console_batch_mode) {
122 fprintf(stderr, absentmsg_batch, keytype, fingerprint);
125 fprintf(stderr, absentmsg, keytype, fingerprint);
129 hin = GetStdHandle(STD_INPUT_HANDLE);
130 GetConsoleMode(hin, &savemode);
131 SetConsoleMode(hin, (savemode | ENABLE_ECHO_INPUT |
132 ENABLE_PROCESSED_INPUT | ENABLE_LINE_INPUT));
133 ReadFile(hin, line, sizeof(line) - 1, &i, NULL);
134 SetConsoleMode(hin, savemode);
136 if (line[0] != '\0' && line[0] != '\r' && line[0] != '\n') {
137 if (line[0] == 'y' || line[0] == 'Y')
138 store_host_key(host, port, keytype, keystr);
140 fprintf(stderr, abandoned);
145 void update_specials_menu(void *frontend)
150 * Ask whether the selected algorithm is acceptable (since it was
151 * below the configured 'warn' threshold).
153 void askalg(void *frontend, const char *algtype, const char *algname)
158 static const char msg[] =
159 "The first %s supported by the server is\n"
160 "%s, which is below the configured warning threshold.\n"
161 "Continue with connection? (y/n) ";
162 static const char msg_batch[] =
163 "The first %s supported by the server is\n"
164 "%s, which is below the configured warning threshold.\n"
165 "Connection abandoned.\n";
166 static const char abandoned[] = "Connection abandoned.\n";
170 if (console_batch_mode) {
171 fprintf(stderr, msg_batch, algtype, algname);
175 fprintf(stderr, msg, algtype, algname);
178 hin = GetStdHandle(STD_INPUT_HANDLE);
179 GetConsoleMode(hin, &savemode);
180 SetConsoleMode(hin, (savemode | ENABLE_ECHO_INPUT |
181 ENABLE_PROCESSED_INPUT | ENABLE_LINE_INPUT));
182 ReadFile(hin, line, sizeof(line) - 1, &i, NULL);
183 SetConsoleMode(hin, savemode);
185 if (line[0] == 'y' || line[0] == 'Y') {
188 fprintf(stderr, abandoned);
194 * Ask whether to wipe a session log file before writing to it.
195 * Returns 2 for wipe, 1 for append, 0 for cancel (don't log).
197 int askappend(void *frontend, Filename filename)
202 static const char msgtemplate[] =
203 "The session log file \"%.*s\" already exists.\n"
204 "You can overwrite it with a new session log,\n"
205 "append your session log to the end of it,\n"
206 "or disable session logging for this session.\n"
207 "Enter \"y\" to wipe the file, \"n\" to append to it,\n"
208 "or just press Return to disable logging.\n"
209 "Wipe the log file? (y/n, Return cancels logging) ";
211 static const char msgtemplate_batch[] =
212 "The session log file \"%.*s\" already exists.\n"
213 "Logging will not be enabled.\n";
217 if (console_batch_mode) {
218 fprintf(stderr, msgtemplate_batch, FILENAME_MAX, filename.path);
222 fprintf(stderr, msgtemplate, FILENAME_MAX, filename.path);
225 hin = GetStdHandle(STD_INPUT_HANDLE);
226 GetConsoleMode(hin, &savemode);
227 SetConsoleMode(hin, (savemode | ENABLE_ECHO_INPUT |
228 ENABLE_PROCESSED_INPUT | ENABLE_LINE_INPUT));
229 ReadFile(hin, line, sizeof(line) - 1, &i, NULL);
230 SetConsoleMode(hin, savemode);
232 if (line[0] == 'y' || line[0] == 'Y')
234 else if (line[0] == 'n' || line[0] == 'N')
241 * Warn about the obsolescent key file format.
243 * Uniquely among these functions, this one does _not_ expect a
244 * frontend handle. This means that if PuTTY is ported to a
245 * platform which requires frontend handles, this function will be
246 * an anomaly. Fortunately, the problem it addresses will not have
247 * been present on that platform, so it can plausibly be
248 * implemented as an empty function.
250 void old_keyfile_warning(void)
252 static const char message[] =
253 "You are loading an SSH 2 private key which has an\n"
254 "old version of the file format. This means your key\n"
255 "file is not fully tamperproof. Future versions of\n"
256 "PuTTY may stop supporting this private key format,\n"
257 "so we recommend you convert your key to the new\n"
260 "Once the key is loaded into PuTTYgen, you can perform\n"
261 "this conversion simply by saving it again.\n";
263 fputs(message, stderr);
266 void console_provide_logctx(void *logctx)
268 console_logctx = logctx;
271 void logevent(void *frontend, const char *string)
274 log_eventlog(console_logctx, string);
277 int console_get_line(const char *prompt, char *str,
278 int maxlen, int is_pw)
281 DWORD savemode, newmode, i;
283 if (console_batch_mode) {
288 hin = GetStdHandle(STD_INPUT_HANDLE);
289 hout = GetStdHandle(STD_OUTPUT_HANDLE);
290 if (hin == INVALID_HANDLE_VALUE || hout == INVALID_HANDLE_VALUE) {
291 fprintf(stderr, "Cannot get standard input/output handles\n");
295 GetConsoleMode(hin, &savemode);
296 newmode = savemode | ENABLE_PROCESSED_INPUT | ENABLE_LINE_INPUT;
298 newmode &= ~ENABLE_ECHO_INPUT;
300 newmode |= ENABLE_ECHO_INPUT;
301 SetConsoleMode(hin, newmode);
303 WriteFile(hout, prompt, strlen(prompt), &i, NULL);
304 ReadFile(hin, str, maxlen - 1, &i, NULL);
306 SetConsoleMode(hin, savemode);
308 if ((int) i > maxlen)
315 WriteFile(hout, "\r\n", 2, &i, NULL);
321 void frontend_keypress(void *handle)
324 * This is nothing but a stub, in console code.