--- /dev/null
+/*
+ * console.c: various interactive-prompt routines shared between
+ * the Windows console PuTTY tools
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+
+#include "putty.h"
+#include "storage.h"
+#include "ssh.h"
+
+int console_batch_mode = FALSE;
+
+static void *console_logctx = NULL;
+
+/*
+ * Clean up and exit.
+ */
+void cleanup_exit(int code)
+{
+ /*
+ * Clean up.
+ */
+ sk_cleanup();
+
+ random_save_seed();
+#ifdef MSCRYPTOAPI
+ crypto_wrapup();
+#endif
+
+ exit(code);
+}
+
+void verify_ssh_host_key(void *frontend, char *host, int port, char *keytype,
+ char *keystr, char *fingerprint)
+{
+ int ret;
+ HANDLE hin;
+ DWORD savemode, i;
+
+ static const char absentmsg_batch[] =
+ "The server's host key is not cached in the registry. You\n"
+ "have no guarantee that the server is the computer you\n"
+ "think it is.\n"
+ "The server's %s key fingerprint is:\n"
+ "%s\n"
+ "Connection abandoned.\n";
+ static const char absentmsg[] =
+ "The server's host key is not cached in the registry. You\n"
+ "have no guarantee that the server is the computer you\n"
+ "think it is.\n"
+ "The server's %s key fingerprint is:\n"
+ "%s\n"
+ "If you trust this host, enter \"y\" to add the key to\n"
+ "PuTTY's cache and carry on connecting.\n"
+ "If you want to carry on connecting just once, without\n"
+ "adding the key to the cache, enter \"n\".\n"
+ "If you do not trust this host, press Return to abandon the\n"
+ "connection.\n"
+ "Store key in cache? (y/n) ";
+
+ static const char wrongmsg_batch[] =
+ "WARNING - POTENTIAL SECURITY BREACH!\n"
+ "The server's host key does not match the one PuTTY has\n"
+ "cached in the registry. This means that either the\n"
+ "server administrator has changed the host key, or you\n"
+ "have actually connected to another computer pretending\n"
+ "to be the server.\n"
+ "The new %s key fingerprint is:\n"
+ "%s\n"
+ "Connection abandoned.\n";
+ static const char wrongmsg[] =
+ "WARNING - POTENTIAL SECURITY BREACH!\n"
+ "The server's host key does not match the one PuTTY has\n"
+ "cached in the registry. This means that either the\n"
+ "server administrator has changed the host key, or you\n"
+ "have actually connected to another computer pretending\n"
+ "to be the server.\n"
+ "The new %s key fingerprint is:\n"
+ "%s\n"
+ "If you were expecting this change and trust the new key,\n"
+ "enter \"y\" to update PuTTY's cache and continue connecting.\n"
+ "If you want to carry on connecting but without updating\n"
+ "the cache, enter \"n\".\n"
+ "If you want to abandon the connection completely, press\n"
+ "Return to cancel. Pressing Return is the ONLY guaranteed\n"
+ "safe choice.\n"
+ "Update cached key? (y/n, Return cancels connection) ";
+
+ static const char abandoned[] = "Connection abandoned.\n";
+
+ char line[32];
+
+ /*
+ * Verify the key against the registry.
+ */
+ ret = verify_host_key(host, port, keytype, keystr);
+
+ if (ret == 0) /* success - key matched OK */
+ return;
+
+ if (ret == 2) { /* key was different */
+ if (console_batch_mode) {
+ fprintf(stderr, wrongmsg_batch, keytype, fingerprint);
+ cleanup_exit(1);
+ }
+ fprintf(stderr, wrongmsg, keytype, fingerprint);
+ fflush(stderr);
+ }
+ if (ret == 1) { /* key was absent */
+ if (console_batch_mode) {
+ fprintf(stderr, absentmsg_batch, keytype, fingerprint);
+ cleanup_exit(1);
+ }
+ fprintf(stderr, absentmsg, keytype, fingerprint);
+ fflush(stderr);
+ }
+
+ hin = GetStdHandle(STD_INPUT_HANDLE);
+ GetConsoleMode(hin, &savemode);
+ SetConsoleMode(hin, (savemode | ENABLE_ECHO_INPUT |
+ ENABLE_PROCESSED_INPUT | ENABLE_LINE_INPUT));
+ ReadFile(hin, line, sizeof(line) - 1, &i, NULL);
+ SetConsoleMode(hin, savemode);
+
+ if (line[0] != '\0' && line[0] != '\r' && line[0] != '\n') {
+ if (line[0] == 'y' || line[0] == 'Y')
+ store_host_key(host, port, keytype, keystr);
+ } else {
+ fprintf(stderr, abandoned);
+ cleanup_exit(0);
+ }
+}
+
+void update_specials_menu(void *frontend)
+{
+}
+
+/*
+ * Ask whether the selected cipher is acceptable (since it was
+ * below the configured 'warn' threshold).
+ * cs: 0 = both ways, 1 = client->server, 2 = server->client
+ */
+void askcipher(void *frontend, char *ciphername, int cs)
+{
+ HANDLE hin;
+ DWORD savemode, i;
+
+ static const char msg[] =
+ "The first %scipher supported by the server is\n"
+ "%s, which is below the configured warning threshold.\n"
+ "Continue with connection? (y/n) ";
+ static const char msg_batch[] =
+ "The first %scipher supported by the server is\n"
+ "%s, which is below the configured warning threshold.\n"
+ "Connection abandoned.\n";
+ static const char abandoned[] = "Connection abandoned.\n";
+
+ char line[32];
+
+ if (console_batch_mode) {
+ fprintf(stderr, msg_batch,
+ (cs == 0) ? "" :
+ (cs == 1) ? "client-to-server " : "server-to-client ",
+ ciphername);
+ cleanup_exit(1);
+ }
+
+ fprintf(stderr, msg,
+ (cs == 0) ? "" :
+ (cs == 1) ? "client-to-server " : "server-to-client ",
+ ciphername);
+ fflush(stderr);
+
+ hin = GetStdHandle(STD_INPUT_HANDLE);
+ GetConsoleMode(hin, &savemode);
+ SetConsoleMode(hin, (savemode | ENABLE_ECHO_INPUT |
+ ENABLE_PROCESSED_INPUT | ENABLE_LINE_INPUT));
+ ReadFile(hin, line, sizeof(line) - 1, &i, NULL);
+ SetConsoleMode(hin, savemode);
+
+ if (line[0] == 'y' || line[0] == 'Y') {
+ return;
+ } else {
+ fprintf(stderr, abandoned);
+ cleanup_exit(0);
+ }
+}
+
+/*
+ * Ask whether to wipe a session log file before writing to it.
+ * Returns 2 for wipe, 1 for append, 0 for cancel (don't log).
+ */
+int askappend(void *frontend, Filename filename)
+{
+ HANDLE hin;
+ DWORD savemode, i;
+
+ static const char msgtemplate[] =
+ "The session log file \"%.*s\" already exists.\n"
+ "You can overwrite it with a new session log,\n"
+ "append your session log to the end of it,\n"
+ "or disable session logging for this session.\n"
+ "Enter \"y\" to wipe the file, \"n\" to append to it,\n"
+ "or just press Return to disable logging.\n"
+ "Wipe the log file? (y/n, Return cancels logging) ";
+
+ static const char msgtemplate_batch[] =
+ "The session log file \"%.*s\" already exists.\n"
+ "Logging will not be enabled.\n";
+
+ char line[32];
+
+ if (console_batch_mode) {
+ fprintf(stderr, msgtemplate_batch, FILENAME_MAX, filename.path);
+ fflush(stderr);
+ return 0;
+ }
+ fprintf(stderr, msgtemplate, FILENAME_MAX, filename.path);
+ fflush(stderr);
+
+ hin = GetStdHandle(STD_INPUT_HANDLE);
+ GetConsoleMode(hin, &savemode);
+ SetConsoleMode(hin, (savemode | ENABLE_ECHO_INPUT |
+ ENABLE_PROCESSED_INPUT | ENABLE_LINE_INPUT));
+ ReadFile(hin, line, sizeof(line) - 1, &i, NULL);
+ SetConsoleMode(hin, savemode);
+
+ if (line[0] == 'y' || line[0] == 'Y')
+ return 2;
+ else if (line[0] == 'n' || line[0] == 'N')
+ return 1;
+ else
+ return 0;
+}
+
+/*
+ * Warn about the obsolescent key file format.
+ *
+ * Uniquely among these functions, this one does _not_ expect a
+ * frontend handle. This means that if PuTTY is ported to a
+ * platform which requires frontend handles, this function will be
+ * an anomaly. Fortunately, the problem it addresses will not have
+ * been present on that platform, so it can plausibly be
+ * implemented as an empty function.
+ */
+void old_keyfile_warning(void)
+{
+ static const char message[] =
+ "You are loading an SSH 2 private key which has an\n"
+ "old version of the file format. This means your key\n"
+ "file is not fully tamperproof. Future versions of\n"
+ "PuTTY may stop supporting this private key format,\n"
+ "so we recommend you convert your key to the new\n"
+ "format.\n"
+ "\n"
+ "Once the key is loaded into PuTTYgen, you can perform\n"
+ "this conversion simply by saving it again.\n";
+
+ fputs(message, stderr);
+}
+
+void console_provide_logctx(void *logctx)
+{
+ console_logctx = logctx;
+}
+
+void logevent(void *frontend, const char *string)
+{
+ if (console_logctx)
+ log_eventlog(console_logctx, string);
+}
+
+int console_get_line(const char *prompt, char *str,
+ int maxlen, int is_pw)
+{
+ HANDLE hin, hout;
+ DWORD savemode, newmode, i;
+
+ if (console_batch_mode) {
+ if (maxlen > 0)
+ str[0] = '\0';
+ } else {
+ hin = GetStdHandle(STD_INPUT_HANDLE);
+ hout = GetStdHandle(STD_OUTPUT_HANDLE);
+ if (hin == INVALID_HANDLE_VALUE || hout == INVALID_HANDLE_VALUE) {
+ fprintf(stderr, "Cannot get standard input/output handles\n");
+ cleanup_exit(1);
+ }
+
+ GetConsoleMode(hin, &savemode);
+ newmode = savemode | ENABLE_PROCESSED_INPUT | ENABLE_LINE_INPUT;
+ if (is_pw)
+ newmode &= ~ENABLE_ECHO_INPUT;
+ else
+ newmode |= ENABLE_ECHO_INPUT;
+ SetConsoleMode(hin, newmode);
+
+ WriteFile(hout, prompt, strlen(prompt), &i, NULL);
+ ReadFile(hin, str, maxlen - 1, &i, NULL);
+
+ SetConsoleMode(hin, savemode);
+
+ if ((int) i > maxlen)
+ i = maxlen - 1;
+ else
+ i = i - 2;
+ str[i] = '\0';
+
+ if (is_pw)
+ WriteFile(hout, "\r\n", 2, &i, NULL);
+
+ }
+ return 1;
+}
+
+void frontend_keypress(void *handle)
+{
+ /*
+ * This is nothing but a stub, in console code.
+ */
+ return;
+}