#include <stdlib.h>
#include <stdarg.h>
#include <assert.h>
+
#include <termios.h>
#include <unistd.h>
+#include <fcntl.h>
#include "putty.h"
#include "storage.h"
int console_batch_mode = FALSE;
+static void *console_logctx = NULL;
+
+static struct termios orig_termios_stderr;
+static int stderr_is_a_tty;
+
+void stderr_tty_init()
+{
+ /* Ensure that if stderr is a tty, we can get it back to a sane state. */
+ if ((flags & FLAG_STDERR_TTY) && isatty(STDERR_FILENO)) {
+ stderr_is_a_tty = TRUE;
+ tcgetattr(STDERR_FILENO, &orig_termios_stderr);
+ }
+}
+
+void premsg(struct termios *cf)
+{
+ if (stderr_is_a_tty) {
+ tcgetattr(STDERR_FILENO, cf);
+ tcsetattr(STDERR_FILENO, TCSADRAIN, &orig_termios_stderr);
+ }
+}
+void postmsg(struct termios *cf)
+{
+ if (stderr_is_a_tty)
+ tcsetattr(STDERR_FILENO, TCSADRAIN, cf);
+}
+
/*
* Clean up and exit.
*/
exit(code);
}
+void set_busy_status(void *frontend, int status)
+{
+}
+
void update_specials_menu(void *frontend)
{
}
-void verify_ssh_host_key(void *frontend, char *host, int port, char *keytype,
- char *keystr, char *fingerprint)
+void notify_remote_exit(void *frontend)
+{
+}
+
+void timer_change_notify(unsigned long next)
+{
+}
+
+int verify_ssh_host_key(void *frontend, char *host, int port, char *keytype,
+ char *keystr, char *fingerprint,
+ void (*callback)(void *ctx, int result), void *ctx)
{
int ret;
static const char absentmsg_batch[] =
"The server's host key is not cached. You have no guarantee\n"
"that the server is the computer you think it is.\n"
- "The server's key fingerprint 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. You have no guarantee\n"
"that the server is the computer you think it is.\n"
- "The server's key fingerprint 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"
"cached. This means that either the server administrator\n"
"has changed the host key, or you have actually connected\n"
"to another computer pretending to be the server.\n"
- "The new key fingerprint is:\n"
+ "The new %s key fingerprint is:\n"
"%s\n"
"Connection abandoned.\n";
static const char wrongmsg[] =
"cached. This means that either the server administrator\n"
"has changed the host key, or you have actually connected\n"
"to another computer pretending to be the server.\n"
- "The new key fingerprint is:\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"
static const char abandoned[] = "Connection abandoned.\n";
char line[32];
+ struct termios cf;
/*
* Verify the key.
ret = verify_host_key(host, port, keytype, keystr);
if (ret == 0) /* success - key matched OK */
- return;
+ return 1;
+ premsg(&cf);
if (ret == 2) { /* key was different */
if (console_batch_mode) {
- fprintf(stderr, wrongmsg_batch, fingerprint);
- cleanup_exit(1);
+ fprintf(stderr, wrongmsg_batch, keytype, fingerprint);
+ return 0;
}
- fprintf(stderr, wrongmsg, fingerprint);
+ fprintf(stderr, wrongmsg, keytype, fingerprint);
fflush(stderr);
}
if (ret == 1) { /* key was absent */
if (console_batch_mode) {
- fprintf(stderr, absentmsg_batch, fingerprint);
- cleanup_exit(1);
+ fprintf(stderr, absentmsg_batch, keytype, fingerprint);
+ return 0;
}
- fprintf(stderr, absentmsg, fingerprint);
+ fprintf(stderr, absentmsg, keytype, fingerprint);
fflush(stderr);
}
newmode.c_lflag |= ECHO | ISIG | ICANON;
tcsetattr(0, TCSANOW, &newmode);
line[0] = '\0';
- read(0, line, sizeof(line) - 1);
+ if (read(0, line, sizeof(line) - 1) <= 0)
+ /* handled below */;
tcsetattr(0, TCSANOW, &oldmode);
}
if (line[0] != '\0' && line[0] != '\r' && line[0] != '\n') {
if (line[0] == 'y' || line[0] == 'Y')
store_host_key(host, port, keytype, keystr);
+ postmsg(&cf);
+ return 1;
} else {
fprintf(stderr, abandoned);
- cleanup_exit(0);
+ postmsg(&cf);
+ return 0;
}
}
/*
- * Ask whether the selected cipher is acceptable (since it was
+ * Ask whether the selected algorithm 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)
+int askalg(void *frontend, const char *algtype, const char *algname,
+ void (*callback)(void *ctx, int result), void *ctx)
{
static const char msg[] =
- "The first %scipher supported by the server is\n"
+ "The first %s 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"
+ "The first %s 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];
+ struct termios cf;
+ premsg(&cf);
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_batch, algtype, algname);
+ return 0;
}
- fprintf(stderr, msg,
- (cs == 0) ? "" :
- (cs == 1) ? "client-to-server " : "server-to-client ",
- ciphername);
+ fprintf(stderr, msg, algtype, algname);
fflush(stderr);
{
newmode.c_lflag |= ECHO | ISIG | ICANON;
tcsetattr(0, TCSANOW, &newmode);
line[0] = '\0';
- read(0, line, sizeof(line) - 1);
+ if (read(0, line, sizeof(line) - 1) <= 0)
+ /* handled below */;
tcsetattr(0, TCSANOW, &oldmode);
}
if (line[0] == 'y' || line[0] == 'Y') {
- return;
+ postmsg(&cf);
+ return 1;
} else {
fprintf(stderr, abandoned);
- cleanup_exit(0);
+ postmsg(&cf);
+ return 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)
+int askappend(void *frontend, Filename *filename,
+ void (*callback)(void *ctx, int result), void *ctx)
{
static const char msgtemplate[] =
"The session log file \"%.*s\" already exists.\n"
"Logging will not be enabled.\n";
char line[32];
+ struct termios cf;
+ premsg(&cf);
if (console_batch_mode) {
- fprintf(stderr, msgtemplate_batch, FILENAME_MAX, filename.path);
+ fprintf(stderr, msgtemplate_batch, FILENAME_MAX, filename->path);
fflush(stderr);
return 0;
}
- fprintf(stderr, msgtemplate, FILENAME_MAX, filename.path);
+ fprintf(stderr, msgtemplate, FILENAME_MAX, filename->path);
fflush(stderr);
{
newmode.c_lflag |= ECHO | ISIG | ICANON;
tcsetattr(0, TCSANOW, &newmode);
line[0] = '\0';
- read(0, line, sizeof(line) - 1);
+ if (read(0, line, sizeof(line) - 1) <= 0)
+ /* handled below */;
tcsetattr(0, TCSANOW, &oldmode);
}
+ postmsg(&cf);
if (line[0] == 'y' || line[0] == 'Y')
return 2;
else if (line[0] == 'n' || line[0] == 'N')
void old_keyfile_warning(void)
{
static const char message[] =
- "You are loading an SSH 2 private key which has an\n"
+ "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"
"Once the key is loaded into PuTTYgen, you can perform\n"
"this conversion simply by saving it again.\n";
+ struct termios cf;
+ premsg(&cf);
fputs(message, stderr);
+ postmsg(&cf);
+}
+
+void console_provide_logctx(void *logctx)
+{
+ console_logctx = logctx;
}
void logevent(void *frontend, const char *string)
{
- log_eventlog(logctx, string);
+ struct termios cf;
+ if ((flags & FLAG_STDERR) && (flags & FLAG_VERBOSE))
+ premsg(&cf);
+ if (console_logctx)
+ log_eventlog(console_logctx, string);
+ if ((flags & FLAG_STDERR) && (flags & FLAG_VERBOSE))
+ postmsg(&cf);
}
-int console_get_line(const char *prompt, char *str,
- int maxlen, int is_pw)
+/*
+ * Special functions to read and print to the console for password
+ * prompts and the like. Uses /dev/tty or stdin/stderr, in that order
+ * of preference; also sanitises escape sequences out of the text, on
+ * the basis that it might have been sent by a hostile SSH server
+ * doing malicious keyboard-interactive.
+ */
+static void console_open(FILE **outfp, int *infd)
{
- struct termios oldmode, newmode;
- int i;
+ int fd;
- if (console_batch_mode) {
- if (maxlen > 0)
- str[0] = '\0';
+ if ((fd = open("/dev/tty", O_RDWR)) >= 0) {
+ *infd = fd;
+ *outfp = fdopen(*infd, "w");
} else {
- tcgetattr(0, &oldmode);
+ *infd = 0;
+ *outfp = stderr;
+ }
+}
+static void console_close(FILE *outfp, int infd)
+{
+ if (outfp != stderr)
+ fclose(outfp); /* will automatically close infd too */
+}
+
+static void console_prompt_text(FILE *outfp, const char *data, int len)
+{
+ int i;
+
+ for (i = 0; i < len; i++)
+ if ((data[i] & 0x60) || (data[i] == '\n'))
+ fputc(data[i], outfp);
+ fflush(outfp);
+}
+
+int console_get_userpass_input(prompts_t *p, unsigned char *in, int inlen)
+{
+ size_t curr_prompt;
+ FILE *outfp = NULL;
+ int infd;
+
+ /*
+ * Zero all the results, in case we abort half-way through.
+ */
+ {
+ int i;
+ for (i = 0; i < p->n_prompts; i++)
+ prompt_set_result(p->prompts[i], "");
+ }
+
+ if (p->n_prompts && console_batch_mode)
+ return 0;
+
+ console_open(&outfp, &infd);
+
+ /*
+ * Preamble.
+ */
+ /* We only print the `name' caption if we have to... */
+ if (p->name_reqd && p->name) {
+ size_t l = strlen(p->name);
+ console_prompt_text(outfp, p->name, l);
+ if (p->name[l-1] != '\n')
+ console_prompt_text(outfp, "\n", 1);
+ }
+ /* ...but we always print any `instruction'. */
+ if (p->instruction) {
+ size_t l = strlen(p->instruction);
+ console_prompt_text(outfp, p->instruction, l);
+ if (p->instruction[l-1] != '\n')
+ console_prompt_text(outfp, "\n", 1);
+ }
+
+ for (curr_prompt = 0; curr_prompt < p->n_prompts; curr_prompt++) {
+
+ struct termios oldmode, newmode;
+ int len;
+ prompt_t *pr = p->prompts[curr_prompt];
+
+ tcgetattr(infd, &oldmode);
newmode = oldmode;
newmode.c_lflag |= ISIG | ICANON;
- if (is_pw)
+ if (!pr->echo)
newmode.c_lflag &= ~ECHO;
else
newmode.c_lflag |= ECHO;
- tcsetattr(0, TCSANOW, &newmode);
-
- fputs(prompt, stdout);
- fflush(stdout);
- i = read(0, str, maxlen - 1);
-
- tcsetattr(0, TCSANOW, &oldmode);
+ tcsetattr(infd, TCSANOW, &newmode);
+
+ console_prompt_text(outfp, pr->prompt, strlen(pr->prompt));
+
+ len = 0;
+ while (1) {
+ int ret;
+
+ prompt_ensure_result_size(pr, len * 5 / 4 + 512);
+ ret = read(infd, pr->result + len, pr->resultsize - len - 1);
+ if (ret <= 0) {
+ len = -1;
+ break;
+ }
+ len += ret;
+ if (pr->result[len - 1] == '\n') {
+ len--;
+ break;
+ }
+ }
+
+ tcsetattr(infd, TCSANOW, &oldmode);
+
+ if (!pr->echo)
+ console_prompt_text(outfp, "\n", 1);
+
+ if (len < 0) {
+ console_close(outfp, infd);
+ return 0; /* failure due to read error */
+ }
+
+ pr->result[len] = '\0';
+ }
- if (i > 0 && str[i-1] == '\n')
- i--;
- str[i] = '\0';
+ console_close(outfp, infd);
- if (is_pw)
- fputs("\n", stdout);
- }
- return 1;
+ return 1; /* success */
}
void frontend_keypress(void *handle)
*/
return;
}
+
+int is_interactive(void)
+{
+ return isatty(0);
+}
+
+/*
+ * X11-forwarding-related things suitable for console.
+ */
+
+char *platform_get_x_display(void) {
+ return dupstr(getenv("DISPLAY"));
+}
projects / u / mdw / putty / blobdiff