Reintegrate tools from trunk

1 files changed, 409 insertions, 0 deletions

diff --git a/tools/plink/wincons.c b/tools/plink/wincons.c
new file mode 100644
index 000000000..4f984d958
--- /dev/null
+++ b/tools/plink/wincons.c
@@ -0,0 +1,409 @@
+/*

+ * wincons.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 set_busy_status(void *frontend, int status)

+{

+}

+

+void notify_remote_exit(void *frontend)

+{

+}

+

+void timer_change_notify(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;

+    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 1;

+

+    if (ret == 2) {		       /* key was different */

+	if (console_batch_mode) {

+	    fprintf(stderr, wrongmsg_batch, keytype, fingerprint);

+            return 0;

+	}

+	fprintf(stderr, wrongmsg, keytype, fingerprint);

+	fflush(stderr);

+    }

+    if (ret == 1) {		       /* key was absent */

+	if (console_batch_mode) {

+	    fprintf(stderr, absentmsg_batch, keytype, fingerprint);

+            return 0;

+	}

+	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);

+        return 1;

+    } else {

+	fprintf(stderr, abandoned);

+        return 0;

+    }

+}

+

+void update_specials_menu(void *frontend)

+{

+}

+

+/*

+ * Ask whether the selected algorithm is acceptable (since it was

+ * below the configured 'warn' threshold).

+ */

+int askalg(void *frontend, const char *algtype, const char *algname,

+	   void (*callback)(void *ctx, int result), void *ctx)

+{

+    HANDLE hin;

+    DWORD savemode, i;

+

+    static const char msg[] =

+	"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 %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];

+

+    if (console_batch_mode) {

+	fprintf(stderr, msg_batch, algtype, algname);

+	return 0;

+    }

+

+    fprintf(stderr, msg, algtype, algname);

+    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 1;

+    } else {

+	fprintf(stderr, abandoned);

+	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,

+	      void (*callback)(void *ctx, int result), void *ctx)

+{

+    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);

+}

+

+/*

+ * Display the fingerprints of the PGP Master Keys to the user.

+ */

+void pgp_fingerprints(void)

+{

+    fputs("These are the fingerprints of the PuTTY PGP Master Keys. They can\n"

+	  "be used to establish a trust path from this executable to another\n"

+	  "one. See the manual for more information.\n"

+	  "(Note: these fingerprints have nothing to do with SSH!)\n"

+	  "\n"

+	  "PuTTY Master Key (RSA), 1024-bit:\n"

+	  "  " PGP_RSA_MASTER_KEY_FP "\n"

+	  "PuTTY Master Key (DSA), 1024-bit:\n"

+	  "  " PGP_DSA_MASTER_KEY_FP "\n", stdout);

+}

+

+void console_provide_logctx(void *logctx)

+{

+    console_logctx = logctx;

+}

+

+void logevent(void *frontend, const char *string)

+{

+    log_eventlog(console_logctx, string);

+}

+

+static void console_data_untrusted(HANDLE hout, const char *data, int len)

+{

+    DWORD dummy;

+    /* FIXME: control-character filtering */

+    WriteFile(hout, data, len, &dummy, NULL);

+}

+

+int console_get_userpass_input(prompts_t *p, unsigned char *in, int inlen)

+{

+    HANDLE hin, hout;

+    size_t curr_prompt;

+

+    /*

+     * Zero all the results, in case we abort half-way through.

+     */

+    {

+	int i;

+	for (i = 0; i < (int)p->n_prompts; i++)

+	    memset(p->prompts[i]->result, 0, p->prompts[i]->result_len);

+    }

+

+    /*

+     * The prompts_t might contain a message to be displayed but no

+     * actual prompt. More usually, though, it will contain

+     * questions that the user needs to answer, in which case we

+     * need to ensure that we're able to get the answers.

+     */

+    if (p->n_prompts) {

+	if (console_batch_mode)

+	    return 0;

+	hin = GetStdHandle(STD_INPUT_HANDLE);

+	if (hin == INVALID_HANDLE_VALUE) {

+	    fprintf(stderr, "Cannot get standard input handle\n");

+	    cleanup_exit(1);

+	}

+    }

+

+    /*

+     * And if we have anything to print, we need standard output.

+     */

+    if ((p->name_reqd && p->name) || p->instruction || p->n_prompts) {

+	hout = GetStdHandle(STD_OUTPUT_HANDLE);

+	if (hout == INVALID_HANDLE_VALUE) {

+	    fprintf(stderr, "Cannot get standard output handle\n");

+	    cleanup_exit(1);

+	}

+    }

+

+    /*

+     * Preamble.

+     */

+    /* We only print the `name' caption if we have to... */

+    if (p->name_reqd && p->name) {

+	size_t l = strlen(p->name);

+	console_data_untrusted(hout, p->name, l);

+	if (p->name[l-1] != '\n')

+	    console_data_untrusted(hout, "\n", 1);

+    }

+    /* ...but we always print any `instruction'. */

+    if (p->instruction) {

+	size_t l = strlen(p->instruction);

+	console_data_untrusted(hout, p->instruction, l);

+	if (p->instruction[l-1] != '\n')

+	    console_data_untrusted(hout, "\n", 1);

+    }

+

+    for (curr_prompt = 0; curr_prompt < p->n_prompts; curr_prompt++) {

+

+	DWORD savemode, newmode, i = 0;

+	prompt_t *pr = p->prompts[curr_prompt];

+	BOOL r;

+

+	GetConsoleMode(hin, &savemode);

+	newmode = savemode | ENABLE_PROCESSED_INPUT | ENABLE_LINE_INPUT;

+	if (!pr->echo)

+	    newmode &= ~ENABLE_ECHO_INPUT;

+	else

+	    newmode |= ENABLE_ECHO_INPUT;

+	SetConsoleMode(hin, newmode);

+

+	console_data_untrusted(hout, pr->prompt, strlen(pr->prompt));

+

+	r = ReadFile(hin, pr->result, pr->result_len - 1, &i, NULL);

+

+	SetConsoleMode(hin, savemode);

+

+	if ((int) i > pr->result_len)

+	    i = pr->result_len - 1;

+	else

+	    i = i - 2;

+	pr->result[i] = '\0';

+

+	if (!pr->echo) {

+	    DWORD dummy;

+	    WriteFile(hout, "\r\n", 2, &dummy, NULL);

+	}

+

+    }

+

+    return 1; /* success */

+

+}

+

+void frontend_keypress(void *handle)

+{

+    /*

+     * This is nothing but a stub, in console code.

+     */

+    return;

+}