X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/putty/blobdiff_plain/6da411554bfe4c2a8ddfbb0616b0030ea5e813f5..5462f4596108c4309fb69b4e57aa1e59d7100908:/windows/winutils.c

diff --git a/windows/winutils.c b/windows/winutils.c
index b2921245..f68405bc 100644
--- a/windows/winutils.c
+++ b/windows/winutils.c
@@ -6,22 +6,176 @@
 #include <stdlib.h>
 #include <ctype.h>
 
+#include "putty.h"
 #include "misc.h"
 
 #ifdef TESTMODE
-/* Definitions to allow this module to be compiled standalone for testing. */
+/* Definitions to allow this module to be compiled standalone for testing
+ * split_into_argv(). */
 #define smalloc malloc
 #define srealloc realloc
 #define sfree free
 #endif
 
 /*
- * Split a complete command line into argc/argv, attempting to do
- * it exactly the same way Windows itself would do it (so that
- * console utilities, which receive argc and argv from Windows,
- * will have their command lines processed in the same way as GUI
- * utilities which get a whole command line and must break it
- * themselves).
+ * GetOpenFileName/GetSaveFileName tend to muck around with the process'
+ * working directory on at least some versions of Windows.
+ * Here's a wrapper that gives more control over this, and hides a little
+ * bit of other grottiness.
+ */
+
+struct filereq_tag {
+    TCHAR cwd[MAX_PATH];
+};
+
+/*
+ * `of' is expected to be initialised with most interesting fields, but
+ * this function does some administrivia. (assume `of' was memset to 0)
+ * save==1 -> GetSaveFileName; save==0 -> GetOpenFileName
+ * `state' is optional.
+ */
+BOOL request_file(filereq *state, OPENFILENAME *of, int preserve, int save)
+{
+    TCHAR cwd[MAX_PATH]; /* process CWD */
+    BOOL ret;
+
+    /* Get process CWD */
+    if (preserve) {
+	DWORD r = GetCurrentDirectory(lenof(cwd), cwd);
+	if (r == 0 || r >= lenof(cwd))
+	    /* Didn't work, oh well. Stop trying to be clever. */
+	    preserve = 0;
+    }
+
+    /* Open the file requester, maybe setting lpstrInitialDir */
+    {
+#ifdef OPENFILENAME_SIZE_VERSION_400
+	of->lStructSize = OPENFILENAME_SIZE_VERSION_400;
+#else
+	of->lStructSize = sizeof(*of);
+#endif
+	of->lpstrInitialDir = (state && state->cwd[0]) ? state->cwd : NULL;
+	/* Actually put up the requester. */
+	ret = save ? GetSaveFileName(of) : GetOpenFileName(of);
+    }
+
+    /* Get CWD left by requester */
+    if (state) {
+	DWORD r = GetCurrentDirectory(lenof(state->cwd), state->cwd);
+	if (r == 0 || r >= lenof(state->cwd))
+	    /* Didn't work, oh well. */
+	    state->cwd[0] = '\0';
+    }
+    
+    /* Restore process CWD */
+    if (preserve)
+	/* If it fails, there's not much we can do. */
+	(void) SetCurrentDirectory(cwd);
+
+    return ret;
+}
+
+filereq *filereq_new(void)
+{
+    filereq *ret = snew(filereq);
+    ret->cwd[0] = '\0';
+    return ret;
+}
+
+void filereq_free(filereq *state)
+{
+    sfree(state);
+}
+
+/*
+ * Message box with optional context help.
+ */
+
+/* Callback function to launch context help. */
+static VOID CALLBACK message_box_help_callback(LPHELPINFO lpHelpInfo)
+{
+    char *context = NULL;
+#define CHECK_CTX(name) \
+    do { \
+	if (lpHelpInfo->dwContextId == WINHELP_CTXID_ ## name) \
+	    context = WINHELP_CTX_ ## name; \
+    } while (0)
+    CHECK_CTX(errors_hostkey_absent);
+    CHECK_CTX(errors_hostkey_changed);
+    CHECK_CTX(errors_cantloadkey);
+    CHECK_CTX(option_cleanup);
+    CHECK_CTX(pgp_fingerprints);
+#undef CHECK_CTX
+    if (context)
+	launch_help(hwnd, context);
+}
+
+int message_box(LPCTSTR text, LPCTSTR caption, DWORD style, DWORD helpctxid)
+{
+    MSGBOXPARAMS mbox;
+    
+    /*
+     * We use MessageBoxIndirect() because it allows us to specify a
+     * callback function for the Help button.
+     */
+    mbox.cbSize = sizeof(mbox);
+    /* Assumes the globals `hinst' and `hwnd' have sensible values. */
+    mbox.hInstance = hinst;
+    mbox.hwndOwner = hwnd;
+    mbox.lpfnMsgBoxCallback = &message_box_help_callback;
+    mbox.dwLanguageId = LANG_NEUTRAL;
+    mbox.lpszText = text;
+    mbox.lpszCaption = caption;
+    mbox.dwContextHelpId = helpctxid;
+    mbox.dwStyle = style;
+    if (helpctxid != 0 && has_help()) mbox.dwStyle |= MB_HELP;
+    return MessageBoxIndirect(&mbox);
+}
+
+/*
+ * Display the fingerprints of the PGP Master Keys to the user.
+ */
+void pgp_fingerprints(void)
+{
+    message_box("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,
+		"PGP fingerprints", MB_ICONINFORMATION | MB_OK,
+		HELPCTXID(pgp_fingerprints));
+}
+
+/*
+ * Handy wrapper around GetDlgItemText which doesn't make you invent
+ * an arbitrary length limit on the output string. Returned string is
+ * dynamically allocated; caller must free.
+ */
+char *GetDlgItemText_alloc(HWND hwnd, int id)
+{
+    char *ret = NULL;
+    int size = 0;
+
+    do {
+	size = size * 4 / 3 + 512;
+	ret = sresize(ret, size, char);
+	GetDlgItemText(hwnd, id, ret, size);
+    } while (!memchr(ret, '\0', size-1));
+
+    return ret;
+}
+
+/*
+ * Split a complete command line into argc/argv, attempting to do it
+ * exactly the same way the Visual Studio C library would do it (so
+ * that our console utilities, which receive argc and argv already
+ * broken apart by the C library, will have their command lines
+ * processed in the same way as the GUI utilities which get a whole
+ * command line and must call this function).
  * 
  * Does not modify the input command line.
  * 
@@ -42,7 +196,17 @@ void split_into_argv(char *cmdline, int *argc, char ***argv,
     int outputargc;
 
     /*
-     * At first glance the rules appeared to be:
+     * These argument-breaking rules apply to Visual Studio 7, which
+     * is currently the compiler expected to be used for PuTTY. Visual
+     * Studio 10 has different rules, lacking the curious mod 3
+     * behaviour of consecutive quotes described below; I presume they
+     * fixed a bug. As and when we migrate to a newer compiler, we'll
+     * have to adjust this to match; however, for the moment we
+     * faithfully imitate in our GUI utilities what our CLI utilities
+     * can't be prevented from doing.
+     *
+     * When I investigated this, at first glance the rules appeared to
+     * be:
      *
      *  - Single quotes are not special characters.
      *