/* See LICENSE file for copyright and license details. */#include <ctype.h>#include <libconfig.h>#include <locale.h>#include <signal.h>#include <stdio.h>#include <stdlib.h>#include <string.h>#include <strings.h>#include <pwd.h>#include <time.h>#include <unistd.h> #include <X11/Xlib.h>#include <X11/Xatom.h>#include <X11/Xutil.h>#ifdef XINERAMA#include <X11/extensions/Xinerama.h>#endif#include <X11/Xft/Xft.h> #include "drw.h"#include "util.h" #include "pinentry/pinentry.h"#include "pinentry/memory.h" #define CONFIG_DIR "/.gnupg"#define CONFIG_FILE "/pinentry-dmenu.conf"#define INTERSECT(x, y, w, h, r) \		(MAX(0, MIN((x)+(w),(r).x_org+(r).width) - MAX((x),(r).x_org)) \		 && MAX(0, MIN((y)+(h),(r).y_org+(r).height) - MAX((y),(r).y_org)))#define LENGTH(X) (sizeof(X) / sizeof(X[0]))#define TEXTW(X) (drw_fontset_getwidth(drw, (X)) + lrpad)#define MINDESCLEN 8  enum { SchemePrompt, SchemeNormal, SchemeSelect, SchemeDesc, SchemeLast };enum { WinPin, WinConfirm };enum { Ok, NotOk, Cancel };enum { Nothing, Yes, No }; static int bh, mw, mh;static int sel;static int promptw, pdescw;/* Sum of left and right padding */static int lrpad;static size_t cursor;static int screen; static char* pin;static int pin_len;static char* pin_repeat;static int pin_repeat_len;static int repeat; static Atom clip, utf8;static Display *dpy;static Window root, parentwin, win;static XIC xic; static Drw *drw;static Clr *scheme[SchemeLast]; static int timed_out;static int winmode;pinentry_t pinentry_info; #include "config.h" static intdrawitem(const char* text, Bool sel, int x, int y, int w) {	unsigned int i = (sel) ? SchemeSelect : SchemeNormal; 	drw_setscheme(drw, scheme[i]); 	return drw_text(drw, x, y, w, bh, lrpad / 2, text, 0);} static voidgrabfocus(void) {	Window focuswin;	int i, revertwin; 	for (i = 0; i < 100; ++i) {		XGetInputFocus(dpy, &focuswin, &revertwin);		if (focuswin == win) {			return;		}		XSetInputFocus(dpy, win, RevertToParent, CurrentTime);		usleep(1000);	} 	die("cannot grab focus");} static voidgrabkeyboard(void) {	int i; 	if (embedded) {		return;	} 	/* Try to grab keyboard,	 * we may have to wait for another process to ungrab */	for (i = 0; i < 1000; i++) {		if (XGrabKeyboard(dpy, DefaultRootWindow(dpy), True, GrabModeAsync,		                  GrabModeAsync, CurrentTime) == GrabSuccess) {			return;		}		usleep(1000);	} 	die("cannot grab keyboard");} static size_tnextrune(int cursor, int inc) {	ssize_t n; 	/* Return location of next utf8 rune in the given direction (+1 or -1) */	for (n = cursor + inc;	     n + inc >= 0 && (pin[n] & 0xc0) == 0x80;	     n += inc); 	return n;} static voidsetup_pin(char* pin_ptr, int len, int reset) {	pin = pin_ptr;	pin_len = len; 	if (reset) {		promptw = (prompt) ? TEXTW(prompt) - lrpad / 4 : 0;		cursor = 0; 		if (pin) {			pin[0] = '\0';		}	}} static voidinsert(const char *str, ssize_t n) {	size_t len = strlen(pin); 	// FIXME: Pinentry crashes when increasing the pin buffer the second time.	//        Other pinentry programs has a limited passwort field length.	if (len + n > pin_len - 1) {		if (repeat) {			pin_repeat_len = 2 * pin_repeat_len;			pin_repeat = secmem_realloc(pin_repeat, pin_repeat_len);			setup_pin(pin_repeat, pin_repeat_len, 0);			if (!pin_repeat) {				pin_len = 0;			}		} else {			if (!pinentry_setbufferlen(pinentry_info, 2 * pinentry_info->pin_len)) {				pin_len = 0;			} else {				setup_pin(pinentry_info->pin, pinentry_info->pin_len, 0);			}		}		if (pin_len == 0) {			printf("Error: Couldn't allocate secure memory\n");			return;		}	} 	/* Move existing text out of the way, insert new text, and update cursor */	memmove(&pin[cursor + n], &pin[cursor], pin_len - cursor - MAX(n, 0)); 	if (n > 0) {		memcpy(&pin[cursor], str, n);	} 	cursor += n;	pin[len + n] = '\0';} static voiddrawwin(void) {	unsigned int curpos;	int x = 0, pb, pbw = 0, i;	size_t asterlen = strlen(asterisk);	size_t pdesclen;	int leftinput;	char* censort; 	char* pprompt = (repeat) ? pinentry_info->repeat_passphrase : pinentry_info->prompt;	int ppromptw = (pprompt) ? TEXTW(pprompt) : 0; 	unsigned int censortl = minpwlen * TEXTW(asterisk) / strlen(asterisk);	unsigned int confirml = TEXTW(" YesNo ") + 3 * lrpad; 	drw_setscheme(drw, scheme[SchemeNormal]);	drw_rect(drw, 0, 0, mw, mh, 1, 1); 	if (prompt) {		drw_setscheme(drw, scheme[SchemePrompt]);		x = drw_text(drw, x, 0, promptw, bh, lrpad / 2, prompt, 0);	} 	if (pprompt) {		drw_setscheme(drw, scheme[SchemePrompt]);		drw_text(drw, x, 0, ppromptw, bh, lrpad / 2, pprompt, 0);		x += ppromptw;	} 	if (pinentry_info->description) {		pb = mw - x;		pdesclen = strlen(pinentry_info->description); 		if (pb > 0) {			pb -= (winmode == WinPin) ? censortl : confirml;			pbw = MINDESCLEN * pdescw / pdesclen;			pbw = MIN(pbw, pdescw); 			if (pb >= pbw) {				pbw = MAX(pbw, pdescw);				pbw = MIN(pbw, pb);				pb = mw - pbw; 				for (i = 0; i < pdesclen; i++) {					if (pinentry_info->description[i] == '\n') {						pinentry_info->description[i] = ' ';					}				} 				drw_setscheme(drw, scheme[SchemeDesc]);				drw_text(drw, pb, 0, pbw, bh, lrpad / 2, pinentry_info->description,				         0);			} else {				pbw = 0;			}		}	} 	/* Draw input field */	drw_setscheme(drw, scheme[SchemeNormal]); 	if (winmode == WinPin) {		censort = ecalloc(1, asterlen * pin_len); 		for (i = 0; i < asterlen * strlen(pin); i += asterlen) {			memcpy(&censort[i], asterisk, asterlen);		} 		censort[i+1] = '\n';		leftinput = mw - x - pbw;		drw_text(drw, x, 0, leftinput, bh, lrpad / 2, censort, 0);		drw_font_getexts(drw->fonts, censort, cursor * asterlen, &curpos, NULL); 		if ((curpos += lrpad / 2 - 1) < leftinput) {			drw_setscheme(drw, scheme[SchemeNormal]);			drw_rect(drw, x + curpos, 2, 2, bh - 4, 1, 0);		} 		free(censort);	} else {		x += TEXTW(" ");		x = drawitem("No", (sel == No), x, 0, TEXTW("No"));		x = drawitem("Yes", (sel == Yes), x, 0, TEXTW("Yes"));	} 	drw_map(drw, win, 0, 0, mw, mh);} static voidsetup(void) {	int x, y, i = 0;	unsigned int du;	XSetWindowAttributes swa;	XIM xim;	Window w, dw, *dws;	XWindowAttributes wa;#ifdef XINERAMA	XineramaScreenInfo *info;	Window pw;	int a, j, di, n, area = 0;#endif 	/* Init appearance */	scheme[SchemePrompt] = drw_scm_create(drw, colors[SchemePrompt], 2);	scheme[SchemeNormal] = drw_scm_create(drw, colors[SchemeNormal], 2);	scheme[SchemeSelect] = drw_scm_create(drw, colors[SchemeSelect], 2);	scheme[SchemeDesc]   = drw_scm_create(drw, colors[SchemeDesc],   2); 	clip = XInternAtom(dpy, "CLIPBOARD",   False);	utf8 = XInternAtom(dpy, "UTF8_STRING", False); 	/* Calculate menu geometry */	bh = drw->fonts->h + 2;	mh = bh;#ifdef XINERAMA	info = XineramaQueryScreens(dpy, &n); 	if (parentwin == root && info) {		XGetInputFocus(dpy, &w, &di);		if (mon >= 0 && mon < n) {			i = mon;		} else if (w != root && w != PointerRoot && w != None) {			/* Find top-level window containing current input focus */			do {				if (XQueryTree(dpy, (pw = w), &dw, &w, &dws, &du) && dws) {					XFree(dws);				}			} while (w != root && w != pw);			/* Find xinerama screen with which the window intersects most */			if (XGetWindowAttributes(dpy, pw, &wa)) {				for (j = 0; j < n; j++) {					a = INTERSECT(wa.x, wa.y, wa.width, wa.height, info[j]);					if (a > area) {						area = a;						i = j;					}				}			}		}		/* No focused window is on screen, so use pointer location instead */		if (mon < 0 && !area		    && XQueryPointer(dpy, root, &dw, &dw, &x, &y, &di, &di, &du)) {			for (i = 0; i < n; i++) {				if (INTERSECT(x, y, 1, 1, info[i])) {					break;				}			}		} 		x = info[i].x_org;		y = info[i].y_org + (bottom ? info[i].height - mh : 0);		mw = info[i].width;		XFree(info);	} else#endif	{		if (!XGetWindowAttributes(dpy, parentwin, &wa)) {			die("could not get embedding window attributes: 0x%lx", parentwin);		}		x = 0;		y = bottom ? wa.height - mh : 0;		mw = wa.width;	} 	pdescw = (pinentry_info->description) ? TEXTW(pinentry_info->description) : 0; 	/* Create menu window */	swa.override_redirect = True;	swa.background_pixel = scheme[SchemePrompt][ColBg].pixel;	swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;	win = XCreateWindow(dpy, parentwin, x, y, mw, mh, 0,	                    CopyFromParent, CopyFromParent, CopyFromParent,	                    CWOverrideRedirect | CWBackPixel | CWEventMask, &swa); 	/* Open input methods */	xim = XOpenIM(dpy, NULL, NULL, NULL);	xic = XCreateIC(xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing,	                XNClientWindow, win, XNFocusWindow, win, NULL);	XMapRaised(dpy, win); 	if (embedded) {		XSelectInput(dpy, parentwin, FocusChangeMask); 		if (XQueryTree(dpy, parentwin, &dw, &w, &dws, &du) && dws) {			for (i = 0; i < du && dws[i] != win; ++i) {				XSelectInput(dpy, dws[i], FocusChangeMask);			} 			XFree(dws);		}		grabfocus();	} 	drw_resize(drw, mw, mh);} static voidcleanup(void) {	XUngrabKey(dpy, AnyKey, AnyModifier, root);	free(scheme[SchemeDesc]);	free(scheme[SchemeSelect]);	free(scheme[SchemeNormal]);	free(scheme[SchemePrompt]);	drw_free(drw);	XSync(dpy, False);	XCloseDisplay(dpy);} static intkeypress_confirm(XKeyEvent *ev, KeySym ksym) {	if (ev->state & ControlMask) {		switch(ksym) {		case XK_c:			pinentry_info->canceled = 1;			sel = No;			return 1;		default:			return 1;		}	} 	switch(ksym) {	case XK_KP_Enter:	case XK_Return:		if (sel != Nothing) {			return 1;		}		break;	case XK_y:	case XK_Y:		sel = Yes;		return 1;	case XK_n:	case XK_N:		sel = No;		return 1;	case XK_g:	case XK_G:	case XK_Escape:		pinentry_info->canceled = 1;		sel = No;		return 1;	case XK_h:	case XK_j:	case XK_Home:	case XK_Left:	case XK_Prior:	case XK_Up:		sel = No;		break;	case XK_k:	case XK_l:	case XK_Down:	case XK_End:	case XK_Next:	case XK_Right:		sel = Yes;		break;	} 	return 0;} static intkeypress_pin(XKeyEvent *ev, KeySym ksym, char* buf, int len) {	int old; 	if (ev->state & ControlMask) {		switch(ksym) {		case XK_a: ksym = XK_Home;      break;		case XK_b: ksym = XK_Left;      break;		case XK_c: ksym = XK_Escape;    break;		case XK_d: ksym = XK_Delete;    break;		case XK_e: ksym = XK_End;       break;		case XK_f: ksym = XK_Right;     break;		case XK_g: ksym = XK_Escape;    break;		case XK_h: ksym = XK_BackSpace; break;		case XK_k:			old = cursor;			cursor = strlen(pin);			insert(NULL, old - cursor);			break;		case XK_u:			insert(NULL, -cursor);			break;		case XK_v:			XConvertSelection(dpy, (ev->state & ShiftMask) ? clip : XA_PRIMARY,			                  utf8, utf8, win, CurrentTime);			return 0;		case XK_Return:		case XK_KP_Enter:			break;		case XK_bracketleft:			pinentry_info->canceled = 1;			return 1;		default:			return 1;		}	} 	switch(ksym) {	case XK_Delete:		if (pin[cursor] == '\0') {			return 0;		}		cursor = nextrune(cursor, +1);		/* Fallthrough */	case XK_BackSpace:		if (cursor == 0) {			return 0;		}		insert(NULL, nextrune(cursor, -1) - cursor);		break;	case XK_Escape:		pinentry_info->canceled = 1;		return 1;	case XK_Left:		if (cursor > 0) {

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