pinentry-dmenu.c

/* 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/Xproto.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/secmem.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 int bottom = 0,
           center = 0;

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 useargb = 0;
static Visual *visual;
static int depth;
static Colormap cmap;

static int timed_out;
static int winmode;
pinentry_t pinentry_info;

#include "config.h"

static void
xinitvisual(void) {
    XVisualInfo *infos;
    XRenderPictFormat *fmt;
    int nitems;
    int i;

    XVisualInfo tpl = {
        .screen = screen,
        .depth = 32,
        .class = TrueColor
    };
    long masks = VisualScreenMask | VisualDepthMask | VisualClassMask;

    infos = XGetVisualInfo(dpy, masks, &tpl, &nitems);
    visual = NULL;
    for(i = 0; i < nitems; i ++) {
        fmt = XRenderFindVisualFormat(dpy, infos[i].visual);
        if (fmt->type == PictTypeDirect && fmt->direct.alphaMask) {
            visual = infos[i].visual;
            depth = infos[i].depth;
            cmap = XCreateColormap(dpy, root, visual, AllocNone);
            useargb = 1;
            break;
        }
    }

    XFree(infos);

    if (! visual) {
        visual = DefaultVisual(dpy, screen);
        depth = DefaultDepth(dpy, screen);
        cmap = DefaultColormap(dpy, screen);
    }
}

static int
drawitem(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 void
grabfocus(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 void
grabkeyboard(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_t
nextrune(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 void
setup_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 void
insert(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 password 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 void
clear_string(char *str)
{
    int i;
    char *dest = str;

    /* remove new lines */
    for (i = 0; i < strlen(str); i++) {
        if (str[i] == '\n') {
            str[i] = ' ';
        }
    }

    /* remove multiple spaces */
    while (*str != '\0') {
        while (*str == ' ' && *(str + 1) == ' ')
            str++;

       *dest++ = *str++;
    }
    *dest = '\0';
}

static void
drawwin(void) {
    unsigned int curpos;
    int x = 0, pb, pbw = 0, fh = drw->fonts->h, 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 = (center) ? 0 : 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) {
        clear_string(pinentry_info->description);
        pdesclen = strlen(pinentry_info->description);
        pb = mw - x;

        if (pb > 0) {
            pb -= (winmode == WinPin) ? censortl : confirml;
            pbw = MIN(MINDESCLEN * pdescw / pdesclen, pdescw);

            if (pb >= pbw) {
                pbw = MIN(MAX(pbw, pdescw), pb);
                pb = mw - pbw;

                drw_setscheme(drw, scheme[SchemeDesc]);
                if (center) {
                    drw_text(drw, promptw + ppromptw, lineheight, centerwidth,
                        bh, lrpad / 2,
                        pinentry_info->description, 0);
                } else {
                    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 = (center) ? mw - x : 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 + (bh - fh) / 2, 2, fh - 4, 1, 0);
        }

        free(censort);
    } else {
        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 void
setup(void) {
    int x, y, i = 0, j;
    unsigned int du;
    XSetWindowAttributes swa;
    XIM xim;
    Window w, dw, *dws;
    XWindowAttributes wa;
    XClassHint ch = {"pinentry-dmenu", "prinentry-dmenu"};
#ifdef XINERAMA
    XineramaScreenInfo *info;
    Window pw;
    int a, di, n, area = 0;
#endif

    /* Init appearance */
    for (j = 0; j < SchemeLast; j++)
        scheme[j] = drw_scm_create(drw, colors[j], alphas[j], 2);

    clip = XInternAtom(dpy, "CLIPBOARD",   False);
    utf8 = XInternAtom(dpy, "UTF8_STRING", False);

    /* Calculate menu geometry */
    bh = MAX(drw->fonts->h + 2, lineheight);    /* at least line height */
    mh = bh + (borderwidth * 2);
#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;
                }
            }
        }

        if (center) {
            mw = MIN(centerwidth, info[i].width) - (borderwidth * 2);
            mh = (mh * 2) - (borderwidth * 2);
            x = info[i].x_org + ((info[i].width  - mw) / 2) - borderwidth;
            y = info[i].y_org + ((info[i].height - mh) / 2) - borderwidth;
        } else {
            x = info[i].x_org;
            y = info[i].y_org + (bottom ? info[i].height - mh : 0);
            mw = info[i].width - (borderwidth * 2);
        }

        XFree(info);
    } else
#endif
    {
        if (!XGetWindowAttributes(dpy, parentwin, &wa)) {
            die("could not get embedding window attributes: 0x%lx", parentwin);
        }

        if (center) {
            mw = MIN(centerwidth, wa.width) - (borderwidth * 2);
            mh = (mh * 2) - (borderwidth * 2);
            x = ((wa.width  - mw) / 2) - borderwidth;
            y = ((wa.height - mh) / 2) - borderwidth;
        } else {
            x = 0;
            y = bottom ? wa.height - mh : 0;
            mw = wa.width - (borderwidth * 2);
        }
    }

    pdescw = (pinentry_info->description) ? TEXTW(pinentry_info->description) : 0;

    /* Create menu window */
    swa.override_redirect = True;
    swa.background_pixel = 0;
    swa.border_pixel = 0;
    swa.colormap = cmap;
    swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
    win = XCreateWindow(dpy, parentwin, x, y, mw, mh - (borderwidth * 2),
                        borderwidth, depth, CopyFromParent, visual,
                        CWOverrideRedirect | CWBackPixel | CWBorderPixel | CWColormap | CWEventMask, &swa);
    if (borderwidth)
        XSetWindowBorder(dpy, win, scheme[SchemeSelect][ColBg].pixel);
    XSetClassHint(dpy, win, &ch);

    /* 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 void
cleanup(void) {
    size_t i;

    XUngrabKey(dpy, AnyKey, AnyModifier, root);
    for (i = 0; i < SchemeLast; i++)
        free(scheme[i]);
    drw_free(drw);
    XSync(dpy, False);
    XCloseDisplay(dpy);
}

static int
keypress_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 int
keypress_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) {
            cursor = nextrune(cursor, -1);
        }
        break;
    case XK_Right:
        if (pin[cursor] != '\0') {
            cursor = nextrune(cursor, +1);
        }
        break;
    case XK_Home:
        cursor = 0;
        break;
    case XK_End:
        cursor = strlen(pin);
        break;
    case XK_Return:
    case XK_KP_Enter:
        return 1;
        break;
    default:
        if (!iscntrl(*buf)) {
            insert(buf, len);
        }
    }

    return 0;
}

static int
keypress(XKeyEvent *ev) {
    char buf[32];
    int len;
    int ret = 1;

    KeySym ksym = NoSymbol;
    Status status;
    len = XmbLookupString(xic, ev, buf, sizeof(buf), &ksym, &status);

    if (status != XBufferOverflow) {
        if (winmode == WinConfirm) {
            ret = keypress_confirm(ev, ksym);
        } else {
            ret = keypress_pin(ev, ksym, buf, len);
        }

        if (ret == 0) {
            drawwin();
        }
    }

    return ret;
}

static void
paste(void) {
    char *p, *q;
    int di;
    unsigned long dl;
    Atom da;

    /* We have been given the current selection, now insert it into input */
    XGetWindowProperty(dpy, win, utf8, 0, pin_len / 4, False, utf8, &da, &di,
                        &dl, &dl, (unsigned char **)&p);
    insert(p, (q = strchr(p, '\n')) ? q - p : (ssize_t) strlen(p));
    XFree(p);
    drawwin();
}

void
run(void) {
    XEvent ev;

    drawwin();

    while (!XNextEvent(dpy, &ev)) {
        if (XFilterEvent(&ev, win)) {
            continue;
        }
        switch(ev.type) {
        case Expose:
            if (ev.xexpose.count == 0) {
                drw_map(drw, win, 0, 0, mw, mh);
            }
            break;
        case KeyPress:
            if (keypress(&ev.xkey)) {
                return;
            }
            break;
        case SelectionNotify:
            if (ev.xselection.property == utf8) {
                paste();
            }
            break;
        case VisibilityNotify:
            if (ev.xvisibility.state != VisibilityUnobscured) {
                XRaiseWindow(dpy, win);
            }
            break;
        }
    }
}

static void
catchsig(int sig) {
    if (sig == SIGALRM) {
        timed_out = 1;
    }
}

static void
password(void) {
    winmode = WinPin;
    repeat = 0;
    setup_pin(pinentry_info->pin, pinentry_info->pin_len, 1);
    run();

    if (!pinentry_info->canceled && pinentry_info->repeat_passphrase) {
        repeat = 1;
        pin_repeat_len = pinentry_info->pin_len;
        pin_repeat = secmem_malloc(pinentry_info->pin_len);
        setup_pin(pin_repeat, pin_repeat_len, 1);
        run();

        pinentry_info->repeat_okay = (strcmp(pinentry_info->pin, pin_repeat) == 0)? 1 : 0;
        secmem_free(pin_repeat);

        if (!pinentry_info->repeat_okay) {
            pinentry_info->result = -1;
            return;
        }
    }

    if (pinentry_info->canceled) {
        pinentry_info->result = -1;
        return;
    }

    pinentry_info->result = strlen(pinentry_info->pin);
}

static void
confirm(void) {
    winmode = WinConfirm;
    sel = Nothing;
    run();
    pinentry_info->result = sel != No;
}

static int
cmdhandler(pinentry_t received_pinentry) {
    struct sigaction sa;
    XWindowAttributes wa;

    pinentry_info = received_pinentry;

    if (!setlocale(LC_CTYPE, "") || !XSupportsLocale()) {
        fputs("warning: no locale support\n", stderr);
    }
    if (!(dpy = XOpenDisplay(pinentry_info->display))) {
        die("cannot open display");
    }
    screen = DefaultScreen(dpy);
    root = RootWindow(dpy, screen);
    embedded = (pinentry_info->parent_wid) ? embedded : 0;
    parentwin = (embedded) ? pinentry_info->parent_wid : root;
    if (!XGetWindowAttributes(dpy, parentwin, &wa)) {
        die("could not get embedding window attributes: 0x%lx", parentwin);
    }
    xinitvisual();
    drw = drw_create(dpy, screen, root, wa.width, wa.height, visual, depth, cmap);
    if (!drw_fontset_create(drw, fonts, LENGTH(fonts))) {
        die("no fonts could be loaded.");
    }
    lrpad = drw->fonts->h;
    drw_setscheme(drw, scheme[SchemePrompt]);

    if (pinentry_info->timeout) {
        memset(&sa, 0, sizeof(sa));
        sa.sa_handler = catchsig;
        sigaction(SIGALRM, &sa, NULL);
        alarm(pinentry_info->timeout);
    }

    grabkeyboard();
    setup();

    if (pinentry_info->pin) {
        do {
            password();
        } while (!pinentry_info->canceled && pinentry_info->repeat_passphrase
                && !pinentry_info->repeat_okay);
    } else {
        confirm();
    }

    cleanup();

    return pinentry_info->result;
}

pinentry_cmd_handler_t pinentry_cmd_handler = cmdhandler;

int
main(int argc, char *argv[]) {
    Bool bval;
    int i, val;
    const char *str;
    struct passwd *pw;
    char path[PATH_MAX];
    char *sudo_uid = getenv("SUDO_UID");
    char *home = getenv("HOME");
    char *gnupghome = getenv("GNUPGHOME");
    config_t cfg;

    if (gnupghome) {
        i = strlen(gnupghome);
        strcpy(path, gnupghome);
    } else {
        /* Get the home dir even if the user used sudo or logged in as root */
        if (sudo_uid) {
            i = atoi(sudo_uid);
            pw = getpwuid(i);
            home = pw->pw_dir;
        }

        i = strlen(home);
        strcpy(path, home);
        strcpy(&path[i], CONFIG_DIR);
        i += strlen(CONFIG_DIR);
    }

    strcpy(&path[i], CONFIG_FILE);
    endpwent();

    config_init(&cfg);

    /* Read the file. If there is an error, report it and exit. */
    if (config_read_file(&cfg, path)) {
        if (config_lookup_int(&cfg, "monitor", &val)) {
            mon = val;
        }
        if (config_lookup_int(&cfg, "center_width", &val)) {
            centerwidth = val;
        }
        if (config_lookup_bool(&cfg, "embedded", &bval)) {
            embedded = bval;
        }
        if (config_lookup_int(&cfg, "line_height", &val)) {
            lineheight = val;
        }
        if (config_lookup_int(&cfg, "border_width", &val)) {
            borderwidth = val;
        }
        if (config_lookup_int(&cfg, "prompt_fg_alpha", &val)) {
            alphas[SchemePrompt][0] = val;
        }
        if (config_lookup_int(&cfg, "prompt_bg_alpha", &val)) {
            alphas[SchemePrompt][1] = val;
        }
        if (config_lookup_int(&cfg, "normal_fg_alpha", &val)) {
            alphas[SchemeNormal][0] = val;
        }
        if (config_lookup_int(&cfg, "normal_bg_alpha", &val)) {
            alphas[SchemeNormal][1] = val;
        }
        if (config_lookup_int(&cfg, "select_fg_alpha", &val)) {
            alphas[SchemeSelect][0] = val;
        }
        if (config_lookup_int(&cfg, "select_bg_alpha", &val)) {
            alphas[SchemeSelect][1] = val;
        }
        if (config_lookup_int(&cfg, "desc_fg_alpha", &val)) {
            alphas[SchemeDesc][0] = val;
        }
        if (config_lookup_int(&cfg, "desc_bg_alpha", &val)) {
            alphas[SchemeDesc][1] = val;
        }
        if (config_lookup_string(&cfg, "position", &str)) {
            position = str;
        }
        if (config_lookup_string(&cfg, "font", &str)) {
            fonts[0] = str;
        }
        if (config_lookup_int(&cfg, "min_password_length", &val)) {
            minpwlen = val;
        }
        if (config_lookup_string(&cfg, "asterisk", &str)) {
            asterisk = str;
        }
        if (config_lookup_string(&cfg, "prompt", &str)) {
            prompt = str;
        }
        if (config_lookup_string(&cfg, "prompt_fg", &str)) {
            colors[SchemePrompt][ColFg] = str;
        }
        if (config_lookup_string(&cfg, "prompt_bg", &str)) {
            colors[SchemePrompt][ColBg] = str;
        }
        if (config_lookup_string(&cfg, "normal_fg", &str)) {
            colors[SchemeNormal][ColFg] = str;
        }
        if (config_lookup_string(&cfg, "normal_bg", &str)) {
            colors[SchemeNormal][ColBg] = str;
        }
        if (config_lookup_string(&cfg, "select_fg", &str)) {
            colors[SchemeSelect][ColFg] = str;
        }
        if (config_lookup_string(&cfg, "select_bg", &str)) {
            colors[SchemeSelect][ColBg] = str;
        }
        if (config_lookup_string(&cfg, "desc_fg", &str)) {
            colors[SchemeDesc][ColFg] = str;
        }
        if (config_lookup_string(&cfg, "desc_bg", &str)) {
            colors[SchemeDesc][ColBg] = str;
        }
    } else if ((str = config_error_file(&cfg))) {
        fprintf(stderr, "%s:%d: %s\n", config_error_file(&cfg),
                config_error_line(&cfg), config_error_text(&cfg));
        return(EXIT_FAILURE);
    }

    if (0 == strcmp(position, "center")) {
        center = 1;
        bottom = 0;
    }
    if (0 == strcmp(position, "bottom")) {
        center = 0;
        bottom = 1;
    }

    pinentry_init("pinentry-dmenu");
    pinentry_parse_opts(argc, argv);

    if (pinentry_loop()) {
        return 1;
    }

    config_destroy(&cfg);

    return 0;
}