[u/mdw/putty] / pageant.c

/*
 * Pageant: the PuTTY Authentication Agent.
 */

#include <windows.h>
#include <aclapi.h>
#include <stdio.h> /* FIXME */
#include "putty.h" /* FIXME */
#include "ssh.h"
#include "tree234.h"

#define IDI_MAINICON 200
#define IDI_TRAYICON 201

#define WM_XUSER     (WM_USER + 0x2000)
#define WM_SYSTRAY   (WM_XUSER + 6)
#define WM_SYSTRAY2  (WM_XUSER + 7)

#define AGENT_COPYDATA_ID 0x804e50ba   /* random goop */

/*
 * FIXME: maybe some day we can sort this out ...
 */
#define AGENT_MAX_MSGLEN  8192

#define IDM_CLOSE    0x0010
#define IDM_VIEWKEYS 0x0020

#define APPNAME "Pageant"

#define SSH_AGENTC_REQUEST_RSA_IDENTITIES    1
#define SSH_AGENT_RSA_IDENTITIES_ANSWER      2
#define SSH_AGENTC_RSA_CHALLENGE             3
#define SSH_AGENT_RSA_RESPONSE               4
#define SSH_AGENT_FAILURE                    5
#define SSH_AGENT_SUCCESS                    6
#define SSH_AGENTC_ADD_RSA_IDENTITY          7
#define SSH_AGENTC_REMOVE_RSA_IDENTITY       8

HINSTANCE instance;
HWND hwnd;
HWND keylist;
HMENU systray_menu;

tree234 *rsakeys;

int has_security;
typedef DWORD (WINAPI *gsi_fn_t)
    (HANDLE, SE_OBJECT_TYPE, SECURITY_INFORMATION,
                                 PSID *, PSID *, PACL *, PACL *,
                                 PSECURITY_DESCRIPTOR *);
gsi_fn_t getsecurityinfo;

/*
 * We need this to link with the RSA code, because rsaencrypt()
 * pads its data with random bytes. Since we only use rsadecrypt(),
 * which is deterministic, this should never be called.
 *
 * If it _is_ called, there is a _serious_ problem, because it
 * won't generate true random numbers. So we must scream, panic,
 * and exit immediately if that should happen.
 */
int random_byte(void) {
    MessageBox(hwnd, "Internal Error", APPNAME, MB_OK | MB_ICONERROR);
    exit(0);
}

/*
 * This function is needed to link with the DES code. We need not
 * have it do anything at all.
 */
void logevent(char *msg) {
}

#define GET_32BIT(cp) \
    (((unsigned long)(unsigned char)(cp)[0] << 24) | \
    ((unsigned long)(unsigned char)(cp)[1] << 16) | \
    ((unsigned long)(unsigned char)(cp)[2] << 8) | \
    ((unsigned long)(unsigned char)(cp)[3]))

#define PUT_32BIT(cp, value) { \
    (cp)[0] = (unsigned char)((value) >> 24); \
    (cp)[1] = (unsigned char)((value) >> 16); \
    (cp)[2] = (unsigned char)((value) >> 8); \
    (cp)[3] = (unsigned char)(value); }

#define PASSPHRASE_MAXLEN 512

/*
 * Dialog-box function for the passphrase box.
 */
static int CALLBACK PassphraseProc(HWND hwnd, UINT msg,
                                   WPARAM wParam, LPARAM lParam) {
    static char *passphrase;

    switch (msg) {
      case WM_INITDIALOG:
        passphrase = (char *)lParam;
        *passphrase = 0;
        return 0;
      case WM_COMMAND:
	switch (LOWORD(wParam)) {
	  case IDOK:
	    if (*passphrase)
		EndDialog (hwnd, 1);
	    else
		MessageBeep (0);
	    return 0;
	  case IDCANCEL:
	    EndDialog (hwnd, 0);
	    return 0;
          case 102:                    /* edit box */
	    if (HIWORD(wParam) == EN_CHANGE) {
                GetDlgItemText (hwnd, 102, passphrase, PASSPHRASE_MAXLEN-1);
                passphrase[PASSPHRASE_MAXLEN-1] = '\0';
            }
            return 0;
	}
	return 0;
      case WM_CLOSE:
	EndDialog (hwnd, 0);
	return 0;
    }
    return 0;
}

/*
 * This function loads a key from a file and adds it.
 */
void add_keyfile(char *filename) {
    char passphrase[PASSPHRASE_MAXLEN];
    struct RSAKey *key;
    int needs_pass;
    int ret;
    int attempts;

    /* FIXME: we can acquire comment here and use it in dialog */
    needs_pass = rsakey_encrypted(filename, NULL);
    attempts = 0;
    key = malloc(sizeof(*key));
    do {
        if (needs_pass) {
            int dlgret;
            dlgret = DialogBoxParam(instance, MAKEINTRESOURCE(210),
                                    NULL, PassphraseProc,
                                    (LPARAM)passphrase);
            if (!dlgret) {
                free(key);
                return;                /* operation cancelled */
            }
        } else
            *passphrase = '\0';
        ret = loadrsakey(filename, key, passphrase);
        attempts++;
    } while (ret == -1);
    if (ret == 0) {
        MessageBox(NULL, "Couldn't load public key.", APPNAME,
                   MB_OK | MB_ICONERROR);
        free(key);
        return;
    }
    if (add234(rsakeys, key) != key)
        free(key);                     /* already present, don't waste RAM */
}

/*
 * This is the main agent function that answers messages.
 */
void answer_msg(void *msg) {
    unsigned char *p = msg;
    unsigned char *ret = msg;
    int type;

    /*
     * Get the message type.
     */
    type = p[4];

    p += 5;
    switch (type) {
      case SSH_AGENTC_REQUEST_RSA_IDENTITIES:
        /*
         * Reply with SSH_AGENT_RSA_IDENTITIES_ANSWER.
         */
        {
            enum234 e;
            struct RSAKey *key;
            int len, nkeys;

            /*
             * Count up the number and length of keys we hold.
             */
            len = nkeys = 0;
            for (key = first234(rsakeys, &e); key; key = next234(&e)) {
                nkeys++;
                len += 4;              /* length field */
                len += ssh1_bignum_length(key->exponent);
                len += ssh1_bignum_length(key->modulus);
                len += 4 + strlen(key->comment);
            }

            /*
             * Packet header is the obvious five bytes, plus four
             * bytes for the key count.
             */
            len += 5 + 4;
            if (len > AGENT_MAX_MSGLEN)
                goto failure;          /* aaargh! too much stuff! */
            PUT_32BIT(ret, len-4);
            ret[4] = SSH_AGENT_RSA_IDENTITIES_ANSWER;
            PUT_32BIT(ret+5, nkeys);
            p = ret + 5 + 4;
            for (key = first234(rsakeys, &e); key; key = next234(&e)) {
                PUT_32BIT(p, ssh1_bignum_bitcount(key->modulus));
                p += 4;
                p += ssh1_write_bignum(p, key->exponent);
                p += ssh1_write_bignum(p, key->modulus);
                PUT_32BIT(p, strlen(key->comment));
                memcpy(p+4, key->comment, strlen(key->comment));
                p += 4 + strlen(key->comment);
            }
        }
        break;
      case SSH_AGENTC_RSA_CHALLENGE:
        /*
         * Reply with either SSH_AGENT_RSA_RESPONSE or
         * SSH_AGENT_FAILURE, depending on whether we have that key
         * or not.
         */
        {
            struct RSAKey reqkey, *key;
            Bignum challenge, response;
            unsigned char response_source[48], response_md5[16];
            struct MD5Context md5c;
            int i, len;

            p += 4;
            p += ssh1_read_bignum(p, &reqkey.exponent);
            p += ssh1_read_bignum(p, &reqkey.modulus);
            p += ssh1_read_bignum(p, &challenge);
            memcpy(response_source+32, p, 16); p += 16;
            if (GET_32BIT(p) != 1 ||
                (key = find234(rsakeys, &reqkey, NULL)) == NULL) {
                freebn(reqkey.exponent);
                freebn(reqkey.modulus);
                freebn(challenge);
                goto failure;
            }
            response = rsadecrypt(challenge, key);
            for (i = 0; i < 32; i++)
                response_source[i] = bignum_byte(response, 31-i);

            MD5Init(&md5c);
            MD5Update(&md5c, response_source, 48);
            MD5Final(response_md5, &md5c);
            memset(response_source, 0, 48);   /* burn the evidence */
            freebn(response);          /* and that evidence */
            freebn(challenge);         /* yes, and that evidence */
            freebn(reqkey.exponent);   /* and free some memory ... */
            freebn(reqkey.modulus);    /* ... while we're at it. */

            /*
             * Packet is the obvious five byte header, plus sixteen
             * bytes of MD5.
             */
            len = 5 + 16;
            PUT_32BIT(ret, len-4);
            ret[4] = SSH_AGENT_RSA_RESPONSE;
            memcpy(ret+5, response_md5, 16);
        }
        break;
#if 0 /* FIXME: implement these */
      case SSH_AGENTC_ADD_RSA_IDENTITY:
        /*
         * Add to the list and return SSH_AGENT_SUCCESS, or
         * SSH_AGENT_FAILURE if the key was malformed.
         */
        break;
      case SSH_AGENTC_REMOVE_RSA_IDENTITY:
        /*
         * Remove from the list and return SSH_AGENT_SUCCESS, or
         * perhaps SSH_AGENT_FAILURE if it wasn't in the list to
         * start with.
         */
        break;
#endif
      default:
        failure:
        /*
         * Unrecognised message. Return SSH_AGENT_FAILURE.
         */
        PUT_32BIT(ret, 1);
        ret[4] = SSH_AGENT_FAILURE;
        break;
    }
}

/*
 * Key comparison function for the 2-3-4 tree of RSA keys.
 */
int cmpkeys(void *av, void *bv) {
    struct RSAKey *a = (struct RSAKey *)av;
    struct RSAKey *b = (struct RSAKey *)bv;
    Bignum am, bm;
    int alen, blen;

    am = a->modulus;
    bm = b->modulus;
    /*
     * Compare by length of moduli.
     */
    alen = ssh1_bignum_bitcount(am);
    blen = ssh1_bignum_bitcount(bm);
    if (alen > blen) return +1; else if (alen < blen) return -1;
    /*
     * Now compare by moduli themselves.
     */
    alen = (alen + 7) / 8;             /* byte count */
    while (alen-- > 0) {
        int abyte, bbyte;
        abyte = bignum_byte(am, alen);
        bbyte = bignum_byte(bm, alen);
        if (abyte > bbyte) return +1; else if (abyte < bbyte) return -1;
    }
    /*
     * Give up.
     */
    return 0;
}

static void error(char *s) {
    MessageBox(hwnd, s, APPNAME, MB_OK | MB_ICONERROR);
}

/*
 * Dialog-box function for the key list box.
 */
static int CALLBACK KeyListProc(HWND hwnd, UINT msg,
                                WPARAM wParam, LPARAM lParam) {
    enum234 e;
    struct RSAKey *key;
    OPENFILENAME of;
    char filename[FILENAME_MAX];

    switch (msg) {
      case WM_INITDIALOG:
        for (key = first234(rsakeys, &e); key; key = next234(&e)) {
            SendDlgItemMessage (hwnd, 100, LB_ADDSTRING,
                                0, (LPARAM) key->comment);
        }
        return 0;
      case WM_COMMAND:
	switch (LOWORD(wParam)) {
	  case IDOK:
	  case IDCANCEL:
            keylist = NULL;
            DestroyWindow(hwnd);
            return 0;
          case 101:                    /* add key */
	    if (HIWORD(wParam) == BN_CLICKED ||
		HIWORD(wParam) == BN_DOUBLECLICKED) {
                memset(&of, 0, sizeof(of));
#ifdef OPENFILENAME_SIZE_VERSION_400
                of.lStructSize = OPENFILENAME_SIZE_VERSION_400;
#else
                of.lStructSize = sizeof(of);
#endif
                of.hwndOwner = hwnd;
                of.lpstrFilter = "All Files\0*\0\0\0";
                of.lpstrCustomFilter = NULL;
                of.nFilterIndex = 1;
                of.lpstrFile = filename; *filename = '\0';
                of.nMaxFile = sizeof(filename);
                of.lpstrFileTitle = NULL;
                of.lpstrInitialDir = NULL;
                of.lpstrTitle = "Select Public Key File";
                of.Flags = 0;
                if (GetOpenFileName(&of)) {
                    add_keyfile(filename);
                }
                SendDlgItemMessage(hwnd, 100, LB_RESETCONTENT, 0, 0);
                for (key = first234(rsakeys, &e); key; key = next234(&e)) {
                    SendDlgItemMessage (hwnd, 100, LB_ADDSTRING,
                                        0, (LPARAM) key->comment);
                }
		SendDlgItemMessage (hwnd, 100, LB_SETCURSEL, (WPARAM) -1, 0);
            }
            return 0;
          case 102:                    /* remove key */
	    if (HIWORD(wParam) == BN_CLICKED ||
		HIWORD(wParam) == BN_DOUBLECLICKED) {
		int n = SendDlgItemMessage (hwnd, 100, LB_GETCURSEL, 0, 0);
		if (n == LB_ERR || n == 0) {
		    MessageBeep(0);
		    break;
		}
                for (key = first234(rsakeys, &e); key; key = next234(&e))
                    if (n-- == 0)
                        break;
                del234(rsakeys, key);
                freersakey(key); free(key);
                SendDlgItemMessage(hwnd, 100, LB_RESETCONTENT, 0, 0);
                for (key = first234(rsakeys, &e); key; key = next234(&e)) {
                    SendDlgItemMessage (hwnd, 100, LB_ADDSTRING,
                                        0, (LPARAM) key->comment);
                }
		SendDlgItemMessage (hwnd, 100, LB_SETCURSEL, (WPARAM) -1, 0);
            }
            return 0;
	}
	return 0;
      case WM_CLOSE:
        keylist = NULL;
        DestroyWindow(hwnd);
	return 0;
    }
    return 0;
}

static LRESULT CALLBACK WndProc (HWND hwnd, UINT message,
                                 WPARAM wParam, LPARAM lParam) {
    int ret;
    static int menuinprogress;

    switch (message) {
      case WM_SYSTRAY:
        if (lParam == WM_RBUTTONUP) {
            POINT cursorpos;
            GetCursorPos(&cursorpos);
            PostMessage(hwnd, WM_SYSTRAY2, cursorpos.x, cursorpos.y);
        } else if (lParam == WM_LBUTTONDBLCLK) {
            /* Equivalent to IDM_VIEWKEYS. */
            PostMessage(hwnd, WM_COMMAND, IDM_VIEWKEYS, 0);
        }
        break;
      case WM_SYSTRAY2:
        if (!menuinprogress) {
            menuinprogress = 1;
            SetForegroundWindow(hwnd);
            ret = TrackPopupMenu(systray_menu,
                                 TPM_RIGHTALIGN | TPM_BOTTOMALIGN |
                                 TPM_RIGHTBUTTON,
                                 wParam, lParam, 0, hwnd, NULL);
            menuinprogress = 0;
        }
        break;
      case WM_COMMAND:
      case WM_SYSCOMMAND:
	switch (wParam & ~0xF) {       /* low 4 bits reserved to Windows */
          case IDM_CLOSE:
            SendMessage(hwnd, WM_CLOSE, 0, 0);
            break;
          case IDM_VIEWKEYS:
            if (!keylist) {
                keylist = CreateDialog (instance, MAKEINTRESOURCE(211),
                                        NULL, KeyListProc);
                ShowWindow (keylist, SW_SHOWNORMAL);
                /* 
                 * Sometimes the window comes up minimised / hidden
                 * for no obvious reason. Prevent this.
                 */
                SetForegroundWindow(keylist);
                SetWindowPos (keylist, HWND_TOP, 0, 0, 0, 0,
                              SWP_NOMOVE | SWP_NOSIZE | SWP_SHOWWINDOW);
            }
            break;
        }
        break;
      case WM_DESTROY:
	PostQuitMessage (0);
	return 0;
      case WM_COPYDATA:
        {
            COPYDATASTRUCT *cds;
            char *mapname;
            void *p;
            HANDLE filemap, proc;
            PSID mapowner, procowner;
            PSECURITY_DESCRIPTOR psd1 = NULL, psd2 = NULL;
            int ret = 0;

            cds = (COPYDATASTRUCT *)lParam;
            if (cds->dwData != AGENT_COPYDATA_ID)
                return 0;              /* not our message, mate */
            mapname = (char *)cds->lpData;
            if (mapname[cds->cbData - 1] != '\0')
                return 0;              /* failure to be ASCIZ! */
#ifdef DEBUG_IPC
            debug(("mapname is :%s:\r\n", mapname));
#endif
            filemap = OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, mapname);
#ifdef DEBUG_IPC
            debug(("filemap is %p\r\n", filemap));
#endif
            if (filemap != NULL && filemap != INVALID_HANDLE_VALUE) {
                int rc;
                if (has_security) {
                    if ((proc = OpenProcess(MAXIMUM_ALLOWED, FALSE,
                                            GetCurrentProcessId())) == NULL) {
#ifdef DEBUG_IPC
                        debug(("couldn't get handle for process\r\n"));
#endif
                        return 0;
                    }
                    if (getsecurityinfo(proc, SE_KERNEL_OBJECT,
                                        OWNER_SECURITY_INFORMATION,
                                        &procowner, NULL, NULL, NULL,
                                        &psd2) != ERROR_SUCCESS) {
#ifdef DEBUG_IPC
                        debug(("couldn't get owner info for process\r\n"));
#endif
                        CloseHandle(proc);
                        return 0;          /* unable to get security info */
                    }
                    CloseHandle(proc);
                    if ((rc = getsecurityinfo(filemap, SE_KERNEL_OBJECT,
                                              OWNER_SECURITY_INFORMATION,
                                              &mapowner, NULL, NULL, NULL,
                                              &psd1) != ERROR_SUCCESS)) {
#ifdef DEBUG_IPC
                        debug(("couldn't get owner info for filemap: %d\r\n", rc));
#endif
                        return 0;
                    }
#ifdef DEBUG_IPC
                    debug(("got security stuff\r\n"));
#endif
                    if (!EqualSid(mapowner, procowner))
                        return 0;          /* security ID mismatch! */
#ifdef DEBUG_IPC
                    debug(("security stuff matched\r\n"));
#endif
                    LocalFree(psd1);
                    LocalFree(psd2);
                } else {
#ifdef DEBUG_IPC
                    debug(("security APIs not present\r\n"));
#endif
                }
                p = MapViewOfFile(filemap, FILE_MAP_WRITE, 0, 0, 0);
#ifdef DEBUG_IPC
                debug(("p is %p\r\n", p));
                {int i; for(i=0;i<5;i++)debug(("p[%d]=%02x\r\n", i, ((unsigned char *)p)[i]));}
#endif
                answer_msg(p);
                ret = 1;
                UnmapViewOfFile(p);
            }
            CloseHandle(filemap);
            return ret;
        }
    }

    return DefWindowProc (hwnd, message, wParam, lParam);
}

int WINAPI WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmdline, int show) {
    WNDCLASS wndclass;
    MSG msg;
    OSVERSIONINFO osi;
    HMODULE advapi;

    /*
     * Determine whether we're an NT system (should have security
     * APIs) or a non-NT system (don't do security).
     */
    memset(&osi, 0, sizeof(OSVERSIONINFO));
    osi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
    if (GetVersionEx(&osi) && osi.dwPlatformId==VER_PLATFORM_WIN32_NT) {
        has_security = TRUE;
    } else
        has_security = FALSE;

    if (has_security) {
        /*
         * Attempt to ge the security API we need.
         */
        advapi = LoadLibrary("ADVAPI32.DLL");
        getsecurityinfo = (gsi_fn_t)GetProcAddress(advapi, "GetSecurityInfo");
        if (!getsecurityinfo) {
            MessageBox(NULL,
                       "Unable to access security APIs. Pageant will\n"
                       "not run, in case it causes a security breach.",
                       "Pageant Fatal Error", MB_ICONERROR | MB_OK);
            return 1;
        }
    } else
        advapi = NULL;

    /*
     * First bomb out totally if we are already running.
     */
    if (FindWindow("Pageant", "Pageant")) {
        MessageBox(NULL, "Pageant is already running", "Pageant Error",
                   MB_ICONERROR | MB_OK);
        if (advapi) FreeLibrary(advapi);
        return 0;
    }

    instance = inst;

    if (!prev) {
	wndclass.style         = 0;
	wndclass.lpfnWndProc   = WndProc;
	wndclass.cbClsExtra    = 0;
	wndclass.cbWndExtra    = 0;
	wndclass.hInstance     = inst;
	wndclass.hIcon         = LoadIcon (inst,
					   MAKEINTRESOURCE(IDI_MAINICON));
	wndclass.hCursor       = LoadCursor (NULL, IDC_IBEAM);
	wndclass.hbrBackground = GetStockObject (BLACK_BRUSH);
	wndclass.lpszMenuName  = NULL;
	wndclass.lpszClassName = APPNAME;

	RegisterClass (&wndclass);
    }

    hwnd = keylist = NULL;

    hwnd = CreateWindow (APPNAME, APPNAME,
                         WS_OVERLAPPEDWINDOW | WS_VSCROLL,
                         CW_USEDEFAULT, CW_USEDEFAULT,
                         100, 100, NULL, NULL, inst, NULL);

    /* Set up a system tray icon */
    {
        BOOL res;
        NOTIFYICONDATA tnid;
        HICON hicon;

#ifdef NIM_SETVERSION
        tnid.uVersion = 0;
        res = Shell_NotifyIcon(NIM_SETVERSION, &tnid);
#endif

        tnid.cbSize = sizeof(NOTIFYICONDATA); 
        tnid.hWnd = hwnd; 
        tnid.uID = 1;                  /* unique within this systray use */
        tnid.uFlags = NIF_MESSAGE | NIF_ICON | NIF_TIP; 
        tnid.uCallbackMessage = WM_SYSTRAY;
        tnid.hIcon = hicon = LoadIcon (instance, MAKEINTRESOURCE(201));
        strcpy(tnid.szTip, "Pageant (PuTTY authentication agent)");

        res = Shell_NotifyIcon(NIM_ADD, &tnid); 

        if (hicon) 
            DestroyIcon(hicon); 

        systray_menu = CreatePopupMenu();
        AppendMenu (systray_menu, MF_ENABLED, IDM_VIEWKEYS, "&View Keys");
        AppendMenu (systray_menu, MF_ENABLED, IDM_CLOSE, "E&xit");
    }

    ShowWindow (hwnd, SW_HIDE);

    /*
     * Initialise storage for RSA keys.
     */
    rsakeys = newtree234(cmpkeys);

    /*
     * Process the command line and add RSA keys as listed on it.
     */
    {
        char *p;
        int inquotes = 0;
        p = cmdline;
        while (*p) {
            while (*p && isspace(*p)) p++;
            if (*p && !isspace(*p)) {
                char *q = p, *pp = p;
                while (*p && (inquotes || !isspace(*p)))
                {
                    if (*p == '"') {
                        inquotes = !inquotes;
                        p++;
                        continue;
                    }
                    *pp++ = *p++;
                }
                if (*pp) {
                    if (*p) p++;
                    *pp++ = '\0';
                }
                add_keyfile(q);
            }
        }
    }

    /*
     * Main message loop.
     */
    while (GetMessage(&msg, NULL, 0, 0) == 1) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    /* Clean up the system tray icon */
    {
        NOTIFYICONDATA tnid;

        tnid.cbSize = sizeof(NOTIFYICONDATA); 
        tnid.hWnd = hwnd;
        tnid.uID = 1;

        Shell_NotifyIcon(NIM_DELETE, &tnid); 

        DestroyMenu(systray_menu);
    }

    if (advapi) FreeLibrary(advapi);
    exit(msg.wParam);
}
Commit	Line	Data
5c58ad2d	1	/*
	2	* Pageant: the PuTTY Authentication Agent.
	3	*/
	4
	5	#include <windows.h>
d70f60ae	6	#include <aclapi.h>
5c58ad2d	7	#include <stdio.h> /* FIXME */
	8	#include "putty.h" /* FIXME */
	9	#include "ssh.h"
	10	#include "tree234.h"
	11
	12	#define IDI_MAINICON 200
	13	#define IDI_TRAYICON 201
	14
	15	#define WM_XUSER (WM_USER + 0x2000)
	16	#define WM_SYSTRAY (WM_XUSER + 6)
	17	#define WM_SYSTRAY2 (WM_XUSER + 7)
d70f60ae	18
	19	#define AGENT_COPYDATA_ID 0x804e50ba /* random goop */
	20
	21	/*
	22	* FIXME: maybe some day we can sort this out ...
	23	*/
	24	#define AGENT_MAX_MSGLEN 8192
5c58ad2d	25
	26	#define IDM_CLOSE 0x0010
	27	#define IDM_VIEWKEYS 0x0020
	28
	29	#define APPNAME "Pageant"
	30
5c58ad2d	31	#define SSH_AGENTC_REQUEST_RSA_IDENTITIES 1
	32	#define SSH_AGENT_RSA_IDENTITIES_ANSWER 2
	33	#define SSH_AGENTC_RSA_CHALLENGE 3
	34	#define SSH_AGENT_RSA_RESPONSE 4
	35	#define SSH_AGENT_FAILURE 5
	36	#define SSH_AGENT_SUCCESS 6
	37	#define SSH_AGENTC_ADD_RSA_IDENTITY 7
	38	#define SSH_AGENTC_REMOVE_RSA_IDENTITY 8
	39
	40	HINSTANCE instance;
	41	HWND hwnd;
	42	HWND keylist;
	43	HMENU systray_menu;
	44
	45	tree234 *rsakeys;
	46
016ef8ab	47	int has_security;
	48	typedef DWORD (WINAPI *gsi_fn_t)
	49	(HANDLE, SE_OBJECT_TYPE, SECURITY_INFORMATION,
	50	PSID , PSID , PACL , PACL ,
	51	PSECURITY_DESCRIPTOR *);
	52	gsi_fn_t getsecurityinfo;
	53
5c58ad2d	54	/*
	55	* We need this to link with the RSA code, because rsaencrypt()
	56	* pads its data with random bytes. Since we only use rsadecrypt(),
	57	* which is deterministic, this should never be called.
	58	*
	59	* If it _is_ called, there is a _serious_ problem, because it
	60	* won't generate true random numbers. So we must scream, panic,
	61	* and exit immediately if that should happen.
	62	*/
	63	int random_byte(void) {
	64	MessageBox(hwnd, "Internal Error", APPNAME, MB_OK \| MB_ICONERROR);
	65	exit(0);
	66	}
	67
	68	/*
	69	* This function is needed to link with the DES code. We need not
	70	* have it do anything at all.
	71	*/
	72	void logevent(char *msg) {
	73	}
	74
	75	#define GET_32BIT(cp) \
	76	(((unsigned long)(unsigned char)(cp)[0] << 24) \| \
	77	((unsigned long)(unsigned char)(cp)[1] << 16) \| \
	78	((unsigned long)(unsigned char)(cp)[2] << 8) \| \
	79	((unsigned long)(unsigned char)(cp)[3]))
	80
	81	#define PUT_32BIT(cp, value) { \
	82	(cp)[0] = (unsigned char)((value) >> 24); \
	83	(cp)[1] = (unsigned char)((value) >> 16); \
	84	(cp)[2] = (unsigned char)((value) >> 8); \
	85	(cp)[3] = (unsigned char)(value); }
	86
	87	#define PASSPHRASE_MAXLEN 512
	88
	89	/*
	90	* Dialog-box function for the passphrase box.
	91	*/
	92	static int CALLBACK PassphraseProc(HWND hwnd, UINT msg,
	93	WPARAM wParam, LPARAM lParam) {
	94	static char *passphrase;
	95
	96	switch (msg) {
	97	case WM_INITDIALOG:
	98	passphrase = (char *)lParam;
	99	*passphrase = 0;
	100	return 0;
	101	case WM_COMMAND:
	102	switch (LOWORD(wParam)) {
	103	case IDOK:
	104	if (*passphrase)
	105	EndDialog (hwnd, 1);
	106	else
	107	MessageBeep (0);
	108	return 0;
	109	case IDCANCEL:
	110	EndDialog (hwnd, 0);
	111	return 0;
	112	case 102: /* edit box */
	113	if (HIWORD(wParam) == EN_CHANGE) {
	114	GetDlgItemText (hwnd, 102, passphrase, PASSPHRASE_MAXLEN-1);
	115	passphrase[PASSPHRASE_MAXLEN-1] = '\0';
	116	}
	117	return 0;
118	}
119	return 0;
120	case WM_CLOSE:
121	EndDialog (hwnd, 0);
122	return 0;
123	}
124	return 0;
125	}
126
127	/*
128	* This function loads a key from a file and adds it.
129	*/
130	void add_keyfile(char *filename) {
131	char passphrase[PASSPHRASE_MAXLEN];
132	struct RSAKey *key;
133	int needs_pass;
134	int ret;
135	int attempts;
136
a52f067e	137	/* FIXME: we can acquire comment here and use it in dialog */
a52f067e	138	needs_pass = rsakey_encrypted(filename, NULL);
5c58ad2d	139	attempts = 0;
	140	key = malloc(sizeof(*key));
	141	do {
	142	if (needs_pass) {
	143	int dlgret;
	144	dlgret = DialogBoxParam(instance, MAKEINTRESOURCE(210),
	145	NULL, PassphraseProc,
	146	(LPARAM)passphrase);
	147	if (!dlgret) {
	148	free(key);
	149	return; /* operation cancelled */
	150	}
	151	} else
	152	*passphrase = '\0';
	153	ret = loadrsakey(filename, key, passphrase);
	154	attempts++;
	155	} while (ret == -1);
	156	if (ret == 0) {
	157	MessageBox(NULL, "Couldn't load public key.", APPNAME,
	158	MB_OK \| MB_ICONERROR);
	159	free(key);
	160	return;
	161	}
	162	if (add234(rsakeys, key) != key)
	163	free(key); /* already present, don't waste RAM */
	164	}
	165
	166	/*
	167	* This is the main agent function that answers messages.
	168	*/
d70f60ae	169	void answer_msg(void *msg) {
	170	unsigned char *p = msg;
	171	unsigned char *ret = msg;
5c58ad2d	172	int type;
5c58ad2d	173
5c58ad2d	174	/*
	175	* Get the message type.
	176	*/
	177	type = p[4];
	178
	179	p += 5;
5c58ad2d	180	switch (type) {
	181	case SSH_AGENTC_REQUEST_RSA_IDENTITIES:
	182	/*
	183	* Reply with SSH_AGENT_RSA_IDENTITIES_ANSWER.
	184	*/
	185	{
	186	enum234 e;
	187	struct RSAKey *key;
	188	int len, nkeys;
	189
	190	/*
	191	* Count up the number and length of keys we hold.
	192	*/
	193	len = nkeys = 0;
	194	for (key = first234(rsakeys, &e); key; key = next234(&e)) {
	195	nkeys++;
	196	len += 4; /* length field */
	197	len += ssh1_bignum_length(key->exponent);
	198	len += ssh1_bignum_length(key->modulus);
	199	len += 4 + strlen(key->comment);
	200	}
	201
	202	/*
	203	* Packet header is the obvious five bytes, plus four
	204	* bytes for the key count.
	205	*/
	206	len += 5 + 4;
d70f60ae	207	if (len > AGENT_MAX_MSGLEN)
	208	goto failure; /* aaargh! too much stuff! */
	209	PUT_32BIT(ret, len-4);
	210	ret[4] = SSH_AGENT_RSA_IDENTITIES_ANSWER;
	211	PUT_32BIT(ret+5, nkeys);
	212	p = ret + 5 + 4;
	213	for (key = first234(rsakeys, &e); key; key = next234(&e)) {
	214	PUT_32BIT(p, ssh1_bignum_bitcount(key->modulus));
	215	p += 4;
	216	p += ssh1_write_bignum(p, key->exponent);
	217	p += ssh1_write_bignum(p, key->modulus);
	218	PUT_32BIT(p, strlen(key->comment));
	219	memcpy(p+4, key->comment, strlen(key->comment));
	220	p += 4 + strlen(key->comment);
5c58ad2d	221	}
	222	}
	223	break;
	224	case SSH_AGENTC_RSA_CHALLENGE:
	225	/*
	226	* Reply with either SSH_AGENT_RSA_RESPONSE or
	227	* SSH_AGENT_FAILURE, depending on whether we have that key
	228	* or not.
	229	*/
	230	{
	231	struct RSAKey reqkey, *key;
	232	Bignum challenge, response;
	233	unsigned char response_source[48], response_md5[16];
	234	struct MD5Context md5c;
	235	int i, len;
	236
	237	p += 4;
	238	p += ssh1_read_bignum(p, &reqkey.exponent);
	239	p += ssh1_read_bignum(p, &reqkey.modulus);
	240	p += ssh1_read_bignum(p, &challenge);
	241	memcpy(response_source+32, p, 16); p += 16;
	242	if (GET_32BIT(p) != 1 \|\|
	243	(key = find234(rsakeys, &reqkey, NULL)) == NULL) {
	244	freebn(reqkey.exponent);
	245	freebn(reqkey.modulus);
	246	freebn(challenge);
	247	goto failure;
	248	}
	249	response = rsadecrypt(challenge, key);
	250	for (i = 0; i < 32; i++)
	251	response_source[i] = bignum_byte(response, 31-i);
	252
	253	MD5Init(&md5c);
	254	MD5Update(&md5c, response_source, 48);
	255	MD5Final(response_md5, &md5c);
	256	memset(response_source, 0, 48); /* burn the evidence */
	257	freebn(response); /* and that evidence */
	258	freebn(challenge); /* yes, and that evidence */
	259	freebn(reqkey.exponent); /* and free some memory ... */
	260	freebn(reqkey.modulus); /* ... while we're at it. */
	261
	262	/*
	263	* Packet is the obvious five byte header, plus sixteen
	264	* bytes of MD5.
	265	*/
	266	len = 5 + 16;
d70f60ae	267	PUT_32BIT(ret, len-4);
	268	ret[4] = SSH_AGENT_RSA_RESPONSE;
	269	memcpy(ret+5, response_md5, 16);
5c58ad2d	270	}
	271	break;
	272	#if 0 /* FIXME: implement these */
	273	case SSH_AGENTC_ADD_RSA_IDENTITY:
	274	/*
	275	* Add to the list and return SSH_AGENT_SUCCESS, or
	276	* SSH_AGENT_FAILURE if the key was malformed.
	277	*/
	278	break;
	279	case SSH_AGENTC_REMOVE_RSA_IDENTITY:
	280	/*
	281	* Remove from the list and return SSH_AGENT_SUCCESS, or
	282	* perhaps SSH_AGENT_FAILURE if it wasn't in the list to
	283	* start with.
	284	*/
	285	break;
	286	#endif
	287	default:
	288	failure:
	289	/*
	290	* Unrecognised message. Return SSH_AGENT_FAILURE.
	291	*/
d70f60ae	292	PUT_32BIT(ret, 1);
d70f60ae	293	ret[4] = SSH_AGENT_FAILURE;
5c58ad2d	294	break;
5c58ad2d	295	}
5c58ad2d	296	}
	297
	298	/*
	299	* Key comparison function for the 2-3-4 tree of RSA keys.
	300	*/
	301	int cmpkeys(void av, void bv) {
	302	struct RSAKey a = (struct RSAKey )av;
	303	struct RSAKey b = (struct RSAKey )bv;
	304	Bignum am, bm;
	305	int alen, blen;
	306
	307	am = a->modulus;
	308	bm = b->modulus;
	309	/*
	310	* Compare by length of moduli.
	311	*/
	312	alen = ssh1_bignum_bitcount(am);
	313	blen = ssh1_bignum_bitcount(bm);
	314	if (alen > blen) return +1; else if (alen < blen) return -1;
	315	/*
	316	* Now compare by moduli themselves.
	317	*/
	318	alen = (alen + 7) / 8; /* byte count */
	319	while (alen-- > 0) {
	320	int abyte, bbyte;
	321	abyte = bignum_byte(am, alen);
	322	bbyte = bignum_byte(bm, alen);
	323	if (abyte > bbyte) return +1; else if (abyte < bbyte) return -1;
	324	}
	325	/*
	326	* Give up.
	327	*/
	328	return 0;
	329	}
	330
	331	static void error(char *s) {
	332	MessageBox(hwnd, s, APPNAME, MB_OK \| MB_ICONERROR);
	333	}
	334
	335	/*
	336	* Dialog-box function for the key list box.
	337	*/
	338	static int CALLBACK KeyListProc(HWND hwnd, UINT msg,
	339	WPARAM wParam, LPARAM lParam) {
	340	enum234 e;
	341	struct RSAKey *key;
	342	OPENFILENAME of;
	343	char filename[FILENAME_MAX];
	344
	345	switch (msg) {
	346	case WM_INITDIALOG:
	347	for (key = first234(rsakeys, &e); key; key = next234(&e)) {
	348	SendDlgItemMessage (hwnd, 100, LB_ADDSTRING,
	349	0, (LPARAM) key->comment);
	350	}
	351	return 0;
	352	case WM_COMMAND:
	353	switch (LOWORD(wParam)) {
	354	case IDOK:
	355	case IDCANCEL:
	356	keylist = NULL;
	357	DestroyWindow(hwnd);
	358	return 0;
	359	case 101: /* add key */
360	if (HIWORD(wParam) == BN_CLICKED \|\|
361	HIWORD(wParam) == BN_DOUBLECLICKED) {
362	memset(&of, 0, sizeof(of));
363	#ifdef OPENFILENAME_SIZE_VERSION_400
364	of.lStructSize = OPENFILENAME_SIZE_VERSION_400;
365	#else
366	of.lStructSize = sizeof(of);
367	#endif
368	of.hwndOwner = hwnd;
369	of.lpstrFilter = "All Files\0*\0\0\0";
370	of.lpstrCustomFilter = NULL;
371	of.nFilterIndex = 1;
372	of.lpstrFile = filename; *filename = '\0';
373	of.nMaxFile = sizeof(filename);
374	of.lpstrFileTitle = NULL;
375	of.lpstrInitialDir = NULL;
376	of.lpstrTitle = "Select Public Key File";
377	of.Flags = 0;
378	if (GetOpenFileName(&of)) {
379	add_keyfile(filename);
380	}
381	SendDlgItemMessage(hwnd, 100, LB_RESETCONTENT, 0, 0);
382	for (key = first234(rsakeys, &e); key; key = next234(&e)) {
383	SendDlgItemMessage (hwnd, 100, LB_ADDSTRING,
384	0, (LPARAM) key->comment);
385	}
386	SendDlgItemMessage (hwnd, 100, LB_SETCURSEL, (WPARAM) -1, 0);
387	}
388	return 0;
389	case 102: /* remove key */
390	if (HIWORD(wParam) == BN_CLICKED \|\|
391	HIWORD(wParam) == BN_DOUBLECLICKED) {
392	int n = SendDlgItemMessage (hwnd, 100, LB_GETCURSEL, 0, 0);
393	if (n == LB_ERR \|\| n == 0) {
394	MessageBeep(0);
395	break;
396	}
397	for (key = first234(rsakeys, &e); key; key = next234(&e))
398	if (n-- == 0)
399	break;
400	del234(rsakeys, key);
401	freersakey(key); free(key);
402	SendDlgItemMessage(hwnd, 100, LB_RESETCONTENT, 0, 0);
403	for (key = first234(rsakeys, &e); key; key = next234(&e)) {
404	SendDlgItemMessage (hwnd, 100, LB_ADDSTRING,
405	0, (LPARAM) key->comment);
406	}
407	SendDlgItemMessage (hwnd, 100, LB_SETCURSEL, (WPARAM) -1, 0);
408	}
409	return 0;
410	}
411	return 0;
412	case WM_CLOSE:
413	keylist = NULL;
414	DestroyWindow(hwnd);
415	return 0;
416	}
417	return 0;
418	}
419
420	static LRESULT CALLBACK WndProc (HWND hwnd, UINT message,
421	WPARAM wParam, LPARAM lParam) {
422	int ret;
423	static int menuinprogress;
424
425	switch (message) {
426	case WM_SYSTRAY:
427	if (lParam == WM_RBUTTONUP) {
428	POINT cursorpos;
429	GetCursorPos(&cursorpos);
430	PostMessage(hwnd, WM_SYSTRAY2, cursorpos.x, cursorpos.y);
905beba5	431	} else if (lParam == WM_LBUTTONDBLCLK) {
	432	/* Equivalent to IDM_VIEWKEYS. */
	433	PostMessage(hwnd, WM_COMMAND, IDM_VIEWKEYS, 0);
5c58ad2d	434	}
	435	break;
	436	case WM_SYSTRAY2:
	437	if (!menuinprogress) {
	438	menuinprogress = 1;
	439	SetForegroundWindow(hwnd);
	440	ret = TrackPopupMenu(systray_menu,
	441	TPM_RIGHTALIGN \| TPM_BOTTOMALIGN \|
	442	TPM_RIGHTBUTTON,
	443	wParam, lParam, 0, hwnd, NULL);
	444	menuinprogress = 0;
	445	}
	446	break;
	447	case WM_COMMAND:
	448	case WM_SYSCOMMAND:
	449	switch (wParam & ~0xF) { /* low 4 bits reserved to Windows */
	450	case IDM_CLOSE:
	451	SendMessage(hwnd, WM_CLOSE, 0, 0);
	452	break;
	453	case IDM_VIEWKEYS:
	454	if (!keylist) {
	455	keylist = CreateDialog (instance, MAKEINTRESOURCE(211),
	456	NULL, KeyListProc);
	457	ShowWindow (keylist, SW_SHOWNORMAL);
905beba5	458	/*
	459	* Sometimes the window comes up minimised / hidden
	460	* for no obvious reason. Prevent this.
	461	*/
	462	SetForegroundWindow(keylist);
	463	SetWindowPos (keylist, HWND_TOP, 0, 0, 0, 0,
	464	SWP_NOMOVE \| SWP_NOSIZE \| SWP_SHOWWINDOW);
5c58ad2d	465	}
	466	break;
	467	}
	468	break;
	469	case WM_DESTROY:
	470	PostQuitMessage (0);
	471	return 0;
	472	case WM_COPYDATA:
	473	{
	474	COPYDATASTRUCT *cds;
d70f60ae	475	char *mapname;
	476	void *p;
	477	HANDLE filemap, proc;
	478	PSID mapowner, procowner;
	479	PSECURITY_DESCRIPTOR psd1 = NULL, psd2 = NULL;
	480	int ret = 0;
5c58ad2d	481
5c58ad2d	482	cds = (COPYDATASTRUCT *)lParam;
d70f60ae	483	if (cds->dwData != AGENT_COPYDATA_ID)
	484	return 0; /* not our message, mate */
	485	mapname = (char *)cds->lpData;
	486	if (mapname[cds->cbData - 1] != '\0')
	487	return 0; /* failure to be ASCIZ! */
	488	#ifdef DEBUG_IPC
	489	debug(("mapname is :%s:\r\n", mapname));
	490	#endif
	491	filemap = OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, mapname);
	492	#ifdef DEBUG_IPC
	493	debug(("filemap is %p\r\n", filemap));
	494	#endif
	495	if (filemap != NULL && filemap != INVALID_HANDLE_VALUE) {
	496	int rc;
016ef8ab	497	if (has_security) {
	498	if ((proc = OpenProcess(MAXIMUM_ALLOWED, FALSE,
	499	GetCurrentProcessId())) == NULL) {
d70f60ae	500	#ifdef DEBUG_IPC
016ef8ab	501	debug(("couldn't get handle for process\r\n"));
d70f60ae	502	#endif
016ef8ab	503	return 0;
	504	}
	505	if (getsecurityinfo(proc, SE_KERNEL_OBJECT,
	506	OWNER_SECURITY_INFORMATION,
	507	&procowner, NULL, NULL, NULL,
	508	&psd2) != ERROR_SUCCESS) {
d70f60ae	509	#ifdef DEBUG_IPC
016ef8ab	510	debug(("couldn't get owner info for process\r\n"));
d70f60ae	511	#endif
016ef8ab	512	CloseHandle(proc);
	513	return 0; /* unable to get security info */
	514	}
d70f60ae	515	CloseHandle(proc);
016ef8ab	516	if ((rc = getsecurityinfo(filemap, SE_KERNEL_OBJECT,
	517	OWNER_SECURITY_INFORMATION,
	518	&mapowner, NULL, NULL, NULL,
	519	&psd1) != ERROR_SUCCESS)) {
d70f60ae	520	#ifdef DEBUG_IPC
016ef8ab	521	debug(("couldn't get owner info for filemap: %d\r\n", rc));
d70f60ae	522	#endif
016ef8ab	523	return 0;
	524	}
	525	#ifdef DEBUG_IPC
	526	debug(("got security stuff\r\n"));
	527	#endif
	528	if (!EqualSid(mapowner, procowner))
	529	return 0; /* security ID mismatch! */
d70f60ae	530	#ifdef DEBUG_IPC
016ef8ab	531	debug(("security stuff matched\r\n"));
d70f60ae	532	#endif
016ef8ab	533	LocalFree(psd1);
	534	LocalFree(psd2);
	535	} else {
d70f60ae	536	#ifdef DEBUG_IPC
016ef8ab	537	debug(("security APIs not present\r\n"));
d70f60ae	538	#endif
016ef8ab	539	}
d70f60ae	540	p = MapViewOfFile(filemap, FILE_MAP_WRITE, 0, 0, 0);
	541	#ifdef DEBUG_IPC
	542	debug(("p is %p\r\n", p));
	543	{int i; for(i=0;i<5;i++)debug(("p[%d]=%02x\r\n", i, ((unsigned char *)p)[i]));}
	544	#endif
	545	answer_msg(p);
	546	ret = 1;
	547	UnmapViewOfFile(p);
	548	}
	549	CloseHandle(filemap);
	550	return ret;
5c58ad2d	551	}
5c58ad2d	552	}
	553
	554	return DefWindowProc (hwnd, message, wParam, lParam);
	555	}
	556
	557	int WINAPI WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmdline, int show) {
	558	WNDCLASS wndclass;
5c58ad2d	559	MSG msg;
016ef8ab	560	OSVERSIONINFO osi;
	561	HMODULE advapi;
	562
	563	/*
	564	* Determine whether we're an NT system (should have security
	565	* APIs) or a non-NT system (don't do security).
	566	*/
	567	memset(&osi, 0, sizeof(OSVERSIONINFO));
	568	osi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
	569	if (GetVersionEx(&osi) && osi.dwPlatformId==VER_PLATFORM_WIN32_NT) {
	570	has_security = TRUE;
	571	} else
	572	has_security = FALSE;
	573
	574	if (has_security) {
	575	/*
	576	* Attempt to ge the security API we need.
	577	*/
	578	advapi = LoadLibrary("ADVAPI32.DLL");
	579	getsecurityinfo = (gsi_fn_t)GetProcAddress(advapi, "GetSecurityInfo");
	580	if (!getsecurityinfo) {
	581	MessageBox(NULL,
	582	"Unable to access security APIs. Pageant will\n"
	583	"not run, in case it causes a security breach.",
	584	"Pageant Fatal Error", MB_ICONERROR \| MB_OK);
	585	return 1;
	586	}
	587	} else
	588	advapi = NULL;
5c58ad2d	589
2faac2e1	590	/*
	591	* First bomb out totally if we are already running.
	592	*/
	593	if (FindWindow("Pageant", "Pageant")) {
	594	MessageBox(NULL, "Pageant is already running", "Pageant Error",
	595	MB_ICONERROR \| MB_OK);
016ef8ab	596	if (advapi) FreeLibrary(advapi);
2faac2e1	597	return 0;
	598	}
	599
5c58ad2d	600	instance = inst;
	601
	602	if (!prev) {
	603	wndclass.style = 0;
	604	wndclass.lpfnWndProc = WndProc;
	605	wndclass.cbClsExtra = 0;
	606	wndclass.cbWndExtra = 0;
	607	wndclass.hInstance = inst;
	608	wndclass.hIcon = LoadIcon (inst,
	609	MAKEINTRESOURCE(IDI_MAINICON));
	610	wndclass.hCursor = LoadCursor (NULL, IDC_IBEAM);
	611	wndclass.hbrBackground = GetStockObject (BLACK_BRUSH);
	612	wndclass.lpszMenuName = NULL;
	613	wndclass.lpszClassName = APPNAME;
	614
	615	RegisterClass (&wndclass);
	616	}
	617
	618	hwnd = keylist = NULL;
	619
	620	hwnd = CreateWindow (APPNAME, APPNAME,
	621	WS_OVERLAPPEDWINDOW \| WS_VSCROLL,
	622	CW_USEDEFAULT, CW_USEDEFAULT,
	623	100, 100, NULL, NULL, inst, NULL);
	624
	625	/* Set up a system tray icon */
	626	{
	627	BOOL res;
	628	NOTIFYICONDATA tnid;
	629	HICON hicon;
	630
	631	#ifdef NIM_SETVERSION
	632	tnid.uVersion = 0;
	633	res = Shell_NotifyIcon(NIM_SETVERSION, &tnid);
	634	#endif
	635
	636	tnid.cbSize = sizeof(NOTIFYICONDATA);
	637	tnid.hWnd = hwnd;
	638	tnid.uID = 1; /* unique within this systray use */
	639	tnid.uFlags = NIF_MESSAGE \| NIF_ICON \| NIF_TIP;
	640	tnid.uCallbackMessage = WM_SYSTRAY;
	641	tnid.hIcon = hicon = LoadIcon (instance, MAKEINTRESOURCE(201));
	642	strcpy(tnid.szTip, "Pageant (PuTTY authentication agent)");
	643
	644	res = Shell_NotifyIcon(NIM_ADD, &tnid);
	645
	646	if (hicon)
	647	DestroyIcon(hicon);
	648
	649	systray_menu = CreatePopupMenu();
70acd63f	650	AppendMenu (systray_menu, MF_ENABLED, IDM_VIEWKEYS, "&View Keys");
70acd63f	651	AppendMenu (systray_menu, MF_ENABLED, IDM_CLOSE, "E&xit");
5c58ad2d	652	}
	653
	654	ShowWindow (hwnd, SW_HIDE);
	655
	656	/*
dacbd0e8	657	* Initialise storage for RSA keys.
	658	*/
	659	rsakeys = newtree234(cmpkeys);
	660
	661	/*
	662	* Process the command line and add RSA keys as listed on it.
5c58ad2d	663	*/
5c58ad2d	664	{
8c42f28c	665	char *p;
	666	int inquotes = 0;
	667	p = cmdline;
dacbd0e8	668	while (*p) {
	669	while (p && isspace(p)) p++;
	670	if (p && !isspace(p)) {
8c42f28c	671	char q = p, pp = p;
	672	while (p && (inquotes \|\| !isspace(p)))
	673	{
	674	if (*p == '"') {
	675	inquotes = !inquotes;
	676	p++;
	677	continue;
	678	}
	679	pp++ = p++;
	680	}
	681	if (*pp) {
	682	if (*p) p++;
	683	*pp++ = '\0';
	684	}
dacbd0e8	685	add_keyfile(q);
	686	}
	687	}
5c58ad2d	688	}
	689
	690	/*
dacbd0e8	691	* Main message loop.
5c58ad2d	692	*/
5c58ad2d	693	while (GetMessage(&msg, NULL, 0, 0) == 1) {
	694	TranslateMessage(&msg);
	695	DispatchMessage(&msg);
	696	}
	697
	698	/* Clean up the system tray icon */
	699	{
	700	NOTIFYICONDATA tnid;
	701
	702	tnid.cbSize = sizeof(NOTIFYICONDATA);
	703	tnid.hWnd = hwnd;
	704	tnid.uID = 1;
	705
	706	Shell_NotifyIcon(NIM_DELETE, &tnid);
	707
	708	DestroyMenu(systray_menu);
	709	}
	710
016ef8ab	711	if (advapi) FreeLibrary(advapi);
5c58ad2d	712	exit(msg.wParam);
5c58ad2d	713	}