[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

struct PassphraseProcStruct {
    char *passphrase;
    char *comment;
};

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

    switch (msg) {
      case WM_INITDIALOG:
        p = (struct PassphraseProcStruct *)lParam;
        passphrase = p->passphrase;
        if (p->comment)
            SetDlgItemText(hwnd, 101, p->comment);
        *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;
}

/*
 * Update the visible key list.
 */
void keylist_update(void) {
    struct RSAKey *key;
    enum234 e;

    if (keylist) {
        SendDlgItemMessage(keylist, 100, LB_RESETCONTENT, 0, 0);
        for (key = first234(rsakeys, &e); key; key = next234(&e)) {
            SendDlgItemMessage (keylist, 100, LB_ADDSTRING,
                                0, (LPARAM) key->comment);
        }
        SendDlgItemMessage (keylist, 100, LB_SETCURSEL, (WPARAM) -1, 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;
    char *comment;
    struct PassphraseProcStruct pps;

    needs_pass = rsakey_encrypted(filename, &comment);
    attempts = 0;
    key = malloc(sizeof(*key));
    pps.passphrase = passphrase;
    pps.comment = comment;
    do {
        if (needs_pass) {
            int dlgret;
            dlgret = DialogBoxParam(instance, MAKEINTRESOURCE(210),
                                    NULL, PassphraseProc,
                                    (LPARAM)&pps);
            if (!dlgret) {
                if (comment) free(comment);
                free(key);
                return;                /* operation cancelled */
            }
        } else
            *passphrase = '\0';
        ret = loadrsakey(filename, key, passphrase);
        attempts++;
    } while (ret == -1);
    if (comment) free(comment);
    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;
      case SSH_AGENTC_ADD_RSA_IDENTITY:
        /*
         * Add to the list and return SSH_AGENT_SUCCESS, or
         * SSH_AGENT_FAILURE if the key was malformed.
         */
        {
            struct RSAKey *key;
            char *comment;
            key = malloc(sizeof(struct RSAKey));
            memset(key, 0, sizeof(key));
            p += makekey(p, key, NULL, 1);
            p += makeprivate(p, key);
            p += ssh1_read_bignum(p, NULL);    /* p^-1 mod q */
            p += ssh1_read_bignum(p, NULL);    /* p */
            p += ssh1_read_bignum(p, NULL);    /* q */
            comment = malloc(GET_32BIT(p));
            if (comment) {
                memcpy(comment, p+4, GET_32BIT(p));
                key->comment = comment;
            }
            PUT_32BIT(ret, 1);
            ret[4] = SSH_AGENT_FAILURE;
            if (add234(rsakeys, key) == key) {
                keylist_update();
                ret[4] = SSH_AGENT_SUCCESS;
            } else {
                freersakey(key);
            }
        }
        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.
         */
        {
            struct RSAKey reqkey, *key;

            p += makekey(p, &reqkey, NULL, 0);
            key = find234(rsakeys, &reqkey, NULL);
            freebn(reqkey.exponent);
            freebn(reqkey.modulus);
            PUT_32BIT(ret, 1);
            ret[4] = SSH_AGENT_FAILURE;
            if (key) {
                del234(rsakeys, key);
                keylist_update();
                freersakey(key);
                ret[4] = SSH_AGENT_SUCCESS;
            }
        }
        break;
      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);
                    keylist_update();
                }
            }
            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
d4de2d2a	89	struct PassphraseProcStruct {
	90	char *passphrase;
	91	char *comment;
	92	};
	93
5c58ad2d	94	/*
	95	* Dialog-box function for the passphrase box.
	96	*/
	97	static int CALLBACK PassphraseProc(HWND hwnd, UINT msg,
	98	WPARAM wParam, LPARAM lParam) {
	99	static char *passphrase;
d4de2d2a	100	struct PassphraseProcStruct *p;
5c58ad2d	101
	102	switch (msg) {
	103	case WM_INITDIALOG:
d4de2d2a	104	p = (struct PassphraseProcStruct *)lParam;
	105	passphrase = p->passphrase;
	106	if (p->comment)
	107	SetDlgItemText(hwnd, 101, p->comment);
5c58ad2d	108	*passphrase = 0;
	109	return 0;
	110	case WM_COMMAND:
	111	switch (LOWORD(wParam)) {
	112	case IDOK:
	113	if (*passphrase)
	114	EndDialog (hwnd, 1);
	115	else
	116	MessageBeep (0);
	117	return 0;
	118	case IDCANCEL:
	119	EndDialog (hwnd, 0);
	120	return 0;
	121	case 102: /* edit box */
	122	if (HIWORD(wParam) == EN_CHANGE) {
	123	GetDlgItemText (hwnd, 102, passphrase, PASSPHRASE_MAXLEN-1);
	124	passphrase[PASSPHRASE_MAXLEN-1] = '\0';
	125	}
	126	return 0;
	127	}
	128	return 0;
	129	case WM_CLOSE:
	130	EndDialog (hwnd, 0);
	131	return 0;
	132	}
	133	return 0;
	134	}
	135
	136	/*
3c0b3d06	137	* Update the visible key list.
	138	*/
	139	void keylist_update(void) {
	140	struct RSAKey *key;
	141	enum234 e;
	142
	143	if (keylist) {
	144	SendDlgItemMessage(keylist, 100, LB_RESETCONTENT, 0, 0);
	145	for (key = first234(rsakeys, &e); key; key = next234(&e)) {
	146	SendDlgItemMessage (keylist, 100, LB_ADDSTRING,
	147	0, (LPARAM) key->comment);
	148	}
	149	SendDlgItemMessage (keylist, 100, LB_SETCURSEL, (WPARAM) -1, 0);
	150	}
	151	}
	152
	153	/*
5c58ad2d	154	* This function loads a key from a file and adds it.
	155	*/
	156	void add_keyfile(char *filename) {
	157	char passphrase[PASSPHRASE_MAXLEN];
	158	struct RSAKey *key;
	159	int needs_pass;
	160	int ret;
	161	int attempts;
d4de2d2a	162	char *comment;
d4de2d2a	163	struct PassphraseProcStruct pps;
5c58ad2d	164
d4de2d2a	165	needs_pass = rsakey_encrypted(filename, &comment);
5c58ad2d	166	attempts = 0;
5c58ad2d	167	key = malloc(sizeof(*key));
d4de2d2a	168	pps.passphrase = passphrase;
d4de2d2a	169	pps.comment = comment;
5c58ad2d	170	do {
	171	if (needs_pass) {
	172	int dlgret;
	173	dlgret = DialogBoxParam(instance, MAKEINTRESOURCE(210),
	174	NULL, PassphraseProc,
d4de2d2a	175	(LPARAM)&pps);
5c58ad2d	176	if (!dlgret) {
d4de2d2a	177	if (comment) free(comment);
5c58ad2d	178	free(key);
	179	return; /* operation cancelled */
	180	}
	181	} else
	182	*passphrase = '\0';
	183	ret = loadrsakey(filename, key, passphrase);
	184	attempts++;
	185	} while (ret == -1);
d4de2d2a	186	if (comment) free(comment);
5c58ad2d	187	if (ret == 0) {
	188	MessageBox(NULL, "Couldn't load public key.", APPNAME,
	189	MB_OK \| MB_ICONERROR);
	190	free(key);
	191	return;
	192	}
	193	if (add234(rsakeys, key) != key)
	194	free(key); /* already present, don't waste RAM */
	195	}
	196
	197	/*
	198	* This is the main agent function that answers messages.
	199	*/
d70f60ae	200	void answer_msg(void *msg) {
	201	unsigned char *p = msg;
	202	unsigned char *ret = msg;
5c58ad2d	203	int type;
5c58ad2d	204
5c58ad2d	205	/*
	206	* Get the message type.
	207	*/
	208	type = p[4];
	209
	210	p += 5;
5c58ad2d	211	switch (type) {
	212	case SSH_AGENTC_REQUEST_RSA_IDENTITIES:
	213	/*
	214	* Reply with SSH_AGENT_RSA_IDENTITIES_ANSWER.
	215	*/
	216	{
	217	enum234 e;
	218	struct RSAKey *key;
	219	int len, nkeys;
	220
	221	/*
	222	* Count up the number and length of keys we hold.
	223	*/
	224	len = nkeys = 0;
	225	for (key = first234(rsakeys, &e); key; key = next234(&e)) {
	226	nkeys++;
	227	len += 4; /* length field */
	228	len += ssh1_bignum_length(key->exponent);
	229	len += ssh1_bignum_length(key->modulus);
	230	len += 4 + strlen(key->comment);
	231	}
	232
	233	/*
	234	* Packet header is the obvious five bytes, plus four
	235	* bytes for the key count.
	236	*/
	237	len += 5 + 4;
d70f60ae	238	if (len > AGENT_MAX_MSGLEN)
	239	goto failure; /* aaargh! too much stuff! */
	240	PUT_32BIT(ret, len-4);
	241	ret[4] = SSH_AGENT_RSA_IDENTITIES_ANSWER;
	242	PUT_32BIT(ret+5, nkeys);
	243	p = ret + 5 + 4;
	244	for (key = first234(rsakeys, &e); key; key = next234(&e)) {
	245	PUT_32BIT(p, ssh1_bignum_bitcount(key->modulus));
	246	p += 4;
	247	p += ssh1_write_bignum(p, key->exponent);
	248	p += ssh1_write_bignum(p, key->modulus);
	249	PUT_32BIT(p, strlen(key->comment));
	250	memcpy(p+4, key->comment, strlen(key->comment));
	251	p += 4 + strlen(key->comment);
5c58ad2d	252	}
	253	}
	254	break;
	255	case SSH_AGENTC_RSA_CHALLENGE:
	256	/*
	257	* Reply with either SSH_AGENT_RSA_RESPONSE or
	258	* SSH_AGENT_FAILURE, depending on whether we have that key
	259	* or not.
	260	*/
	261	{
	262	struct RSAKey reqkey, *key;
	263	Bignum challenge, response;
	264	unsigned char response_source[48], response_md5[16];
	265	struct MD5Context md5c;
	266	int i, len;
	267
	268	p += 4;
	269	p += ssh1_read_bignum(p, &reqkey.exponent);
	270	p += ssh1_read_bignum(p, &reqkey.modulus);
	271	p += ssh1_read_bignum(p, &challenge);
	272	memcpy(response_source+32, p, 16); p += 16;
	273	if (GET_32BIT(p) != 1 \|\|
	274	(key = find234(rsakeys, &reqkey, NULL)) == NULL) {
	275	freebn(reqkey.exponent);
	276	freebn(reqkey.modulus);
	277	freebn(challenge);
	278	goto failure;
	279	}
	280	response = rsadecrypt(challenge, key);
	281	for (i = 0; i < 32; i++)
	282	response_source[i] = bignum_byte(response, 31-i);
	283
	284	MD5Init(&md5c);
	285	MD5Update(&md5c, response_source, 48);
	286	MD5Final(response_md5, &md5c);
	287	memset(response_source, 0, 48); /* burn the evidence */
	288	freebn(response); /* and that evidence */
	289	freebn(challenge); /* yes, and that evidence */
	290	freebn(reqkey.exponent); /* and free some memory ... */
	291	freebn(reqkey.modulus); /* ... while we're at it. */
	292
	293	/*
	294	* Packet is the obvious five byte header, plus sixteen
	295	* bytes of MD5.
	296	*/
	297	len = 5 + 16;
d70f60ae	298	PUT_32BIT(ret, len-4);
	299	ret[4] = SSH_AGENT_RSA_RESPONSE;
	300	memcpy(ret+5, response_md5, 16);
5c58ad2d	301	}
5c58ad2d	302	break;
5c58ad2d	303	case SSH_AGENTC_ADD_RSA_IDENTITY:
	304	/*
	305	* Add to the list and return SSH_AGENT_SUCCESS, or
	306	* SSH_AGENT_FAILURE if the key was malformed.
	307	*/
3c0b3d06	308	{
	309	struct RSAKey *key;
	310	char *comment;
	311	key = malloc(sizeof(struct RSAKey));
	312	memset(key, 0, sizeof(key));
	313	p += makekey(p, key, NULL, 1);
	314	p += makeprivate(p, key);
	315	p += ssh1_read_bignum(p, NULL); /* p^-1 mod q */
	316	p += ssh1_read_bignum(p, NULL); /* p */
	317	p += ssh1_read_bignum(p, NULL); /* q */
	318	comment = malloc(GET_32BIT(p));
	319	if (comment) {
	320	memcpy(comment, p+4, GET_32BIT(p));
	321	key->comment = comment;
	322	}
	323	PUT_32BIT(ret, 1);
	324	ret[4] = SSH_AGENT_FAILURE;
	325	if (add234(rsakeys, key) == key) {
	326	keylist_update();
	327	ret[4] = SSH_AGENT_SUCCESS;
	328	} else {
	329	freersakey(key);
	330	}
	331	}
5c58ad2d	332	break;
	333	case SSH_AGENTC_REMOVE_RSA_IDENTITY:
	334	/*
	335	* Remove from the list and return SSH_AGENT_SUCCESS, or
	336	* perhaps SSH_AGENT_FAILURE if it wasn't in the list to
	337	* start with.
	338	*/
3c0b3d06	339	{
	340	struct RSAKey reqkey, *key;
	341
	342	p += makekey(p, &reqkey, NULL, 0);
	343	key = find234(rsakeys, &reqkey, NULL);
	344	freebn(reqkey.exponent);
	345	freebn(reqkey.modulus);
	346	PUT_32BIT(ret, 1);
	347	ret[4] = SSH_AGENT_FAILURE;
	348	if (key) {
	349	del234(rsakeys, key);
	350	keylist_update();
d4de2d2a	351	freersakey(key);
3c0b3d06	352	ret[4] = SSH_AGENT_SUCCESS;
	353	}
	354	}
5c58ad2d	355	break;
5c58ad2d	356	default:
	357	failure:
	358	/*
	359	* Unrecognised message. Return SSH_AGENT_FAILURE.
	360	*/
d70f60ae	361	PUT_32BIT(ret, 1);
d70f60ae	362	ret[4] = SSH_AGENT_FAILURE;
5c58ad2d	363	break;
5c58ad2d	364	}
5c58ad2d	365	}
	366
	367	/*
	368	* Key comparison function for the 2-3-4 tree of RSA keys.
	369	*/
	370	int cmpkeys(void av, void bv) {
	371	struct RSAKey a = (struct RSAKey )av;
	372	struct RSAKey b = (struct RSAKey )bv;
	373	Bignum am, bm;
	374	int alen, blen;
	375
	376	am = a->modulus;
	377	bm = b->modulus;
	378	/*
	379	* Compare by length of moduli.
	380	*/
	381	alen = ssh1_bignum_bitcount(am);
	382	blen = ssh1_bignum_bitcount(bm);
	383	if (alen > blen) return +1; else if (alen < blen) return -1;
	384	/*
	385	* Now compare by moduli themselves.
	386	*/
	387	alen = (alen + 7) / 8; /* byte count */
	388	while (alen-- > 0) {
	389	int abyte, bbyte;
	390	abyte = bignum_byte(am, alen);
	391	bbyte = bignum_byte(bm, alen);
	392	if (abyte > bbyte) return +1; else if (abyte < bbyte) return -1;
	393	}
	394	/*
	395	* Give up.
	396	*/
	397	return 0;
	398	}
	399
	400	static void error(char *s) {
	401	MessageBox(hwnd, s, APPNAME, MB_OK \| MB_ICONERROR);
	402	}
	403
	404	/*
	405	* Dialog-box function for the key list box.
	406	*/
	407	static int CALLBACK KeyListProc(HWND hwnd, UINT msg,
	408	WPARAM wParam, LPARAM lParam) {
	409	enum234 e;
	410	struct RSAKey *key;
	411	OPENFILENAME of;
	412	char filename[FILENAME_MAX];
	413
	414	switch (msg) {
	415	case WM_INITDIALOG:
	416	for (key = first234(rsakeys, &e); key; key = next234(&e)) {
	417	SendDlgItemMessage (hwnd, 100, LB_ADDSTRING,
	418	0, (LPARAM) key->comment);
	419	}
	420	return 0;
	421	case WM_COMMAND:
	422	switch (LOWORD(wParam)) {
	423	case IDOK:
	424	case IDCANCEL:
	425	keylist = NULL;
	426	DestroyWindow(hwnd);
	427	return 0;
	428	case 101: /* add key */
429	if (HIWORD(wParam) == BN_CLICKED \|\|
430	HIWORD(wParam) == BN_DOUBLECLICKED) {
431	memset(&of, 0, sizeof(of));
432	#ifdef OPENFILENAME_SIZE_VERSION_400
433	of.lStructSize = OPENFILENAME_SIZE_VERSION_400;
434	#else
435	of.lStructSize = sizeof(of);
436	#endif
437	of.hwndOwner = hwnd;
438	of.lpstrFilter = "All Files\0*\0\0\0";
439	of.lpstrCustomFilter = NULL;
440	of.nFilterIndex = 1;
441	of.lpstrFile = filename; *filename = '\0';
442	of.nMaxFile = sizeof(filename);
443	of.lpstrFileTitle = NULL;
444	of.lpstrInitialDir = NULL;
445	of.lpstrTitle = "Select Public Key File";
446	of.Flags = 0;
447	if (GetOpenFileName(&of)) {
448	add_keyfile(filename);
3c0b3d06	449	keylist_update();
5c58ad2d	450	}
5c58ad2d	451	}
	452	return 0;
	453	case 102: /* remove key */
	454	if (HIWORD(wParam) == BN_CLICKED \|\|
	455	HIWORD(wParam) == BN_DOUBLECLICKED) {
	456	int n = SendDlgItemMessage (hwnd, 100, LB_GETCURSEL, 0, 0);
	457	if (n == LB_ERR \|\| n == 0) {
	458	MessageBeep(0);
	459	break;
	460	}
	461	for (key = first234(rsakeys, &e); key; key = next234(&e))
	462	if (n-- == 0)
	463	break;
	464	del234(rsakeys, key);
	465	freersakey(key); free(key);
	466	SendDlgItemMessage(hwnd, 100, LB_RESETCONTENT, 0, 0);
	467	for (key = first234(rsakeys, &e); key; key = next234(&e)) {
	468	SendDlgItemMessage (hwnd, 100, LB_ADDSTRING,
	469	0, (LPARAM) key->comment);
	470	}
	471	SendDlgItemMessage (hwnd, 100, LB_SETCURSEL, (WPARAM) -1, 0);
	472	}
	473	return 0;
	474	}
	475	return 0;
	476	case WM_CLOSE:
	477	keylist = NULL;
	478	DestroyWindow(hwnd);
	479	return 0;
	480	}
	481	return 0;
	482	}
	483
	484	static LRESULT CALLBACK WndProc (HWND hwnd, UINT message,
	485	WPARAM wParam, LPARAM lParam) {
	486	int ret;
	487	static int menuinprogress;
	488
	489	switch (message) {
	490	case WM_SYSTRAY:
	491	if (lParam == WM_RBUTTONUP) {
	492	POINT cursorpos;
	493	GetCursorPos(&cursorpos);
	494	PostMessage(hwnd, WM_SYSTRAY2, cursorpos.x, cursorpos.y);
905beba5	495	} else if (lParam == WM_LBUTTONDBLCLK) {
	496	/* Equivalent to IDM_VIEWKEYS. */
	497	PostMessage(hwnd, WM_COMMAND, IDM_VIEWKEYS, 0);
5c58ad2d	498	}
	499	break;
	500	case WM_SYSTRAY2:
	501	if (!menuinprogress) {
	502	menuinprogress = 1;
	503	SetForegroundWindow(hwnd);
	504	ret = TrackPopupMenu(systray_menu,
	505	TPM_RIGHTALIGN \| TPM_BOTTOMALIGN \|
	506	TPM_RIGHTBUTTON,
	507	wParam, lParam, 0, hwnd, NULL);
	508	menuinprogress = 0;
	509	}
	510	break;
	511	case WM_COMMAND:
	512	case WM_SYSCOMMAND:
	513	switch (wParam & ~0xF) { /* low 4 bits reserved to Windows */
	514	case IDM_CLOSE:
	515	SendMessage(hwnd, WM_CLOSE, 0, 0);
	516	break;
	517	case IDM_VIEWKEYS:
	518	if (!keylist) {
	519	keylist = CreateDialog (instance, MAKEINTRESOURCE(211),
	520	NULL, KeyListProc);
	521	ShowWindow (keylist, SW_SHOWNORMAL);
905beba5	522	/*
	523	* Sometimes the window comes up minimised / hidden
	524	* for no obvious reason. Prevent this.
	525	*/
	526	SetForegroundWindow(keylist);
	527	SetWindowPos (keylist, HWND_TOP, 0, 0, 0, 0,
	528	SWP_NOMOVE \| SWP_NOSIZE \| SWP_SHOWWINDOW);
5c58ad2d	529	}
	530	break;
	531	}
	532	break;
	533	case WM_DESTROY:
	534	PostQuitMessage (0);
	535	return 0;
	536	case WM_COPYDATA:
	537	{
	538	COPYDATASTRUCT *cds;
d70f60ae	539	char *mapname;
	540	void *p;
	541	HANDLE filemap, proc;
	542	PSID mapowner, procowner;
	543	PSECURITY_DESCRIPTOR psd1 = NULL, psd2 = NULL;
	544	int ret = 0;
5c58ad2d	545
5c58ad2d	546	cds = (COPYDATASTRUCT *)lParam;
d70f60ae	547	if (cds->dwData != AGENT_COPYDATA_ID)
	548	return 0; /* not our message, mate */
	549	mapname = (char *)cds->lpData;
	550	if (mapname[cds->cbData - 1] != '\0')
	551	return 0; /* failure to be ASCIZ! */
	552	#ifdef DEBUG_IPC
	553	debug(("mapname is :%s:\r\n", mapname));
	554	#endif
	555	filemap = OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, mapname);
	556	#ifdef DEBUG_IPC
	557	debug(("filemap is %p\r\n", filemap));
	558	#endif
	559	if (filemap != NULL && filemap != INVALID_HANDLE_VALUE) {
	560	int rc;
016ef8ab	561	if (has_security) {
	562	if ((proc = OpenProcess(MAXIMUM_ALLOWED, FALSE,
	563	GetCurrentProcessId())) == NULL) {
d70f60ae	564	#ifdef DEBUG_IPC
016ef8ab	565	debug(("couldn't get handle for process\r\n"));
d70f60ae	566	#endif
016ef8ab	567	return 0;
	568	}
	569	if (getsecurityinfo(proc, SE_KERNEL_OBJECT,
	570	OWNER_SECURITY_INFORMATION,
	571	&procowner, NULL, NULL, NULL,
	572	&psd2) != ERROR_SUCCESS) {
d70f60ae	573	#ifdef DEBUG_IPC
016ef8ab	574	debug(("couldn't get owner info for process\r\n"));
d70f60ae	575	#endif
016ef8ab	576	CloseHandle(proc);
	577	return 0; /* unable to get security info */
	578	}
d70f60ae	579	CloseHandle(proc);
016ef8ab	580	if ((rc = getsecurityinfo(filemap, SE_KERNEL_OBJECT,
	581	OWNER_SECURITY_INFORMATION,
	582	&mapowner, NULL, NULL, NULL,
	583	&psd1) != ERROR_SUCCESS)) {
d70f60ae	584	#ifdef DEBUG_IPC
016ef8ab	585	debug(("couldn't get owner info for filemap: %d\r\n", rc));
d70f60ae	586	#endif
016ef8ab	587	return 0;
	588	}
	589	#ifdef DEBUG_IPC
	590	debug(("got security stuff\r\n"));
	591	#endif
	592	if (!EqualSid(mapowner, procowner))
	593	return 0; /* security ID mismatch! */
d70f60ae	594	#ifdef DEBUG_IPC
016ef8ab	595	debug(("security stuff matched\r\n"));
d70f60ae	596	#endif
016ef8ab	597	LocalFree(psd1);
	598	LocalFree(psd2);
	599	} else {
d70f60ae	600	#ifdef DEBUG_IPC
016ef8ab	601	debug(("security APIs not present\r\n"));
d70f60ae	602	#endif
016ef8ab	603	}
d70f60ae	604	p = MapViewOfFile(filemap, FILE_MAP_WRITE, 0, 0, 0);
	605	#ifdef DEBUG_IPC
	606	debug(("p is %p\r\n", p));
	607	{int i; for(i=0;i<5;i++)debug(("p[%d]=%02x\r\n", i, ((unsigned char *)p)[i]));}
	608	#endif
	609	answer_msg(p);
	610	ret = 1;
	611	UnmapViewOfFile(p);
	612	}
	613	CloseHandle(filemap);
	614	return ret;
5c58ad2d	615	}
5c58ad2d	616	}
	617
	618	return DefWindowProc (hwnd, message, wParam, lParam);
	619	}
	620
	621	int WINAPI WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmdline, int show) {
	622	WNDCLASS wndclass;
5c58ad2d	623	MSG msg;
016ef8ab	624	OSVERSIONINFO osi;
	625	HMODULE advapi;
	626
	627	/*
	628	* Determine whether we're an NT system (should have security
	629	* APIs) or a non-NT system (don't do security).
	630	*/
	631	memset(&osi, 0, sizeof(OSVERSIONINFO));
	632	osi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
	633	if (GetVersionEx(&osi) && osi.dwPlatformId==VER_PLATFORM_WIN32_NT) {
	634	has_security = TRUE;
	635	} else
	636	has_security = FALSE;
	637
	638	if (has_security) {
	639	/*
	640	* Attempt to ge the security API we need.
	641	*/
	642	advapi = LoadLibrary("ADVAPI32.DLL");
	643	getsecurityinfo = (gsi_fn_t)GetProcAddress(advapi, "GetSecurityInfo");
	644	if (!getsecurityinfo) {
	645	MessageBox(NULL,
	646	"Unable to access security APIs. Pageant will\n"
	647	"not run, in case it causes a security breach.",
	648	"Pageant Fatal Error", MB_ICONERROR \| MB_OK);
	649	return 1;
	650	}
	651	} else
	652	advapi = NULL;
5c58ad2d	653
2faac2e1	654	/*
	655	* First bomb out totally if we are already running.
	656	*/
	657	if (FindWindow("Pageant", "Pageant")) {
	658	MessageBox(NULL, "Pageant is already running", "Pageant Error",
	659	MB_ICONERROR \| MB_OK);
016ef8ab	660	if (advapi) FreeLibrary(advapi);
2faac2e1	661	return 0;
	662	}
	663
5c58ad2d	664	instance = inst;
	665
	666	if (!prev) {
	667	wndclass.style = 0;
	668	wndclass.lpfnWndProc = WndProc;
	669	wndclass.cbClsExtra = 0;
	670	wndclass.cbWndExtra = 0;
	671	wndclass.hInstance = inst;
	672	wndclass.hIcon = LoadIcon (inst,
	673	MAKEINTRESOURCE(IDI_MAINICON));
	674	wndclass.hCursor = LoadCursor (NULL, IDC_IBEAM);
	675	wndclass.hbrBackground = GetStockObject (BLACK_BRUSH);
	676	wndclass.lpszMenuName = NULL;
	677	wndclass.lpszClassName = APPNAME;
	678
	679	RegisterClass (&wndclass);
	680	}
	681
	682	hwnd = keylist = NULL;
	683
	684	hwnd = CreateWindow (APPNAME, APPNAME,
	685	WS_OVERLAPPEDWINDOW \| WS_VSCROLL,
	686	CW_USEDEFAULT, CW_USEDEFAULT,
	687	100, 100, NULL, NULL, inst, NULL);
	688
	689	/* Set up a system tray icon */
	690	{
	691	BOOL res;
	692	NOTIFYICONDATA tnid;
	693	HICON hicon;
	694
	695	#ifdef NIM_SETVERSION
	696	tnid.uVersion = 0;
	697	res = Shell_NotifyIcon(NIM_SETVERSION, &tnid);
	698	#endif
	699
	700	tnid.cbSize = sizeof(NOTIFYICONDATA);
	701	tnid.hWnd = hwnd;
	702	tnid.uID = 1; /* unique within this systray use */
	703	tnid.uFlags = NIF_MESSAGE \| NIF_ICON \| NIF_TIP;
	704	tnid.uCallbackMessage = WM_SYSTRAY;
	705	tnid.hIcon = hicon = LoadIcon (instance, MAKEINTRESOURCE(201));
	706	strcpy(tnid.szTip, "Pageant (PuTTY authentication agent)");
	707
	708	res = Shell_NotifyIcon(NIM_ADD, &tnid);
	709
	710	if (hicon)
	711	DestroyIcon(hicon);
	712
	713	systray_menu = CreatePopupMenu();
70acd63f	714	AppendMenu (systray_menu, MF_ENABLED, IDM_VIEWKEYS, "&View Keys");
70acd63f	715	AppendMenu (systray_menu, MF_ENABLED, IDM_CLOSE, "E&xit");
5c58ad2d	716	}
	717
	718	ShowWindow (hwnd, SW_HIDE);
	719
	720	/*
dacbd0e8	721	* Initialise storage for RSA keys.
	722	*/
	723	rsakeys = newtree234(cmpkeys);
	724
	725	/*
	726	* Process the command line and add RSA keys as listed on it.
5c58ad2d	727	*/
5c58ad2d	728	{
8c42f28c	729	char *p;
	730	int inquotes = 0;
	731	p = cmdline;
dacbd0e8	732	while (*p) {
	733	while (p && isspace(p)) p++;
	734	if (p && !isspace(p)) {
8c42f28c	735	char q = p, pp = p;
	736	while (p && (inquotes \|\| !isspace(p)))
	737	{
	738	if (*p == '"') {
	739	inquotes = !inquotes;
	740	p++;
	741	continue;
	742	}
	743	pp++ = p++;
	744	}
	745	if (*pp) {
	746	if (*p) p++;
	747	*pp++ = '\0';
	748	}
dacbd0e8	749	add_keyfile(q);
	750	}
	751	}
5c58ad2d	752	}
	753
	754	/*
dacbd0e8	755	* Main message loop.
5c58ad2d	756	*/
5c58ad2d	757	while (GetMessage(&msg, NULL, 0, 0) == 1) {
	758	TranslateMessage(&msg);
	759	DispatchMessage(&msg);
	760	}
	761
	762	/* Clean up the system tray icon */
	763	{
	764	NOTIFYICONDATA tnid;
	765
	766	tnid.cbSize = sizeof(NOTIFYICONDATA);
	767	tnid.hWnd = hwnd;
	768	tnid.uID = 1;
	769
	770	Shell_NotifyIcon(NIM_DELETE, &tnid);
	771
	772	DestroyMenu(systray_menu);
	773	}
	774
016ef8ab	775	if (advapi) FreeLibrary(advapi);
5c58ad2d	776	exit(msg.wParam);
5c58ad2d	777	}