[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)) {
            char listentry[512], *p;
            /*
             * Replace two spaces in the fingerprint with tabs, for
             * nice alignment in the box.
             */
            rsa_fingerprint(listentry, sizeof(listentry), key);
            p = strchr(listentry, ' '); if (p) *p = '\t';
            p = strchr(listentry, ' '); if (p) *p = '\t';
            SendDlgItemMessage (keylist, 100, LB_ADDSTRING,
                                0, (LPARAM)listentry);
        }
        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);
                free(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:
        keylist = hwnd;
	{
	    static int tabs[2] = {25, 175};
	    SendDlgItemMessage (hwnd, 100, LB_SETTABSTOPS, 2,
				(LPARAM) tabs);
	}
        keylist_update();
        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);
                keylist_update();
            }
            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)) {
1c2a93c4	146	char listentry[512], *p;
	147	/*
	148	* Replace two spaces in the fingerprint with tabs, for
	149	* nice alignment in the box.
	150	*/
	151	rsa_fingerprint(listentry, sizeof(listentry), key);
	152	p = strchr(listentry, ' '); if (p) *p = '\t';
	153	p = strchr(listentry, ' '); if (p) *p = '\t';
3c0b3d06	154	SendDlgItemMessage (keylist, 100, LB_ADDSTRING,
1c2a93c4	155	0, (LPARAM)listentry);
3c0b3d06	156	}
	157	SendDlgItemMessage (keylist, 100, LB_SETCURSEL, (WPARAM) -1, 0);
	158	}
	159	}
	160
	161	/*
5c58ad2d	162	* This function loads a key from a file and adds it.
	163	*/
	164	void add_keyfile(char *filename) {
	165	char passphrase[PASSPHRASE_MAXLEN];
	166	struct RSAKey *key;
	167	int needs_pass;
	168	int ret;
	169	int attempts;
d4de2d2a	170	char *comment;
d4de2d2a	171	struct PassphraseProcStruct pps;
5c58ad2d	172
d4de2d2a	173	needs_pass = rsakey_encrypted(filename, &comment);
5c58ad2d	174	attempts = 0;
5c58ad2d	175	key = malloc(sizeof(*key));
d4de2d2a	176	pps.passphrase = passphrase;
d4de2d2a	177	pps.comment = comment;
5c58ad2d	178	do {
	179	if (needs_pass) {
	180	int dlgret;
	181	dlgret = DialogBoxParam(instance, MAKEINTRESOURCE(210),
	182	NULL, PassphraseProc,
d4de2d2a	183	(LPARAM)&pps);
5c58ad2d	184	if (!dlgret) {
d4de2d2a	185	if (comment) free(comment);
5c58ad2d	186	free(key);
	187	return; /* operation cancelled */
	188	}
	189	} else
	190	*passphrase = '\0';
	191	ret = loadrsakey(filename, key, passphrase);
	192	attempts++;
	193	} while (ret == -1);
d4de2d2a	194	if (comment) free(comment);
5c58ad2d	195	if (ret == 0) {
	196	MessageBox(NULL, "Couldn't load public key.", APPNAME,
	197	MB_OK \| MB_ICONERROR);
	198	free(key);
	199	return;
	200	}
	201	if (add234(rsakeys, key) != key)
	202	free(key); /* already present, don't waste RAM */
	203	}
	204
	205	/*
	206	* This is the main agent function that answers messages.
	207	*/
d70f60ae	208	void answer_msg(void *msg) {
	209	unsigned char *p = msg;
	210	unsigned char *ret = msg;
5c58ad2d	211	int type;
5c58ad2d	212
5c58ad2d	213	/*
	214	* Get the message type.
	215	*/
	216	type = p[4];
	217
	218	p += 5;
5c58ad2d	219	switch (type) {
	220	case SSH_AGENTC_REQUEST_RSA_IDENTITIES:
	221	/*
	222	* Reply with SSH_AGENT_RSA_IDENTITIES_ANSWER.
	223	*/
	224	{
	225	enum234 e;
	226	struct RSAKey *key;
	227	int len, nkeys;
	228
	229	/*
	230	* Count up the number and length of keys we hold.
	231	*/
	232	len = nkeys = 0;
	233	for (key = first234(rsakeys, &e); key; key = next234(&e)) {
	234	nkeys++;
	235	len += 4; /* length field */
	236	len += ssh1_bignum_length(key->exponent);
	237	len += ssh1_bignum_length(key->modulus);
	238	len += 4 + strlen(key->comment);
	239	}
	240
	241	/*
	242	* Packet header is the obvious five bytes, plus four
	243	* bytes for the key count.
	244	*/
	245	len += 5 + 4;
d70f60ae	246	if (len > AGENT_MAX_MSGLEN)
	247	goto failure; /* aaargh! too much stuff! */
	248	PUT_32BIT(ret, len-4);
	249	ret[4] = SSH_AGENT_RSA_IDENTITIES_ANSWER;
	250	PUT_32BIT(ret+5, nkeys);
	251	p = ret + 5 + 4;
	252	for (key = first234(rsakeys, &e); key; key = next234(&e)) {
	253	PUT_32BIT(p, ssh1_bignum_bitcount(key->modulus));
	254	p += 4;
	255	p += ssh1_write_bignum(p, key->exponent);
	256	p += ssh1_write_bignum(p, key->modulus);
	257	PUT_32BIT(p, strlen(key->comment));
	258	memcpy(p+4, key->comment, strlen(key->comment));
	259	p += 4 + strlen(key->comment);
5c58ad2d	260	}
	261	}
	262	break;
	263	case SSH_AGENTC_RSA_CHALLENGE:
	264	/*
	265	* Reply with either SSH_AGENT_RSA_RESPONSE or
	266	* SSH_AGENT_FAILURE, depending on whether we have that key
	267	* or not.
	268	*/
	269	{
	270	struct RSAKey reqkey, *key;
	271	Bignum challenge, response;
	272	unsigned char response_source[48], response_md5[16];
	273	struct MD5Context md5c;
	274	int i, len;
	275
	276	p += 4;
	277	p += ssh1_read_bignum(p, &reqkey.exponent);
	278	p += ssh1_read_bignum(p, &reqkey.modulus);
	279	p += ssh1_read_bignum(p, &challenge);
	280	memcpy(response_source+32, p, 16); p += 16;
	281	if (GET_32BIT(p) != 1 \|\|
	282	(key = find234(rsakeys, &reqkey, NULL)) == NULL) {
	283	freebn(reqkey.exponent);
	284	freebn(reqkey.modulus);
	285	freebn(challenge);
	286	goto failure;
	287	}
	288	response = rsadecrypt(challenge, key);
	289	for (i = 0; i < 32; i++)
	290	response_source[i] = bignum_byte(response, 31-i);
	291
	292	MD5Init(&md5c);
	293	MD5Update(&md5c, response_source, 48);
	294	MD5Final(response_md5, &md5c);
	295	memset(response_source, 0, 48); /* burn the evidence */
	296	freebn(response); /* and that evidence */
	297	freebn(challenge); /* yes, and that evidence */
	298	freebn(reqkey.exponent); /* and free some memory ... */
	299	freebn(reqkey.modulus); /* ... while we're at it. */
	300
	301	/*
	302	* Packet is the obvious five byte header, plus sixteen
	303	* bytes of MD5.
	304	*/
	305	len = 5 + 16;
d70f60ae	306	PUT_32BIT(ret, len-4);
	307	ret[4] = SSH_AGENT_RSA_RESPONSE;
	308	memcpy(ret+5, response_md5, 16);
5c58ad2d	309	}
5c58ad2d	310	break;
5c58ad2d	311	case SSH_AGENTC_ADD_RSA_IDENTITY:
	312	/*
	313	* Add to the list and return SSH_AGENT_SUCCESS, or
	314	* SSH_AGENT_FAILURE if the key was malformed.
	315	*/
3c0b3d06	316	{
	317	struct RSAKey *key;
	318	char *comment;
	319	key = malloc(sizeof(struct RSAKey));
	320	memset(key, 0, sizeof(key));
	321	p += makekey(p, key, NULL, 1);
	322	p += makeprivate(p, key);
	323	p += ssh1_read_bignum(p, NULL); /* p^-1 mod q */
	324	p += ssh1_read_bignum(p, NULL); /* p */
	325	p += ssh1_read_bignum(p, NULL); /* q */
	326	comment = malloc(GET_32BIT(p));
	327	if (comment) {
	328	memcpy(comment, p+4, GET_32BIT(p));
	329	key->comment = comment;
	330	}
	331	PUT_32BIT(ret, 1);
	332	ret[4] = SSH_AGENT_FAILURE;
	333	if (add234(rsakeys, key) == key) {
	334	keylist_update();
	335	ret[4] = SSH_AGENT_SUCCESS;
	336	} else {
	337	freersakey(key);
1c2a93c4	338	free(key);
3c0b3d06	339	}
3c0b3d06	340	}
5c58ad2d	341	break;
	342	case SSH_AGENTC_REMOVE_RSA_IDENTITY:
	343	/*
	344	* Remove from the list and return SSH_AGENT_SUCCESS, or
	345	* perhaps SSH_AGENT_FAILURE if it wasn't in the list to
	346	* start with.
	347	*/
3c0b3d06	348	{
	349	struct RSAKey reqkey, *key;
	350
	351	p += makekey(p, &reqkey, NULL, 0);
	352	key = find234(rsakeys, &reqkey, NULL);
	353	freebn(reqkey.exponent);
	354	freebn(reqkey.modulus);
	355	PUT_32BIT(ret, 1);
	356	ret[4] = SSH_AGENT_FAILURE;
	357	if (key) {
	358	del234(rsakeys, key);
	359	keylist_update();
d4de2d2a	360	freersakey(key);
3c0b3d06	361	ret[4] = SSH_AGENT_SUCCESS;
	362	}
	363	}
5c58ad2d	364	break;
5c58ad2d	365	default:
	366	failure:
	367	/*
	368	* Unrecognised message. Return SSH_AGENT_FAILURE.
	369	*/
d70f60ae	370	PUT_32BIT(ret, 1);
d70f60ae	371	ret[4] = SSH_AGENT_FAILURE;
5c58ad2d	372	break;
5c58ad2d	373	}
5c58ad2d	374	}
	375
	376	/*
	377	* Key comparison function for the 2-3-4 tree of RSA keys.
	378	*/
	379	int cmpkeys(void av, void bv) {
	380	struct RSAKey a = (struct RSAKey )av;
	381	struct RSAKey b = (struct RSAKey )bv;
	382	Bignum am, bm;
	383	int alen, blen;
	384
	385	am = a->modulus;
	386	bm = b->modulus;
	387	/*
	388	* Compare by length of moduli.
	389	*/
	390	alen = ssh1_bignum_bitcount(am);
	391	blen = ssh1_bignum_bitcount(bm);
	392	if (alen > blen) return +1; else if (alen < blen) return -1;
	393	/*
	394	* Now compare by moduli themselves.
	395	*/
	396	alen = (alen + 7) / 8; /* byte count */
	397	while (alen-- > 0) {
	398	int abyte, bbyte;
	399	abyte = bignum_byte(am, alen);
	400	bbyte = bignum_byte(bm, alen);
	401	if (abyte > bbyte) return +1; else if (abyte < bbyte) return -1;
	402	}
	403	/*
	404	* Give up.
	405	*/
	406	return 0;
	407	}
	408
	409	static void error(char *s) {
	410	MessageBox(hwnd, s, APPNAME, MB_OK \| MB_ICONERROR);
	411	}
	412
	413	/*
	414	* Dialog-box function for the key list box.
	415	*/
	416	static int CALLBACK KeyListProc(HWND hwnd, UINT msg,
	417	WPARAM wParam, LPARAM lParam) {
	418	enum234 e;
	419	struct RSAKey *key;
	420	OPENFILENAME of;
	421	char filename[FILENAME_MAX];
	422
	423	switch (msg) {
	424	case WM_INITDIALOG:
1c2a93c4	425	keylist = hwnd;
	426	{
	427	static int tabs[2] = {25, 175};
	428	SendDlgItemMessage (hwnd, 100, LB_SETTABSTOPS, 2,
	429	(LPARAM) tabs);
	430	}
	431	keylist_update();
5c58ad2d	432	return 0;
	433	case WM_COMMAND:
	434	switch (LOWORD(wParam)) {
	435	case IDOK:
	436	case IDCANCEL:
	437	keylist = NULL;
	438	DestroyWindow(hwnd);
	439	return 0;
	440	case 101: /* add key */
	441	if (HIWORD(wParam) == BN_CLICKED \|\|
	442	HIWORD(wParam) == BN_DOUBLECLICKED) {
	443	memset(&of, 0, sizeof(of));
	444	#ifdef OPENFILENAME_SIZE_VERSION_400
	445	of.lStructSize = OPENFILENAME_SIZE_VERSION_400;
	446	#else
	447	of.lStructSize = sizeof(of);
	448	#endif
	449	of.hwndOwner = hwnd;
	450	of.lpstrFilter = "All Files\0*\0\0\0";
	451	of.lpstrCustomFilter = NULL;
	452	of.nFilterIndex = 1;
	453	of.lpstrFile = filename; *filename = '\0';
	454	of.nMaxFile = sizeof(filename);
	455	of.lpstrFileTitle = NULL;
	456	of.lpstrInitialDir = NULL;
	457	of.lpstrTitle = "Select Public Key File";
	458	of.Flags = 0;
	459	if (GetOpenFileName(&of)) {
	460	add_keyfile(filename);
3c0b3d06	461	keylist_update();
5c58ad2d	462	}
5c58ad2d	463	}
	464	return 0;
	465	case 102: /* remove key */
	466	if (HIWORD(wParam) == BN_CLICKED \|\|
	467	HIWORD(wParam) == BN_DOUBLECLICKED) {
	468	int n = SendDlgItemMessage (hwnd, 100, LB_GETCURSEL, 0, 0);
	469	if (n == LB_ERR \|\| n == 0) {
	470	MessageBeep(0);
	471	break;
	472	}
	473	for (key = first234(rsakeys, &e); key; key = next234(&e))
	474	if (n-- == 0)
	475	break;
	476	del234(rsakeys, key);
	477	freersakey(key); free(key);
1c2a93c4	478	keylist_update();
5c58ad2d	479	}
	480	return 0;
	481	}
	482	return 0;
	483	case WM_CLOSE:
	484	keylist = NULL;
	485	DestroyWindow(hwnd);
	486	return 0;
	487	}
	488	return 0;
	489	}
	490
	491	static LRESULT CALLBACK WndProc (HWND hwnd, UINT message,
	492	WPARAM wParam, LPARAM lParam) {
	493	int ret;
	494	static int menuinprogress;
	495
	496	switch (message) {
	497	case WM_SYSTRAY:
	498	if (lParam == WM_RBUTTONUP) {
	499	POINT cursorpos;
	500	GetCursorPos(&cursorpos);
	501	PostMessage(hwnd, WM_SYSTRAY2, cursorpos.x, cursorpos.y);
905beba5	502	} else if (lParam == WM_LBUTTONDBLCLK) {
	503	/* Equivalent to IDM_VIEWKEYS. */
	504	PostMessage(hwnd, WM_COMMAND, IDM_VIEWKEYS, 0);
5c58ad2d	505	}
	506	break;
	507	case WM_SYSTRAY2:
	508	if (!menuinprogress) {
	509	menuinprogress = 1;
	510	SetForegroundWindow(hwnd);
	511	ret = TrackPopupMenu(systray_menu,
	512	TPM_RIGHTALIGN \| TPM_BOTTOMALIGN \|
	513	TPM_RIGHTBUTTON,
	514	wParam, lParam, 0, hwnd, NULL);
	515	menuinprogress = 0;
	516	}
	517	break;
	518	case WM_COMMAND:
	519	case WM_SYSCOMMAND:
	520	switch (wParam & ~0xF) { /* low 4 bits reserved to Windows */
	521	case IDM_CLOSE:
	522	SendMessage(hwnd, WM_CLOSE, 0, 0);
	523	break;
	524	case IDM_VIEWKEYS:
	525	if (!keylist) {
	526	keylist = CreateDialog (instance, MAKEINTRESOURCE(211),
	527	NULL, KeyListProc);
	528	ShowWindow (keylist, SW_SHOWNORMAL);
905beba5	529	/*
	530	* Sometimes the window comes up minimised / hidden
	531	* for no obvious reason. Prevent this.
	532	*/
	533	SetForegroundWindow(keylist);
	534	SetWindowPos (keylist, HWND_TOP, 0, 0, 0, 0,
	535	SWP_NOMOVE \| SWP_NOSIZE \| SWP_SHOWWINDOW);
5c58ad2d	536	}
	537	break;
	538	}
	539	break;
	540	case WM_DESTROY:
	541	PostQuitMessage (0);
	542	return 0;
	543	case WM_COPYDATA:
	544	{
	545	COPYDATASTRUCT *cds;
d70f60ae	546	char *mapname;
	547	void *p;
	548	HANDLE filemap, proc;
	549	PSID mapowner, procowner;
	550	PSECURITY_DESCRIPTOR psd1 = NULL, psd2 = NULL;
	551	int ret = 0;
5c58ad2d	552
5c58ad2d	553	cds = (COPYDATASTRUCT *)lParam;
d70f60ae	554	if (cds->dwData != AGENT_COPYDATA_ID)
	555	return 0; /* not our message, mate */
	556	mapname = (char *)cds->lpData;
	557	if (mapname[cds->cbData - 1] != '\0')
	558	return 0; /* failure to be ASCIZ! */
	559	#ifdef DEBUG_IPC
	560	debug(("mapname is :%s:\r\n", mapname));
	561	#endif
	562	filemap = OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, mapname);
	563	#ifdef DEBUG_IPC
	564	debug(("filemap is %p\r\n", filemap));
	565	#endif
	566	if (filemap != NULL && filemap != INVALID_HANDLE_VALUE) {
	567	int rc;
016ef8ab	568	if (has_security) {
	569	if ((proc = OpenProcess(MAXIMUM_ALLOWED, FALSE,
	570	GetCurrentProcessId())) == NULL) {
d70f60ae	571	#ifdef DEBUG_IPC
016ef8ab	572	debug(("couldn't get handle for process\r\n"));
d70f60ae	573	#endif
016ef8ab	574	return 0;
	575	}
	576	if (getsecurityinfo(proc, SE_KERNEL_OBJECT,
	577	OWNER_SECURITY_INFORMATION,
	578	&procowner, NULL, NULL, NULL,
	579	&psd2) != ERROR_SUCCESS) {
d70f60ae	580	#ifdef DEBUG_IPC
016ef8ab	581	debug(("couldn't get owner info for process\r\n"));
d70f60ae	582	#endif
016ef8ab	583	CloseHandle(proc);
	584	return 0; /* unable to get security info */
	585	}
d70f60ae	586	CloseHandle(proc);
016ef8ab	587	if ((rc = getsecurityinfo(filemap, SE_KERNEL_OBJECT,
	588	OWNER_SECURITY_INFORMATION,
	589	&mapowner, NULL, NULL, NULL,
	590	&psd1) != ERROR_SUCCESS)) {
d70f60ae	591	#ifdef DEBUG_IPC
016ef8ab	592	debug(("couldn't get owner info for filemap: %d\r\n", rc));
d70f60ae	593	#endif
016ef8ab	594	return 0;
	595	}
	596	#ifdef DEBUG_IPC
	597	debug(("got security stuff\r\n"));
	598	#endif
	599	if (!EqualSid(mapowner, procowner))
	600	return 0; /* security ID mismatch! */
d70f60ae	601	#ifdef DEBUG_IPC
016ef8ab	602	debug(("security stuff matched\r\n"));
d70f60ae	603	#endif
016ef8ab	604	LocalFree(psd1);
	605	LocalFree(psd2);
	606	} else {
d70f60ae	607	#ifdef DEBUG_IPC
016ef8ab	608	debug(("security APIs not present\r\n"));
d70f60ae	609	#endif
016ef8ab	610	}
d70f60ae	611	p = MapViewOfFile(filemap, FILE_MAP_WRITE, 0, 0, 0);
	612	#ifdef DEBUG_IPC
	613	debug(("p is %p\r\n", p));
	614	{int i; for(i=0;i<5;i++)debug(("p[%d]=%02x\r\n", i, ((unsigned char *)p)[i]));}
	615	#endif
	616	answer_msg(p);
	617	ret = 1;
	618	UnmapViewOfFile(p);
	619	}
	620	CloseHandle(filemap);
	621	return ret;
5c58ad2d	622	}
5c58ad2d	623	}
	624
	625	return DefWindowProc (hwnd, message, wParam, lParam);
	626	}
	627
	628	int WINAPI WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmdline, int show) {
	629	WNDCLASS wndclass;
5c58ad2d	630	MSG msg;
016ef8ab	631	OSVERSIONINFO osi;
	632	HMODULE advapi;
	633
	634	/*
	635	* Determine whether we're an NT system (should have security
	636	* APIs) or a non-NT system (don't do security).
	637	*/
	638	memset(&osi, 0, sizeof(OSVERSIONINFO));
	639	osi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
	640	if (GetVersionEx(&osi) && osi.dwPlatformId==VER_PLATFORM_WIN32_NT) {
	641	has_security = TRUE;
	642	} else
	643	has_security = FALSE;
	644
	645	if (has_security) {
	646	/*
	647	* Attempt to ge the security API we need.
	648	*/
	649	advapi = LoadLibrary("ADVAPI32.DLL");
	650	getsecurityinfo = (gsi_fn_t)GetProcAddress(advapi, "GetSecurityInfo");
	651	if (!getsecurityinfo) {
	652	MessageBox(NULL,
	653	"Unable to access security APIs. Pageant will\n"
	654	"not run, in case it causes a security breach.",
	655	"Pageant Fatal Error", MB_ICONERROR \| MB_OK);
	656	return 1;
	657	}
	658	} else
	659	advapi = NULL;
5c58ad2d	660
2faac2e1	661	/*
	662	* First bomb out totally if we are already running.
	663	*/
	664	if (FindWindow("Pageant", "Pageant")) {
	665	MessageBox(NULL, "Pageant is already running", "Pageant Error",
	666	MB_ICONERROR \| MB_OK);
016ef8ab	667	if (advapi) FreeLibrary(advapi);
2faac2e1	668	return 0;
	669	}
	670
5c58ad2d	671	instance = inst;
	672
	673	if (!prev) {
	674	wndclass.style = 0;
	675	wndclass.lpfnWndProc = WndProc;
	676	wndclass.cbClsExtra = 0;
	677	wndclass.cbWndExtra = 0;
	678	wndclass.hInstance = inst;
	679	wndclass.hIcon = LoadIcon (inst,
	680	MAKEINTRESOURCE(IDI_MAINICON));
	681	wndclass.hCursor = LoadCursor (NULL, IDC_IBEAM);
	682	wndclass.hbrBackground = GetStockObject (BLACK_BRUSH);
	683	wndclass.lpszMenuName = NULL;
	684	wndclass.lpszClassName = APPNAME;
	685
	686	RegisterClass (&wndclass);
	687	}
	688
	689	hwnd = keylist = NULL;
	690
	691	hwnd = CreateWindow (APPNAME, APPNAME,
	692	WS_OVERLAPPEDWINDOW \| WS_VSCROLL,
	693	CW_USEDEFAULT, CW_USEDEFAULT,
	694	100, 100, NULL, NULL, inst, NULL);
	695
	696	/* Set up a system tray icon */
	697	{
	698	BOOL res;
	699	NOTIFYICONDATA tnid;
	700	HICON hicon;
	701
	702	#ifdef NIM_SETVERSION
	703	tnid.uVersion = 0;
	704	res = Shell_NotifyIcon(NIM_SETVERSION, &tnid);
	705	#endif
	706
	707	tnid.cbSize = sizeof(NOTIFYICONDATA);
	708	tnid.hWnd = hwnd;
	709	tnid.uID = 1; /* unique within this systray use */
	710	tnid.uFlags = NIF_MESSAGE \| NIF_ICON \| NIF_TIP;
	711	tnid.uCallbackMessage = WM_SYSTRAY;
	712	tnid.hIcon = hicon = LoadIcon (instance, MAKEINTRESOURCE(201));
	713	strcpy(tnid.szTip, "Pageant (PuTTY authentication agent)");
	714
	715	res = Shell_NotifyIcon(NIM_ADD, &tnid);
	716
	717	if (hicon)
	718	DestroyIcon(hicon);
	719
	720	systray_menu = CreatePopupMenu();
70acd63f	721	AppendMenu (systray_menu, MF_ENABLED, IDM_VIEWKEYS, "&View Keys");
70acd63f	722	AppendMenu (systray_menu, MF_ENABLED, IDM_CLOSE, "E&xit");
5c58ad2d	723	}
	724
	725	ShowWindow (hwnd, SW_HIDE);
	726
	727	/*
dacbd0e8	728	* Initialise storage for RSA keys.
	729	*/
	730	rsakeys = newtree234(cmpkeys);
	731
	732	/*
	733	* Process the command line and add RSA keys as listed on it.
5c58ad2d	734	*/
5c58ad2d	735	{
8c42f28c	736	char *p;
	737	int inquotes = 0;
	738	p = cmdline;
dacbd0e8	739	while (*p) {
	740	while (p && isspace(p)) p++;
	741	if (p && !isspace(p)) {
8c42f28c	742	char q = p, pp = p;
	743	while (p && (inquotes \|\| !isspace(p)))
	744	{
	745	if (*p == '"') {
	746	inquotes = !inquotes;
	747	p++;
	748	continue;
	749	}
	750	pp++ = p++;
	751	}
	752	if (*pp) {
	753	if (*p) p++;
	754	*pp++ = '\0';
	755	}
dacbd0e8	756	add_keyfile(q);
	757	}
	758	}
5c58ad2d	759	}
	760
	761	/*
dacbd0e8	762	* Main message loop.
5c58ad2d	763	*/
5c58ad2d	764	while (GetMessage(&msg, NULL, 0, 0) == 1) {
	765	TranslateMessage(&msg);
	766	DispatchMessage(&msg);
	767	}
	768
	769	/* Clean up the system tray icon */
	770	{
	771	NOTIFYICONDATA tnid;
	772
	773	tnid.cbSize = sizeof(NOTIFYICONDATA);
	774	tnid.hWnd = hwnd;
	775	tnid.uID = 1;
	776
	777	Shell_NotifyIcon(NIM_DELETE, &tnid);
	778
	779	DestroyMenu(systray_menu);
	780	}
	781
016ef8ab	782	if (advapi) FreeLibrary(advapi);
5c58ad2d	783	exit(msg.wParam);
5c58ad2d	784	}