| 1 | /* |
| 2 | * Pageant: the PuTTY Authentication Agent. |
| 3 | */ |
| 4 | |
| 5 | #include <windows.h> |
| 6 | #include <aclapi.h> |
| 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) |
| 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 |
| 25 | |
| 26 | #define IDM_CLOSE 0x0010 |
| 27 | #define IDM_VIEWKEYS 0x0020 |
| 28 | |
| 29 | #define APPNAME "Pageant" |
| 30 | |
| 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 | |
| 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 | |
| 54 | /* |
| 55 | * We need this to link with the RSA code, because rsaencrypt() |
| 56 | * pads its data with random bytes. Since we only use rsadecrypt(), |
| 57 | * which is deterministic, this should never be called. |
| 58 | * |
| 59 | * If it _is_ called, there is a _serious_ problem, because it |
| 60 | * won't generate true random numbers. So we must scream, panic, |
| 61 | * and exit immediately if that should happen. |
| 62 | */ |
| 63 | int random_byte(void) { |
| 64 | MessageBox(hwnd, "Internal Error", APPNAME, MB_OK | MB_ICONERROR); |
| 65 | exit(0); |
| 66 | } |
| 67 | |
| 68 | /* |
| 69 | * This function is needed to link with the DES code. We need not |
| 70 | * have it do anything at all. |
| 71 | */ |
| 72 | void logevent(char *msg) { |
| 73 | } |
| 74 | |
| 75 | #define GET_32BIT(cp) \ |
| 76 | (((unsigned long)(unsigned char)(cp)[0] << 24) | \ |
| 77 | ((unsigned long)(unsigned char)(cp)[1] << 16) | \ |
| 78 | ((unsigned long)(unsigned char)(cp)[2] << 8) | \ |
| 79 | ((unsigned long)(unsigned char)(cp)[3])) |
| 80 | |
| 81 | #define PUT_32BIT(cp, value) { \ |
| 82 | (cp)[0] = (unsigned char)((value) >> 24); \ |
| 83 | (cp)[1] = (unsigned char)((value) >> 16); \ |
| 84 | (cp)[2] = (unsigned char)((value) >> 8); \ |
| 85 | (cp)[3] = (unsigned char)(value); } |
| 86 | |
| 87 | #define PASSPHRASE_MAXLEN 512 |
| 88 | |
| 89 | struct PassphraseProcStruct { |
| 90 | char *passphrase; |
| 91 | char *comment; |
| 92 | }; |
| 93 | |
| 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; |
| 100 | struct PassphraseProcStruct *p; |
| 101 | |
| 102 | switch (msg) { |
| 103 | case WM_INITDIALOG: |
| 104 | p = (struct PassphraseProcStruct *)lParam; |
| 105 | passphrase = p->passphrase; |
| 106 | if (p->comment) |
| 107 | SetDlgItemText(hwnd, 101, p->comment); |
| 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 | /* |
| 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 | 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'; |
| 154 | SendDlgItemMessage (keylist, 100, LB_ADDSTRING, |
| 155 | 0, (LPARAM)listentry); |
| 156 | } |
| 157 | SendDlgItemMessage (keylist, 100, LB_SETCURSEL, (WPARAM) -1, 0); |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | /* |
| 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; |
| 170 | char *comment; |
| 171 | struct PassphraseProcStruct pps; |
| 172 | |
| 173 | needs_pass = rsakey_encrypted(filename, &comment); |
| 174 | attempts = 0; |
| 175 | key = malloc(sizeof(*key)); |
| 176 | pps.passphrase = passphrase; |
| 177 | pps.comment = comment; |
| 178 | do { |
| 179 | if (needs_pass) { |
| 180 | int dlgret; |
| 181 | dlgret = DialogBoxParam(instance, MAKEINTRESOURCE(210), |
| 182 | NULL, PassphraseProc, |
| 183 | (LPARAM)&pps); |
| 184 | if (!dlgret) { |
| 185 | if (comment) free(comment); |
| 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); |
| 194 | if (comment) free(comment); |
| 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 | */ |
| 208 | void answer_msg(void *msg) { |
| 209 | unsigned char *p = msg; |
| 210 | unsigned char *ret = msg; |
| 211 | int type; |
| 212 | |
| 213 | /* |
| 214 | * Get the message type. |
| 215 | */ |
| 216 | type = p[4]; |
| 217 | |
| 218 | p += 5; |
| 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; |
| 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); |
| 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; |
| 306 | PUT_32BIT(ret, len-4); |
| 307 | ret[4] = SSH_AGENT_RSA_RESPONSE; |
| 308 | memcpy(ret+5, response_md5, 16); |
| 309 | } |
| 310 | break; |
| 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 | */ |
| 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); |
| 338 | free(key); |
| 339 | } |
| 340 | } |
| 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 | */ |
| 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(); |
| 360 | freersakey(key); |
| 361 | ret[4] = SSH_AGENT_SUCCESS; |
| 362 | } |
| 363 | } |
| 364 | break; |
| 365 | default: |
| 366 | failure: |
| 367 | /* |
| 368 | * Unrecognised message. Return SSH_AGENT_FAILURE. |
| 369 | */ |
| 370 | PUT_32BIT(ret, 1); |
| 371 | ret[4] = SSH_AGENT_FAILURE; |
| 372 | break; |
| 373 | } |
| 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: |
| 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(); |
| 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); |
| 461 | keylist_update(); |
| 462 | } |
| 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); |
| 478 | keylist_update(); |
| 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); |
| 502 | } else if (lParam == WM_LBUTTONDBLCLK) { |
| 503 | /* Equivalent to IDM_VIEWKEYS. */ |
| 504 | PostMessage(hwnd, WM_COMMAND, IDM_VIEWKEYS, 0); |
| 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); |
| 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); |
| 536 | } |
| 537 | break; |
| 538 | } |
| 539 | break; |
| 540 | case WM_DESTROY: |
| 541 | PostQuitMessage (0); |
| 542 | return 0; |
| 543 | case WM_COPYDATA: |
| 544 | { |
| 545 | COPYDATASTRUCT *cds; |
| 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; |
| 552 | |
| 553 | cds = (COPYDATASTRUCT *)lParam; |
| 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; |
| 568 | if (has_security) { |
| 569 | if ((proc = OpenProcess(MAXIMUM_ALLOWED, FALSE, |
| 570 | GetCurrentProcessId())) == NULL) { |
| 571 | #ifdef DEBUG_IPC |
| 572 | debug(("couldn't get handle for process\r\n")); |
| 573 | #endif |
| 574 | return 0; |
| 575 | } |
| 576 | if (getsecurityinfo(proc, SE_KERNEL_OBJECT, |
| 577 | OWNER_SECURITY_INFORMATION, |
| 578 | &procowner, NULL, NULL, NULL, |
| 579 | &psd2) != ERROR_SUCCESS) { |
| 580 | #ifdef DEBUG_IPC |
| 581 | debug(("couldn't get owner info for process\r\n")); |
| 582 | #endif |
| 583 | CloseHandle(proc); |
| 584 | return 0; /* unable to get security info */ |
| 585 | } |
| 586 | CloseHandle(proc); |
| 587 | if ((rc = getsecurityinfo(filemap, SE_KERNEL_OBJECT, |
| 588 | OWNER_SECURITY_INFORMATION, |
| 589 | &mapowner, NULL, NULL, NULL, |
| 590 | &psd1) != ERROR_SUCCESS)) { |
| 591 | #ifdef DEBUG_IPC |
| 592 | debug(("couldn't get owner info for filemap: %d\r\n", rc)); |
| 593 | #endif |
| 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! */ |
| 601 | #ifdef DEBUG_IPC |
| 602 | debug(("security stuff matched\r\n")); |
| 603 | #endif |
| 604 | LocalFree(psd1); |
| 605 | LocalFree(psd2); |
| 606 | } else { |
| 607 | #ifdef DEBUG_IPC |
| 608 | debug(("security APIs not present\r\n")); |
| 609 | #endif |
| 610 | } |
| 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; |
| 622 | } |
| 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; |
| 630 | MSG msg; |
| 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; |
| 660 | |
| 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); |
| 667 | if (advapi) FreeLibrary(advapi); |
| 668 | return 0; |
| 669 | } |
| 670 | |
| 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(); |
| 721 | AppendMenu (systray_menu, MF_ENABLED, IDM_VIEWKEYS, "&View Keys"); |
| 722 | AppendMenu (systray_menu, MF_ENABLED, IDM_CLOSE, "E&xit"); |
| 723 | } |
| 724 | |
| 725 | ShowWindow (hwnd, SW_HIDE); |
| 726 | |
| 727 | /* |
| 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. |
| 734 | */ |
| 735 | { |
| 736 | char *p; |
| 737 | int inquotes = 0; |
| 738 | p = cmdline; |
| 739 | while (*p) { |
| 740 | while (*p && isspace(*p)) p++; |
| 741 | if (*p && !isspace(*p)) { |
| 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 | } |
| 756 | add_keyfile(q); |
| 757 | } |
| 758 | } |
| 759 | } |
| 760 | |
| 761 | /* |
| 762 | * Main message loop. |
| 763 | */ |
| 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 | |
| 782 | if (advapi) FreeLibrary(advapi); |
| 783 | exit(msg.wParam); |
| 784 | } |