| 1 | /* |
| 2 | * Copyright 2000, International Business Machines Corporation and others. |
| 3 | * All Rights Reserved. |
| 4 | * |
| 5 | * This software has been released under the terms of the IBM Public |
| 6 | * License. For details, see the LICENSE file in the top-level source |
| 7 | * directory or online at http://www.openafs.org/dl/license10.html |
| 8 | */ |
| 9 | |
| 10 | /* |
| 11 | * User space client specific interface glue |
| 12 | */ |
| 13 | |
| 14 | #include <afsconfig.h> |
| 15 | #include "afs/param.h" |
| 16 | |
| 17 | |
| 18 | #include "afs/sysincludes.h" /* Standard vendor system headers */ |
| 19 | #include <net/if.h> |
| 20 | #include "afsincludes.h" /* Afs-based standard headers */ |
| 21 | #include "afs/afs_stats.h" |
| 22 | #include "afs_usrops.h" |
| 23 | #include "afs/auth.h" |
| 24 | #include "afs/cellconfig.h" |
| 25 | #include "afs/vice.h" |
| 26 | #include "afs/kautils.h" |
| 27 | #include "afs/nsafs.h" |
| 28 | |
| 29 | #define NSAFS_DFLT_RCVTHREADS 2 /* Dflt number recevice threads */ |
| 30 | #define NSAFS_BUFFER_SIZE 4096 /* Send/Receive buffer size */ |
| 31 | #define NSAFS_MAX_PATH 1024 /* Maximum path length */ |
| 32 | #define NSAFS_USERNAME_MAX 64 /* Maximum username length */ |
| 33 | #define NSAFS_PASSWORD_MAX 64 /* Maximum password length */ |
| 34 | #define NSAFS_LOGIN_HASH_SIZE 1024 /* MUST be power of two */ |
| 35 | #define TEN_MINUTES 600 /* 10 minutes = 600 seconds */ |
| 36 | |
| 37 | #define NSAFS_DIR_ALLOW "GET,HEAD,MOVE,INDEX,RMDIR" |
| 38 | #define NSAFS_LINK_ALLOW "GET,HEAD,MOVE,DELETE" |
| 39 | #define NSAFS_FILE_ALLOW "GET,HEAD,MOVE,PUT,DELETE" |
| 40 | |
| 41 | #ifndef MAX |
| 42 | #define MAX(A,B) ((A)>(B)?(A):(B)) |
| 43 | #endif /* !MAX */ |
| 44 | #ifndef MIN |
| 45 | #define MIN(A,B) ((A)<(B)?(A):(B)) |
| 46 | #endif /* !MAX */ |
| 47 | |
| 48 | /* |
| 49 | * Used by KA module to get local cell info |
| 50 | */ |
| 51 | struct afsconf_dir *KA_conf; |
| 52 | |
| 53 | /* |
| 54 | * Initialization parameters. The plugin is initialized in |
| 55 | * the Netscape parent process, but we don't initialize AFS |
| 56 | * until we are in the child process. |
| 57 | */ |
| 58 | CRITICAL nsafs_init_lock; |
| 59 | int nsafs_init_done; |
| 60 | char *mountDirParam; |
| 61 | char *cellNameParam; |
| 62 | char *confDirParam; |
| 63 | char *logFileParam; |
| 64 | char *cacheBaseDirParam; |
| 65 | int cacheBlocksParam; |
| 66 | int cacheFilesParam; |
| 67 | int cacheStatEntriesParam; |
| 68 | int dCacheSizeParam; |
| 69 | int vCacheSizeParam; |
| 70 | int chunkSizeParam; |
| 71 | int debugParam; |
| 72 | int nDaemonsParam; |
| 73 | long maxExpirationParam; |
| 74 | |
| 75 | /* |
| 76 | * Structure user to store entries in AFS login cache |
| 77 | */ |
| 78 | struct nsafs_login { |
| 79 | afs_uint32 expiration; |
| 80 | long viceid; |
| 81 | long group0; |
| 82 | long group1; |
| 83 | char username[NSAFS_USERNAME_MAX]; |
| 84 | char cellname[NSAFS_USERNAME_MAX]; |
| 85 | char cksum[SHA_HASH_BYTES]; |
| 86 | struct nsafs_login *next; |
| 87 | struct nsafs_login *prev; |
| 88 | }; |
| 89 | |
| 90 | /* |
| 91 | * Value used to initialize SHA checksums on username/password pairs |
| 92 | */ |
| 93 | afs_uint32 nsafs_login_pad[SHA_HASH_INTS] = { |
| 94 | 0x0D544971, 0x2281AC5B, 0x58B51218, 0x4085E08D, 0xB68C484B |
| 95 | }; |
| 96 | |
| 97 | /* |
| 98 | * Cache of AFS logins |
| 99 | */ |
| 100 | CRITICAL nsafs_login_lock; |
| 101 | struct { |
| 102 | struct nsafs_login *head; |
| 103 | struct nsafs_login *tail; |
| 104 | } nsafs_login_cache[NSAFS_LOGIN_HASH_SIZE]; |
| 105 | |
| 106 | /* |
| 107 | * Mapping from characters to 64 bit values |
| 108 | */ |
| 109 | static int base64_to_value[256] = { |
| 110 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 111 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 112 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 113 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 114 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 115 | 0x00, 0x00, 0x00, 0x3e, 0x00, 0x00, 0x00, 0x3f, |
| 116 | 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, |
| 117 | 0x3c, 0x3d, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 118 | 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, |
| 119 | 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, |
| 120 | 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, |
| 121 | 0x17, 0x18, 0x19, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 122 | 0x00, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, |
| 123 | 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, |
| 124 | 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30, |
| 125 | 0x31, 0x32, 0x33, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 126 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 127 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 128 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 129 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 130 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 131 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 132 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 133 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 134 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 135 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 136 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 137 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 138 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 139 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 140 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 141 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 |
| 142 | }; |
| 143 | |
| 144 | /* |
| 145 | * Decode a base64 encoded buffer in place |
| 146 | */ |
| 147 | void |
| 148 | nsafs_decode64(char *buf) |
| 149 | { |
| 150 | int i, j; |
| 151 | int len; |
| 152 | int val1; |
| 153 | int val2; |
| 154 | int val3; |
| 155 | int val4; |
| 156 | |
| 157 | /* |
| 158 | * Allow trailing blanks |
| 159 | */ |
| 160 | for (len = strlen(buf); buf[len - 1] == ' ' && len > 0; len--); |
| 161 | |
| 162 | /* |
| 163 | * Valid encodings are multiples of four characters |
| 164 | */ |
| 165 | if (len & 0x3) { |
| 166 | buf[0] = '\0'; |
| 167 | return; |
| 168 | } |
| 169 | |
| 170 | for (i = 0, j = 0; i < len; i += 4, j += 3) { |
| 171 | val1 = base64_to_value[buf[i]]; |
| 172 | val2 = base64_to_value[buf[i + 1]]; |
| 173 | val3 = base64_to_value[buf[i + 2]]; |
| 174 | val4 = base64_to_value[buf[i + 3]]; |
| 175 | buf[j] = ((val1 << 2) & 0xfc) | ((val2 >> 4) & 0x3); |
| 176 | buf[j + 1] = ((val2 << 4) & 0xf0) | ((val3 >> 2) & 0xf); |
| 177 | buf[j + 2] = ((val3 << 6) & 0xc0) | (val4 & 0x3f); |
| 178 | } |
| 179 | buf[j] = '\0'; |
| 180 | } |
| 181 | |
| 182 | |
| 183 | /* |
| 184 | * Interface for pioctls - used for unlogging |
| 185 | */ |
| 186 | #include "afs/venus.h" |
| 187 | int |
| 188 | do_pioctl(char *in_buffer, int in_size, char *out_buffer, int out_size, |
| 189 | int opcode, char *path, int followSymLinks) |
| 190 | { |
| 191 | struct ViceIoctl iob; |
| 192 | iob.in = in_buffer; |
| 193 | iob.in_size = in_size; |
| 194 | iob.out = out_buffer; |
| 195 | iob.out_size = out_size; |
| 196 | |
| 197 | #ifdef AFS_USR_SUN5_ENV |
| 198 | return syscall(AFS_SYSCALL, AFSCALL_PIOCTL, path, _VICEIOCTL(opcode), |
| 199 | &iob, followSymLinks); |
| 200 | #else /* AFS_USR_SUN5_ENV */ |
| 201 | return lpioctl(path, _VICEIOCTL(opcode), &iob, followSymLinks); |
| 202 | #endif /* AFS_USR_SUN5_ENV */ |
| 203 | } |
| 204 | |
| 205 | /* |
| 206 | * unlog - invalidate any existing AFS tokens with the kernel cache |
| 207 | * manager. In case the server is started up with tokens |
| 208 | */ |
| 209 | int |
| 210 | unlog() |
| 211 | { |
| 212 | return do_pioctl(NULL, 0, NULL, 0, VIOCUNPAG, NULL, 0); |
| 213 | } |
| 214 | |
| 215 | /* |
| 216 | * Initialize the AFS client and the login cache |
| 217 | */ |
| 218 | void |
| 219 | nsafs_init_once() |
| 220 | { |
| 221 | int i; |
| 222 | crit_enter(nsafs_init_lock); |
| 223 | if (nsafs_init_done == 0) { |
| 224 | i = unlog(); |
| 225 | if (i) { |
| 226 | /* printf("unlog from AFS failed: errno:%d\n", errno); */ |
| 227 | } |
| 228 | uafs_Init("nsafs-init", mountDirParam, confDirParam, |
| 229 | cacheBaseDirParam, cacheBlocksParam, cacheFilesParam, |
| 230 | cacheStatEntriesParam, dCacheSizeParam, vCacheSizeParam, |
| 231 | chunkSizeParam, 0, debugParam, nDaemonsParam, -1, |
| 232 | logFileParam); |
| 233 | nsafs_login_lock = crit_init(); |
| 234 | for (i = 0; i < NSAFS_LOGIN_HASH_SIZE; i++) { |
| 235 | DLL_INIT_LIST(nsafs_login_cache[i].head, |
| 236 | nsafs_login_cache[i].tail); |
| 237 | } |
| 238 | KA_conf = afs_cdir; |
| 239 | nsafs_init_done = 1; |
| 240 | } |
| 241 | crit_exit(nsafs_init_lock); |
| 242 | } |
| 243 | |
| 244 | /* |
| 245 | * Hash function for the AFS login cache |
| 246 | */ |
| 247 | int |
| 248 | nsafs_login_hash(char *name, char *cell) |
| 249 | { |
| 250 | char *p; |
| 251 | afs_uint32 val; |
| 252 | for (val = *name, p = name; *p != '\0'; p++) { |
| 253 | val = (val << 2) ^ val ^ (afs_uint32) (*p); |
| 254 | } |
| 255 | for (p = cell; *p != '\0'; p++) { |
| 256 | val = (val << 2) ^ val ^ (afs_uint32) (*p); |
| 257 | } |
| 258 | return val & (NSAFS_LOGIN_HASH_SIZE - 1); |
| 259 | } |
| 260 | |
| 261 | /* |
| 262 | * Compute a SHA checksum on the username, cellname, and password |
| 263 | */ |
| 264 | void |
| 265 | nsafs_login_checksum(char *user, char *cell, char *passwd, char *cksum) |
| 266 | { |
| 267 | int passwdLen; |
| 268 | int userLen; |
| 269 | int cellLen; |
| 270 | char *shaBuffer; |
| 271 | shaState state; |
| 272 | |
| 273 | /* |
| 274 | * Compute SHA(username,SHA(password,pad)) |
| 275 | */ |
| 276 | passwdLen = strlen(passwd); |
| 277 | userLen = strlen(user); |
| 278 | cellLen = strlen(cell); |
| 279 | shaBuffer = |
| 280 | afs_osi_Alloc(MAX(userLen + cellLen, passwdLen) + SHA_HASH_BYTES); |
| 281 | strcpy(shaBuffer, passwd); |
| 282 | memcpy((void *)(shaBuffer + passwdLen), (void *)(&nsafs_login_pad[0]), |
| 283 | SHA_HASH_BYTES); |
| 284 | sha_clear(&state); |
| 285 | sha_hash(&state, shaBuffer, passwdLen + SHA_HASH_BYTES); |
| 286 | memcpy(shaBuffer, user, userLen); |
| 287 | memcpy(shaBuffer + userLen, cell, cellLen); |
| 288 | sha_bytes(&state, shaBuffer + userLen + cellLen); |
| 289 | sha_clear(&state); |
| 290 | sha_hash(&state, shaBuffer, userLen + cellLen + SHA_HASH_BYTES); |
| 291 | sha_bytes(&state, &cksum[0]); |
| 292 | memset(shaBuffer, 0, MAX(userLen + cellLen, passwdLen) + SHA_HASH_BYTES); |
| 293 | afs_osi_Free(shaBuffer, |
| 294 | MAX(userLen + cellLen, passwdLen) + SHA_HASH_BYTES); |
| 295 | } |
| 296 | |
| 297 | /* |
| 298 | * Set the AFS identity given from the group0 and group1 strings |
| 299 | */ |
| 300 | void |
| 301 | nsafs_set_id_from_ints(int viceid, int group0, int group1) |
| 302 | { |
| 303 | int i; |
| 304 | struct usr_ucred *crp; |
| 305 | |
| 306 | u.u_viceid = viceid; |
| 307 | crp = u.u_cred; |
| 308 | set_cr_uid(crp, viceid); |
| 309 | set_cr_ruid(crp, viceid); |
| 310 | crp->cr_suid = viceid; |
| 311 | crp->cr_groups[0] = group0; |
| 312 | crp->cr_groups[1] = group1; |
| 313 | crp->cr_groups[2] = getgid(); |
| 314 | crp->cr_ngroups = 1; |
| 315 | for (i = 3; i < NGROUPS; i++) { |
| 316 | crp->cr_groups[i] = NOGROUP; |
| 317 | } |
| 318 | } |
| 319 | |
| 320 | /* |
| 321 | * Set the AFS identity given from the viceid, group0 and group1 strings |
| 322 | */ |
| 323 | void |
| 324 | nsafs_set_id_from_strings(char *viceid, char *group0, char *group1) |
| 325 | { |
| 326 | int i; |
| 327 | struct usr_ucred *crp; |
| 328 | |
| 329 | if (viceid != NULL && group0 != NULL && group1 != NULL) { |
| 330 | nsafs_set_id_from_ints(atoi(viceid), atoi(group0), atoi(group1)); |
| 331 | } else { |
| 332 | u.u_viceid = getuid(); |
| 333 | crp = u.u_cred; |
| 334 | set_cr_uid(crp, getuid()); |
| 335 | set_cr_ruid(crp, getuid()); |
| 336 | crp->cr_suid = getuid(); |
| 337 | crp->cr_groups[0] = getgid(); |
| 338 | crp->cr_ngroups = 1; |
| 339 | for (i = 1; i < NGROUPS; i++) { |
| 340 | crp->cr_groups[i] = NOGROUP; |
| 341 | } |
| 342 | } |
| 343 | } |
| 344 | |
| 345 | /* |
| 346 | * Look up a login ID in the cache. If an entry name is found for the |
| 347 | * given username, and the SHA checksums match, then set the group0 |
| 348 | * and group1 parameters and return 1, otherwise return 0. |
| 349 | */ |
| 350 | int |
| 351 | nsafs_login_lookup(char *user, char *cell, char *cksum, int *viceid, |
| 352 | int *group0, int *group1) |
| 353 | { |
| 354 | int index; |
| 355 | long curTime; |
| 356 | struct nsafs_login *loginP, *tmpP, loginTmp; |
| 357 | |
| 358 | /* |
| 359 | * Search the hash chain for a matching entry, free |
| 360 | * expired entries as we search |
| 361 | */ |
| 362 | index = nsafs_login_hash(user, cell); |
| 363 | curTime = time(NULL); |
| 364 | crit_enter(nsafs_login_lock); |
| 365 | loginP = nsafs_login_cache[index].head; |
| 366 | while (loginP != NULL) { |
| 367 | if (loginP->expiration < curTime) { |
| 368 | tmpP = loginP; |
| 369 | loginP = tmpP->next; |
| 370 | nsafs_set_id_from_ints(tmpP->viceid, tmpP->group0, tmpP->group1); |
| 371 | uafs_unlog(); |
| 372 | DLL_DELETE(tmpP, nsafs_login_cache[index].head, |
| 373 | nsafs_login_cache[index].tail, next, prev); |
| 374 | afs_osi_Free(tmpP, sizeof(struct nsafs_login)); |
| 375 | continue; |
| 376 | } |
| 377 | if (strcmp(loginP->username, user) == 0 |
| 378 | && strcmp(loginP->cellname, cell) == 0 |
| 379 | && memcmp((void *)&loginP->cksum[0], (void *)cksum, |
| 380 | SHA_HASH_BYTES) == 0) { |
| 381 | *viceid = loginP->viceid; |
| 382 | *group0 = loginP->group0; |
| 383 | *group1 = loginP->group1; |
| 384 | crit_exit(nsafs_login_lock); |
| 385 | return 1; |
| 386 | } |
| 387 | loginP = loginP->next; |
| 388 | } |
| 389 | crit_exit(nsafs_login_lock); |
| 390 | return 0; |
| 391 | } |
| 392 | |
| 393 | /* |
| 394 | * Insert a login ID into the cache. If the user already has an entry, |
| 395 | * then overwrite the old entry. |
| 396 | */ |
| 397 | int |
| 398 | nsafs_login_store(char *user, char *cell, char *cksum, int viceid, int group0, |
| 399 | int group1, afs_uint32 expiration) |
| 400 | { |
| 401 | int index; |
| 402 | long curTime; |
| 403 | struct nsafs_login *loginP, *tmpP, loginTmp; |
| 404 | |
| 405 | /* |
| 406 | * Search the hash chain for a matching entry, free |
| 407 | * expired entries as we search |
| 408 | */ |
| 409 | index = nsafs_login_hash(user, cell); |
| 410 | curTime = time(NULL); |
| 411 | crit_enter(nsafs_login_lock); |
| 412 | loginP = nsafs_login_cache[index].head; |
| 413 | while (loginP != NULL) { |
| 414 | if (strcmp(loginP->username, user) == 0 |
| 415 | && strcmp(loginP->cellname, cell) == 0) { |
| 416 | break; |
| 417 | } |
| 418 | if (loginP->expiration < curTime) { |
| 419 | tmpP = loginP; |
| 420 | loginP = tmpP->next; |
| 421 | nsafs_set_id_from_ints(tmpP->viceid, tmpP->group0, tmpP->group1); |
| 422 | uafs_unlog(); |
| 423 | DLL_DELETE(tmpP, nsafs_login_cache[index].head, |
| 424 | nsafs_login_cache[index].tail, next, prev); |
| 425 | afs_osi_Free(tmpP, sizeof(struct nsafs_login)); |
| 426 | continue; |
| 427 | } |
| 428 | loginP = loginP->next; |
| 429 | } |
| 430 | if (loginP == NULL) { |
| 431 | loginP = (struct nsafs_login *) |
| 432 | afs_osi_Alloc(sizeof(struct nsafs_login)); |
| 433 | strcpy(&loginP->username[0], user); |
| 434 | strcpy(&loginP->cellname[0], cell); |
| 435 | } else { |
| 436 | DLL_DELETE(loginP, nsafs_login_cache[index].head, |
| 437 | nsafs_login_cache[index].tail, next, prev); |
| 438 | nsafs_set_id_from_ints(loginP->viceid, loginP->group0, |
| 439 | loginP->group1); |
| 440 | uafs_unlog(); |
| 441 | } |
| 442 | nsafs_set_id_from_ints(viceid, group0, group1); |
| 443 | memcpy((void *)&loginP->cksum[0], (void *)cksum, SHA_HASH_BYTES); |
| 444 | loginP->viceid = viceid; |
| 445 | loginP->group0 = group0; |
| 446 | loginP->group1 = group1; |
| 447 | loginP->expiration = expiration; |
| 448 | DLL_INSERT_TAIL(loginP, nsafs_login_cache[index].head, |
| 449 | nsafs_login_cache[index].tail, next, prev); |
| 450 | crit_exit(nsafs_login_lock); |
| 451 | return 0; |
| 452 | } |
| 453 | |
| 454 | /* |
| 455 | * Extract a string parameter from the parameter block |
| 456 | */ |
| 457 | int |
| 458 | nsafs_get_string(char **paramP, char *dflt, char *name, pblock * pb, |
| 459 | Session * sn, Request * rq) |
| 460 | { |
| 461 | char *tmpPtr; |
| 462 | char error[128]; |
| 463 | |
| 464 | tmpPtr = pblock_findval(name, pb); |
| 465 | if (tmpPtr == NULL) { |
| 466 | if (dflt == NULL) { |
| 467 | log_error(LOG_MISCONFIG, "nsafs", sn, rq, |
| 468 | "nsafs_init: please supply a %s parameter", name); |
| 469 | return REQ_ABORTED; |
| 470 | } else { |
| 471 | tmpPtr = dflt; |
| 472 | } |
| 473 | } |
| 474 | *paramP = afs_osi_Alloc(strlen(tmpPtr) + 1); |
| 475 | strcpy(*paramP, tmpPtr); |
| 476 | return REQ_PROCEED; |
| 477 | } |
| 478 | |
| 479 | /* |
| 480 | * Extract a long integer parameter from the parameter block |
| 481 | */ |
| 482 | int |
| 483 | nsafs_get_long(long *paramP, long dflt, char *name, pblock * pb, Session * sn, |
| 484 | Request * rq) |
| 485 | { |
| 486 | char *start, *end; |
| 487 | long val; |
| 488 | |
| 489 | start = pblock_findval(name, pb); |
| 490 | if (start == NULL) { |
| 491 | if (dflt < 0) { |
| 492 | log_error(LOG_MISCONFIG, "nsafs", sn, rq, |
| 493 | "nsafs_init: please supply a %s parameter", name); |
| 494 | return REQ_ABORTED; |
| 495 | } else { |
| 496 | *paramP = dflt; |
| 497 | return REQ_PROCEED; |
| 498 | } |
| 499 | } |
| 500 | val = strtol(start, &end, 10); |
| 501 | if (val <= 0 || end == start || *end != '\0') { |
| 502 | log_error(LOG_MISCONFIG, "nsafs", sn, rq, |
| 503 | "nsafs_init: invalid %s parameter '%s'", name, start); |
| 504 | return REQ_ABORTED; |
| 505 | } |
| 506 | *paramP = val; |
| 507 | return REQ_PROCEED; |
| 508 | } |
| 509 | |
| 510 | /* |
| 511 | * Extract an integer parameter from the parameter block |
| 512 | */ |
| 513 | int |
| 514 | nsafs_get_int(int *paramP, int dflt, char *name, pblock * pb, Session * sn, |
| 515 | Request * rq) |
| 516 | { |
| 517 | int code; |
| 518 | long val; |
| 519 | |
| 520 | code = nsafs_get_long(&val, (long)dflt, name, pb, sn, rq); |
| 521 | if (code == REQ_PROCEED) { |
| 522 | *paramP = val; |
| 523 | } |
| 524 | return code; |
| 525 | } |
| 526 | |
| 527 | /* |
| 528 | * Parse the authorization header for username and password |
| 529 | */ |
| 530 | void |
| 531 | nsafs_parse_authhdr(char *authHdr, char *user, char *cell, char *passwd) |
| 532 | { |
| 533 | int i; |
| 534 | char *p; |
| 535 | |
| 536 | user[0] = '\0'; |
| 537 | passwd[0] = '\0'; |
| 538 | cell[0] = '\0'; |
| 539 | |
| 540 | /* |
| 541 | * Skip leading blanks, check for basic authentication |
| 542 | */ |
| 543 | for (p = authHdr; *p == ' ' && *p != '\0'; p++); |
| 544 | if (strncasecmp(p, "basic ", 6) != 0) { |
| 545 | return; |
| 546 | } |
| 547 | for (p += 6; *p == ' '; p++); |
| 548 | |
| 549 | /* |
| 550 | * Username and password are base64 encoded |
| 551 | */ |
| 552 | nsafs_decode64(p); |
| 553 | |
| 554 | /* |
| 555 | * Format is user@cell:passwd. The user, cell or passwd may be missing |
| 556 | */ |
| 557 | for (i = 0; *p != '@' && *p != ':' && *p != '\0'; p++, i++) { |
| 558 | user[i] = *p; |
| 559 | } |
| 560 | user[i] = '\0'; |
| 561 | if (*p == '@') { |
| 562 | for (i = 0, p++; *p != ':' && *p != '\0'; p++, i++) { |
| 563 | cell[i] = *p; |
| 564 | } |
| 565 | cell[i] = '\0'; |
| 566 | } |
| 567 | if (*p == ':') { |
| 568 | for (i = 0, p++; *p != '\0'; p++, i++) { |
| 569 | passwd[i] = *p; |
| 570 | } |
| 571 | passwd[i] = '\0'; |
| 572 | } |
| 573 | } |
| 574 | |
| 575 | /* |
| 576 | * Return an appropriate error given a system errno |
| 577 | */ |
| 578 | int |
| 579 | nsafs_error_check(int code, char *text, pblock * pb, Session * sn, |
| 580 | Request * rq) |
| 581 | { |
| 582 | char txtbuf[256]; |
| 583 | char *realmBuf; |
| 584 | char *path; |
| 585 | char *tmp; |
| 586 | |
| 587 | if (text != NULL) { |
| 588 | sprintf(txtbuf, "%s: %s\n", text, strerror(code)); |
| 589 | } else { |
| 590 | sprintf(txtbuf, "%s\n", strerror(code)); |
| 591 | } |
| 592 | |
| 593 | /* |
| 594 | * Special case, if we get EACCES inside a public directory |
| 595 | * and are unauthenticated, change the error to EPERM unless |
| 596 | * nsafs_nocheck is set. If nsafs_nocheck is set then change |
| 597 | * EPERM to EACCES |
| 598 | */ |
| 599 | if (code == EACCES && pblock_findval("nsafs_nocheck", rq->vars) == NULL |
| 600 | && (pblock_findval("nsafs_viceid", rq->vars) == NULL |
| 601 | || pblock_findval("nsafs_group0", rq->vars) == NULL |
| 602 | || pblock_findval("nsafs_group1", rq->vars) == NULL)) { |
| 603 | code = EPERM; |
| 604 | } else if (code == EPERM |
| 605 | && pblock_findval("nsafs_nocheck", rq->vars) == NULL) { |
| 606 | char *status = pblock_findval("status", rq->vars); |
| 607 | if (strcmp(status, "Login Failed")) |
| 608 | code = EACCES; |
| 609 | } |
| 610 | |
| 611 | switch (code) { |
| 612 | case EPERM: |
| 613 | /* |
| 614 | * We overload EPERM (not super-user) to mean unauthenticated. |
| 615 | * We use the first subdirectory beneath the AFS mount point |
| 616 | * as the realm. |
| 617 | */ |
| 618 | log_error(LOG_SECURITY, "nsafs", sn, rq, txtbuf); |
| 619 | protocol_status(sn, rq, PROTOCOL_UNAUTHORIZED, NULL); |
| 620 | path = pblock_findval("path", rq->vars); |
| 621 | realmBuf = NULL; |
| 622 | if (path != NULL) { |
| 623 | path = uafs_afsPathName(path); |
| 624 | } |
| 625 | if (path != NULL && *path != '\0') { |
| 626 | realmBuf = strdup(path); |
| 627 | } |
| 628 | if (realmBuf == NULL) { |
| 629 | /* Don't dump core, just make AFS into one big realm */ |
| 630 | sprintf(txtbuf, "Basic realm=\"%s\"", afs_mountDir); |
| 631 | } else { |
| 632 | /* extract the first subdirectory in AFS */ |
| 633 | if ((tmp = strchr(realmBuf, '/')) != NULL) |
| 634 | *tmp = '\0'; |
| 635 | sprintf(txtbuf, "Basic realm=\"%s/%s\"", afs_mountDir, realmBuf); |
| 636 | free(realmBuf); |
| 637 | } |
| 638 | pblock_nvinsert("WWW-authenticate", txtbuf, rq->srvhdrs); |
| 639 | break; |
| 640 | case EACCES: |
| 641 | log_error(LOG_SECURITY, "nsafs", sn, rq, txtbuf); |
| 642 | protocol_status(sn, rq, PROTOCOL_FORBIDDEN, NULL); |
| 643 | break; |
| 644 | case ENOENT: |
| 645 | case ENOTDIR: |
| 646 | log_error(LOG_INFORM, "nsafs", sn, rq, txtbuf); |
| 647 | protocol_status(sn, rq, PROTOCOL_NOT_FOUND, NULL); |
| 648 | break; |
| 649 | default: |
| 650 | log_error(LOG_FAILURE, "nsafs", sn, rq, txtbuf); |
| 651 | protocol_status(sn, rq, PROTOCOL_SERVER_ERROR, NULL); |
| 652 | break; |
| 653 | } |
| 654 | return REQ_ABORTED; |
| 655 | } |
| 656 | |
| 657 | /* |
| 658 | * Check the preconditions on a request. Return REQ_PROCEED |
| 659 | * if the preconditions are met. Any other return value means |
| 660 | * that the request has been aborted. |
| 661 | */ |
| 662 | int |
| 663 | nsafs_check_preconditions(struct stat *stp, pblock * pb, Session * sn, |
| 664 | Request * rq) |
| 665 | { |
| 666 | int code; |
| 667 | time_t mtime; |
| 668 | struct tm tms, *tmsp; |
| 669 | char *reqhdr; |
| 670 | |
| 671 | mtime = stp->st_mtime; |
| 672 | tmsp = system_gmtime(&mtime, &tms); |
| 673 | |
| 674 | request_header("if-modified-since", &reqhdr, sn, rq); |
| 675 | if (reqhdr != NULL && util_later_than(tmsp, reqhdr)) { |
| 676 | protocol_status(sn, rq, PROTOCOL_NOT_MODIFIED, NULL); |
| 677 | return REQ_ABORTED; |
| 678 | } |
| 679 | |
| 680 | request_header("if-unmodified-since", &reqhdr, sn, rq); |
| 681 | if (reqhdr != NULL && !util_later_than(tmsp, reqhdr)) { |
| 682 | protocol_status(sn, rq, PROTOCOL_PRECONDITION_FAIL, NULL); |
| 683 | return REQ_ABORTED; |
| 684 | } |
| 685 | |
| 686 | return REQ_PROCEED; |
| 687 | } |
| 688 | |
| 689 | /* |
| 690 | * Set the content-length and last-modified response header |
| 691 | * |
| 692 | * We used to call protocol_set_finfo, but it wasn't handling |
| 693 | * if-unmodified-since headers correctly. |
| 694 | */ |
| 695 | int |
| 696 | nsafs_set_finfo(Session * sn, Request * rq, struct stat *stp) |
| 697 | { |
| 698 | int code; |
| 699 | time_t mtime; |
| 700 | struct tm tms, *tmsp; |
| 701 | char *reqhdr; |
| 702 | char dateStr[128]; |
| 703 | char *days[] = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" }; |
| 704 | char *months[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", |
| 705 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" |
| 706 | }; |
| 707 | |
| 708 | mtime = stp->st_mtime; |
| 709 | tmsp = system_gmtime(&mtime, &tms); |
| 710 | sprintf(&dateStr[0], "%s, %02d %s %d %02d:%02d:%02d GMT", |
| 711 | days[tmsp->tm_wday], tmsp->tm_mday, months[tmsp->tm_mon], |
| 712 | tmsp->tm_year + 1900, tmsp->tm_hour, tmsp->tm_min, tmsp->tm_sec); |
| 713 | pblock_nvinsert("Last-Modified", &dateStr[0], rq->srvhdrs); |
| 714 | pblock_nninsert("Content-Length", stp->st_size, rq->srvhdrs); |
| 715 | |
| 716 | return REQ_PROCEED; |
| 717 | } |
| 718 | |
| 719 | /* |
| 720 | * Initialize the AFS plugin. We do not initialize the AFS client |
| 721 | * here because we are still in the parent process. We don't |
| 722 | * initialize AFS until we get the first service request. |
| 723 | */ |
| 724 | NSAPI_PUBLIC int |
| 725 | nsafs_init(pblock * pb, Session * sn, Request * rq) |
| 726 | { |
| 727 | int code; |
| 728 | |
| 729 | nsafs_init_done = 0; |
| 730 | nsafs_init_lock = crit_init(); |
| 731 | |
| 732 | /* |
| 733 | * Parse the startup parameters |
| 734 | */ |
| 735 | code = nsafs_get_string(&mountDirParam, "/afs", "mount", pb, sn, rq); |
| 736 | if (code != REQ_PROCEED) { |
| 737 | return code; |
| 738 | } |
| 739 | code = nsafs_get_string(&cellNameParam, NULL, "cell", pb, sn, rq); |
| 740 | if (code != REQ_PROCEED) { |
| 741 | return code; |
| 742 | } |
| 743 | code = nsafs_get_string(&confDirParam, NULL, "confdir", pb, sn, rq); |
| 744 | if (code != REQ_PROCEED) { |
| 745 | return code; |
| 746 | } |
| 747 | code = nsafs_get_string(&cacheBaseDirParam, NULL, "cachedir", pb, sn, rq); |
| 748 | if (code != REQ_PROCEED) { |
| 749 | return code; |
| 750 | } |
| 751 | code = nsafs_get_int(&cacheBlocksParam, -1, "blocks", pb, sn, rq); |
| 752 | if (code != REQ_PROCEED) { |
| 753 | return code; |
| 754 | } |
| 755 | code = nsafs_get_int(&cacheFilesParam, 0, "files", pb, sn, rq); |
| 756 | if (code != REQ_PROCEED) { |
| 757 | return code; |
| 758 | } |
| 759 | code = nsafs_get_int(&cacheStatEntriesParam, -1, "stat", pb, sn, rq); |
| 760 | if (code != REQ_PROCEED) { |
| 761 | return code; |
| 762 | } |
| 763 | code = nsafs_get_int(&nDaemonsParam, -1, "daemons", pb, sn, rq); |
| 764 | if (code != REQ_PROCEED) { |
| 765 | return code; |
| 766 | } |
| 767 | code = nsafs_get_int(&dCacheSizeParam, 0, "dcache", pb, sn, rq); |
| 768 | if (code != REQ_PROCEED) { |
| 769 | return code; |
| 770 | } |
| 771 | code = nsafs_get_int(&vCacheSizeParam, 0, "volumes", pb, sn, rq); |
| 772 | if (code != REQ_PROCEED) { |
| 773 | return code; |
| 774 | } |
| 775 | code = nsafs_get_int(&chunkSizeParam, 0, "chunksize", pb, sn, rq); |
| 776 | if (code != REQ_PROCEED) { |
| 777 | return code; |
| 778 | } |
| 779 | code = nsafs_get_int(&debugParam, 0, "debug", pb, sn, rq); |
| 780 | if (code != REQ_PROCEED) { |
| 781 | return code; |
| 782 | } |
| 783 | code = nsafs_get_string(&logFileParam, NULL, "logfile", pb, sn, rq); |
| 784 | if (code != REQ_PROCEED) { |
| 785 | return code; |
| 786 | } |
| 787 | code = |
| 788 | nsafs_get_long(&maxExpirationParam, LONG_MAX, "exp-max", pb, sn, rq); |
| 789 | if (code != REQ_PROCEED) { |
| 790 | return code; |
| 791 | } |
| 792 | |
| 793 | return REQ_PROCEED; |
| 794 | } |
| 795 | |
| 796 | /* |
| 797 | * Extract name strings from a comma separated list |
| 798 | */ |
| 799 | char * |
| 800 | nsafs_NameFromNames(char *last, char *list, int *pos) |
| 801 | { |
| 802 | int len; |
| 803 | char *start; |
| 804 | char *retVal; |
| 805 | |
| 806 | if (last == NULL) { |
| 807 | *pos = 0; |
| 808 | } else { |
| 809 | afs_osi_Free(last, strlen(last) + 1); |
| 810 | } |
| 811 | start = &list[*pos]; |
| 812 | if (*start == '\0') { |
| 813 | return NULL; |
| 814 | } |
| 815 | for (len = 0; start[len] != ',' && start[len] != '\0'; len++); |
| 816 | *pos += len; |
| 817 | if (list[*pos] == ',') { |
| 818 | *pos += 1; |
| 819 | } |
| 820 | retVal = afs_osi_Alloc(len + 1); |
| 821 | memcpy(retVal, start, len); |
| 822 | retVal[len] = '\0'; |
| 823 | return retVal; |
| 824 | } |
| 825 | |
| 826 | /* |
| 827 | * Authcheck function for AFS |
| 828 | * |
| 829 | * Check for an Authorization header. If there is one then do the |
| 830 | * AFS login and place the first two groups in the user's creds |
| 831 | * into the nsafs-group1 and nsafs-group2 request variables. |
| 832 | * Send an Unauthorized response if login fails to prompt the user |
| 833 | * to reenter the username and password. |
| 834 | */ |
| 835 | NSAPI_PUBLIC int |
| 836 | nsafs_basic(pblock * pb, Session * sn, Request * rq) |
| 837 | { |
| 838 | int i; |
| 839 | int rc; |
| 840 | int code; |
| 841 | int pos; |
| 842 | char *authHdr; |
| 843 | char *cellP; |
| 844 | char user[NSAFS_USERNAME_MAX]; |
| 845 | char cell[NSAFS_USERNAME_MAX]; |
| 846 | char passwd[NSAFS_PASSWORD_MAX]; |
| 847 | char cksum[SHA_HASH_BYTES]; |
| 848 | struct usr_ucred *crp; |
| 849 | afs_int32 password_expires = -1; |
| 850 | int viceid; |
| 851 | int group0; |
| 852 | int group1; |
| 853 | afs_uint32 expiration; |
| 854 | char *reason; |
| 855 | char txtbuf[128]; |
| 856 | |
| 857 | if (nsafs_init_done == 0) { |
| 858 | nsafs_init_once(); |
| 859 | } |
| 860 | |
| 861 | /* |
| 862 | * Get the authorization header, if none found then continue, |
| 863 | * we check whether authorization is required later on. |
| 864 | */ |
| 865 | request_header("authorization", &authHdr, sn, rq); |
| 866 | if (authHdr == NULL || strlen(authHdr) == 0) { |
| 867 | return REQ_NOACTION; |
| 868 | } |
| 869 | |
| 870 | /* |
| 871 | * Get the user name and password from the authorization header |
| 872 | */ |
| 873 | nsafs_parse_authhdr(authHdr, &user[0], &cell[0], &passwd[0]); |
| 874 | if (user[0] == '\0' || passwd[0] == '\0') { |
| 875 | memset((void *)&passwd[0], 0, NSAFS_PASSWORD_MAX); |
| 876 | pblock_nvinsert("status", "Login Failed", rq->vars); |
| 877 | return nsafs_error_check(EPERM, "Invalid auth header", pb, sn, rq); |
| 878 | } |
| 879 | if (cell[0] == '\0') { |
| 880 | strcpy(cell, afs_LclCellName); |
| 881 | } |
| 882 | |
| 883 | /* |
| 884 | * Lookup the username and password in the login cache. |
| 885 | * If we find a match we reuse the existing identity. |
| 886 | */ |
| 887 | nsafs_login_checksum(user, cell, passwd, &cksum[0]); |
| 888 | rc = nsafs_login_lookup(user, cell, cksum, &viceid, &group0, &group1); |
| 889 | if (rc != 0) { |
| 890 | pblock_nninsert("nsafs_viceid", viceid, rq->vars); |
| 891 | pblock_nninsert("nsafs_group0", group0, rq->vars); |
| 892 | pblock_nninsert("nsafs_group1", group1, rq->vars); |
| 893 | memset((void *)&passwd[0], 0, NSAFS_PASSWORD_MAX); |
| 894 | return REQ_PROCEED; |
| 895 | } |
| 896 | |
| 897 | /* |
| 898 | * Make sure the user is from one of the cells we are configured for |
| 899 | */ |
| 900 | cellP = nsafs_NameFromNames(NULL, cellNameParam, &pos); |
| 901 | while (cellP != NULL) { |
| 902 | if (strcmp(cellP, cell) == 0) { |
| 903 | break; |
| 904 | } |
| 905 | cellP = nsafs_NameFromNames(cellP, cellNameParam, &pos); |
| 906 | } |
| 907 | if (cellP == NULL) { |
| 908 | memset((void *)&passwd[0], 0, NSAFS_PASSWORD_MAX); |
| 909 | pblock_nvinsert("status", "Login Failed", rq->vars); |
| 910 | return nsafs_error_check(EPERM, "Invalid cell", pb, sn, rq); |
| 911 | } |
| 912 | afs_osi_Free(cellP, strlen(cellP) + 1); |
| 913 | |
| 914 | u.u_expiration = 0; |
| 915 | nsafs_set_id_from_strings(NULL, NULL, NULL); |
| 916 | code = uafs_klog(user, cell, passwd, &reason); |
| 917 | memset((void *)&passwd[0], 0, NSAFS_PASSWORD_MAX); |
| 918 | if (code != 0) { |
| 919 | #if 0 |
| 920 | sprintf(txtbuf, "%s@%s: %s\n", user, cell, reason); |
| 921 | pblock_nvinsert("status", "Login Failed", rq->vars); |
| 922 | return nsafs_error_check(EPERM, txtbuf, pb, sn, rq); |
| 923 | #else /* 0 */ |
| 924 | return REQ_PROCEED; |
| 925 | #endif /* 0 */ |
| 926 | } |
| 927 | expiration = u.u_expiration; |
| 928 | usr_assert(expiration != 0); |
| 929 | expiration = |
| 930 | MIN(expiration, (afs_uint32) (time(NULL) + maxExpirationParam)); |
| 931 | |
| 932 | /* |
| 933 | * Insert the credentials into the login cache |
| 934 | */ |
| 935 | pblock_nvinsert("auth-type", "basic", rq->vars); |
| 936 | pblock_nvinsert("auth-user", user, rq->vars); |
| 937 | pblock_nninsert("nsafs_viceid", u.u_viceid, rq->vars); |
| 938 | pblock_nninsert("nsafs_group0", u.u_cred->cr_groups[0], rq->vars); |
| 939 | pblock_nninsert("nsafs_group1", u.u_cred->cr_groups[1], rq->vars); |
| 940 | nsafs_login_store(user, cell, cksum, u.u_viceid, u.u_cred->cr_groups[0], |
| 941 | u.u_cred->cr_groups[1], expiration); |
| 942 | |
| 943 | return REQ_PROCEED; |
| 944 | } |
| 945 | |
| 946 | /* |
| 947 | * Name trans function for AFS |
| 948 | * |
| 949 | * Terminates the name translation step for files in AFS. |
| 950 | * Puts the AFS pathname into path and into ppath request vars. |
| 951 | */ |
| 952 | NSAPI_PUBLIC int |
| 953 | nsafs_mount(pblock * pb, Session * sn, Request * rq) |
| 954 | { |
| 955 | char *reqUri; |
| 956 | char *newReqUri; |
| 957 | int isAfsPath; |
| 958 | |
| 959 | /* |
| 960 | * Get the URI from the request block |
| 961 | */ |
| 962 | reqUri = pblock_findval("uri", rq->reqpb); |
| 963 | if (reqUri == NULL) { |
| 964 | return REQ_NOACTION; |
| 965 | } |
| 966 | |
| 967 | if (uafs_afsPathName(reqUri) == NULL) { |
| 968 | isAfsPath = 0; |
| 969 | } else { |
| 970 | isAfsPath = 1; |
| 971 | } |
| 972 | |
| 973 | /* |
| 974 | * If we have a new-url parameter then the new-url may be in AFS |
| 975 | * if and only if the path is in AFS |
| 976 | */ |
| 977 | request_header("new-url", &newReqUri, sn, rq); |
| 978 | if (newReqUri != NULL) { |
| 979 | if (util_uri_is_evil(newReqUri)) { |
| 980 | util_uri_parse(newReqUri); |
| 981 | } |
| 982 | if (uafs_afsPathName(newReqUri) != NULL) { |
| 983 | if (!isAfsPath) { |
| 984 | /* |
| 985 | * We do not support moving files in or out of AFS |
| 986 | */ |
| 987 | log_error(LOG_INFORM, "nsafs", sn, rq, "new-URL not in AFS"); |
| 988 | protocol_status(sn, rq, PROTOCOL_NOT_IMPLEMENTED, NULL); |
| 989 | return REQ_ABORTED; |
| 990 | } else { |
| 991 | pblock_nvinsert("newpath", newReqUri, rq->vars); |
| 992 | } |
| 993 | } else if (isAfsPath) { |
| 994 | /* |
| 995 | * We do not support moving files in or out of AFS |
| 996 | */ |
| 997 | log_error(LOG_INFORM, "nsafs", sn, rq, "new-URL not in AFS"); |
| 998 | protocol_status(sn, rq, PROTOCOL_NOT_IMPLEMENTED, NULL); |
| 999 | return REQ_ABORTED; |
| 1000 | } |
| 1001 | } else if (!isAfsPath) { |
| 1002 | return REQ_NOACTION; |
| 1003 | } |
| 1004 | |
| 1005 | /* |
| 1006 | * This is an AFS request |
| 1007 | */ |
| 1008 | pblock_nvinsert("path", reqUri, rq->vars); |
| 1009 | pblock_nvinsert("ppath", reqUri, rq->vars); |
| 1010 | return REQ_PROCEED; |
| 1011 | } |
| 1012 | |
| 1013 | /* |
| 1014 | * Allow unauthorized users to access a specific directory in AFS |
| 1015 | */ |
| 1016 | NSAPI_PUBLIC int |
| 1017 | nsafs_public(pblock * pb, Session * sn, Request * rq) |
| 1018 | { |
| 1019 | char *path; |
| 1020 | char *public; |
| 1021 | int pubLen; |
| 1022 | |
| 1023 | path = pblock_findval("path", rq->vars); |
| 1024 | if (path == NULL) { |
| 1025 | return REQ_NOACTION; |
| 1026 | } |
| 1027 | public = pblock_findval("public", pb); |
| 1028 | if (public == NULL) { |
| 1029 | return REQ_NOACTION; |
| 1030 | } |
| 1031 | |
| 1032 | /* |
| 1033 | * if the path is in AFS and is in the given directory then allow access |
| 1034 | */ |
| 1035 | if (util_uri_is_evil(path)) { |
| 1036 | util_uri_parse(path); |
| 1037 | } |
| 1038 | if (uafs_afsPathName(path) == NULL) { |
| 1039 | return REQ_NOACTION; |
| 1040 | } |
| 1041 | if (util_uri_is_evil(public)) { |
| 1042 | util_uri_parse(public); |
| 1043 | } |
| 1044 | pubLen = strlen(public); |
| 1045 | if (strncmp(path, public, pubLen) != 0 |
| 1046 | || (path[pubLen] != '/' && path[pubLen] != '\0')) { |
| 1047 | return REQ_NOACTION; |
| 1048 | } |
| 1049 | if (pblock_findval("nsafs_viceid", rq->vars) == NULL |
| 1050 | || pblock_findval("nsafs_group0", rq->vars) == NULL |
| 1051 | || pblock_findval("nsafs_group1", rq->vars) == NULL) { |
| 1052 | pblock_nvinsert("nsafs_public", "TRUE", rq->vars); |
| 1053 | } |
| 1054 | return REQ_PROCEED; |
| 1055 | } |
| 1056 | |
| 1057 | /* |
| 1058 | * Identify a path that should be an authentication realm. |
| 1059 | */ |
| 1060 | NSAPI_PUBLIC int |
| 1061 | nsafs_realm(pblock * pb, Session * sn, Request * rq) |
| 1062 | { |
| 1063 | char *path; |
| 1064 | char *realm; |
| 1065 | int pathLen; |
| 1066 | |
| 1067 | /* |
| 1068 | * Ignore matches for the current path once we find a realm |
| 1069 | * line that matches this path. |
| 1070 | */ |
| 1071 | realm = pblock_findval("nsafs_realm", rq->vars); |
| 1072 | if (realm != NULL) { |
| 1073 | return REQ_NOACTION; |
| 1074 | } |
| 1075 | |
| 1076 | path = pblock_findval("path", rq->vars); |
| 1077 | if (path == NULL) { |
| 1078 | return REQ_NOACTION; |
| 1079 | } |
| 1080 | if (util_uri_is_evil(path)) { |
| 1081 | util_uri_parse(path); |
| 1082 | } |
| 1083 | if (uafs_afsPathName(path) == NULL) { |
| 1084 | return REQ_NOACTION; |
| 1085 | } |
| 1086 | |
| 1087 | realm = pblock_findval("path", pb); |
| 1088 | if (realm == NULL) { |
| 1089 | return REQ_NOACTION; |
| 1090 | } |
| 1091 | if (util_uri_is_evil(realm)) { |
| 1092 | util_uri_parse(realm); |
| 1093 | } |
| 1094 | |
| 1095 | pathLen = strlen(realm); |
| 1096 | if (strncmp(path, realm, pathLen) != 0 |
| 1097 | || (path[pathLen] != '/' && path[pathLen] != '\0')) { |
| 1098 | return REQ_NOACTION; |
| 1099 | } |
| 1100 | pblock_nvinsert("nsafs_realm", realm, rq->vars); |
| 1101 | return REQ_PROCEED; |
| 1102 | } |
| 1103 | |
| 1104 | /* |
| 1105 | * Check whether any path elements beneath the nolinks directory |
| 1106 | * are symbolic links. Return REQ_PROCEED if no links are found. |
| 1107 | */ |
| 1108 | int |
| 1109 | nsafs_check_for_links(char *path, char *nolinks, pblock * pb, Session * sn, |
| 1110 | Request * rq) |
| 1111 | { |
| 1112 | int rc; |
| 1113 | int code; |
| 1114 | int dirLen; |
| 1115 | char *tmpPath; |
| 1116 | int allocSize; |
| 1117 | int pathLen; |
| 1118 | struct stat st; |
| 1119 | |
| 1120 | /* |
| 1121 | * Check each component of the path below the nolinks directory. |
| 1122 | */ |
| 1123 | dirLen = strlen(nolinks); |
| 1124 | pathLen = strlen(path); |
| 1125 | if (pathLen < dirLen || strncmp(path, nolinks, dirLen) != 0 |
| 1126 | || (path[dirLen] != '/' && path[dirLen] != '\0')) { |
| 1127 | return REQ_PROCEED; |
| 1128 | } |
| 1129 | if (path[dirLen] == '/') { |
| 1130 | dirLen++; |
| 1131 | } |
| 1132 | |
| 1133 | allocSize = pathLen + 1; |
| 1134 | tmpPath = (char *)afs_osi_Alloc(allocSize); |
| 1135 | strcpy(tmpPath, path); |
| 1136 | while (tmpPath[pathLen] == '/' && pathLen > dirLen) { |
| 1137 | tmpPath[pathLen] = '\0'; |
| 1138 | pathLen--; |
| 1139 | } |
| 1140 | while (pathLen > dirLen) { |
| 1141 | rc = uafs_lstat(tmpPath, &st); |
| 1142 | if (rc < 0) { |
| 1143 | code = errno; |
| 1144 | afs_osi_Free(tmpPath, allocSize); |
| 1145 | return nsafs_error_check(code, NULL, pb, sn, rq); |
| 1146 | } |
| 1147 | if ((st.st_mode & S_IFMT) == S_IFLNK) { |
| 1148 | afs_osi_Free(tmpPath, allocSize); |
| 1149 | return nsafs_error_check(ENOENT, NULL, pb, sn, rq); |
| 1150 | } |
| 1151 | while (tmpPath[pathLen] != '/' && pathLen > dirLen) { |
| 1152 | tmpPath[pathLen] = '\0'; |
| 1153 | pathLen--; |
| 1154 | } |
| 1155 | while (tmpPath[pathLen] == '/' && pathLen > dirLen) { |
| 1156 | tmpPath[pathLen] = '\0'; |
| 1157 | pathLen--; |
| 1158 | } |
| 1159 | } |
| 1160 | afs_osi_Free(tmpPath, allocSize); |
| 1161 | return REQ_PROCEED; |
| 1162 | } |
| 1163 | |
| 1164 | /* |
| 1165 | * Deny access to symbolic links in a directory or its descendents. |
| 1166 | */ |
| 1167 | NSAPI_PUBLIC int |
| 1168 | nsafs_nolinks(pblock * pb, Session * sn, Request * rq) |
| 1169 | { |
| 1170 | int code; |
| 1171 | char *path; |
| 1172 | char *newPath; |
| 1173 | char *nolinks; |
| 1174 | char *viceid; |
| 1175 | char *group0; |
| 1176 | char *group1; |
| 1177 | |
| 1178 | path = pblock_findval("path", rq->vars); |
| 1179 | if (path == NULL) { |
| 1180 | return REQ_NOACTION; |
| 1181 | } |
| 1182 | nolinks = pblock_findval("nolinks", pb); |
| 1183 | if (nolinks == NULL) { |
| 1184 | return REQ_NOACTION; |
| 1185 | } |
| 1186 | newPath = pblock_findval("newpath", rq->vars); |
| 1187 | |
| 1188 | /* |
| 1189 | * if the path is in AFS and is in the nolinks directory then deny access |
| 1190 | * to any symbolic links below the nolinks directory. |
| 1191 | */ |
| 1192 | if (util_uri_is_evil(path)) { |
| 1193 | util_uri_parse(path); |
| 1194 | } |
| 1195 | if (uafs_afsPathName(path) == NULL) { |
| 1196 | return REQ_NOACTION; |
| 1197 | } |
| 1198 | if (util_uri_is_evil(nolinks)) { |
| 1199 | util_uri_parse(nolinks); |
| 1200 | } |
| 1201 | |
| 1202 | /* |
| 1203 | * Check for group numbers in the request vars, otherwise use the |
| 1204 | * defaults |
| 1205 | */ |
| 1206 | viceid = pblock_findval("nsafs_viceid", rq->vars); |
| 1207 | group0 = pblock_findval("nsafs_group0", rq->vars); |
| 1208 | group1 = pblock_findval("nsafs_group1", rq->vars); |
| 1209 | nsafs_set_id_from_strings(viceid, group0, group1); |
| 1210 | |
| 1211 | code = nsafs_check_for_links(path, nolinks, pb, sn, rq); |
| 1212 | if (code != REQ_PROCEED) { |
| 1213 | return code; |
| 1214 | } |
| 1215 | |
| 1216 | if (newPath != NULL) { |
| 1217 | if (util_uri_is_evil(newPath)) { |
| 1218 | util_uri_parse(newPath); |
| 1219 | } |
| 1220 | if (uafs_afsPathName(newPath) == NULL) { |
| 1221 | return REQ_NOACTION; |
| 1222 | } |
| 1223 | code = nsafs_check_for_links(newPath, nolinks, pb, sn, rq); |
| 1224 | if (code != REQ_PROCEED) { |
| 1225 | return code; |
| 1226 | } |
| 1227 | } |
| 1228 | |
| 1229 | return REQ_NOACTION; |
| 1230 | } |
| 1231 | |
| 1232 | /* |
| 1233 | * Set the MIME type for files in AFS. |
| 1234 | */ |
| 1235 | NSAPI_PUBLIC int |
| 1236 | nsafs_force_type(pblock * pb, Session * sn, Request * rq) |
| 1237 | { |
| 1238 | char *path; |
| 1239 | char *dflt; |
| 1240 | |
| 1241 | path = pblock_findval("path", rq->vars); |
| 1242 | if (path == NULL) { |
| 1243 | return REQ_NOACTION; |
| 1244 | } |
| 1245 | dflt = pblock_findval("type", pb); |
| 1246 | if (dflt == NULL) { |
| 1247 | return REQ_NOACTION; |
| 1248 | } |
| 1249 | |
| 1250 | /* |
| 1251 | * If the path is in AFS then set the nsafs_variable in the |
| 1252 | * request variables. The nsafs_error_check routine only |
| 1253 | * sends an Unauthorized error if this variable is not set. |
| 1254 | */ |
| 1255 | if (util_uri_is_evil(path)) { |
| 1256 | util_uri_parse(path); |
| 1257 | } |
| 1258 | if (uafs_afsPathName(path) == NULL) { |
| 1259 | return REQ_NOACTION; |
| 1260 | } |
| 1261 | |
| 1262 | if (pblock_findval("content-type", rq->srvhdrs) == NULL) { |
| 1263 | pblock_nvinsert("content-type", dflt, rq->srvhdrs); |
| 1264 | } |
| 1265 | |
| 1266 | return REQ_PROCEED; |
| 1267 | } |
| 1268 | |
| 1269 | /* |
| 1270 | * Disable the Unauthorized response message so users never get |
| 1271 | * prompted for their name and password. |
| 1272 | */ |
| 1273 | NSAPI_PUBLIC int |
| 1274 | nsafs_nocheck(pblock * pb, Session * sn, Request * rq) |
| 1275 | { |
| 1276 | char *path; |
| 1277 | |
| 1278 | path = pblock_findval("path", rq->vars); |
| 1279 | if (path == NULL) { |
| 1280 | return REQ_NOACTION; |
| 1281 | } |
| 1282 | |
| 1283 | /* |
| 1284 | * If the path is in AFS then set the nsafs_variable in the |
| 1285 | * request variables. The nsafs_error_check routine only |
| 1286 | * sends an Unauthorized error if this variable is not set. |
| 1287 | */ |
| 1288 | if (util_uri_is_evil(path)) { |
| 1289 | util_uri_parse(path); |
| 1290 | } |
| 1291 | if (uafs_afsPathName(path) == NULL) { |
| 1292 | return REQ_NOACTION; |
| 1293 | } |
| 1294 | |
| 1295 | if (pblock_findval("nsafs_nocheck", rq->vars) == NULL) { |
| 1296 | pblock_nvinsert("nsafs_nocheck", "TRUE", rq->vars); |
| 1297 | } |
| 1298 | |
| 1299 | /* |
| 1300 | * If this is a public directory then proceed, otherwise access |
| 1301 | * is forbidden |
| 1302 | */ |
| 1303 | if (pblock_findval("nsafs_public", rq->vars) != NULL) { |
| 1304 | return REQ_PROCEED; |
| 1305 | } |
| 1306 | |
| 1307 | return nsafs_error_check(EACCES, NULL, pb, sn, rq); |
| 1308 | } |
| 1309 | |
| 1310 | /* |
| 1311 | * Require all requests for AFS files that are not explicitly made |
| 1312 | * public to be authenticated. |
| 1313 | */ |
| 1314 | NSAPI_PUBLIC int |
| 1315 | nsafs_check(pblock * pb, Session * sn, Request * rq) |
| 1316 | { |
| 1317 | char *path; |
| 1318 | |
| 1319 | path = pblock_findval("path", rq->vars); |
| 1320 | if (path == NULL) { |
| 1321 | return REQ_NOACTION; |
| 1322 | } |
| 1323 | |
| 1324 | /* |
| 1325 | * If the path is in AFS then require authentication |
| 1326 | */ |
| 1327 | if (util_uri_is_evil(path)) { |
| 1328 | util_uri_parse(path); |
| 1329 | } |
| 1330 | if (uafs_afsPathName(path) == NULL) { |
| 1331 | return REQ_NOACTION; |
| 1332 | } |
| 1333 | |
| 1334 | /* |
| 1335 | * If this is a public directory then proceed |
| 1336 | */ |
| 1337 | if (pblock_findval("nsafs_public", rq->vars) != NULL) { |
| 1338 | return REQ_PROCEED; |
| 1339 | } |
| 1340 | |
| 1341 | if (pblock_findval("nsafs_viceid", rq->vars) == NULL |
| 1342 | || pblock_findval("nsafs_group0", rq->vars) == NULL |
| 1343 | || pblock_findval("nsafs_group1", rq->vars) == NULL) { |
| 1344 | return nsafs_error_check(EPERM, NULL, pb, sn, rq); |
| 1345 | } |
| 1346 | |
| 1347 | return REQ_PROCEED; |
| 1348 | } |
| 1349 | |
| 1350 | /* |
| 1351 | * Find index files for directories |
| 1352 | */ |
| 1353 | NSAPI_PUBLIC int |
| 1354 | nsafs_find_index(pblock * pb, Session * sn, Request * rq) |
| 1355 | { |
| 1356 | char *path; |
| 1357 | char *indexNames; |
| 1358 | char *indexP; |
| 1359 | char *nameP; |
| 1360 | char *viceid; |
| 1361 | char *group0; |
| 1362 | char *group1; |
| 1363 | struct stat st; |
| 1364 | int rc; |
| 1365 | int code; |
| 1366 | int pos; |
| 1367 | |
| 1368 | path = pblock_findval("path", rq->vars); |
| 1369 | if (path == NULL) { |
| 1370 | return REQ_NOACTION; |
| 1371 | } |
| 1372 | |
| 1373 | indexNames = pblock_findval("index-names", pb); |
| 1374 | if (indexNames == NULL) { |
| 1375 | return REQ_NOACTION; |
| 1376 | } |
| 1377 | |
| 1378 | /* |
| 1379 | * Skip pathnames that don't end in a slash |
| 1380 | */ |
| 1381 | if (*path == '\0' || path[strlen(path) - 1] != '/') { |
| 1382 | return REQ_NOACTION; |
| 1383 | } |
| 1384 | |
| 1385 | /* |
| 1386 | * If the path is a directory then check if the directory has |
| 1387 | * an index file. |
| 1388 | */ |
| 1389 | if (util_uri_is_evil(path)) { |
| 1390 | util_uri_parse(path); |
| 1391 | } |
| 1392 | if (uafs_afsPathName(path) == NULL) { |
| 1393 | /* |
| 1394 | * Look for index files in local file system |
| 1395 | */ |
| 1396 | rc = stat(path, &st); |
| 1397 | if (rc < 0) { |
| 1398 | code = errno; |
| 1399 | return nsafs_error_check(code, NULL, pb, sn, rq); |
| 1400 | } |
| 1401 | |
| 1402 | if ((st.st_mode & S_IFMT) != S_IFDIR) { |
| 1403 | return REQ_NOACTION; |
| 1404 | } |
| 1405 | |
| 1406 | indexP = nsafs_NameFromNames(NULL, indexNames, &pos); |
| 1407 | while (indexP != NULL) { |
| 1408 | nameP = afs_osi_Alloc(strlen(path) + strlen(indexP) + 2); |
| 1409 | sprintf(nameP, "%s/%s", path, indexP); |
| 1410 | rc = stat(nameP, &st); |
| 1411 | if (rc == 0 && (st.st_mode & S_IFMT) != S_IFDIR) { |
| 1412 | param_free(pblock_remove("path", rq->vars)); |
| 1413 | pblock_nvinsert("path", nameP, rq->vars); |
| 1414 | afs_osi_Free(nameP, strlen(path) + strlen(indexP) + 2); |
| 1415 | afs_osi_Free(indexP, strlen(indexP) + 1); |
| 1416 | return REQ_PROCEED; |
| 1417 | } |
| 1418 | afs_osi_Free(nameP, strlen(path) + strlen(indexP) + 2); |
| 1419 | indexP = nsafs_NameFromNames(indexP, indexNames, &pos); |
| 1420 | } |
| 1421 | } else { |
| 1422 | /* |
| 1423 | * Check for group numbers in the request vars, otherwise use the |
| 1424 | * defaults |
| 1425 | */ |
| 1426 | viceid = pblock_findval("nsafs_viceid", rq->vars); |
| 1427 | group0 = pblock_findval("nsafs_group0", rq->vars); |
| 1428 | group1 = pblock_findval("nsafs_group1", rq->vars); |
| 1429 | nsafs_set_id_from_strings(viceid, group0, group1); |
| 1430 | |
| 1431 | /* |
| 1432 | * Look for index files in AFS |
| 1433 | */ |
| 1434 | rc = uafs_stat(path, &st); |
| 1435 | if (rc < 0) { |
| 1436 | code = errno; |
| 1437 | return nsafs_error_check(code, NULL, pb, sn, rq); |
| 1438 | } |
| 1439 | |
| 1440 | if ((st.st_mode & S_IFMT) != S_IFDIR) { |
| 1441 | return REQ_NOACTION; |
| 1442 | } |
| 1443 | |
| 1444 | indexP = nsafs_NameFromNames(NULL, indexNames, &pos); |
| 1445 | while (indexP != NULL) { |
| 1446 | nameP = afs_osi_Alloc(strlen(path) + strlen(indexP) + 2); |
| 1447 | sprintf(nameP, "%s/%s", path, indexP); |
| 1448 | rc = uafs_stat(nameP, &st); |
| 1449 | if (rc == 0 && (st.st_mode & S_IFMT) != S_IFDIR) { |
| 1450 | param_free(pblock_remove("path", rq->vars)); |
| 1451 | pblock_nvinsert("path", nameP, rq->vars); |
| 1452 | afs_osi_Free(nameP, strlen(path) + strlen(indexP) + 2); |
| 1453 | afs_osi_Free(indexP, strlen(indexP) + 1); |
| 1454 | return REQ_PROCEED; |
| 1455 | } |
| 1456 | afs_osi_Free(nameP, strlen(path) + strlen(indexP) + 2); |
| 1457 | indexP = nsafs_NameFromNames(indexP, indexNames, &pos); |
| 1458 | } |
| 1459 | } |
| 1460 | return REQ_NOACTION; |
| 1461 | } |
| 1462 | |
| 1463 | /* |
| 1464 | * Node in binary tree used to sort directory entries |
| 1465 | */ |
| 1466 | struct nsafs_tree { |
| 1467 | char *name; /* directory member name */ |
| 1468 | char *text; /* directory index text */ |
| 1469 | int allocLen; /* Size of this allocated block */ |
| 1470 | int textLen; /* Size of the text string */ |
| 1471 | int balance; /* used to balance binary trees */ |
| 1472 | struct nsafs_tree *left; |
| 1473 | struct nsafs_tree *right; |
| 1474 | }; |
| 1475 | |
| 1476 | #ifdef NSAFS_TREE_DEBUG |
| 1477 | /* |
| 1478 | * Validate that the given tree is a valid balanced binary tree |
| 1479 | */ |
| 1480 | int |
| 1481 | nsafs_tree_check(struct nsafs_tree *root) |
| 1482 | { |
| 1483 | int leftDepth; |
| 1484 | int rightDepth; |
| 1485 | int balance; |
| 1486 | |
| 1487 | if (root->left == NULL) { |
| 1488 | leftDepth = 0; |
| 1489 | } else { |
| 1490 | assert(strcmp(root->left->name, root->name) < 0); |
| 1491 | leftDepth = nsafs_tree_check(root->left); |
| 1492 | } |
| 1493 | if (root->right == NULL) { |
| 1494 | rightDepth = 0; |
| 1495 | } else { |
| 1496 | assert(strcmp(root->right->name, root->name) >= 0); |
| 1497 | rightDepth = nsafs_tree_check(root->right); |
| 1498 | } |
| 1499 | balance = rightDepth - leftDepth; |
| 1500 | assert(balance == root->balance); |
| 1501 | assert(balance >= -1); |
| 1502 | assert(balance <= 1); |
| 1503 | return (MAX(leftDepth, rightDepth) + 1); |
| 1504 | } |
| 1505 | #endif /* NSAFS_TREE_DEBUG */ |
| 1506 | |
| 1507 | /* |
| 1508 | * Insert a node into the balanced binary tree of directory entries. |
| 1509 | * rootP is the address of the parent's pointer to this node. |
| 1510 | * Returns the change in depth of this tree (0 or 1) |
| 1511 | */ |
| 1512 | int |
| 1513 | nsafs_node_insert(struct nsafs_tree *newNode, struct nsafs_tree **rootP) |
| 1514 | { |
| 1515 | struct nsafs_tree *thisNode; |
| 1516 | int delta; |
| 1517 | |
| 1518 | thisNode = *rootP; |
| 1519 | if (strcmp(newNode->name, thisNode->name) < 0) { |
| 1520 | /* |
| 1521 | * Insert left |
| 1522 | */ |
| 1523 | if (thisNode->left == NULL) { |
| 1524 | thisNode->left = newNode; |
| 1525 | if (thisNode->right == NULL) { |
| 1526 | thisNode->balance = -1; |
| 1527 | return 1; |
| 1528 | } else { |
| 1529 | thisNode->balance = 0; |
| 1530 | return 0; |
| 1531 | } |
| 1532 | } else { |
| 1533 | delta = nsafs_node_insert(newNode, &thisNode->left); |
| 1534 | if (delta == 0) { |
| 1535 | return 0; |
| 1536 | } |
| 1537 | thisNode->balance -= delta; |
| 1538 | if (thisNode->balance == -2) { |
| 1539 | /* |
| 1540 | * rotate right |
| 1541 | */ |
| 1542 | if (thisNode->left->balance > 0) { |
| 1543 | #ifdef NSAFS_TREE_DEBUG |
| 1544 | printf("rotate left, line %d\n", __LINE__); |
| 1545 | #endif /* NSAFS_TREE_DEBUG */ |
| 1546 | *rootP = thisNode->left->right; |
| 1547 | if ((*rootP)->balance > 0) { |
| 1548 | thisNode->left->balance = -(*rootP)->balance; |
| 1549 | (*rootP)->balance = 0; |
| 1550 | thisNode->balance = 0; |
| 1551 | } else { |
| 1552 | thisNode->left->balance = 0; |
| 1553 | thisNode->balance = -(*rootP)->balance; |
| 1554 | (*rootP)->balance = 0; |
| 1555 | } |
| 1556 | thisNode->left->right = (*rootP)->left; |
| 1557 | (*rootP)->left = thisNode->left; |
| 1558 | thisNode->left = (*rootP)->right; |
| 1559 | (*rootP)->right = thisNode; |
| 1560 | } else { |
| 1561 | #ifdef NSAFS_TREE_DEBUG |
| 1562 | printf("rotate left, line %d\n", __LINE__); |
| 1563 | #endif /* NSAFS_TREE_DEBUG */ |
| 1564 | *rootP = thisNode->left; |
| 1565 | (*rootP)->balance = 0; |
| 1566 | thisNode->balance = 0; |
| 1567 | thisNode->left = (*rootP)->right; |
| 1568 | (*rootP)->right = thisNode; |
| 1569 | } |
| 1570 | return 0; |
| 1571 | } else if (thisNode->balance != 0) { |
| 1572 | return 1; |
| 1573 | } else { |
| 1574 | return 0; |
| 1575 | } |
| 1576 | } |
| 1577 | } else { |
| 1578 | /* |
| 1579 | * Insert right |
| 1580 | */ |
| 1581 | if (thisNode->right == NULL) { |
| 1582 | thisNode->right = newNode; |
| 1583 | if (thisNode->left == NULL) { |
| 1584 | thisNode->balance = 1; |
| 1585 | return 1; |
| 1586 | } else { |
| 1587 | thisNode->balance = 0; |
| 1588 | return 0; |
| 1589 | } |
| 1590 | } else { |
| 1591 | delta = nsafs_node_insert(newNode, &thisNode->right); |
| 1592 | if (delta == 0) { |
| 1593 | return 0; |
| 1594 | } |
| 1595 | thisNode->balance += delta; |
| 1596 | if (thisNode->balance == 2) { |
| 1597 | /* |
| 1598 | * rotate left |
| 1599 | */ |
| 1600 | if (thisNode->right->balance < 0) { |
| 1601 | #ifdef NSAFS_TREE_DEBUG |
| 1602 | printf("rotate right, line %d\n", __LINE__); |
| 1603 | #endif /* NSAFS_TREE_DEBUG */ |
| 1604 | *rootP = thisNode->right->left; |
| 1605 | if ((*rootP)->balance < 0) { |
| 1606 | thisNode->right->balance = -(*rootP)->balance; |
| 1607 | (*rootP)->balance = 0; |
| 1608 | thisNode->balance = 0; |
| 1609 | } else { |
| 1610 | thisNode->right->balance = 0; |
| 1611 | thisNode->balance = -(*rootP)->balance; |
| 1612 | (*rootP)->balance = 0; |
| 1613 | } |
| 1614 | thisNode->right->left = (*rootP)->right; |
| 1615 | (*rootP)->right = thisNode->right; |
| 1616 | thisNode->right = (*rootP)->left; |
| 1617 | (*rootP)->left = thisNode; |
| 1618 | } else { |
| 1619 | #ifdef NSAFS_TREE_DEBUG |
| 1620 | printf("rotate right, line %d\n", __LINE__); |
| 1621 | #endif /* NSAFS_TREE_DEBUG */ |
| 1622 | *rootP = thisNode->right; |
| 1623 | (*rootP)->balance = 0; |
| 1624 | thisNode->balance = 0; |
| 1625 | thisNode->right = (*rootP)->left; |
| 1626 | (*rootP)->left = thisNode; |
| 1627 | } |
| 1628 | return 0; |
| 1629 | } else if (thisNode->balance != 0) { |
| 1630 | return 1; |
| 1631 | } else { |
| 1632 | return 0; |
| 1633 | } |
| 1634 | } |
| 1635 | } |
| 1636 | } |
| 1637 | |
| 1638 | /* |
| 1639 | * Allocate storage for a new directory entry, copy in the name and |
| 1640 | * text, and insert the entry into the balanced binary tree. |
| 1641 | */ |
| 1642 | void |
| 1643 | nsafs_tree_insert(char *name, char *text, struct nsafs_tree **rootP) |
| 1644 | { |
| 1645 | int nameLen; |
| 1646 | int textLen; |
| 1647 | int allocLen; |
| 1648 | struct nsafs_tree *newNode; |
| 1649 | |
| 1650 | /* |
| 1651 | * allocate storage, initialize the fields, and copy in the data |
| 1652 | */ |
| 1653 | nameLen = strlen(name); |
| 1654 | textLen = strlen(text); |
| 1655 | allocLen = sizeof(struct nsafs_tree) + nameLen + textLen + 2; |
| 1656 | newNode = (struct nsafs_tree *)afs_osi_Alloc(allocLen); |
| 1657 | usr_assert(newNode != NULL); |
| 1658 | newNode->name = (char *)(newNode + 1); |
| 1659 | newNode->text = newNode->name + nameLen + 1; |
| 1660 | newNode->textLen = textLen; |
| 1661 | newNode->allocLen = allocLen; |
| 1662 | newNode->balance = 0; |
| 1663 | newNode->left = NULL; |
| 1664 | newNode->right = NULL; |
| 1665 | strcpy(newNode->name, name); |
| 1666 | strcpy(newNode->text, text); |
| 1667 | |
| 1668 | /* |
| 1669 | * If this is the first node, insert it here, otherwise call |
| 1670 | * nsafs_node_insert to insert the node into the balanced |
| 1671 | * binary tree. |
| 1672 | */ |
| 1673 | if (*rootP == NULL) { |
| 1674 | *rootP = newNode; |
| 1675 | } else { |
| 1676 | nsafs_node_insert(newNode, rootP); |
| 1677 | } |
| 1678 | #ifdef NSAFS_TREE_DEBUG |
| 1679 | nsafs_tree_check(*rootP); |
| 1680 | #endif /* NSAFS_TREE_DEBUG */ |
| 1681 | } |
| 1682 | |
| 1683 | /* |
| 1684 | * Transmit the contents of the tree |
| 1685 | */ |
| 1686 | int |
| 1687 | nsafs_tree_send(SYS_NETFD sd, struct nsafs_tree *root, char *outbuf, |
| 1688 | int *buflen, int bufsize) |
| 1689 | { |
| 1690 | int code; |
| 1691 | struct nsafs_tree *node; |
| 1692 | char *txtBuf; |
| 1693 | int txtLen; |
| 1694 | int len; |
| 1695 | |
| 1696 | /* |
| 1697 | * Recurse left, iterate right |
| 1698 | */ |
| 1699 | node = root; |
| 1700 | while (node != NULL) { |
| 1701 | if (node->left != NULL) { |
| 1702 | code = nsafs_tree_send(sd, node->left, outbuf, buflen, bufsize); |
| 1703 | if (code == IO_ERROR) { |
| 1704 | return IO_ERROR; |
| 1705 | } |
| 1706 | } |
| 1707 | txtLen = node->textLen; |
| 1708 | txtBuf = node->text; |
| 1709 | while (txtLen > 0) { |
| 1710 | if (*buflen == bufsize) { |
| 1711 | code = net_write(sd, outbuf, bufsize); |
| 1712 | if (code == IO_ERROR) { |
| 1713 | return IO_ERROR; |
| 1714 | } |
| 1715 | *buflen = 0; |
| 1716 | } |
| 1717 | len = MIN(txtLen, bufsize - *buflen); |
| 1718 | memcpy((void *)(outbuf + *buflen), (void *)txtBuf, len); |
| 1719 | *buflen += len; |
| 1720 | txtBuf += len; |
| 1721 | txtLen -= len; |
| 1722 | } |
| 1723 | node = node->right; |
| 1724 | } |
| 1725 | return 0; |
| 1726 | } |
| 1727 | |
| 1728 | /* |
| 1729 | * Free the binary tree and all data within |
| 1730 | */ |
| 1731 | void |
| 1732 | nsafs_tree_free(struct nsafs_tree *root) |
| 1733 | { |
| 1734 | struct nsafs_tree *node, *next; |
| 1735 | |
| 1736 | /* |
| 1737 | * Iterate left, recurse right |
| 1738 | */ |
| 1739 | node = root; |
| 1740 | while (node != NULL) { |
| 1741 | if (node->right != NULL) { |
| 1742 | nsafs_tree_free(node->right); |
| 1743 | } |
| 1744 | next = node->left; |
| 1745 | afs_osi_Free(node, |
| 1746 | sizeof(struct nsafs_tree) + strlen(node->name) + |
| 1747 | strlen(node->text) + 2); |
| 1748 | node = next; |
| 1749 | } |
| 1750 | } |
| 1751 | |
| 1752 | /* |
| 1753 | * Send the contents of an AFS directory, Simple directory format |
| 1754 | */ |
| 1755 | int |
| 1756 | nsafs_send_directory(char *path, struct stat *stp, pblock * pb, Session * sn, |
| 1757 | Request * rq) |
| 1758 | { |
| 1759 | char *dirbuf; |
| 1760 | int buflen; |
| 1761 | char *filename; |
| 1762 | usr_DIR *dirp; |
| 1763 | struct usr_dirent *enp; |
| 1764 | int contentLength; |
| 1765 | int rc; |
| 1766 | int code; |
| 1767 | char *htmlHdr = |
| 1768 | "<HTML>\r\n<BODY>\r\n" "<TITLE>Index of %s</TITLE>\r\n" |
| 1769 | "<h1>Index of %s</h1>\r\n" "<PRE><HR>\r\n"; |
| 1770 | char *htmlTrl = "</PRE></BODY></HTML>\r\n"; |
| 1771 | struct nsafs_tree *root; |
| 1772 | |
| 1773 | /* |
| 1774 | * Set the content type to "text/html" |
| 1775 | */ |
| 1776 | param_free(pblock_remove("content-type", rq->srvhdrs)); |
| 1777 | pblock_nvinsert("content-type", "text/html", rq->srvhdrs); |
| 1778 | |
| 1779 | /* |
| 1780 | * Build a binary tree of directory entries, and calculate the |
| 1781 | * length of our response message |
| 1782 | */ |
| 1783 | dirp = uafs_opendir(path); |
| 1784 | if (dirp == NULL) { |
| 1785 | code = errno; |
| 1786 | return nsafs_error_check(code, NULL, pb, sn, rq); |
| 1787 | } |
| 1788 | root = NULL; |
| 1789 | contentLength = 0; |
| 1790 | dirbuf = afs_osi_Alloc(NSAFS_BUFFER_SIZE); |
| 1791 | while ((enp = uafs_readdir(dirp)) != NULL) { |
| 1792 | if (strcmp(enp->d_name, ".") == 0) { |
| 1793 | continue; |
| 1794 | } else if (strcmp(enp->d_name, "..") == 0) { |
| 1795 | filename = "Parent Directory"; |
| 1796 | } else { |
| 1797 | filename = enp->d_name; |
| 1798 | } |
| 1799 | sprintf(dirbuf, "<A HREF=\"%s%s\" NAME=\"%s\"> %s</A>\r\n", path, |
| 1800 | enp->d_name, filename, filename); |
| 1801 | contentLength += strlen(dirbuf); |
| 1802 | nsafs_tree_insert(enp->d_name, dirbuf, &root); |
| 1803 | } |
| 1804 | if (errno != 0) { |
| 1805 | code = errno; |
| 1806 | uafs_closedir(dirp); |
| 1807 | afs_osi_Free(dirbuf, NSAFS_BUFFER_SIZE); |
| 1808 | nsafs_tree_free(root); |
| 1809 | return nsafs_error_check(code, NULL, pb, sn, rq); |
| 1810 | } |
| 1811 | rc = uafs_closedir(dirp); |
| 1812 | if (rc < 0) { |
| 1813 | code = errno; |
| 1814 | afs_osi_Free(dirbuf, NSAFS_BUFFER_SIZE); |
| 1815 | nsafs_tree_free(root); |
| 1816 | return nsafs_error_check(code, NULL, pb, sn, rq); |
| 1817 | } |
| 1818 | |
| 1819 | /* |
| 1820 | * Calculate the length of the HTML headers and trailers, |
| 1821 | * set the content-length field in the reply header, and |
| 1822 | * start the reply message |
| 1823 | */ |
| 1824 | sprintf(dirbuf, htmlHdr, path, path); |
| 1825 | contentLength += strlen(dirbuf) + strlen(htmlTrl); |
| 1826 | stp->st_size = contentLength; |
| 1827 | code = nsafs_set_finfo(sn, rq, stp); |
| 1828 | if (code != REQ_PROCEED) { |
| 1829 | nsafs_tree_free(root); |
| 1830 | protocol_status(sn, rq, PROTOCOL_NOT_MODIFIED, NULL); |
| 1831 | return code; |
| 1832 | } |
| 1833 | protocol_status(sn, rq, PROTOCOL_OK, NULL); |
| 1834 | code = protocol_start_response(sn, rq); |
| 1835 | if (code != REQ_PROCEED) { |
| 1836 | afs_osi_Free(dirbuf, NSAFS_BUFFER_SIZE); |
| 1837 | nsafs_tree_free(root); |
| 1838 | return REQ_PROCEED; |
| 1839 | } |
| 1840 | |
| 1841 | /* |
| 1842 | * Send the HTML header, file data and HTML trailer |
| 1843 | */ |
| 1844 | if (net_write(sn->csd, dirbuf, strlen(dirbuf)) == IO_ERROR) { |
| 1845 | afs_osi_Free(dirbuf, NSAFS_BUFFER_SIZE); |
| 1846 | nsafs_tree_free(root); |
| 1847 | log_error(LOG_INFORM, "nsafs", sn, rq, "send_directory IO_ERROR"); |
| 1848 | return REQ_EXIT; |
| 1849 | } |
| 1850 | buflen = 0; |
| 1851 | code = nsafs_tree_send(sn->csd, root, dirbuf, &buflen, NSAFS_BUFFER_SIZE); |
| 1852 | if (code == IO_ERROR) { |
| 1853 | afs_osi_Free(dirbuf, NSAFS_BUFFER_SIZE); |
| 1854 | nsafs_tree_free(root); |
| 1855 | log_error(LOG_INFORM, "nsafs", sn, rq, "send_directory IO_ERROR"); |
| 1856 | return REQ_EXIT; |
| 1857 | } |
| 1858 | nsafs_tree_free(root); |
| 1859 | if (buflen != 0) { |
| 1860 | code = net_write(sn->csd, dirbuf, buflen); |
| 1861 | if (code == IO_ERROR) { |
| 1862 | afs_osi_Free(dirbuf, NSAFS_BUFFER_SIZE); |
| 1863 | log_error(LOG_INFORM, "nsafs", sn, rq, "send_directory IO_ERROR"); |
| 1864 | return REQ_EXIT; |
| 1865 | } |
| 1866 | } |
| 1867 | afs_osi_Free(dirbuf, NSAFS_BUFFER_SIZE); |
| 1868 | if (net_write(sn->csd, htmlTrl, strlen(htmlTrl)) == IO_ERROR) { |
| 1869 | return REQ_EXIT; |
| 1870 | } |
| 1871 | |
| 1872 | return REQ_PROCEED; |
| 1873 | } |
| 1874 | |
| 1875 | /* |
| 1876 | * Send the contents of an AFS file |
| 1877 | */ |
| 1878 | int |
| 1879 | nsafs_send_file(char *path, struct stat *stp, pblock * pb, Session * sn, |
| 1880 | Request * rq) |
| 1881 | { |
| 1882 | char *filebuf; |
| 1883 | int i; |
| 1884 | int rc; |
| 1885 | int fd; |
| 1886 | int code; |
| 1887 | |
| 1888 | /* |
| 1889 | * Make sure we can open the file before we send the response header |
| 1890 | */ |
| 1891 | fd = uafs_open(path, O_RDONLY, 0); |
| 1892 | if (fd < 0) { |
| 1893 | code = errno; |
| 1894 | return nsafs_error_check(code, NULL, pb, sn, rq); |
| 1895 | } |
| 1896 | |
| 1897 | /* |
| 1898 | * Add a content-length field to the response header and |
| 1899 | * begin the response message. We have already checked the |
| 1900 | * preconditions, so a return code other than REQ_PROCEED |
| 1901 | * means that this is a HEAD command. |
| 1902 | */ |
| 1903 | code = nsafs_set_finfo(sn, rq, stp); |
| 1904 | if (code != REQ_PROCEED) { |
| 1905 | return code; |
| 1906 | } |
| 1907 | protocol_status(sn, rq, PROTOCOL_OK, NULL); |
| 1908 | code = protocol_start_response(sn, rq); |
| 1909 | if (code != REQ_PROCEED) { |
| 1910 | return REQ_PROCEED; |
| 1911 | } |
| 1912 | |
| 1913 | /* |
| 1914 | * Send the file contents |
| 1915 | */ |
| 1916 | filebuf = afs_osi_Alloc(NSAFS_BUFFER_SIZE); |
| 1917 | while ((rc = uafs_read(fd, filebuf, NSAFS_BUFFER_SIZE)) > 0) { |
| 1918 | if (net_write(sn->csd, filebuf, rc) == IO_ERROR) { |
| 1919 | afs_osi_Free(filebuf, NSAFS_BUFFER_SIZE); |
| 1920 | uafs_close(fd); |
| 1921 | log_error(LOG_INFORM, "nsafs", sn, rq, "send_file IO_ERROR"); |
| 1922 | return REQ_EXIT; |
| 1923 | } |
| 1924 | } |
| 1925 | if (rc < 0) { |
| 1926 | code = errno; |
| 1927 | uafs_close(fd); |
| 1928 | afs_osi_Free(filebuf, NSAFS_BUFFER_SIZE); |
| 1929 | log_error(LOG_FAILURE, "nsafs", sn, rq, "uafs_read, err=%d", code); |
| 1930 | return REQ_EXIT; |
| 1931 | } |
| 1932 | afs_osi_Free(filebuf, NSAFS_BUFFER_SIZE); |
| 1933 | rc = uafs_close(fd); |
| 1934 | if (rc < 0) { |
| 1935 | code = errno; |
| 1936 | log_error(LOG_FAILURE, "nsafs", sn, rq, "uafs_close, err=%d", code); |
| 1937 | } |
| 1938 | return REQ_PROCEED; |
| 1939 | } |
| 1940 | |
| 1941 | /* |
| 1942 | * Service function for AFS files and directories |
| 1943 | */ |
| 1944 | NSAPI_PUBLIC int |
| 1945 | nsafs_send(pblock * pb, Session * sn, Request * rq) |
| 1946 | { |
| 1947 | char *path; |
| 1948 | char *dirPath; |
| 1949 | char *viceid; |
| 1950 | char *group0; |
| 1951 | char *group1; |
| 1952 | char *rangeHdr; |
| 1953 | struct stat st; |
| 1954 | int rc; |
| 1955 | int len; |
| 1956 | int code; |
| 1957 | |
| 1958 | if (nsafs_init_done == 0) { |
| 1959 | nsafs_init_once(); |
| 1960 | } |
| 1961 | |
| 1962 | /* |
| 1963 | * Only service paths that are in AFS |
| 1964 | */ |
| 1965 | path = pblock_findval("path", rq->vars); |
| 1966 | if (path == NULL) { |
| 1967 | return REQ_NOACTION; |
| 1968 | } |
| 1969 | if (uafs_afsPathName(path) == NULL) { |
| 1970 | return REQ_NOACTION; |
| 1971 | } |
| 1972 | |
| 1973 | /* |
| 1974 | * We do not support content-range headers |
| 1975 | */ |
| 1976 | request_header("content-range", &rangeHdr, sn, rq); |
| 1977 | if (rangeHdr != NULL) { |
| 1978 | protocol_status(sn, rq, PROTOCOL_NOT_IMPLEMENTED, NULL); |
| 1979 | log_error(LOG_INFORM, "nsafs", sn, rq, |
| 1980 | "content-range is not implemented"); |
| 1981 | } |
| 1982 | |
| 1983 | /* |
| 1984 | * Check for group numbers in the request vars, otherwise use the |
| 1985 | * defaults |
| 1986 | */ |
| 1987 | viceid = pblock_findval("nsafs_viceid", rq->vars); |
| 1988 | group0 = pblock_findval("nsafs_group0", rq->vars); |
| 1989 | group1 = pblock_findval("nsafs_group1", rq->vars); |
| 1990 | nsafs_set_id_from_strings(viceid, group0, group1); |
| 1991 | |
| 1992 | /* |
| 1993 | * Get the file attributes |
| 1994 | */ |
| 1995 | rc = uafs_stat(path, &st); |
| 1996 | if (rc < 0) { |
| 1997 | code = errno; |
| 1998 | return nsafs_error_check(code, NULL, pb, sn, rq); |
| 1999 | } |
| 2000 | |
| 2001 | /* |
| 2002 | * Check the request preconditions |
| 2003 | */ |
| 2004 | code = nsafs_check_preconditions(&st, pb, sn, rq); |
| 2005 | if (code != REQ_PROCEED) { |
| 2006 | return code; |
| 2007 | } |
| 2008 | |
| 2009 | /* |
| 2010 | * Send the contents of files, and a formatted index of directories |
| 2011 | */ |
| 2012 | if ((st.st_mode & S_IFMT) == S_IFDIR) { |
| 2013 | len = strlen(path); |
| 2014 | dirPath = afs_osi_Alloc(len + 2); |
| 2015 | strcpy(dirPath, path); |
| 2016 | if (dirPath[len - 1] != '/') { |
| 2017 | dirPath[len] = '/'; |
| 2018 | dirPath[len + 1] = '\0'; |
| 2019 | } |
| 2020 | if (util_uri_is_evil(dirPath)) { |
| 2021 | util_uri_parse(dirPath); |
| 2022 | } |
| 2023 | code = nsafs_send_directory(dirPath, &st, pb, sn, rq); |
| 2024 | afs_osi_Free(dirPath, len + 2); |
| 2025 | } else { |
| 2026 | code = nsafs_send_file(path, &st, pb, sn, rq); |
| 2027 | } |
| 2028 | return code; |
| 2029 | } |
| 2030 | |
| 2031 | /* |
| 2032 | * Service function to create new AFS files |
| 2033 | */ |
| 2034 | NSAPI_PUBLIC int |
| 2035 | nsafs_put(pblock * pb, Session * sn, Request * rq) |
| 2036 | { |
| 2037 | char *path; |
| 2038 | char *viceid; |
| 2039 | char *group0; |
| 2040 | char *group1; |
| 2041 | char *rangeHdr; |
| 2042 | char *lengthHdr; |
| 2043 | char *filebuf; |
| 2044 | struct stat st; |
| 2045 | int i; |
| 2046 | int rc; |
| 2047 | int fd; |
| 2048 | int eof; |
| 2049 | int bytesRead; |
| 2050 | int bytesToRead; |
| 2051 | int code; |
| 2052 | int contentLength; |
| 2053 | int rspStatus; |
| 2054 | |
| 2055 | if (nsafs_init_done == 0) { |
| 2056 | nsafs_init_once(); |
| 2057 | } |
| 2058 | |
| 2059 | /* |
| 2060 | * Only service paths that are in AFS |
| 2061 | */ |
| 2062 | path = pblock_findval("path", rq->vars); |
| 2063 | if (path == NULL) { |
| 2064 | return REQ_NOACTION; |
| 2065 | } |
| 2066 | if (uafs_afsPathName(path) == NULL) { |
| 2067 | return REQ_NOACTION; |
| 2068 | } |
| 2069 | |
| 2070 | /* |
| 2071 | * We do not support content-range headers |
| 2072 | */ |
| 2073 | request_header("content-range", &rangeHdr, sn, rq); |
| 2074 | if (rangeHdr != NULL) { |
| 2075 | protocol_status(sn, rq, PROTOCOL_NOT_IMPLEMENTED, NULL); |
| 2076 | log_error(LOG_INFORM, "nsafs", sn, rq, |
| 2077 | "content-range is not implemented"); |
| 2078 | } |
| 2079 | |
| 2080 | /* |
| 2081 | * Check for group numbers in the request vars, otherwise use the |
| 2082 | * defaults |
| 2083 | */ |
| 2084 | viceid = pblock_findval("nsafs_viceid", rq->vars); |
| 2085 | group0 = pblock_findval("nsafs_group0", rq->vars); |
| 2086 | group1 = pblock_findval("nsafs_group1", rq->vars); |
| 2087 | nsafs_set_id_from_strings(viceid, group0, group1); |
| 2088 | |
| 2089 | /* |
| 2090 | * Check for a content length header |
| 2091 | */ |
| 2092 | request_header("content-length", &lengthHdr, sn, rq); |
| 2093 | if (lengthHdr != NULL) { |
| 2094 | contentLength = atoi(lengthHdr); |
| 2095 | } else { |
| 2096 | contentLength = -1; |
| 2097 | } |
| 2098 | |
| 2099 | /* |
| 2100 | * Get the file attributes |
| 2101 | */ |
| 2102 | rc = uafs_stat(path, &st); |
| 2103 | if (rc < 0) { |
| 2104 | code = errno; |
| 2105 | if (code == ENOENT) { |
| 2106 | rspStatus = PROTOCOL_CREATED; |
| 2107 | } else { |
| 2108 | return nsafs_error_check(code, NULL, pb, sn, rq); |
| 2109 | } |
| 2110 | } else if ((st.st_mode & S_IFMT) == S_IFDIR) { |
| 2111 | return nsafs_error_check(EISDIR, NULL, pb, sn, rq); |
| 2112 | } else { |
| 2113 | rspStatus = PROTOCOL_OK; |
| 2114 | } |
| 2115 | |
| 2116 | fd = uafs_open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
| 2117 | if (fd < 0) { |
| 2118 | code = errno; |
| 2119 | return nsafs_error_check(code, NULL, pb, sn, rq); |
| 2120 | } |
| 2121 | |
| 2122 | /* |
| 2123 | * Get the file contents |
| 2124 | */ |
| 2125 | filebuf = afs_osi_Alloc(NSAFS_BUFFER_SIZE); |
| 2126 | eof = 0; |
| 2127 | while (!eof) { |
| 2128 | if (contentLength < 0) { |
| 2129 | bytesToRead = NSAFS_BUFFER_SIZE; |
| 2130 | } else { |
| 2131 | bytesToRead = MIN(contentLength, NSAFS_BUFFER_SIZE); |
| 2132 | if (bytesToRead == 0) { |
| 2133 | eof = 1; |
| 2134 | } |
| 2135 | } |
| 2136 | for (bytesRead = 0; !eof && bytesRead < bytesToRead; bytesRead++) { |
| 2137 | rc = netbuf_getc(sn->inbuf); |
| 2138 | if (rc == IO_EOF) { |
| 2139 | eof = 1; |
| 2140 | } else if (rc == IO_ERROR) { |
| 2141 | code = errno; |
| 2142 | afs_osi_Free(filebuf, NSAFS_BUFFER_SIZE); |
| 2143 | uafs_close(fd); |
| 2144 | return nsafs_error_check(EIO, NULL, pb, sn, rq); |
| 2145 | } else { |
| 2146 | filebuf[bytesRead] = rc; |
| 2147 | } |
| 2148 | } |
| 2149 | if (bytesRead > 0) { |
| 2150 | if (contentLength > 0) { |
| 2151 | contentLength -= bytesRead; |
| 2152 | } |
| 2153 | rc = uafs_write(fd, filebuf, bytesRead); |
| 2154 | if (rc < 0) { |
| 2155 | code = errno; |
| 2156 | afs_osi_Free(filebuf, NSAFS_BUFFER_SIZE); |
| 2157 | uafs_close(fd); |
| 2158 | return nsafs_error_check(code, NULL, pb, sn, rq); |
| 2159 | } |
| 2160 | } |
| 2161 | } |
| 2162 | afs_osi_Free(filebuf, NSAFS_BUFFER_SIZE); |
| 2163 | rc = uafs_close(fd); |
| 2164 | if (rc < 0) { |
| 2165 | code = errno; |
| 2166 | return nsafs_error_check(code, NULL, pb, sn, rq); |
| 2167 | } |
| 2168 | if (contentLength > 0) { |
| 2169 | log_error(LOG_FAILURE, "nsafs", sn, rq, "received partial contents"); |
| 2170 | return REQ_EXIT; |
| 2171 | } |
| 2172 | |
| 2173 | pblock_nninsert("Content-Length", 0, rq->srvhdrs); |
| 2174 | protocol_status(sn, rq, rspStatus, NULL); |
| 2175 | code = protocol_start_response(sn, rq); |
| 2176 | return code; |
| 2177 | } |
| 2178 | |
| 2179 | /* |
| 2180 | * Service function to delete AFS files |
| 2181 | */ |
| 2182 | NSAPI_PUBLIC int |
| 2183 | nsafs_delete(pblock * pb, Session * sn, Request * rq) |
| 2184 | { |
| 2185 | char *path; |
| 2186 | char *viceid; |
| 2187 | char *group0; |
| 2188 | char *group1; |
| 2189 | struct stat st; |
| 2190 | int rc; |
| 2191 | int code; |
| 2192 | |
| 2193 | if (nsafs_init_done == 0) { |
| 2194 | nsafs_init_once(); |
| 2195 | } |
| 2196 | |
| 2197 | /* |
| 2198 | * Only service paths that are in AFS |
| 2199 | */ |
| 2200 | path = pblock_findval("path", rq->vars); |
| 2201 | if (path == NULL) { |
| 2202 | return REQ_NOACTION; |
| 2203 | } |
| 2204 | if (uafs_afsPathName(path) == NULL) { |
| 2205 | return REQ_NOACTION; |
| 2206 | } |
| 2207 | |
| 2208 | /* |
| 2209 | * Check for group numbers in the request vars, otherwise use the |
| 2210 | * defaults |
| 2211 | */ |
| 2212 | viceid = pblock_findval("nsafs_viceid", rq->vars); |
| 2213 | group0 = pblock_findval("nsafs_group0", rq->vars); |
| 2214 | group1 = pblock_findval("nsafs_group1", rq->vars); |
| 2215 | nsafs_set_id_from_strings(viceid, group0, group1); |
| 2216 | |
| 2217 | /* |
| 2218 | * Get the file attributes |
| 2219 | */ |
| 2220 | rc = uafs_lstat(path, &st); |
| 2221 | if (rc < 0) { |
| 2222 | code = errno; |
| 2223 | return nsafs_error_check(code, NULL, pb, sn, rq); |
| 2224 | } else if ((st.st_mode & S_IFMT) == S_IFDIR) { |
| 2225 | log_error(LOG_INFORM, "nsafs", sn, rq, "Cannot DELETE directories"); |
| 2226 | protocol_status(sn, rq, PROTOCOL_METHOD_NOT_ALLOWED, NULL); |
| 2227 | pblock_nvinsert("Allow", NSAFS_DIR_ALLOW, rq->srvhdrs); |
| 2228 | return REQ_ABORTED; |
| 2229 | } |
| 2230 | |
| 2231 | rc = uafs_unlink(path); |
| 2232 | if (rc < 0) { |
| 2233 | code = errno; |
| 2234 | return nsafs_error_check(code, NULL, pb, sn, rq); |
| 2235 | } |
| 2236 | |
| 2237 | pblock_nninsert("Content-Length", 0, rq->srvhdrs); |
| 2238 | protocol_status(sn, rq, PROTOCOL_OK, NULL); |
| 2239 | code = protocol_start_response(sn, rq); |
| 2240 | return code; |
| 2241 | } |
| 2242 | |
| 2243 | /* |
| 2244 | * Service function to create AFS directories |
| 2245 | */ |
| 2246 | NSAPI_PUBLIC int |
| 2247 | nsafs_mkdir(pblock * pb, Session * sn, Request * rq) |
| 2248 | { |
| 2249 | char *path; |
| 2250 | char *viceid; |
| 2251 | char *group0; |
| 2252 | char *group1; |
| 2253 | struct stat st; |
| 2254 | int rc; |
| 2255 | int code; |
| 2256 | |
| 2257 | if (nsafs_init_done == 0) { |
| 2258 | nsafs_init_once(); |
| 2259 | } |
| 2260 | |
| 2261 | /* |
| 2262 | * Only service paths that are in AFS |
| 2263 | */ |
| 2264 | path = pblock_findval("path", rq->vars); |
| 2265 | if (path == NULL) { |
| 2266 | return REQ_NOACTION; |
| 2267 | } |
| 2268 | if (uafs_afsPathName(path) == NULL) { |
| 2269 | return REQ_NOACTION; |
| 2270 | } |
| 2271 | |
| 2272 | /* |
| 2273 | * Check for group numbers in the request vars, otherwise use the |
| 2274 | * defaults |
| 2275 | */ |
| 2276 | viceid = pblock_findval("nsafs_viceid", rq->vars); |
| 2277 | group0 = pblock_findval("nsafs_group0", rq->vars); |
| 2278 | group1 = pblock_findval("nsafs_group1", rq->vars); |
| 2279 | nsafs_set_id_from_strings(viceid, group0, group1); |
| 2280 | |
| 2281 | /* |
| 2282 | * Create the directory |
| 2283 | */ |
| 2284 | rc = uafs_mkdir(path, 0755); |
| 2285 | if (rc < 0) { |
| 2286 | code = errno; |
| 2287 | return nsafs_error_check(code, NULL, pb, sn, rq); |
| 2288 | } |
| 2289 | |
| 2290 | pblock_nninsert("Content-Length", 0, rq->srvhdrs); |
| 2291 | protocol_status(sn, rq, PROTOCOL_OK, NULL); |
| 2292 | code = protocol_start_response(sn, rq); |
| 2293 | return code; |
| 2294 | } |
| 2295 | |
| 2296 | /* |
| 2297 | * Service function to delete AFS directories |
| 2298 | */ |
| 2299 | NSAPI_PUBLIC int |
| 2300 | nsafs_rmdir(pblock * pb, Session * sn, Request * rq) |
| 2301 | { |
| 2302 | char *path; |
| 2303 | char *viceid; |
| 2304 | char *group0; |
| 2305 | char *group1; |
| 2306 | struct stat st; |
| 2307 | int rc; |
| 2308 | int code; |
| 2309 | |
| 2310 | if (nsafs_init_done == 0) { |
| 2311 | nsafs_init_once(); |
| 2312 | } |
| 2313 | |
| 2314 | /* |
| 2315 | * Only service paths that are in AFS |
| 2316 | */ |
| 2317 | path = pblock_findval("path", rq->vars); |
| 2318 | if (path == NULL) { |
| 2319 | return REQ_NOACTION; |
| 2320 | } |
| 2321 | if (uafs_afsPathName(path) == NULL) { |
| 2322 | return REQ_NOACTION; |
| 2323 | } |
| 2324 | |
| 2325 | /* |
| 2326 | * Check for group numbers in the request vars, otherwise use the |
| 2327 | * defaults |
| 2328 | */ |
| 2329 | viceid = pblock_findval("nsafs_viceid", rq->vars); |
| 2330 | group0 = pblock_findval("nsafs_group0", rq->vars); |
| 2331 | group1 = pblock_findval("nsafs_group1", rq->vars); |
| 2332 | nsafs_set_id_from_strings(viceid, group0, group1); |
| 2333 | |
| 2334 | /* |
| 2335 | * Get the file attributes, rmdir only work on directories. |
| 2336 | */ |
| 2337 | rc = uafs_lstat(path, &st); |
| 2338 | if (rc < 0) { |
| 2339 | code = errno; |
| 2340 | return nsafs_error_check(code, NULL, pb, sn, rq); |
| 2341 | } |
| 2342 | |
| 2343 | /* |
| 2344 | * Call unlink to delete symbolic links to directories, and rmdir |
| 2345 | * to to delete directories. |
| 2346 | */ |
| 2347 | if ((st.st_mode & S_IFMT) == S_IFDIR) { |
| 2348 | rc = uafs_rmdir(path); |
| 2349 | } else if ((st.st_mode & S_IFMT) == S_IFLNK) { |
| 2350 | log_error(LOG_INFORM, "nsafs", sn, rq, "Cannot RMDIR links"); |
| 2351 | protocol_status(sn, rq, PROTOCOL_METHOD_NOT_ALLOWED, NULL); |
| 2352 | pblock_nvinsert("Allow", NSAFS_LINK_ALLOW, rq->srvhdrs); |
| 2353 | return REQ_ABORTED; |
| 2354 | } else if ((st.st_mode & S_IFMT) != S_IFDIR) { |
| 2355 | log_error(LOG_INFORM, "nsafs", sn, rq, "Cannot RMDIR files"); |
| 2356 | protocol_status(sn, rq, PROTOCOL_METHOD_NOT_ALLOWED, NULL); |
| 2357 | pblock_nvinsert("Allow", NSAFS_FILE_ALLOW, rq->srvhdrs); |
| 2358 | return REQ_ABORTED; |
| 2359 | } |
| 2360 | if (rc < 0) { |
| 2361 | code = errno; |
| 2362 | return nsafs_error_check(code, NULL, pb, sn, rq); |
| 2363 | } |
| 2364 | |
| 2365 | pblock_nninsert("Content-Length", 0, rq->srvhdrs); |
| 2366 | protocol_status(sn, rq, PROTOCOL_OK, NULL); |
| 2367 | code = protocol_start_response(sn, rq); |
| 2368 | return code; |
| 2369 | } |
| 2370 | |
| 2371 | /* |
| 2372 | * Service function to rename AFS files and directories |
| 2373 | */ |
| 2374 | NSAPI_PUBLIC int |
| 2375 | nsafs_move(pblock * pb, Session * sn, Request * rq) |
| 2376 | { |
| 2377 | char *path; |
| 2378 | char *newPath; |
| 2379 | char *viceid; |
| 2380 | char *group0; |
| 2381 | char *group1; |
| 2382 | struct stat st; |
| 2383 | int rc; |
| 2384 | int code; |
| 2385 | |
| 2386 | if (nsafs_init_done == 0) { |
| 2387 | nsafs_init_once(); |
| 2388 | } |
| 2389 | |
| 2390 | /* |
| 2391 | * Only service paths that are in AFS |
| 2392 | */ |
| 2393 | path = pblock_findval("path", rq->vars); |
| 2394 | if (path == NULL) { |
| 2395 | return REQ_NOACTION; |
| 2396 | } |
| 2397 | if (uafs_afsPathName(path) == NULL) { |
| 2398 | return REQ_NOACTION; |
| 2399 | } |
| 2400 | newPath = pblock_findval("newpath", rq->vars); |
| 2401 | if (newPath == NULL) { |
| 2402 | return REQ_NOACTION; |
| 2403 | } |
| 2404 | if (uafs_afsPathName(newPath) == NULL) { |
| 2405 | return REQ_NOACTION; |
| 2406 | } |
| 2407 | |
| 2408 | /* |
| 2409 | * Check for group numbers in the request vars, otherwise use the |
| 2410 | * defaults |
| 2411 | */ |
| 2412 | viceid = pblock_findval("nsafs_viceid", rq->vars); |
| 2413 | group0 = pblock_findval("nsafs_group0", rq->vars); |
| 2414 | group1 = pblock_findval("nsafs_group1", rq->vars); |
| 2415 | nsafs_set_id_from_strings(viceid, group0, group1); |
| 2416 | |
| 2417 | /* |
| 2418 | * Rename the object |
| 2419 | */ |
| 2420 | rc = uafs_rename(path, newPath); |
| 2421 | if (rc < 0) { |
| 2422 | code = errno; |
| 2423 | return nsafs_error_check(code, NULL, pb, sn, rq); |
| 2424 | } |
| 2425 | |
| 2426 | pblock_nninsert("Content-Length", 0, rq->srvhdrs); |
| 2427 | protocol_status(sn, rq, PROTOCOL_OK, NULL); |
| 2428 | code = protocol_start_response(sn, rq); |
| 2429 | return code; |
| 2430 | } |
| 2431 | |
| 2432 | /* |
| 2433 | * Send the index of an AFS directory |
| 2434 | */ |
| 2435 | int |
| 2436 | nsafs_index(pblock * pb, Session * sn, Request * rq) |
| 2437 | { |
| 2438 | char *path; |
| 2439 | char *viceid; |
| 2440 | char *group0; |
| 2441 | char *group1; |
| 2442 | char *dirbuf; |
| 2443 | char *tmpPath; |
| 2444 | int buflen; |
| 2445 | usr_DIR *dirp; |
| 2446 | struct usr_dirent *enp; |
| 2447 | int contentLength; |
| 2448 | int rc; |
| 2449 | int code; |
| 2450 | struct stat st; |
| 2451 | struct nsafs_tree *root; |
| 2452 | |
| 2453 | if (nsafs_init_done == 0) { |
| 2454 | nsafs_init_once(); |
| 2455 | } |
| 2456 | |
| 2457 | /* |
| 2458 | * Only service paths that are in AFS |
| 2459 | */ |
| 2460 | path = pblock_findval("path", rq->vars); |
| 2461 | if (path == NULL) { |
| 2462 | return REQ_NOACTION; |
| 2463 | } |
| 2464 | if (uafs_afsPathName(path) == NULL) { |
| 2465 | return REQ_NOACTION; |
| 2466 | } |
| 2467 | |
| 2468 | /* |
| 2469 | * Check for group numbers in the request vars, otherwise use the |
| 2470 | * defaults |
| 2471 | */ |
| 2472 | viceid = pblock_findval("nsafs_viceid", rq->vars); |
| 2473 | group0 = pblock_findval("nsafs_group0", rq->vars); |
| 2474 | group1 = pblock_findval("nsafs_group1", rq->vars); |
| 2475 | nsafs_set_id_from_strings(viceid, group0, group1); |
| 2476 | |
| 2477 | /* |
| 2478 | * Get the file attributes, index does not work on symbolic links. |
| 2479 | */ |
| 2480 | rc = uafs_lstat(path, &st); |
| 2481 | if (rc < 0) { |
| 2482 | code = errno; |
| 2483 | return nsafs_error_check(code, NULL, pb, sn, rq); |
| 2484 | } |
| 2485 | if ((st.st_mode & S_IFMT) == S_IFLNK) { |
| 2486 | log_error(LOG_INFORM, "nsafs", sn, rq, "Cannot INDEX links"); |
| 2487 | protocol_status(sn, rq, PROTOCOL_METHOD_NOT_ALLOWED, NULL); |
| 2488 | pblock_nvinsert("Allow", NSAFS_LINK_ALLOW, rq->srvhdrs); |
| 2489 | return REQ_ABORTED; |
| 2490 | } else if ((st.st_mode & S_IFMT) != S_IFDIR) { |
| 2491 | log_error(LOG_INFORM, "nsafs", sn, rq, "Cannot INDEX files"); |
| 2492 | protocol_status(sn, rq, PROTOCOL_METHOD_NOT_ALLOWED, NULL); |
| 2493 | pblock_nvinsert("Allow", NSAFS_FILE_ALLOW, rq->srvhdrs); |
| 2494 | return REQ_ABORTED; |
| 2495 | } |
| 2496 | |
| 2497 | /* |
| 2498 | * Set the content type to "text/html" |
| 2499 | */ |
| 2500 | param_free(pblock_remove("content-type", rq->srvhdrs)); |
| 2501 | pblock_nvinsert("content-type", "text/html", rq->srvhdrs); |
| 2502 | |
| 2503 | /* |
| 2504 | * Build a binary tree of directory entries, and calculate the |
| 2505 | * length of our response message |
| 2506 | */ |
| 2507 | dirp = uafs_opendir(path); |
| 2508 | if (dirp == NULL) { |
| 2509 | code = errno; |
| 2510 | return nsafs_error_check(code, NULL, pb, sn, rq); |
| 2511 | } |
| 2512 | dirbuf = afs_osi_Alloc(NSAFS_BUFFER_SIZE); |
| 2513 | tmpPath = afs_osi_Alloc(NSAFS_MAX_PATH); |
| 2514 | root = NULL; |
| 2515 | contentLength = 0; |
| 2516 | while ((enp = uafs_readdir(dirp)) != NULL) { |
| 2517 | sprintf(tmpPath, "%s/%s", path, enp->d_name); |
| 2518 | rc = uafs_lstat(tmpPath, &st); |
| 2519 | if (rc < 0) { |
| 2520 | continue; |
| 2521 | } else if ((st.st_mode & S_IFMT) == S_IFDIR) { |
| 2522 | sprintf(dirbuf, "%s directory %u %u\r\n", enp->d_name, st.st_size, |
| 2523 | st.st_mtime); |
| 2524 | } else if ((st.st_mode & S_IFMT) == S_IFLNK) { |
| 2525 | sprintf(dirbuf, "%s link %u %u\r\n", enp->d_name, st.st_size, |
| 2526 | st.st_mtime); |
| 2527 | } else { |
| 2528 | sprintf(dirbuf, "%s unknown %u %u\r\n", enp->d_name, st.st_size, |
| 2529 | st.st_mtime); |
| 2530 | } |
| 2531 | contentLength += strlen(dirbuf); |
| 2532 | nsafs_tree_insert(enp->d_name, dirbuf, &root); |
| 2533 | } |
| 2534 | if (errno != 0) { |
| 2535 | code = errno; |
| 2536 | uafs_closedir(dirp); |
| 2537 | afs_osi_Free(dirbuf, NSAFS_BUFFER_SIZE); |
| 2538 | afs_osi_Free(tmpPath, NSAFS_MAX_PATH); |
| 2539 | nsafs_tree_free(root); |
| 2540 | return nsafs_error_check(code, NULL, pb, sn, rq); |
| 2541 | } |
| 2542 | afs_osi_Free(tmpPath, NSAFS_MAX_PATH); |
| 2543 | rc = uafs_closedir(dirp); |
| 2544 | if (rc < 0) { |
| 2545 | code = errno; |
| 2546 | afs_osi_Free(dirbuf, NSAFS_BUFFER_SIZE); |
| 2547 | nsafs_tree_free(root); |
| 2548 | return nsafs_error_check(code, NULL, pb, sn, rq); |
| 2549 | } |
| 2550 | |
| 2551 | /* |
| 2552 | * Set the content-length field in the reply header, and |
| 2553 | * start the reply message |
| 2554 | */ |
| 2555 | pblock_nninsert("Content-Length", contentLength, rq->srvhdrs); |
| 2556 | protocol_status(sn, rq, PROTOCOL_OK, NULL); |
| 2557 | code = protocol_start_response(sn, rq); |
| 2558 | if (code != REQ_PROCEED) { |
| 2559 | afs_osi_Free(dirbuf, NSAFS_BUFFER_SIZE); |
| 2560 | nsafs_tree_free(root); |
| 2561 | return REQ_PROCEED; |
| 2562 | } |
| 2563 | |
| 2564 | /* |
| 2565 | * Send the index |
| 2566 | */ |
| 2567 | buflen = 0; |
| 2568 | code = nsafs_tree_send(sn->csd, root, dirbuf, &buflen, NSAFS_BUFFER_SIZE); |
| 2569 | if (code == IO_ERROR) { |
| 2570 | afs_osi_Free(dirbuf, NSAFS_BUFFER_SIZE); |
| 2571 | nsafs_tree_free(root); |
| 2572 | log_error(LOG_INFORM, "nsafs", sn, rq, "send_index IO_ERROR"); |
| 2573 | return REQ_EXIT; |
| 2574 | } |
| 2575 | nsafs_tree_free(root); |
| 2576 | if (buflen != 0) { |
| 2577 | code = net_write(sn->csd, dirbuf, buflen); |
| 2578 | if (code == IO_ERROR) { |
| 2579 | afs_osi_Free(dirbuf, NSAFS_BUFFER_SIZE); |
| 2580 | log_error(LOG_INFORM, "nsafs", sn, rq, "send_index IO_ERROR"); |
| 2581 | return REQ_EXIT; |
| 2582 | } |
| 2583 | } |
| 2584 | afs_osi_Free(dirbuf, NSAFS_BUFFER_SIZE); |
| 2585 | |
| 2586 | return REQ_PROCEED; |
| 2587 | } |