Annotation of embedaddon/php/ext/zip/lib/zip_dirent.c, revision 1.1
1.1 ! misho 1: /*
! 2: zip_dirent.c -- read directory entry (local or central), clean dirent
! 3: Copyright (C) 1999-2009 Dieter Baron and Thomas Klausner
! 4:
! 5: This file is part of libzip, a library to manipulate ZIP archives.
! 6: The authors can be contacted at <libzip@nih.at>
! 7:
! 8: Redistribution and use in source and binary forms, with or without
! 9: modification, are permitted provided that the following conditions
! 10: are met:
! 11: 1. Redistributions of source code must retain the above copyright
! 12: notice, this list of conditions and the following disclaimer.
! 13: 2. Redistributions in binary form must reproduce the above copyright
! 14: notice, this list of conditions and the following disclaimer in
! 15: the documentation and/or other materials provided with the
! 16: distribution.
! 17: 3. The names of the authors may not be used to endorse or promote
! 18: products derived from this software without specific prior
! 19: written permission.
! 20:
! 21: THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
! 22: OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
! 23: WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 24: ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
! 25: DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 26: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
! 27: GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 28: INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
! 29: IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
! 30: OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
! 31: IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 32: */
! 33:
! 34:
! 35:
! 36: #include <stdio.h>
! 37: #include <stdlib.h>
! 38: #include <string.h>
! 39: #include <errno.h>
! 40: #include <sys/types.h>
! 41: #include <sys/stat.h>
! 42:
! 43: #include "zipint.h"
! 44:
! 45: static time_t _zip_d2u_time(int, int);
! 46: static char *_zip_readfpstr(FILE *, unsigned int, int, struct zip_error *);
! 47: static char *_zip_readstr(unsigned char **, int, int, struct zip_error *);
! 48: static void _zip_u2d_time(time_t, unsigned short *, unsigned short *);
! 49: static void _zip_write2(unsigned short, FILE *);
! 50: static void _zip_write4(unsigned int, FILE *);
! 51:
! 52:
! 53:
! 54: void
! 55: _zip_cdir_free(struct zip_cdir *cd)
! 56: {
! 57: int i;
! 58:
! 59: if (!cd)
! 60: return;
! 61:
! 62: for (i=0; i<cd->nentry; i++)
! 63: _zip_dirent_finalize(cd->entry+i);
! 64: free(cd->comment);
! 65: free(cd->entry);
! 66: free(cd);
! 67: }
! 68:
! 69:
! 70:
! 71: int
! 72: _zip_cdir_grow(struct zip_cdir *cd, int nentry, struct zip_error *error)
! 73: {
! 74: struct zip_dirent *entry;
! 75:
! 76: if (nentry < cd->nentry) {
! 77: _zip_error_set(error, ZIP_ER_INTERNAL, 0);
! 78: return -1;
! 79: }
! 80:
! 81: if ((entry=((struct zip_dirent *)
! 82: realloc(cd->entry, sizeof(*(cd->entry))*nentry))) == NULL) {
! 83: _zip_error_set(error, ZIP_ER_MEMORY, 0);
! 84: return -1;
! 85: }
! 86:
! 87: cd->nentry = nentry;
! 88: cd->entry = entry;
! 89:
! 90: return 0;
! 91: }
! 92:
! 93:
! 94:
! 95: struct zip_cdir *
! 96: _zip_cdir_new(int nentry, struct zip_error *error)
! 97: {
! 98: struct zip_cdir *cd;
! 99:
! 100: if ((cd=(struct zip_cdir *)malloc(sizeof(*cd))) == NULL) {
! 101: _zip_error_set(error, ZIP_ER_MEMORY, 0);
! 102: return NULL;
! 103: }
! 104:
! 105: if ((cd->entry=(struct zip_dirent *)malloc(sizeof(*(cd->entry))*nentry))
! 106: == NULL) {
! 107: _zip_error_set(error, ZIP_ER_MEMORY, 0);
! 108: free(cd);
! 109: return NULL;
! 110: }
! 111:
! 112: /* entries must be initialized by caller */
! 113:
! 114: cd->nentry = nentry;
! 115: cd->size = cd->offset = 0;
! 116: cd->comment = NULL;
! 117: cd->comment_len = 0;
! 118:
! 119: return cd;
! 120: }
! 121:
! 122:
! 123:
! 124: int
! 125: _zip_cdir_write(struct zip_cdir *cd, FILE *fp, struct zip_error *error)
! 126: {
! 127: int i;
! 128:
! 129: cd->offset = ftello(fp);
! 130:
! 131: for (i=0; i<cd->nentry; i++) {
! 132: if (_zip_dirent_write(cd->entry+i, fp, 0, error) != 0)
! 133: return -1;
! 134: }
! 135:
! 136: cd->size = ftello(fp) - cd->offset;
! 137:
! 138: /* clearerr(fp); */
! 139: fwrite(EOCD_MAGIC, 1, 4, fp);
! 140: _zip_write4(0, fp);
! 141: _zip_write2((unsigned short)cd->nentry, fp);
! 142: _zip_write2((unsigned short)cd->nentry, fp);
! 143: _zip_write4(cd->size, fp);
! 144: _zip_write4(cd->offset, fp);
! 145: _zip_write2(cd->comment_len, fp);
! 146: fwrite(cd->comment, 1, cd->comment_len, fp);
! 147:
! 148: if (ferror(fp)) {
! 149: _zip_error_set(error, ZIP_ER_WRITE, errno);
! 150: return -1;
! 151: }
! 152:
! 153: return 0;
! 154: }
! 155:
! 156:
! 157:
! 158: void
! 159: _zip_dirent_finalize(struct zip_dirent *zde)
! 160: {
! 161: free(zde->filename);
! 162: zde->filename = NULL;
! 163: free(zde->extrafield);
! 164: zde->extrafield = NULL;
! 165: free(zde->comment);
! 166: zde->comment = NULL;
! 167: }
! 168:
! 169:
! 170:
! 171: void
! 172: _zip_dirent_init(struct zip_dirent *de)
! 173: {
! 174: de->version_madeby = 0;
! 175: de->version_needed = 20; /* 2.0 */
! 176: de->bitflags = 0;
! 177: de->comp_method = 0;
! 178: de->last_mod = 0;
! 179: de->crc = 0;
! 180: de->comp_size = 0;
! 181: de->uncomp_size = 0;
! 182: de->filename = NULL;
! 183: de->filename_len = 0;
! 184: de->extrafield = NULL;
! 185: de->extrafield_len = 0;
! 186: de->comment = NULL;
! 187: de->comment_len = 0;
! 188: de->disk_number = 0;
! 189: de->int_attrib = 0;
! 190: de->ext_attrib = 0;
! 191: de->offset = 0;
! 192: }
! 193:
! 194:
! 195:
! 196: /* _zip_dirent_read(zde, fp, bufp, left, localp, error):
! 197: Fills the zip directory entry zde.
! 198:
! 199: If bufp is non-NULL, data is taken from there and bufp is advanced
! 200: by the amount of data used; otherwise data is read from fp as needed.
! 201:
! 202: if leftp is non-NULL, no more bytes than specified by it are used,
! 203: and *leftp is reduced by the number of bytes used.
! 204:
! 205: If local != 0, it reads a local header instead of a central
! 206: directory entry.
! 207:
! 208: Returns 0 if successful. On error, error is filled in and -1 is
! 209: returned.
! 210:
! 211: XXX: leftp and file position undefined on error.
! 212: */
! 213:
! 214: int
! 215: _zip_dirent_read(struct zip_dirent *zde, FILE *fp,
! 216: unsigned char **bufp, unsigned int *leftp, int local,
! 217: struct zip_error *error)
! 218: {
! 219: unsigned char buf[CDENTRYSIZE];
! 220: unsigned char *cur;
! 221: unsigned short dostime, dosdate;
! 222: unsigned int size;
! 223:
! 224: if (local)
! 225: size = LENTRYSIZE;
! 226: else
! 227: size = CDENTRYSIZE;
! 228:
! 229: if (leftp && (*leftp < size)) {
! 230: _zip_error_set(error, ZIP_ER_NOZIP, 0);
! 231: return -1;
! 232: }
! 233:
! 234: if (bufp) {
! 235: /* use data from buffer */
! 236: cur = *bufp;
! 237: }
! 238: else {
! 239: /* read entry from disk */
! 240: if ((fread(buf, 1, size, fp)<size)) {
! 241: _zip_error_set(error, ZIP_ER_READ, errno);
! 242: return -1;
! 243: }
! 244: cur = buf;
! 245: }
! 246:
! 247: if (memcmp(cur, (local ? LOCAL_MAGIC : CENTRAL_MAGIC), 4) != 0) {
! 248: _zip_error_set(error, ZIP_ER_NOZIP, 0);
! 249: return -1;
! 250: }
! 251: cur += 4;
! 252:
! 253:
! 254: /* convert buffercontents to zip_dirent */
! 255:
! 256: if (!local)
! 257: zde->version_madeby = _zip_read2(&cur);
! 258: else
! 259: zde->version_madeby = 0;
! 260: zde->version_needed = _zip_read2(&cur);
! 261: zde->bitflags = _zip_read2(&cur);
! 262: zde->comp_method = _zip_read2(&cur);
! 263:
! 264: /* convert to time_t */
! 265: dostime = _zip_read2(&cur);
! 266: dosdate = _zip_read2(&cur);
! 267: zde->last_mod = _zip_d2u_time(dostime, dosdate);
! 268:
! 269: zde->crc = _zip_read4(&cur);
! 270: zde->comp_size = _zip_read4(&cur);
! 271: zde->uncomp_size = _zip_read4(&cur);
! 272:
! 273: zde->filename_len = _zip_read2(&cur);
! 274: zde->extrafield_len = _zip_read2(&cur);
! 275:
! 276: if (local) {
! 277: zde->comment_len = 0;
! 278: zde->disk_number = 0;
! 279: zde->int_attrib = 0;
! 280: zde->ext_attrib = 0;
! 281: zde->offset = 0;
! 282: } else {
! 283: zde->comment_len = _zip_read2(&cur);
! 284: zde->disk_number = _zip_read2(&cur);
! 285: zde->int_attrib = _zip_read2(&cur);
! 286: zde->ext_attrib = _zip_read4(&cur);
! 287: zde->offset = _zip_read4(&cur);
! 288: }
! 289:
! 290: zde->filename = NULL;
! 291: zde->extrafield = NULL;
! 292: zde->comment = NULL;
! 293:
! 294: size += zde->filename_len+zde->extrafield_len+zde->comment_len;
! 295:
! 296: if (leftp && (*leftp < size)) {
! 297: _zip_error_set(error, ZIP_ER_NOZIP, 0);
! 298: return -1;
! 299: }
! 300:
! 301: if (bufp) {
! 302: if (zde->filename_len) {
! 303: zde->filename = _zip_readstr(&cur, zde->filename_len, 1, error);
! 304: if (!zde->filename)
! 305: return -1;
! 306: }
! 307:
! 308: if (zde->extrafield_len) {
! 309: zde->extrafield = _zip_readstr(&cur, zde->extrafield_len, 0,
! 310: error);
! 311: if (!zde->extrafield)
! 312: return -1;
! 313: }
! 314:
! 315: if (zde->comment_len) {
! 316: zde->comment = _zip_readstr(&cur, zde->comment_len, 0, error);
! 317: if (!zde->comment)
! 318: return -1;
! 319: }
! 320: }
! 321: else {
! 322: if (zde->filename_len) {
! 323: zde->filename = _zip_readfpstr(fp, zde->filename_len, 1, error);
! 324: if (!zde->filename)
! 325: return -1;
! 326: }
! 327:
! 328: if (zde->extrafield_len) {
! 329: zde->extrafield = _zip_readfpstr(fp, zde->extrafield_len, 0,
! 330: error);
! 331: if (!zde->extrafield)
! 332: return -1;
! 333: }
! 334:
! 335: if (zde->comment_len) {
! 336: zde->comment = _zip_readfpstr(fp, zde->comment_len, 0, error);
! 337: if (!zde->comment)
! 338: return -1;
! 339: }
! 340: }
! 341:
! 342: if (bufp)
! 343: *bufp = cur;
! 344: if (leftp)
! 345: *leftp -= size;
! 346:
! 347: return 0;
! 348: }
! 349:
! 350:
! 351:
! 352: /* _zip_dirent_torrent_normalize(de);
! 353: Set values suitable for torrentzip.
! 354: */
! 355:
! 356: void
! 357: _zip_dirent_torrent_normalize(struct zip_dirent *de)
! 358: {
! 359: static struct tm torrenttime;
! 360: static time_t last_mod = 0;
! 361:
! 362: if (last_mod == 0) {
! 363: #ifdef HAVE_STRUCT_TM_TM_ZONE
! 364: time_t now;
! 365: struct tm *l;
! 366: #endif
! 367:
! 368: torrenttime.tm_sec = 0;
! 369: torrenttime.tm_min = 32;
! 370: torrenttime.tm_hour = 23;
! 371: torrenttime.tm_mday = 24;
! 372: torrenttime.tm_mon = 11;
! 373: torrenttime.tm_year = 96;
! 374: torrenttime.tm_wday = 0;
! 375: torrenttime.tm_yday = 0;
! 376: torrenttime.tm_isdst = 0;
! 377:
! 378: #ifdef HAVE_STRUCT_TM_TM_ZONE
! 379: time(&now);
! 380: l = localtime(&now);
! 381: torrenttime.tm_gmtoff = l->tm_gmtoff;
! 382: torrenttime.tm_zone = l->tm_zone;
! 383: #endif
! 384:
! 385: last_mod = mktime(&torrenttime);
! 386: }
! 387:
! 388: de->version_madeby = 0;
! 389: de->version_needed = 20; /* 2.0 */
! 390: de->bitflags = 2; /* maximum compression */
! 391: de->comp_method = ZIP_CM_DEFLATE;
! 392: de->last_mod = last_mod;
! 393:
! 394: de->disk_number = 0;
! 395: de->int_attrib = 0;
! 396: de->ext_attrib = 0;
! 397: de->offset = 0;
! 398:
! 399: free(de->extrafield);
! 400: de->extrafield = NULL;
! 401: de->extrafield_len = 0;
! 402: free(de->comment);
! 403: de->comment = NULL;
! 404: de->comment_len = 0;
! 405: }
! 406:
! 407:
! 408:
! 409: /* _zip_dirent_write(zde, fp, localp, error):
! 410: Writes zip directory entry zde to file fp.
! 411:
! 412: If localp != 0, it writes a local header instead of a central
! 413: directory entry.
! 414:
! 415: Returns 0 if successful. On error, error is filled in and -1 is
! 416: returned.
! 417: */
! 418:
! 419: int
! 420: _zip_dirent_write(struct zip_dirent *zde, FILE *fp, int localp,
! 421: struct zip_error *error)
! 422: {
! 423: unsigned short dostime, dosdate;
! 424:
! 425: fwrite(localp ? LOCAL_MAGIC : CENTRAL_MAGIC, 1, 4, fp);
! 426:
! 427: if (!localp)
! 428: _zip_write2(zde->version_madeby, fp);
! 429: _zip_write2(zde->version_needed, fp);
! 430: _zip_write2(zde->bitflags, fp);
! 431: _zip_write2(zde->comp_method, fp);
! 432:
! 433: _zip_u2d_time(zde->last_mod, &dostime, &dosdate);
! 434: _zip_write2(dostime, fp);
! 435: _zip_write2(dosdate, fp);
! 436:
! 437: _zip_write4(zde->crc, fp);
! 438: _zip_write4(zde->comp_size, fp);
! 439: _zip_write4(zde->uncomp_size, fp);
! 440:
! 441: _zip_write2(zde->filename_len, fp);
! 442: _zip_write2(zde->extrafield_len, fp);
! 443:
! 444: if (!localp) {
! 445: _zip_write2(zde->comment_len, fp);
! 446: _zip_write2(zde->disk_number, fp);
! 447: _zip_write2(zde->int_attrib, fp);
! 448: _zip_write4(zde->ext_attrib, fp);
! 449: _zip_write4(zde->offset, fp);
! 450: }
! 451:
! 452: if (zde->filename_len)
! 453: fwrite(zde->filename, 1, zde->filename_len, fp);
! 454:
! 455: if (zde->extrafield_len)
! 456: fwrite(zde->extrafield, 1, zde->extrafield_len, fp);
! 457:
! 458: if (!localp) {
! 459: if (zde->comment_len)
! 460: fwrite(zde->comment, 1, zde->comment_len, fp);
! 461: }
! 462:
! 463: if (ferror(fp)) {
! 464: _zip_error_set(error, ZIP_ER_WRITE, errno);
! 465: return -1;
! 466: }
! 467:
! 468: return 0;
! 469: }
! 470:
! 471:
! 472:
! 473: static time_t
! 474: _zip_d2u_time(int dtime, int ddate)
! 475: {
! 476: struct tm tm = {0};
! 477:
! 478: /* let mktime decide if DST is in effect */
! 479: tm.tm_isdst = -1;
! 480:
! 481: tm.tm_year = ((ddate>>9)&127) + 1980 - 1900;
! 482: tm.tm_mon = ((ddate>>5)&15) - 1;
! 483: tm.tm_mday = ddate&31;
! 484:
! 485: tm.tm_hour = (dtime>>11)&31;
! 486: tm.tm_min = (dtime>>5)&63;
! 487: tm.tm_sec = (dtime<<1)&62;
! 488:
! 489: return mktime(&tm);
! 490: }
! 491:
! 492:
! 493:
! 494: unsigned short
! 495: _zip_read2(unsigned char **a)
! 496: {
! 497: unsigned short ret;
! 498:
! 499: ret = (*a)[0]+((*a)[1]<<8);
! 500: *a += 2;
! 501:
! 502: return ret;
! 503: }
! 504:
! 505:
! 506:
! 507: unsigned int
! 508: _zip_read4(unsigned char **a)
! 509: {
! 510: unsigned int ret;
! 511:
! 512: ret = ((((((*a)[3]<<8)+(*a)[2])<<8)+(*a)[1])<<8)+(*a)[0];
! 513: *a += 4;
! 514:
! 515: return ret;
! 516: }
! 517:
! 518:
! 519:
! 520: static char *
! 521: _zip_readfpstr(FILE *fp, unsigned int len, int nulp, struct zip_error *error)
! 522: {
! 523: char *r, *o;
! 524:
! 525: r = (char *)malloc(nulp ? len+1 : len);
! 526: if (!r) {
! 527: _zip_error_set(error, ZIP_ER_MEMORY, 0);
! 528: return NULL;
! 529: }
! 530:
! 531: if (fread(r, 1, len, fp)<len) {
! 532: free(r);
! 533: _zip_error_set(error, ZIP_ER_READ, errno);
! 534: return NULL;
! 535: }
! 536:
! 537: if (nulp) {
! 538: /* replace any in-string NUL characters with spaces */
! 539: r[len] = 0;
! 540: for (o=r; o<r+len; o++)
! 541: if (*o == '\0')
! 542: *o = ' ';
! 543: }
! 544:
! 545: return r;
! 546: }
! 547:
! 548:
! 549:
! 550: static char *
! 551: _zip_readstr(unsigned char **buf, int len, int nulp, struct zip_error *error)
! 552: {
! 553: char *r, *o;
! 554:
! 555: r = (char *)malloc(nulp ? len+1 : len);
! 556: if (!r) {
! 557: _zip_error_set(error, ZIP_ER_MEMORY, 0);
! 558: return NULL;
! 559: }
! 560:
! 561: memcpy(r, *buf, len);
! 562: *buf += len;
! 563:
! 564: if (nulp) {
! 565: /* replace any in-string NUL characters with spaces */
! 566: r[len] = 0;
! 567: for (o=r; o<r+len; o++)
! 568: if (*o == '\0')
! 569: *o = ' ';
! 570: }
! 571:
! 572: return r;
! 573: }
! 574:
! 575:
! 576:
! 577: static void
! 578: _zip_write2(unsigned short i, FILE *fp)
! 579: {
! 580: putc(i&0xff, fp);
! 581: putc((i>>8)&0xff, fp);
! 582:
! 583: return;
! 584: }
! 585:
! 586:
! 587:
! 588: static void
! 589: _zip_write4(unsigned int i, FILE *fp)
! 590: {
! 591: putc(i&0xff, fp);
! 592: putc((i>>8)&0xff, fp);
! 593: putc((i>>16)&0xff, fp);
! 594: putc((i>>24)&0xff, fp);
! 595:
! 596: return;
! 597: }
! 598:
! 599:
! 600:
! 601: static void
! 602: _zip_u2d_time(time_t time, unsigned short *dtime, unsigned short *ddate)
! 603: {
! 604: struct tm *tm;
! 605:
! 606: tm = localtime(&time);
! 607: *ddate = ((tm->tm_year+1900-1980)<<9) + ((tm->tm_mon+1)<<5)
! 608: + tm->tm_mday;
! 609: *dtime = ((tm->tm_hour)<<11) + ((tm->tm_min)<<5)
! 610: + ((tm->tm_sec)>>1);
! 611:
! 612: return;
! 613: }
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