1 /*- 2 * Copyright (c) 2003-2008 Tim Kientzle 3 * Copyright (c) 2008 Anselm Strauss 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 /* 28 * Development supported by Google Summer of Code 2008. 29 */ 30 31 #include "test.h" 32 __FBSDID("$FreeBSD$"); 33 34 /* 35 * Detailed byte-for-byte verification of the format of a zip archive 36 * with a single file written to it that uses Zip64 extensions. 37 */ 38 39 static unsigned long 40 bitcrc32(unsigned long c, void *_p, size_t s) 41 { 42 /* This is a drop-in replacement for crc32() from zlib. 43 * Libarchive should be able to correctly generate 44 * uncompressed zip archives (including correct CRCs) even 45 * when zlib is unavailable, and this function helps us verify 46 * that. Yes, this is very, very slow and unsuitable for 47 * production use, but it's correct, compact, and works well 48 * enough for this particular usage. Libarchive internally 49 * uses a much more efficient implementation. */ 50 const unsigned char *p = _p; 51 int bitctr; 52 53 if (p == NULL) 54 return (0); 55 56 for (; s > 0; --s) { 57 c ^= *p++; 58 for (bitctr = 8; bitctr > 0; --bitctr) { 59 if (c & 1) c = (c >> 1); 60 else c = (c >> 1) ^ 0xedb88320; 61 c ^= 0x80000000; 62 } 63 } 64 return (c); 65 } 66 67 /* Quick and dirty: Read 2-byte and 4-byte integers from Zip file. */ 68 static unsigned i2(const unsigned char *p) { return ((p[0] & 0xff) | ((p[1] & 0xff) << 8)); } 69 static unsigned i4(const unsigned char *p) { return (i2(p) | (i2(p + 2) << 16)); } 70 /* We're only working with small values here; ignore the 4 high bytes. */ 71 static unsigned i8(const unsigned char *p) { return (i4(p)); } 72 73 DEFINE_TEST(test_write_format_zip_file_zip64) 74 { 75 struct archive *a; 76 struct archive_entry *ae; 77 time_t t = 1234567890; 78 struct tm *tm = localtime(&t); 79 size_t used, buffsize = 1000000; 80 unsigned long crc; 81 int file_perm = 00644; 82 int zip_version = 45; 83 int zip_compression = 8; 84 short file_uid = 10, file_gid = 20; 85 unsigned char *buff, *buffend, *p; 86 unsigned char *central_header, *local_header, *eocd, *eocd_record; 87 unsigned char *extension_start, *extension_end; 88 char file_data[] = {'1', '2', '3', '4', '5', '6', '7', '8'}; 89 char *file_name = "file"; 90 91 #ifndef HAVE_ZLIB_H 92 zip_compression = 0; 93 #endif 94 95 buff = malloc(buffsize); 96 97 /* Create a new archive in memory. */ 98 assert((a = archive_write_new()) != NULL); 99 assertEqualIntA(a, ARCHIVE_OK, archive_write_set_format_zip(a)); 100 assertEqualIntA(a, ARCHIVE_OK, 101 archive_write_set_options(a, "zip:zip64")); 102 assertEqualIntA(a, ARCHIVE_OK, 103 archive_write_set_options(a, "zip:experimental")); 104 assertEqualIntA(a, ARCHIVE_OK, 105 archive_write_open_memory(a, buff, buffsize, &used)); 106 107 assert((ae = archive_entry_new()) != NULL); 108 archive_entry_copy_pathname(ae, file_name); 109 archive_entry_set_mode(ae, AE_IFREG | file_perm); 110 archive_entry_set_size(ae, sizeof(file_data)); 111 archive_entry_set_uid(ae, file_uid); 112 archive_entry_set_gid(ae, file_gid); 113 archive_entry_set_mtime(ae, t, 0); 114 assertEqualInt(0, archive_write_header(a, ae)); 115 archive_entry_free(ae); 116 assertEqualInt(8, archive_write_data(a, file_data, sizeof(file_data))); 117 assertEqualIntA(a, ARCHIVE_OK, archive_write_close(a)); 118 assertEqualInt(ARCHIVE_OK, archive_write_free(a)); 119 buffend = buff + used; 120 dumpfile("constructed.zip", buff, used); 121 122 /* Verify "End of Central Directory" record. */ 123 /* Get address of end-of-central-directory record. */ 124 eocd_record = p = buffend - 22; /* Assumes there is no zip comment field. */ 125 failure("End-of-central-directory begins with PK\\005\\006 signature"); 126 assertEqualMem(p, "PK\005\006", 4); 127 failure("This must be disk 0"); 128 assertEqualInt(i2(p + 4), 0); 129 failure("Central dir must start on disk 0"); 130 assertEqualInt(i2(p + 6), 0); 131 failure("All central dir entries are on this disk"); 132 assertEqualInt(i2(p + 8), i2(p + 10)); 133 eocd = buff + i4(p + 12) + i4(p + 16); 134 failure("no zip comment"); 135 assertEqualInt(i2(p + 20), 0); 136 137 /* Get address of first entry in central directory. */ 138 central_header = p = buff + i4(buffend - 6); 139 failure("Central file record at offset %d should begin with" 140 " PK\\001\\002 signature", 141 i4(buffend - 10)); 142 143 /* Verify file entry in central directory. */ 144 assertEqualMem(p, "PK\001\002", 4); /* Signature */ 145 assertEqualInt(i2(p + 4), 3 * 256 + zip_version); /* Version made by */ 146 assertEqualInt(i2(p + 6), zip_version); /* Version needed to extract */ 147 assertEqualInt(i2(p + 8), 8); /* Flags */ 148 assertEqualInt(i2(p + 10), zip_compression); /* Compression method */ 149 assertEqualInt(i2(p + 12), (tm->tm_hour * 2048) + (tm->tm_min * 32) + (tm->tm_sec / 2)); /* File time */ 150 assertEqualInt(i2(p + 14), ((tm->tm_year - 80) * 512) + ((tm->tm_mon + 1) * 32) + tm->tm_mday); /* File date */ 151 crc = bitcrc32(0, file_data, sizeof(file_data)); 152 assertEqualInt(i4(p + 16), crc); /* CRC-32 */ 153 /* assertEqualInt(i4(p + 20), sizeof(file_data)); */ /* Compressed size */ 154 assertEqualInt(i4(p + 24), sizeof(file_data)); /* Uncompressed size */ 155 assertEqualInt(i2(p + 28), strlen(file_name)); /* Pathname length */ 156 /* assertEqualInt(i2(p + 30), 28); */ /* Extra field length: See below */ 157 assertEqualInt(i2(p + 32), 0); /* File comment length */ 158 assertEqualInt(i2(p + 34), 0); /* Disk number start */ 159 assertEqualInt(i2(p + 36), 0); /* Internal file attrs */ 160 assertEqualInt(i4(p + 38) >> 16 & 01777, file_perm); /* External file attrs */ 161 assertEqualInt(i4(p + 42), 0); /* Offset of local header */ 162 assertEqualMem(p + 46, file_name, strlen(file_name)); /* Pathname */ 163 p = extension_start = central_header + 46 + strlen(file_name); 164 extension_end = extension_start + i2(central_header + 30); 165 166 assertEqualInt(i2(p), 0x5455); /* 'UT' extension header */ 167 assertEqualInt(i2(p + 2), 5); /* 'UT' size */ 168 assertEqualInt(p[4], 1); /* 'UT' flags */ 169 assertEqualInt(i4(p + 5), t); /* 'UT' mtime */ 170 p += 4 + i2(p + 2); 171 172 assertEqualInt(i2(p), 0x7875); /* 'ux' extension header */ 173 assertEqualInt(i2(p + 2), 11); /* 'ux' size */ 174 /* TODO: verify 'ux' contents */ 175 p += 4 + i2(p + 2); 176 177 /* Note: We don't expect to see zip64 extension in the central 178 * directory, since the writer knows the actual full size by 179 * the time it is ready to write the central directory and has 180 * no reason to insert it then. Info-Zip seems to do the same 181 * thing. */ 182 183 /* Just in case: Report any extra extensions. */ 184 while (p < extension_end) { 185 failure("Unexpected extension 0x%04X", i2(p)); 186 assert(0); 187 p += 4 + i2(p + 2); 188 } 189 190 /* Should have run exactly to end of extra data. */ 191 assert(p == extension_end); 192 193 assert(p == eocd); 194 195 /* After Central dir, we find Zip64 eocd and Zip64 eocd locator. */ 196 assertEqualMem(p, "PK\006\006", 4); /* Zip64 eocd */ 197 assertEqualInt(i8(p + 4), 44); /* We're using v1 Zip64 eocd */ 198 assertEqualInt(i2(p + 12), 45); /* Written by Version 4.5 */ 199 assertEqualInt(i2(p + 14), 45); /* Needs version 4.5 to extract */ 200 assertEqualInt(i4(p + 16), 0); /* This is disk #0 */ 201 assertEqualInt(i4(p + 20), 0); /* Dir starts on disk #0 */ 202 assertEqualInt(i8(p + 24), 1); /* 1 entry on this disk */ 203 assertEqualInt(i8(p + 32), 1); /* 1 entry total */ 204 assertEqualInt(i8(p + 40), eocd - central_header); /* size of cd */ 205 assertEqualInt(i8(p + 48), central_header - buff); /* start of cd */ 206 p += 12 + i8(p + 4); 207 208 assertEqualMem(p, "PK\006\007", 4); /* Zip64 eocd locator */ 209 assertEqualInt(i4(p + 4), 0); /* Zip64 eocd is on disk #0 */ 210 assertEqualInt(i8(p + 8), eocd - buff); /* Offset of Zip64 eocd */ 211 assertEqualInt(i4(p + 16), 1); /* 1 disk */ 212 p += 20; 213 214 /* Regular EOCD immediately follows Zip64 records. */ 215 assert(p == eocd_record); 216 217 /* Verify local header of file entry. */ 218 p = local_header = buff; 219 assertEqualMem(p, "PK\003\004", 4); /* Signature */ 220 assertEqualInt(i2(p + 4), zip_version); /* Version needed to extract */ 221 assertEqualInt(i2(p + 6), 8); /* Flags */ 222 assertEqualInt(i2(p + 8), zip_compression); /* Compression method */ 223 assertEqualInt(i2(p + 10), (tm->tm_hour * 2048) + (tm->tm_min * 32) + (tm->tm_sec / 2)); /* File time */ 224 assertEqualInt(i2(p + 12), ((tm->tm_year - 80) * 512) + ((tm->tm_mon + 1) * 32) + tm->tm_mday); /* File date */ 225 assertEqualInt(i4(p + 14), 0); /* CRC-32 */ 226 /* assertEqualInt(i4(p + 18), sizeof(file_data)); */ /* Compressed size */ 227 /* assertEqualInt(i4(p + 22), sizeof(file_data)); */ /* Uncompressed size not stored because we're using length-at-end. */ 228 assertEqualInt(i2(p + 26), strlen(file_name)); /* Pathname length */ 229 assertEqualInt(i2(p + 28), 57); /* Extra field length */ 230 assertEqualMem(p + 30, file_name, strlen(file_name)); /* Pathname */ 231 p = extension_start = local_header + 30 + strlen(file_name); 232 extension_end = extension_start + i2(local_header + 28); 233 234 assertEqualInt(i2(p), 0x5455); /* 'UT' extension header */ 235 assertEqualInt(i2(p + 2), 5); /* 'UT' size */ 236 assertEqualInt(p[4], 1); /* 'UT' flags */ 237 assertEqualInt(i4(p + 5), t); /* 'UT' mtime */ 238 p += 4 + i2(p + 2); 239 240 assertEqualInt(i2(p), 0x7875); /* 'ux' extension header */ 241 assertEqualInt(i2(p + 2), 11); /* 'ux' size */ 242 assertEqualInt(p[4], 1); /* 'ux' version */ 243 assertEqualInt(p[5], 4); /* 'ux' uid size */ 244 assertEqualInt(i4(p + 6), file_uid); /* 'Ux' UID */ 245 assertEqualInt(p[10], 4); /* 'ux' gid size */ 246 assertEqualInt(i4(p + 11), file_gid); /* 'Ux' GID */ 247 p += 4 + i2(p + 2); 248 249 assertEqualInt(i2(p), 0x0001); /* Zip64 extension header */ 250 assertEqualInt(i2(p + 2), 16); /* size */ 251 assertEqualInt(i8(p + 4), 8); /* uncompressed file size */ 252 /* compressed file size we can't verify here */ 253 p += 4 + i2(p + 2); 254 255 assertEqualInt(i2(p), 0x6c78); /* 'xl' experimental extension header */ 256 assertEqualInt(i2(p + 2), 9); /* size */ 257 assertEqualInt(p[4], 7); /* bitmap of included fields */ 258 assertEqualInt(i2(p + 5) >> 8, 3); /* system & version made by */ 259 assertEqualInt(i2(p + 7), 0); /* internal file attributes */ 260 assertEqualInt(i4(p + 9) >> 16 & 01777, file_perm); /* external file attributes */ 261 p += 4 + i2(p + 2); 262 263 /* Just in case: Report any extra extensions. */ 264 while (p < extension_end) { 265 failure("Unexpected extension 0x%04X", i2(p)); 266 assert(0); 267 p += 4 + i2(p + 2); 268 } 269 270 /* Should have run exactly to end of extra data. */ 271 assert(p == extension_end); 272 273 /* Data descriptor should follow compressed data. */ 274 while (p < central_header && memcmp(p, "PK\007\010", 4) != 0) 275 ++p; 276 assertEqualMem(p, "PK\007\010", 4); 277 assertEqualInt(i4(p + 4), crc); /* CRC-32 */ 278 /* assertEqualInt(i8(p + 8), ???); */ /* compressed size */ 279 assertEqualInt(i8(p + 16), sizeof(file_data)); /* uncompressed size */ 280 281 /* Central directory should immediately follow the only entry. */ 282 assert(p + 24 == central_header); 283 284 free(buff); 285 } 286