| 1 | 7-Zip method IDs for 7z and xz archives\r |
| 2 | ---------------------------------------\r |
| 3 | \r |
| 4 | Version: 16.03\r |
| 5 | Date: 2016-09-27\r |
| 6 | \r |
| 7 | Each compression or crypto method in 7z is associated with unique binary value (ID).\r |
| 8 | The length of ID in bytes is arbitrary but it can not exceed 63 bits (8 bytes).\r |
| 9 | \r |
| 10 | xz and 7z formats use same ID map.\r |
| 11 | \r |
| 12 | If you want to add some new ID, you have two ways:\r |
| 13 | 1) Write request for allocating IDs to 7-Zip developers.\r |
| 14 | 2) Generate 8-bytes ID:\r |
| 15 | \r |
| 16 | 3F ZZ ZZ ZZ ZZ ZZ MM MM \r |
| 17 | \r |
| 18 | 3F - Prefix for random IDs (1 byte)\r |
| 19 | ZZ ZZ ZZ ZZ ZZ - Developer ID (5 bytes). Use real random bytes. \r |
| 20 | \r |
| 21 | MM MM - Method ID (2 bytes)\r |
| 22 | \r |
| 23 | You can notify 7-Zip developers about your Developer ID / Method ID.\r |
| 24 | \r |
| 25 | Note: Use new ID, if old codec can not decode data encoded with new version.\r |
| 26 | \r |
| 27 | \r |
| 28 | List of defined IDs\r |
| 29 | -------------------\r |
| 30 | \r |
| 31 | 00 - Copy\r |
| 32 | \r |
| 33 | 03 - Delta\r |
| 34 | 04 - BCJ (x86)\r |
| 35 | 05 - PPC (big-endian)\r |
| 36 | 06 - IA64\r |
| 37 | 07 - ARM (little-endian)\r |
| 38 | 08 - ARMT (little-endian)\r |
| 39 | 09 - SPARC\r |
| 40 | \r |
| 41 | 21 - LZMA2\r |
| 42 | \r |
| 43 | 02.. - Common\r |
| 44 | 03 [Swap]\r |
| 45 | - 2 Swap2\r |
| 46 | - 4 Swap4\r |
| 47 | \r |
| 48 | 03.. - 7z\r |
| 49 | 01 - \r |
| 50 | 01 - LZMA\r |
| 51 | \r |
| 52 | 03 - [Branch Codecs]\r |
| 53 | 01 - [x86 Codecs]\r |
| 54 | 03 - BCJ\r |
| 55 | 1B - BCJ2 (4 packed streams)\r |
| 56 | 02 - \r |
| 57 | 05 - PPC (big-endian)\r |
| 58 | 03 - \r |
| 59 | 01 - Alpha\r |
| 60 | 04 - \r |
| 61 | 01 - IA64\r |
| 62 | 05 - \r |
| 63 | 01 - ARM (little-endian)\r |
| 64 | 06 - \r |
| 65 | 05 - M68 (big-endian)\r |
| 66 | 07 - \r |
| 67 | 01 - ARMT (little-endian)\r |
| 68 | 08 - \r |
| 69 | 05 - SPARC\r |
| 70 | \r |
| 71 | 04 - \r |
| 72 | 01 - PPMD\r |
| 73 | \r |
| 74 | 7F -\r |
| 75 | 01 - experimental method.\r |
| 76 | \r |
| 77 | \r |
| 78 | 04.. - Misc codecs\r |
| 79 | \r |
| 80 | 00 - Reserved\r |
| 81 | \r |
| 82 | 01 - [Zip]\r |
| 83 | 00 - Copy (not used. Use {00} instead)\r |
| 84 | 01 - Shrink\r |
| 85 | 06 - Implode\r |
| 86 | 08 - Deflate\r |
| 87 | 09 - Deflate64\r |
| 88 | 0A - Imploding\r |
| 89 | 0C - BZip2 (not used. Use {040202} instead)\r |
| 90 | 0E - LZMA (LZMA-zip)\r |
| 91 | 5F - xz\r |
| 92 | 60 - Jpeg\r |
| 93 | 61 - WavPack\r |
| 94 | 62 - PPMd (PPMd-zip)\r |
| 95 | 63 - wzAES\r |
| 96 | \r |
| 97 | 02 - \r |
| 98 | 02 - BZip2\r |
| 99 | \r |
| 100 | 03 - [Rar]\r |
| 101 | 01 - Rar1\r |
| 102 | 02 - Rar2\r |
| 103 | 03 - Rar3\r |
| 104 | 05 - Rar5\r |
| 105 | \r |
| 106 | 04 - [Arj]\r |
| 107 | 01 - Arj(1,2,3)\r |
| 108 | 02 - Arj4\r |
| 109 | \r |
| 110 | 05 - [Z]\r |
| 111 | \r |
| 112 | 06 - [Lzh]\r |
| 113 | \r |
| 114 | 07 - Reserved for 7z\r |
| 115 | \r |
| 116 | 08 - [Cab]\r |
| 117 | \r |
| 118 | 09 - [NSIS]\r |
| 119 | 01 - DeflateNSIS\r |
| 120 | 02 - BZip2NSIS\r |
| 121 | \r |
| 122 | F7 - External codecs (that are not included to 7-Zip)\r |
| 123 | \r |
| 124 | 0x xx - reserved\r |
| 125 | 10 xx - reserved (LZHAM)\r |
| 126 | 11 xx - reserved (Zstd)\r |
| 127 | \r |
| 128 | \r |
| 129 | 06.. - Crypto \r |
| 130 | \r |
| 131 | F0 - Ciphers without hashing algo\r |
| 132 | \r |
| 133 | 01 - [AES]\r |
| 134 | 0x - AES-128\r |
| 135 | 4x - AES-192\r |
| 136 | 8x - AES-256\r |
| 137 | Cx - AES\r |
| 138 | \r |
| 139 | x0 - ECB\r |
| 140 | x1 - CBC\r |
| 141 | x2 - CFB\r |
| 142 | x3 - OFB\r |
| 143 | x4 - CTR\r |
| 144 | \r |
| 145 | F1 - Combine Ciphers\r |
| 146 | \r |
| 147 | 01 - [Zip]\r |
| 148 | 01 - ZipCrypto (Main Zip crypto algo)\r |
| 149 | \r |
| 150 | 03 - [RAR]\r |
| 151 | 02 - \r |
| 152 | 03 - Rar29AES (AES-128 + modified SHA-1)\r |
| 153 | \r |
| 154 | 07 - [7z]\r |
| 155 | 01 - 7zAES (AES-256 + SHA-256)\r |
| 156 | \r |
| 157 | \r |
| 158 | ---\r |
| 159 | End of document\r |