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1 | 7-Zip method IDs for 7z and xz archives\r |
2 | ---------------------------------------\r |
3 | \r |
4 | Version: 18.06\r |
5 | Date: 2018-06-30\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 | \r |
126 | 10 xx - reserved (LZHAM)\r |
127 | 01 - LZHAM\r |
128 | \r |
129 | 11 xx - reserved (Tino Reichardt)\r |
130 | 01 - ZSTD\r |
131 | 02 - BROTLI\r |
132 | 04 - LZ4\r |
133 | 05 - LZ5\r |
134 | 06 - LIZARD\r |
135 | \r |
136 | 12 xx - reserverd (Denis Anisimov)\r |
137 | \r |
138 | 01 - WavPack2\r |
139 | FE - eSplitter \r |
140 | FF - RawSplitter\r |
141 | \r |
142 | \r |
143 | 06.. - Crypto \r |
144 | \r |
145 | F0 - Ciphers without hashing algo\r |
146 | \r |
147 | 01 - [AES]\r |
148 | 0x - AES-128\r |
149 | 4x - AES-192\r |
150 | 8x - AES-256\r |
151 | Cx - AES\r |
152 | \r |
153 | x0 - ECB\r |
154 | x1 - CBC\r |
155 | x2 - CFB\r |
156 | x3 - OFB\r |
157 | x4 - CTR\r |
158 | \r |
159 | F1 - Combine Ciphers\r |
160 | \r |
161 | 01 - [Zip]\r |
162 | 01 - ZipCrypto (Main Zip crypto algo)\r |
163 | \r |
164 | 03 - [RAR]\r |
165 | 02 - \r |
166 | 03 - Rar29AES (AES-128 + modified SHA-1)\r |
167 | \r |
168 | 07 - [7z]\r |
169 | 01 - 7zAES (AES-256 + SHA-256)\r |
170 | \r |
171 | \r |
172 | ---\r |
173 | End of document\r |