142 lines
2.6 KiB
Text
142 lines
2.6 KiB
Text
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7-Zip method IDs (4.56)
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-----------------------
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Each compression or crypto method in 7z has unique binary value (ID).
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The length of ID in bytes is arbitrary but it can not exceed 63 bits (8 bytes).
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If you want to add some new ID, you have two ways:
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1) Write request for allocating IDs to 7-zip developers.
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2) Generate 8-bytes ID:
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7F ZZ ZZ ZZ ZZ ZZ MM MM
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7F - Prefix for random IDs (1 byte)
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ZZ ZZ ZZ ZZ ZZ - Developer ID (5 bytes). Use real random bytes.
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MM MM - Method ID (2 bytes)
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You can notify 7-Zip developers about your Developer ID / Method ID.
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Note: Use new ID only if old codec can not decode data encoded with new version.
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List of defined IDs
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-------------------
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00 - Copy
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01 - Reserved
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02 - Common
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03 Swap
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- 2 Swap2
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- 4 Swap4
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04 Delta (subject to change)
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03 - 7z
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01 - LZMA
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01 - Version
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03 - Branch
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01 - x86
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03 - BCJ
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1B - BCJ2
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02 - PPC
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05 - BC_PPC_B (Big Endian)
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03 - Alpha
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01 - BC_Alpha
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04 - IA64
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01 - BC_IA64
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05 - ARM
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01 - BC_ARM
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06 - M68
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05 - BC_M68_B (Big Endian)
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07 - ARM Thumb
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01 - BC_ARMThumb
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08 - SPARC
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05 - BC_SPARC
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04 - PPMD
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01 - Version
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7F -
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01 - experimental methods.
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80 - reserved for independent developers
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E0 - Random IDs
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04 - Misc
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00 - Reserved
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01 - Zip
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00 - Copy (not used). Use {00} instead
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01 - Shrink
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06 - Implode
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08 - Deflate
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09 - Deflate64
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12 - BZip2 (not used). Use {04 02 02} instead
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02 - BZip
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02 - BZip2
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03 - Rar
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01 - Rar15
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02 - Rar20
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03 - Rar29
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04 - Arj
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01 - Arj (1,2,3)
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02 - Arj 4
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05 - Z
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06 - Lzh
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07 - Reserved for 7z
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08 - Cab
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09 - NSIS
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01 - DeflateNSIS
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02 - BZip2NSIS
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06 - Crypto
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00 -
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01 - AES
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0x - AES-128
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4x - AES-192
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8x - AES-256
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Cx - AES
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x0 - ECB
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x1 - CBC
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x2 - CFB
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x3 - OFB
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07 - Reserved
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0F - Reserved
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F0 - Misc Ciphers (Real Ciphers without hashing algo)
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F1 - Misc Ciphers (Combine)
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01 - Zip
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01 - Main Zip crypto algo
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03 - RAR
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02 -
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03 - Rar29 AES-128 + (modified SHA-1)
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07 - 7z
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01 - AES-256 + SHA-256
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07 - Hash (subject to change)
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00 -
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01 - CRC
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02 - SHA-1
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03 - SHA-256
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04 - SHA-384
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05 - SHA-512
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F0 - Misc Hash
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F1 - Misc
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03 - RAR
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03 - Rar29 Password Hashing (modified SHA1)
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07 - 7z
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01 - SHA-256 Password Hashing
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---
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End of document
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