Talk:Apk spec: Difference between revisions

Revision as of 17:30, 11 December 2022

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-APK v2 package/index terminology
-record/block
-A 512 byte sequence of bytes, a block
-h
-header record/block
-d
-data record/block
-e1, e2
-EOF markers (two blocks 1024 bytes)
-tar archive
-A tar archive file, consiting of a set of files, a sequence of blocks ending with the eof marker blocks.
-tar segment
-A set of tar records, a sequence of tar records withouth a ending eof marker.
-gzip stream
-A stream is a sequence gzip compressed data, starting with a magic number, headers, body and an ending 8-byte trailer.
-[ ... ]
-A gzip stream containing blocks
-concatenate
-To link togther things in a series or chain. ie. concatenate.
-Concatenate 3 gzip streams sequentially in a file.
-package signature
-A single file that is a binary signature over the concatenated (control + data) gzip streams
-package signature file
-DigestRSA-PKCS1v15(SHA1( apk-gzip-stream-2 ++ apk-gzip-stream-3), DER)
-index signature file
-DigestRSA-PKCS1v15(SHA1( index-gzip-stream-2), DER)
-h
-A tar header record block
-h1
-Signature file header, permission 0644, uid 0 and gid 0.
-C: checksum
-The SHA1 hash of the "Control data" gzip stream (gzip stream 2)
 {| class="wikitable"
 |+ APK v2 package layout