Talk:Apk spec: Difference between revisions

Latest revision as of 02:33, 14 August 2023

APK v2 package layout
Gzip Streams	apk-gzip-stream1	apk-gzip-stream2	apk-gzip-stream-3
Tar	apk-tar-segment-1	apk-tar-segment-2	apk-tarball
Blocks	[h1, d, ...]	[h, d, ...]	[h, d, h, d, ..., eof1, eof2 ]
Files	Package Signature	Control Data	Package Data

Index v2 layout
Gzip Streams	index-gzip-stream1	index-gzip-stream2
Tar	index-tar-segment-1	index-tar-segment-2
Blocks	[h1, d, ...]	[h, d, ..., eof1, eof2]
Files	Index Signature	Description and APKINDEX

— Preceding unsigned comment added by Mårten (talk • contribs) 12:31, 11 December 2022‎

gzip stream or gzip member

Gzip streams could perhaps be called members as the rfc1952 refers them to or the gzip documentation https://www.gnu.org/software/gzip/manual/html_node/Advanced-usage.html.

— Preceding unsigned comment added by Mårten (talk • contribs) 14:08, 2 March 2023‎

@@ Line 1: / Line 1: @@
-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
@@ Line 55: / Line 6: @@
 | '''Tar''' || apk-tar-segment-1 || apk-tar-segment-2 || apk-tarball
 |-
-| '''Blocks''' || [h1, d, ...] || [h, d, ...] || [h, d, h, d, ..., e1, e2 ]
+| '''Blocks''' || [h1, d, ...] || [h, d, ...] || [h, d, h, d, ..., eof1, eof2 ]
 |-
 | '''Files''' || Package Signature || Control Data || Package Data
@@ Line 67: / Line 18: @@
 | '''Tar''' || index-tar-segment-1 || index-tar-segment-2
 |-
-| '''Blocks''' || [h1, d, ...] || [h, d, ..., d1, d2]
+| '''Blocks''' || [h1, d, ...] || [h, d, ..., eof1, eof2]
 |-
 | '''Files''' || Index Signature || Description and APKINDEX
 |}
+<small><span class="autosigned">—&nbsp;Preceding [[Help:Signature|unsigned]] comment added by [[User:Mårten|Mårten]] ([[User talk:Mårten|{{int:talkpagelinktext}}]] • [[Special:Contributions/Mårten|{{int:contribslink}}]]) 12:31, 11 December 2022‎</span></small>
+== gzip stream or gzip member ==
+Gzip streams could perhaps be called members as the rfc1952 refers them to or the gzip documentation https://www.gnu.org/software/gzip/manual/html_node/Advanced-usage.html.
+<small><span class="autosigned">—&nbsp;Preceding [[Help:Signature|unsigned]] comment added by [[User:Mårten|Mårten]] ([[User talk:Mårten|{{int:talkpagelinktext}}]] • [[Special:Contributions/Mårten|{{int:contribslink}}]]) 14:08, 2 March 2023‎</span></small>