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Difference between revisions of "Equinox/p2/Proposals/StoringChecksums"

< Equinox‎ | p2
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p2 is able to check integrity of downloaded artifacts using [https://en.wikipedia.org/wiki/MD5 MD5 algorithm] only. {{bug|423715}} is going to add support for SHA-256 algorithm but the way artifact's MD5 checksum stored in artifact metadata is not ready for such minor extension ([https://git.eclipse.org/r/59612 Gerrit change #59612] shows how adding SHA-256 support looks like using the same approach as MD5).
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In a long run, however, this solution is not future-proof.
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== Separate property for every checksum type (artifact + download) and supprted algorithm ==
 
== Separate property for every checksum type (artifact + download) and supprted algorithm ==
 
Ugly and hard to extend:
 
Ugly and hard to extend:

Revision as of 09:06, 26 March 2016

p2 is able to check integrity of downloaded artifacts using MD5 algorithm only. bug 423715 is going to add support for SHA-256 algorithm but the way artifact's MD5 checksum stored in artifact metadata is not ready for such minor extension (Gerrit change #59612 shows how adding SHA-256 support looks like using the same approach as MD5).

In a long run, however, this solution is not future-proof.

Separate property for every checksum type (artifact + download) and supprted algorithm

Ugly and hard to extend:

 <artifact classifier='osgi.bundle' id='org.eclipse.osgi' version='3.4.3.R34x_v20081215-1030'>
   <properties>
     <property name='artifact.md5' value='58057045158895009b845b9a93f3eb6e'/>
     <property name='artifact.sha256' value='58057045158895009b845b9a93f3eb6e58057045158895009b845b9a93f3eb6e'/>
     <property name='download.md5' value='58057045158895009b845b9a93f3eb6e'/>
     <property name='download.sha256' value='58057045158895009b845b9a93f3eb6e58057045158895009b845b9a93f3eb6e'/>
   </properties>
 </artifact>

Separate property for artifact and download checksums

With a map(checksumAlgo, checksumValue) - still ugly but easier to extend:

 <artifact classifier='osgi.bundle' id='org.eclipse.osgi' version='3.4.3.R34x_v20081215-1030'>
   <properties>
     <property name='artifact.checksums' value='md5=58057045158895009b845b9a93f3eb6e;sha256=58057045158895009b845b9a93f3eb6e58057045158895009b845b9a93f3eb6e'/>
     <property name='download.checksums' value='md5=58057045158895009b845b9a93f3eb6e;sha256=58057045158895009b845b9a93f3eb6e58057045158895009b845b9a93f3eb6e'/>
   </properties>
 </artifact>

XML way, #1

 <artifact classifier='osgi.bundle' id='org.eclipse.osgi' version='3.4.3.R34x_v20081215-1030'>
   <checksums>
     <checksum>
       <property name='algorithm' value='md5'/>
       <property name='artifact' value='58057045158895009b845b9a93f3eb6e'/>
       <property name='download' value='58057045158895009b845b9a93f3eb6e'/>
     </checksum>
   </checksums>
 </artifact>

XML way, #2

 <artifact classifier='osgi.bundle' id='org.eclipse.osgi' version='3.4.3.R34x_v20081215-1030'>
   <checksums>
     <checksum
       algorithm="md5"
       download="58057045158895009b845b9a93f3eb6e58057045158895009b845b9a93f3eb6e"
       artifact="58057045158895009b845b9a93f3eb6e58057045158895009b845b9a93f3eb6e"/>
   </checksums>
 </artifact>

XML way, #3

 <artifact classifier='osgi.bundle' id='org.eclipse.osgi' version='3.4.3.R34x_v20081215-1030'>
   <checksums>
     <checksum>
       <algorithm>sha256</algorithm>
       <download>58057045158895009b845b9a93f3eb6e58057045158895009b845b9a93f3eb6e</download>
       <artifact>58057045158895009b845b9a93f3eb6e58057045158895009b845b9a93f3eb6e</artifact>
     </checksum>
   </checksums>
 </artifact>

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