JankariTechUG/GitTrustedTimestamps
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Corrected outdated information in documentation.

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Matthias Bühlmann
2021-03-10 20:34:52 +01:00
parent 3d69cc41f0
commit 67f7e18b62
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@@ -90,7 +90,7 @@ Additionally to retrieving TSA tokens and timestamping the commits with them, th
If a token does not pass these tests, it is not added and the commit is either aborted (if the TSA is not set to optional) or a warning is output (if the TSA is set to optional).
This repository uses the post-commit hook itself, so if you check the commit history of this repository, you will see that each commit is followed by a -----TIMESTAMP COMMIT----- that contains one or more timestamp tokens.
For example, [this](https://github.com/MrMabulous/GitTrustedTimestamps/commit/58ba3dbd480e3c07dbd14beca02092982f8e9492) *timestamp commit* timestamps [this](https://github.com/MrMabulous/GitTrustedTimestamps/commit/80034aeb7857a910f06429c3580635b4afa40cc0) regular commit, which is its direct parent. You can see that the "Digest" that is timestamped by the token is `bf8d5c510b87e22c06f3300e5dbe69f5c6a3f1e1=sha1(parent:6e9841d157c222e9bd79d6580dd029adccf55cde,tree:75be5fcd56edaff4da1fc31d3632da14618f7fc0)`, whereas the tree hash and parent hash in the preimage correspond to the parent and tree of this *timestamp commit*.
For example, [this](https://github.com/MrMabulous/GitTrustedTimestamps/commit/58ba3dbd480e3c07dbd14beca02092982f8e9492) *timestamp commit* timestamps [this](https://github.com/MrMabulous/GitTrustedTimestamps/commit/80034aeb7857a910f06429c3580635b4afa40cc0) regular commit, which is its direct parent. You can see that the "Digest" that is timestamped by the token is `d8f311290fb12fbd87c50014b75809150d125272=sha1(version:1,parent:80034aeb7857a910f06429c3580635b4afa40cc0,tree:50c7905ec6a07547e5bdeab38a810c2dc1c5ae44)`, whereas the tree hash and parent hash in the preimage correspond to the parent and tree of this *timestamp commit*.
Since github did not support sha256 hashes yet at the time this repository was created, the hashing algorithm used is sha1 (for a repository initialized with `git init --object-format=sha256` the hashing algorithm will be sha256 or other, once git adds support for further algorithms)
# For how long are timestamps valid?