Minor refactoring of Fulcio SCT handling #1259
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Functionality should not change: Except a few more errors are handled. The sct module API changes but it is internal. * Remove one unnecessary internal exception and one unused exception * We only support a single SCT: simplify the sct module API * Make sure all errors raised in sct.get_signed_certificate_timestamp() are actually handled (by only raising ValueError and handling that) * Handle SCT parsing errors during verify Signed-off-by: Jussi Kukkonen <[email protected]>
Simplify FulcioCertificateSigningResponse by removing sct field from it. This changes the (internal) fulcio module API. The only place that needs the SCT is verify_sct() and it already gets the certificate which it can trivially get the SCT from. This makes get_signed_certificate_timestamp() an internal implementation detail of verify_sct() which is nice. FulcioSigningCert.post() changes in that it could now return a response without an SCT: this is ok as it is immediately verified in the callsite in Signer._signing_cert(). Signed-off-by: Jussi Kukkonen <[email protected]>
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Summary
Simplify SCT management in fulcio client and the sites that need to call verify_sct()
Fixes #1258
Leaving draft until I have another look myself.
Release Note
N/A: No public API changes or CLI changes are expected.