crypto/x509: add String() for KeyUsage, ExtKeyUsage

[izolight]

Some fields of x509.Certificate, like SignatureAlgorithm or PublicKeyAlgorightm already have a String() method. This proposal adds them to the KeyUsage and ExtKeyUsage types, which is mainly useful when printing/logging the certificate.

[gopherbot]

Change https://go.dev/cl/437875 mentions this issue: crypto/x509: add String() for KeyUsage, ExtKeyUsage

[rsc]

/cc @rolandshoemaker @golang/security

[rsc]

This proposal has been added to the active column of the proposals project
and will now be reviewed at the weekly proposal review meetings.
— rsc for the proposal review group

[rolandshoemaker]

No objection, seems like a reasonable addition.

[rsc]

Based on the discussion above, this proposal seems like a likely accept.
— rsc for the proposal review group

[rsc]

No change in consensus, so accepted. 🎉
This issue now tracks the work of implementing the proposal.
— rsc for the proposal review group

[gopherbot]

Change https://go.dev/cl/571035 mentions this issue: crypto/x509: generate String methods for {KeyUsage, ExtKeyUsage}