hpke: Enforces passing a slice of exact size to UnmarshalBinary for KEM keys#489

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armfazh wants to merge 2 commits intocloudflare:mainfrom armfazh:fix_hpke_ser

+81-14

Commits on Apr 26, 2024

Test showing Issue cloudflare#488 , unmarshal keys panics.
armfazh
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Enforces passing slices of the exact size when unmarshaling KEM keys.
armfazh
committed