Make COSE deserialization more robust #2
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Previously, COSE keys could only be deserialized if the map entries were in the correct order. With this patch, the deserialization is made more robust (and also more concise) by introducing a helper struct, RawPublicKey, that is used as an intermediate step during the deserialization. Fixes: trussed-dev#7
The algorithm field is optional, see RFC 8152 § 7:
COSE_Key = {
1 => tstr / int, ; kty
? 2 => bstr, ; kid
? 3 => tstr / int, ; alg
? 4 => [+ (tstr / int) ], ; key_ops
? 5 => bstr, ; Base IV
* label => values
}
alg: This parameter is used to restrict the algorithm that is used
with the key. If this parameter is present in the key structure,
the application MUST verify that this algorithm matches the
algorithm for which the key is being used.
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Merging as approved in trussed-dev#8. |
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Previously, COSE keys could only be deserialized if the map entries were in the correct order. With this patch, the deserialization is made more robust (and also more concise) by introducing a helper struct, RawPublicKey, that is used as an intermediate step during the deserialization.
Fixes: trussed-dev#7
Upstream PR: trussed-dev#8