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package webauthncbor
import "github.com/fxamacker/cbor/v2"
const nestedLevelsAllowed = 4
// ctap2CBORDecMode is the cbor.DecMode following the CTAP2 canonical CBOR encoding form
// (https://fidoalliance.org/specs/fido-v2.0-ps-20190130/fido-client-to-authenticator-protocol-v2.0-ps-20190130.html#message-encoding)
var ctap2CBORDecMode, _ = cbor.DecOptions{
DupMapKey: cbor.DupMapKeyEnforcedAPF,
MaxNestedLevels: nestedLevelsAllowed,
IndefLength: cbor.IndefLengthForbidden,
TagsMd: cbor.TagsForbidden,
}.DecMode()
var ctap2CBOREncMode, _ = cbor.CTAP2EncOptions().EncMode()
// Unmarshal parses the CBOR-encoded data into the value pointed to by v
// following the CTAP2 canonical CBOR encoding form.
// (https://fidoalliance.org/specs/fido-v2.0-ps-20190130/fido-client-to-authenticator-protocol-v2.0-ps-20190130.html#message-encoding)
func Unmarshal(data []byte, v interface{}) error {
// TODO (james-d-elliott): investigate the specific use case for Unmarshal vs UnmarshalFirst to determine the edge cases where this may be useful.
_, err := ctap2CBORDecMode.UnmarshalFirst(data, v)
return err
}
// Marshal encodes the value pointed to by v
// following the CTAP2 canonical CBOR encoding form.
// (https://fidoalliance.org/specs/fido-v2.0-ps-20190130/fido-client-to-authenticator-protocol-v2.0-ps-20190130.html#message-encoding)
func Marshal(v interface{}) ([]byte, error) {
return ctap2CBOREncMode.Marshal(v)
}
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