AlgorithmLabelToAlgorithm converts the cose key alg label (string or int64) to a string algorithm name.

CNFCoseKey gets the cose key from the CNF field of CWT_Claims if it exists expected format is: /cnf/ 8 :{ /COSE_Key/ 1 :{ /kty/ 1 : /EC2/ 2, /crv/ -1 : /P-256/ 1, /x/ -2 : h'd7cc072de2205bdc1537a543d53c60a6acb62eccd890c7fa27c9 e354089bbe13', /y/ -3 : h'f95e1d4b851a2cc80fff87d8e23f22afb725d535e515d020731e 79a3b4e47120' } }.

CoseAlgForEC returns the appropraite algorithm for the provided public key curve or an error if the curve is not supported Noting that: "In order to promote interoperability, it is suggested that SHA-256 be used only with curve P-256, SHA-384 be used only with curve P-384, and SHA-512 be used with curve P-521." -- rfc 8152 & sec 4, 5480.

CurveLabelToCurve converts the cose key crv label (string or int64) to a string curve name.

KeyTypeLabelToKeyType converts the cose key type label (int64 or string) to a string keytype name.

MarshalCBOR marshals a cose_Sign1 message to cbor.

NewCNFClaim returns a CoseKey cnf claim formatted properly for the cose cwt claim label 13.

NewCoseCommonKey creates a new cose key with common fields.

NewCoseSign1Message creates a new cose sign1 message.

NewCoseSign1Message creates a new cose sign1 message from a cbor encoded message.

NewECCoseKey creates a new EC Cose Key.

NewRSACoseKey creates a new RSA cose key.

UnmarshalCBOR unmarshals a cbor encoded cose_Sign1 message.

Confirmation Method Label.

CoseKey as defined in: https://www.rfc-editor.org/rfc/rfc8152.html#page-33 COSE_Key = { 1 => tstr / int, ; kty ? 2 => bstr, ; kid ? 3 => tstr / int, ; alg ? 4 => [+ (tstr / nt) ], ; key_ops ? 5 => bstr, ; Base IV * label => values } Only with the common fields.

CoseSign1Message extends the cose.sign1message.

CWTClaims are the cwt claims found on the protected header of a signed SCITT statement: https://ietf-wg-scitt.github.io/draft-ietf-scitt-architecture/draft-ietf-scitt-architecture.html.

ECCoseKey is an EC2 cose key.

ErrKeyFormatError occurs when the key has unexpected format.

ErrKeyValueError occurs when the key has unexpected values.

ErrNoProtectedHeaderValue occurs when a cose protected header doesn't have a value for a given label.

ErrUnexpectedProtectedHeaderType occurs when a cose protected header label value doesn't have the expected value type.

RSACoseKey is an RSA cose key.

// CoseKey interface as defined in: https://www.rfc-editor.org/rfc/rfc8152.html#page-33 allows the retrieval of common properties as well as the public key half.