COSE Algorithms

COSE Curves

COSE Keys

COSE Key Types

Convert the aaguid buffer in authData into a UUID string

Convert buffer to an OpenSSL-compatible PEM text format.

Takes COSE-encoded public key and converts it to PKCS key

Convert an AttestationObject buffer to a proper object

Decode an authenticator's base64url-encoded clientDataJSON to JSON

Generate a suitably random value to be used as an attestation or assertion challenge

Extract PEM certificate info

A method to pull a CRL from a certificate and compare its serial number to the list of revoked certificate serial numbers within the CRL.

Encode the given array buffer into a Base64URL-encoded string. Ideal for converting various credential response ArrayBuffers to string for sending back to the server as JSON.

Encode a string to base64url

Confirm that the string is encoded into base64

Confirm that the string is encoded into base64url, with support for optional padding

Convert a base64url string into base64

Decode from a Base64URL-encoded string to an ArrayBuffer. Best used when converting a credential ID from a JSON string to an ArrayBuffer, like in allowCredentials or excludeCredentials.

Decode a base64url string into its original string

Decode and return the first item in a sequence of CBOR-encoded values

Encode data to CBOR

Generate a digest of the provided data.

Fill up the provided bytes array with random bytes equal to its length.

Verify signatures with their public key. Supports EC2 and RSA public keys.

Make sure two Uint8Arrays are deeply equivalent

Combine multiple Uint8Arrays into a single Uint8Array

Convert an ASCII string to Uint8Array

Convert a hexadecimal string to isoUint8Array.

Convert a UTF-8 string back into bytes

Prepare a DataView we can slice our way around in as we parse the bytes in a Uint8Array

Convert a Uint8Array to Hexadecimal.

Convert bytes into a UTF-8 string

Make sense of the authData buffer contained in an Attestation

Returns hash digest of the given data, using the given algorithm when provided. Defaults to using SHA-256.

Traverse an array of PEM certificates and ensure they form a proper chain

Verify an authenticator's signature

AttestationStatement will be an instance of Map, but these keys help make finite the list of possible values within it.

Fundamental values that are needed to discern the more specific COSE public key types below.

Fundamental values that are needed to discern the more specific COSE public key types below.