feat: credential struct tags for json serialization (#197)

Fixes #193.

webauthn/authenticator.go

@@ -7,22 +7,22 @@ import (
 type Authenticator struct {
 	// The AAGUID of the authenticator. An AAGUID is defined as an array containing the globally unique
 	// identifier of the authenticator model being sought.
-	AAGUID []byte
+	AAGUID []byte `json:"AAGUID"`
 
 	// SignCount -Upon a new login operation, the Relying Party compares the stored signature counter value
 	// with the new signCount value returned in the assertion’s authenticator data. If this new
 	// signCount value is less than or equal to the stored value, a cloned authenticator may
 	// exist, or the authenticator may be malfunctioning.
-	SignCount uint32
+	SignCount uint32 `json:"signCount"`
 
 	// CloneWarning - This is a signal that the authenticator may be cloned, i.e. at least two copies of the
 	// credential private key may exist and are being used in parallel. Relying Parties should incorporate
 	// this information into their risk scoring. Whether the Relying Party updates the stored signature
 	// counter value in this case, or not, or fails the authentication ceremony or not, is Relying Party-specific.
-	CloneWarning bool
+	CloneWarning bool `json:"cloneWarning"`
 
 	// Attachment is the authenticatorAttachment value returned by the request.
-	Attachment protocol.AuthenticatorAttachment
+	Attachment protocol.AuthenticatorAttachment `json:"attachment"`
 }
 
 // SelectAuthenticator allow for easy marshaling of authenticator options that are provided to the user.

webauthn/credential.go

@@ -7,40 +7,40 @@ import (
 // Credential contains all needed information about a WebAuthn credential for storage.
 type Credential struct {
 	// A probabilistically-unique byte sequence identifying a public key credential source and its authentication assertions.
-	ID []byte
+	ID []byte `json:"id"`
 
 	// The public key portion of a Relying Party-specific credential key pair, generated by an authenticator and returned to
 	// a Relying Party at registration time (see also public key credential). The private key portion of the credential key
 	// pair is known as the credential private key. Note that in the case of self attestation, the credential key pair is also
 	// used as the attestation key pair, see self attestation for details.
-	PublicKey []byte
+	PublicKey []byte `json:"publicKey"`
 
 	// The attestation format used (if any) by the authenticator when creating the credential.
-	AttestationType string
+	AttestationType string `json:"attestationType"`
 
 	// The transport types the authenticator supports.
-	Transport []protocol.AuthenticatorTransport
+	Transport []protocol.AuthenticatorTransport `json:"transport"`
 
 	// The commonly stored flags.
-	Flags CredentialFlags
+	Flags CredentialFlags `json:"flags"`
 
 	// The Authenticator information for a given certificate.
-	Authenticator Authenticator
+	Authenticator Authenticator `json:"authenticator"`
 }
 
 type CredentialFlags struct {
 	// Flag UP indicates the users presence.
-	UserPresent bool
+	UserPresent bool `json:"userPresent"`
 
 	// Flag UV indicates the user performed verification.
-	UserVerified bool
+	UserVerified bool `json:"userVerified"`
 
 	// Flag BE indicates the credential is able to be backed up and/or sync'd between devices. This should NEVER change.
-	BackupEligible bool
+	BackupEligible bool `json:"backupEligible"`
 
 	// Flag BS indicates the credential has been backed up and/or sync'd. This value can change but it's recommended
 	// that RP's keep track of this value.
-	BackupState bool
+	BackupState bool `json:"backupState"`
 }
 
 // Descriptor converts a Credential into a protocol.CredentialDescriptor.