feat: add passkey creation functionality

pkg/common/passkeys/codec.go

@@ -0,0 +1,47 @@
+package passkeys
+
+import (
+	"github.com/go-webauthn/webauthn/protocol"
+	"github.com/go-webauthn/webauthn/protocol/webauthncose"
+)
+
+func defaultPrimaryAttestationFormats() []protocol.AttestationFormat {
+	return []protocol.AttestationFormat{
+		protocol.AttestationFormatApple,
+		protocol.AttestationFormatAndroidKey,
+		protocol.AttestationFormatAndroidSafetyNet,
+		protocol.AttestationFormatFIDOUniversalSecondFactor,
+	}
+}
+
+func defaultSecondaryAttestationFormats() []protocol.AttestationFormat {
+	return []protocol.AttestationFormat{
+		protocol.AttestationFormatPacked,
+		protocol.AttestationFormatTPM,
+	}
+}
+
+func defaultAuthenticatorSelection() protocol.AuthenticatorSelection {
+	return protocol.AuthenticatorSelection{
+		AuthenticatorAttachment: protocol.Platform,
+		ResidentKey:             protocol.ResidentKeyRequirementRequired,
+		UserVerification:        protocol.VerificationRequired,
+	}
+}
+
+func buildCredentialParameters() []protocol.CredentialParameter {
+	return []protocol.CredentialParameter{
+		{
+			Type:      "public-key",
+			Algorithm: webauthncose.AlgES256,
+		},
+		{
+			Type:      "public-key",
+			Algorithm: webauthncose.AlgES256K,
+		},
+		{
+			Type:      "public-key",
+			Algorithm: webauthncose.AlgEdDSA,
+		},
+	}
+}