auth: publish passkey foundations preview

third_party/go-webauthn/webauthn/util.go

@@ -0,0 +1,40 @@
+package webauthn
+
+import "bytes"
+
+func isByteArrayInSlice(needle []byte, haystack ...[]byte) (valid bool) {
+	for _, hay := range haystack {
+		if bytes.Equal(needle, hay) {
+			return true
+		}
+	}
+
+	return false
+}
+
+func isCredentialsAllowedMatchingOwned(allowedCredentialIDs [][]byte, credentials []Credential) (valid bool) {
+	var credential Credential
+
+allowed:
+	for _, allowedCredentialID := range allowedCredentialIDs {
+		for _, credential = range credentials {
+			if bytes.Equal(credential.ID, allowedCredentialID) {
+				continue allowed
+			}
+		}
+
+		return false
+	}
+
+	return true
+}
+
+func isCredentialIDInCredentials(credentialID []byte, credentials []Credential) (valid bool) {
+	for _, credential := range credentials {
+		if bytes.Equal(credential.ID, credentialID) {
+			return true
+		}
+	}
+
+	return false
+}