27 lines
773 B
Swift
27 lines
773 B
Swift
import CryptoKit
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import Foundation
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import LocalData
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nonisolated
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struct ExternalKeyMaterialProvider: KeyMaterialProviding {
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private enum Constants {
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static let keyLength = 32
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}
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func keyMaterial(for keyName: String) async throws -> Data {
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let key = StorageKeys.ExternalKeyMaterialKey()
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if let existing = try await StorageRouter.shared.get(key) as Data? {
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return existing
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}
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let symmetricKey = SymmetricKey(size: .bits256)
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let material = symmetricKey.withUnsafeBytes { Data($0) }
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guard material.count == Constants.keyLength else {
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throw StorageError.securityApplicationFailed
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}
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try await StorageRouter.shared.set(material, for: key)
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return material
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}
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}
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