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Load auth settings.

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Max Goedjen 2022-02-24 22:09:07 -08:00
parent 53c8629870
commit e7e9f2b7f9
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GPG Key ID: E58C21DD77B9B8E8
1 changed files with 36 additions and 6 deletions
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42
Sources/Packages/Sources/SecureEnclaveSecretKit/SecureEnclaveStore.swift
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@ -183,7 +183,7 @@ extension SecureEnclave.Store {
/// Loads all secrets from the store.
private func loadSecrets() {
let attributes = [
let publicAttributes = [
kSecClass: kSecClassKey,
kSecAttrKeyType: SecureEnclave.Constants.keyType,
kSecAttrApplicationTag: SecureEnclave.Constants.keyTag,
@ -192,16 +192,46 @@ extension SecureEnclave.Store {
kSecMatchLimit: kSecMatchLimitAll,
kSecReturnAttributes: true
] as CFDictionary
var untyped: CFTypeRef?
SecItemCopyMatching(attributes, &untyped)
guard let typed = untyped as? [[CFString: Any]] else { return }
let wrapped: [SecureEnclave.Secret] = typed.map {
var publicUntyped: CFTypeRef?
SecItemCopyMatching(publicAttributes, &publicUntyped)
guard let publicTyped = publicUntyped as? [[CFString: Any]] else { return }
let privateAttributes = [
kSecClass: kSecClassKey,
kSecAttrKeyType: SecureEnclave.Constants.keyType,
kSecAttrApplicationTag: SecureEnclave.Constants.keyTag,
kSecAttrKeyClass: kSecAttrKeyClassPrivate,
kSecReturnRef: true,
kSecMatchLimit: kSecMatchLimitAll,
kSecReturnAttributes: true
] as CFDictionary
var privateUntyped: CFTypeRef?
SecItemCopyMatching(privateAttributes, &privateUntyped)
guard let privateTyped = privateUntyped as? [[CFString: Any]] else { return }
let privateMapped = privateTyped.reduce(into: [:] as [Data: [CFString: Any]]) { partialResult, next in
let id = next[kSecAttrApplicationLabel] as! Data
partialResult[id] = next
}
let authNotRequiredAccessControl: SecAccessControl =
SecAccessControlCreateWithFlags(kCFAllocatorDefault,
kSecAttrAccessibleWhenUnlockedThisDeviceOnly,
[.privateKeyUsage],
nil)!
let wrapped: [SecureEnclave.Secret] = publicTyped.map {
let name = $0[kSecAttrLabel] as? String ?? "Unnamed"
let id = $0[kSecAttrApplicationLabel] as! Data
let publicKeyRef = $0[kSecValueRef] as! SecKey
let publicKeyAttributes = SecKeyCopyAttributes(publicKeyRef) as! [CFString: Any]
let publicKey = publicKeyAttributes[kSecValueData] as! Data
return SecureEnclave.Secret(id: id, name: name, requiresAuthentication: false, publicKey: publicKey)
let privateKey = privateMapped[id]
let requiresAuth: Bool
if let authRequirements = privateKey?[kSecAttrAccessControl] {
// Unfortunately we can't inspect the access control object directly, but it does behave predicatable with equality.
requiresAuth = authRequirements as! SecAccessControl != authNotRequiredAccessControl
} else {
requiresAuth = false
}
return SecureEnclave.Secret(id: id, name: name, requiresAuthentication: requiresAuth, publicKey: publicKey)
}
secrets.append(contentsOf: wrapped)
}