84 lines
3.7 KiB
Swift
84 lines
3.7 KiB
Swift
import Foundation
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import Security
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import os.log
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/// Authentication shared with the containing app through the Keychain access group.
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/// The extension accesses the bearer token and pinned certificate fingerprint stored by the app.
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enum PortalAuth {
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static let suite = "ENT9X9U544.com.kovtash.portalcam"
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static let accessGroup = "ENT9X9U544.com.kovtash.portalcam"
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static let service = "com.kovtash.portalcam.auth"
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static let tokenKey = "portalAuthToken"
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static let certKey = "portalPinnedCertSha256"
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static var token: String? {
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return readItem(account: tokenKey)
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}
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static var pinnedCertSha256: String? {
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return readItem(account: certKey)
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}
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private static func readItem(account: String) -> String? {
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// 1. Try modern Data Protection Keychain with explicit access group
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let dpQuery: [String: Any] = [
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kSecClass as String: kSecClassGenericPassword,
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kSecAttrService as String: service,
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kSecAttrAccount as String: account,
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kSecAttrAccessGroup as String: accessGroup,
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kSecReturnData as String: true,
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kSecMatchLimit as String: kSecMatchLimitOne,
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kSecUseDataProtectionKeychain as String: true
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]
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var item: CFTypeRef?
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let dpStatus = SecItemCopyMatching(dpQuery as CFDictionary, &item)
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if dpStatus == errSecSuccess, let data = item as? Data,
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let value = String(data: data, encoding: .utf8) {
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os_log(.default, "PortalCam extension: %{public}@ found in DP Keychain with access group", account)
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return value
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}
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// 2. Try Data Protection Keychain without explicit access group (matches all groups in entitlement)
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let defaultGroupQuery: [String: Any] = [
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kSecClass as String: kSecClassGenericPassword,
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kSecAttrService as String: service,
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kSecAttrAccount as String: account,
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kSecReturnData as String: true,
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kSecMatchLimit as String: kSecMatchLimitOne,
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kSecUseDataProtectionKeychain as String: true
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]
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var defaultItem: CFTypeRef?
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let defaultStatus = SecItemCopyMatching(defaultGroupQuery as CFDictionary, &defaultItem)
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if defaultStatus == errSecSuccess, let data = defaultItem as? Data,
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let value = String(data: data, encoding: .utf8) {
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os_log(.default, "PortalCam extension: %{public}@ found in DP Keychain default group", account)
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return value
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}
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// 3. Try legacy file-based keychain
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let legacyQuery: [String: Any] = [
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kSecClass as String: kSecClassGenericPassword,
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kSecAttrService as String: service,
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kSecAttrAccount as String: account,
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kSecReturnData as String: true,
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kSecMatchLimit as String: kSecMatchLimitOne
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]
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var legacyItem: CFTypeRef?
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let legacyStatus = SecItemCopyMatching(legacyQuery as CFDictionary, &legacyItem)
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if legacyStatus == errSecSuccess, let data = legacyItem as? Data,
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let value = String(data: data, encoding: .utf8) {
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os_log(.default, "PortalCam extension: %{public}@ found in Legacy Keychain", account)
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return value
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}
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// 4. Compatibility fallback: App Group UserDefaults
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if let value = UserDefaults(suiteName: suite)?.string(forKey: account) {
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os_log(.default, "PortalCam extension: %{public}@ found in App Group fallback", account)
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return value
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}
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os_log(.default, "PortalCam extension: %{public}@ unavailable (DP status: %{public}d, default status: %{public}d, legacy status: %{public}d)", account, dpStatus, defaultStatus, legacyStatus)
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return nil
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}
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}
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