0.10.6

Sources/Shared/Security/CredentialVault.swift

@@ -0,0 +1,85 @@
+import Foundation
+import Security
+
+final class CredentialVault {
+    private let service = "app.luma.chat.xmpp"
+
+    func save(password: String, for jid: String) throws {
+        let account = jid.lowercased()
+        let passwordData = Data(password.utf8)
+        let baseQuery: [CFString: Any] = [
+            kSecClass: kSecClassGenericPassword,
+            kSecAttrService: service,
+            kSecAttrAccount: account
+        ]
+
+        let updateStatus = SecItemUpdate(
+            baseQuery as CFDictionary,
+            [kSecValueData: passwordData] as CFDictionary
+        )
+
+        if updateStatus == errSecSuccess {
+            return
+        }
+        guard updateStatus == errSecItemNotFound else {
+            throw CredentialVaultError.unhandled(updateStatus)
+        }
+
+        var insertion = baseQuery
+        insertion[kSecValueData] = passwordData
+#if !os(macOS)
+        insertion[kSecAttrAccessible] = kSecAttrAccessibleAfterFirstUnlockThisDeviceOnly
+#endif
+        let addStatus = SecItemAdd(insertion as CFDictionary, nil)
+        guard addStatus == errSecSuccess else {
+            throw CredentialVaultError.unhandled(addStatus)
+        }
+    }
+
+    func password(for jid: String) throws -> String? {
+        let query: [CFString: Any] = [
+            kSecClass: kSecClassGenericPassword,
+            kSecAttrService: service,
+            kSecAttrAccount: jid.lowercased(),
+            kSecReturnData: true,
+            kSecMatchLimit: kSecMatchLimitOne
+        ]
+
+        var item: CFTypeRef?
+        let status = SecItemCopyMatching(query as CFDictionary, &item)
+        if status == errSecItemNotFound {
+            return nil
+        }
+        guard status == errSecSuccess,
+              let data = item as? Data,
+              let value = String(data: data, encoding: .utf8) else {
+            throw CredentialVaultError.unhandled(status)
+        }
+        return value
+    }
+
+    func deletePassword(for jid: String) throws {
+        let query: [CFString: Any] = [
+            kSecClass: kSecClassGenericPassword,
+            kSecAttrService: service,
+            kSecAttrAccount: jid.lowercased()
+        ]
+        let status = SecItemDelete(query as CFDictionary)
+        guard status == errSecSuccess || status == errSecItemNotFound else {
+            throw CredentialVaultError.unhandled(status)
+        }
+    }
+}
+
+enum CredentialVaultError: LocalizedError {
+    case unhandled(OSStatus)
+
+    var errorDescription: String? {
+        switch self {
+        case .unhandled(let status):
+            let message = SecCopyErrorMessageString(status, nil) as String?
+            return message ?? "Не удалось обратиться к Keychain (\(status))."
+        }
+    }
+}
+