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Code Issues Releases Wiki Activity

Add Keychain-related errors and throw from Keychain extension

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This commit is contained in:
Angelo Stavrow 2021-08-20 17:13:01 -04:00
parent 18e69277a0
commit 2d965772e7
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GPG Key ID: 1A49C7064E060EEE
1 changed files with 13 additions and 5 deletions
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18
Shared/Extensions/WriteFreelyModel+Keychain.swift
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@ -1,7 +1,14 @@
import Foundation import Foundation
extension WriteFreelyModel { extension WriteFreelyModel {
func saveTokenToKeychain(_ token: String, username: String?, server: String) {
enum WFKeychainError: Error {
case saveToKeychainFailed
case purgeFromKeychainFailed
case fetchFromKeychainFailed
}
func saveTokenToKeychain(_ token: String, username: String?, server: String) throws {
let query: [String: Any] = [ let query: [String: Any] = [
kSecClass as String: kSecClassGenericPassword, kSecClass as String: kSecClassGenericPassword,
kSecValueData as String: token.data(using: .utf8)!, kSecValueData as String: token.data(using: .utf8)!,
@ -10,7 +17,7 @@ extension WriteFreelyModel {
] ]
let status = SecItemAdd(query as CFDictionary, nil) let status = SecItemAdd(query as CFDictionary, nil)
guard status == errSecDuplicateItem || status == errSecSuccess else { guard status == errSecDuplicateItem || status == errSecSuccess else {
fatalError("Error storing in Keychain with OSStatus: \(status)") throw WFKeychainError.saveToKeychainFailed
} }
} }
@ -22,11 +29,11 @@ extension WriteFreelyModel {
] ]
let status = SecItemDelete(query as CFDictionary) let status = SecItemDelete(query as CFDictionary)
guard status == errSecSuccess || status == errSecItemNotFound else { guard status == errSecSuccess || status == errSecItemNotFound else {
fatalError("Error deleting from Keychain with OSStatus: \(status)") throw WFKeychainError.purgeFromKeychainFailed
} }
} }
func fetchTokenFromKeychain(username: String?, server: String) -> String? { func fetchTokenFromKeychain(username: String?, server: String) throws -> String? {
let query: [String: Any] = [ let query: [String: Any] = [
kSecClass as String: kSecClassGenericPassword, kSecClass as String: kSecClassGenericPassword,
kSecAttrAccount as String: username ?? "anonymous", kSecAttrAccount as String: username ?? "anonymous",
@ -41,7 +48,7 @@ extension WriteFreelyModel {
return nil return nil
} }
guard status == errSecSuccess else { guard status == errSecSuccess else {
fatalError("Error fetching from Keychain with OSStatus: \(status)") throw WFKeychainError.fetchFromKeychainFailed
} }
guard let existingSecItem = secItem as? [String: Any], guard let existingSecItem = secItem as? [String: Any],
let tokenData = existingSecItem[kSecValueData as String] as? Data, let tokenData = existingSecItem[kSecValueData as String] as? Data,
@ -50,4 +57,5 @@ extension WriteFreelyModel {
} }
return token return token
} }
} }