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fix(Auth): Add keychain logging for better debugging (#3669)
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* fix(Auth): Add keychain logging for better debugging

* Update AmplifyPlugins/Core/AWSPluginsCore/Keychain/KeychainStore.swift

Co-authored-by: Sebastian Villena <97059974+ruisebas@users.noreply.github.com>

* Update AmplifyPlugins/Core/AWSPluginsCore/Keychain/KeychainStore.swift

Co-authored-by: Sebastian Villena <97059974+ruisebas@users.noreply.github.com>

* Update AmplifyPlugins/Core/AWSPluginsCore/Keychain/KeychainStore.swift

Co-authored-by: Sebastian Villena <97059974+ruisebas@users.noreply.github.com>

---------

Co-authored by: Sebastian Villena <97059974+ruisebas@users.noreply.github.com>
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@harsh62
harsh62 committed May 2, 2024
1 parent 363b903 commit 95a53ab
Showing 1 changed file with 37 additions and 3 deletions.
40 changes: 37 additions & 3 deletions AmplifyPlugins/Core/AWSPluginsCore/Keychain/KeychainStore.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@

import Foundation
import Security
import Amplify

// swiftlint:disable identifier_name
public protocol KeychainStoreBehavior {
Expand Down Expand Up @@ -76,6 +77,7 @@ public struct KeychainStore: KeychainStoreBehavior {
var attributes = KeychainStoreAttributes(service: service)
attributes.accessGroup = accessGroup
self.init(attributes: attributes)
log.verbose("[KeychainStore] Initialized keychain with service=\(service), attributes=\(attributes), accessGroup=\(accessGroup ?? "")")
}

@_spi(KeychainStore)
Expand All @@ -84,12 +86,13 @@ public struct KeychainStore: KeychainStoreBehavior {
/// - Parameter key: A String key use to look up the value in the Keychain
/// - Returns: A string value
public func _getString(_ key: String) throws -> String {

log.verbose("[KeychainStore] Started retrieving `String` from the store with key=\(key)")
let data = try _getData(key)

guard let string = String(data: data, encoding: .utf8) else {
log.error("[KeychainStore] Unable to create String from Data retrieved")
throw KeychainStoreError.conversionError("Unable to create String from Data retrieved")
}
log.verbose("[KeychainStore] Successfully retrieved string from the store")
return string

}
Expand All @@ -100,6 +103,7 @@ public struct KeychainStore: KeychainStoreBehavior {
/// - Parameter key: A String key use to look up the value in the Keychain
/// - Returns: A data value
public func _getData(_ key: String) throws -> Data {
log.verbose("[KeychainStore] Started retrieving `Data` from the store with key=\(key)")
var query = attributes.defaultGetQuery()

query[Constants.MatchLimit] = Constants.MatchLimitOne
Expand All @@ -113,12 +117,16 @@ public struct KeychainStore: KeychainStoreBehavior {
switch status {
case errSecSuccess:
guard let data = result as? Data else {
log.error("[KeychainStore] The keychain item retrieved is not the correct type")
throw KeychainStoreError.unknown("The keychain item retrieved is not the correct type")
}
log.verbose("[KeychainStore] Successfully retrieved `Data` from the store with key=\(key)")
return data
case errSecItemNotFound:
log.verbose("[KeychainStore] No Keychain item found for key=\(key)")
throw KeychainStoreError.itemNotFound
default:
log.error("[KeychainStore] Error of status=\(status) occurred when attempting to retrieve a Keychain item for key=\(key)")
throw KeychainStoreError.securityError(status)
}
}
Expand All @@ -130,10 +138,13 @@ public struct KeychainStore: KeychainStoreBehavior {
/// - value: A string value to store in Keychain
/// - key: A String key for the value to store in the Keychain
public func _set(_ value: String, key: String) throws {
log.verbose("[KeychainStore] Started setting `String` for key=\(key)")
guard let data = value.data(using: .utf8, allowLossyConversion: false) else {
log.error("[KeychainStore] Unable to create Data from String retrieved for key=\(key)")
throw KeychainStoreError.conversionError("Unable to create Data from String retrieved")
}
try _set(data, key: key)
log.verbose("[KeychainStore] Successfully added `String` for key=\(key)")
}

@_spi(KeychainStore)
Expand All @@ -143,34 +154,43 @@ public struct KeychainStore: KeychainStoreBehavior {
/// - value: A data value to store in Keychain
/// - key: A String key for the value to store in the Keychain
public func _set(_ value: Data, key: String) throws {
log.verbose("[KeychainStore] Started setting `Data` for key=\(key)")
var getQuery = attributes.defaultGetQuery()
getQuery[Constants.AttributeAccount] = key

log.verbose("[KeychainStore] Initialized fetching to decide whether update or add")
let fetchStatus = SecItemCopyMatching(getQuery as CFDictionary, nil)
switch fetchStatus {
case errSecSuccess:
#if os(macOS)
log.verbose("[KeychainStore] Deleting item on MacOS to add an item.")
SecItemDelete(getQuery as CFDictionary)
fallthrough
#else
log.verbose("[KeychainStore] Found existing item, updating")
var attributesToUpdate = [String: Any]()
attributesToUpdate[Constants.ValueData] = value

let updateStatus = SecItemUpdate(getQuery as CFDictionary, attributesToUpdate as CFDictionary)
if updateStatus != errSecSuccess {
log.error("[KeychainStore] Error updating item to keychain with status=\(updateStatus)")
throw KeychainStoreError.securityError(updateStatus)
}
log.verbose("[KeychainStore] Successfully updated `String` in keychain for key=\(key)")
#endif
case errSecItemNotFound:
log.verbose("[KeychainStore] Unable to find an existing item, creating new item")
var attributesToSet = attributes.defaultSetQuery()
attributesToSet[Constants.AttributeAccount] = key
attributesToSet[Constants.ValueData] = value

let addStatus = SecItemAdd(attributesToSet as CFDictionary, nil)
if addStatus != errSecSuccess {
log.error("[KeychainStore] Error adding item to keychain with status=\(addStatus)")
throw KeychainStoreError.securityError(addStatus)
}
log.verbose("[KeychainStore] Successfully added `String` in keychain for key=\(key)")
default:
log.error("[KeychainStore] Error occurred while retrieving data from keychain when deciding to update or add with status=\(fetchStatus)")
throw KeychainStoreError.securityError(fetchStatus)
}
}
Expand All @@ -180,28 +200,34 @@ public struct KeychainStore: KeychainStoreBehavior {
/// This System Programming Interface (SPI) may have breaking changes in future updates.
/// - Parameter key: A String key to delete the key-value pair
public func _remove(_ key: String) throws {
log.verbose("[KeychainStore] Starting to remove item from keychain with key=\(key)")
var query = attributes.defaultGetQuery()
query[Constants.AttributeAccount] = key

let status = SecItemDelete(query as CFDictionary)
if status != errSecSuccess && status != errSecItemNotFound {
log.error("[KeychainStore] Error removing itms from keychain with status=\(status)")
throw KeychainStoreError.securityError(status)
}
log.verbose("[KeychainStore] Successfully removed item from keychain")
}

@_spi(KeychainStore)
/// Removes all key-value pair in the Keychain.
/// This System Programming Interface (SPI) may have breaking changes in future updates.
public func _removeAll() throws {
log.verbose("[KeychainStore] Starting to remove all items from keychain")
var query = attributes.defaultGetQuery()
#if !os(iOS) && !os(watchOS) && !os(tvOS)
query[Constants.MatchLimit] = Constants.MatchLimitAll
#endif

let status = SecItemDelete(query as CFDictionary)
if status != errSecSuccess && status != errSecItemNotFound {
log.error("[KeychainStore] Error removing all items from keychain with status=\(status)")
throw KeychainStoreError.securityError(status)
}
log.verbose("[KeychainStore] Successfully removed all items from keychain")
}

}
Expand Down Expand Up @@ -241,3 +267,11 @@ extension KeychainStore {
}
}
// swiftlint:enable identifier_name

extension KeychainStore: DefaultLogger {
public static var log: Logger {
Amplify.Logging.logger(forNamespace: String(describing: self))
}

public nonisolated var log: Logger { Self.log }
}

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