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[Core] Update method migration #1206

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Nov 1, 2023
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34 changes: 30 additions & 4 deletions Sources/WalletConnectKMS/Keychain/KeychainStorage.swift
Original file line number Diff line number Diff line change
Expand Up @@ -55,7 +55,7 @@ public final class KeychainStorage: KeychainStorageProtocol {
case errSecSuccess:
return item as? Data
case errSecItemNotFound:
return tryMigrateAttrAccessible(key: key) // TODO: Replace with nil once migration period ends
return tryMigrateAttrAccessibleOnRead(key: key) // TODO: Replace with nil once migration period ends
default:
throw KeychainError(status)
}
Expand All @@ -70,8 +70,13 @@ public final class KeychainStorage: KeychainStorageProtocol {
let attributes = [kSecValueData: data]

let status = secItem.update(query as CFDictionary, attributes as CFDictionary)

guard status == errSecSuccess else {

switch status {
case errSecSuccess:
return
case errSecItemNotFound:
try tryMigrateAttrAccessibleOnUpdate(data: data, key: key) // TODO: Remove once migration period ends
default:
throw KeychainError(status)
}
}
Expand Down Expand Up @@ -108,7 +113,7 @@ public final class KeychainStorage: KeychainStorageProtocol {
]
}

private func tryMigrateAttrAccessible(key: String) -> Data? {
private func tryMigrateAttrAccessibleOnRead(key: String) -> Data? {
var updateQuery = buildBaseServiceQuery(for: key)
updateQuery[kSecAttrAccessible] = kSecAttrAccessibleWhenUnlockedThisDeviceOnly

Expand All @@ -127,4 +132,25 @@ public final class KeychainStorage: KeychainStorageProtocol {

return item as? Data
}

private func tryMigrateAttrAccessibleOnUpdate(data: Data, key: String) throws {
var updateAccessQuery = buildBaseServiceQuery(for: key)
updateAccessQuery[kSecAttrAccessible] = kSecAttrAccessibleWhenUnlockedThisDeviceOnly

let accessAttributes = [kSecAttrAccessible: kSecAttrAccessibleAfterFirstUnlockThisDeviceOnly]
let accessStatus = secItem.update(updateAccessQuery as CFDictionary, accessAttributes as CFDictionary)

guard accessStatus == errSecSuccess else {
throw KeychainError.itemNotFound
}

let updateQuery = buildBaseServiceQuery(for: key)
let updateAttributes = [kSecValueData: data]

let updateStatus = secItem.update(updateQuery as CFDictionary, updateAttributes as CFDictionary)

guard updateStatus == errSecSuccess else {
throw KeychainError.itemNotFound
}
}
}