问题描述

我想知道是否有办法重置我的应用的钥匙串.我想知道钥匙串是否存在类似 [NSUserDefaults resetStandardUserDefaults] 的东西.即使删除应用程序后，钥匙串也不会重置.到目前为止，我知道的唯一方法是从应用程序中一一重置它们.

I would like to know if there is a way to reset my app's Keychain. I am wondering whether anything like [NSUserDefaults resetStandardUserDefaults] exists for keychain. Keychain is not reset even after the app is deleted. So far the only way I know is to reset them one by one from the app.

推荐答案

由于到目前为止所有的答案都依赖于您知道要删除的标识符，我想提交以下解决方案，删除所有现有的应用键(仅限 iOS)

As all of the answers so far rely on you knowing the identifiers you want to delete, I would like to submit the following solution that deletes ALL existing keys for the app (iOS only)

目标-C:

-(void)resetKeychain {
    [self deleteAllKeysForSecClass:kSecClassGenericPassword];
    [self deleteAllKeysForSecClass:kSecClassInternetPassword];
    [self deleteAllKeysForSecClass:kSecClassCertificate];
    [self deleteAllKeysForSecClass:kSecClassKey];
    [self deleteAllKeysForSecClass:kSecClassIdentity];
}

-(void)deleteAllKeysForSecClass:(CFTypeRef)secClass {
    NSMutableDictionary* dict = [NSMutableDictionary dictionary];
    [dict setObject:(__bridge id)secClass forKey:(__bridge id)kSecClass];
    OSStatus result = SecItemDelete((__bridge CFDictionaryRef) dict);
    NSAssert(result == noErr || result == errSecItemNotFound, @"Error deleting keychain data (%ld)", result);
}

Swift 2.2:

func resetKeychain() {
    self.deleteAllKeysForSecClass(kSecClassGenericPassword)
    self.deleteAllKeysForSecClass(kSecClassInternetPassword)
    self.deleteAllKeysForSecClass(kSecClassCertificate)
    self.deleteAllKeysForSecClass(kSecClassKey)
    self.deleteAllKeysForSecClass(kSecClassIdentity)
}

func deleteAllKeysForSecClass(secClass: CFTypeRef) {
    let dict: [NSString : AnyObject] = [kSecClass : secClass]
    let result = SecItemDelete(dict)
    assert(result == noErr || result == errSecItemNotFound, "Error deleting keychain data ((result))")
}

斯威夫特 3:

func resetKeychain() {
    deleteAllKeysForSecClass(kSecClassGenericPassword)
    deleteAllKeysForSecClass(kSecClassInternetPassword)
    deleteAllKeysForSecClass(kSecClassCertificate)
    deleteAllKeysForSecClass(kSecClassKey)
    deleteAllKeysForSecClass(kSecClassIdentity)
}

func deleteAllKeysForSecClass(_ secClass: CFTypeRef) {
    let dict: [NSString : Any] = [kSecClass : secClass]
    let result = SecItemDelete(dict as CFDictionary)
    assert(result == noErr || result == errSecItemNotFound, "Error deleting keychain data ((result))")
}

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