- (NSMutableDictionary *)newSearchDictionary:(NSString *)identifier {
    NSMutableDictionary *searchDictionary = [[NSMutableDictionary alloc] init];

    [searchDictionary setObject:(__bridge id)kSecClassGenericPassword forKey:(__bridge id)kSecClass];

    NSData *encodedIdentifier = [identifier dataUsingEncoding:NSUTF8StringEncoding];
    [searchDictionary setObject:encodedIdentifier forKey:(__bridge id)kSecAttrGeneric];
    [searchDictionary setObject:encodedIdentifier forKey:(__bridge id)kSecAttrAccount];
    [searchDictionary setObject:serviceName forKey:(__bridge id)kSecAttrService];

    return searchDictionary;
}

- (NSData *)searchKeychainCopyMatching:(NSString *)identifier {
    NSMutableDictionary *searchDictionary = [self newSearchDictionary:identifier];

    [searchDictionary setObject:(__bridge id)kSecMatchLimitOne forKey:(__bridge id)kSecMatchLimit];
    [searchDictionary setObject:(id)kcfBooleanTrue forKey:(__bridge id)kSecReturnData];

    CFDataRef dataRef;
    OSStatus status = SecItemCopyMatching((__bridge CFDictionaryRef)searchDictionary,(CFTypeRef *)&dataRef);

    if (status != errSecSuccess) {
#ifdef DEBUG
        NSLog(@"%s - No OSStatus errSecSuccess. Caused by SecItemCopyMatching",__PRETTY_FUNCTION__);
#endif
        return nil;
    }
    NSData *result = (__bridge_transfer NSData *)dataRef;
    return result;
}

当应用程序启动时 – (NSData *)searchKeychainCopyMatching：(NSString *)标识符函数从keychain加载值.一切都运行良好一段时间.但在大约15次成功的价值请求后,我收到了一个错误.

OSStatus代码-34018

SecItemCopyMatching函数返回该错误代码.文件说

@result一个结果代码.请参阅“安全错误代码”(SecBase.h).

但是在SecBase.h中查看只指定了这些OSStatus代码.

enum
{
    errSecSuccess                               = 0,/* No error. */
    errSecUnimplemented                         = -4,/* Function or operation not implemented. */
    errSecIO                                    = -36,/*I/O error (bummers)*/
    errSecOpWr                                  = -49,/*file already open with with write permission*/
    errSecParam                                 = -50,/* One or more parameters passed to a function where not valid. */
    errSecAllocate                              = -108,/* Failed to allocate memory. */
    errSecUserCanceled                          = -128,/* User canceled the operation. */
    errSecBadReq                                = -909,/* Bad parameter or invalid state for operation. */
    errSecInternalComponent                     = -2070,errSecNotAvailable                          = -25291,/* No keychain is available. You may need to restart your computer. */
    errSecDuplicateItem                         = -25299,/* The specified item already exists in the keychain. */
    errSecItemNotFound                          = -25300,/* The specified item could not be found in the keychain. */
    errSecInteractionNotAllowed                 = -25308,/* User interaction is not allowed. */
    errSecDecode                                = -26275,/* Unable to decode the provided data. */
    errSecAuthFailed                            = -25293,/* The user name or passphrase you entered is not correct. */
};

已经检查过的值不会被覆盖.

最后但并非最不重要的搜索词典：

编辑 – 新信息

我整天都在调试,我发现了一些消息.我正在下载包含可执行Bundle的Zip文件.这是一个内部应用程序,因此不必担心审查指南中的第2.7和2.8点.成功加载捆绑包后,将显示权利错误.

NSBundle *bundle = nil;
NSError *error = nil;
bundle = [[NSBundle alloc] initWithPath:bundlePath];
if (!bundle) {
    return nil;
}

// Here i can access the keychain as usually
[bundle loadAndReturnError:&error];
// Well here it suddenly doesn't work anymore
// error is also nil

那么内部的包代码不使用钥匙串.可能这是某种安全逻辑？有什么线索吗？