无法识别 iOS OSStatus 代码

Question

我在 iOS 应用程序中有一个非常奇怪的行为。 我从 iOS 6 切换到 iOS 7。在 iOS 6 中一切正常。

- (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;
}

当应用启动时，- (NSData *)searchKeychainCopyMatching:(NSString *)identifier 函数会从钥匙串中加载值。一切正常一段时间。但是在大约 15 次成功的值请求之后，我得到了一个错误。

操作系统状态码 -34018

SecItemCopyMatching 函数返回该错误代码。文档说

@result 结果代码。请参阅“安全错误代码”(SecBase.h)。

但在 SecBase.h 中只指定了这些 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. */
};

这些值不会被覆盖，已经检查过。

最后但并非最不重要的是搜索字典：

编辑 - 新信息

我调试了一整天，发现了一些消息。我正在下载一个包含可执行包的 Zip 文件。这是一个内部应用程序，因此无需担心审查指南中的第 2.7 点和第 2.8 点。成功加载捆绑包后，出现权利错误。

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

嗯，里面的捆绑代码不使用钥匙串。可能这是某种安全逻辑？有什么线索吗？

Answer 1

此错误表明您的应用权利存在问题。找到this：原因通常是应用的entitlements中的App Identifier Prefix与provisioning profile中的App Identifier Prefix不匹配。

要进行验证，请使用协同设计工具查看您应用的权利：

codesign -d --entitlements - MyApp.app/

然后，将 App Identifier Prefix 与配置文件中的进行比较：

cat MyApp.app/embedded.mobileprovision