ios - OSStatus 错误代码 -34018

Question

我正在使用 SecItemCopyMatching 来访问 iOS 钥匙串(keychain)。从后台重新启动应用程序后，我大约有一百分之一得到 -34018 结果代码。 The documentation状态:

The assigned error space for Keychain Services is discontinuous: –25240 through –25279 and –25290 through –25329. Keychain Item Services may also return noErr (0) or paramErr (–50), or CSSM result codes

所以看来 -34018 是一个'CSSM结果代码'。我关注了suggested link但找不到结果代码。

-34018 结果码是什么？如何获得更可靠的钥匙串(keychain)访问？

- (NSData *)getKeychainData:(NSString *)key
{
    NSDictionary *query = @{
        (__bridge id)kSecClass:(__bridge id)kSecClassGenericPassword,
        (__bridge id)kSecAttrService:SEC_ATTR_SERVICE,
        (__bridge id)kSecAttrAccount:key,
        (__bridge id)kSecReturnData:@YES
    };

    CFDataRef result = nil;

    OSStatus status = SecItemCopyMatching((__bridge CFDictionaryRef)query, (CFTypeRef *)&result);

    if(status == errSecItemNotFound) {
        return nil;
    }

    if(status == noErr) {
        return CFBridgingRelease(result);
    } else {
        [self logError:[NSString stringWithFormat:@"SecItemCopyMatching status %d", (int)status] :nil];
        return nil;
    }
}

Answer 1

经过一番研究，我发现:http://opensource.apple.com/source/Security/Security-55471/sec/Security/SecBasePriv.h

所以 -34018 是 errSecMissingEntitlement 并且评论说

Internal error when a required entitlement isn't present.

您在运行单元测试时是否遇到此错误？如果是这样，这可能会有所帮助:https://stackoverflow.com/a/22305193/171933

github 上的这个问题说它似乎只在从 Xcode 调试时发生:https://github.com/soffes/sskeychain/issues/97 (另见 https://stackoverflow.com/a/28256591/171933)

希望这会有所帮助!