iOS：NSInputStream / NSOutputStream - CFNetwork SSLHandshake失败（-9806）

Question

我正在尝试打开输入/输出流到安全服务器，但继续获取 CFNetwork SSLHandshake失败（-9806）

我为异常域等设置了plist值

<key>NSAppTransportSecurity</key>
<dict>
    <key>NSExceptionDomains</key>
    <dict>
        <key>someserver.com</key>
        <dict>
            <key>NSIncludesSubdomains</key>
            <true/>
            <key>NSThirdPartyExceptionMinimumTLSVersion</key>
            <string>TLSv1.0</string>
            <key>NSThirdPartyExceptionRequiresForwardSecrecy</key>
            <false/>
            <key>NSTemporaryExceptionAllowsInsecureHTTPLoads</key>
            <true/>
        </dict>
    </dict>
</dict>

我也在plist中试过这个：

<key>NSAppTransportSecurity</key>
<dict>
    <key>NSAllowsArbitraryLoads</key>
    <true/>
</dict>

这是我的代码：

-(void)startStream{


NSString *urlStr = @"https://stream.someserver.com";
NSURL *website = [NSURL URLWithString:urlStr];


CFReadStreamRef readStream;
CFWriteStreamRef writeStream;
CFStreamCreatePairWithSocketToHost(NULL, (CFStringRef)CFBridgingRetain([website host]), 443, &readStream, &writeStream);

NSInputStream *inputStream = (__bridge_transfer NSInputStream *)readStream;
NSOutputStream *outputStream = (__bridge_transfer NSOutputStream *)writeStream;


[inputStream setDelegate:self];
[outputStream setDelegate:self];

[inputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[outputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];


NSMutableDictionary *settings = [NSMutableDictionary dictionaryWithCapacity:1];
[settings setObject:(NSString *)NSStreamSocketSecurityLevelTLSv1 forKey:(NSString *)kCFStreamSSLLevel];
[settings setObject:[NSNumber numberWithBool:YES] forKey:(NSString *)kCFStreamSSLValidatesCertificateChain];
[settings setObject:@"stream.someserver.com" forKey:(NSString *)kCFStreamSSLPeerName];

CFWriteStreamSetProperty((CFWriteStreamRef)outputStream, kCFStreamPropertySSLSettings, (CFTypeRef)settings);
CFReadStreamSetProperty((CFReadStreamRef)inputStream, kCFStreamPropertySSLSettings, (CFTypeRef)settings);


[inputStream open];
[outputStream open];

}

在 CFNetwork SSLHandshake失败（-9806）错误被抛出之前，流打开后有大约5秒的延迟 。

注意：安全服务器不是我的，我无法更改任何设置。 它是经过测试和建立的服务器，具有许多用户流

Answer 1

我不确定ssl连接握手中哪个阶段失败，但您可以尝试将设置字典更改为以下内容：

 NSDictionary *settings = [[NSDictionary alloc] initWithObjectsAndKeys:
                          [NSNumber numberWithBool:YES], kCFStreamSSLAllowsExpiredCertificates,
                          [NSNumber numberWithBool:YES], kCFStreamSSLAllowsAnyRoot,
                          [NSNumber numberWithBool:YES], kCFStreamSSLAllowsExpiredRoots,
                          [NSNumber numberWithBool:NO], kCFStreamSSLValidatesCertificateChain,
                          //kCFNull,kCFStreamSSLPeerName,
                          kCFStreamSocketSecurityLevelSSLv3, kCFStreamSSLLevel,
                          [NSNumber numberWithBool:YES], kCFStreamPropertyShouldCloseNativeSocket,
                          nil];

如果成功，请删除上面定义的每个“安全漏洞”。

Answer 2

查看Apple文档 ，您似乎使用了错误的密钥。

例如

• NSThirdPartyExceptionMinimumTLSVersion必须是NSExceptionMinimumTLSVersion
• NSTemporaryExceptionAllowsInsecureHTTPLoads必须是NSExceptionAllowsInsecureHTTPLoads
• 和ecc ...

Answer 3

在SSL设置中，将kCFStreamSSLValidatesCertificateChain为@NO以完全禁用服务器信任评估。

在委托实现中，首次获取NSStreamEventHasSpaceAvailable或NSStreamEventHasBytesAvailable状态时，从流中检索kCFStreamPropertySSLPeerTrust属性。

您应该获得SecTrustRef ，您可以评估并获取以下信息：

SecTrustRef trust = (SecTrustRef)[stream propertyForKey:kCFStreamPropertySSLPeerTrust];
SecTrustResultType trustResult;
OSStatus status = SecTrustEvaluate(trust, &trustResult);
if (status != errSecSuccess) {
    NSLog(@"failed to evaluate");
} else {
    OSStatus trustResultCode = SecTrustGetTrustResult(trust, &trustResult);
}

最终的trustResultCode应该为您提供信任评估失败的具体原因。 根据具体原因，您可以修改SecTrustRef或创建一个全新的以获得成功的评估。

Apple技术说明HTTPS服务器信任评估非常有用。