问题描述
我正在使用 CFStream/NSStream 建立 http 连接.我希望能够在三种情况下检测到 SSL 握手失败:
I'm using CFStream/NSStream to make http connections.I want to be able to detect that a SSL handshake fails for three cases:
- 情况 A:服务器不受信任
- 情况 B:服务器受信任但要求提供客户端证书
- 情况 C:服务器不受信任,它要求提供客户端证书
今天没有对我的 CFStream 的 SSL 属性做任何处理,我得到:
Today without doing anithing on the SSL Properties of my CFStream, I get:
- 情况 A:错误 -9807
- 情况 B:没有错误但服务器拒绝连接(错误 500)
- 情况 C:错误 9807
有没有办法配置CFStream来正确区分这3种情况?或者在 SSL 握手期间有一些回调?
Is there a way to configure CFStream to correctly distinguish these 3 cases ? Or to have some callbacks during SSL handshake ?
感谢您的帮助.
推荐答案
前段时间我在使用 SSL 的 CFSockets 中运行了同样的事情.CFStream 处理所有握手的事情.我为 NSStream 添加了一个小类(基本代码来自 Apple,不再有链接,如果我找到它我会添加它).这对我有用.
Some time ago I ran in a same thing with CFSockets using SSL. CFStream handles all the handshake stuff. I wrote a little class addition for NSStream (Base code comes from Apple, don't have the link anymore, if I find it I'll add it). That's what worked for me.
界面
@interface NSStream (FSNetworkAdditions)
+ (void)qNetworkAdditions_getStreamsToHostNamed:(NSString *)hostName
port:(NSInteger)port
inputStream:(out NSInputStream **)inputStreamPtr
outputStream:(out NSOutputStream **)outputStreamPtr;
@end
和实施
#import "FSNetworkAdditions.h"
@implementation NSStream (FSNetworkAdditions)
+ (void)qNetworkAdditions_getStreamsToHostNamed:(NSString *)hostName
port:(NSInteger)port
inputStream:(out NSInputStream **)inputStreamPtr
outputStream:(out NSOutputStream **)outputStreamPtr
{
CFReadStreamRef readStream;
CFWriteStreamRef writeStream;
assert(hostName != nil);
assert( (port > 0) && (port < 65536) );
assert( (inputStreamPtr != NULL) || (outputStreamPtr != NULL) );
readStream = NULL;
writeStream = NULL;
CFStreamCreatePairWithSocketToHost(
NULL,
(CFStringRef) hostName,
port,
((inputStreamPtr != NULL) ? &readStream : NULL),
((outputStreamPtr != NULL) ? &writeStream : NULL)
);
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];
if (readStream) {
CFReadStreamSetProperty(readStream, kCFStreamPropertySSLSettings, (CFTypeRef)settings);
}
if (writeStream) {
CFWriteStreamSetProperty(writeStream, kCFStreamPropertySSLSettings, (CFTypeRef)settings);
}
if (inputStreamPtr != NULL) {
*inputStreamPtr = CFBridgingRelease(readStream);
}
if (outputStreamPtr != NULL) {
*outputStreamPtr = CFBridgingRelease(writeStream);
}
}
@end
就是这样,您现在可以像这样连接到服务器:
That's it now you can connect to a Server like this:
NSInputStream *inputStream;
NSOutputStream *outputStream;
[NSStream qNetworkAdditions_getStreamsToHostNamed:host
port:port
inputStream:&inputStream
outputStream:&outputStream];
inputStream.delegate = self;
outputStream.delegate = self;
其中self"符合 NSStreamDelegate 协议.
Where "self" conforms to the NSStreamDelegate Protocol.
我希望这些片段能有所帮助.
I hope these snippets helps.
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