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NSURLConnection实现HTTPS(SSL)链接请求

2014-04-24 14:08 411 查看

最近检测APP应用的网络请求，发现HTTP方式的接口，请求的数据比较容易让不道德的人截取并加以利用。所以建议接口请求数据的方式还是使用HTTPS(SSL)，相对的安全些。

在iOS中，使用NSURLConnection来请求HTTPS，就需要处理SSL认证，NSURLConnectionDelegate中定义了处理认证的方法：

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– connection:canAuthenticateAgainstProtectionSpace:
– connection:didReceiveAuthenticationChallenge:
- connection:didCancelAuthenticationChallenge:

NSURLConnection中处理SSL

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- (BOOL)connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace{
return [protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust];
}

接收任何证书

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- (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge{
[challenge.sender useCredential:[NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust] forAuthenticationChallenge:challenge];
}

使用私有证书验证

- (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge
{
static CFArrayRef certs;
if (!certs) {
NSData *certData =[NSData dataWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"srca" ofType:@"cer"]];
SecCertificateRef rootcert =SecCertificateCreateWithData(kCFAllocatorDefault,CFBridgingRetain(certData));
const void *array[1] = { rootcert };
certs = CFArrayCreate(NULL, array, 1, &kCFTypeArrayCallBacks);
CFRelease(rootcert);    // for completeness, really does not matter
}

SecTrustRef trust = [[challenge protectionSpace] serverTrust];
int err;
SecTrustResultType trustResult = 0;
err = SecTrustSetAnchorCertificates(trust, certs);
if (err == noErr) {
err = SecTrustEvaluate(trust,&trustResult);
}
CFRelease(trust);
BOOL trusted = (err == noErr) && ((trustResult == kSecTrustResultProceed)||(trustResult == kSecTrustResultConfirm) || (trustResult == kSecTrustResultUnspecified));

if (trusted) {
[challenge.sender useCredential:[NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust] forAuthenticationChallenge:challenge];
}else{
[challenge.sender cancelAuthenticationChallenge:challenge];
}
}

AFNetWorking框架中处理SSL

使用AFURLConnectionOperation类的两个方法，将上面的代码以block方式传入即可。

1 2	– setAuthenticationAgainstProtectionSpaceBlock: – setAuthenticationChallengeBlock:

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