Question

我想知道是否有人可以帮助我了解如何将SSL证书处理添加到同步连接到https服务。

我知道如何使用异步连接但不是同步连接。

                NSString *URLpath = @"https://mydomain.com/";
    NSURL *myURL = [[NSURL alloc] initWithString:URLpath];
    NSMutableURLRequest *myURLRequest = [NSMutableURLRequest requestWithURL:myURL cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:60];
    [myURL release];
    [myURLRequest setHTTPMethod:@"POST"];

    NSString *httpBodystr = @"setting1=1";
    [myURLRequest setHTTPBody:[httpBodystr dataUsingEncoding:NSUTF8StringEncoding]];

    NSHTTPURLResponse* myURLResponse; 
    NSError* myError;
    NSData* myDataResult = [NSURLConnection sendSynchronousRequest:myURLRequest returningResponse:&myURLResponse error:&myError];

            //I guess I am meant to put some SSL handling code here

谢谢。

Answer 1

使用静态sendSynchronousRequest函数是不可行的，但我找到了另一种选择。

首先 NSURLConnectionDataDelegate 这样的对象

FailCertificateDelegate.h

@interface FailCertificateDelegate : NSObject <NSURLConnectionDataDelegate>
   @property(atomic,retain)NSCondition *downloaded;
   @property(nonatomic,retain)NSData *dataDownloaded;
   -(NSData *)getData;
@end

FailCertificateDelegate.m

#import "FailCertificateDelegate.h"

@implementation FailCertificateDelegate
@synthesize dataDownloaded,downloaded;
-(id)init{
    self = [super init];
    if (self){
        dataDownloaded=nil;
        downloaded=[[NSCondition alloc] init];   
    }
    return self;
}


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


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


- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
    [downloaded signal]; 
    [downloaded unlock];
    self.hasFinnishLoading = YES; 
} 
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{
    [dataDownloaded appendData:data];
    [downloaded lock]; 
} 

-(NSData *)getData{
    if (!self.hasFinnishLoading){
        [downloaded lock]; 
        [downloaded wait]; 
        [downloaded unlock]; 
    } 

    return dataDownloaded; 
}

@end

使用它

FailCertificateDelegate *fcd=[[FailCertificateDelegate alloc] init];
NSURLConnection *c=[[NSURLConnection alloc] initWithRequest:request delegate:fcd startImmediately:NO];
[c setDelegateQueue:[[NSOperationQueue alloc] init]];
[c start];    
NSData *d=[fcd getData];

现在您将获得使用nsurlconnection的异步使用和简单同步连接的好处的所有好处，该线程将被阻止，直到您下载委托上的所有数据，但您可以改进它在FailCertificateDelegate类上添加一些错误控制

编辑：修复大数据。基于Nikolay DS的评论。非常感谢

Answer 2

我有类似的问题。在我的情况下，我有一个同步连接使用ssl根据需要使用两个委托方法，允许我接受任何证书：

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

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

但我仍然坚持以同步的方式做同样的事情。我在网上搜索，直到找到你的帖子，不幸的是另一个stackoverflow post暗示你不能在NSURLConnection上执行同步调用并使用ssl（因为缺少委托来处理ssl身份验证过程）。我最终做的是获得ASIHTTPRequest并使用它。这样做很轻松，花了我一个小时的时间来完成它的工作。这是我如何使用它。

+ (NSString *) getSynchronously:(NSDictionary *)parameters {
    NSURL *url = [NSURL URLWithString:@"https://localhost:8443/MyApp/";
    ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
    NSString *parameterJSONString = [parameters JSONRepresentation];
    [request appendPostString:parameterJSONString];
    [request addRequestHeader:@"User-Agent" value:@"MyAgent"];
    request.timeOutSeconds = CONNECTION_TIME_OUT_INTERVAL;
    [request setValidatesSecureCertificate:NO];
    [request startSynchronous];

    NSString *responseString = [request responseString];
    if (request.error) {
        NSLog(@"Server connection failed: %@", [request.error localizedDescription]);
    } else {
        NSLog(@"Server response: %@", responseString);
    }

    return responseString;
}

当然重要的部分是

[request setValidatesSecureCertificate:NO];

另一个替代方法是使用上述两种方法在另一个具有a-synch连接的线程中处理下载，并阻止您希望同步连接的线程，直到请求完成为止

Answer 3

我很接近使用下面的代码找到解决方案。这有效，但经常崩溃可能是因为我在编写代码的方式上做错了，而且我对使用的方法没有很强的理解。但是，如果有人对如何改善这一点有任何建议请发帖。

紧接着这一行：

NSError* myError;

就在行前：

NSData* myDataResult = [NSURLConnection sendSynchronousRequest:myURLRequest       
returningResponse:&myURLResponse error:&myError];

添加：

    int failureCount = 0;
    NSURLProtectionSpace *protectionSpace = [[NSURLProtectionSpace alloc]      
    initWithHost:@"mydomain.com" port:443 protocol:@"https"  realm:nil  
    authenticationMethod:NSURLAuthenticationMethodServerTrust];

    NSURLResponse *response = [[NSURLResponse alloc] initWithURL:myURL MIMEType:@"text/html" 
    expectedContentLength:-1 textEncodingName:nil]; 

    NSURLAuthenticationChallenge *challange = [[NSURLAuthenticationChallenge alloc] 
    initWithProtectionSpace:protectionSpace proposedCredential:[NSURLCredential 
    credentialForTrust:protectionSpace.serverTrust] previousFailureCount:failureCount 
    failureResponse:response error:myError sender:nil];

iPhone上的同步SSL证书处理

3 个答案: