在iOS 5.0/5.0.1上使用SSL的ASIHTTPRequest失败

Question

我正在使用HTTPSv1.8.1发出ASIHTTPRequest请求。问题是它不能在iOS 5.0和5.0.1上工作，而在5.1和5.1.1上工作得很好。代码非常简单：

__block ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:[NSURL URLWithString:RemoteNotiURL]];
[request setPostValue:@"i" forKey:@"plat"];
[request setPostValue:token forKey:@"token"];
[request setValidatesSecureCertificate:NO];

[request setCompletionBlock:^{
    NSLog(@"done");
}];

[request setFailedBlock:^{
    NSLog(@"error = %@", [request error]);

}];

[request startAsynchronous];

RemoteNotiURL是一个类似于https://xxx.example.com的网址

错误是：

error = Error Domain=ASIHTTPRequestErrorDomain Code=1 "A connection failure occurred: SSL problem (Possible causes may include a bad/expired/self-signed certificate, clock set to wrong date)" UserInfo=0x18460b0 {NSUnderlyingError=0x1853ab0 "The operation couldn’t be completed. (OSStatus error -9800.)", NSLocalizedDescription=A connection failure occurred: SSL problem (Possible causes may include a bad/expired/self-signed certificate, clock set to wrong date)}

对此我能做些什么呢？

Answer 1

正如@JosephH所说，解决方案包括修改ASIHTTPRequest.m以更改sslProperties字典的kCFStreamSSLLevel属性。在此文件中，查找注释// Tell CFNetwork not to validate SSL certificates

在此注释下有一个if子句

if (![self validatesSecureCertificate]) {
        // see: http://iphonedevelopment.blogspot.com/2010/05/nsstream-tcp-and-ssl.html

        NSDictionary *sslProperties = [[NSDictionary alloc] initWithObjectsAndKeys:
                                       [NSNumber numberWithBool:YES], kCFStreamSSLAllowsExpiredCertificates,
                                       [NSNumber numberWithBool:YES], kCFStreamSSLAllowsAnyRoot,
                                       [NSNumber numberWithBool:NO],  kCFStreamSSLValidatesCertificateChain,
                                       kCFNull,kCFStreamSSLPeerName,
                                       nil];

        CFReadStreamSetProperty((CFReadStreamRef)[self readStream], 
                                kCFStreamPropertySSLSettings, 
                                (CFTypeRef)sslProperties);
        [sslProperties release];
    }

如下所示修改if子句

if (![self validatesSecureCertificate]) {
        // see: http://iphonedevelopment.blogspot.com/2010/05/nsstream-tcp-and-ssl.html

        NSDictionary *sslProperties = [[NSDictionary alloc] initWithObjectsAndKeys:
                                       [NSNumber numberWithBool:YES], kCFStreamSSLAllowsExpiredCertificates,
                                       [NSNumber numberWithBool:YES], kCFStreamSSLAllowsAnyRoot,
                                       [NSNumber numberWithBool:NO],  kCFStreamSSLValidatesCertificateChain,
                                       kCFNull,kCFStreamSSLPeerName,
                                       @"kCFStreamSocketSecurityLevelTLSv1_0SSLv3", kCFStreamSSLLevel,
                                       nil];

        CFReadStreamSetProperty((CFReadStreamRef)[self readStream], 
                                kCFStreamPropertySSLSettings, 
                                (CFTypeRef)sslProperties);
        [sslProperties release];
    }else {
        NSDictionary *sslProperties = [[NSDictionary alloc] initWithObjectsAndKeys:
                                       [NSNumber numberWithBool:NO], kCFStreamSSLAllowsExpiredCertificates,
                                       [NSNumber numberWithBool:NO], kCFStreamSSLAllowsAnyRoot,
                                       [NSNumber numberWithBool:YES],  kCFStreamSSLValidatesCertificateChain,
                                       @"kCFStreamSocketSecurityLevelTLSv1_0SSLv3", kCFStreamSSLLevel,
                                       nil];

        CFReadStreamSetProperty((CFReadStreamRef)[self readStream], 
                                kCFStreamPropertySSLSettings, 
                                (CFTypeRef)sslProperties);
        [sslProperties release];
    }

这应该会使请求再次工作。验证SSL证书的请求和不验证SSL证书的请求。

已在IOS 5.0.1和5.1.1上测试。

希望这能有所帮助。