TLSTool/TLSToolClient.m

/*
     File: TLSToolClient.m
 Abstract: Core of the s_client implementation.
  Version: 1.0
 
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 */
 
#import "TLSToolClient.h"
 
#import "QNetworkAdditions.h"
#import "QHex.h"
 
@interface TLSToolClient ()
 
@end
 
@implementation TLSToolClient {
    SecIdentityRef  _clientIdentity;
}
 
- (instancetype)initWithHostName:(NSString *)hostName port:(NSInteger)port
{
    NSParameterAssert(hostName != nil);
    NSParameterAssert( (port > 0) && (port < 65536) );
    self = [super init];
    if (self != nil) {
        self->_hostName = [hostName copy];
        self->_port = port;
    }
    return self;
}
 
- (SecIdentityRef)clientIdentity
{
    @synchronized (self) {
        if (self->_clientIdentity == NULL) {
            return NULL;
        } else {
            return (SecIdentityRef) CFAutorelease( CFRetain(self->_clientIdentity) );
        }
    }
}
 
- (void)setClientIdentity:(SecIdentityRef)newValue
{
    @synchronized (self) {
        if (newValue != self->_clientIdentity) {
            if (self->_clientIdentity != NULL) {
                CFRelease(self->_clientIdentity);
            }
            self->_clientIdentity = newValue;
            if (self->_clientIdentity != NULL) {
                CFRetain(self->_clientIdentity);
            }
        }
    }
}
 
- (void)run
{
    dispatch_async(self.queue, ^{
        BOOL                success;
        NSInputStream *     inStream;
        NSOutputStream *    outStream;
        
        if (self.clientIdentity != NULL) {
            [self logWithFormat:@"client identity: %@", [self subjectSummaryForIdentity:self.clientIdentity]];
        }
        
        // Create and configure our streams.
        
        [QNetworkAdditions getStreamsToHostWithName:self.hostName port:self.port inputStream:&inStream outputStream:&outStream];
 
        if (NO) {
            // In many cases you can enable TLS with this code, which assumes a whole bunch 
            // of standard defaults.  In our case, however, we need to configure some non-standard 
            // properties so we have to use kCFStreamPropertySSLSettings.
 
            success = [inStream setProperty:NSStreamSocketSecurityLevelNegotiatedSSL forKey:NSStreamSocketSecurityLevelKey];
            assert(success);
        } else {
            NSMutableDictionary *   settings;
            
            settings = [NSMutableDictionary dictionary];
            if (self.disableServerTrustEvaluation) {
                settings[ (__bridge id)  kCFStreamSSLValidatesCertificateChain ] = @NO;
            }
            if (self.clientIdentity != NULL) {
                settings[ (__bridge id) kCFStreamSSLCertificates ] = @[ (__bridge id) self.clientIdentity ];
            }
            success = CFReadStreamSetProperty(
                (__bridge CFReadStreamRef) inStream, 
                kCFStreamPropertySSLSettings, 
                (__bridge CFDictionaryRef) settings
            ) != false;
            assert(success);
        }
 
        [self startConnectionWithInputStream:inStream outputStream:outStream];
    });
    
    dispatch_main();
}
 
- (void)connectionDidCloseWithError:(NSError *)error
{
    exit(error == nil ? EXIT_SUCCESS : EXIT_FAILURE);
}
 
@end