Attempt to login to Instagram using their unofficial API (no OAuth tokens).

main.m

//
//  main.m
//  ER1
//
//  Created by @zaersk_ on 7/19/14.
//  Copyright (c) 2014 Zaersk. All rights reserved.
//
// Attempt to login to Instagram using their unofficial API (no OAuth tokens).

#import <Foundation/Foundation.h>
#import <CommonCrypto/CommonHMAC.h>

@interface ER1 : NSObject {
    
}

@end

@implementation ER1 : NSObject

-(void)sayHi {
    
    // Get Device UUID
    NSString *uuid = [[NSUUID UUID] UUIDString];
    NSString *password = @"password";
    NSString *username = @"username";
    NSString *csrftoken = @"missing"; // # Don't change this, smartypants #
    
    NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:
                          uuid, @"_uuid",
                          password, @"password",
                          username, @"username",uuid,@"device_id",@NO,@"from_reg",csrftoken,@"_csrftoken", nil];
    NSError *error2;
    NSData* jsonData = [NSJSONSerialization dataWithJSONObject:dict options:kNilOptions error:&error2];
    
    NSLog(@"%@",hexHash(jsonData));
    
    NSString *jsonDataString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
    NSString *signedBody = [NSString stringWithFormat:@"%@.%@",hexHash(jsonData),jsonDataString];
    NSString *igSigKeyVersion = @"4";
    
    NSLog(@"%@",signedBody);
    // Instagram Login
    NSMutableURLRequest *requestCreatePost = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:@"https://i.instagram.com/api/v1/accounts/login/"]];
    
    NSString *boundary = uuid;
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
    
    NSString *createPostLength = [NSString stringWithFormat:@"%lu", (unsigned long)[signedBody length]];
    [requestCreatePost setHTTPMethod:@"POST"];
    [requestCreatePost setValue:createPostLength forHTTPHeaderField:@"Content-Length"];
    [requestCreatePost setValue:contentType forHTTPHeaderField:@"Content-Type"];
    [requestCreatePost addValue:@"Instagram 6.0.4 (iPhone4,1; iPhone OS 7_1_2; en_US; en) AppleWebKit/420+" forHTTPHeaderField:@"User-Agent"];
    [requestCreatePost setValue:@"en;q=1, fr;q=0.9, de;q=0.8, zh-Hans;q=0.7, zh-Hant;q=0.6, ja;q=0.5" forHTTPHeaderField:@"Accept-Language"];
    [requestCreatePost setValue:@"mid=U8RKdAAAAAHC0GFTAhi4DgVV15bs" forHTTPHeaderField:@"Cookie"];
    
    
    NSMutableData *body = [NSMutableData data];
    [body appendData:[[NSString stringWithFormat:@"\r--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"signed_body\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"%@", signedBody] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"ig_sig_key_version\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"%@", igSigKeyVersion] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    
    [requestCreatePost setHTTPBody:body];
    
    NSData *data2 = [NSURLConnection sendSynchronousRequest:requestCreatePost returningResponse:nil error:nil];
    NSString *dataString2 = [[NSString alloc] initWithData:data2 encoding:NSASCIIStringEncoding];
    NSLog(@"%@", dataString2);
     
}

static NSString * hexHash(NSData * input) {
    unsigned char output[CC_SHA256_DIGEST_LENGTH];
    CC_SHA256(input.bytes, (unsigned int)input.length, output);
    NSMutableString * str = [NSMutableString string];
    for (int i = 0; i < CC_SHA256_DIGEST_LENGTH; i++) {
        [str appendFormat:@"%02x", output[i]];
    }
    return str;
}

@end

int main(int argc, const char * argv[])
{

    @autoreleasepool {
        
        // insert code here...
        
        ER1 *er = [ER1 new];
        [er sayHi];
        
    }
    return 0;
    
}

It says "Your version of Instagram is out of date." Even if I set Instagram 6.6.1 version.