I'm fetching data from iCloud and for that I need to generate a header (azure table storage).

I used the code below for that and it is generating the headers. But when I use these headers in my project it is showing "make sure that the value of authorization header is formed correctly including the signature."

I googled a lot and tried many codes but in vain.

Can anyone kindly please help me with where I'm going wrong in this code.

-(id)generat{

       NSString *messageToSign = [NSString stringWithFormat:@"%@/%@/%@", dateString,AZURE_ACCOUNT_NAME, tableName];



    NSString *key = @"asasasasasasasasasasasasasasasasasasasasas==";



    const char *cKey = [key cStringUsingEncoding:NSUTF8StringEncoding];

    const char *cData = [messageToSign cStringUsingEncoding:NSUTF8StringEncoding];





    unsigned char cHMAC[CC_SHA256_DIGEST_LENGTH];



    CCHmac(kCCHmacAlgSHA256, cKey, strlen(cKey), cData, strlen(cData), cHMAC);



    NSData *HMAC = [[NSData alloc] initWithBytes:cHMAC length:sizeof(cHMAC)];



    NSString *hash = [Base64 encode:HMAC];



    NSLog(@"Encoded hash: %@", hash);



    NSURL *url=[NSURL URLWithString: @"http://my url"];



    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];



    [request addValue:[NSString stringWithFormat:@"SharedKeyLite %@:%@",AZURE_ACCOUNT_NAME, hash] forHTTPHeaderField:@"Authorization"];





    [request addValue:dateString forHTTPHeaderField:@"x-ms-date"];



    [request addValue:@"application/atom+xml, application/xml"forHTTPHeaderField:@"Accept"];



    [request addValue:@"UTF-8" forHTTPHeaderField:@"Accept-Charset"];



    NSLog(@"Headers: %@", [request allHTTPHeaderFields]);



    NSLog(@"URL: %@", [[request URL] absoluteString]);



     return request; 

}



-(NSString*)rfc1123String:(NSDate *)date

{

    static NSDateFormatter *df = nil;

    if(df == nil)

    {

        df = [[NSDateFormatter alloc] init];

        df.locale = [[[NSLocale alloc] initWithLocaleIdentifier:@"en_US"] autorelease];

        df.timeZone = [NSTimeZone timeZoneWithAbbreviation:@"GMT"];

        df.dateFormat = @"EEE',' dd MMM yyyy HH':'mm':'ss 'GMT'";

    }

    return [df stringFromDate:date];

}