xcode ios HMAC SHA 256 hashing

Question

So I\'m trying to figure out how to do a hmacshad256 hash on ios as that\'s the hash I did for the wcf service api I made. I\'ve been trying to look for some info about it but w

Answer 1

NSString * parameters = @"string to hash"
NSString *salt = @"saltStringHere";
NSData *saltData = [salt dataUsingEncoding:NSUTF8StringEncoding];
NSData *paramData = [parameters dataUsingEncoding:NSUTF8StringEncoding];
NSMutableData* hash = [NSMutableData dataWithLength:CC_SHA256_DIGEST_LENGTH ];
CCHmac(kCCHmacAlgSHA256, saltData.bytes, saltData.length, paramData.bytes, paramData.length, hash.mutableBytes);
NSString *base64Hash = [hash base64Encoding];

and also

#import 

Since base64Encoding is deprecated from iOS 7.0, the last line should be:

NSString *base64Hash = [hash base64EncodedStringWithOptions:0];