@@ -71,17 +71,19 @@
 			memcpy(extendedSaltItems + param.saltLength, &i, 4);
 
 			[param.HMAC reset];
 			[param.HMAC updateWithBuffer: extendedSaltItems
 					      length: param.saltLength + 4];
+			[param.HMAC calculate];
 			memcpy(bufferItems, param.HMAC.digest, digestSize);
 			memcpy(digestItems, param.HMAC.digest, digestSize);
 
 			for (size_t j = 1; j < param.iterations; j++) {
 				[param.HMAC reset];
 				[param.HMAC updateWithBuffer: digestItems
 						      length: digestSize];
+				[param.HMAC calculate];
 				memcpy(digestItems, param.HMAC.digest,
 				    digestSize);
 
 				for (size_t k = 0; k < digestSize; k++)
 					bufferItems[k] ^= digestItems[k];