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Generate private keys

openssl ecparam -name sect571r1 -genkey -noout -out alice_priv_key.pem
openssl ecparam -name sect571r1 -genkey -noout -out bob_priv_key.pem

Extract public key

openssl ec -in alice_priv_key.pem -pubout -out alice_pub_key.pem
openssl ec -in bob_priv_key.pem -pubout -out bob_pub_key.pem

carlj

Coding Challenge

Regeln

• Googlen ist erlaubt
• Das Spicken der Lösung dagegen verboten
• der aktive Coder selbst ist stumm, nur seine beiden Pair Programmer dürfen sich mitteilen, diskutieren und Anweisungen geben
• die höchste Punktzahl laut coderbyte Website gewinnt
• Die Programmiersprache ist frei wählbar

Challenges

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How to do codereview

Step 1: Context

Check what should have been done

Step 2: Git Changes

Check the related git commit

Step 3: Syntax Check

Check if the Dev use the right syntax and follow the styleguide

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- (void)controllerWillChangeContent:(NSFetchedResultsController *)controller {
    // The fetch controller is about to start sending change notifications, so prepare the table view for updates.
    [self.tableView beginUpdates];
}


- (void)controller:(NSFetchedResultsController *)controller didChangeObject:(id)anObject atIndexPath:(NSIndexPath *)indexPath forChangeType:(NSFetchedResultsChangeType)type newIndexPath:(NSIndexPath *)newIndexPath {
    
    UITableView *tableView = self.tableView;
    

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#iOS Icon Guideline Dieses Dokument soll eine Übersicht über alle benötigten Icons für die iOS Plattformen 6 und 7 geben. Alle Information zu den Größen und die Verwendung der Icosn findet man in den iOS Human Interface Guidelines.

##App Icons

Device	Normal	Retina	iOS 7	Required
iPhone	57 x 57	114 x 114	120 x 120	YES
iPad	77 x 77	144 x 144	152 x 152	YES

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RSA File De- and Encryption

Docu for encrypt and decrypt a large file with AES and RSA

Keypairs

Generate RSA Keypairs

//generates a private Key with 8196 Bit. 
openssl genrsa -out private.pem 8196

carlj

//
//  Makro.h
//
//  Created by Carl Jahn
//  Copyright (c) 2013 Carl Jahn. All rights reserved.
//

#import <Foundation/Foundation.h>

//NSLogs

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//
//  ZoomView.m
//  ZoomView
//
//  Created by Carl Jahn on 15.08.13.
//  Copyright (c) 2013 Carl Jahn. All rights reserved.
//

#import "ZoomView.h"

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  NSURL *url = [NSURL URLWithString:@"http://cache-tester.herokuapp.com/contacts.json"];

  
  NSMutableURLRequest *req = [NSMutableURLRequest requestWithURL:url];

  [req setValue:@"\"3aa02883a2552b735e60c74ba4100548\"" forHTTPHeaderField:@"If-None-Match"];
  

  AFJSONRequestOperation *op = [AFJSONRequestOperation JSONRequestOperationWithRequest:req
                                                       success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {

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#import <Foundation/Foundation.h>

typedef id(^BankAccount)(char *cmd);
typedef id(^CurrentBalanceMethod)(void);
typedef id(^DepositMethod)(double);
typedef id(^WithdrawMethod)(double);

BankAccount CreateBankAccount(double initialBalance)
{
    // Initialization