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Showing posts from May, 2018

Client Server Example Program In C Language

Namaste Guys,



Today, In this post, I am going to share with you a very simple example of client and server model written in c language..
Actually, These scripts are very easy to understand but still, to make sure that all beginners will understand. I had used many comments in codes. These comments will help you to understand this script.

Note:

1. These Scripts are Tested In Ubuntu Only.
2. For More Description About Syntax, Use Ubuntu man page.


Client.c

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 // include header#include<stdlib.h> // standard libra…

Binary Exploitation Protostar Heap3 - Walkthrough

Hello Guyz,



Welcome again to my blog. Today, I am going to share with you my walkthrough experience of Exploit-Exercise Protostar Heap3 Level.

In This Level, Our Task Is to perform exploitation using Heap Overflow Concept. Well, Guys Reality is, This level is really very hard for beginners but, guyz its really very interesting level. I will encourage you all to spend some time with this level, do some research about DLmallloc vulnerability, Read some research papers, analyse the actual source code on your own. In this level we are going to learn Dlmalloc vulnerability in old C language library. Actually, The Basic concept is here, With the help of dlmalloc automatic free space handling function, we can overwrite address in GOT table.


Before Starting Our Walkthrough Let's Take a Look At Hints And Details.
Note: I want to highlight Few Points.I'm not the creator of protostar war game. I am just a player.Here, I am Just providing you hints and reference so, that if you feel st…

Simple Python Blockchain Implementation - Simplecoin part 4

Namaste Friends,



Sorry For my late blog posts, Actually I'm still busy in studying blockchain and bitcoin concepts. So, Today, again I am going to share with you a new python script where I tried to add some more features in previous simple blockchain based ledger python script.


For the Previous post

Part 1: check here
Part 2: check here
Part 3:  check here
NoteTutorials And Reference For This Script Coming Soon...Sorry For Less Comments And Bad Coding Styles.
Actually, Guys, I'm Still Busy In Developing This Script To Make More Advance, Adding More Features In It.
So, I'm Open For Suggestions Comments And Contributions.

Some Key Features Of This Script.Transactions Feature SupportedTransaction Address SupportedDouble Spend Detection SupportedStrict Transaction Validations SupportedSimple wallet SupportedMiner Automatic Reward Receiving SupportedTransactions Merkle Data hashing Algorithm SupportedBlock Hashing Verification SupportedPrevious block hash verification supporte…

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