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Hash functions

• Hash functions meaning
• Hash functions meaning 2
• hashs functions properties

Practical example why hash is necessary

• Java code to perform md5 hashing - you have to remove the salt
• Hash function database for md5
• hash of word “password”

  5f4dcc3b5aa765d61d8327deb882cf99
  

• Linux Mint set hash function location

  /etc/login.defs
  

• linux lcrypt example
• crypt function first parameter - password chosen
• crypt function second parameter - $key$salt
• In this case
  • password - password1
  • key - 1 (means md5)
  • salt - NBSmdW0E
• result - $1$NBSmdW0E$PTcjork/6DMui1ogc2g/0. ~~~ #define _XOPEN_SOURCE #include #include

int main() { printf(“%s\n”, crypt(“password1”,”$1$NBSmdW0E”)); } ~~~

Cracking passwords with John

• Tutorial 1
• Tutorial 2
• Good tutorial about Cracking modes with John
  • John examples

PROXY

• Simple explanation

If you are very interested

• This tutorial involves understanding the booting process very thoroughly. It involves crypting the hardrive and setting up the booting manually to work with the encrypted harddrive. System Administration practical 2