Hashes

1. Hash validation tools:
- HashCalc
- MD5 Calculator
- HashMyFiles
- Md5sum
- Chaosmd5
- Autopsy
- dc3dd

2. Hash type MD5
- 128-bit value 
- Very unlikely but possible to have two files get same value

3. Hash type Secure Hash Algorithm (SHA)
- SHA-1, SHA-224, SHA-256, SHA-384 and SHA-512
- SHA-1 produces a message digest that is 160-bits long
- SHA-224 produces a 224 and others represented by number

4. md5deep
- md5eep file_name
- md5eep -wM file_name_1 file_name_2

5. Simple tools:
- sha256sum file_name
- md5sum _file_name

6. How to check hash

---------------------------------------hashdeep---------------------------------
root@kali:~/hash_test# hashdeep hash.txt 
%%%% HASHDEEP-1.0
%%%% size,md5,sha256,filename
## Invoked from: /root/hash_test
## # hashdeep hash.txt
## 
18,ed650c02bd24a50eeef0b7b4a7a444f8,1b84e07e77fab43901d7701eb1468e4074c642175b987078eebf231cea913b38,/root/hash_test/hash.txt

---------------------------------------split---------------------------------
root@kali:~/hash_test# split -n 5 hash.txt hash_parts
root@kali:~/hash_test# ls
hash_partsaa  hash_partsab  hash_partsac  hash_partsad  hash_partsae  hash.txt

--------------------------------------combine---------------------------------
root@kali:~/hash_test# cat hash_partsa* > hash_1.txt

-------------------------------------finaly check---------------------------------
root@kali:~/hash_test# hashdeep hash.txt | egrep ^[0-9].*,.* && hashdeep hash_1.txt | egrep ^[0-9].*,.*
18,ed650c02bd24a50eeef0b7b4a7a444f8,1b84e07e77fab43901d7701eb1468e4074c642175b987078eebf231cea913b38,/root/hash_test/hash.txt
18,ed650c02bd24a50eeef0b7b4a7a444f8,1b84e07e77fab43901d7701eb1468e4074c642175b987078eebf231cea913b38,/root/hash_test/hash_1.txt