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Part 4 - Different Algorithms and Key lengths

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@modothprav modothprav released this 16 Aug 07:27
· 4 commits to master since this release
v4.0.0
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Learn about vigilant mode.

Specifications

  • Encrypts a plaintext file into a ciphertext file
  • Prints out the vector, computed mac and salts after generation during encryption
  • Need to specify the password during decryption and encryption
  • Secret key is generated by hashing passwords with a random salt
  • Can specify between Blowfish and AES algorithms
  • Can specify secret key length
  • Computed a Message Authentication code, mac to check for authentication and integrity
  • Writes metadata during encryption in ciphertext file
  • Reads metadata during decryption from ciphertext file
  • Allows user to query metadata of an encrypted file
  • Uses char arrays instead of strings for sensitive information such as the password
  • Clears the char arrays after use

General Commands

Encryption

% java FileEncryptor enc "password" plaintext.txt ciphertext.enc
% java FileEncryptor enc Blowfish "password" plaintext.txt ciphertext.enc
% java FileEncryptor enc 192 "password" plaintext.txt ciphertext.enc
% java FileEncryptor enc AES 256 "password" plaintext.txt ciphertext.enc

Decryption

% java FileEncryptor dec "password" ciphertext.enc plaintext.txt

Query Metadata

% java FileEncryptor info ciphertext.enc

Output

<---------------------------------------->
Secret Key: 4v3GURNUyxpT+wQ7V+7lnA==
Init Vector: Myg7C+La5xo7A9czkMvSlA==
Salt: FbXNYM6ofed26t/GY27/tQ==
Mac Key: XgYmnjFXo0aKTxGMc00uVHoeNYvXBTwRV5teJM8TitU=
Mac salt: 3X0+fVGznlZQtXN+4QW7aA==
Computed Mac: yiB/ldtDwyKMt4vcPfja+TC9guC+xzgoexFj+ciC6k8=
<---------------------------------------->
INFO: Encryption finished, saved at ciphertext.enc
<---------------------------------------->
Secret Key: 4v3GURNUyxpT+wQ7V+7lnA==
Init Vector: Myg7C+La5xo7A9czkMvSlA==
Salt: FbXNYM6ofed26t/GY27/tQ==
Mac Key: XgYmnjFXo0aKTxGMc00uVHoeNYvXBTwRV5teJM8TitU=
Mac salt: 3X0+fVGznlZQtXN+4QW7aA==
Computed Mac: yiB/ldtDwyKMt4vcPfja+TC9guC+xzgoexFj+ciC6k8=
Given Mac: yiB/ldtDwyKMt4vcPfja+TC9guC+xzgoexFj+ciC6k8=
<---------------------------------------->

INFO: Authentication passed, file integrity maintained
INFO: Decryption complete, open decrypted.txt
Assets 2
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