Computer and Network Security Project

• Use openssl library to develop security tool.
• Allow user to define encryption methods and keys.
• Encrypt/Decrypt using shared key.
• Sign/Verify files using private/public certificates.
• Encrypt + Sign/Decrypt + Verify files using private/public certificates.
• Use Python, C/C++, C#, Java, JavaScript.
• Make software application for desktop, web or mobile.

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Commands

AES Encryption Providing Key

python .\App.py -enc <file_name> -key <key_file_name>

• Can encrypt/decrypt any binary file.

AES Encryption Using a Generated Key

python .\App.py -enc <file_name> -gen

• Note: key is written to a file security is your responsibility.

AES Decryption

python .\App.py -dec <file_name> -key <key_file_name>

RSA Key Generation

python .\App.py -rsa -gen  

RSA Encryption Providing Key

python .\App.py -rsa -enc -inkey <public_key_file_name> <file_name>

RSA Encryption Generated Key

python .\App.py -rsa -enc -gen <file_name>

• Note: key is written to a file security is your responsibility.

RSA Decryption Providing Key

python .\App.py -rsa -dec -inkey <private_key_file_name> <message_encrypted_file_name>  

RSA Signature

python .\App.py -rsa -sign -gen <file_name>  

RSA Verification

python .\App.py -rsa -verify -inkey <public_key_file_name> <file_name> <signed_message_file_name> 

Hashing

python App.py -hash <algorithm_type> <file_name>

• Valid algorithms :
  • md5
  • sha1
  • sha224
  • sha256
  • sha384
  • sha512
  • blake2b
  • blake2s
  • sha3_224
  • sha3_256
  • sha3_384
  • sha3_512
  • shake_128
  • shake_256

Confidentiality + Authentication

Prepare Confidentiality + Authentication

python App.py -sign <file_name>  

Verify Confidentiality + Authentication

python App.py -verify <Message_Encrypted_File_Name>  <symmetric_key_file_name> <public_key_file_name>  

Self_Certification

python App.py -certify <subject_name> <issuer_name>