lightdsa

from lightdsa import LightDSA # 1. Generate keys # For RSA, key_size must be between 1024 and 4096 (inclusive) # and a multiple of 256. dsa = LightDSA(key_size=2048) # Default is 2048 private_key_pem = dsa.private_key_to_pem().decode('utf-8') public_key_pem = dsa.public_key_to_pem().decode('utf-8') print("Private Key (PEM format):") print(private_key_pem) print("\nPublic Key (PEM format):") print(public_key_pem) # 2. Sign data message_to_sign = "This is a secret message." signature = dsa.sign(message_to_sign.encode('utf-8')) print(f"\nMessage: {message_to_sign}") print(f"Signature: {signature.hex()}") # 3. Verify signature using the current object's keys is_valid = dsa.verify(message_to_sign.encode('utf-8'), signature) print(f"Signature valid: {is_valid}") # You can also load keys from PEM strings into a new LightDSA instance dsa_loaded = LightDSA(key_size=2048) # key_size required for initialization dsa_loaded.load_public_key_from_pem(public_key_pem.encode('utf-8')) dsa_loaded.load_private_key_from_pem(private_key_pem.encode('utf-8')) # Optional for verification is_valid_loaded = dsa_loaded.verify(message_to_sign.encode('utf-8'), signature) print(f"Signature valid (loaded keys): {is_valid_loaded}")