DigSig

Digital signatures with Python

The private key detection is automatic with the class PrivateKey. It currently works with RSA (X.509 with PKCS#12 files: .p12, or .pfx) and with ECDSA (Ethereum account exported in a JSON file).

Install

pip install digsig

Load keys

Automatic detection

RSA (X.509)

from digsig import PrivateKey, PublicKey

private_key = PrivateKey.get_instance('fnmt.p12', 'p4ssw0rd')
signature = private_key.sign('message')

# public_key = private_key.public_key
public_key = PublicKey.get_instance('fnmt.pem')

ECDSA (Ethereum)

from digsig import PrivateKey, PublicKey

private_key = PrivateKey.get_instance('ethereum.json', 'p4ssw0rd')

signature = private_key.sign('message')

public_key = private_key.public_key

RSA

from digsig import RsaPrivateKey, RsaModes, RsaFormats

private_key = RsaPrivateKey('fnmt.p12', 'p4ssw0rd', mode=RsaModes.PSS_MGF1_SHA3_256)
signature = private_key.sign('message')

# public_key = private_key.public_key
public_key = RsaPublicKey('fnmt.pem', mode=RsaModes.PSS_MGF1_SHA3_256)

ECDSA

from digsig import EcdsaPrivateKey, EcdsaModes

private_key = EcdsaPrivateKey('account.json', 'p4ssw0rd', mode=EcdsaModes.SECP256K1_SHA3_256)
signature = private_key.sign('message')

public_key = private_key.public_key

Verify signature

from digsig.errors import InvalidSignatureError

try:
    public_key.verify(signature)
except InvalidSignatureError:
    print('Invalid signature.')

Generate keys

RSA

from digsig import RsaPrivateKey, RsaModes

private_key = RsaPrivateKey(mode=RsaModes.PSS_MGF1_SHA256)
public_key = private_key.public_key

ECDSA

from digsig import EcdsaPrivateKey, EcdsaModes

private_key = EcdsaPrivateKey(mode=EcdsaModes.SECP256K1_KECCAK_256_ETHEREUM)
public_key = private_key.public_key

Export keys

RSA

private_pem = private_key.private_pem
public_pem = private_key.public_key.public_pem

ECDSA

private_value = private_key.private_value
private_value_bytes = private_key.private_value_bytes
private_value_hex = private_key.private_value_hex
private_value_base64 = private_key.private_value_base64
ethereum_keystore = private_key.get_ethereum_account()

public_value = private_key.public_key.public_value
public_bytes = private_key.public_key.public_bytes
public_base64 = private_key.public_key.public_base64
ethereum_address = private_key.public_key.ethereum_address

Supported modes

RSA

To-Do

ECDSA

To-Do

Supported formats

RSA

To-Do

ECDSA

To-Do