"Crypto.PublicKey.ECC" - Generate EC Keys

Python Tutorials - Herong's Tutorial Examples

∟"Crypto.PublicKey.ECC" - Generate EC Keys

This section provides a tutorial example on how to use 'Crypto.PublicKey.ECC' module to generate EC private-public key pairs in Python scripts.

The PyCryptodome library can also be used to generate EC private-public key pairs as shown in the following Python example script:

# Crypto-PublicKey-ECC-keys.py
# Copyright (c) 2025, HerongYang.com, All Rights Reserved.
#
import sys
if (len(sys.argv) < 2):
   print("Usage: Crypto-PublicKey-ECC-keys.py curve")
   exit()
curve = sys.argv[1]

from Crypto.PublicKey import ECC

private_key = ECC.generate(curve=curve.lower())
public_key = private_key.public_key()
print("Curve name: "+private_key.curve)
print("x: "+str(private_key.pointQ.x))
print("y: "+str(private_key.pointQ.y))
print("d: "+str(private_key.d))

print()
print("Private key: \n"
  + private_key.export_key(format='PEM'))
print()
print("Public key: \n"
  + public_key.export_key(format='PEM'))

Generate private-public key pairs of a given curve

herong$ python3 Crypto-PublicKey-ECC-keys.py secp256r1

Curve name: NIST P-256
x: 8029119512895961891904667501288228163039705301446446847345747...
y: 8708255998515365490821628412658056784605921994160276282147485...
d: 1029898379719206565456313804324047826628339586034115387837643...

Private key: 
-----BEGIN PRIVATE KEY-----
MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQg47IuvKMyksKv5RkP
c+EQN+NtlxPo6ngwyADXJNE+PAGhRANCAASxgzS8Lw4jDJPiAhkk9I3Jg9m5va9f
ja0XJQDaj6NbMsCG+3clN8s0lxp4Nxd/LfweYEvjagESGz+FT+VhKc6D
-----END PRIVATE KEY-----

Public key: 
-----BEGIN PUBLIC KEY-----
MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEsYM0vC8OIwyT4gIZJPSNyYPZub2v
X42tFyUA2o+jWzLAhvt3JTfLNJcaeDcXfy38HmBL42oBEhs/hU/lYSnOgw==
-----END PUBLIC KEY-----

Curves supported by the Crypto package

Canonical name   Aliases
--------------   ----------------------------------
NIST P-192       p192, P-192, prime192v1, secp192r1
NIST P-224       p224, P-224, prime224v1, secp224r1
NIST P-256       p256, P-256, prime256v1, secp256r1
NIST P-384       p384, P-384, prime384v1, secp384r1
NIST P-521       p521, P-521, prime521v1, secp521r1
Ed25519          ed25519
Ed448            ed448
Curve25519       curve25519
Curve448         curve448