AzelusLightvale-ComfyUI-ARG-Toolkit/web/docs/XPrivateKeyFormat.md

ECDH Private Key Bytes

Generates an X25519 or X448 private key and serializes it.

Source library: cryptography

Overview

X25519 and X448 are elliptic curves designed for Diffie-Hellman key exchange (ECDH). This node generates a private key for one of these curves and serializes it into bytes. X25519 is the most widely adopted, used in modern protocols like TLS 1.3 and Noise.

Parameters

• key_type: The curve to use (x25519 or x448).
• encoding: The encoding format for the serialized key.
  • PEM: Privacy-Enhanced Mail format.
  • DER: Distinguished Encoding Rules (binary).
  • Raw: The raw key bytes.
• formatting: The key format.
  • PKCS8: Standard format for private keys.
  • Raw: The raw key material.
• encryption: How to encrypt the private key (Best Available or None).
• encryption_password: (Optional) The password for encrypting the private key.

Outputs

• private_bytes: The serialized private key as a BYTESLIKE object.
• private_key: The loaded private key object (KEYOBJ), which can be passed to the ECDH Shared Key Exchange node.

Additional Considerations

• X25519/X448 keys are used exclusively for key exchange, not for signing. Use EdDSA (Ed25519/Ed448) for signatures.
• The Raw format with NoEncryption stores the key in its most vulnerable state. Use only in secure environments.