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

EdDSA Signature Generator

Generates a digital signature for a message using an EdDSA private key.

Source library: cryptography

Overview

EdDSA (Edwards-curve Digital Signature Algorithm) provides efficient and secure digital signatures. This node signs a message using an EdDSA private key (Ed25519 or Ed448), producing a signature that can be verified later with the corresponding public key.

Parameters

• key_type: The EdDSA curve to use (Ed25519 or Ed448).
• key_source: How to obtain the private key.
  • Fresh Key: Generates a new, random private key.
  • From Private Bytes: Uses a previously serialized private key.
  • From Loaded Key: Uses a private key object passed from another node.
• encoding: The encoding format for the private key (when key_source is "From Private Bytes"). Options: PEM, DER, Raw.
• formatting: The key format (when key_source is "From Private Bytes"). Options: PKCS8, OpenSSH, Raw.
• encryption: How the private key is encrypted (when key_source is "From Private Bytes"). Options: Best Available, None.
• encryption_password: (Optional) The password to decrypt the private key, if it was encrypted.
• private_key: (Optional) The serialized private key bytes (BYTESLIKE). Required when key_source is "From Private Bytes".
• serialized_key: (Optional) A loaded private key object (KEYOBJ). Required when key_source is "From Loaded Key".
• data: The message to sign, as a BYTESLIKE object.

Outputs

• signature: The generated signature as a BYTESLIKE object.
• public_key: The public key corresponding to the private key, as a KEYOBJ object. This can be passed to verification nodes.

Additional Considerations

• Fresh Key generates a cryptographically secure random key each time. For production use cases, this is the safest option. However, if you need reproducible signatures for some reason, use either of the existing loading options instead.
• When using From Private Bytes, ensure the key bytes are transmitted over a secure channel.
• EdDSA signatures are deterministic for a given key and message, which is a desirable property.