NSign.BouncyCastle 0.19.2

NSign extensions using BouncyCastle

This library must be used together with other NSign libraries. It provides support for signatures and signature verifications for EdDSA using curve edwards25519.

Usage

Signature provider for EdDSA using cure edwards 25519

var provider = new EdDsaEdwards25519SignatureProvider(
	privateKey,
	publicKey,
	"the-key-id"));

Here, privateKey and publicKey are instances of Ed25519PrivateKeyParameters and Ed25519PublicKeyParameters from the BouncyCastle.Cryptography package respectively.

If you have the keys in PEM-formatted files, you can use the PemReader from the same BouncyCastle package to read those keys. If you have a .pfx or a .cer file, you can use openssl to extract the keys. For instance:

# Extract the ed25519 private key from a .pfx file holding an ed25519 private key:
openssl pkcs12 -in my.pfx -nocerts -nodes -out my-priv.pem

# Extract the public key from the above extracted private key
openssl pkey -in my-priv.pem -pubout -out my-pub.pem

## OR, if you just have the public key in a certificate file:
openssl x509 -in my.cer -pubkey -nocert -out my-pub.pem

Make sure to consult the documentation of your openssl installation for more details.