Ed25519Signer.NET 34.0.0.7

Sign and Verify data using Ed25519 from RFC8032

Simple Usage

The easiest way to use Ed25519Signer.NET is by creating a Ed25519SignerService and/or Ed25519VerifierService

Sign

You can reuse this service to sign multiple pieces of data

Ed25519SignerService signer = new("private.pem", 2048);

byte[] signature = signer.Sign(new byte[64]);

Verify

You can reuse this service to verify multiple pieces of data

Ed25519VerifierService verifier = new("public3.txt", 2048);

bool success = verifier.Verify(signature, new byte[64]);

Generate Keys

This library can not generate new Private Keys

An easy way to generate keys is using Git Bash which can be downloaded Here

// Generate Private Key
openssl genpkey -algorithm ed25519 -out "C:\private.pem"

// Generate Public Key from the Private Key
openssl pkey -in "C:\private.pem" -pubout -out "C:\public.pem"

Advanced Usage

If you don't want to use either of the Services you can do everything manually.

Load Key from PEM File

Ed25519KeyDataReader privateKeyData = new Ed25519KeyDataReader("C:\\Keys\\private.pem");

Ed25519PrivateKey privatekey = Ed25519KeyFactory.CreatePrivateKey(privateKeyData.Read());

Load Key from Text File

Ed25519KeyDataReader privateKeyData = new Ed25519KeyDataReader("..\\..\\private3.txt", true);

Ed25519PrivateKey privatekey = Ed25519KeyFactory.CreatePrivateKey(privateKeyData.ReadFromTextFast());            

Load Key from .ED25519 File

Ed25519FileReader privateKeyData = new Ed25519FileReader("..\\..\\private.ED25519");

Ed25519PrivateKey privatekey = Ed25519KeyFactory.CreatePrivateKey(privateKeyData.ReadEd25519Fast());

Signing Data

Create a single use Signer

Ed25519Signer signer = new Ed25519Signer();

signer.Init(privatekey);

signer.BlockUpdate(new byte[32] /* data to sign */, 0 /* offset */, 32 /* data length*/);

byte[] output = signer.GenerateSignature();

signer.Reset();

Verifying Data

Create a single use Verifier

Ed25519Verifier verify = new Ed25519Verifier();

verify.Init(publicKey);

verify.BlockUpdate(new byte[32] /* same data to verify */, 0 /* offset */, 32 /* data length*/);

bool v = verify.VerifySignature(output);

verify.Reset();

Creating .ED25519 Files

Creates a .ED25519 file which has the key on the first line

new Ed25519KeyDataWriter("private.pem", "private.ED25519", true);