public static bool VerifySignature(string publicKeyHex, string message, string signature)
{
var byt = Utils.HexToBytes(publicKeyHex);
var publicKey = PublicKey.fromString(byt);
return(Ecdsa.verify(message, Signature.fromBase64(signature), publicKey));
}
public static bool VerifySignature(string publicKeyHex, string message, string signature)
{
var @byte = publicKeyHex.ConvertHexToByteArray();
var publicKey = PublicKey.fromString(@byte);
return(Ecdsa.verify(message, Signature.fromBase64(signature), publicKey));
}
/// <summary>
/// Verify signed event webhook requests.
/// </summary>
/// <param name="publicKey">elliptic curve public key</param>
/// <param name="payload">event payload in the request body</param>
/// <param name="signature">value obtained from the 'X-Twilio-Email-Event-Webhook-Signature' header</param>
/// <param name="timestamp">value obtained from the 'X-Twilio-Email-Event-Webhook-Timestamp' header</param>
/// <returns>true or false if signature is valid</returns>
public bool VerifySignature(PublicKey publicKey, string payload, string signature, string timestamp)
{
var timestampedPayload = timestamp + payload;
var decodedSignature = Signature.fromBase64(signature);
return(Ecdsa.verify(timestampedPayload, decodedSignature, publicKey));
}
public void testVerifyRightMessage()
{
PrivateKey privateKey = new PrivateKey();
PublicKey publicKey = privateKey.publicKey();
string message = "This is the right message";
Signature signature = Ecdsa.sign(message, privateKey);
Assert.True(Ecdsa.verify(message, signature, publicKey));
}
public void testVerifyWrongMessage()
{
PrivateKey privateKey = new PrivateKey();
PublicKey publicKey = privateKey.publicKey();
string message1 = "This is the right message";
string message2 = "This is the wrong message";
Signature signature = Ecdsa.sign(message1, privateKey);
Assert.False(Ecdsa.verify(message2, signature, publicKey));
}
public bool IsValid()
{
if (this.FromAddress is null)
{
return(true);
}
if (this.Signature is null)
{
throw new Exception("No signature is in this transaction");
}
return(Ecdsa.verify(this.CalculateHash(), this.Signature, this.FromAddress));
}
public void testAssign()
{
// Generated by: openssl ecparam -name secp256k1 -genkey -out privateKey.pem
string privateKeyPem = EllipticCurve.Utils.File.read("files/privateKey.pem");
PrivateKey privateKey = PrivateKey.fromPem(privateKeyPem);
string message = EllipticCurve.Utils.File.read("files/message.txt");
Signature signature = Ecdsa.sign(message, privateKey);
PublicKey publicKey = privateKey.publicKey();
Assert.True(Ecdsa.verify(message, signature, publicKey));
}
public void testVerifySignature()
{
// openssl ec -in privateKey.pem -pubout -out publicKey.pem
string publicKeyPem = EllipticCurve.Utils.File.read("files/publicKey.pem");
// openssl dgst -sha256 -sign privateKey.pem -out signature.binary message.txt
byte[] signatureDer = EllipticCurve.Utils.File.readBytes("files/signatureDer.txt");
string message = EllipticCurve.Utils.File.read("files/message.txt");
PublicKey publicKey = PublicKey.fromPem(publicKeyPem);
Signature signature = Signature.fromDer(signatureDer);
Assert.True(Ecdsa.verify(message, signature, publicKey));
}
//method to evaluate if it is a valid transaction
public bool IsValid()
{
//mining rewards, no from address listed
if (this.FromAddress is null)
{
return(true);
}
//check for signature
if (this.Signature is null)
{
throw new Exception("No Signature in this transaction");
}
return(Ecdsa.verify(this.CalculateHash(), this.Signature, this.FromAddress));
}