Go

Ed25519 Sign and Verify

See more Ed25519 Examples

Demonstrates how to create an Ed25519 signature, and then to verify it.

Note: This example requires Chilkat v9.5.0.83 or greater.

Go

    success := false

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    privKeyHex := "1498b5467a63dffa2dc9d9e069caf075d16fc33fdd4c3b01bfadae6433767d93"
    pubKeyHex := "b7a3c12dc0c8c748ab07525b701122b88bd78f600c76342d27f25e5f92444cde"

    privKey := chilkat.NewPrivateKey()
    // This example shows only one way of loading an Ed25519 private key.
    // Chilkat can load other formats (JWK, PEM, ASN.1 DER, etc.)  
    // You may do so by calling LoadAnyFormat or LoadAnyFormatFile.
    success = privKey.LoadEd25519(privKeyHex,pubKeyHex)
    if success == false {
        fmt.Println(privKey.LastErrorText())
        privKey.DisposePrivateKey()
        return
    }

    // The data to be signed...
    bd := chilkat.NewBinData()
    bd.AppendString("Message for Ed25519 signing","utf-8")

    eddsa := chilkat.NewEdDSA()
    hexSig := eddsa.SignBdENC(bd,"hexlower",privKey)

    fmt.Println("signature = ", *hexSig)

    // The expected output is: 6dd355667fae4eb43c6e0ab92e870edb2de0a88cae12dbd8591507f584fe4912babff497f1b8edf9567d2483d54ddc6459bea7855281b7a246a609e3001a4e08

    // Verify the signature..
    pubKey := chilkat.NewPublicKey()
    success = pubKey.LoadEd25519(pubKeyHex)
    if success == false {
        fmt.Println(pubKey.LastErrorText())
        privKey.DisposePrivateKey()
        bd.DisposeBinData()
        eddsa.DisposeEdDSA()
        pubKey.DisposePublicKey()
        return
    }

    bVerified := eddsa.VerifyBdENC(bd,*hexSig,"hexlower",pubKey)
    if bVerified == false {
        fmt.Println(eddsa.LastErrorText())
        fmt.Println("Failed to verify the signature.")
        privKey.DisposePrivateKey()
        bd.DisposeBinData()
        eddsa.DisposeEdDSA()
        pubKey.DisposePublicKey()
        return
    }

    fmt.Println("The Ed25519 signature is verified!")

    privKey.DisposePrivateKey()
    bd.DisposeBinData()
    eddsa.DisposeEdDSA()
    pubKey.DisposePublicKey()