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(Lianja) Ed25519 Sign and VerifyDemonstrates how to create an Ed25519 signature, and then to verify it. Note: This example requires Chilkat v9.5.0.83 or greater.
// This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. lcPrivKeyHex = "1498b5467a63dffa2dc9d9e069caf075d16fc33fdd4c3b01bfadae6433767d93" lcPubKeyHex = "b7a3c12dc0c8c748ab07525b701122b88bd78f600c76342d27f25e5f92444cde" loPrivKey = createobject("CkPrivateKey") // 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. llSuccess = loPrivKey.LoadEd25519(lcPrivKeyHex,lcPubKeyHex) if (llSuccess = .F.) then ? loPrivKey.LastErrorText release loPrivKey return endif // The data to be signed... loBd = createobject("CkBinData") loBd.AppendString("Message for Ed25519 signing","utf-8") loEddsa = createobject("CkEdDSA") lcHexSig = loEddsa.SignBdENC(loBd,"hexlower",loPrivKey) ? "signature = " + lcHexSig // The expected output is: 6dd355667fae4eb43c6e0ab92e870edb2de0a88cae12dbd8591507f584fe4912babff497f1b8edf9567d2483d54ddc6459bea7855281b7a246a609e3001a4e08 // Verify the signature.. loPubKey = createobject("CkPublicKey") llSuccess = loPubKey.LoadEd25519(lcPubKeyHex) if (llSuccess = .F.) then ? loPubKey.LastErrorText release loPrivKey release loBd release loEddsa release loPubKey return endif llBVerified = loEddsa.VerifyBdENC(loBd,lcHexSig,"hexlower",loPubKey) if (llBVerified = .F.) then ? loEddsa.LastErrorText ? "Failed to verify the signature." release loPrivKey release loBd release loEddsa release loPubKey return endif ? "The Ed25519 signature is verified!" release loPrivKey release loBd release loEddsa release loPubKey |
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