rsaSign function
Implementation
Uint8List rsaSign(RSAPrivateKey privateKey, Uint8List dataToSign) {
final signer = RSASigner(SHA256Digest(), '0609608648016503040201');
signer.init(
true, PrivateKeyParameter<RSAPrivateKey>(privateKey)); // true=sign
final sig = signer.generateSignature(dataToSign);
return sig.bytes;
}