Dart

Load RSA Public Key from Hex Modulus and Exponent

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Load an RSA public key from a hex modulus and exponent. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // Load a 128-byte (1024-bit) modulus + exponent into a Chilkat public key object..
  final modulus = 'BF5F4AF9A018B5F324A0C10448C0D3248D9BE78967FDC551A27876AC5789ADCBA8245D3D942AE3799563D895DA801E765D225A54FA15DAB2C4731DD817DCF94A9AD62197074C2349442093A206234BF3747F0E88AA6F538355684CC1FB26FCE029C9050A1DAF9F507C2BABF6EFC9FB16320C8036721BE0279FBB76122C41E429';

  final exponent = '00000003';

  // We'll need to re-encode from hex to base64..
  final bdModulus = CkBinData();
  bdModulus.appendEncoded(modulus, 'hex');
  final bdExponent = CkBinData();
  bdExponent.appendEncoded(exponent, 'hex');

  final xml = CkXml();
  xml.tag = 'RsaKeyValue';
  xml.newChild2('Modulus', bdModulus.getEncoded('base64'));
  xml.newChild2('Exponent', bdExponent.getEncoded('base64'));

  // Now load into the pubkey object..
  final pubkey = CkPublicKey();
  try {
    pubkey.loadFromString(xml.getXml());
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Success.');
}