Dart Requires Chilkat v11.0.0+

RSA Decrypt using PEM

See more RSA Examples

This example demonstrates decryping RSA encrypted data that is base64 encoded. It uses a private key loaded from a PEM file. Dart

import 'package:chilkat/chilkat.dart';

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

  final rsa = CkRsa();

  final key = CkPrivateKey();

  // Load an RSA private key from an unencrypted PEM file:
  // (To load from an encrypted PEM file, call LoadEncryptedPemFile instead.)

  try {
    key.loadPemFile('qa_data/rsa/decryptTest/priv.pem');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Make the key available to the RSA object
  try {
    rsa.usePrivateKey(key);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final encryptedStr = 'pP9XFJEsGgxPNHEgNiLB5H5ksCOXDk/G49BPTog1jKLAhYofV4UTH5k2TOYiqRnDnKs8+8uPoN/IxdiGXvuYG8HRzN0HtkhoZO/AxeyaB9S7eddCUlT0Pl2PEB2yQ9HG5rM7jqYOD6MAM4cuX7hqT8fa8tbzJzmBwdfFDBz94bwQjULHiO+gklIBC4vhkXT4yjuvEjxTAKU6tJeZYkBooJNdS/vE5RZRpuF6bGZU41Qc17qFR+iReBq+9f8IMmw8WR8fMbOCaygOfFS1nw7JVsIMGsAIXS8rUaJ/2DfGPfQx5HCiVtTOreGYRUI3esAQjnvUCnavZyQgs53nl7e2aA==';

  rsa.encodingMode = 'base64';

  final usePrivateKey = true;
  final decryptedStr = rsa.decryptStringENC(encryptedStr, usePrivateKey);

  print('Decrypted:');
  print(decryptedStr);
}