(C# UWP/WinRT) Encrypt / Decrypt Secure Strings

Demonstrates how to use the EncryptSecureENC and DecryptSecureENC methods to encrypt/decrypt secure strings. These methods were added in Chilkat v9.5.0.71 (released January 2018).

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

//  This example requires the Chilkat Crypt API to have been previously unlocked.
//  See Unlock Chilkat Crypt for sample code.

//  Load the secure string with some text.
Chilkat.SecureString secStr1 = new Chilkat.SecureString();
bool success = secStr1.LoadFile("qa_data/txt/helloWorld.txt","utf-8");
if (success != true) {
    Debug.WriteLine("Failed to load helloWorld.txt");
    return;
}

Chilkat.Crypt2 crypt = new Chilkat.Crypt2();

crypt.CryptAlgorithm = "aes";
crypt.CipherMode = "cbc";
crypt.KeyLength = 128;
crypt.SetEncodedKey("000102030405060708090A0B0C0D0E0F","hex");
crypt.SetEncodedIV("000102030405060708090A0B0C0D0E0F","hex");
crypt.EncodingMode = "base64";

//  Return the base64 encoded encrypted contents of secStr1.
string encryptedStr = crypt.EncryptSecureENC(secStr1);
Debug.WriteLine("Encrypted string: " + encryptedStr);

//  Output:
//  Encrypted string: qiq+IFhcjTkEIkZyf31V/g==

//  Decrypt to secStr2:
Chilkat.SecureString secStr2 = new Chilkat.SecureString();
crypt.DecryptSecureENC(encryptedStr,secStr2);

//  Access the contents of secStr2
Debug.WriteLine("Decrypted string: " + secStr2.Access());

//  Output:
//  Decrypted string: Hello World!