(C#) Encrypt / Decrypt a File and Verify it has not Changed

Demonstrates how to encrypt and decrypt a file, and verify it has not changed.

Chilkat .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

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

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

crypt.CryptAlgorithm = "aes";
crypt.CipherMode = "cbc";
crypt.KeyLength = 128;
crypt.PaddingScheme = 0;

string ivHex = "000102030405060708090A0B0C0D0E0F";
crypt.SetEncodedIV(ivHex,"hex");

string keyHex = "00010203040506071011121314151617";
crypt.SetEncodedKey(keyHex,"hex");

string dataFile = "qa_data/zips/HBIQ040615300005.ZIP";
string outFile = "qa_output/HBIQ040615300005.enc";
string outFile2 = "qa_output/HBIQ040615300005.ZIP";

success = crypt.CkEncryptFile(dataFile,outFile);
success = crypt.CkDecryptFile(outFile,outFile2);

Chilkat.FileAccess fac = new Chilkat.FileAccess();
bool bEqual = fac.FileContentsEqual(dataFile,outFile2);
if (bEqual != true) {
    Debug.WriteLine("Decrypted file not equal to the original.");
}
else {
    Debug.WriteLine("Success.");
}