C#

PBES1 Password-Based Encryption (PBE)

See more Encryption Examples

Demonstrates how to implement password-based encryption according to the PKCS #5 v2.0: Password-Based Cryptography Standard (published by RSA Laboratories). This example uses PBES1, which ise based on the PBKDF1 function and an underlying block cipher such as RC2, DES, etc. C#

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

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

//  Set properties for PBES1 encryption:

crypt.CryptAlgorithm = "pbes1";
crypt.PbesPassword = "mySecretPassword";

//  Set the underlying PBE algorithm (and key length):
//  For PBES1, the underlying algorithm must be either
//  56-bit DES or 64-bit RC2 
//  (this is according to the PKCS#5 specifications at
//  http://www.rsa.com/rsalabs/node.asp?id=2127   )
crypt.PbesAlgorithm = "rc2";
crypt.KeyLength = 64;

//  The salt for PBKDF1 is always 8 bytes:
crypt.SetEncodedSalt("0102030405060708","hex");

//  A higher iteration count makes the algorithm more
//  computationally expensive and therefore exhaustive
//  searches (for breaking the encryption) is more difficult:
crypt.IterationCount = 1024;

//  A hash algorithm needs to be set for PBES1:
crypt.HashAlgorithm = "sha1";

//  Indicate that the encrypted bytes should be returned
//  as a hex string:
crypt.EncodingMode = "hex";

string plainText = "To be encrypted.";

string encryptedText = crypt.EncryptStringENC(plainText);

Debug.WriteLine(encryptedText);

//  Now decrypt:
string decryptedText = crypt.DecryptStringENC(encryptedText);

Debug.WriteLine(decryptedText);