Lianja

PBES2 Password-Based Encryption

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Demonstrates PBES2 encryption Lianja

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

loCrypt = createobject("CkCrypt2")

// Set properties for PBES2 encryption:

// When the encryption algorithm is set to "pbes2",
// Chilkat will automatically derive the actual secret key using PBKDF2 and
// the specified paramters: password, salt, iteration count, hash function, and desired key length.

loCrypt.CryptAlgorithm = "pbes2"
loCrypt.PbesPassword = "mySecretPassword"

// Set the underlying PBE algorithm (and key length):
loCrypt.PbesAlgorithm = "aes"
loCrypt.KeyLength = 256

loCrypt.SetEncodedIV("000102030405060708090A0B0C0D0E0F","hex")

// Give it some salt:
loCrypt.SetEncodedSalt("0102030405060708","hex")

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

// A hash algorithm needs to be set for PBES2:
loCrypt.HashAlgorithm = "sha256"

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

lcPlainText = "To be encrypted."

lcEncryptedText = loCrypt.EncryptStringENC(lcPlainText)

? lcEncryptedText

// Now decrypt:
lcDecryptedText = loCrypt.DecryptStringENC(lcEncryptedText)

? lcDecryptedText


release loCrypt