(VB.NET) PBES2 Password-Based Encryption

See more Encryption Examples

For more information, see https://www.chilkatsoft.com/explaining_pbes2_encryption.asp

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

Dim crypt As New Chilkat.Crypt2

' 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.

crypt.CryptAlgorithm = "pbes2"
crypt.PbesPassword = "mySecretPassword"

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

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

' Give it some salt:
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 PBES2:
crypt.HashAlgorithm = "sha256"

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

Dim plainText As String = "To be encrypted."

Dim encryptedText As String = crypt.EncryptStringENC(plainText)

Debug.WriteLine(encryptedText)

' Now decrypt:
Dim decryptedText As String = crypt.DecryptStringENC(encryptedText)

Debug.WriteLine(decryptedText)