(Swift) PBES2 Password-Based Encryption

See more Encryption Examples

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

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

    let crypt = CkoCrypt2()!

    // 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", encoding: "hex")

    // Give it some salt:
    crypt.setEncodedSalt("0102030405060708", encoding: "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"

    var plainText: String? = "To be encrypted."

    var encryptedText: String? = crypt.encryptStringENC(plainText)

    print("\(encryptedText!)")

    // Now decrypt:
    var decryptedText: String? = crypt.decryptStringENC(encryptedText)

    print("\(decryptedText!)")

}