(Go) PBES2 Password-Based Encryption (PBE)

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 PBES2, which ise based on the PBKDF2 function and an underlying block cipher such as RC2, DES, etc.

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

    crypt := chilkat.NewCrypt2()

    // Set properties for PBES2 encryption:

    crypt.SetCryptAlgorithm("pbes2")
    crypt.SetPbesPassword("mySecretPassword")

    // Set the underlying PBE algorithm (and key length):
    crypt.SetPbesAlgorithm("rc2")
    crypt.SetKeyLength(128)
    // Only required for the RC2 algorithm:
    crypt.SetRc2EffectiveKeyLength(128)

    // By definition, the block encryption algorithm (RC2 or whichever
    // was selected) will run in CBC mode.  Therefore, we need
    // an IV.  The IV is equal in length to the block size of the
    // algorithm.  RC2 has a block size of 8 bytes (regardless of
    // key length), so set the IV to some value that is 8 bytes 
    // in length:
    crypt.SetEncodedIV("0000000000000000","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.SetIterationCount(1024)

    // A hash algorithm needs to be set for PBES2:
    crypt.SetHashAlgorithm("sha1")

    // Indicate that the encrypted bytes should be returned
    // as a hex string:
    crypt.SetEncodingMode("hex")

    plainText := "To be encrypted."

    encryptedText := crypt.EncryptStringENC(plainText)

    fmt.Println(*encryptedText)

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

    fmt.Println(*decryptedText)

    crypt.DisposeCrypt2()