Chilkat Examples

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DataFlex Examples

ASN.1
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curl
eBay

 

 

 

(DataFlex) ARC4 Encryption (ARCFOUR)

ARC4 (ARCFOUR) encryption. The Chilkat encryption component supports the ARC4 streaming encryption algorithm.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-9.5.0-win32.pkg

Procedure Test
    Handle hoCrypt
    Boolean iSuccess
    String sKeyHex
    String sEncStr
    String sDecStr

    Get Create (RefClass(cComChilkatCrypt2)) To hoCrypt
    If (Not(IsComObjectCreated(hoCrypt))) Begin
        Send CreateComObject of hoCrypt
    End

    Get ComUnlockComponent Of hoCrypt "Anything for 30-day trial" To iSuccess
    If (iSuccess <> True) Begin
        Showln "Crypt component unlock failed"
        Procedure_Return
    End

    //  Set the encryption algorithm = "arc4"
    Set ComCryptAlgorithm Of hoCrypt To "arc4"

    //  KeyLength may range from 1 byte to 256 bytes.
    //  (i.e. 8 bits to 2048 bits)
    //  ARC4 key sizes are typically in the range of
    //  40 to 128 bits.
    //  The KeyLength property is specified in bits:
    Set ComKeyLength Of hoCrypt To 128

    //  Note: The PaddingScheme and CipherMode properties
    //  do not apply w/ ARC4.  ARC4 does not encrypt in blocks --
    //  it is a streaming encryption algorithm. The number of output bytes
    //  is exactly equal to the number of input bytes.

    //  EncodingMode specifies the encoding of the output for
    //  encryption, and the input for decryption.
    //  It may be "hex", "url", "base64", or "quoted-printable".
    Set ComEncodingMode Of hoCrypt To "hex"

    //  Note: ARC4 does not utilize initialization vectors.  IV's only
    //  apply to block encryption algorithms.

    //  The secret key must equal the size of the key.
    //  For 128-bit encryption, the binary secret key is 16 bytes.
    Move "000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F" To sKeyHex
    Send ComSetEncodedKey To hoCrypt sKeyHex "hex"

    //  Encrypt a string...
    //  The output length is exactly equal to the input.  In this
    //  example, the input string is 44 chars (ANSI bytes) so the
    //  output is 44 bytes -- and when hex encoded results in an
    //  88-char string (2 chars per byte for the hex encoding).
    Get ComEncryptStringENC Of hoCrypt "The quick brown fox jumps over the lazy dog." To sEncStr
    Showln sEncStr

    //  Now decrypt:
    Get ComDecryptStringENC Of hoCrypt sEncStr To sDecStr
    Showln sDecStr


End_Procedure

 

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