(DataFlex) RSA Encrypt and OpenSSL Decrypt

Demonstrates how to use Chilkat to RSA encrypt, and then use OpenSSL to decrypt.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-win32.pkg

Procedure Test
    Handle hoRsa
    Boolean iSuccess
    Variant vPrivKey
    Handle hoPrivKey
    String sPlainText
    Boolean iBUsePrivateKey
    String sEncryptedStr
    Handle hoBd

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

    Get Create (RefClass(cComChilkatRsa)) To hoRsa
    If (Not(IsComObjectCreated(hoRsa))) Begin
        Send CreateComObject of hoRsa
    End

    Get ComGenerateKey Of hoRsa 2048 To iSuccess

    Get ComExportPrivateKeyObj Of hoRsa To vPrivKey
    If (IsComObject(vPrivKey)) Begin
        Get Create (RefClass(cComChilkatPrivateKey)) To hoPrivKey
        Set pvComObject Of hoPrivKey To vPrivKey
    End
    Get ComSavePkcs8PemFile Of hoPrivKey "qa_output/privKey.pem" To iSuccess
    Send Destroy of hoPrivKey

    Set ComEncodingMode Of hoRsa To "base64"
    Move "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz01234567890" To sPlainText
    Move False To iBUsePrivateKey
    Get ComEncryptStringENC Of hoRsa sPlainText iBUsePrivateKey To sEncryptedStr

    Get Create (RefClass(cComChilkatBinData)) To hoBd
    If (Not(IsComObjectCreated(hoBd))) Begin
        Send CreateComObject of hoBd
    End
    Get ComAppendEncoded Of hoBd sEncryptedStr "base64" To iSuccess
    Get ComWriteFile Of hoBd "qa_output/enc.dat" To iSuccess

    // The OpenSSL command to decrypt is:
    // openssl pkeyutl -in enc.dat -inkey privKey.pem -keyform PEM -pkeyopt rsa_padding_mode:pkcs1 -decrypt

    Showln "OK"


End_Procedure