DataFlex

Duplicate OpensSSL Command that Decrypts Binary DER

See more OpenSSL Examples

This example duplicates the following:

openssl smime -decrypt -in INPUT_FILE -inform der -binary -out OUTPUT_FILE -recip PEM_CERT_AND_KEY -passin pass:PRIVKEY_PASSWORD

Note: Although "smime" is the OpenSSL command, we're not really dealing with S/MIME. The arguments "-inform der -binary" indicate that the input is simply the binary DER (i.e. the PKCS7 binary encrypted object). The output can be any type of file (whatever was encrypted).

DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoCrypt
    Handle hoPem
    Variant vPrivkey
    Handle hoPrivkey
    Variant vCert
    Handle hoCert
    String sTemp1

    Move False To iSuccess

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

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

    Set ComCryptAlgorithm Of hoCrypt To "pki"

    Get Create (RefClass(cComChilkatPem)) To hoPem
    If (Not(IsComObjectCreated(hoPem))) Begin
        Send CreateComObject of hoPem
    End
    Get ComLoadPemFile Of hoPem "qa_data/pem/myPem.pem" "password" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoPem To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatPrivateKey)) To hoPrivkey
    If (Not(IsComObjectCreated(hoPrivkey))) Begin
        Send CreateComObject of hoPrivkey
    End
    Get pvComObject of hoPrivkey to vPrivkey
    Get ComPrivateKeyAt Of hoPem 0 vPrivkey To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoPem To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatCert)) To hoCert
    If (Not(IsComObjectCreated(hoCert))) Begin
        Send CreateComObject of hoCert
    End
    Get pvComObject of hoCert to vCert
    Get ComCertAt Of hoPem 0 vCert To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoPem To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get pvComObject of hoCert to vCert
    Get pvComObject of hoPrivkey to vPrivkey
    Get ComSetDecryptCert2 Of hoCrypt vCert vPrivkey To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoCrypt To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComCkDecryptFile Of hoCrypt "qa_data/infile.enc" "qa_output/outfile.dat" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoCrypt To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Showln "Success."


End_Procedure