(DataFlex) Duplicate OpensSSL to Encrypt a Signed File

This example duplicates the following:

openssl smime -encrypt –in SIGNED.P7M –outform der –binary –des3 -out ENCRYPTED.ENC OTHERPARTYCERTIFICATE.PEM

Note: Although "smime" is the OpenSSL command, it's not actually producing S/MIME. The arguments "-outform der -binary" indicates that the output is binary DER (i.e. the PKCS7 binary signature). The input file (in this case) is a .p7m opaque signature, but it can be any type of file. There is nothing special about the fact that the input is .p7m. It is treated exactly the same as any other type of file. From the standpoint of encryption, the input file is just a bunch of bytes that needs to be encrypted and emitted to a PKCS7 binary DER output.

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

Use ChilkatAx-win32.pkg

Procedure Test
    Handle hoCrypt
    Variant vCert
    Handle hoCert
    Boolean iSuccess
    String sTemp1

    // 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

    // PKCS7 encryption only requires the certificate (which contains the public key).
    // Load the certificate..

    // The cert.LoadFromFile method detects the file format.  You may load any type of file
    // containing a certificate..
    Get Create (RefClass(cComChilkatCert)) To hoCert
    If (Not(IsComObjectCreated(hoCert))) Begin
        Send CreateComObject of hoCert
    End
    Get ComLoadFromFile Of hoCert "qa_data/certs/otherPartyCert.pem" To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoCert To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Indicate that we want Public Key Infrastructure (PKI) encryption.
    Set ComCryptAlgorithm Of hoCrypt To "pki"

    // The desired encryption is "-des3", so choose "3des" for the underlying PKCS7 symmetric encryption:
    Set ComPkcs7CryptAlg Of hoCrypt To "3des"

    // Indicate the cert/public key to use for encryption:
    Get pvComObject of hoCert to vCert
    Get ComSetEncryptCert Of hoCrypt vCert To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoCrypt To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Call a crypt.Encrypt* methods to encrypt to/from memory sources (i.e. strings or bytes)
    // or.. call CkEncryptFile to do file-to-file encryption.
    // In this case the file to be encrypted is "signed.p7m", but it could be any type of file..
    Get ComCkEncryptFile Of hoCrypt "somedir/signed.p7m" "qa_output/encrypted.enc" To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoCrypt To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Showln "Success."


End_Procedure