Chilkat Examples

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DataFlex Examples

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(DataFlex) ConvertToSignedPk

Demonstrates how to digitally sign MIME to create an "opaque" signature. The MIME is converted to an application/x-pkcs7-mime which is a PKCS7 signature that includes both the original MIME message and the signature. This is different than AddDetachedSignaturePk, where the signature is appended to the MIME. This example demonstrates how to use the certificate and its corresponding private key when they are stored in separate files -- a .cer for the certificate, and a .pem for the private key.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-9.5.0-win32.pkg

Procedure Test
    Handle hoMime
    Variant vCert
    Handle hoCert
    Boolean iSuccess
    Variant vPrivKey
    Handle hoPrivKey
    String sTemp1

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

    Get Create (RefClass(cComChilkatMime)) To hoMime
    If (Not(IsComObjectCreated(hoMime))) Begin
        Send CreateComObject of hoMime
    End

    // Load the certificate from a .cer file.
    Get Create (RefClass(cComChilkatCert)) To hoCert
    If (Not(IsComObjectCreated(hoCert))) Begin
        Send CreateComObject of hoCert
    End
    Get ComLoadFromFile Of hoCert "aaworkarea/myCert.cer" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoCert To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Load the private key from an encrypted PEM file.
    // (A private key can be loaded from other file formats also..)
    Get Create (RefClass(cComChilkatPrivateKey)) To hoPrivKey
    If (Not(IsComObjectCreated(hoPrivKey))) Begin
        Send CreateComObject of hoPrivKey
    End
    Get ComLoadEncryptedPemFile Of hoPrivKey "aaworkarea/myPrivateKey.pem" "myPassword" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoPrivKey To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComSetBodyFromPlainText Of hoMime "This is the plain-text MIME body." To iSuccess

    // Convert the MIME to application/x-pkcs7-mime, which
    // is PKCS7 containing both the original content and the signature.
    Get pvComObject of hoCert to vCert
    Get pvComObject of hoPrivKey to vPrivKey
    Get ComConvertToSignedPk Of hoMime vCert vPrivKey To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoMime To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Save the S/MIME to a file.
    Get ComSaveMime Of hoMime "aaworkarea/opaqueSignedMime.txt" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoMime To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Showln "success!"


End_Procedure

 

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