Xbase++ Requires Chilkat v11.0.0+

Duplicate OpensSSL to Sign File and Output Binary DER

See more OpenSSL Examples

This example duplicates the following:

openssl smime -sign -in INPUT.xml -signer SIGN.PEM -passin pass:MYPASS -outform der -binary -nodetach -out SIGNED.P7M

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 can be any type of file: XML, PDF, JPG, ... *anything*...

Xbase++

LOCAL nSuccess
LOCAL oCrypt
LOCAL oPem
LOCAL oPrivkey
LOCAL oCert
LOCAL oCertFromP12

nSuccess := 0

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

oCrypt := CreateObject("Chilkat.Crypt2")

//  Load the PEM containing cert + private key.
oPem := CreateObject("Chilkat.Pem")
nSuccess := oPem:LoadPemFile("qa_data/pem/myPem.pem", "password")
IF (nSuccess == 0)
    ? oPem:LastErrorText
    oCrypt:destroy()
    oPem:destroy()
    RETURN
ENDIF

oPrivkey := CreateObject("Chilkat.PrivateKey")
nSuccess := oPem:PrivateKeyAt(0, oPrivkey)
IF (nSuccess == 0)
    ? oPem:LastErrorText
    oCrypt:destroy()
    oPem:destroy()
    oPrivkey:destroy()
    RETURN
ENDIF

oCert := CreateObject("Chilkat.Cert")
nSuccess := oPem:CertAt(0, oCert)
IF (nSuccess == 0)
    ? oPem:LastErrorText
    oCrypt:destroy()
    oPem:destroy()
    oPrivkey:destroy()
    oCert:destroy()
    RETURN
ENDIF

nSuccess := oCrypt:SetSigningCert2(oCert, oPrivkey)
IF (nSuccess == 0)
    ? oCrypt:LastErrorText
    oCrypt:destroy()
    oPem:destroy()
    oPrivkey:destroy()
    oCert:destroy()
    RETURN
ENDIF

//  Alternatively, we could use a .pfx/.p12 file.
//  (Chilkat also supports other formats/sources for cert/private keys...)
oCertFromP12 := CreateObject("Chilkat.Cert")
nSuccess := oCertFromP12:LoadPfxFile("qa_data/p12/myP12.p12", "password")
IF (nSuccess == 0)
    ? oCertFromP12:LastErrorText
    oCrypt:destroy()
    oPem:destroy()
    oPrivkey:destroy()
    oCert:destroy()
    oCertFromP12:destroy()
    RETURN
ENDIF

//  The certificate, when loaded from a .pfx/.p12, will automatically 
//  include the associated private key, assuming it's present in the .p12.
//  We don't have to explicitly provide the private key as in the
//  lines of code above that use the PEM file.
nSuccess := oCrypt:SetSigningCert(oCertFromP12)
IF (nSuccess == 0)
    ? oCrypt:LastErrorText
    oCrypt:destroy()
    oPem:destroy()
    oPrivkey:destroy()
    oCert:destroy()
    oCertFromP12:destroy()
    RETURN
ENDIF

//  Create the opaque signature (PKCS7 binary DER that contains both the signature and original file data).
nSuccess := oCrypt:CreateP7M("qa_data/infile.anything", "qa_output/outfile.p7m")
IF (nSuccess == 0)
    ? oCrypt:LastErrorText
    oCrypt:destroy()
    oPem:destroy()
    oPrivkey:destroy()
    oCert:destroy()
    oCertFromP12:destroy()
    RETURN
ENDIF

? "Success."

oCrypt:destroy()
oPem:destroy()
oPrivkey:destroy()
oCert:destroy()
oCertFromP12:destroy()