Visual FoxPro

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*...

Visual FoxPro

LOCAL lnSuccess
LOCAL loCrypt
LOCAL loPem
LOCAL loPrivkey
LOCAL loCert
LOCAL loCertFromP12

lnSuccess = 0

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

loCrypt = CreateObject('Chilkat.Crypt2')

* Load the PEM containing cert + private key.
loPem = CreateObject('Chilkat.Pem')
lnSuccess = loPem.LoadPemFile("qa_data/pem/myPem.pem","password")
IF (lnSuccess = 0) THEN
    ? loPem.LastErrorText
    RELEASE loCrypt
    RELEASE loPem
    CANCEL
ENDIF

loPrivkey = CreateObject('Chilkat.PrivateKey')
lnSuccess = loPem.PrivateKeyAt(0,loPrivkey)
IF (lnSuccess = 0) THEN
    ? loPem.LastErrorText
    RELEASE loCrypt
    RELEASE loPem
    RELEASE loPrivkey
    CANCEL
ENDIF

loCert = CreateObject('Chilkat.Cert')
lnSuccess = loPem.CertAt(0,loCert)
IF (lnSuccess = 0) THEN
    ? loPem.LastErrorText
    RELEASE loCrypt
    RELEASE loPem
    RELEASE loPrivkey
    RELEASE loCert
    CANCEL
ENDIF

lnSuccess = loCrypt.SetSigningCert2(loCert,loPrivkey)
IF (lnSuccess = 0) THEN
    ? loCrypt.LastErrorText
    RELEASE loCrypt
    RELEASE loPem
    RELEASE loPrivkey
    RELEASE loCert
    CANCEL
ENDIF

* Alternatively, we could use a .pfx/.p12 file.
* (Chilkat also supports other formats/sources for cert/private keys...)
loCertFromP12 = CreateObject('Chilkat.Cert')
lnSuccess = loCertFromP12.LoadPfxFile("qa_data/p12/myP12.p12","password")
IF (lnSuccess = 0) THEN
    ? loCertFromP12.LastErrorText
    RELEASE loCrypt
    RELEASE loPem
    RELEASE loPrivkey
    RELEASE loCert
    RELEASE loCertFromP12
    CANCEL
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.
lnSuccess = loCrypt.SetSigningCert(loCertFromP12)
IF (lnSuccess = 0) THEN
    ? loCrypt.LastErrorText
    RELEASE loCrypt
    RELEASE loPem
    RELEASE loPrivkey
    RELEASE loCert
    RELEASE loCertFromP12
    CANCEL
ENDIF

* Create the opaque signature (PKCS7 binary DER that contains both the signature and original file data).
lnSuccess = loCrypt.CreateP7M("qa_data/infile.anything","qa_output/outfile.p7m")
IF (lnSuccess = 0) THEN
    ? loCrypt.LastErrorText
    RELEASE loCrypt
    RELEASE loPem
    RELEASE loPrivkey
    RELEASE loCert
    RELEASE loCertFromP12
    CANCEL
ENDIF

? "Success."

RELEASE loCrypt
RELEASE loPem
RELEASE loPrivkey
RELEASE loCert
RELEASE loCertFromP12