Visual FoxPro
Create ICP-Brasil Compliant CMS Signature

Demonstrates how to create a .p7s signature that contains a data file, which in this case is a PDF. The .p7s will be compliant with the ICP-Brazil Digital Signature Standard.
The .p7s file created by this example can be verified at ICP-Brasil Online Verifier
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LOCAL lnSuccess
LOCAL loCrypt
LOCAL lcInFile
LOCAL loBd
LOCAL loCert
LOCAL loJsonSigningAttrs

lnSuccess = 0

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

*  ------------------------------------------------------------------------------------------------------
*  Note: This example creates a CMS signature (.p7s) that contains the PDF.
*  It is different than signing a PDF.  To sign a PDF where the resulting PDF contains the CMS signature,
*  see this example:  Sign PDF for ICP-Brasil
*  ------------------------------------------------------------------------------------------------------
loCrypt = CreateObject('Chilkat.Crypt2')

*  Any type of file can be signed.  It doesn't have to be a PDF.
lcInFile = "qa_data/pdf/helloWorld.pdf"

loBd = CreateObject('Chilkat.BinData')
lnSuccess = loBd.LoadFile(lcInFile)
IF (lnSuccess = 0) THEN
    ? "Failed to load " + lcInFile
    RELEASE loCrypt
    RELEASE loBd
    CANCEL
ENDIF

*  We'll be using a certificate w/ private key stored on a smartcard for signing.
loCert = CreateObject('Chilkat.Cert')

*  If the smartcard or token requires a PIN, we can set it here to avoid the dialog...
loCert.SmartCardPin = "000000"

lnSuccess = loCert.LoadFromSmartcard("")
IF (lnSuccess <> 1) THEN
    ? loCert.LastErrorText
    RELEASE loCrypt
    RELEASE loBd
    RELEASE loCert
    CANCEL
ENDIF

*  Tell the crypt component to use this cert.
lnSuccess = loCrypt.SetSigningCert(loCert)
IF (lnSuccess <> 1) THEN
    ? loCrypt.LastErrorText
    RELEASE loCrypt
    RELEASE loBd
    RELEASE loCert
    CANCEL
ENDIF

*  Set properties for signing...
loCrypt.HashAlgorithm = "sha256"

loJsonSigningAttrs = CreateObject('Chilkat.JsonObject')
loJsonSigningAttrs.UpdateInt("contentType",1)
loJsonSigningAttrs.UpdateInt("signingTime",1)
loJsonSigningAttrs.UpdateInt("messageDigest",1)
loJsonSigningAttrs.UpdateBool("signingCertificateV2",1)

*  Listed here are the currently existing profiles. (Chilkat will add additional ICP Brasil policy profiles in future versions as new ones are created.)
*  See https://www.gov.br/iti/pt-br/assuntos/repositorio/artefatos-de-assinatura-digital for more information.
*  
*  PA_AD_RA --> 2.16.76.1.7.1.5.1
*  PA_AD_RA_v1_1 --> 2.16.76.1.7.1.5.1.1
*  PA_AD_RA_v1_2 --> 2.16.76.1.7.1.5.1.2
*  PA_AD_RA_v2_0 --> 2.16.76.1.7.1.5.2
*  PA_AD_RA_v2_1 --> 2.16.76.1.7.1.5.2.1
*  PA_AD_RA_v2_2 --> 2.16.76.1.7.1.5.2.2
*  PA_AD_RA_v2_3 --> 2.16.76.1.7.1.5.2.3
*  PA_AD_RA_v2_4 --> 2.16.76.1.7.1.5.2.4
*  PA_AD_RB --> 2.16.76.1.7.1.1.1
*  PA_AD_RB_v1_1 --> 2.16.76.1.7.1.1.1.1
*  PA_AD_RB_v2_0 --> 2.16.76.1.7.1.1.2
*  PA_AD_RB_v2_1 --> 2.16.76.1.7.1.1.2.1
*  PA_AD_RB_v2_2 --> 2.16.76.1.7.1.1.2.2
*  PA_AD_RB_v2_3 --> 2.16.76.1.7.1.1.2.3
*  PA_AD_RC --> 2.16.76.1.7.1.4.1
*  PA_AD_RC_v1_1 --> 2.16.76.1.7.1.4.1.1
*  PA_AD_RC_v2_0 --> 2.16.76.1.7.1.4.2
*  PA_AD_RC_v2_1 --> 2.16.76.1.7.1.4.2.1
*  PA_AD_RC_v2_2 --> 2.16.76.1.7.1.4.2.2
*  PA_AD_RC_v2_3 --> 2.16.76.1.7.1.4.2.3
*  PA_AD_RT --> 2.16.76.1.7.1.2.1
*  PA_AD_RT_v1_1 --> 2.16.76.1.7.1.2.1.1
*  PA_AD_RT_v2_0 --> 2.16.76.1.7.1.2.2
*  PA_AD_RT_v2_1 --> 2.16.76.1.7.1.2.2.1
*  PA_AD_RT_v2_2 --> 2.16.76.1.7.1.2.2.2
*  PA_AD_RT_v2_3 --> 2.16.76.1.7.1.2.2.3
*  PA_AD_RV --> 2.16.76.1.7.1.3.1
*  PA_AD_RV_v1_1 --> 2.16.76.1.7.1.3.1.1
*  PA_AD_RV_v2_0 --> 2.16.76.1.7.1.3.2
*  PA_AD_RV_v2_1 --> 2.16.76.1.7.1.3.2.1
*  PA_AD_RV_v2_2 --> 2.16.76.1.7.1.3.2.2
*  PA_AD_RV_v2_3 --> 2.16.76.1.7.1.3.2.3

*  Set the policy OID and the profile name
loJsonSigningAttrs.UpdateString("policyId.id","2.16.76.1.7.1.1.2.3")
loJsonSigningAttrs.UpdateString("policyId.profile","PA_AD_RB_v2_3")

loCrypt.SigningAttributes = loJsonSigningAttrs.Emit()

*  The Brazil government validator requires the ASN.1 data to be in "constructed octets" form..
loCrypt.UncommonOptions = "UseConstructedOctets,OmitAlgorithmIdNull"
loCrypt.IncludeCertChain = 0

*  Sign. 
lnSuccess = loCrypt.OpaqueSignBd(loBd)
IF (lnSuccess = 0) THEN
    ? loCrypt.LastErrorText
    RELEASE loCrypt
    RELEASE loBd
    RELEASE loCert
    RELEASE loJsonSigningAttrs
    CANCEL
ENDIF

*  Save to a .p7s
lnSuccess = loBd.WriteFile("qa_output/helloWorld.pdf.p7s")

? "Success"

RELEASE loCrypt
RELEASE loBd
RELEASE loCert
RELEASE loJsonSigningAttrs