Xbase++

FatturaPA XML Invoice Sign+Encrypt to P7M

See more Digital Signatures Examples

Demonstrates how to create a CAdES BES signed + encrypted invoice.xml.p7m for the Italian FatturaPA exchange system. Xbase++

LOCAL nSuccess
LOCAL oCrypt
LOCAL cPfxPath
LOCAL cPfxPassword
LOCAL oCert
LOCAL oJsonSignedAttrs
LOCAL cInFile
LOCAL cSigFile
LOCAL oEncryptCert

nSuccess := 0

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

oCrypt := CreateObject("Chilkat.Crypt2")

//  Use a digital certificate and private key from a PFX file (.pfx or .p12).
cPfxPath := "qa_data/pfx/cert_test123.pfx"
cPfxPassword := "test123"

oCert := CreateObject("Chilkat.Cert")
nSuccess := oCert:LoadPfxFile(cPfxPath, cPfxPassword)
IF (nSuccess == 0)
    ? oCert:LastErrorText
    oCrypt:destroy()
    oCert:destroy()
    RETURN
ENDIF

//  Provide the signing cert (with associated private key).
nSuccess := oCrypt:SetSigningCert(oCert)
IF (nSuccess == 0)
    ? oCrypt:LastErrorText
    oCrypt:destroy()
    oCert:destroy()
    RETURN
ENDIF

//  Indicate that SHA-256 should be used.
oCrypt:HashAlgorithm := "sha256"

//  Specify the signed attributes to be included.
//  (This is what makes it CAdES-BES compliant.)
oJsonSignedAttrs := CreateObject("Chilkat.JsonObject")
oJsonSignedAttrs:UpdateInt("contentType", 1)
oJsonSignedAttrs:UpdateInt("signingTime", 1)
oJsonSignedAttrs:UpdateInt("messageDigest", 1)
oJsonSignedAttrs:UpdateInt("signingCertificateV2", 1)
oCrypt:SigningAttributes := oJsonSignedAttrs:Emit()

cInFile := "qa_data/xml/IT01234567890_11002.xml"
cSigFile := "qa_data/fatturapa/signed.p7m"

//  Create the CAdES-BES signature, which contains the original data.
nSuccess := oCrypt:CreateP7M(cInFile, cSigFile)
IF (nSuccess == 0)
    ? oCrypt:LastErrorText
    oCrypt:destroy()
    oCert:destroy()
    oJsonSignedAttrs:destroy()
    RETURN
ENDIF

//  Now we'll encrypt what was signed using FatturaPA's certificate (from a PEM file)
oEncryptCert := CreateObject("Chilkat.Cert")
nSuccess := oEncryptCert:LoadFromFile("qa_data/certs/fatturapa_cert.pem")
IF (nSuccess == 0)
    ? oEncryptCert:LastErrorText
    oCrypt:destroy()
    oCert:destroy()
    oJsonSignedAttrs:destroy()
    oEncryptCert:destroy()
    RETURN
ENDIF

oCrypt:CryptAlgorithm := "pki"

nSuccess := oCrypt:SetEncryptCert(oEncryptCert)
IF (nSuccess == 0)
    ? oCrypt:LastErrorText
    oCrypt:destroy()
    oCert:destroy()
    oJsonSignedAttrs:destroy()
    oEncryptCert:destroy()
    RETURN
ENDIF

//  Indicate the underlying bulk encryption algorithm to be used:
oCrypt:Pkcs7CryptAlg := "aes"
oCrypt:KeyLength := 128

//  There's one last option that could be set.  If is the RSA encryption encryption/padding scheme. 
//  By default, RSAES_PKCS1-V1_5 is used.  If desired, the OaepPadding property could be set to 1 to
//  use RSAES_OAEP.  (We'll leave it set at the default value of 0)
oCrypt:OaepPadding := 0

//  Everything is specified.  Encrypt the .p7m to create a new .p7m (which adds a layer of encryption around the opaque signature).
//  The output is PKCS7 in binary DER format.
nSuccess := oCrypt:CkEncryptFile(cSigFile, "qa_output/signed_and_encrypted.p7m")
IF (nSuccess == 0)
    ? oCrypt:LastErrorText
    oCrypt:destroy()
    oCert:destroy()
    oJsonSignedAttrs:destroy()
    oEncryptCert:destroy()
    RETURN
ENDIF

? "Success."

oCrypt:destroy()
oCert:destroy()
oJsonSignedAttrs:destroy()
oEncryptCert:destroy()