Ruby Requires Chilkat v11.0.0+

SII Chile - FRMA Signature Computation and Add to XML

See more XML Digital Signatures Examples

Compute the FRMA signature of a <DA> element enclosed inside a <CAF> element of the XML to be signed. Ruby

require 'chilkat'

success = false

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

#  Also see:  Compute the FRMT Signature and Add to XML

xml = Chilkat::CkXml.new()

#  Load the unsigned XML that contains the following:

#  <DTE version="1.0">
#    <Documento ID="F60T33">
#          <TED version="1.0">
#              <DD>
#  		...
#                  <CAF version="1.0">
#                      <DA>
#  			...
#                      </DA>
#  			... The FRMA will be added here ...
#                  </CAF>
#                  ...
#              </DD>
#              ... The FRMT will be added here in another example ...
#          </TED>
#    </Documento>
#  </DTE>

success = xml.LoadXmlFile("qa_data/xml_dsig/sii_cl/test_0.xml")
if (success == false)
    print "Failed to load initial XML file." + "\n";
    exit
end

#  Get a reference to the "DA" element
# daXml is a CkXml
daXml = xml.FindChild("Documento|TED|DD|CAF|DA")
if (xml.get_LastMethodSuccess() == false)
    print "Failed to find DA element" + "\n";
    exit
end

#   We need to get the "flattened" DA XML where:
#     - No whitespace between elements.
#     - The 5 pre-defined entities are converted.
#     - The text is encoded in the ISO-8859-1 character set (Latin-1), 
sbFlattened = Chilkat::CkStringBuilder.new()
daXml.put_EmitCompact(true)
daXml.put_EmitXmlDecl(false)
daXml.GetXmlSb(sbFlattened)

#  Compute the SHA-1 message digest of the iso-8859-1 byte representation, 
#  and sign it with our RSA private key, getting the result in base64 format.

privKey = Chilkat::CkPrivateKey.new()
success = privKey.LoadAnyFormatFile("qa_data/rsa/rsaPrivKey_pkcs8.pem","")
if (success == false)
    print privKey.lastErrorText() + "\n";
    exit
end

rsa = Chilkat::CkRsa.new()
rsa.UsePrivateKey(privKey)

rsa.put_EncodingMode("base64")
rsa.put_Charset("iso-8859-1")
sig = rsa.signStringENC(sbFlattened.getAsString(),"sha1")

#  Add the FRMA signature element to the XML.
xml.UpdateChildContent("Documento|TED|DD|CAF|FRMA",sig)
xml.UpdateAttrAt("Documento|TED|DD|CAF|FRMA",true,"algoritmo","SHA1withRSA")

#  See what we have:
xml.put_EmitCompact(false)
xml.put_EmitXmlDecl(true)
print xml.getXml() + "\n";

xml.SaveXml("qa_data/xml_dsig/sii_cl/test_1.xml")