2 Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #include <libxml++/libxml++.h>
21 #include <xmlsec/xmldsig.h>
22 #include <xmlsec/dl.h>
23 #include <xmlsec/app.h>
24 #include <libcxml/cxml.h>
26 #include "exceptions.h"
30 using boost::shared_ptr;
31 using namespace libdcp;
33 /** @param signer_key Filename of private key to sign with */
35 Signer::sign (xmlpp::Element* parent, bool interop) const
37 add_signer (parent, "dsig");
39 xmlpp::Element* signature = parent->add_child("Signature", "dsig");
41 xmlpp::Element* signed_info = signature->add_child ("SignedInfo", "dsig");
42 signed_info->add_child("CanonicalizationMethod", "dsig")->set_attribute ("Algorithm", "http://www.w3.org/TR/2001/REC-xml-c14n-20010315");
45 signed_info->add_child("SignatureMethod", "dsig")->set_attribute("Algorithm", "http://www.w3.org/2000/09/xmldsig#rsa-sha1");
47 signed_info->add_child("SignatureMethod", "dsig")->set_attribute("Algorithm", "http://www.w3.org/2001/04/xmldsig-more#rsa-sha256");
50 xmlpp::Element* reference = signed_info->add_child("Reference", "dsig");
51 reference->set_attribute ("URI", "");
53 xmlpp::Element* transforms = reference->add_child("Transforms", "dsig");
54 transforms->add_child("Transform", "dsig")->set_attribute (
55 "Algorithm", "http://www.w3.org/2000/09/xmldsig#enveloped-signature"
58 reference->add_child("DigestMethod", "dsig")->set_attribute("Algorithm", "http://www.w3.org/2000/09/xmldsig#sha1");
59 /* This will be filled in by the signing later */
60 reference->add_child("DigestValue", "dsig");
62 signature->add_child("SignatureValue", "dsig");
63 signature->add_child("KeyInfo", "dsig");
64 add_signature_value (signature, "dsig");
70 * @param parent Node to sign.
71 * @param ns Namespace to use for the signature XML nodes.
74 Signer::add_signature_value (xmlpp::Node* parent, string ns) const
76 cxml::Node cp (parent);
77 xmlpp::Node* key_info = cp.node_child("KeyInfo")->node ();
79 /* Add the certificate chain to the KeyInfo child node of parent */
80 list<shared_ptr<Certificate> > c = _certificates.leaf_to_root ();
81 for (list<shared_ptr<Certificate> >::iterator i = c.begin(); i != c.end(); ++i) {
82 xmlpp::Element* data = key_info->add_child("X509Data", ns);
85 xmlpp::Element* serial = data->add_child("X509IssuerSerial", ns);
86 serial->add_child("X509IssuerName", ns)->add_child_text((*i)->issuer ());
87 serial->add_child("X509SerialNumber", ns)->add_child_text((*i)->serial ());
90 data->add_child("X509Certificate", ns)->add_child_text((*i)->certificate());
93 xmlSecDSigCtxPtr signature_context = xmlSecDSigCtxCreate (0);
94 if (signature_context == 0) {
95 throw MiscError ("could not create signature context");
98 signature_context->signKey = xmlSecCryptoAppKeyLoad (_key.c_str(), xmlSecKeyDataFormatPem, 0, 0, 0);
99 if (signature_context->signKey == 0) {
100 throw FileError ("could not load private key file", _key);
103 /* XXX: set key name to the file name: is this right? */
104 if (xmlSecKeySetName (signature_context->signKey, reinterpret_cast<const xmlChar *> (_key.c_str())) < 0) {
105 throw MiscError ("could not set key name");
108 if (xmlSecDSigCtxSign (signature_context, parent->cobj ()) < 0) {
109 throw MiscError ("could not sign");
112 xmlSecDSigCtxDestroy (signature_context);
116 Signer::add_signer (xmlpp::Element* parent, string ns) const
118 xmlpp::Element* signer = parent->add_child("Signer");
121 xmlpp::Element* data = signer->add_child("X509Data", ns);
124 xmlpp::Element* serial_element = data->add_child("X509IssuerSerial", ns);
125 serial_element->add_child("X509IssuerName", ns)->add_child_text (_certificates.leaf()->issuer());
126 serial_element->add_child("X509SerialNumber", ns)->add_child_text (_certificates.leaf()->serial());
129 data->add_child("X509SubjectName", ns)->add_child_text (_certificates.leaf()->subject());