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.
21 #include <libxml++/libxml++.h>
22 #include <xmlsec/xmldsig.h>
23 #include <xmlsec/dl.h>
24 #include <xmlsec/app.h>
25 #include <xmlsec/crypto.h>
26 #include <libcxml/cxml.h>
28 #include "exceptions.h"
29 #include "compose.hpp"
34 using boost::shared_ptr;
35 using namespace libdcp;
37 /** @param signer_key Filename of private key to sign with */
39 Signer::sign (xmlpp::Element* parent, bool interop) const
41 add_signer (parent, "dsig");
43 xmlpp::Element* signature = parent->add_child("Signature", "dsig");
45 xmlpp::Element* signed_info = signature->add_child ("SignedInfo", "dsig");
46 signed_info->add_child("CanonicalizationMethod", "dsig")->set_attribute ("Algorithm", "http://www.w3.org/TR/2001/REC-xml-c14n-20010315");
49 signed_info->add_child("SignatureMethod", "dsig")->set_attribute("Algorithm", "http://www.w3.org/2000/09/xmldsig#rsa-sha1");
51 signed_info->add_child("SignatureMethod", "dsig")->set_attribute("Algorithm", "http://www.w3.org/2001/04/xmldsig-more#rsa-sha256");
54 xmlpp::Element* reference = signed_info->add_child("Reference", "dsig");
55 reference->set_attribute ("URI", "");
57 xmlpp::Element* transforms = reference->add_child("Transforms", "dsig");
58 transforms->add_child("Transform", "dsig")->set_attribute (
59 "Algorithm", "http://www.w3.org/2000/09/xmldsig#enveloped-signature"
62 reference->add_child("DigestMethod", "dsig")->set_attribute("Algorithm", "http://www.w3.org/2000/09/xmldsig#sha1");
63 /* This will be filled in by the signing later */
64 reference->add_child("DigestValue", "dsig");
66 signature->add_child("SignatureValue", "dsig");
67 signature->add_child("KeyInfo", "dsig");
68 add_signature_value (signature, "dsig");
74 * @param parent Node to sign.
75 * @param ns Namespace to use for the signature XML nodes.
78 Signer::add_signature_value (xmlpp::Node* parent, string ns) const
80 cxml::Node cp (parent);
81 xmlpp::Node* key_info = cp.node_child("KeyInfo")->node ();
83 /* Add the certificate chain to the KeyInfo child node of parent */
84 list<shared_ptr<Certificate> > c = _certificates.leaf_to_root ();
85 for (list<shared_ptr<Certificate> >::iterator i = c.begin(); i != c.end(); ++i) {
86 xmlpp::Element* data = key_info->add_child("X509Data", ns);
89 xmlpp::Element* serial = data->add_child("X509IssuerSerial", ns);
90 serial->add_child("X509IssuerName", ns)->add_child_text((*i)->issuer ());
91 serial->add_child("X509SerialNumber", ns)->add_child_text((*i)->serial ());
94 data->add_child("X509Certificate", ns)->add_child_text((*i)->certificate());
97 xmlSecDSigCtxPtr signature_context = xmlSecDSigCtxCreate (0);
98 if (signature_context == 0) {
99 throw MiscError ("could not create signature context");
102 signature_context->signKey = xmlSecCryptoAppKeyLoad (_key.string().c_str(), xmlSecKeyDataFormatPem, 0, 0, 0);
103 if (signature_context->signKey == 0) {
104 throw FileError ("could not load private key file", _key, 0);
107 /* XXX: set key name to the file name: is this right? */
108 if (xmlSecKeySetName (signature_context->signKey, reinterpret_cast<const xmlChar *> (_key.c_str())) < 0) {
109 throw MiscError ("could not set key name");
112 int const r = xmlSecDSigCtxSign (signature_context, parent->cobj ());
114 throw MiscError (String::compose ("could not sign (%1)", r));
117 xmlSecDSigCtxDestroy (signature_context);
121 Signer::add_signer (xmlpp::Element* parent, string ns) const
123 xmlpp::Element* signer = parent->add_child("Signer");
126 xmlpp::Element* data = signer->add_child("X509Data", ns);
129 xmlpp::Element* serial_element = data->add_child("X509IssuerSerial", ns);
130 serial_element->add_child("X509IssuerName", ns)->add_child_text (_certificates.leaf()->issuer());
131 serial_element->add_child("X509SerialNumber", ns)->add_child_text (_certificates.leaf()->serial());
134 data->add_child("X509SubjectName", ns)->add_child_text (_certificates.leaf()->subject());