2 Copyright (C) 2012 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.
22 #include <boost/algorithm/string.hpp>
23 #include <openssl/x509.h>
24 #include <openssl/ssl.h>
25 #include <openssl/asn1.h>
26 #include <libxml++/nodes/element.h>
28 #include "certificates.h"
29 #include "compose.hpp"
30 #include "exceptions.h"
34 using std::stringstream;
36 using boost::shared_ptr;
37 using namespace libdcp;
39 /** @param c X509 certificate, which this object will take ownership of */
40 Certificate::Certificate (X509* c)
46 Certificate::Certificate (boost::filesystem::path filename)
49 FILE* f = fopen (filename.c_str(), "r");
51 throw FileError ("could not open file", filename);
54 if (!PEM_read_X509 (f, &_certificate, 0, 0)) {
55 throw MiscError ("could not read X509 certificate");
59 Certificate::Certificate (string cert)
64 Certificate::Certificate (Certificate const & other)
66 read_string (other.certificate (true));
70 Certificate::read_string (string cert)
72 BIO* bio = BIO_new_mem_buf (const_cast<char *> (cert.c_str ()), -1);
74 throw MiscError ("could not create memory BIO");
77 _certificate = PEM_read_bio_X509 (bio, 0, 0, 0);
79 throw MiscError ("could not read X509 certificate from memory BIO");
85 Certificate::~Certificate ()
87 X509_free (_certificate);
91 Certificate::operator= (Certificate const & other)
97 X509_free (_certificate);
98 read_string (other.certificate ());
104 Certificate::certificate (bool with_begin_end) const
106 assert (_certificate);
108 BIO* bio = BIO_new (BIO_s_mem ());
110 throw MiscError ("could not create memory BIO");
113 PEM_write_bio_X509 (bio, _certificate);
117 long int const data_length = BIO_get_mem_data (bio, &data);
118 for (long int i = 0; i < data_length; ++i) {
124 if (!with_begin_end) {
125 boost::replace_all (s, "-----BEGIN CERTIFICATE-----\n", "");
126 boost::replace_all (s, "\n-----END CERTIFICATE-----\n", "");
133 Certificate::issuer () const
135 assert (_certificate);
136 return name_for_xml (X509_get_issuer_name (_certificate));
140 Certificate::asn_to_utf8 (ASN1_STRING* s)
142 unsigned char* buf = 0;
143 ASN1_STRING_to_UTF8 (&buf, s);
144 string const u (reinterpret_cast<char *> (buf));
150 Certificate::get_name_part (X509_NAME* n, int nid)
153 p = X509_NAME_get_index_by_NID (n, nid, p);
155 return asn_to_utf8 (X509_NAME_ENTRY_get_data (X509_NAME_get_entry (n, p)));
160 Certificate::name_for_xml (X509_NAME * n)
164 string s = String::compose (
165 "dnQualifier=%1,CN=%2,OU=%3,O=%4",
166 get_name_part (n, NID_dnQualifier),
167 get_name_part (n, NID_commonName),
168 get_name_part (n, NID_organizationalUnitName),
169 get_name_part (n, NID_organizationName)
172 boost::replace_all (s, "+", "\\+");
177 Certificate::subject () const
179 assert (_certificate);
181 return name_for_xml (X509_get_subject_name (_certificate));
185 Certificate::serial () const
187 assert (_certificate);
189 ASN1_INTEGER* s = X509_get_serialNumber (_certificate);
192 BIGNUM* b = ASN1_INTEGER_to_BN (s, 0);
193 char* c = BN_bn2dec (b);
203 Certificate::thumbprint () const
205 assert (_certificate);
207 uint8_t buffer[8192];
209 i2d_X509_CINF (_certificate->cert_info, &p);
210 int const length = p - buffer;
212 throw MiscError ("buffer too small to generate thumbprint");
217 SHA1_Update (&sha, buffer, length);
219 SHA1_Final (digest, &sha);
221 char digest_base64[64];
222 return Kumu::base64encode (digest, 20, digest_base64, 64);
225 shared_ptr<Certificate>
226 CertificateChain::root () const
228 assert (!_certificates.empty());
229 return _certificates.front ();
232 shared_ptr<Certificate>
233 CertificateChain::leaf () const
235 assert (_certificates.size() >= 2);
236 return _certificates.back ();
239 list<shared_ptr<Certificate> >
240 CertificateChain::leaf_to_root () const
242 list<shared_ptr<Certificate> > c = _certificates;
248 CertificateChain::add (shared_ptr<Certificate> c)
250 _certificates.push_back (c);