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 <openssl/err.h>
27 #include <libxml++/nodes/element.h>
29 #include "certificates.h"
30 #include "compose.hpp"
31 #include "exceptions.h"
35 using std::stringstream;
37 using boost::shared_ptr;
38 using namespace libdcp;
40 /** @param c X509 certificate, which this object will take ownership of */
41 Certificate::Certificate (X509* c)
48 Certificate::Certificate (boost::filesystem::path filename)
52 FILE* f = fopen (filename.string().c_str(), "r");
54 throw FileError ("could not open file", filename);
57 if (!PEM_read_X509 (f, &_certificate, 0, 0)) {
58 throw MiscError ("could not read X509 certificate");
62 Certificate::Certificate (string cert)
69 Certificate::Certificate (Certificate const & other)
73 read_string (other.certificate (true));
77 Certificate::read_string (string cert)
79 BIO* bio = BIO_new_mem_buf (const_cast<char *> (cert.c_str ()), -1);
81 throw MiscError ("could not create memory BIO");
84 _certificate = PEM_read_bio_X509 (bio, 0, 0, 0);
86 throw MiscError ("could not read X509 certificate from memory BIO");
92 Certificate::~Certificate ()
94 X509_free (_certificate);
95 RSA_free (_public_key);
99 Certificate::operator= (Certificate const & other)
101 if (this == &other) {
105 X509_free (_certificate);
107 RSA_free (_public_key);
110 read_string (other.certificate ());
116 Certificate::certificate (bool with_begin_end) const
118 assert (_certificate);
120 BIO* bio = BIO_new (BIO_s_mem ());
122 throw MiscError ("could not create memory BIO");
125 PEM_write_bio_X509 (bio, _certificate);
129 long int const data_length = BIO_get_mem_data (bio, &data);
130 for (long int i = 0; i < data_length; ++i) {
136 if (!with_begin_end) {
137 boost::replace_all (s, "-----BEGIN CERTIFICATE-----\n", "");
138 boost::replace_all (s, "\n-----END CERTIFICATE-----\n", "");
145 Certificate::issuer () const
147 assert (_certificate);
148 return name_for_xml (X509_get_issuer_name (_certificate));
152 Certificate::asn_to_utf8 (ASN1_STRING* s)
154 unsigned char* buf = 0;
155 ASN1_STRING_to_UTF8 (&buf, s);
156 string const u (reinterpret_cast<char *> (buf));
162 Certificate::get_name_part (X509_NAME* n, int nid)
165 p = X509_NAME_get_index_by_NID (n, nid, p);
167 return asn_to_utf8 (X509_NAME_ENTRY_get_data (X509_NAME_get_entry (n, p)));
172 Certificate::name_for_xml (X509_NAME * n)
176 string s = String::compose (
177 "dnQualifier=%1,CN=%2,OU=%3,O=%4",
178 get_name_part (n, NID_dnQualifier),
179 get_name_part (n, NID_commonName),
180 get_name_part (n, NID_organizationalUnitName),
181 get_name_part (n, NID_organizationName)
184 boost::replace_all (s, "+", "\\+");
189 Certificate::subject () const
191 assert (_certificate);
193 return name_for_xml (X509_get_subject_name (_certificate));
197 Certificate::common_name () const
199 assert (_certificate);
201 return get_name_part (X509_get_subject_name (_certificate), NID_commonName);
205 Certificate::serial () const
207 assert (_certificate);
209 ASN1_INTEGER* s = X509_get_serialNumber (_certificate);
212 BIGNUM* b = ASN1_INTEGER_to_BN (s, 0);
213 char* c = BN_bn2dec (b);
223 Certificate::thumbprint () const
225 assert (_certificate);
227 uint8_t buffer[8192];
229 i2d_X509_CINF (_certificate->cert_info, &p);
230 int const length = p - buffer;
232 throw MiscError ("buffer too small to generate thumbprint");
237 SHA1_Update (&sha, buffer, length);
239 SHA1_Final (digest, &sha);
241 char digest_base64[64];
242 return Kumu::base64encode (digest, 20, digest_base64, 64);
246 Certificate::public_key () const
248 assert (_certificate);
254 EVP_PKEY* key = X509_get_pubkey (_certificate);
256 throw MiscError ("could not get public key from certificate");
259 _public_key = EVP_PKEY_get1_RSA (key);
261 throw MiscError (String::compose ("could not get RSA public key (%1)", ERR_error_string (ERR_get_error(), 0)));
267 shared_ptr<Certificate>
268 CertificateChain::root () const
270 assert (!_certificates.empty());
271 return _certificates.front ();
274 shared_ptr<Certificate>
275 CertificateChain::leaf () const
277 assert (_certificates.size() >= 2);
278 return _certificates.back ();
281 list<shared_ptr<Certificate> >
282 CertificateChain::leaf_to_root () const
284 list<shared_ptr<Certificate> > c = _certificates;
290 CertificateChain::add (shared_ptr<Certificate> c)
292 _certificates.push_back (c);