/*
- Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2012-2014 Carl Hetherington <cth@carlh.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
*/
-#include <sstream>
-#include <vector>
-#include <boost/algorithm/string.hpp>
-#include <openssl/x509.h>
-#include <openssl/ssl.h>
-#include <openssl/asn1.h>
-#include <libxml++/nodes/element.h>
+/** @file src/certificates.cc
+ * @brief Certificate and CertificateChain classes.
+ */
+
#include "KM_util.h"
#include "certificates.h"
+#include "compose.hpp"
#include "exceptions.h"
+#include "util.h"
+#include <libxml++/nodes/element.h>
+#include <openssl/x509.h>
+#include <openssl/ssl.h>
+#include <openssl/asn1.h>
+#include <openssl/err.h>
+#include <boost/algorithm/string.hpp>
+#include <cerrno>
using std::list;
using std::string;
-using std::stringstream;
-using std::vector;
using boost::shared_ptr;
-using namespace libdcp;
+using namespace dcp;
/** @param c X509 certificate, which this object will take ownership of */
Certificate::Certificate (X509* c)
: _certificate (c)
+ , _public_key (0)
{
}
+/** Load an X509 certificate from a file.
+ * @param filename File to load.
+ */
+Certificate::Certificate (boost::filesystem::path filename)
+ : _certificate (0)
+ , _public_key (0)
+{
+ FILE* f = fopen_boost (filename, "r");
+ if (!f) {
+ throw FileError ("could not open file", filename, errno);
+ }
+
+ if (!PEM_read_X509 (f, &_certificate, 0, 0)) {
+ throw MiscError ("could not read X509 certificate");
+ }
+}
+
+/** Load an X509 certificate from a string.
+ * @param cert String to read from.
+ */
+Certificate::Certificate (string cert)
+ : _certificate (0)
+ , _public_key (0)
+{
+ read_string (cert);
+}
+
+/** Copy constructor.
+ * @param other Certificate to copy.
+ */
+Certificate::Certificate (Certificate const & other)
+ : _certificate (0)
+ , _public_key (0)
+{
+ read_string (other.certificate (true));
+}
+
+/** Read a certificate from a string.
+ * @param cert String to read.
+ */
+void
+Certificate::read_string (string cert)
+{
+ BIO* bio = BIO_new_mem_buf (const_cast<char *> (cert.c_str ()), -1);
+ if (!bio) {
+ throw MiscError ("could not create memory BIO");
+ }
+
+ _certificate = PEM_read_bio_X509 (bio, 0, 0, 0);
+ if (!_certificate) {
+ throw MiscError ("could not read X509 certificate from memory BIO");
+ }
+
+ BIO_free (bio);
+}
+
+/** Destructor */
Certificate::~Certificate ()
{
X509_free (_certificate);
+ RSA_free (_public_key);
}
+/** operator= for Certificate.
+ * @param other Certificate to read from.
+ */
+Certificate &
+Certificate::operator= (Certificate const & other)
+{
+ if (this == &other) {
+ return *this;
+ }
+
+ X509_free (_certificate);
+ _certificate = 0;
+ RSA_free (_public_key);
+ _public_key = 0;
+
+ read_string (other.certificate ());
+
+ return *this;
+}
+
+/** Return the certificate as a string.
+ * @param with_begin_end true to include the -----BEGIN CERTIFICATE--- / -----END CERTIFICATE----- markers.
+ * @return Certificate string.
+ */
string
-Certificate::certificate () const
+Certificate::certificate (bool with_begin_end) const
{
+ assert (_certificate);
+
BIO* bio = BIO_new (BIO_s_mem ());
if (!bio) {
throw MiscError ("could not create memory BIO");
BIO_free (bio);
- boost::replace_all (s, "-----BEGIN CERTIFICATE-----\n", "");
- boost::replace_all (s, "\n-----END CERTIFICATE-----\n", "");
+ if (!with_begin_end) {
+ boost::replace_all (s, "-----BEGIN CERTIFICATE-----\n", "");
+ boost::replace_all (s, "\n-----END CERTIFICATE-----\n", "");
+ }
+
return s;
}
+/** @return Certificate's issuer, in the form
+ * dnqualifier=<dnQualififer>,CN=<commonName>,OU=<organizationalUnitName>,O=<organizationName>
+ * and with + signs escaped to \+
+ */
string
Certificate::issuer () const
{
- X509_NAME* n = X509_get_issuer_name (_certificate);
- assert (n);
+ assert (_certificate);
+ return name_for_xml (X509_get_issuer_name (_certificate));
+}
- char b[256];
- X509_NAME_oneline (n, b, 256);
- return b;
+string
+Certificate::asn_to_utf8 (ASN1_STRING* s)
+{
+ unsigned char* buf = 0;
+ ASN1_STRING_to_UTF8 (&buf, s);
+ string const u (reinterpret_cast<char *> (buf));
+ OPENSSL_free (buf);
+ return u;
}
string
-Certificate::name_for_xml (string const & n)
+Certificate::get_name_part (X509_NAME* n, int nid)
{
- stringstream x;
+ int p = -1;
+ p = X509_NAME_get_index_by_NID (n, nid, p);
+ assert (p != -1);
+ return asn_to_utf8 (X509_NAME_ENTRY_get_data (X509_NAME_get_entry (n, p)));
+}
- vector<string> p;
- boost::split (p, n, boost::is_any_of ("/"));
- for (vector<string>::const_reverse_iterator i = p.rbegin(); i != p.rend(); ++i) {
- x << *i << ",";
- }
- string s = x.str();
- boost::replace_all (s, "+", "\\+");
+string
+Certificate::name_for_xml (X509_NAME * n)
+{
+ assert (n);
- return s.substr(0, s.length() - 2);
+ string s = String::compose (
+ "dnQualifier=%1,CN=%2,OU=%3,O=%4",
+ get_name_part (n, NID_dnQualifier),
+ get_name_part (n, NID_commonName),
+ get_name_part (n, NID_organizationalUnitName),
+ get_name_part (n, NID_organizationName)
+ );
+
+ boost::replace_all (s, "+", "\\+");
+ return s;
}
string
Certificate::subject () const
{
- X509_NAME* n = X509_get_subject_name (_certificate);
- assert (n);
+ assert (_certificate);
- char b[256];
- X509_NAME_oneline (n, b, 256);
- return b;
+ return name_for_xml (X509_get_subject_name (_certificate));
+}
+
+string
+Certificate::common_name () const
+{
+ assert (_certificate);
+
+ return get_name_part (X509_get_subject_name (_certificate), NID_commonName);
}
string
Certificate::serial () const
{
+ assert (_certificate);
+
ASN1_INTEGER* s = X509_get_serialNumber (_certificate);
assert (s);
string
Certificate::thumbprint () const
{
+ assert (_certificate);
+
uint8_t buffer[8192];
uint8_t* p = buffer;
i2d_X509_CINF (_certificate->cert_info, &p);
return Kumu::base64encode (digest, 20, digest_base64, 64);
}
-/** @param filename Text file of PEM-format certificates,
- * in the order:
- *
- * 1. self-signed root certificate
- * 2. intermediate certificate signed by root certificate
- * ...
- * n. leaf certificate signed by previous intermediate.
- */
-
-CertificateChain::CertificateChain (string const & filename)
+/** @return RSA public key from this Certificate. Caller must not free the returned value. */
+RSA *
+Certificate::public_key () const
{
- FILE* f = fopen (filename.c_str(), "r");
- if (!f) {
- throw FileError ("could not open file", filename);
+ assert (_certificate);
+
+ if (_public_key) {
+ return _public_key;
+ }
+
+ EVP_PKEY* key = X509_get_pubkey (_certificate);
+ if (!key) {
+ throw MiscError ("could not get public key from certificate");
}
-
- while (1) {
- X509* c = 0;
- if (!PEM_read_X509 (f, &c, 0, 0)) {
- break;
- }
- _certificates.push_back (shared_ptr<Certificate> (new Certificate (c)));
+ _public_key = EVP_PKEY_get1_RSA (key);
+ if (!_public_key) {
+ throw MiscError (String::compose ("could not get RSA public key (%1)", ERR_error_string (ERR_get_error(), 0)));
}
+
+ return _public_key;
}
+/** @return Root certificate */
shared_ptr<Certificate>
CertificateChain::root () const
{
return _certificates.front ();
}
+/** @return Leaf certificate */
shared_ptr<Certificate>
CertificateChain::leaf () const
{
return _certificates.back ();
}
+/** @return Certificates in order from leaf to root */
list<shared_ptr<Certificate> >
CertificateChain::leaf_to_root () const
{
return c;
}
+/** Add a certificate to the end of the chain.
+ * @param c Certificate to add.
+ */
+void
+CertificateChain::add (shared_ptr<Certificate> c)
+{
+ _certificates.push_back (c);
+}
projects / libdcp.git / blobdiff