NS-3 based Named Data Networking (NDN) simulator
ndnSIM 2.3: NDN, CCN, CCNx, content centric networks
API Documentation
trust-anchor-group.cpp
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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3  * Copyright (c) 2013-2017 Regents of the University of California.
4  *
5  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
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7  * ndn-cxx library is free software: you can redistribute it and/or modify it under the
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17  * <http://www.gnu.org/licenses/>.
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19  * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
20  */
21 
22 #include "trust-anchor-group.hpp"
23 
24 #include "util/io.hpp"
25 #include "util/logger.hpp"
26 
27 #include <boost/filesystem.hpp>
28 #include <boost/range/adaptor/map.hpp>
29 #include <boost/range/algorithm/copy.hpp>
30 #include <boost/range/iterator_range.hpp>
31 
32 namespace ndn {
33 namespace security {
34 namespace v2 {
35 
37 
38 namespace fs = boost::filesystem;
39 
40 TrustAnchorGroup::TrustAnchorGroup(CertContainerInterface& certContainer, const std::string& id)
41  : m_certs(certContainer)
42  , m_id(id)
43 {
44 }
45 
47 
48 size_t
50 {
51  return m_anchorNames.size();
52 }
53 
54 void
56 {
57  // base method does nothing
58 }
59 
61 
63  : TrustAnchorGroup(certContainer, id)
64 {
65 }
66 
67 void
69 {
70  if (m_anchorNames.count(cert.getName()) != 0) {
71  return;
72  }
73 
74  m_anchorNames.insert(cert.getName());
75  m_certs.add(std::move(cert));
76 }
77 
78 void
80 {
81  m_anchorNames.erase(certName);
82  m_certs.remove(certName);
83 }
84 
86 
88  const boost::filesystem::path& path,
89  time::nanoseconds refreshPeriod, bool isDir)
90  : TrustAnchorGroup(certContainer, id)
91  , m_isDir(isDir)
92  , m_path(path)
93  , m_refreshPeriod(refreshPeriod)
94 {
95  if (refreshPeriod <= time::nanoseconds::zero()) {
96  BOOST_THROW_EXCEPTION(std::runtime_error("Refresh period for the dynamic group must be positive"));
97  }
98 
99  NDN_LOG_TRACE("Create dynamic trust anchor group " << id << " for file/dir " << path
100  << " with refresh time " << refreshPeriod);
101  refresh();
102 }
103 
104 void
106 {
107  if (m_expireTime > time::steady_clock::now()) {
108  return;
109  }
110  m_expireTime = time::steady_clock::now() + m_refreshPeriod;
111  NDN_LOG_TRACE("Reloading dynamic trust anchor group");
112 
113  std::set<Name> oldAnchorNames = m_anchorNames;
114 
115  auto loadCert = [this, &oldAnchorNames] (const fs::path& file) {
116  auto cert = io::load<Certificate>(file.string());
117  if (cert != nullptr) {
118  if (m_anchorNames.count(cert->getName()) == 0) {
119  m_anchorNames.insert(cert->getName());
120  m_certs.add(std::move(*cert));
121  }
122  else {
123  oldAnchorNames.erase(cert->getName());
124  }
125  }
126  };
127 
128  if (!m_isDir) {
129  loadCert(m_path);
130  }
131  else {
132  if (fs::exists(m_path)) {
133  std::for_each(fs::directory_iterator(m_path), fs::directory_iterator(), loadCert);
134  }
135  }
136 
137  // remove old certs
138  for (const auto& oldAnchorName : oldAnchorNames) {
139  m_anchorNames.erase(oldAnchorName);
140  m_certs.remove(oldAnchorName);
141  }
142 }
143 
144 } // namespace v2
145 } // namespace security
146 } // namespace ndn
TrustAnchorGroup(CertContainerInterface &certContainer, const std::string &id)
Create an anchor group.
Copyright (c) 2011-2015 Regents of the University of California.
The certificate following the certificate format naming convention.
Definition: certificate.hpp:81
virtual void refresh()
Request certificate refresh.
static time_point now() noexcept
Definition: time.cpp:80
Catch-all error for security policy errors that don&#39;t fit in other categories.
Definition: base.hpp:79
#define NDN_LOG_INIT(name)
declare a log module
Definition: logger.hpp:32
void refresh() override
Request certificate refresh.
virtual void add(Certificate &&cert)=0
Represents an absolute name.
Definition: name.hpp:42
void add(Certificate &&cert)
Load static anchor cert.
#define NDN_LOG_TRACE(expression)
Definition: logger.hpp:34
void remove(const Name &certName)
Remove static anchor certName.
virtual void remove(const Name &certName)=0
DynamicTrustAnchorGroup(CertContainerInterface &certContainer, const std::string &id, const boost::filesystem::path &path, time::nanoseconds refreshPeriod, bool isDir=false)
Create a dynamic trust anchor group.
StaticTrustAnchorGroup(CertContainerInterface &certContainer, const std::string &id)
Create a static trust anchor group.