blob: 88e67824ed9dbc7cfeb3b39113b0cea923d4d216 [file] [log] [blame]
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
/**
* Copyright (C) 2013 Regents of the University of California.
* @author: Yingdi Yu <yingdi@cs.ucla.edu>
* @author: Jeff Thompson <jefft0@remap.ucla.edu>
* See COPYING for copyright and distribution information.
*/
#include <ndn-cpp/ndn-cpp-config.h>
#if NDN_CPP_HAVE_TIME_H
#include <time.h>
#endif
#if NDN_CPP_HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#include <ctime>
#include <fstream>
#include <math.h>
#include <ndn-cpp/key-locator.hpp>
#include <ndn-cpp/sha256-with-rsa-signature.hpp>
#include <ndn-cpp/security/security-exception.hpp>
#include "../../util/logging.hpp"
#include "../../c/util/time.h"
#include <ndn-cpp/security/identity/identity-manager.hpp>
INIT_LOGGER("ndn.security.IdentityManager")
using namespace std;
namespace ndn {
Name
IdentityManager::createIdentity(const Name& identityName)
{
if (!identityStorage_->doesIdentityExist(identityName)) {
_LOG_DEBUG("Create Identity");
identityStorage_->addIdentity(identityName);
_LOG_DEBUG("Create Default RSA key pair");
Name keyName = generateRSAKeyPairAsDefault(identityName, true);
_LOG_DEBUG("Create self-signed certificate");
ptr_lib::shared_ptr<IdentityCertificate> selfCert = selfSign(keyName);
_LOG_DEBUG("Add self-signed certificate as default");
addCertificateAsDefault(*selfCert);
return keyName;
}
else
throw SecurityException("Identity has already been created!");
}
Name
IdentityManager::generateKeyPair(const Name& identityName, bool isKsk, KeyType keyType, int keySize)
{
_LOG_DEBUG("Get new key ID");
Name keyName = identityStorage_->getNewKeyName(identityName, isKsk);
_LOG_DEBUG("Generate key pair in private storage");
privateKeyStorage_->generateKeyPair(keyName.toUri(), keyType, keySize);
_LOG_DEBUG("Create a key record in public storage");
ptr_lib::shared_ptr<PublicKey> pubKey = privateKeyStorage_->getPublicKey(keyName.toUri());
identityStorage_->addKey(keyName, keyType, pubKey->getKeyDer());
return keyName;
}
Name
IdentityManager::generateRSAKeyPair(const Name& identityName, bool isKsk, int keySize)
{
Name keyName = generateKeyPair(identityName, isKsk, KEY_TYPE_RSA, keySize);
return keyName;
}
Name
IdentityManager::generateRSAKeyPairAsDefault(const Name& identityName, bool isKsk, int keySize)
{
Name keyName = generateKeyPair(identityName, isKsk, KEY_TYPE_RSA, keySize);
identityStorage_->setDefaultKeyNameForIdentity(keyName, identityName);
return keyName;
}
Name
IdentityManager::createIdentityCertificate(const Name& certificatePrefix,
const Name& signerCertificateName,
const MillisecondsSince1970& notBefore,
const MillisecondsSince1970& notAfter)
{
Name keyName = getKeyNameFromCertificatePrefix(certificatePrefix);
Blob keyBlob = identityStorage_->getKey(keyName);
ptr_lib::shared_ptr<PublicKey> publicKey = PublicKey::fromDer(keyBlob);
ptr_lib::shared_ptr<IdentityCertificate> certificate = createIdentityCertificate
(certificatePrefix, *publicKey, signerCertificateName, notBefore, notAfter);
identityStorage_->addCertificate(*certificate);
return certificate->getName();
}
ptr_lib::shared_ptr<IdentityCertificate>
IdentityManager::createIdentityCertificate(const Name& certificatePrefix,
const PublicKey& publicKey,
const Name& signerCertificateName,
const MillisecondsSince1970& notBefore,
const MillisecondsSince1970& notAfter)
{
ptr_lib::shared_ptr<IdentityCertificate> certificate(new IdentityCertificate());
Name keyName = getKeyNameFromCertificatePrefix(certificatePrefix);
Name certificateName = certificatePrefix;
MillisecondsSince1970 ti = ::ndn_getNowMilliseconds();
// Get the number of seconds.
ostringstream oss;
oss << floor(ti / 1000.0);
certificateName.append("ID-CERT").append(oss.str());
certificate->setName(certificateName);
certificate->setNotBefore(notBefore);
certificate->setNotAfter(notAfter);
certificate->setPublicKeyInfo(publicKey);
certificate->addSubjectDescription(CertificateSubjectDescription("2.5.4.41", keyName.toUri()));
certificate->encode();
ptr_lib::shared_ptr<Sha256WithRsaSignature> sha256Sig(new Sha256WithRsaSignature());
KeyLocator keyLocator;
keyLocator.setType(ndn_KeyLocatorType_KEYNAME);
keyLocator.setKeyName(signerCertificateName);
sha256Sig->setKeyLocator(keyLocator);
sha256Sig->getPublisherPublicKeyDigest().setPublisherPublicKeyDigest(publicKey.getDigest());
certificate->setSignature(*sha256Sig);
SignedBlob unsignedData = certificate->wireEncode();
ptr_lib::shared_ptr<IdentityCertificate> signerCertificate = getCertificate(signerCertificateName);
Name signerkeyName = signerCertificate->getPublicKeyName();
Blob sigBits = privateKeyStorage_->sign(unsignedData, signerkeyName);
sha256Sig->setSignature(sigBits);
return certificate;
}
void
IdentityManager::addCertificateAsDefault(const IdentityCertificate& certificate)
{
identityStorage_->addCertificate(certificate);
setDefaultCertificateForKey(certificate);
}
void
IdentityManager::addCertificateAsIdentityDefault(const IdentityCertificate& certificate)
{
identityStorage_->addCertificate(certificate);
Name keyName = certificate.getPublicKeyName();
setDefaultKeyForIdentity(keyName);
setDefaultCertificateForKey(certificate);
}
void
IdentityManager::setDefaultCertificateForKey(const IdentityCertificate& certificate)
{
Name keyName = certificate.getPublicKeyName();
if(!identityStorage_->doesKeyExist(keyName))
throw SecurityException("No corresponding Key record for certificate!");
identityStorage_->setDefaultCertificateNameForKey(keyName, certificate.getName());
}
ptr_lib::shared_ptr<Signature>
IdentityManager::signByCertificate(const uint8_t* buffer, size_t bufferLength, const Name& certificateName)
{
Name keyName = IdentityCertificate::certificateNameToPublicKeyName(certificateName);
ptr_lib::shared_ptr<PublicKey> publicKey = privateKeyStorage_->getPublicKey(keyName.toUri());
Blob sigBits = privateKeyStorage_->sign(buffer, bufferLength, keyName.toUri());
//For temporary usage, we support RSA + SHA256 only, but will support more.
ptr_lib::shared_ptr<Sha256WithRsaSignature> sha256Sig(new Sha256WithRsaSignature());
KeyLocator keyLocator;
keyLocator.setType(ndn_KeyLocatorType_KEYNAME);
keyLocator.setKeyName(certificateName);
sha256Sig->setKeyLocator(keyLocator);
sha256Sig->getPublisherPublicKeyDigest().setPublisherPublicKeyDigest(publicKey->getDigest());
sha256Sig->setSignature(sigBits);
return sha256Sig;
}
void
IdentityManager::signByCertificate(Data &data, const Name &certificateName, WireFormat& wireFormat)
{
Name keyName = IdentityCertificate::certificateNameToPublicKeyName(certificateName);
ptr_lib::shared_ptr<PublicKey> publicKey = privateKeyStorage_->getPublicKey(keyName);
// For temporary usage, we support RSA + SHA256 only, but will support more.
data.setSignature(Sha256WithRsaSignature());
// Get a pointer to the clone which Data made.
Sha256WithRsaSignature *signature = dynamic_cast<Sha256WithRsaSignature*>(data.getSignature());
DigestAlgorithm digestAlgorithm = DIGEST_ALGORITHM_SHA256;
signature->getKeyLocator().setType(ndn_KeyLocatorType_KEYNAME);
signature->getKeyLocator().setKeyName(certificateName.getPrefix(-1));
// Omit the certificate digest.
signature->getKeyLocator().setKeyNameType((ndn_KeyNameType)-1);
// Ignore witness and leave the digestAlgorithm as the default.
signature->getPublisherPublicKeyDigest().setPublisherPublicKeyDigest(publicKey->getDigest());
// Encode once to get the signed portion.
SignedBlob encoding = data.wireEncode(wireFormat);
signature->setSignature
(privateKeyStorage_->sign(encoding.signedBuf(), encoding.signedSize(), keyName, digestAlgorithm));
// Encode again to include the signature.
data.wireEncode(wireFormat);
}
ptr_lib::shared_ptr<IdentityCertificate>
IdentityManager::selfSign(const Name& keyName)
{
ptr_lib::shared_ptr<IdentityCertificate> certificate(new IdentityCertificate());
Name certificateName = keyName.getSubName(0, keyName.size() - 1);
certificateName.append("KEY").append(keyName.get(keyName.size() - 1)).append("ID-CERT").append("0");
certificate->setName(certificateName);
Blob keyBlob = identityStorage_->getKey(keyName);
ptr_lib::shared_ptr<PublicKey> publicKey = PublicKey::fromDer(keyBlob);
#if NDN_CPP_HAVE_GMTIME_SUPPORT
time_t nowSeconds = time(NULL);
struct tm current = *gmtime(&nowSeconds);
current.tm_hour = 0;
current.tm_min = 0;
current.tm_sec = 0;
MillisecondsSince1970 notBefore = timegm(&current) * 1000.0;
current.tm_year = current.tm_year + 20;
MillisecondsSince1970 notAfter = timegm(&current) * 1000.0;
certificate->setNotBefore(notBefore);
certificate->setNotAfter(notAfter);
#else
// Don't really expect this to happen.
throw SecurityException("selfSign: Can't set certificate validity because time functions are not supported by the standard library.");
#endif
certificate->setPublicKeyInfo(*publicKey);
certificate->addSubjectDescription(CertificateSubjectDescription("2.5.4.41", keyName.toUri()));
certificate->encode();
ptr_lib::shared_ptr<Sha256WithRsaSignature> sha256Sig(new Sha256WithRsaSignature());
KeyLocator keyLocator;
keyLocator.setType(ndn_KeyLocatorType_KEYNAME);
keyLocator.setKeyName(certificateName);
sha256Sig->setKeyLocator(keyLocator);
sha256Sig->getPublisherPublicKeyDigest().setPublisherPublicKeyDigest(publicKey->getDigest());
certificate->setSignature(*sha256Sig);
Blob unsignedData = certificate->wireEncode();
Blob sigBits = privateKeyStorage_->sign(unsignedData, keyName.toUri());
sha256Sig->setSignature(sigBits);
return certificate;
}
Name
IdentityManager::getKeyNameFromCertificatePrefix(const Name & certificatePrefix)
{
Name result;
string keyString("KEY");
int i = 0;
for(; i < certificatePrefix.size(); i++) {
if (certificatePrefix.get(i).toEscapedString() == keyString)
break;
}
if (i >= certificatePrefix.size())
throw SecurityException("Identity Certificate Prefix does not have a KEY component");
result.append(certificatePrefix.getSubName(0, i));
result.append(certificatePrefix.getSubName(i + 1, certificatePrefix.size()-i-1));
return result;
}
}