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// Copyright (C) 2010 Internet Systems Consortium, Inc. ("ISC")
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
// PERFORMANCE OF THIS SOFTWARE.
// $Id$
#include <iostream>
#include <string>
#include <sstream>
#include <vector>
#include <boost/lexical_cast.hpp>
#include <dns/buffer.h>
#include <dns/hex.h>
#include <dns/messagerenderer.h>
#include <dns/name.h>
#include <dns/rdata.h>
#include <dns/rdataclass.h>
#include <stdio.h>
#include <time.h>
using namespace std;
// BEGIN_ISC_NAMESPACE
// BEGIN_RDATA_NAMESPACE
struct NSEC3PARAMImpl {
// straightforward representation of NSEC3PARAM RDATA fields
NSEC3PARAMImpl(uint8_t hashalg, uint8_t flags, uint16_t iterations,
const vector<uint8_t>& salt) :
hashalg_(hashalg), flags_(flags), iterations_(iterations), salt_(salt)
{}
uint8_t hashalg_;
uint8_t flags_;
uint16_t iterations_;
const vector<uint8_t> salt_;
};
NSEC3PARAM::NSEC3PARAM(const string& nsec3param_str) :
impl_(NULL)
{
istringstream iss(nsec3param_str);
uint16_t hashalg, flags, iterations;
stringbuf saltbuf;
iss >> hashalg >> flags >> iterations >> &saltbuf;
if (iss.bad() || iss.fail()) {
isc_throw(InvalidRdataText, "Invalid NSEC3PARAM text");
}
if (hashalg > 0xf) {
isc_throw(InvalidRdataText, "NSEC3PARAM hash algorithm out of range");
}
if (flags > 0xff) {
isc_throw(InvalidRdataText, "NSEC3PARAM flags out of range");
}
vector<uint8_t> salt;
decodeHex(saltbuf.str(), salt);
impl_ = new NSEC3PARAMImpl(hashalg, flags, iterations, salt);
}
NSEC3PARAM::NSEC3PARAM(InputBuffer& buffer, size_t rdata_len)
{
if (rdata_len < 4) {
isc_throw(InvalidRdataLength, "NSEC3PARAM too short");
}
uint8_t hashalg = buffer.readUint8();
uint8_t flags = buffer.readUint8();
uint16_t iterations = buffer.readUint16();
rdata_len -= 4;
uint8_t saltlen = buffer.readUint8();
--rdata_len;
if (rdata_len < saltlen) {
isc_throw(InvalidRdataLength, "NSEC3PARAM salt too short");
}
vector<uint8_t> salt(saltlen);
buffer.readData(&salt[0], saltlen);
impl_ = new NSEC3PARAMImpl(hashalg, flags, iterations, salt);
}
NSEC3PARAM::NSEC3PARAM(const NSEC3PARAM& source) :
Rdata(), impl_(new NSEC3PARAMImpl(*source.impl_))
{}
NSEC3PARAM&
NSEC3PARAM::operator=(const NSEC3PARAM& source)
{
if (impl_ == source.impl_) {
return (*this);
}
NSEC3PARAMImpl* newimpl = new NSEC3PARAMImpl(*source.impl_);
delete impl_;
impl_ = newimpl;
return (*this);
}
NSEC3PARAM::~NSEC3PARAM()
{
delete impl_;
}
string
NSEC3PARAM::toText() const
{
using namespace boost;
return (lexical_cast<string>(static_cast<int>(impl_->hashalg_)) +
" " + lexical_cast<string>(static_cast<int>(impl_->flags_)) +
" " + lexical_cast<string>(static_cast<int>(impl_->iterations_)) +
" " + encodeHex(impl_->salt_));
}
void
NSEC3PARAM::toWire(OutputBuffer& buffer) const
{
buffer.writeUint8(impl_->hashalg_);
buffer.writeUint8(impl_->flags_);
buffer.writeUint16(impl_->iterations_);
buffer.writeUint8(impl_->salt_.size());
buffer.writeData(&impl_->salt_[0], impl_->salt_.size());
}
void
NSEC3PARAM::toWire(MessageRenderer& renderer) const
{
renderer.writeUint8(impl_->hashalg_);
renderer.writeUint8(impl_->flags_);
renderer.writeUint16(impl_->iterations_);
renderer.writeUint8(impl_->salt_.size());
renderer.writeData(&impl_->salt_[0], impl_->salt_.size());
}
int
NSEC3PARAM::compare(const Rdata& other) const
{
const NSEC3PARAM& other_param = dynamic_cast<const NSEC3PARAM&>(other);
if (impl_->hashalg_ != other_param.impl_->hashalg_) {
return (impl_->hashalg_ < other_param.impl_->hashalg_ ? -1 : 1);
}
if (impl_->flags_ != other_param.impl_->flags_) {
return (impl_->flags_ < other_param.impl_->flags_ ? -1 : 1);
}
if (impl_->iterations_ != other_param.impl_->iterations_) {
return (impl_->iterations_ < other_param.impl_->iterations_ ? -1 : 1);
}
size_t this_len = impl_->salt_.size();
size_t other_len = other_param.impl_->salt_.size();
size_t cmplen = min(this_len, other_len);
int cmp = memcmp(&impl_->salt_[0], &other_param.impl_->salt_[0],
cmplen);
if (cmp != 0) {
return (cmp);
} else {
return ((this_len == other_len) ? 0 : (this_len < other_len) ? -1 : 1);
}
}
uint8_t
NSEC3PARAM::getHashalg() const {
return (impl_->hashalg_);
}
uint8_t
NSEC3PARAM::getFlags() const {
return (impl_->flags_);
}
uint16_t
NSEC3PARAM::getIterations() const {
return (impl_->iterations_);
}
const vector<uint8_t>&
NSEC3PARAM::getSalt() const {
return (impl_->salt_);
}
// END_RDATA_NAMESPACE
// END_ISC_NAMESPACE
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