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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.
#include <util/buffer.h>
#include <util/encode/hex.h>
#include <dns/messagerenderer.h>
#include <dns/rdata.h>
#include <dns/rdataclass.h>
#include <dns/rdata/generic/detail/nsec3param_common.h>
#include <boost/lexical_cast.hpp>
#include <string>
#include <sstream>
#include <vector>
using namespace std;
using namespace isc::util;
using namespace isc::util::encode;
// 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)
{}
const uint8_t hashalg_;
const uint8_t flags_;
const uint16_t iterations_;
const vector<uint8_t> salt_;
};
NSEC3PARAM::NSEC3PARAM(const std::string& nsec3param_str) :
impl_(NULL)
{
istringstream iss(nsec3param_str);
vector<uint8_t> salt;
const ParseNSEC3ParamResult params =
parseNSEC3ParamText("NSEC3PARAM", nsec3param_str, iss, salt);
if (!iss.eof()) {
isc_throw(InvalidRdataText, "Invalid NSEC3PARAM (redundant text): "
<< nsec3param_str);
}
impl_ = new NSEC3PARAMImpl(params.algorithm, params.flags,
params.iterations, salt);
}
NSEC3PARAM::NSEC3PARAM(InputBuffer& buffer, size_t rdata_len) {
vector<uint8_t> salt;
const ParseNSEC3ParamResult params =
parseNSEC3ParamWire("NSEC3PARAM", buffer, rdata_len, salt);
impl_ = new NSEC3PARAMImpl(params.algorithm, params.flags,
params.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 boost::lexical_cast;
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_)) +
" " + (impl_->salt_.empty() ? "-" : encodeHex(impl_->salt_)));
}
template <typename OUTPUT_TYPE>
void
toWireHelper(const NSEC3PARAMImpl& impl, OUTPUT_TYPE& output) {
output.writeUint8(impl.hashalg_);
output.writeUint8(impl.flags_);
output.writeUint16(impl.iterations_);
output.writeUint8(impl.salt_.size());
if (!impl.salt_.empty()) {
output.writeData(&impl.salt_[0], impl.salt_.size());
}
}
void
NSEC3PARAM::toWire(OutputBuffer& buffer) const {
toWireHelper(*impl_, buffer);
}
void
NSEC3PARAM::toWire(AbstractMessageRenderer& renderer) const {
toWireHelper(*impl_, renderer);
}
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);
}
const size_t this_len = impl_->salt_.size();
const size_t other_len = other_param.impl_->salt_.size();
if (this_len != other_len) {
return (this_len - other_len);
}
const size_t cmplen = min(this_len, other_len);
const int cmp = (cmplen == 0) ? 0 :
memcmp(&impl_->salt_.at(0), &other_param.impl_->salt_.at(0), cmplen);
if (cmp != 0) {
return (cmp);
} else {
return (this_len - other_len);
}
}
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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