[master] Merge branch 'trac1638'

src/lib/dns/Makefile.am

@@ -23,6 +23,8 @@ EXTRA_DIST += rdata/generic/cname_5.cc
 EXTRA_DIST += rdata/generic/cname_5.h
 EXTRA_DIST += rdata/generic/detail/nsec_bitmap.cc
 EXTRA_DIST += rdata/generic/detail/nsec_bitmap.h
+EXTRA_DIST += rdata/generic/detail/nsec3param_common.cc
+EXTRA_DIST += rdata/generic/detail/nsec3param_common.h
 EXTRA_DIST += rdata/generic/detail/txt_like.h
 EXTRA_DIST += rdata/generic/detail/ds_like.h
 EXTRA_DIST += rdata/generic/dlv_32769.cc
@@ -113,6 +115,8 @@ libdns___la_SOURCES += tsigrecord.h tsigrecord.cc
 libdns___la_SOURCES += character_string.h character_string.cc
 libdns___la_SOURCES += rdata/generic/detail/nsec_bitmap.h
 libdns___la_SOURCES += rdata/generic/detail/nsec_bitmap.cc
+libdns___la_SOURCES += rdata/generic/detail/nsec3param_common.cc
+libdns___la_SOURCES += rdata/generic/detail/nsec3param_common.h
 libdns___la_SOURCES += rdata/generic/detail/txt_like.h
 libdns___la_SOURCES += rdata/generic/detail/ds_like.h
 

src/lib/dns/rdata/generic/detail/nsec3param_common.cc

@@ -0,0 +1,130 @@
+// Copyright (C) 2012  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 <exceptions/exceptions.h>
+
+#include <util/encode/hex.h>
+#include <util/buffer.h>
+
+#include <dns/exceptions.h>
+#include <dns/rdata.h>
+#include <dns/rdata/generic/detail/nsec3param_common.h>
+
+#include <boost/lexical_cast.hpp>
+
+#include <sstream>
+#include <vector>
+#include <stdint.h>
+
+using namespace std;
+using namespace isc::util;
+using namespace isc::util::encode;
+
+namespace isc {
+namespace dns {
+namespace rdata {
+namespace generic {
+namespace detail {
+namespace nsec3 {
+
+ParseNSEC3ParamResult
+parseNSEC3ParamText(const char* const rrtype_name,
+                    const string& rdata_str, istringstream& iss,
+                    vector<uint8_t>& salt)
+{
+    unsigned int hashalg, flags, iterations;
+    string iterations_str, salthex;
+
+    iss >> hashalg >> flags >> iterations_str >> salthex;
+    if (iss.bad() || iss.fail()) {
+        isc_throw(InvalidRdataText, "Invalid " << rrtype_name <<
+                  " text: " << rdata_str);
+    }
+    if (hashalg > 0xff) {
+        isc_throw(InvalidRdataText, rrtype_name <<
+                  " hash algorithm out of range: " << hashalg);
+    }
+    if (flags > 0xff) {
+        isc_throw(InvalidRdataText, rrtype_name << " flags out of range: " <<
+                  flags);
+    }
+    // Convert iteration.  To reject an invalid case where there's no space
+    // between iteration and salt, we extract this field as string and convert
+    // to integer.
+    try {
+        iterations = boost::lexical_cast<unsigned int>(iterations_str);
+    } catch (const boost::bad_lexical_cast&) {
+        isc_throw(InvalidRdataText, "Bad " << rrtype_name <<
+                  " iteration: " << iterations_str);
+    }
+    if (iterations > 0xffff) {
+        isc_throw(InvalidRdataText, rrtype_name <<
+                  " iterations out of range: " <<
+            iterations);
+    }
+
+    // Salt is up to 255 bytes, and space is not allowed in the HEX encoding,
+    // so the encoded string cannot be longer than the double of max length
+    // of the actual salt.
+    if (salthex.size() > 255 * 2) {
+        isc_throw(InvalidRdataText, rrtype_name << " salt is too long: "
+                  << salthex.size() << " (encoded) bytes");
+    }
+    if (salthex != "-") {       // "-" means a 0-length salt
+        decodeHex(salthex, salt);
+    }
+
+    return (ParseNSEC3ParamResult(hashalg, flags, iterations));
+}
+
+ParseNSEC3ParamResult
+parseNSEC3ParamWire(const char* const rrtype_name,
+                    InputBuffer& buffer,
+                    size_t& rdata_len, std::vector<uint8_t>& salt)
+{
+    // NSEC3/NSEC3PARAM RR must have at least 5 octets:
+    // hash algorithm(1), flags(1), iteration(2), saltlen(1)
+    if (rdata_len < 5) {
+        isc_throw(DNSMessageFORMERR, rrtype_name << " too short, length: "
+                  << rdata_len);
+    }
+
+    const uint8_t hashalg = buffer.readUint8();
+    const uint8_t flags = buffer.readUint8();
+    const uint16_t iterations = buffer.readUint16();
+
+    const uint8_t saltlen = buffer.readUint8();
+    rdata_len -= 5;
+    if (rdata_len < saltlen) {
+        isc_throw(DNSMessageFORMERR, rrtype_name <<
+                  " salt length is too large: " <<
+                  static_cast<unsigned int>(saltlen));
+    }
+
+    salt.resize(saltlen);
+    if (saltlen > 0) {
+        buffer.readData(&salt[0], saltlen);
+        rdata_len -= saltlen;
+    }
+
+    return (ParseNSEC3ParamResult(hashalg, flags, iterations));
+}
+
+} // end of nsec3
+} // end of detail
+} // end of generic
+} // end of rdata
+} // end of dns
+} // end of isc
+

src/lib/dns/rdata/generic/detail/nsec3param_common.h

@@ -0,0 +1,134 @@
+// Copyright (C) 2012  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.
+
+#ifndef __NSEC3PARAM_COMMON_H
+#define __NSEC3PARAM_COMMON_H 1
+
+#include <util/buffer.h>
+
+#include <stdint.h>
+
+#include <sstream>
+#include <string>
+#include <vector>
+
+namespace isc {
+namespace dns {
+namespace rdata {
+namespace generic {
+namespace detail {
+namespace nsec3 {
+
+/// \file
+///
+/// This helper module provides some utilities that handle NSEC3 and
+/// NSEC3PARAM RDATA.  They share the first few fields, and some operations
+/// on these fields are sufficiently complicated, so it would make sense to
+/// consolidate the processing logic into a single implementation module.
+///
+/// The functions defined here are essentially private and are only expected
+/// to be called from the \c NSEC3 and \c NSEC3PARAM class implementations.
+
+/// \brief Result values of the utilities.
+///
+/// This structure encapsulates a tuple of NSEC3/NSEC3PARAM algorithm,
+/// flags and iterations field values.  This is used as the return value
+/// of the utility functions defined in this module so the caller can
+/// use it for constructing the corresponding RDATA.
+struct ParseNSEC3ParamResult {
+    ParseNSEC3ParamResult(uint8_t param_algorithm, uint8_t param_flags,
+                          uint16_t param_iterations) :
+        algorithm(param_algorithm), flags(param_flags),
+        iterations(param_iterations)
+    {}
+    const uint8_t algorithm;
+    const uint8_t flags;
+    const uint16_t iterations;
+};
+
+/// \brief Convert textual representation of NSEC3 parameters.
+///
+/// This function takes an input string stream that consists of a complete
+/// textual representation of an NSEC3 or NSEC3PARAM RDATA and parses it
+/// extracting the hash algorithm, flags, iterations, and salt fields.
+///
+/// The first three fields are returned as the return value of this function.
+/// The salt will be stored in the given vector.  The vector is expected
+/// to be empty, but if not, the existing content will be overridden.
+///
+/// On successful return the given input stream will reach the end of the
+/// salt field.
+///
+/// \exception isc::BadValue The salt is not a valid hex string.
+/// \exception InvalidRdataText The given string is otherwise invalid for
+/// NSEC3 or NSEC3PARAM fields.
+///
+/// \param rrtype_name Either "NSEC3" or "NSEC3PARAM"; used as part of
+/// exception messages.
+/// \param rdata_str A complete textual string of the RDATA; used as part of
+/// exception messages.
+/// \param iss Input stream that consists of a complete textual string of
+/// the RDATA.
+/// \param salt A placeholder for the salt field value of the RDATA.
+/// Expected to be empty, but it's not checked (and will be overridden).
+///
+/// \return The hash algorithm, flags, iterations in the form of
+/// ParseNSEC3ParamResult.
+ParseNSEC3ParamResult parseNSEC3ParamText(const char* const rrtype_name,
+                                          const std::string& rdata_str,
+                                          std::istringstream& iss,
+                                          std::vector<uint8_t>& salt);
+
+/// \brief Extract NSEC3 parameters from wire-format data.
+///
+/// This function takes an input buffer that stores wire-format NSEC3 or
+/// NSEC3PARAM RDATA and parses it extracting the hash algorithm, flags,
+/// iterations, and salt fields.
+///
+/// The first three fields are returned as the return value of this function.
+/// The salt will be stored in the given vector.  The vector is expected
+/// to be empty, but if not, the existing content will be overridden.
+///
+/// On successful return the input buffer will point to the end of the
+/// salt field; rdata_len will be the length of the rest of RDATA
+/// (in the case of a valid NSEC3PARAM, it should be 0).
+///
+/// \exception DNSMessageFORMERR The wire data is invalid.
+///
+/// \param rrtype_name Either "NSEC3" or "NSEC3PARAM"; used as part of
+/// exception messages.
+/// \param buffer An input buffer that stores wire-format RDATA.  It must
+/// point to the beginning of the data.
+/// \param rdata_len The total length of the RDATA.
+/// \param salt A placeholder for the salt field value of the RDATA.
+/// Expected to be empty, but it's not checked (and will be overridden).
+///
+/// \return The hash algorithm, flags, iterations in the form of
+/// ParseNSEC3ParamResult.
+ParseNSEC3ParamResult parseNSEC3ParamWire(const char* const rrtype_name,
+                                          isc::util::InputBuffer& buffer,
+                                          size_t& rdata_len,
+                                          std::vector<uint8_t>& salt);
+}
+}
+}
+}
+}
+}
+
+#endif  // __NSEC3PARAM_COMMON_H
+
+// Local Variables:
+// mode: c++
+// End:

src/lib/dns/rdata/generic/detail/nsec_bitmap.h

@@ -12,6 +12,9 @@
 // OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 // PERFORMANCE OF THIS SOFTWARE.
 
+#ifndef __NSECBITMAP_H
+#define __NSECBITMAP_H 1
+
 #include <stdint.h>
 
 #include <sstream>
@@ -97,6 +100,8 @@ void bitmapsToText(const std::vector<uint8_t>& typebits,
 }
 }
 
+#endif  // __NSECBITMAP_H
+
 // Local Variables:
 // mode: c++
 // End:

src/lib/dns/rdata/generic/nsec3_50.cc

@@ -17,6 +17,7 @@
 #include <string>
 #include <sstream>
 #include <vector>
+#include <cassert>
 
 #include <boost/lexical_cast.hpp>
 
@@ -32,12 +33,14 @@
 #include <dns/rdata.h>
 #include <dns/rdataclass.h>
 #include <dns/rdata/generic/detail/nsec_bitmap.h>
+#include <dns/rdata/generic/detail/nsec3param_common.h>
 
 #include <stdio.h>
 #include <time.h>
 
 using namespace std;
 using namespace isc::dns::rdata::generic::detail::nsec;
+using namespace isc::dns::rdata::generic::detail::nsec3;
 using namespace isc::util::encode;
 using namespace isc::util;
 
@@ -65,42 +68,20 @@ NSEC3::NSEC3(const string& nsec3_str) :
     impl_(NULL)
 {
     istringstream iss(nsec3_str);
-    unsigned int hashalg, flags, iterations;
-    string iterations_str, salthex, nexthash;
+    vector<uint8_t> salt;
+    const ParseNSEC3ParamResult params =
+        parseNSEC3ParamText("NSEC3", nsec3_str, iss, salt);
 
-    iss >> hashalg >> flags >> iterations_str >> salthex >> nexthash;
+    // Extract Next hash.  It must be an unpadded base32hex string.
+    string nexthash;
+    iss >> nexthash;
     if (iss.bad() || iss.fail()) {
         isc_throw(InvalidRdataText, "Invalid NSEC3 text: " << nsec3_str);
     }
-    if (hashalg > 0xff) {
-        isc_throw(InvalidRdataText,
-                  "NSEC3 hash algorithm out of range: " << hashalg);
-    }
-    if (flags > 0xff) {
-        isc_throw(InvalidRdataText, "NSEC3 flags out of range: " << flags);
-    }
-    // Convert iteration.  To reject an invalid case where there's no space
-    // between iteration and salt, we extract this field as string and convert
-    // to integer.
-    try {
-        iterations = boost::lexical_cast<unsigned int>(iterations_str);
-    } catch (const boost::bad_lexical_cast&) {
-        isc_throw(InvalidRdataText, "Bad NSEC3 iteration: " << iterations_str);
+    assert(!nexthash.empty());
+    if (*nexthash.rbegin() == '=') {
+        isc_throw(InvalidRdataText, "NSEC3 hash has padding: " << nsec3_str);
     }
-    if (iterations > 0xffff) {
-        isc_throw(InvalidRdataText, "NSEC3 iterations out of range: " <<
-            iterations);
-    }
-
-    vector<uint8_t> salt;
-    if (salthex != "-") {       // "-" means a 0-length salt
-        decodeHex(salthex, salt);
-    }
-    if (salt.size() > 255) {
-        isc_throw(InvalidRdataText, "NSEC3 salt is too long: "
-                  << salt.size() << " bytes");
-    }
-
     vector<uint8_t> next;
     decodeBase32Hex(nexthash, next);
     if (next.size() > 255) {
@@ -110,7 +91,8 @@ NSEC3::NSEC3(const string& nsec3_str) :
 
     // For NSEC3 empty bitmap is possible and allowed.
     if (iss.eof()) {
-        impl_ = new NSEC3Impl(hashalg, flags, iterations, salt, next,
+        impl_ = new NSEC3Impl(params.algorithm, params.flags,
+                              params.iterations, salt, next,
                               vector<uint8_t>());
         return;
     }
@@ -118,36 +100,18 @@ NSEC3::NSEC3(const string& nsec3_str) :
     vector<uint8_t> typebits;
     buildBitmapsFromText("NSEC3", iss, typebits);
 
-    impl_ = new NSEC3Impl(hashalg, flags, iterations, salt, next, typebits);
+    impl_ = new NSEC3Impl(params.algorithm, params.flags, params.iterations,
+                          salt, next, typebits);
 }
 
 NSEC3::NSEC3(InputBuffer& buffer, size_t rdata_len) {
-    // NSEC3 RR must have at least 5 octets:
-    // hash algorithm(1), flags(1), iteration(2), saltlen(1)
-    if (rdata_len < 5) {
-        isc_throw(DNSMessageFORMERR, "NSEC3 too short, length: " << rdata_len);
-    }
-
-    const uint8_t hashalg = buffer.readUint8();
-    const uint8_t flags = buffer.readUint8();
-    const uint16_t iterations = buffer.readUint16();
-
-    const uint8_t saltlen = buffer.readUint8();
-    rdata_len -= 5;
-    if (rdata_len < saltlen) {
-        isc_throw(DNSMessageFORMERR, "NSEC3 salt length is too large: " <<
-                  static_cast<unsigned int>(saltlen));
-    }
-
-    vector<uint8_t> salt(saltlen);
-    if (saltlen > 0) {
-        buffer.readData(&salt[0], saltlen);
-        rdata_len -= saltlen;
-    }
+    vector<uint8_t> salt;
+    const ParseNSEC3ParamResult params =
+        parseNSEC3ParamWire("NSEC3", buffer, rdata_len, salt);
 
     if (rdata_len < 1) {
         isc_throw(DNSMessageFORMERR, "NSEC3 too short to contain hash length, "
-                  "length: " << rdata_len + saltlen + 5);
+                  "length: " << rdata_len + salt.size() + 5);
     }
     const uint8_t nextlen = buffer.readUint8();
     --rdata_len;
@@ -168,7 +132,8 @@ NSEC3::NSEC3(InputBuffer& buffer, size_t rdata_len) {
         checkRRTypeBitmaps("NSEC3", typebits);
     }
 
-    impl_ = new NSEC3Impl(hashalg, flags, iterations, salt, next, typebits);
+    impl_ = new NSEC3Impl(params.algorithm, params.flags, params.iterations,
+                          salt, next, typebits);
 }
 
 NSEC3::NSEC3(const NSEC3& source) :
@@ -256,10 +221,10 @@ compareVectors(const vector<uint8_t>& v1, const vector<uint8_t>& v2,
 {
     const size_t len1 = v1.size();
     const size_t len2 = v2.size();
-    const size_t cmplen = min(len1, len2);
     if (check_length_first && len1 != len2) {
         return (len1 - len2);
     }
+    const size_t cmplen = min(len1, len2);
     const int cmp = cmplen == 0 ? 0 : memcmp(&v1.at(0), &v2.at(0), cmplen);
     if (cmp != 0) {
         return (cmp);

src/lib/dns/rdata/generic/nsec3param_51.cc

@@ -12,22 +12,19 @@
 // OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 // PERFORMANCE OF THIS SOFTWARE.
 
-#include <iostream>
-#include <string>
-#include <sstream>
-#include <vector>
-
-#include <boost/lexical_cast.hpp>
-
 #include <util/buffer.h>
 #include <util/encode/hex.h>
+
 #include <dns/messagerenderer.h>
-#include <dns/name.h>
 #include <dns/rdata.h>
 #include <dns/rdataclass.h>
+#include <dns/rdata/generic/detail/nsec3param_common.h>
+
+#include <boost/lexical_cast.hpp>
 
-#include <stdio.h>
-#include <time.h>
+#include <string>
+#include <sstream>
+#include <vector>
 
 using namespace std;
 using namespace isc::util;
@@ -43,9 +40,9 @@ struct NSEC3PARAMImpl {
         hashalg_(hashalg), flags_(flags), iterations_(iterations), salt_(salt)
     {}
 
-    uint8_t hashalg_;
-    uint8_t flags_;
-    uint16_t iterations_;
+    const uint8_t hashalg_;
+    const uint8_t flags_;
+    const uint16_t iterations_;
     const vector<uint8_t> salt_;
 };
 
@@ -53,50 +50,26 @@ 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");
-    }
-
-    const string salt_str = saltbuf.str();
     vector<uint8_t> salt;
-    if (salt_str != "-") { // "-" means an empty salt, no need to touch vector
-        decodeHex(saltbuf.str(), 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(hashalg, flags, iterations, salt);
+    impl_ = new NSEC3PARAMImpl(params.algorithm, params.flags,
+                               params.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);
+    vector<uint8_t> salt;
+    const ParseNSEC3ParamResult params =
+        parseNSEC3ParamWire("NSEC3PARAM", buffer, rdata_len, salt);
 
-    impl_ = new NSEC3PARAMImpl(hashalg, flags, iterations, salt);
+    impl_ = new NSEC3PARAMImpl(params.algorithm, params.flags,
+                               params.iterations, salt);
 }
 
 NSEC3PARAM::NSEC3PARAM(const NSEC3PARAM& source) :
@@ -124,27 +97,31 @@ 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_));
+            " " + 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 {
-    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());
+    toWireHelper(*impl_, buffer);
 }
 
 void
 NSEC3PARAM::toWire(AbstractMessageRenderer& 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());
+    toWireHelper(*impl_, renderer);
 }
 
 int
@@ -161,15 +138,18 @@ NSEC3PARAM::compare(const Rdata& other) const {
         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);
+    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) ? 0 : (this_len < other_len) ? -1 : 1);
+        return (this_len - other_len);
     }
 }
 
@@ -193,6 +173,5 @@ NSEC3PARAM::getSalt() const {
     return (impl_->salt_);
 }
 
-
 // END_RDATA_NAMESPACE
 // END_ISC_NAMESPACE

src/lib/dns/tests/Makefile.am

@@ -43,6 +43,7 @@ run_unittests_SOURCES += rdata_nsec_unittest.cc
 run_unittests_SOURCES += rdata_nsec3_unittest.cc
 run_unittests_SOURCES += rdata_nsecbitmap_unittest.cc
 run_unittests_SOURCES += rdata_nsec3param_unittest.cc
+run_unittests_SOURCES += rdata_nsec3param_like_unittest.cc
 run_unittests_SOURCES += rdata_rrsig_unittest.cc
 run_unittests_SOURCES += rdata_rp_unittest.cc
 run_unittests_SOURCES += rdata_srv_unittest.cc

src/lib/dns/tests/rdata_nsec3_unittest.cc

@@ -39,19 +39,19 @@ using namespace isc::util::encode;
 using namespace isc::dns::rdata;
 
 namespace {
+
+// Note: some tests can be shared with NSEC3PARAM.  They are unified as
+// typed tests defined in nsec3param_like_unittest.
 class Rdata_NSEC3_Test : public RdataTest {
     // there's nothing to specialize
 public:
     Rdata_NSEC3_Test() :
         nsec3_txt("1 1 1 D399EAAB H9RSFB7FPF2L8HG35CMPC765TDK23RP6 "
                   "NS SOA RRSIG DNSKEY NSEC3PARAM"),
-        nsec3_nosalt_txt("1 1 1 - H9RSFB7FPF2L8HG35CMPC765TDK23RP6 A" ),
-        obuffer(0), renderer(obuffer)
+        nsec3_nosalt_txt("1 1 1 - H9RSFB7FPF2L8HG35CMPC765TDK23RP6 A" )
     {}
     const string nsec3_txt;
     const string nsec3_nosalt_txt;
-    OutputBuffer obuffer;
-    MessageRenderer renderer;
 };
 
 TEST_F(Rdata_NSEC3_Test, fromText) {
@@ -59,20 +59,6 @@ TEST_F(Rdata_NSEC3_Test, fromText) {
     // text and construct nsec3_txt.  It will be tested against the wire format
     // representation in the createFromWire test.
 
-    // Numeric parameters have possible maximum values.  Unusual, but must
-    // be accepted.
-    EXPECT_NO_THROW(generic::NSEC3("255 255 65535 D399EAAB "
-                                   "H9RSFB7FPF2L8HG35CMPC765TDK23RP6 "
-                                   "NS SOA RRSIG DNSKEY NSEC3PARAM"));
-
-    // 0-length salt
-    EXPECT_EQ(0, generic::NSEC3(nsec3_nosalt_txt).getSalt().size());
-
-    // salt that has the possible max length
-    EXPECT_EQ(255, generic::NSEC3("1 1 1 " + string(255 * 2, '0') +
-                                  " H9RSFB7FPF2L8HG35CMPC765TDK23RP6 "
-                                  "NS").getSalt().size());
-
     // hash that has the possible max length (see badText about the magic
     // numbers)
     EXPECT_EQ(255, generic::NSEC3("1 1 1 D399EAAB " +
@@ -84,47 +70,20 @@ TEST_F(Rdata_NSEC3_Test, fromText) {
                         "1 1 1 D399EAAB H9RSFB7FPF2L8HG35CMPC765TDK23RP6"));
 }
 
-TEST_F(Rdata_NSEC3_Test, toText) {
-    // normal case
-    const generic::NSEC3 rdata_nsec3(nsec3_txt);
-    EXPECT_EQ(nsec3_txt, rdata_nsec3.toText());
-
-    // empty salt case
-    EXPECT_EQ(nsec3_nosalt_txt, generic::NSEC3(nsec3_nosalt_txt).toText());
-}
-
 TEST_F(Rdata_NSEC3_Test, badText) {
     EXPECT_THROW(generic::NSEC3("1 1 1 ADDAFEEE "
                                 "0123456789ABCDEFGHIJKLMNOPQRSTUV "
                                 "BIFF POW SPOON"),
                  InvalidRdataText);
-    EXPECT_THROW(generic::NSEC3("1 1 1 ADDAFEE "
-                                "WXYZWXYZWXYZ=WXYZWXYZ==WXYZWXYZW A NS SOA"),
-                 BadValue);     // bad hex
-    EXPECT_THROW(generic::NSEC3("1 1 1 -- H9RSFB7FPF2L8HG35CMPC765TDK23RP6 "
-                                "A"),
-                 BadValue); // this shouldn't be confused a valid empty salt
     EXPECT_THROW(generic::NSEC3("1 1 1 ADDAFEEE "
                                 "WXYZWXYZWXYZ=WXYZWXYZ==WXYZWXYZW A NS SOA"),
                  BadValue);     // bad base32hex
-    EXPECT_THROW(generic::NSEC3("1000000 1 1 ADDAFEEE "
-                                "0123456789ABCDEFGHIJKLMNOPQRSTUV A NS SOA"),
-                 InvalidRdataText);
-    EXPECT_THROW(generic::NSEC3("1 1000000 1 ADDAFEEE "
-                                "0123456789ABCDEFGHIJKLMNOPQRSTUV A NS SOA"),
-                 InvalidRdataText);
     EXPECT_THROW(generic::NSEC3("1 1 1000000 ADDAFEEE "
                                 "0123456789ABCDEFGHIJKLMNOPQRSTUV A NS SOA"),
                  InvalidRdataText);
 
-    // There should be a space between "1" and "D399EAAB" (salt)
-    EXPECT_THROW(generic::NSEC3(
-                     "1 1 1D399EAAB H9RSFB7FPF2L8HG35CMPC765TDK23RP6 "
-                     "NS SOA RRSIG DNSKEY NSEC3PARAM"), InvalidRdataText);
-
-    // Salt is too long (possible max + 1 bytes)
-    EXPECT_THROW(generic::NSEC3("1 1 1 " + string(256 * 2, '0') +
-                                " H9RSFB7FPF2L8HG35CMPC765TDK23RP6 NS"),
+    // Next hash shouldn't be padded
+    EXPECT_THROW(generic::NSEC3("1 1 1 ADDAFEEE CPNMU=== A NS SOA"),
                  InvalidRdataText);
 
     // Hash is too long.  Max = 255 bytes, base32-hex converts each 5 bytes
@@ -136,34 +95,12 @@ TEST_F(Rdata_NSEC3_Test, badText) {
 }
 
 TEST_F(Rdata_NSEC3_Test, createFromWire) {
-    // Normal case
-    const generic::NSEC3 rdata_nsec3(nsec3_txt);
-    EXPECT_EQ(0, rdata_nsec3.compare(
-                  *rdataFactoryFromFile(RRType::NSEC3(), RRClass::IN(),
-                                        "rdata_nsec3_fromWire1")));
-
     // A valid NSEC3 RR with empty type bitmap.
     EXPECT_NO_THROW(rdataFactoryFromFile(RRType::NSEC3(), RRClass::IN(),
                                          "rdata_nsec3_fromWire15.wire"));
 
-    // Too short RDLENGTH: it doesn't even contain the first 5 octets.
-    EXPECT_THROW(rdataFactoryFromFile(RRType::NSEC3(), RRClass::IN(),
-                                      "rdata_nsec3_fromWire2.wire"),
-                 DNSMessageFORMERR);
-
     // Invalid bitmap cases are tested in Rdata_NSECBITMAP_Test.
 
-    // salt length is too large
-    EXPECT_THROW(rdataFactoryFromFile(RRType::NSEC3(), RRClass::IN(),
-                                      "rdata_nsec3_fromWire11.wire"),
-                 DNSMessageFORMERR);
-
-    // empty salt.  unusual, but valid.
-    ConstRdataPtr rdata =
-        rdataFactoryFromFile(RRType::NSEC3(), RRClass::IN(),
-                             "rdata_nsec3_fromWire13.wire");
-    EXPECT_EQ(0, dynamic_cast<const generic::NSEC3&>(*rdata).getSalt().size());
-
     // hash length is too large
     EXPECT_THROW(rdataFactoryFromFile(RRType::NSEC3(), RRClass::IN(),
                                       "rdata_nsec3_fromWire12.wire"),
@@ -193,37 +130,6 @@ TEST_F(Rdata_NSEC3_Test, createFromWire) {
     }
 }
 
-template <typename OUTPUT_TYPE>
-void
-toWireCheck(OUTPUT_TYPE& output, const char* const data_file) {
-    vector<uint8_t> data;
-    UnitTestUtil::readWireData(data_file, data);
-    InputBuffer buffer(&data[0], data.size());
-    const uint16_t rdlen = buffer.readUint16();
-    const generic::NSEC3 nsec3 =
-        dynamic_cast<const generic::NSEC3&>(*createRdata(
-                                                RRType::NSEC3(), RRClass::IN(),
-                                                buffer, rdlen));
-
-    output.clear();
-    output.writeUint16(rdlen);
-    nsec3.toWire(output);
-    EXPECT_PRED_FORMAT4(UnitTestUtil::matchWireData, output.getData(),
-                        output.getLength(), &data[0], data.size());
-}
-
-TEST_F(Rdata_NSEC3_Test, toWire) {
-    // normal case
-    toWireCheck(renderer, "rdata_nsec3_fromWire1");
-    toWireCheck(obuffer, "rdata_nsec3_fromWire1");
-
-    // empty salt
-    toWireCheck(renderer, "rdata_nsec3_fromWire13.wire");
-    toWireCheck(obuffer, "rdata_nsec3_fromWire13.wire");
-
-    // empty bitmap case is handled in the bitmap tests
-}
-
 TEST_F(Rdata_NSEC3_Test, assign) {
     generic::NSEC3 rdata_nsec3(nsec3_txt);
     generic::NSEC3 other_nsec3 = rdata_nsec3;
@@ -240,14 +146,8 @@ TEST_F(Rdata_NSEC3_Test, compare) {
 
     // test RDATAs, sorted in the ascendent order.  We only check comparison
     // on NSEC3-specific fields.  Bitmap comparison is tested in the bitmap
-    // tests.
+    // tests.  Common cases for NSEC3 and NSECPARAM3 are in their shared tests.
     vector<generic::NSEC3> compare_set;
-    compare_set.push_back(generic::NSEC3("0 0 0 D399EAAB D1K6GQ38"));
-    compare_set.push_back(generic::NSEC3("1 0 0 D399EAAB D1K6GQ38"));
-    compare_set.push_back(generic::NSEC3("1 1 0 D399EAAB D1K6GQ38"));
-    compare_set.push_back(generic::NSEC3("1 1 1 - D1K6GQ38"));
-    compare_set.push_back(generic::NSEC3("1 1 1 D399EAAB D1K6GQ38"));
-    compare_set.push_back(generic::NSEC3("1 1 1 FF99EAAB D1K6GQ38"));
     compare_set.push_back(generic::NSEC3("1 1 1 FF99EA0000 D1K6GQ38"));
     compare_set.push_back(generic::NSEC3("1 1 1 FF99EA0000 D1K6GQ0000000000"));
     compare_set.push_back(generic::NSEC3("1 1 1 FF99EA0000 D1K6GQ00UUUUUUUU"));

src/lib/dns/tests/rdata_nsec3param_like_unittest.cc

@@ -0,0 +1,260 @@
+// Copyright (C) 2012  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 <dns/exceptions.h>
+#include <dns/rdata.h>
+#include <dns/rdataclass.h>
+#include <dns/rrclass.h>
+#include <dns/rrtype.h>
+
+#include <gtest/gtest.h>
+
+#include <dns/tests/unittest_util.h>
+#include <dns/tests/rdata_unittest.h>
+
+#include <string>
+#include <vector>
+
+using namespace std;
+using isc::UnitTestUtil;
+using namespace isc::dns;
+using namespace isc::dns::rdata;
+
+namespace {
+
+// Template for shared tests for NSEC3 and NSEC3PARAM
+template <typename RDATA_TYPE>
+class NSEC3PARAMLikeTest : public RdataTest {
+protected:
+    NSEC3PARAMLikeTest() :
+        salt_txt("1 1 1 D399EAAB" + getCommonText()),
+        nosalt_txt("1 1 1 -" + getCommonText()),
+        obuffer(0), renderer(obuffer)
+    {}
+
+    RDATA_TYPE fromText(const string& rdata_text) {
+        return (RDATA_TYPE(rdata_text));
+    }
+
+    void compareCheck() const {
+        typename vector<RDATA_TYPE>::const_iterator it;
+        typename vector<RDATA_TYPE>::const_iterator const it_end =
+            compare_set.end();
+        for (it = compare_set.begin(); it != it_end - 1; ++it) {
+            SCOPED_TRACE("compare " + it->toText() + " to " +
+                         (it + 1)->toText());
+            EXPECT_GT(0, (*it).compare(*(it + 1)));
+            EXPECT_LT(0, (*(it + 1)).compare(*it));
+        }
+    }
+
+    const string salt_txt;      // RDATA text with salt
+    const string nosalt_txt;    // RDATA text without salt
+    OutputBuffer obuffer;       // used in toWire() tests
+    MessageRenderer renderer;   // ditto
+    vector<RDATA_TYPE> compare_set; // used in compare() tests
+
+    // Convert generic Rdata to the corresponding derived Rdata class object.
+    // Defined here because it depends on the template parameter.
+    static const RDATA_TYPE& convert(const Rdata& rdata) {
+        return (dynamic_cast<const RDATA_TYPE&>(rdata));
+    }
+
+    // These depend on the specific RR type.  We use specialized methods
+    // for them.
+    static RRType getType(); // return either RRType::NSEC3() or NSEC3PARAM()
+    static string getWireFilePrefix();
+    static string getCommonText(); // commonly used part of textual form
+};
+
+// Instantiate specific typed tests
+typedef ::testing::Types<generic::NSEC3, generic::NSEC3PARAM> TestRdataTypes;
+TYPED_TEST_CASE(NSEC3PARAMLikeTest, TestRdataTypes);
+
+template <>
+RRType
+NSEC3PARAMLikeTest<generic::NSEC3>::getType() {
+    return (RRType::NSEC3());
+}
+
+template <>
+RRType
+NSEC3PARAMLikeTest<generic::NSEC3PARAM>::getType() {
+    return (RRType::NSEC3PARAM());
+}
+
+template <>
+string
+NSEC3PARAMLikeTest<generic::NSEC3>::getWireFilePrefix() {
+    return ("rdata_nsec3_");
+}
+
+template <>
+string
+NSEC3PARAMLikeTest<generic::NSEC3PARAM>::getWireFilePrefix() {
+    return ("rdata_nsec3param_");
+}
+
+template <>
+string
+NSEC3PARAMLikeTest<generic::NSEC3>::getCommonText() {
+    // next hash + RR type bitmap
+    return (" H9RSFB7FPF2L8HG35CMPC765TDK23RP6 "
+            "NS SOA RRSIG DNSKEY NSEC3PARAM");
+}
+
+template <>
+string
+NSEC3PARAMLikeTest<generic::NSEC3PARAM>::getCommonText() {
+    // there's no more text for NSEC3PARAM
+    return ("");
+}
+
+TYPED_TEST(NSEC3PARAMLikeTest, fromText) {
+    // Numeric parameters have possible maximum values.  Unusual, but must
+    // be accepted.
+    EXPECT_NO_THROW(this->fromText("255 255 65535 D399EAAB" +
+                                   this->getCommonText()));
+
+    // 0-length salt
+    EXPECT_EQ(0, this->fromText(this->nosalt_txt).getSalt().size());
+
+    // salt that has the possible max length
+    EXPECT_EQ(255, this->fromText("1 1 1 " + string(255 * 2, '0') +
+                                  this->getCommonText()).getSalt().size());
+}
+
+TYPED_TEST(NSEC3PARAMLikeTest, badText) {
+    // Bad salt hex
+    EXPECT_THROW(this->fromText("1 1 1 SPORK0" + this->getCommonText()),
+                 isc::BadValue);
+    EXPECT_THROW(this->fromText("1 1 1 ADDAFEE" + this->getCommonText()),
+                 isc::BadValue);
+
+    // Space within salt
+    EXPECT_THROW(this->fromText("1 1 1 ADDAFE ADDAFEEE" +
+                                this->getCommonText()),
+                 InvalidRdataText);
+
+    // Similar to empty salt, but not really.  This shouldn't cause confusion.
+    EXPECT_THROW(this->fromText("1 1 1 --" + this->getCommonText()),
+                 isc::BadValue);
+
+    // Too large algorithm
+    EXPECT_THROW(this->fromText("1000000 1 1 ADDAFEEE" + this->getCommonText()),
+                 InvalidRdataText);
+
+    // Too large flags
+    EXPECT_THROW(this->fromText("1 1000000 1 ADDAFEEE" + this->getCommonText()),
+                 InvalidRdataText);
+
+    // Too large iterations
+    EXPECT_THROW(this->fromText("1 1 65536 ADDAFEEE" + this->getCommonText()),
+                 InvalidRdataText);
+
+    // There should be a space between "1" and "D399EAAB" (salt)
+    EXPECT_THROW(this->fromText("1 1 1D399EAAB" + this->getCommonText()),
+                 InvalidRdataText);
+
+    // Salt is too long (possible max + 1 bytes)
+    EXPECT_THROW(this->fromText("1 1 1 " + string(256 * 2, '0') +
+                                this->getCommonText()),
+                 InvalidRdataText);
+}
+
+TYPED_TEST(NSEC3PARAMLikeTest, toText) {
+    // normal case
+    EXPECT_EQ(this->salt_txt, this->fromText(this->salt_txt).toText());
+
+    // empty salt case
+    EXPECT_EQ(this->nosalt_txt, this->fromText(this->nosalt_txt).toText());
+}
+
+TYPED_TEST(NSEC3PARAMLikeTest, createFromWire) {
+    // Normal case
+    EXPECT_EQ(0, this->fromText(this->salt_txt).compare(
+                  *this->rdataFactoryFromFile(this->getType(), RRClass::IN(),
+                                              (this->getWireFilePrefix() +
+                                               "fromWire1").c_str())));
+
+    // Too short RDLENGTH: it doesn't even contain the first 5 octets.
+    EXPECT_THROW(this->rdataFactoryFromFile(this->getType(), RRClass::IN(),
+                                            (this->getWireFilePrefix() +
+                                             "fromWire2.wire").c_str()),
+                 DNSMessageFORMERR);
+
+    // salt length is too large
+    EXPECT_THROW(this->rdataFactoryFromFile(this->getType(), RRClass::IN(),
+                                            (this->getWireFilePrefix() +
+                                             "fromWire11.wire").c_str()),
+                 DNSMessageFORMERR);
+
+    // empty salt.  not so usual, but valid.
+    ConstRdataPtr rdata =
+        this->rdataFactoryFromFile(this->getType(), RRClass::IN(),
+                                   (this->getWireFilePrefix() +
+                                    "fromWire13.wire").c_str());
+    EXPECT_EQ(0, this->convert(*rdata).getSalt().size());
+}
+
+template <typename OUTPUT_TYPE>
+void
+toWireCheck(RRType rrtype, OUTPUT_TYPE& output, const string& data_file) {
+    vector<uint8_t> data;
+    UnitTestUtil::readWireData(data_file.c_str(), data);
+    InputBuffer buffer(&data[0], data.size());
+    const uint16_t rdlen = buffer.readUint16();
+
+    output.clear();
+    output.writeUint16(rdlen);
+    createRdata(rrtype, RRClass::IN(), buffer, rdlen)->toWire(output);
+    EXPECT_PRED_FORMAT4(UnitTestUtil::matchWireData, output.getData(),
+                        output.getLength(), &data[0], data.size());
+}
+
+TYPED_TEST(NSEC3PARAMLikeTest, toWire) {
+    // normal case
+    toWireCheck(this->getType(), this->renderer,
+                this->getWireFilePrefix() + "fromWire1");
+    toWireCheck(this->getType(), this->obuffer,
+                this->getWireFilePrefix() + "fromWire1");
+
+    // empty salt
+    toWireCheck(this->getType(), this->renderer,
+                this->getWireFilePrefix() + "fromWire13.wire");
+    toWireCheck(this->getType(), this->obuffer,
+                this->getWireFilePrefix() + "fromWire13.wire");
+}
+
+TYPED_TEST(NSEC3PARAMLikeTest, compare) {
+    // test RDATAs, sorted in the ascendent order.
+    this->compare_set.push_back(this->fromText("0 0 0 D399EAAB" +
+                                               this->getCommonText()));
+    this->compare_set.push_back(this->fromText("1 0 0 D399EAAB" +
+                                               this->getCommonText()));
+    this->compare_set.push_back(this->fromText("1 1 0 D399EAAB" +
+                                               this->getCommonText()));
+    this->compare_set.push_back(this->fromText("1 1 1 -" +
+                                               this->getCommonText()));
+    this->compare_set.push_back(this->fromText("1 1 1 D399EAAB" +
+                                               this->getCommonText()));
+    this->compare_set.push_back(this->fromText("1 1 1 FF99EAAB" +
+                                               this->getCommonText()));
+    this->compare_set.push_back(this->fromText("1 1 1 FF99EA0000" +
+                                               this->getCommonText()));
+
+    this->compareCheck();
+}
+
+}

src/lib/dns/tests/rdata_nsec3param_unittest.cc

@@ -41,14 +41,14 @@ using namespace isc::dns::rdata;
 namespace {
 class Rdata_NSEC3PARAM_Test : public RdataTest {
 public:
-    Rdata_NSEC3PARAM_Test() : nsec3param_txt("1 0 1 D399EAAB") {}
+    Rdata_NSEC3PARAM_Test() : nsec3param_txt("1 1 1 D399EAAB") {}
     const string nsec3param_txt;
 };
 
 TEST_F(Rdata_NSEC3PARAM_Test, fromText) {
     // With a salt
     EXPECT_EQ(1, generic::NSEC3PARAM(nsec3param_txt).getHashalg());
-    EXPECT_EQ(0, generic::NSEC3PARAM(nsec3param_txt).getFlags());
+    EXPECT_EQ(1, generic::NSEC3PARAM(nsec3param_txt).getFlags());
     // (salt is checked in the toText test)
 
     // With an empty salt
@@ -61,16 +61,9 @@ TEST_F(Rdata_NSEC3PARAM_Test, toText) {
 }
 
 TEST_F(Rdata_NSEC3PARAM_Test, badText) {
-    EXPECT_THROW(generic::NSEC3PARAM("1 1 1 SPORK"), BadValue); // bad hex
-    EXPECT_THROW(generic::NSEC3PARAM("100000 1 1 ADDAFEE"), InvalidRdataText);
-    EXPECT_THROW(generic::NSEC3PARAM("1 100000 1 ADDAFEE"), InvalidRdataText);
-    EXPECT_THROW(generic::NSEC3PARAM("1 1 100000 ADDAFEE"), InvalidRdataText);
-    EXPECT_THROW(generic::NSEC3PARAM("1"), InvalidRdataText);
-}
-
-TEST_F(Rdata_NSEC3PARAM_Test, DISABLED_badText) {
-    // this currently fails
-    EXPECT_THROW(generic::NSEC3PARAM("1 0 1D399EAAB"), InvalidRdataText);
+    // garbage space at the end
+    EXPECT_THROW(generic::NSEC3PARAM("1 1 1 D399EAAB "),
+                 InvalidRdataText);
 }
 
 TEST_F(Rdata_NSEC3PARAM_Test, createFromWire) {
@@ -78,6 +71,19 @@ TEST_F(Rdata_NSEC3PARAM_Test, createFromWire) {
     EXPECT_EQ(0, rdata_nsec3param.compare(
                   *rdataFactoryFromFile(RRType::NSEC3PARAM(), RRClass::IN(),
                                        "rdata_nsec3param_fromWire1")));
+
+    // Short buffer cases.  The data is valid NSEC3PARAM RDATA, but the buffer
+    // is trimmed at the end.  All cases should result in an exception from
+    // the buffer class.
+    vector<uint8_t> data;
+    UnitTestUtil::readWireData("rdata_nsec3param_fromWire1", data);
+    const uint16_t rdlen = (data.at(0) << 8) + data.at(1);
+    for (int i = 0; i < rdlen; ++i) {
+        // intentionally construct a short buffer
+        InputBuffer b(&data[0] + 2, i);
+        EXPECT_THROW(createRdata(RRType::NSEC3PARAM(), RRClass::IN(), b, 9),
+                     InvalidBufferPosition);
+    }
 }
 
 TEST_F(Rdata_NSEC3PARAM_Test, toWireRenderer) {
@@ -103,4 +109,16 @@ TEST_F(Rdata_NSEC3PARAM_Test, assign) {
     EXPECT_EQ(0, rdata_nsec3param.compare(other_nsec3param));
 }
 
+TEST_F(Rdata_NSEC3PARAM_Test, compare) {
+    // trivial case: self equivalence
+    EXPECT_EQ(0, generic::NSEC3PARAM(nsec3param_txt).
+              compare(generic::NSEC3PARAM(nsec3param_txt)));
+    EXPECT_EQ(0, generic::NSEC3PARAM("1 1 1 -").
+              compare(generic::NSEC3PARAM("1 1 1 -")));
+
+    // comparison attempt between incompatible RR types should be rejected
+    EXPECT_THROW(generic::NSEC3PARAM(nsec3param_txt).compare(*rdata_nomatch),
+                 bad_cast);
+}
+
 }

src/lib/dns/tests/testdata/Makefile.am

@@ -30,6 +30,9 @@ BUILT_SOURCES += rdata_nsec3_fromWire10.wire rdata_nsec3_fromWire11.wire
 BUILT_SOURCES += rdata_nsec3_fromWire12.wire rdata_nsec3_fromWire13.wire
 BUILT_SOURCES += rdata_nsec3_fromWire14.wire rdata_nsec3_fromWire15.wire
 BUILT_SOURCES += rdata_nsec3_fromWire16.wire rdata_nsec3_fromWire17.wire
+BUILT_SOURCES += rdata_nsec3param_fromWire2.wire
+BUILT_SOURCES += rdata_nsec3param_fromWire11.wire
+BUILT_SOURCES += rdata_nsec3param_fromWire13.wire
 BUILT_SOURCES += rdata_rrsig_fromWire2.wire
 BUILT_SOURCES += rdata_minfo_fromWire1.wire rdata_minfo_fromWire2.wire
 BUILT_SOURCES += rdata_minfo_fromWire3.wire rdata_minfo_fromWire4.wire
@@ -104,6 +107,9 @@ EXTRA_DIST += rdata_nsec_fromWire8.spec rdata_nsec_fromWire9.spec
 EXTRA_DIST += rdata_nsec_fromWire10.spec
 EXTRA_DIST += rdata_nsec_fromWire16.spec
 EXTRA_DIST += rdata_nsec3param_fromWire1
+EXTRA_DIST += rdata_nsec3param_fromWire2.spec
+EXTRA_DIST += rdata_nsec3param_fromWire11.spec
+EXTRA_DIST += rdata_nsec3param_fromWire13.spec
 EXTRA_DIST += rdata_nsec3_fromWire1
 EXTRA_DIST += rdata_nsec3_fromWire2.spec rdata_nsec3_fromWire3
 EXTRA_DIST += rdata_nsec3_fromWire4.spec rdata_nsec3_fromWire5.spec

src/lib/dns/tests/testdata/rdata_nsec3param_fromWire1

@@ -1,5 +1,5 @@
 # RDLENGTH, 9 bytes
 00 09
 # NSEC3PARAM record
-# 1 0 1 D399EAAB
-01 00 00 01 04 d3 99 ea ab
+# 1 1 1 D399EAAB
+01 01 00 01 04 d3 99 ea ab

src/lib/dns/tests/testdata/rdata_nsec3param_fromWire11.spec

@@ -0,0 +1,8 @@
+#
+# An invalid NSEC3PARAM RDATA: Saltlen is too large
+#
+
+[custom]
+sections: nsec3param
+[nsec3param]
+rdlen: 7

src/lib/dns/tests/testdata/rdata_nsec3param_fromWire13.spec

@@ -0,0 +1,9 @@
+#
+# A valid (but unusual) NSEC3PARAM RDATA: salt is empty.
+#
+
+[custom]
+sections: nsec3param
+[nsec3param]
+saltlen: 0
+salt: ''

src/lib/dns/tests/testdata/rdata_nsec3param_fromWire2.spec

@@ -0,0 +1,9 @@
+#
+# A malformed NSEC3PARAM RDATA: RDLEN indicates it doesn't even contain the
+# fixed 5 octects
+#
+
+[custom]
+sections: nsec3param
+[nsec3param]
+rdlen: 4

src/lib/util/python/gen_wiredata.py.in

@@ -949,12 +949,11 @@ class NSEC(NSECBASE):
                                                  int(len(name_wire) / 2)))
         f.write('%s\n' % name_wire)
 
-class NSEC3(NSECBASE):
-    '''Implements rendering NSEC3 RDATA in the test data format.
+class NSEC3PARAM(RR):
+    '''Implements rendering NSEC3PARAM RDATA in the test data format.
 
     Configurable parameters are as follows (see the description of the
     same name of attribute for the default value):
-    - Type bitmap related parameters: see class NSECBASE
     - hashalg (8-bit int): The Hash Algorithm field.  Note that
       currently the only defined algorithm is SHA-1, for which a value
       of 1 will be used, and it's the default.  So this implementation
@@ -967,9 +966,6 @@ class NSEC3(NSECBASE):
     - saltlen (int): The Salt Length field.
     - salt (string): The Salt field.  It is converted to a sequence of
       ascii codes and its hexadecimal representation will be used.
-    - hashlen (int): The Hash Length field.
-    - hash (string): The Next Hashed Owner Name field.  This parameter
-      is interpreted as "salt".
     '''
 
     hashalg = 1                 # SHA-1
@@ -978,15 +974,18 @@ class NSEC3(NSECBASE):
     iterations = 1
     saltlen = 5
     salt = 's' * saltlen
-    hashlen = 20
-    hash = 'h' * hashlen
-    def dump_fixedpart(self, f, bitmap_totallen):
+
+    def dump(self, f):
         if self.rdlen is None:
-            # if rdlen needs to be calculated, it must be based on the bitmap
-            # length, because the configured maplen can be fake.
-            self.rdlen = 4 + 1 + len(self.salt) + 1 + len(self.hash) \
-                + bitmap_totallen
+            self.rdlen = 4 + 1 + len(self.salt)
         self.dump_header(f, self.rdlen)
+        self._dump_params(f)
+
+    def _dump_params(self, f):
+        '''This method is intended to be shared with NSEC3 class.
+
+        '''
+
         optout_val = 1 if self.optout else 0
         f.write('# Hash Alg=%s, Opt-Out=%d, Other Flags=%0x, Iterations=%d\n' %
                 (code_totext(self.hashalg, rdict_nsec3_algorithm),
@@ -997,6 +996,29 @@ class NSEC3(NSECBASE):
         f.write('%02x%s%s\n' % (self.saltlen,
                                 ' ' if len(self.salt) > 0 else '',
                                 encode_string(self.salt)))
+
+class NSEC3(NSECBASE, NSEC3PARAM):
+    '''Implements rendering NSEC3 RDATA in the test data format.
+
+    Configurable parameters are as follows (see the description of the
+    same name of attribute for the default value):
+    - Type bitmap related parameters: see class NSECBASE
+    - Hash parameter related parameters: see class NSEC3PARAM
+    - hashlen (int): The Hash Length field.
+    - hash (string): The Next Hashed Owner Name field.  This parameter
+      is interpreted as "salt".
+    '''
+
+    hashlen = 20
+    hash = 'h' * hashlen
+    def dump_fixedpart(self, f, bitmap_totallen):
+        if self.rdlen is None:
+            # if rdlen needs to be calculated, it must be based on the bitmap
+            # length, because the configured maplen can be fake.
+            self.rdlen = 4 + 1 + len(self.salt) + 1 + len(self.hash) \
+                + bitmap_totallen
+        self.dump_header(f, self.rdlen)
+        self._dump_params(f)
         f.write("# Hash Len=%d, Hash='%s'\n" % (self.hashlen, self.hash))
         f.write('%02x%s%s\n' % (self.hashlen,
                                 ' ' if len(self.hash) > 0 else '',