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[trac117] added a test case with empty hash. code had a bug, so fixed it.

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This commit is contained in:
JINMEI Tatuya 2011-02-16 00:47:17 -08:00
parent 75cd27c3b2
commit 00b804d710
5 changed files with 21 additions and 3 deletions
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4
src/lib/dns/rdata/generic/nsec3_50.cc
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@ -163,8 +163,8 @@ NSEC3::NSEC3(InputBuffer& buffer, size_t rdata_len) {
const uint8_t nextlen = buffer.readUint8();
--rdata_len;
if (rdata_len <= nextlen) {
isc_throw(DNSMessageFORMERR, "NSEC3 hash length is too large: " <<
if (nextlen == 0 || rdata_len <= nextlen) {
isc_throw(DNSMessageFORMERR, "NSEC3 invalid hash length: " <<
static_cast<unsigned int>(nextlen));
}

5
src/lib/dns/tests/rdata_nsec3_unittest.cc
View File

@ -153,6 +153,11 @@ TEST_F(Rdata_NSEC3_Test, createFromWire) {
"rdata_nsec3_fromWire12.wire"),
DNSMessageFORMERR);
// empty hash. invalid.
EXPECT_THROW(rdataFactoryFromFile(RRType::NSEC3(), RRClass::IN(),
"rdata_nsec3_fromWire14.wire"),
DNSMessageFORMERR);
//
// Short buffer cases. The data is valid NSEC3 RDATA, but the buffer
// is trimmed at the end. All cases should result in an exception from

2
src/lib/dns/tests/testdata/Makefile.am vendored
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@ -14,6 +14,7 @@ BUILT_SOURCES += rdata_nsec3_fromWire6.wire rdata_nsec3_fromWire7.wire
BUILT_SOURCES += rdata_nsec3_fromWire8.wire rdata_nsec3_fromWire9.wire
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
BUILT_SOURCES += rdata_rrsig_fromWire2.wire
BUILT_SOURCES += rdata_soa_toWireUncompressed.wire
BUILT_SOURCES += rdata_txt_fromWire2.wire rdata_txt_fromWire3.wire
@ -62,6 +63,7 @@ EXTRA_DIST += rdata_nsec3_fromWire6.spec rdata_nsec3_fromWire7.spec
EXTRA_DIST += rdata_nsec3_fromWire8.spec rdata_nsec3_fromWire9.spec
EXTRA_DIST += rdata_nsec3_fromWire10.spec rdata_nsec3_fromWire11.spec
EXTRA_DIST += rdata_nsec3_fromWire12.spec rdata_nsec3_fromWire13.spec
EXTRA_DIST += rdata_nsec3_fromWire14.spec
EXTRA_DIST += rdata_opt_fromWire rdata_rrsig_fromWire1
EXTRA_DIST += rdata_rrsig_fromWire2.spec
EXTRA_DIST += rdata_soa_fromWire rdata_soa_toWireUncompressed.spec

4
src/lib/dns/tests/testdata/gen-wiredata.py.in vendored
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@ -361,7 +361,9 @@ class NSEC3(NSECBASE):
' ' if len(self.salt) > 0 else '',
encode_string(self.salt)))
f.write("# Hash Len=%d, Hash='%s'\n" % (self.hashlen, self.hash))
f.write('%02x %s\n' % (self.hashlen, encode_string(self.hash)))
f.write('%02x%s%s\n' % (self.hashlen,
' ' if len(self.hash) > 0 else '',
encode_string(self.hash)))
class RRSIG:
rdlen = -1 # auto-calculate

9
src/lib/dns/tests/testdata/rdata_nsec3_fromWire14.spec vendored Normal file
View File

@ -0,0 +1,9 @@
#
# An invalid NSEC3 RDATA: empty hash
#
[custom]
sections: nsec3
[nsec3]
hashlen: 0
hash: ''