From b05d56031c7ff6bceca4ed8788d49fe8b04a7da6 Mon Sep 17 00:00:00 2001 From: Bob Halley Date: Tue, 28 Aug 2012 13:51:59 -0700 Subject: Do not generate empty NSEC3 bitmap windows --- dns/rdtypes/ANY/NSEC3.py | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'dns') diff --git a/dns/rdtypes/ANY/NSEC3.py b/dns/rdtypes/ANY/NSEC3.py index c7ac737..b42fe4c 100644 --- a/dns/rdtypes/ANY/NSEC3.py +++ b/dns/rdtypes/ANY/NSEC3.py @@ -114,7 +114,8 @@ class NSEC3(dns.rdata.Rdata): prior_rdtype = nrdtype new_window = nrdtype // 256 if new_window != window: - windows.append((window, ''.join(bitmap[0:octets]))) + if octets != 0: + windows.append((window, ''.join(bitmap[0:octets]))) bitmap = ['\0'] * 32 window = new_window offset = nrdtype % 256 @@ -122,7 +123,8 @@ class NSEC3(dns.rdata.Rdata): bit = offset % 8 octets = byte + 1 bitmap[byte] = chr(ord(bitmap[byte]) | (0x80 >> bit)) - windows.append((window, ''.join(bitmap[0:octets]))) + if octets != 0: + windows.append((window, ''.join(bitmap[0:octets]))) return cls(rdclass, rdtype, algorithm, flags, iterations, salt, next, windows) from_text = classmethod(from_text) -- cgit v1.2.1