使用 DNSPython 验证 RRSIG 的脚本问题

如何解决使用 DNSPython 验证 RRSIG 的脚本问题

我正在编写一个脚本来使用 dnspython 验证 rrsigs，但我的代码有问题。以下是一个片段及其附带的错误消息：

domain = 'iana.org'
server = '8.8.8.8'

qname = dns.name.from_text(domain)

# get DNSKEYs
DNSKEY_query = dns.message.make_query(qname,dns.rdatatype.DNSKEY,want_dnssec=True)
(DNSKEY_response,_) = dns.query.udp_with_fallback(DNSKEY_query,server)
dnskey_set,dnskey_sig = DNSKEY_response.answer

# get RRset and RRsig to verify
query = dns.message.make_query(qname,dns.rdatatype.NS,want_dnssec=True)
(response,_) = dns.query.udp_with_fallback(query,server)
rrset,rrsig = response.answer
dns.dnssec.validate(rrset,rrsig,{dns.name.empty: dnskey_set},None)

错误信息。

Traceback (most recent call last):
  File "dnssec_validator.py",line 107,in <module>
    dns.dnssec.validate(rrset,None)
  File "/home/user/PycharmProjects/RPKIDNSSEC/venv/lib/python3.6/site-packages/dns/dnssec.py",line 494,in _validate
    raise ValidationFailure("no RRSIGs validated")
dns.dnssec.ValidationFailure: no RRSIGs validated