1
在测试TLS安全性时,我经常使用grep
获得openssl结果。例如:在grep期间抑制Openssl输出
$ openssl s_client -tls1_2 -connect 172.11.15.32:443 </dev/null | grep 'IS s'
depth=0 C = US, ST = asd, O = Billing, CN = asdasd, emailAddress = [email protected]
verify error:num=18:self signed certificate
verify return:1
depth=0 C = US, ST = asd, O = Billing, CN = asdasd, emailAddress = [email protected]
verify return:1
DONE
Secure Renegotiation IS supported
然而,问题是,不管我用grep的,输出始终包含在开始的时候,这些(或类似)行:
depth=0 C = US, ST = asd, O = Billing, CN = asdasd, emailAddress = [email protected]
verify error:num=18:self signed certificate
verify return:1
depth=0 C = US, ST = asd, O = Billing, CN = asdasd, emailAddress = [email protected]
verify return:1
是否有可能以某种方式抑制这些消息并只接收grep结果,如人们所期望的那样?
这可能是因为它的大部分输出到stderr,它经过不'grep'使得它的任何动作(它只是检查标准输出)。只需使用'openssl 2>/dev/null'重定向它,然后相应地grep。 – fedorqui
@fedorqui这很快,并且确实解决了问题,谢谢! – ChildinTime