Add get_txt_record(), fix variable declaration in get_mx_record() #1646
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This commit adds a function for querying the TXT DNS record, so that subsequently we'll can build on top of that a function for checking MTA-STS, see #1073. Also it modifies a local variable mxs in get_mx_record() which was declared as mx but mxs was used. (That is pending an backport to 3.0.)
drwetter
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Jan 5, 2021
This commit adds a first PoC implementation of MTA-STS (RFC 8461), see also issue #1646. What works: - test a hostname which is equal to a MX record and a domainname and has a MTS-STS setup (dev.testssl.sh) - check _mta-sts TXT record + https://mta-sts.$NODE/.well-known/mta-sts.txt - check also _smtp._tls TXT record - screen output What doesn't work - test a hostname which is not equal to domainname - test a hostname which has not mx record - fileout put - any parsing of TXT record + .well-known/mta-sts.txt - when no TXT records or .well-known/mta-sts.txt are there - fileoutput - colored screen output There's a stub function for DANE. There are also two stub functions splitting HTTP body from HTTP header which I couldn't get to work and will be removed later. Besides to avoid confusion it changes from all GET requests over HTTPS tm_out to safe_echo. It's actually exactly the same only the name is different.
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drwetter
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Jan 12, 2021
This commit adds a first PoC implementation of MTA-STS (RFC 8461), see also issue #1646. What works: - test a hostname which is equal to a MX record and a domainname and has a MTS-STS setup (dev.testssl.sh) - check _mta-sts TXT record + https://mta-sts.$NODE/.well-known/mta-sts.txt - check also _smtp._tls TXT record - screen output What doesn't work - test a hostname which is not equal to domainname - test a hostname which has not mx record - fileout put - any parsing of TXT record + .well-known/mta-sts.txt - when no TXT records or .well-known/mta-sts.txt are there - fileoutput - colored screen output There's a stub function for DANE. There are also two stub functions splitting HTTP body from HTTP header which I couldn't get to work and will be removed later. Besides to avoid confusion it changes from all GET requests over HTTPS tm_out to safe_echo. It's actually exactly the same only the name is different.
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This commit adds a function for querying the TXT DNS record, so that subsequently we'll can build on top of that a function for checking MTA-STS, see #1073.
Also it modifies a local variable mxs in get_mx_record() which was declared as mx but mxs was used. (That is pending an backport to 3.0.)