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advancedtls: Add SNI logic to ServerOptions.GetCertificate #3697

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merged 30 commits into from Jul 28, 2020
Merged

advancedtls: Add SNI logic to ServerOptions.GetCertificate #3697

merged 30 commits into from Jul 28, 2020

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cindyxue
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@cindyxue cindyxue commented Jun 18, 2020 •
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This PR does the following thing:

For go1.10 and above, config.GetCertificate is now able to perform SNI logic based on ServerOptions.GetCertificate and return the certificate that matches the common name or DNS field in the given ClientHelloInfo.

For go1.9, config.GetCertificate will always return the first certificate in the certificate list given by ServerOptions.GetCertificate because SupportsCertificate is not supported.

@ZhenLian

@ZhenLian ZhenLian self-requested a review June 18, 2020 18:06
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ZhenLian suggested changes Jun 18, 2020
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Thanks for the draft! I left some comments at the first glance. Let me know if you have any questions.

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@ZhenLian Thanks for the review! I made some changes. Could you please check it again?

@cindyxue cindyxue requested a review from ZhenLian June 18, 2020 19:07
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This PR is still a draft, is it right?

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@menghanl Yes :)

ZhenLian
ZhenLian suggested changes Jun 18, 2020
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@cindyxue cindyxue requested a review from ZhenLian June 18, 2020 22:26
@cindyxue cindyxue changed the title advancedtls: Add SNI logic to config.GetCertificate advancedtls: Add SNI logic to ServerOptions.GetCertificate Jun 30, 2020
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cindyxue commented Jun 30, 2020 •
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@ZhenLian I added a unit test to test the newly added GetCertificate with SNI logic. However, one of the Travis-CI test fails and the error message shows security/advancedtls/advancedtls.go:526:24: clientHello.SupportsCertificate undefined (type *tls.ClientHelloInfo has no field or method SupportsCertificate). According to the golang tls package, this function func (chi *ClientHelloInfo) SupportsCertificate(c *Certificate) error does exist. Would you happen to know what was wrong here?

@cindyxue cindyxue marked this pull request as ready for review June 30, 2020 17:14
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@cindyxue It looks like Go 1.9 doesn't support this function .... To bypass this check, you may want to use the build Constraints to have different implementations on different Go versions. See #3626 for example.

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ZhenLian approved these changes Jul 22, 2020
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@easwars Hi Easwar, Can you please take a look at this PR please? Thanks in advance!

@ZhenLian ZhenLian requested a review from easwars July 22, 2020 07:00
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@cindyxue cindyxue requested a review from easwars July 24, 2020 19:19
@easwars easwars added this to the 1.31 Release milestone Jul 24, 2020
@cindyxue cindyxue force-pushed the Cindy/SNI branch 2 times, most recently from daf1375 to 8fd0b50 Compare July 25, 2020 03:31
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cindyxue commented Jul 25, 2020 •
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@easwars Thank you so much for the code review, Easwar! I have made changes addressing the review comments. Could you please take another look and see if there are more places to change? Thanks again!

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Looks good to me. Some minor nits to take care of before merging.

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@easwars Thank you so much for the code review! Fix all of the minor issues mentioned above.

@ZhenLian Could you please take one last look at the PR and see if it's ready to be merged? Thank you so much!

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Thanks @cindyxue for the implementation and Thanks @easwars for the review! Merging now ...

@ZhenLian ZhenLian merged commit dfc0c05 into grpc:master Jul 28, 2020
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@easwars easwars easwars approved these changes

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@cindyxue @menghanl @ZhenLian @easwars