|author||Brad Fitzpatrick <email@example.com>||Thu Dec 15 05:53:01 2016 +0000|
|committer||Brad Fitzpatrick <firstname.lastname@example.org>||Wed Jan 25 17:21:33 2017 +0000|
[release-branch.go1.7] crypto/x509: speed up and deflake non-cgo Darwin root cert discovery Backporting Go 1.8's fix to #18203 Fixes #18688 --- Piping into security verify-cert only worked on macOS Sierra, and was flaky for unknown reasons. Users reported that the number of trusted root certs stopped randomly jumping around once they switched to using verify-cert against files on disk instead of /dev/stdin. But even using "security verify-cert" on 150-200 certs took too long. It took 3.5 seconds on my machine. More than 4 goroutines hitting verify-cert didn't help much, and soon started to hurt instead. New strategy, from comments in the code: // 1. Run "security trust-settings-export" and "security // trust-settings-export -d" to discover the set of certs with some // user-tweaked trusy policy. We're too lazy to parse the XML (at // least at this stage of Go 1.8) to understand what the trust // policy actually is. We just learn that there is _some_ policy. // // 2. Run "security find-certificate" to dump the list of system root // CAs in PEM format. // // 3. For each dumped cert, conditionally verify it with "security // verify-cert" if that cert was in the set discovered in Step 1. // Without the Step 1 optimization, running "security verify-cert" // 150-200 times takes 3.5 seconds. With the optimization, the // whole process takes about 180 milliseconds with 1 untrusted root // CA. (Compared to 110ms in the cgo path) Change-Id: I79737d9f2cb9b020ba297a326d4d31d68c7e9fee Reviewed-on: https://go-review.googlesource.com/35634 Reviewed-by: Joe Tsai <email@example.com>
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