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crypto/tls: rotate session ticket keys

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Automatically rotate session ticket keys for servers
that don't already have sessionTicketKeys and that
haven't called SetSessionTicketKeys.

Now, session ticket keys will be rotated every 24 hours
with a lifetime of 7 days. This adds a small performance
cost to existing clients that don't provide a session
ticket encrypted with a fresh enough session ticket key,
which would require a full handshake.

Updates #25256

Change-Id: I15b46af7a82aab9a108bceb706bbf66243a1510f
Reviewed-on: https://go-review.googlesource.com/c/go/+/230679
Run-TryBot: Katie Hockman <katie@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
This commit is contained in:
Katie Hockman 2020-04-28 17:47:27 -04:00
parent 451074ba19
commit 47355c49eb
6 changed files with 180 additions and 99 deletions
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14
handshake_server_test.go
View file

@ -1496,12 +1496,8 @@ var getConfigForClientTests = []struct {
},
"",
func(config *Config) error {
// The value of SessionTicketKey should have been
// duplicated into the per-connection Config.
for i := range config.SessionTicketKey {
if b := config.SessionTicketKey[i]; b != byte(i) {
return fmt.Errorf("SessionTicketKey was not duplicated from original Config: byte %d has value %d", i, b)
}
if config.SessionTicketKey == [32]byte{} {
return fmt.Errorf("expected SessionTicketKey to be set")
}
return nil
},
@ -1522,10 +1518,8 @@ var getConfigForClientTests = []struct {
},
"",
func(config *Config) error {
// The session ticket keys should have been duplicated
// into the per-connection Config.
if l := len(config.sessionTicketKeys); l != 1 {
return fmt.Errorf("got len(sessionTicketKeys) == %d, wanted 1", l)
if config.SessionTicketKey == [32]byte{} {
return fmt.Errorf("expected SessionTicketKey to be set")
}
return nil
},