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crypto/tls: expose extensions presented by client to GetCertificate

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This enables JA3 and JA4 TLS fingerprinting to be implemented from
the GetCertificate callback, similar to what BoringSSL provides with
its SSL_CTX_set_dos_protection_cb hook.

fixes #32936

Change-Id: Idb54ebcb43075582fcef0ac6438727f494543424
Reviewed-on: https://go-review.googlesource.com/c/go/+/471396
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Roland Shoemaker <roland@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
This commit is contained in:
Bobby Powers 2023-02-25 16:24:54 -08:00 • committed by Roland Shoemaker
parent 681bfddd9d
commit 0d9e15f699
5 changed files with 80 additions and 0 deletions
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1
handshake_server.go
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@ -963,6 +963,7 @@ func clientHelloInfo(ctx context.Context, c *Conn, clientHello *clientHelloMsg)
SignatureSchemes: clientHello.supportedSignatureAlgorithms,
SupportedProtos: clientHello.alpnProtocols,
SupportedVersions: supportedVersions,
Extensions: clientHello.extensions,
Conn: c.conn,
config: c.config,
ctx: ctx,