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handshake: validate HKDF-Expand-Label against crypto/tls implementation (#4311)

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* handshake: validate HKDF-Expand-Label against crypto/tls implementation

* handshake: add a benchmark for HKDF-Expand-Label
This commit is contained in:
Marten Seemann
2024-02-05 12:27:21 +07:00
committed by GitHub
parent dc49f5673b
commit c22a3c8e6f
3 changed files with 59 additions and 20 deletions
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2
internal/handshake/hkdf.go
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@@ -7,7 +7,7 @@ import (
"golang.org/x/crypto/hkdf"
)
// hkdfExpandLabel HKDF expands a label.
// hkdfExpandLabel HKDF expands a label as defined in RFC 8446, section 7.1.
// Since this implementation avoids using a cryptobyte.Builder, it is about 15% faster than the
// hkdfExpandLabel in the standard library.
func hkdfExpandLabel(hash crypto.Hash, secret, context []byte, label string, length int) []byte {