diff options
Diffstat (limited to 'internal/cryptocore/hkdf.go')
| -rw-r--r-- | internal/cryptocore/hkdf.go | 15 |
1 files changed, 6 insertions, 9 deletions
diff --git a/internal/cryptocore/hkdf.go b/internal/cryptocore/hkdf.go index b56f507..369616a 100644 --- a/internal/cryptocore/hkdf.go +++ b/internal/cryptocore/hkdf.go @@ -1,10 +1,9 @@ package cryptocore import ( + "crypto/hkdf" "crypto/sha256" "log" - - "golang.org/x/crypto/hkdf" ) const ( @@ -19,12 +18,10 @@ const ( // hkdfDerive derives "outLen" bytes from "masterkey" and "info" using // HKDF-SHA256 (RFC 5869). // It returns the derived bytes or panics. -func hkdfDerive(masterkey []byte, info string, outLen int) (out []byte) { - h := hkdf.New(sha256.New, masterkey, nil, []byte(info)) - out = make([]byte, outLen) - n, err := h.Read(out) - if n != outLen || err != nil { - log.Panicf("hkdfDerive: hkdf read failed, got %d bytes, error: %v", n, err) +func hkdfDerive(masterkey []byte, info string, outLen int) []byte { + key, err := hkdf.Key(sha256.New, masterkey, nil, info, outLen) + if err != nil { + log.Panicf("hkdfDerive: hkdf failed with error: %v", err) } - return out + return key } |