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Diffstat (limited to '')
| -rw-r--r-- | src/noise_helpers.go | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/src/noise_helpers.go b/src/noise_helpers.go index 24302c0..1e2de5f 100644 --- a/src/noise_helpers.go +++ b/src/noise_helpers.go @@ -3,6 +3,7 @@ package main import ( "crypto/hmac" "crypto/rand" + "crypto/subtle" "golang.org/x/crypto/blake2s" "golang.org/x/crypto/curve25519" "hash" @@ -58,11 +59,11 @@ func KDF3(t0, t1, t2 *[blake2s.Size]byte, key, input []byte) { } func isZero(val []byte) bool { - var acc byte + acc := 1 for _, b := range val { - acc |= b + acc &= subtle.ConstantTimeByteEq(b, 0) } - return acc == 0 + return acc == 1 } func setZero(arr []byte) { |