Import std.crypto.random

ConstantTimeEquals

std.crypto.random

function

Public Function ConstantTimeEquals(a: UInt8[], b: UInt8[]): Bool

Whether a and b have the same bytes, in a time that depends only on their counts, not on where they first differ, so comparing a secret, like a MAC, tells nothing about it.

Examples

Local secret = SecureRandom.Bytes(32)
Expect(ConstantTimeEquals(secret, secret.Clone()))
Expect(!ConstantTimeEquals(secret, SecureRandom.Bytes(32)))

std/crypto/random.fb, line 68

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