2e045a980c
It's useful, when combined with patching crypto/rand/deterministic.c in, for debugging things. Also if we want to record fuzzer transcripts again, this probably should be on. Change-Id: I109cf27ebab64f01a13466f0d960def3257d8750 Reviewed-on: https://boringssl-review.googlesource.com/8192 Reviewed-by: David Benjamin <davidben@google.com>
38 lines
1.2 KiB
Go
38 lines
1.2 KiB
Go
// Copyright (c) 2016, Google Inc.
|
|
//
|
|
// Permission to use, copy, modify, and/or distribute this software for any
|
|
// purpose with or without fee is hereby granted, provided that the above
|
|
// copyright notice and this permission notice appear in all copies.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
|
|
// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
|
|
// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
|
|
// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
|
|
|
|
package runner
|
|
|
|
import (
|
|
"encoding/binary"
|
|
)
|
|
|
|
// Use a different key from crypto/rand/deterministic.c.
|
|
var deterministicRandKey = []byte("runner deterministic key 0123456")
|
|
|
|
type deterministicRand struct {
|
|
numCalls uint64
|
|
}
|
|
|
|
func (d *deterministicRand) Read(buf []byte) (int, error) {
|
|
for i := range buf {
|
|
buf[i] = 0
|
|
}
|
|
var nonce [12]byte
|
|
binary.LittleEndian.PutUint64(nonce[:8], d.numCalls)
|
|
chaCha20(buf, buf, deterministicRandKey, nonce[:], 0)
|
|
d.numCalls++
|
|
return len(buf), nil
|
|
}
|