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Diffstat (limited to 'packages/taler-util/src/prng-node.ts')
-rw-r--r-- | packages/taler-util/src/prng-node.ts | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/packages/taler-util/src/prng-node.ts b/packages/taler-util/src/prng-node.ts new file mode 100644 index 000000000..226923b8b --- /dev/null +++ b/packages/taler-util/src/prng-node.ts @@ -0,0 +1,30 @@ +/* + This file is part of GNU Taler + (C) 2021 Taler Systems S.A. + + GNU Taler is free software; you can redistribute it and/or modify it under the + terms of the GNU General Public License as published by the Free Software + Foundation; either version 3, or (at your option) any later version. + + GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY + WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR + A PARTICULAR PURPOSE. See the GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along with + GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/> + */ + +import { setPRNG } from "./nacl-fast.js"; +import cr from "crypto"; + +export function initNodePrng() { + // Initialize PRNG if environment provides CSPRNG. + // If not, methods calling randombytes will throw. + if (cr && cr.randomBytes) { + setPRNG(function (x: Uint8Array, n: number) { + const v = cr.randomBytes(n); + for (let i = 0; i < n; i++) x[i] = v[i]; + for (let i = 0; i < v.length; i++) v[i] = 0; + }); + } +} |