crypto.scrypt #
Copyright (c) 2023 Kim Shrier. All rights reserved. Use of this source code is governed by an MIT license that can be found in the LICENSE file.
Package scrypt implements the key derivation functions as described in https://datatracker.ietf.org/doc/html/rfc7914
Constants #
const max_buffer_length = ((u64(1) << 32) - 1) * 32
const max_blocksize_parallal_product = u64(1 << 30)
fn scrypt #
fn scrypt(password []u8, salt []u8, n u64, r u32, p u32, dk_len u64) ![]u8
scrypt performs password based key derivation using the scrypt algorithm.
The input parameters are:
password - a slice of bytes which is the password being used to derive the key. Don't leak this value to anybody. salt - a slice of bytes used to make it harder to crack the key. n - CPU/Memory cost parameter, must be larger than 0, a power of 2, and less than 2^(128 * r / 8). r - block size parameter. p - parallelization parameter, a positive integer less than or equal to ((2^32-1) * hLen) / MFLen where hLen is 32 and MFlen is 128 * r. dk_len - intended output length in octets of the derived key; a positive integer less than or equal to (2^32 - 1) * hLen where hLen is 32.
Reasonable values for n, r, and p are n = 1024, r = 8, p = 16.