Struct ScryptParams 

pub struct ScryptParams {
    pub log_n: u8,
    pub r: u32,
    pub p: u32,
}

Parameters for scrypt key derivation.

RFC 7914 recommends log_n=14 (N=16384), r=8, p=1 for interactive logins and higher values for sensitive use-cases.

Note: log_n encodes N as log₂(N), e.g. log_n=14 means N=16384.

Fields

log_n: u8

CPU/memory cost factor as log₂(N). N must be a power of 2.

r: u32

Block size. RFC 7914 recommends r=8.

p: u32

Parallelization factor. RFC 7914 recommends p=1.

Implementations

impl ScryptParams

pub fn new(log_n: u8, r: u32, p: u32) -> Result<Self, CryptoError>

Create new parameters, returning an error if they are invalid.

pub fn interactive() -> Self

Interactive login preset.

N=32768 (log_n=15), r=8, p=1 Provides ≈32 MiB memory and ~100–200 ms on a modern CPU.

pub fn moderate() -> Self

Moderate preset — balanced security and speed.

N=131072 (log_n=17), r=8, p=1 Provides ≈128 MiB memory and ~1 s on a modern CPU.

pub fn sensitive() -> Self

Sensitive (high-security) preset.

N=1048576 (log_n=20), r=8, p=1 Provides ≈1 GiB memory and ~5–30 s on a modern CPU.

Trait Implementations

impl Clone for ScryptParams

fn clone(&self) -> ScryptParams

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ScryptParams

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PasswordHashParams for ScryptParams

fn memory_cost(&self) -> Option<u32>

Memory cost approximation: 128 × N × r bytes expressed in KiB.

fn time_cost(&self) -> Option<u32>

Time cost (iterations for PBKDF2/Argon2) or None if not applicable.

fn parallelism(&self) -> Option<u32>

Degree of parallelism (Argon2/scrypt) or None if not applicable.

impl Copy for ScryptParams