Struct Argon2Params 

pub struct Argon2Params { /* private fields */ }

Argon2 password hash parameters.

These are parameters which can be encoded into a PHC hash string.

Implementations

impl Params

pub const DEFAULT_M_COST: u32

Default memory cost.

pub const MIN_M_COST: u32

Minimum number of 1 KiB memory blocks.

pub const MAX_M_COST: u32 = u32::MAX

Maximum number of 1 KiB memory blocks.

pub const DEFAULT_T_COST: u32 = 2

Default number of iterations (i.e. “time”).

pub const MIN_T_COST: u32 = 1

Minimum number of passes.

pub const MAX_T_COST: u32 = u32::MAX

Maximum number of passes.

pub const DEFAULT_P_COST: u32 = 1

Default degree of parallelism.

pub const MIN_P_COST: u32 = 1

Minimum and maximum number of threads (i.e. parallelism).

pub const MAX_P_COST: u32 = 0xFFFFFF

Minimum and maximum number of threads (i.e. parallelism).

pub const MAX_KEYID_LEN: usize = 8

Maximum length of a key ID in bytes.

pub const MAX_DATA_LEN: usize = 32

Maximum length of associated data in bytes.

pub const DEFAULT_OUTPUT_LEN: usize = 32

Default output length.

pub const MIN_OUTPUT_LEN: usize = 4

Minimum digest size in bytes.

pub const MAX_OUTPUT_LEN: usize = 0xFFFFFFFF

Maximum digest size in bytes.

pub const DEFAULT: Params

Default parameters (recommended).

pub const fn new( m_cost: u32, t_cost: u32, p_cost: u32, output_len: Option<usize>, ) -> Result<Params, Error>

Create new parameters.

Arguments

• m_cost: memory size in 1 KiB blocks. Between 8*p_cost and (2^32)-1.
• t_cost: number of iterations. Between 1 and (2^32)-1.
• p_cost: degree of parallelism. Between 1 and (2^24)-1.
• output_len: size of the KDF output in bytes. Default 32.

pub const fn m_cost(&self) -> u32

Memory size, expressed in kibibytes. Between 8*p_cost and (2^32)-1.

Value is an integer in decimal (1 to 10 digits).

pub const fn t_cost(&self) -> u32

Number of iterations. Between 1 and (2^32)-1.

Value is an integer in decimal (1 to 10 digits).

pub const fn p_cost(&self) -> u32

Degree of parallelism. Between 1 and (2^24)-1.

Value is an integer in decimal (1 to 3 digits).

pub fn keyid(&self) -> &[u8]

Key identifier: byte slice between 0 and 8 bytes in length.

Defaults to an empty byte slice.

Note this field is only present as a helper for reading/storing in the PHC hash string format (i.e. it is totally ignored from a cryptographical standpoint).

On top of that, this field is not longer part of the Argon2 standard (see: https://github.com/P-H-C/phc-winner-argon2/pull/173), and should not be used for any non-legacy work.

pub fn data(&self) -> &[u8]

Associated data: byte slice between 0 and 32 bytes in length.

Defaults to an empty byte slice.

This field is not longer part of the argon2 standard (see: https://github.com/P-H-C/phc-winner-argon2/pull/173), and should not be used for any non-legacy work.

pub const fn output_len(&self) -> Option<usize>

Length of the output (in bytes).

pub const fn block_count(&self) -> usize

Get the number of blocks required given the configured m_cost and p_cost.

Trait Implementations

impl Clone for Params

fn clone(&self) -> Params

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Params

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

Formats the value using the given formatter.

impl Default for Params

fn default() -> Params

Returns the “default value” for a type.

impl PartialEq for Params

fn eq(&self, other: &Params) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'a> TryFrom<&'a PasswordHash<'a>> for Params

Available on crate feature password-hash only.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(hash: &'a PasswordHash<'a>) -> Result<Params, Error>

Performs the conversion.

impl TryFrom<ParamsBuilder> for Params

type Error = Error

The type returned in the event of a conversion error.

fn try_from(builder: ParamsBuilder) -> Result<Params, Error>

Performs the conversion.

impl Eq for Params

impl StructuralPartialEq for Params