Struct Argon2_Context 

#[repr(C)]
pub struct Argon2_Context {

    pub out: *mut u8,
    pub outlen: u32,
    pub pwd: *mut u8,
    pub pwdlen: u32,
    pub salt: *mut u8,
    pub saltlen: u32,
    pub secret: *mut u8,
    pub secretlen: u32,
    pub ad: *mut u8,
    pub adlen: u32,
    pub t_cost: u32,
    pub m_cost: u32,
    pub lanes: u32,
    pub threads: u32,
    pub version: u32,
    pub allocate_cbk: allocate_fptr,
    pub free_cbk: deallocate_fptr,
    pub flags: u32,
}

---

Context: structure to hold Argon2 inputs:

• output array and its length,
• password and its length,
• salt and its length,
• secret and its length,
• associated data and its length,
• number of passes, amount of used memory (in KBytes, can be rounded up a bit)
• number of parallel threads that will be run.

All the parameters above affect the output hash value. Additionally, two function pointers can be provided to allocate and deallocate the memory (if NULL, memory will be allocated internally). Also, three flags indicate whether to erase password, secret as soon as they are pre-hashed (and thus not needed anymore), and the entire memory.

---

Simplest situation: you have output array out[8], password is stored in pwd[32], salt is stored in salt[16], you do not have keys nor associated data. You need to spend 1 GB of RAM and you run 5 passes of Argon2d with 4 parallel lanes. You want to erase the password, but you’re OK with last pass not being erased. You want to use the default memory allocator. Then you initialize: Argon2_Context(out,8,pwd,32,salt,16,NULL,0,NULL,0,5,1<<20,4,4,NULL,NULL,true,false,false,false)

Fields

out: *mut u8

outlen: u32

pwd: *mut u8

pwdlen: u32

salt: *mut u8

saltlen: u32

secret: *mut u8

secretlen: u32

ad: *mut u8

adlen: u32

t_cost: u32

m_cost: u32

lanes: u32

threads: u32

version: u32

allocate_cbk: allocate_fptr

free_cbk: deallocate_fptr

flags: u32

Trait Implementations

impl Clone for Argon2_Context

fn clone(&self) -> Argon2_Context

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Argon2_Context

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

Formats the value using the given formatter.

impl Copy for Argon2_Context