Struct PrecomputedKey 

pub struct PrecomputedKey(/* private fields */);

A precomputed shared key for public-key cryptography

This key is the result of the Diffie-Hellman key exchange between a public key and a secret key. It can be reused for multiple encryption/decryption operations with the same pair of keys, improving performance.

Properties

• Size: 32 bytes (256 bits)
• Derived from a public key and a secret key
• Must be kept confidential
• Can be used for multiple encryption/decryption operations

Implementations

impl PrecomputedKey

pub fn from_bytes(bytes: &[u8]) -> Result<Self>

Generate a new precomputed key from bytes

Arguments

• bytes - Byte slice of exactly BEFORENMBYTES length

Returns

• Result<Self> - A new precomputed key or an error if the input is invalid

pub fn as_bytes(&self) -> &[u8; 32]

Get a reference to the underlying bytes

Returns

• &[u8; BEFORENMBYTES] - Reference to the precomputed key bytes

pub const fn from_bytes_exact(bytes: [u8; 32]) -> Self

Create a precomputed key from a fixed-size bytes

Arguments

• bytes - Byte array of exactly BEFORENMBYTES length

Returns

• Self - A new precomputed key

Trait Implementations

impl AsRef<[u8]> for PrecomputedKey

fn as_ref(&self) -> &[u8]

Converts this type into a shared reference of the (usually inferred) input type.

impl Clone for PrecomputedKey

fn clone(&self) -> PrecomputedKey

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PrecomputedKey

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

Formats the value using the given formatter.

impl Drop for PrecomputedKey

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.

impl Eq for PrecomputedKey

impl From<PrecomputedKey> for [u8; 32]

fn from(key: PrecomputedKey) -> [u8; 32]

Converts to this type from the input type.

impl From<[u8; 32]> for PrecomputedKey

fn from(bytes: [u8; 32]) -> Self

Converts to this type from the input type.

impl PartialEq for PrecomputedKey

fn eq(&self, other: &PrecomputedKey) -> 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 StructuralPartialEq for PrecomputedKey

impl TryFrom<&[u8]> for PrecomputedKey

type Error = SodiumError

The type returned in the event of a conversion error.

fn try_from(slice: &[u8]) -> Result<Self, Self::Error>

Performs the conversion.

impl Zeroize for PrecomputedKey

fn zeroize(&mut self)

Zero out this object from memory using Rust intrinsics which ensure the zeroization operation is not “optimized away” by the compiler.