Struct sodiumoxide::crypto::auth::hmacsha256::Tag

#[must_use]
pub struct Tag(pub [u8; 32]);

Authentication Tag

The tag implements the traits PartialEq and Eq using constant-time comparison functions. See sodiumoxide::utils::memcmp

Methods

impl Tag

pub fn from_slice(bs: &[u8]) -> Option<Tag>

from_slice() creates an object from a byte slice

This function will fail and return None if the length of the byte-slice isn't equal to the length of the object

Trait Implementations

impl Copy for Tag

impl Clone for Tag

fn clone(&self) -> Tag

Returns a copy of the value.

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

Performs copy-assignment from source.

impl PartialEq for Tag

fn eq(&self, Tag: &Tag) -> bool

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl Eq for Tag

impl Serialize for Tag

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where
    S: Serializer, 

Serialize this value into the given Serde serializer.

impl<'de> Deserialize<'de> for Tag

fn deserialize<D>(deserializer: D) -> Result<Tag, D::Error> where
    D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.

impl Index<Range<usize>> for Tag

Allows a user to access the byte contents of an object as a slice.

WARNING: it might be tempting to do comparisons on objects by using x[a..b] == y[a..b]. This will open up for timing attacks when comparing for example authenticator tags. Because of this only use the comparison functions exposed by the sodiumoxide API.

type Output = [u8]

The returned type after indexing.

fn index(&self, _index: Range<usize>) -> &[u8]

Performs the indexing (container[index]) operation.

impl Index<RangeTo<usize>> for Tag

Allows a user to access the byte contents of an object as a slice.

WARNING: it might be tempting to do comparisons on objects by using x[..b] == y[..b]. This will open up for timing attacks when comparing for example authenticator tags. Because of this only use the comparison functions exposed by the sodiumoxide API.

type Output = [u8]

The returned type after indexing.

fn index(&self, _index: RangeTo<usize>) -> &[u8]

Performs the indexing (container[index]) operation.

impl Index<RangeFrom<usize>> for Tag

Allows a user to access the byte contents of an object as a slice.

WARNING: it might be tempting to do comparisons on objects by using x[a..] == y[a..]. This will open up for timing attacks when comparing for example authenticator tags. Because of this only use the comparison functions exposed by the sodiumoxide API.

type Output = [u8]

The returned type after indexing.

fn index(&self, _index: RangeFrom<usize>) -> &[u8]

Performs the indexing (container[index]) operation.

impl Index<RangeFull> for Tag

Allows a user to access the byte contents of an object as a slice.

WARNING: it might be tempting to do comparisons on objects by using x[] == y[]. This will open up for timing attacks when comparing for example authenticator tags. Because of this only use the comparison functions exposed by the sodiumoxide API.

type Output = [u8]

The returned type after indexing.

fn index(&self, _index: RangeFull) -> &[u8]

Performs the indexing (container[index]) operation.

impl AsRef<[u8]> for Tag

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

Performs the conversion.

impl PartialOrd for Tag

fn partial_cmp(&self, other: &Tag) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Tag) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Tag) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn ge(&self, other: &Tag) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

fn gt(&self, other: &Tag) -> bool

This method tests greater than (for self and other) and is used by the > operator.

impl Ord for Tag

fn cmp(&self, other: &Tag) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

impl Hash for Tag

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given [Hasher].

impl Debug for Tag

fn fmt(&self, formatter: &mut Formatter) -> Result

Formats the value using the given formatter.