Struct exonum::crypto::Hash

pub struct Hash(_);

SHA256 hash.

Default implementation for the Hash returns hash consisting of zeros.

Examples

use exonum::crypto::{self, Hash};

let data = [1, 2, 3];
let hash_from_data = crypto::hash(&data);
let default_hash = Hash::default();

Methods

impl Hash

fn zero() -> Self

Creates a new instance filled with zeros.

impl Hash

fn new(ba: [u8; 32]) -> Self

Creates a new instance from bytes array.

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

Creates a new instance from bytes slice.

Trait Implementations

impl<'a> ExonumJson for &'a Hash

fn deserialize_field<B: WriteBufferWrapper>(
    value: &Value,
    buffer: &mut B,
    from: Offset,
    to: Offset
) -> Result<(), Box<Error>>

write deserialized field in buffer on place.

fn serialize_field(&self) -> Result<Value, Box<Error>>

serialize field as json::Value

impl ExonumJsonDeserialize for Hash

fn deserialize(value: &Value) -> Result<Self, Box<Error>>

deserialize json value.

impl<'a> Field<'a> for &'a Hash

fn field_size() -> Offset

Field's header size

unsafe fn read(buffer: &'a [u8], from: Offset, _: Offset) -> &'a Hash

Read Field from buffer, with given position, beware of memory unsafety, you should check Field before read.

fn write(&self, buffer: &mut Vec<u8>, from: Offset, to: Offset)

Write Field to buffer, in given position write doesn't lead to memory unsafety.

fn check(
    _: &'a [u8],
    from: CheckedOffset,
    to: CheckedOffset,
    latest_segment: CheckedOffset
) -> Result

Checks if data in the buffer could be deserialized. Returns an index of latest data seen.

impl PartialEq for Hash

fn eq(&self, __arg_0: &Hash) -> bool

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

fn ne(&self, __arg_0: &Hash) -> bool

This method tests for !=.

impl Eq for Hash

impl Clone for Hash

fn clone(&self) -> Hash

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for Hash

impl PartialOrd for Hash

fn partial_cmp(&self, __arg_0: &Hash) -> Option<Ordering>

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

fn lt(&self, __arg_0: &Hash) -> bool

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

fn le(&self, __arg_0: &Hash) -> bool

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

fn gt(&self, __arg_0: &Hash) -> bool

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

fn ge(&self, __arg_0: &Hash) -> bool

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

impl Ord for Hash

fn cmp(&self, __arg_0: &Hash) -> Ordering

This method returns an Ordering between self and other.

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

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

Compares and returns the maximum of two values.

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

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

Compares and returns the minimum of two values.

impl Hash for Hash

fn hash<__H: Hasher>(&self, __arg_0: &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 AsRef<[u8]> for Hash

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

Performs the conversion.

impl Debug for Hash

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

Formats the value using the given formatter.

impl HexValue for Hash

fn to_hex(&self) -> String

Format value as hex representation.

fn from_hex<T: AsRef<str>>(v: T) -> Result<Self, FromHexError>

Convert value from hex representation.

impl Serialize for Hash

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

Serialize this value into the given Serde serializer.

impl<'de> Deserialize<'de> for Hash

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

Deserialize this value from the given Serde deserializer.

impl Index<Range<usize>> for Hash

type Output = [u8]

The returned type after indexing

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

The method for the indexing (container[index]) operation

impl Index<RangeTo<usize>> for Hash

type Output = [u8]

The returned type after indexing

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

The method for the indexing (container[index]) operation

impl Index<RangeFrom<usize>> for Hash

type Output = [u8]

The returned type after indexing

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

The method for the indexing (container[index]) operation

impl Index<RangeFull> for Hash

type Output = [u8]

The returned type after indexing

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

The method for the indexing (container[index]) operation

impl Default for Hash

fn default() -> Hash

Returns the "default value" for a type.

impl StorageKey for Hash

fn size(&self) -> usize

Returns the size of the serialized key in bytes.

fn write(&self, buffer: &mut [u8])

Serialize a key into the specified buffer of bytes.

fn read(buffer: &[u8]) -> Self

Deserialize a key from the specified buffer of bytes.

impl StorageValue for Hash

fn into_bytes(self) -> Vec<u8>

Serialize a value into a vector of bytes.

fn from_bytes(value: Cow<[u8]>) -> Self

Deserialize a value from bytes.

fn hash(&self) -> Hash

Returns a hash of the value.

impl ProofMapKey for Hash