Struct Sha256Digest 

pub struct Sha256Digest(/* private fields */);

Raw SHA-256 identity, without a product-specific prefix or wire format.

Implementations

impl Sha256Digest

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

Construct an identity from exact digest bytes.

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

Borrow the digest bytes.

pub fn compute(bytes: &[u8]) -> Self

Hash bytes already held by the caller.

Examples found in repository

examples/inspect_regular_file.rs (line 28)

fn main() -> Result<(), Box<dyn std::error::Error>> {
    use ic_host_tools::artifact::{Sha256Digest, read_file_no_follow};
    use std::{io, path::Path};

    let mut args = std::env::args_os().skip(1);
    let path = args.next().ok_or_else(|| {
        io::Error::new(
            io::ErrorKind::InvalidInput,
            "usage: inspect_regular_file PATH MAX_BYTES",
        )
    })?;
    let max_bytes = args
        .next()
        .ok_or_else(|| io::Error::new(io::ErrorKind::InvalidInput, "missing byte limit"))?
        .into_string()
        .map_err(|_| io::Error::new(io::ErrorKind::InvalidInput, "byte limit must be UTF-8"))?
        .parse()?;
    if args.next().is_some() {
        return Err(io::Error::new(io::ErrorKind::InvalidInput, "unexpected argument").into());
    }
    let bytes = read_file_no_follow(Path::new(&path), max_bytes)?;
    println!(
        "raw_bytes={} sha256={}",
        bytes.len(),
        Sha256Digest::compute(&bytes)
    );
    Ok(())
}

Trait Implementations

impl Clone for Sha256Digest

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Sha256Digest

impl Debug for Sha256Digest

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

Formats the value using the given formatter.

impl Display for Sha256Digest

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

Formats the value using the given formatter.

impl Eq for Sha256Digest

impl FromStr for Sha256Digest

type Err = DigestParseError

The associated error which can be returned from parsing.

fn from_str(text: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for Sha256Digest

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, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Sha256Digest

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Sha256Digest