Struct openssl::hash::Hasher

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pub struct Hasher { /* private fields */ }
Expand description

Provides message digest (hash) computation.

Examples

use openssl::hash::{Hasher, MessageDigest};

let data = [b"\x42\xF4", b"\x97\xE0"];
let spec = b"\x7c\x43\x0f\x17\x8a\xef\xdf\x14\x87\xfe\xe7\x14\x4e\x96\x41\xe2";
let mut h = Hasher::new(MessageDigest::md5())?;
h.update(data[0])?;
h.update(data[1])?;
let res = h.finish()?;
assert_eq!(&*res, spec);

Warning

Don’t actually use MD5 and SHA-1 hashes, they’re not secure anymore.

Don’t ever hash passwords, use the functions in the pkcs5 module or bcrypt/scrypt instead.

For extendable output functions (XOFs, i.e. SHAKE128/SHAKE256), you must use Hasher::finish_xof instead of Hasher::finish and provide a buf to store the hash. The hash will be as long as the buf.

Implementations§

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impl Hasher

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pub fn new(ty: MessageDigest) -> Result<Hasher, ErrorStack>

Creates a new Hasher with the specified hash type.

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pub fn update(&mut self, data: &[u8]) -> Result<(), ErrorStack>

Feeds data into the hasher.

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pub fn finish(&mut self) -> Result<DigestBytes, ErrorStack>

Returns the hash of the data written and resets the non-XOF hasher.

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pub fn finish_xof(&mut self, buf: &mut [u8]) -> Result<(), ErrorStack>

Writes the hash of the data into the supplied buf and resets the XOF hasher. The hash will be as long as the buf.

Trait Implementations§

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impl Clone for Hasher

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fn clone(&self) -> Hasher

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Drop for Hasher

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fn drop(&mut self)

Executes the destructor for this type. Read more
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impl Write for Hasher

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fn write(&mut self, buf: &[u8]) -> Result<usize>

Write a buffer into this writer, returning how many bytes were written. Read more
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fn flush(&mut self) -> Result<()>

Flush this output stream, ensuring that all intermediately buffered contents reach their destination. Read more
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fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize, Error>

Like write, except that it writes from a slice of buffers. Read more
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fn is_write_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)
Determines if this Writer has an efficient write_vectored implementation. Read more
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fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this writer. Read more
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fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

🔬This is a nightly-only experimental API. (write_all_vectored)
Attempts to write multiple buffers into this writer. Read more
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fn write_fmt(&mut self, fmt: Arguments<'_>) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered. Read more
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fn by_ref(&mut self) -> &mut Selfwhere Self: Sized,

Creates a “by reference” adapter for this instance of Write. Read more
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impl Send for Hasher

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impl Sync for Hasher

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.