Struct sequoia_openpgp::crypto::mpi::MPI

source ·
pub struct MPI { /* private fields */ }
Expand description

A Multiprecision Integer.

Implementations§

source§

impl MPI

source

pub fn new(value: &[u8]) -> Self

Creates a new MPI.

This function takes care of removing leading zeros.

source

pub fn new_point(x: &[u8], y: &[u8], field_bits: usize) -> Self

Creates new MPI encoding an uncompressed EC point.

Encodes the given point on a elliptic curve (see Section 6 of RFC 6637 for details). This is used to encode public keys and ciphertexts for the NIST curves (NistP256, NistP384, and NistP521).

source

pub fn new_compressed_point(x: &[u8]) -> Self

Creates new MPI encoding a compressed EC point using native encoding.

Encodes the given point on a elliptic curve (see Section 13.2 of RFC4880bis for details). This is used to encode public keys and ciphertexts for the Bernstein curves (currently X25519).

source

pub fn zero() -> Self

Creates a new MPI representing zero.

source

pub fn is_zero(&self) -> bool

Tests whether the MPI represents zero.

source

pub fn bits(&self) -> usize

Returns the length of the MPI in bits.

Leading zero-bits are not included in the returned size.

source

pub fn value(&self) -> &[u8]

Returns the value of this MPI.

Note that due to stripping of zero-bytes, the returned value may be shorter than expected.

source

pub fn value_padded(&self, to: usize) -> Result<Cow<'_, [u8]>>

Returns the value of this MPI zero-padded to the given length.

MPI-encoding strips leading zero-bytes. This function adds them back, if necessary. If the size exceeds to, an error is returned.

source

pub fn decode_point(&self, curve: &Curve) -> Result<(&[u8], &[u8])>

Decodes an EC point encoded as MPI.

Decodes the MPI into a point on an elliptic curve (see Section 6 of RFC 6637 and Section 13.2 of RFC4880bis for details). If the point is not compressed, the function returns (x, y). If it is compressed, y will be empty.

§Errors

Returns Error::UnsupportedEllipticCurve if the curve is not supported, Error::MalformedMPI if the point is formatted incorrectly, Error::InvalidOperation if the given curve is operating on native octet strings.

Trait Implementations§

source§

impl Clone for MPI

source§

fn clone(&self) -> MPI

Returns a copy of the value. Read more
1.0.0 · source§

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

Performs copy-assignment from source. Read more
source§

impl Debug for MPI

source§

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

Formats the value using the given formatter. Read more
source§

impl From<Box<[u8]>> for MPI

source§

fn from(v: Box<[u8]>) -> Self

Converts to this type from the input type.
source§

impl From<MPI> for ProtectedMPI

source§

fn from(m: MPI) -> Self

Converts to this type from the input type.
source§

impl From<Vec<u8>> for MPI

source§

fn from(v: Vec<u8>) -> Self

Converts to this type from the input type.
source§

impl Hash for MPI

source§

fn hash(&self, hash: &mut dyn Digest)

Updates the given hash with this object.
source§

impl Hash for MPI

source§

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

Feeds this value into the given Hasher. Read more
1.3.0 · source§

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

Feeds a slice of this type into the given Hasher. Read more
source§

impl Marshal for MPI

source§

fn serialize(&self, w: &mut dyn Write) -> Result<()>

Writes a serialized version of the object to o.
source§

fn export(&self, o: &mut dyn Write) -> Result<()>

Exports a serialized version of the object to o. Read more
source§

impl MarshalInto for MPI

source§

fn serialized_len(&self) -> usize

Computes the maximal length of the serialized representation. Read more
source§

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

Serializes into the given buffer. Read more
source§

fn to_vec(&self) -> Result<Vec<u8>>

Serializes the packet to a vector.
source§

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

Exports into the given buffer. Read more
source§

fn export_to_vec(&self) -> Result<Vec<u8>>

Exports to a vector. Read more
source§

impl Ord for MPI

source§

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

This method returns an Ordering between self and other. Read more
1.21.0 · source§

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

Compares and returns the maximum of two values. Read more
1.21.0 · source§

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

Compares and returns the minimum of two values. Read more
1.50.0 · source§

fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
source§

impl<'a> Parse<'a, MPI> for MPI

source§

fn from_buffered_reader<R>(reader: R) -> Result<Self>
where R: BufferedReader<Cookie> + 'a,

Reads from the given buffered reader.
source§

fn from_reader<R: 'a + Read + Send + Sync>(reader: R) -> Result<Self>

Reads from the given reader.
source§

fn from_bytes<D: AsRef<[u8]> + ?Sized + Send + Sync>( data: &'a D, ) -> Result<Self>

Reads from the given slice. Read more
source§

fn from_file<P: AsRef<Path>>(path: P) -> Result<T>

Reads from the given file. Read more
source§

impl PartialEq for MPI

source§

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

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

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
source§

impl PartialOrd for MPI

source§

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

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · source§

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

This method tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · source§

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

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
1.0.0 · source§

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

This method tests greater than (for self and other) and is used by the > operator. Read more
1.0.0 · source§

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

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

impl Eq for MPI

Auto Trait Implementations§

§

impl Freeze for MPI

§

impl RefUnwindSafe for MPI

§

impl Send for MPI

§

impl Sync for MPI

§

impl Unpin for MPI

§

impl UnwindSafe for MPI

Blanket Implementations§

source§

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

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

impl<T> Borrow<T> for T
where T: ?Sized,

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

source§

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

Mutably borrows from an owned value. Read more
source§

impl<T> CloneToUninit for T
where T: Clone,

source§

default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
source§

impl<T> DynClone for T
where T: Clone,

source§

fn __clone_box(&self, _: Private) -> *mut ()

source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

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

source§

fn into(self) -> U

Calls U::from(self).

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

source§

impl<T> Same for T

§

type Output = T

Should always be Self
source§

impl<T> ToOwned for T
where T: Clone,

§

type Owned = T

The resulting type after obtaining ownership.
source§

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
source§

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

§

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

The type returned in the event of a conversion error.
source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
source§

impl<T> ErasedDestructor for T
where T: 'static,

source§

impl<T> MaybeSendSync for T