[−][src]Enum sequoia_openpgp::types::Curve
Elliptic curves used in OpenPGP.
PublicKeyAlgorithm
does not differentiate between elliptic
curves. Instead, the curve is specified using an OID prepended to
the key material. We provide this type to be able to match on the
curves.
Variants
NIST curve P-256.
NIST curve P-384.
NIST curve P-521.
brainpoolP256r1.
brainpoolP512r1.
D.J. Bernstein's "Twisted" Edwards curve Ed25519.
Elliptic curve Diffie-Hellman using D.J. Bernstein's Curve25519.
Unknown curve.
Implementations
impl Curve
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pub fn bits(&self) -> Option<usize>
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Returns the length of public keys over this curve in bits.
For the Kobliz curves this is the size of the underlying finite field. For X25519 it is 256.
Note: This information is useless and should not be used to gauge the security of a particular curve. This function exists only because some legacy PGP application like HKP need it.
Returns None
for unknown curves.
Examples
use sequoia_openpgp as openpgp; use openpgp::types::Curve; assert_eq!(Curve::NistP256.bits(), Some(256)); assert_eq!(Curve::NistP384.bits(), Some(384)); assert_eq!(Curve::Ed25519.bits(), Some(256)); assert_eq!(Curve::Unknown(Box::new([0x2B, 0x11])).bits(), None);
impl Curve
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pub fn from_oid(oid: &[u8]) -> Curve
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Parses the given OID.
Examples
use sequoia_openpgp as openpgp; use openpgp::types::Curve; assert_eq!(Curve::from_oid(&[0x2B, 0x81, 0x04, 0x00, 0x22]), Curve::NistP384); assert_eq!(Curve::from_oid(&[0x2B, 0x11]), Curve::Unknown(Box::new([0x2B, 0x11])));
pub fn oid(&self) -> &[u8]
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Returns this curve's OID.
Examples
use sequoia_openpgp as openpgp; use openpgp::types::Curve; assert_eq!(Curve::NistP384.oid(), &[0x2B, 0x81, 0x04, 0x00, 0x22]); assert_eq!(Curve::Unknown(Box::new([0x2B, 0x11])).oid(), &[0x2B, 0x11]);
pub fn len(&self) -> Result<usize>
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Returns the length of a coordinate in bits.
Examples
use sequoia_openpgp as openpgp; use openpgp::types::Curve; assert!(if let Ok(256) = Curve::NistP256.len() { true } else { false }); assert!(if let Ok(384) = Curve::NistP384.len() { true } else { false }); assert!(if let Ok(256) = Curve::Ed25519.len() { true } else { false }); assert!(if let Err(_) = Curve::Unknown(Box::new([0x2B, 0x11])).len() { true } else { false });
Errors
Returns Error::UnsupportedEllipticCurve
if the curve is not
supported.
pub fn is_supported(&self) -> bool
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Returns whether this algorithm is supported.
Examples
use sequoia_openpgp as openpgp; use openpgp::types::Curve; assert!(Curve::NistP256.is_supported()); assert!(Curve::NistP384.is_supported()); assert!(Curve::Ed25519.is_supported()); assert!(!Curve::Unknown(Box::new([0x2B, 0x11])).is_supported());
Trait Implementations
impl Clone for Curve
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impl Debug for Curve
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impl Display for Curve
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impl Eq for Curve
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impl Hash for Curve
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fn hash<__H: Hasher>(&self, state: &mut __H)
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fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
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H: Hasher,
impl Ord for Curve
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fn cmp(&self, other: &Curve) -> Ordering
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#[must_use]fn max(self, other: Self) -> Self
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#[must_use]fn min(self, other: Self) -> Self
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#[must_use]fn clamp(self, min: Self, max: Self) -> Self
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impl PartialEq<Curve> for Curve
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impl PartialOrd<Curve> for Curve
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fn partial_cmp(&self, other: &Curve) -> Option<Ordering>
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fn lt(&self, other: &Curve) -> bool
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fn le(&self, other: &Curve) -> bool
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fn gt(&self, other: &Curve) -> bool
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fn ge(&self, other: &Curve) -> bool
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impl StructuralEq for Curve
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impl StructuralPartialEq for Curve
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Auto Trait Implementations
impl RefUnwindSafe for Curve
impl Send for Curve
impl Sync for Curve
impl Unpin for Curve
impl UnwindSafe for Curve
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T> ToString for T where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,