Enum sequoia_openpgp::types::Curve[][src]

pub enum Curve {
    NistP256,
    NistP384,
    NistP521,
    BrainpoolP256,
    BrainpoolP512,
    Ed25519,
    Cv25519,
    Unknown(Box<[u8]>),
}
Expand description

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.

Note: This enum cannot be exhaustively matched to allow future extensions.

Variants

NistP256

NIST curve P-256.

NistP384

NIST curve P-384.

NistP521

NIST curve P-521.

BrainpoolP256

brainpoolP256r1.

BrainpoolP512

brainpoolP512r1.

Ed25519

D.J. Bernstein’s “Twisted” Edwards curve Ed25519.

Cv25519

Elliptic curve Diffie-Hellman using D.J. Bernstein’s Curve25519.

Unknown(Box<[u8]>)

Tuple Fields

0: Box<[u8]>

Unknown curve.

Implementations

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);

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])));

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]);

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.

Returns whether this algorithm is supported.

Examples
use sequoia_openpgp as openpgp;
use openpgp::types::Curve;

assert!(Curve::Ed25519.is_supported());
assert!(!Curve::Unknown(Box::new([0x2B, 0x11])).is_supported());

Trait Implementations

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Formats the value using the given formatter. Read more

Feeds this value into the given Hasher. Read more

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

This method returns an Ordering between self and other. Read more

Compares and returns the maximum of two values. Read more

Compares and returns the minimum of two values. Read more

Restrict a value to a certain interval. Read more

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

This method tests for !=.

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

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

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

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

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

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Performs the conversion.

Performs the conversion.

Should always be Self

The resulting type after obtaining ownership.

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

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

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

Converts the given value to a String. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.