Struct ciphersuite::Ed25519

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pub struct Ed25519;
Available on crate features dalek and ed25519 only.
Expand description

Ciphersuite for Ed25519, inspired by RFC-8032.

hash_to_F is implemented with a naive concatenation of the dst and data, allowing transposition between the two. This means dst: b"abc", data: b"def", will produce the same scalar as dst: "abcdef", data: b"". Please use carefully, not letting dsts be substrings of each other.

Trait Implementations§

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impl Ciphersuite for Ed25519

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type F = Scalar

Scalar field element type.
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type G = EdwardsPoint

Group element type.
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type H = CoreWrapper<CtVariableCoreWrapper<Sha512VarCore, UInt<UInt<UInt<UInt<UInt<UInt<UInt<UTerm, B1>, B0>, B0>, B0>, B0>, B0>, B0>, OidSha512>>

Hash algorithm used with this curve.
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const ID: &'static [u8] = b"edwards25519"

ID for this curve.
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fn generator() -> Self::G

Generator for the group.
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fn hash_to_F(dst: &[u8], data: &[u8]) -> Self::F

Hash the provided domain-separation tag and message to a scalar. Ciphersuites MAY naively prefix the tag to the message, enabling transpotion between the two. Accordingly, this function should NOT be used in any scheme where one tag is a valid substring of another UNLESS the specific Ciphersuite is verified to handle the DST securely. Read more
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fn random_nonzero_F<R: RngCore + CryptoRng>(rng: &mut R) -> Self::F

Generate a random non-zero scalar.
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fn read_F<R: Read>(reader: &mut R) -> Result<Self::F>

Available on crate features alloc or std only.
Read a canonical scalar from something implementing std::io::Read.
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fn read_G<R: Read>(reader: &mut R) -> Result<Self::G>

Available on crate features alloc or std only.
Read a canonical point from something implementing std::io::Read.
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impl Clone for Ed25519

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fn clone(&self) -> Ed25519

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 Debug for Ed25519

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

Formats the value using the given formatter. Read more
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impl PartialEq for Ed25519

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fn eq(&self, other: &Ed25519) -> bool

This method tests for self and other values to be equal, and is used by ==.
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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.
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impl Zeroize for Ed25519

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fn zeroize(&mut self)

Zero out this object from memory using Rust intrinsics which ensure the zeroization operation is not “optimized away” by the compiler.
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impl Copy for Ed25519

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impl Eq for Ed25519

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impl StructuralPartialEq for Ed25519

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🔬This is a nightly-only experimental API. (clone_to_uninit)
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default unsafe fn clone_to_uninit(&self, dst: *mut T)

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