#[repr(C)]
pub struct Signature { /* private fields */ }
Expand description

Ed25519 signature.

This type represents a container for the byte serialization of an Ed25519 signature, and does not necessarily represent well-formed field or curve elements.

Signature verification libraries are expected to reject invalid field elements at the time a signature is verified.

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impl Signature

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pub const BYTE_SIZE: usize = 64usize

Size of an encoded Ed25519 signature in bytes.

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pub fn from_bytes(bytes: &[u8; 64]) -> Signature

Parse an Ed25519 signature from a byte slice.

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pub fn from_components(R: [u8; 32], s: [u8; 32]) -> Signature

Parse an Ed25519 signature from its R and s components.

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pub fn from_slice(bytes: &[u8]) -> Result<Signature, Error>

Parse an Ed25519 signature from a byte slice.

§Returns
  • Ok on success
  • Err if the input byte slice is not 64-bytes
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pub fn r_bytes(&self) -> &[u8; 32]

Bytes for the R component of a signature.

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pub fn s_bytes(&self) -> &[u8; 32]

Bytes for the s component of a signature.

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pub fn to_bytes(&self) -> [u8; 64]

Return the inner byte array.

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

Available on crate feature alloc only.

Convert this signature into a byte vector.

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impl Clone for Signature

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fn clone(&self) -> Signature

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 Signature

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

Formats the value using the given formatter. Read more
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impl<'de> Deserialize<'de> for Signature

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fn deserialize<D>( deserializer: D ) -> Result<Signature, <D as Deserializer<'de>>::Error>
where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl<D> DigestSigner<D, Signature> for Context<'_, '_, SigningKey>
where D: Digest<OutputSize = U64>,

Available on crate feature digest only.

Equivalent to SigningKey::sign_prehashed with context set to Some containing self.value().

§Note

The RFC only permits SHA-512 to be used for prehashing. This function technically works, and is probably safe to use, with any secure hash function with 512-bit digests, but anything outside of SHA-512 is NOT specification-compliant. We expose crate::Sha512 for user convenience.

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fn try_sign_digest(&self, msg_digest: D) -> Result<Signature, SignatureError>

Attempt to sign the given prehashed message Digest, returning a digital signature on success, or an error if something went wrong.
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fn sign_digest(&self, digest: D) -> S

Sign the given prehashed message Digest, returning a signature. Read more
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impl<D> DigestSigner<D, Signature> for SigningKey
where D: Digest<OutputSize = U64>,

Available on crate feature digest only.

Equivalent to SigningKey::sign_prehashed with context set to None.

§Note

The RFC only permits SHA-512 to be used for prehashing. This function technically works, and is probably safe to use, with any secure hash function with 512-bit digests, but anything outside of SHA-512 is NOT specification-compliant. We expose crate::Sha512 for user convenience.

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fn try_sign_digest(&self, msg_digest: D) -> Result<Signature, SignatureError>

Attempt to sign the given prehashed message Digest, returning a digital signature on success, or an error if something went wrong.
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fn sign_digest(&self, digest: D) -> S

Sign the given prehashed message Digest, returning a signature. Read more
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impl<MsgDigest> DigestVerifier<MsgDigest, Signature> for Context<'_, '_, VerifyingKey>
where MsgDigest: Digest<OutputSize = U64>,

Available on crate feature digest only.

Equivalent to VerifyingKey::verify_prehashed with context set to Some containing self.value().

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fn verify_digest( &self, msg_digest: MsgDigest, signature: &Signature ) -> Result<(), SignatureError>

Verify the signature against the given Digest output.
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impl<MsgDigest> DigestVerifier<MsgDigest, Signature> for VerifyingKey
where MsgDigest: Digest<OutputSize = U64>,

Available on crate feature digest only.

Equivalent to VerifyingKey::verify_prehashed with context set to None.

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fn verify_digest( &self, msg_digest: MsgDigest, signature: &Signature ) -> Result<(), SignatureError>

Verify the signature against the given Digest output.
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impl Display for Signature

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

Formats the value using the given formatter. Read more
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impl From<&[u8; 64]> for Signature

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fn from(bytes: &[u8; 64]) -> Signature

Converts to this type from the input type.
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impl From<[u8; 64]> for Signature

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fn from(bytes: [u8; 64]) -> Signature

Converts to this type from the input type.
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impl FromStr for Signature

Decode a signature from hexadecimal.

Upper and lower case hexadecimal are both accepted, however mixed case is rejected.

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type Err = Error

The associated error which can be returned from parsing.
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fn from_str(hex: &str) -> Result<Signature, Error>

Parses a string s to return a value of this type. Read more
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impl LowerHex for Signature

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

Formats the value using the given formatter.
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impl PartialEq for Signature

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fn eq(&self, other: &Signature) -> 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 Serialize for Signature

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fn serialize<S>( &self, serializer: S ) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl SignatureEncoding for Signature

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type Repr = [u8; 64]

Byte representation of a signature.
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fn to_bytes(&self) -> [u8; 64]

Encode signature as its byte representation.
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fn to_vec(&self) -> Vec<u8>

Available on crate feature alloc only.
Encode signature as a byte vector.
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fn encoded_len(&self) -> usize

Get the length of this signature when encoded.
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impl Signer<Signature> for SigningKey

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fn try_sign(&self, message: &[u8]) -> Result<Signature, SignatureError>

Sign a message with this signing key’s secret key.

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fn sign(&self, msg: &[u8]) -> S

Sign the given message and return a digital signature
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impl TryFrom<&[u8]> for Signature

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type Error = Error

The type returned in the event of a conversion error.
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fn try_from(bytes: &[u8]) -> Result<Signature, Error>

Performs the conversion.
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impl UpperHex for Signature

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

Formats the value using the given formatter.
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impl Verifier<Signature> for SigningKey

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fn verify( &self, message: &[u8], signature: &Signature ) -> Result<(), SignatureError>

Verify a signature on a message with this signing key’s public key.

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impl Verifier<Signature> for VerifyingKey

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fn verify( &self, message: &[u8], signature: &Signature ) -> Result<(), SignatureError>

Verify a signature on a message with this keypair’s public key.

§Return

Returns Ok(()) if the signature is valid, and Err otherwise.

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impl Copy for Signature

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impl Eq for Signature

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impl StructuralPartialEq for Signature

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where 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 T
where 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 T
where 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 T
where 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> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where 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> ToString for T
where T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for T
where 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 T
where 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.
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impl<T> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,