Struct elliptic_curve::ecdh::EphemeralSecret
source · pub struct EphemeralSecret<C>where
C: CurveArithmetic,{ /* private fields */ }Available on crate feature
ecdh only.Expand description
Ephemeral Diffie-Hellman Secret.
These are ephemeral “secret key” values which are deliberately designed to avoid being persisted.
To perform an ephemeral Diffie-Hellman exchange, do the following:
- Have each participant generate an
EphemeralSecretvalue - Compute the
PublicKeyfor that value - Have each peer provide their
PublicKeyto their counterpart - Use
EphemeralSecretand the other participant’sPublicKeyto compute aSharedSecretvalue.
⚠️ SECURITY WARNING ⚠️
Ephemeral Diffie-Hellman exchanges are unauthenticated and without a further authentication step are trivially vulnerable to man-in-the-middle attacks!
These exchanges should be performed in the context of a protocol which takes further steps to authenticate the peers in a key exchange.
Implementations§
source§impl<C> EphemeralSecret<C>where
C: CurveArithmetic,
impl<C> EphemeralSecret<C>where C: CurveArithmetic,
sourcepub fn random(rng: &mut impl CryptoRngCore) -> Self
pub fn random(rng: &mut impl CryptoRngCore) -> Self
Generate a cryptographically random EphemeralSecret.
sourcepub fn public_key(&self) -> PublicKey<C>
pub fn public_key(&self) -> PublicKey<C>
Get the public key associated with this ephemeral secret.
The compress flag enables point compression.
sourcepub fn diffie_hellman(&self, public_key: &PublicKey<C>) -> SharedSecret<C>
pub fn diffie_hellman(&self, public_key: &PublicKey<C>) -> SharedSecret<C>
Compute a Diffie-Hellman shared secret from an ephemeral secret and the public key of the other participant in the exchange.
Trait Implementations§
source§impl<C> Drop for EphemeralSecret<C>where
C: CurveArithmetic,
impl<C> Drop for EphemeralSecret<C>where C: CurveArithmetic,
source§impl<C> From<&EphemeralSecret<C>> for PublicKey<C>where
C: CurveArithmetic,
impl<C> From<&EphemeralSecret<C>> for PublicKey<C>where C: CurveArithmetic,
source§fn from(ephemeral_secret: &EphemeralSecret<C>) -> Self
fn from(ephemeral_secret: &EphemeralSecret<C>) -> Self
Converts to this type from the input type.
source§impl<C> Zeroize for EphemeralSecret<C>where
C: CurveArithmetic,
impl<C> Zeroize for EphemeralSecret<C>where C: CurveArithmetic,
impl<C> ZeroizeOnDrop for EphemeralSecret<C>where C: CurveArithmetic,
Auto Trait Implementations§
impl<C> RefUnwindSafe for EphemeralSecret<C>where <C as CurveArithmetic>::Scalar: RefUnwindSafe,
impl<C> Send for EphemeralSecret<C>
impl<C> Sync for EphemeralSecret<C>
impl<C> Unpin for EphemeralSecret<C>where <C as CurveArithmetic>::Scalar: Unpin,
impl<C> UnwindSafe for EphemeralSecret<C>where <C as CurveArithmetic>::Scalar: UnwindSafe,
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