ExpandedKeypair

tor_llcrypto::pk::ed25519

Struct ExpandedKeypair 

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pub struct ExpandedKeypair { /* private fields */ }
Expand description

A variant of Keypair containing an ExpandedSecretKey.

In the Tor protocol, we use this type for blinded onion service identity keys (KS_hs_blind_id). Since their scalar values are computed, rather than taken directly from a SHA-512 transformation of a SecretKey, we cannot use the regular Keypair type.

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impl ExpandedKeypair

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pub fn public(&self) -> &PublicKey

Return the public part of this expanded keypair.

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pub fn sign(&self, message: &[u8]) -> Signature

Compute a signature over a message using this keypair.

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

Return a representation of the secret key in this keypair.

(Since it is an expanded secret key, we represent it as its scalar part followed by its hash_prefix.)

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pub fn from_secret_key_bytes(bytes: [u8; 64]) -> Option<Self>

Reconstruct a key from its byte representation as returned by to_secret_key_bytes().

Return None if the input cannot be the output of to_secret_key_bytes().

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impl Ed25519SigningKey for ExpandedKeypair

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fn sign(&self, message: &[u8]) -> Signature

Sign a message with this key.
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impl<'a> From<&'a Keypair> for ExpandedKeypair

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fn from(kp: &'a Keypair) -> ExpandedKeypair

Converts to this type from the input type.
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impl From<ExpandedKeypair> for PublicKey

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fn from(ekp: ExpandedKeypair) -> PublicKey

Converts to this type from the input type.

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Size: 256 bytes