SealedHost

Enum SealedHost 

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pub enum SealedHost {
    Plain(IpOrHost),
    Sealed(Box<[u8]>),
}
Expand description

Contains optionally encrypted IpOrHost.

This is useful for hiding the IpOrHost instance from the Entry node. The client first encrypts the IpOrHost instance via SealedHost::seal using the Exit node’s public key. Upon receiving the SealedHost instance by the Exit node, it can call SealedHost::unseal using its private key to get the original IpOrHost instance.

Sealing is fully randomized and therefore does not leak information about equal IpOrHost instances.

The length of the encrypted host is also obscured by the use of random padding before encryption.

§Example

use hopr_crypto_types::prelude::{Keypair, OffchainKeypair};
use hopr_network_types::prelude::{IpOrHost, SealedHost};
use libp2p_identity::PeerId;

let keypair = OffchainKeypair::random();

let exit_node_peer_id: PeerId = keypair.public().into();
let host: IpOrHost = "127.0.0.1:1000".parse()?;

// On the Client
let encrypted = SealedHost::seal(host.clone(), keypair.public().into())?;

// On the Exit node
let decrypted = encrypted.unseal(&keypair)?;
assert_eq!(host, decrypted);

// Plain SealedHost unseals trivially
let plain_sealed: SealedHost = host.clone().into();
assert_eq!(host, plain_sealed.try_into()?);

// The same host sealing is randomized
let encrypted_1 = SealedHost::seal(host.clone(), keypair.public().into())?;
let encrypted_2 = SealedHost::seal(host.clone(), keypair.public().into())?;
assert_ne!(encrypted_1, encrypted_2);

Variants§

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Plain(IpOrHost)

Plain (not sealed) IpOrHost

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Sealed(Box<[u8]>)

Encrypted IpOrHost

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impl SealedHost

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pub fn try_as_plain(self) -> Option<IpOrHost>

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pub const fn try_as_plain_ref(&self) -> Option<&IpOrHost>

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pub fn try_as_plain_mut(&mut self) -> Option<&mut IpOrHost>

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pub fn try_as_sealed(self) -> Option<Box<[u8]>>

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pub const fn try_as_sealed_ref(&self) -> Option<&Box<[u8]>>

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pub fn try_as_sealed_mut(&mut self) -> Option<&mut Box<[u8]>>

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impl SealedHost

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pub const PADDING_CHAR: char = '@'

Character that can be appended to the host to obscure its length.

User can add as many of this character to the host, and it will be removed during unsealing.

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pub fn seal(host: IpOrHost, peer_id: PeerId) -> Result<Self>

Seals the given IpOrHost using the Exit node’s peer ID.

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pub fn unseal(self, key: &OffchainKeypair) -> Result<IpOrHost>

Tries to unseal the sealed IpOrHost using the private key as Exit node. No-op, if the data is already unsealed.

Trait Implementations§

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impl Clone for SealedHost

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fn clone(&self) -> SealedHost

Returns a duplicate of the value. Read more
1.0.0 · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for SealedHost

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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<'de> Deserialize<'de> for SealedHost

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl Display for SealedHost

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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 From<IpOrHost> for SealedHost

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fn from(value: IpOrHost) -> Self

Converts to this type from the input type.
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impl Hash for SealedHost

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl PartialEq for SealedHost

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

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 SealedHost

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl TryFrom<SealedHost> for IpOrHost

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type Error = NetworkTypeError

The type returned in the event of a conversion error.
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fn try_from(value: SealedHost) -> Result<Self, Self::Error>

Performs the conversion.
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impl Eq for SealedHost

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impl StructuralPartialEq for SealedHost

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Gets the TypeId of self. Read more
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Immutably borrows from an owned value. Read more
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🔬This is a nightly-only experimental API. (clone_to_uninit)
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