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RelayCellBody

tor_proto::crypto::cell

Struct RelayCellBody 

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pub struct RelayCellBody(BoxedCellBody);
Expand description

Type for the body of a relay cell.

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§0: BoxedCellBody

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impl RelayCellBody

Functions on RelayCellBody that implement the digest/recognized algorithm.

The current relay crypto protocol uses two wholly inadequate fields to see whether a cell is intended for its current recipient: a two-byte “recognized” field that needs to be all-zero; and a four-byte “digest” field containing a running digest of all cells (for this recipient) to this one, seeded with an initial value (either Df or Db in the spec).

These operations are described in tor-spec section 6.1 “Relay cells”

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fn recognized(&self) -> &[u8] ⓘ

Returns the byte slice of the recognized field.

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fn recognized_mut(&mut self) -> &mut [u8] ⓘ

Returns the mut byte slice of the recognized field.

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fn digest(&self) -> &[u8] ⓘ

Returns the byte slice of the digest field.

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fn digest_mut(&mut self) -> &mut [u8] ⓘ

Returns the mut byte slice of the digest field.

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pub fn set_digest<D: Digest + Clone>( &mut self, d: &mut D, sendme_tag: &mut SendmeTag, )

Prepare a cell body by setting its digest and recognized field.

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pub fn is_recognized<D: Digest + Clone>( &self, d: &mut D, rcvd: &mut SendmeTag, ) -> bool

Check whether this just-decrypted cell is now an authenticated plaintext.

This method returns true if the recognized field is all zeros, and if the digest field is a digest of the correct material. If it returns true, it also sets rcvg to the appropriate authenticated SENDME tag to use if acknowledging this message.

If this method returns false, then either further decryption is required, or the cell is corrupt.

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impl AsMut<[u8]> for RelayCellBody

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fn as_mut(&mut self) -> &mut [u8] ⓘ

Converts this type into a mutable reference of the (usually inferred) input type.
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impl AsRef<[u8]> for RelayCellBody

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fn as_ref(&self) -> &[u8] ⓘ

Converts this type into a shared reference of the (usually inferred) input type.
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impl Clone for RelayCellBody

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fn clone(&self) -> RelayCellBody

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl From<Box<[u8; 509]>> for RelayCellBody

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fn from(value: BoxedCellBody) -> Self

Converts to this type from the input type.
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impl From<RelayCellBody> for BoxedCellBody

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fn from(value: RelayCellBody) -> Self

Converts to this type from the input type.

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