monero_clsag

Struct Clsag

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pub struct Clsag {
    pub D: EdwardsPoint,
    pub s: Vec<Scalar>,
    pub c1: Scalar,
}
Expand description

The CLSAG signature, as used in Monero.

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§D: EdwardsPoint

The difference of the commitment randomnesses, scaling the key image generator.

§s: Vec<Scalar>

The responses for each ring member.

§c1: Scalar

The first challenge in the ring.

Implementations§

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impl Clsag

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pub fn sign<R: RngCore + CryptoRng>( rng: &mut R, inputs: Vec<(Zeroizing<Scalar>, ClsagContext)>, sum_outputs: Scalar, msg: [u8; 32], ) -> Result<Vec<(Clsag, EdwardsPoint)>, ClsagError>

Sign CLSAG signatures for the provided inputs.

Monero ensures the rerandomized input commitments have the same value as the outputs by checking sum(rerandomized_input_commitments) - sum(output_commitments) == 0. This requires not only the amounts balance, yet also sum(input_commitment_masks) - sum(output_commitment_masks).

Monero solves this by following the wallet protocol to determine each output commitment’s randomness, then using random masks for all but the last input. The last input is rerandomized to the necessary mask for the equation to balance.

Due to Monero having this behavior, it only makes sense to sign CLSAGs as a list, hence this API being the way it is.

inputs is of the form (discrete logarithm of the key, context).

sum_outputs is for the sum of the output commitments’ masks.

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pub fn verify( &self, ring: &[[EdwardsPoint; 2]], I: &EdwardsPoint, pseudo_out: &EdwardsPoint, msg: &[u8; 32], ) -> Result<(), ClsagError>

Verify a CLSAG signature for the provided context.

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pub fn write<W: Write>(&self, w: &mut W) -> Result<()>

Write a CLSAG.

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pub fn read<R: Read>(decoys: usize, r: &mut R) -> Result<Clsag>

Read a CLSAG.

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impl Clone for Clsag

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fn clone(&self) -> Clsag

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 Clsag

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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 PartialEq for Clsag

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fn eq(&self, other: &Clsag) -> 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 Eq for Clsag

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impl StructuralPartialEq for Clsag

Auto Trait Implementations§

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impl Freeze for Clsag

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impl RefUnwindSafe for Clsag

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impl Send for Clsag

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impl Sync for Clsag

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impl Unpin for Clsag

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impl UnwindSafe for Clsag

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🔬This is a nightly-only experimental API. (clone_to_uninit)
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Size: 216 bytes