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Monero: add more legacy verify functions (#383)

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* Add v1 ring sig verifying

* allow calculating signature hash for v1 txs

* add unreduced scalar type with recovery

I have added this type for borromen sigs, the ee field can be a normal
scalar as in the verify function the ee
field is checked against a reduced scalar mean for it to verify as
correct ee must be reduced

* change block major/ minor versions to u8

this matches Monero

I have also changed a couple varint functions to accept the `VarInt`
trait

* expose `serialize_hashable` on `Block`

* add back MLSAG verifying functions

I still need to revert the commit removing support for >1 input MLSAG FULL

This adds a new rct type to separate Full and simple rct

* add back support for multiple inputs for RCT FULL

* comment `non_adjacent_form` function

also added `#[allow(clippy::needless_range_loop)]` around a loop as without a re-write satisfying clippy without it will make the function worse.

* Improve Mlsag verifying API

* fix rebase errors

* revert the changes on `reserialize_chain`
plus other misc changes

* fix no-std

* Reduce the amount of rpc calls needed for `get_block_by_number`.
This function was causing me problems, every now and then a node would return a block with a different number than requested.

* change `serialize_hashable` to give the POW hashing blob.

Monero calculates the POW hash and the block hash using *slightly* different blobs :/

* make ring_signatures public and add length check when verifying.

* Misc improvements and bug fixes

---------

Co-authored-by: Luke Parker <lukeparker5132@gmail.com>
This commit is contained in:
Boog900
2023-11-12 15:18:18 +00:00
committed by GitHub
parent 54f1929078
commit 995734c960
19 changed files with 537 additions and 159 deletions
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6
coins/monero/src/ringct/clsag/mod.rs
View File

@@ -180,7 +180,7 @@ fn core(
let c_c = mu_C * c;
let L = (&s[i] * ED25519_BASEPOINT_TABLE) + (c_p * P[i]) + (c_c * C[i]);
let PH = hash_to_point(P[i]);
let PH = hash_to_point(&P[i]);
// Shouldn't be an issue as all of the variables in this vartime statement are public
let R = (s[i] * PH) + images_precomp.vartime_multiscalar_mul([c_p, c_c]);
@@ -219,7 +219,7 @@ impl Clsag {
let pseudo_out = Commitment::new(mask, input.commitment.amount).calculate();
let z = input.commitment.mask - mask;
let H = hash_to_point(input.decoys.ring[r][0]);
let H = hash_to_point(&input.decoys.ring[r][0]);
let D = H * z;
let mut s = Vec::with_capacity(input.decoys.ring.len());
for _ in 0 .. input.decoys.ring.len() {
@@ -259,7 +259,7 @@ impl Clsag {
&msg,
nonce.deref() * ED25519_BASEPOINT_TABLE,
nonce.deref() *
hash_to_point(inputs[i].2.decoys.ring[usize::from(inputs[i].2.decoys.i)][0]),
hash_to_point(&inputs[i].2.decoys.ring[usize::from(inputs[i].2.decoys.i)][0]),
);
clsag.s[usize::from(inputs[i].2.decoys.i)] =
(-((p * inputs[i].0.deref()) + c)) + nonce.deref();