snarkvm_console_algorithms/poseidon/
hash_many.rs

1// Copyright 2024 Aleo Network Foundation
2// This file is part of the snarkVM library.
3
4// Licensed under the Apache License, Version 2.0 (the "License");
5// you may not use this file except in compliance with the License.
6// You may obtain a copy of the License at:
7
8// http://www.apache.org/licenses/LICENSE-2.0
9
10// Unless required by applicable law or agreed to in writing, software
11// distributed under the License is distributed on an "AS IS" BASIS,
12// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13// See the License for the specific language governing permissions and
14// limitations under the License.
15
16use super::*;
17
18impl<E: Environment, const RATE: usize> HashMany for Poseidon<E, RATE> {
19    type Input = Field<E>;
20    type Output = Field<E>;
21
22    /// Returns the cryptographic hash for a list of field elements as input,
23    /// and returns the specified number of field elements as output.
24    #[inline]
25    fn hash_many(&self, input: &[Self::Input], num_outputs: u16) -> Vec<Self::Output> {
26        // Construct the preimage: [ DOMAIN || LENGTH(INPUT) || [0; RATE-2] || INPUT ].
27        let mut preimage = Vec::with_capacity(RATE + input.len());
28        preimage.push(self.domain);
29        preimage.push(Field::<E>::from_u128(input.len() as u128));
30        preimage.resize(RATE, Field::<E>::zero()); // Pad up to RATE.
31        preimage.extend_from_slice(input);
32
33        let mut sponge = PoseidonSponge::<E, RATE, CAPACITY>::new(&self.parameters);
34        sponge.absorb(&preimage);
35        sponge.squeeze(num_outputs).into_vec()
36    }
37}
snarkvm_console_algorithms/poseidon/hash_many.rs

snarkvm_console_algorithms/poseidon/
hash_many.rs
