light_hasher/
sha256.rs

1use crate::{
2    errors::HasherError,
3    zero_bytes::{sha256::ZERO_BYTES, ZeroBytes},
4    zero_indexed_leaf::sha256::ZERO_INDEXED_LEAF,
5    Hash, Hasher,
6};
7
8#[derive(Clone, Copy)] // To allow using with zero copy Solana accounts.
9pub struct Sha256;
10
11impl Hasher for Sha256 {
12    fn hash(val: &[u8]) -> Result<Hash, HasherError> {
13        Self::hashv(&[val])
14    }
15
16    fn hashv(vals: &[&[u8]]) -> Result<Hash, HasherError> {
17        #[cfg(not(target_os = "solana"))]
18        {
19            use sha2::{Digest, Sha256};
20
21            let mut hasher = Sha256::default();
22            for val in vals {
23                hasher.update(val);
24            }
25            Ok(hasher.finalize().into())
26        }
27        // Call via a system call to perform the calculation
28        #[cfg(target_os = "solana")]
29        {
30            use crate::HASH_BYTES;
31
32            let mut hash_result = [0; HASH_BYTES];
33            unsafe {
34                crate::syscalls::sol_sha256(
35                    vals as *const _ as *const u8,
36                    vals.len() as u64,
37                    &mut hash_result as *mut _ as *mut u8,
38                );
39            }
40            Ok(hash_result)
41        }
42    }
43
44    fn zero_bytes() -> ZeroBytes {
45        ZERO_BYTES
46    }
47
48    fn zero_indexed_leaf() -> [u8; 32] {
49        ZERO_INDEXED_LEAF
50    }
51}
light_hasher/sha256.rs

light_hasher/
sha256.rs
