diff options
| -rw-r--r-- | src/librustc_data_structures/blake2b.rs | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/src/librustc_data_structures/blake2b.rs b/src/librustc_data_structures/blake2b.rs index 8c82c135dc4..31492e26219 100644 --- a/src/librustc_data_structures/blake2b.rs +++ b/src/librustc_data_structures/blake2b.rs @@ -113,17 +113,20 @@ fn blake2b_compress(ctx: &mut Blake2bCtx, last: bool) { } { - // Re-interpret the input buffer in the state as u64s + // Re-interpret the input buffer in the state as an array + // of little-endian u64s, converting them to machine + // endianness. It's OK to modify the buffer in place + // since this is the last time this data will be accessed + // before it's overwritten. + let m: &mut [u64; 16] = unsafe { let b: &mut [u8; 128] = &mut ctx.b; ::std::mem::transmute(b) }; - // It's OK to modify the buffer in place since this is the last time - // this data will be accessed before it's overwritten if cfg!(target_endian = "big") { for word in &mut m[..] { - *word = word.to_be(); + *word = u64::from_le(*word); } } @@ -209,9 +212,10 @@ fn blake2b_final(ctx: &mut Blake2bCtx) blake2b_compress(ctx, true); + // Modify our buffer to little-endian format as it will be read + // as a byte array. It's OK to modify the buffer in place since + // this is the last time this data will be accessed. if cfg!(target_endian = "big") { - // Make sure that the data is in memory in little endian format, as is - // demanded by BLAKE2 for word in &mut ctx.h { *word = word.to_le(); } |