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blake2b: off-by-one on update

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Mantas Jonytis
2020-08-01 15:31:46 +03:00
parent eee9abe1b4
commit 1ae40146e6
1 changed files with 2 additions and 2 deletions
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4
lib/std/crypto/blake2.zig
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@@ -382,7 +382,7 @@ fn Blake2b(comptime out_len: usize) type {
var off: usize = 0;
// Partial buffer exists from previous update. Copy into buffer then hash.
if (d.buf_len != 0 and d.buf_len + b.len >= 128) {
if (d.buf_len != 0 and d.buf_len + b.len > 128) {
off += 128 - d.buf_len;
mem.copy(u8, d.buf[d.buf_len..], b[0..off]);
d.t += 128;
@@ -391,7 +391,7 @@ fn Blake2b(comptime out_len: usize) type {
}
// Full middle blocks.
while (off + 128 <= b.len) : (off += 128) {
while (off + 128 < b.len) : (off += 128) {
d.t += 128;
d.round(b[off .. off + 128], false);
}