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blake2s: off-by-one on update

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This commit is contained in:
Mantas Jonytis 2020-08-01 15:15:45 +03:00
parent fad87bef9a
commit b1cf0196df
1 changed files with 2 additions and 2 deletions
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4
lib/std/crypto/blake2.zig
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@ -94,7 +94,7 @@ fn Blake2s(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 >= 64) {
if (d.buf_len != 0 and d.buf_len + b.len > 64) {
off += 64 - d.buf_len;
mem.copy(u8, d.buf[d.buf_len..], b[0..off]);
d.t += 64;
@ -103,7 +103,7 @@ fn Blake2s(comptime out_len: usize) type {
}
// Full middle blocks.
while (off + 64 <= b.len) : (off += 64) {
while (off + 64 < b.len) : (off += 64) {
d.t += 64;
d.round(b[off .. off + 64], false);
}