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Fix Gimli hash on 16n byte inputs

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Matt Sicker 2020-12-22 22:32:01 -06:00 committed by Veikka Tuominen
parent 55b998c98d
commit d9fe7ea815
1 changed files with 21 additions and 6 deletions
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27
lib/std/crypto/gimli.zig
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@ -229,18 +229,17 @@ pub const Hash = struct {
const buf = self.state.toSlice();
var in = data;
while (in.len > 0) {
var left = State.RATE - self.buf_off;
if (left == 0) {
self.state.permute();
self.buf_off = 0;
left = State.RATE;
}
const left = State.RATE - self.buf_off;
const ps = math.min(in.len, left);
for (buf[self.buf_off .. self.buf_off + ps]) |*p, i| {
p.* ^= in[i];
}
self.buf_off += ps;
in = in[ps..];
if (self.buf_off == State.RATE) {
self.state.permute();
self.buf_off = 0;
}
}
}
@ -277,6 +276,22 @@ test "hash" {
htest.assertEqual("1C9A03DC6A5DDC5444CFC6F4B154CFF5CF081633B2CEA4D7D0AE7CCFED5AAA44", &md);
}
test "hash test vector 17" {
var msg: [32 / 2]u8 = undefined;
try std.fmt.hexToBytes(&msg, "000102030405060708090A0B0C0D0E0F");
var md: [32]u8 = undefined;
hash(&md, &msg, .{});
htest.assertEqual("404C130AF1B9023A7908200919F690FFBB756D5176E056FFDE320016A37C7282", &md);
}
test "hash test vector 33" {
var msg: [32]u8 = undefined;
try std.fmt.hexToBytes(&msg, "000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F");
var md: [32]u8 = undefined;
hash(&md, &msg, .{});
htest.assertEqual("A8F4FA28708BDA7EFB4C1914CA4AFA9E475B82D588D36504F87DBB0ED9AB3C4B", &md);
}
pub const Aead = struct {
pub const tag_length = State.RATE;
pub const nonce_length = 16;