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crypto.AegisMac: fix a regression from s/mem.copy/@memcpy/ (#15733)

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In an update whose size is not a multiple of the block size,
we would end up calling @memcpy() with arguments of different sizes.
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Frank Denis 2023-05-17 01:51:47 +02:00 • committed by GitHub
parent c269e16c3b
commit c6966486e3
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1 changed files with 7 additions and 1 deletions
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8
lib/std/crypto/aegis.zig
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@ -470,8 +470,8 @@ fn AegisMac(comptime T: type) type {
self.state.absorb(b[i..][0..block_length]);
}
if (i != b.len) {
@memcpy(self.buf[0..], b[i..]);
self.off = b.len - i;
@memcpy(self.buf[0..self.off], b[i..]);
}
}
@ -653,4 +653,10 @@ test "Aegis MAC" {
const nonce = [_]u8{0x00} ** Aegis128L_256.nonce_length;
Aegis128L_256.encrypt(&empty, &tag, &empty, &msg, nonce, key);
try htest.assertEqual("f8840849602738d81037cbaa0f584ea95759e2ac60263ce77346bcdc79fe4319", &tag);
// An update whose size is not a multiple of the block size
st = st_init;
st.update(msg[0..33]);
st.final(&tag);
try htest.assertEqual("c7cf649a844c1a6676cf6d91b1658e0aee54a4da330b0a8d3bc7ea4067551d1b", &tag);
}