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tls: code shrink

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function                                             old     new   delta
aesgcm_GHASH                                         223     196     -27

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2018-11-25 14:03:59 +01:00
parent 23d0d8caf4
commit be5ca42e8d
2 changed files with 14 additions and 6 deletions
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18
networking/tls_aesgcm.c
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@@ -87,8 +87,8 @@ void FAST_FUNC aesgcm_GHASH(byte* h,
)
{
byte x[AES_BLOCK_SIZE] ALIGNED_long;
byte scratch[AES_BLOCK_SIZE] ALIGNED_long;
word32 blocks, partial;
// byte scratch[AES_BLOCK_SIZE] ALIGNED_long;
unsigned blocks, partial;
//was: byte* h = aes->H;
//XMEMSET(x, 0, AES_BLOCK_SIZE);
@@ -133,9 +133,17 @@ void FAST_FUNC aesgcm_GHASH(byte* h,
}
/* Hash in the lengths of A and C in bits */
FlattenSzInBits(&scratch[0], aSz);
FlattenSzInBits(&scratch[8], cSz);
xorbuf_aligned_AES_BLOCK_SIZE(x, scratch);
//FlattenSzInBits(&scratch[0], aSz);
//FlattenSzInBits(&scratch[8], cSz);
//xorbuf_aligned_AES_BLOCK_SIZE(x, scratch);
// simpler:
#define P32(v) ((uint32_t*)v)
//P32(x)[0] ^= 0;
P32(x)[1] ^= SWAP_BE32(aSz * 8);
//P32(x)[2] ^= 0;
P32(x)[3] ^= SWAP_BE32(cSz * 8);
#undef P32
GMULT(x, h);
/* Copy the result into s. */