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| author | Denys Vlasenko | 2018-11-24 14:08:29 +0100 |
|---|---|---|
| committer | Denys Vlasenko | 2018-11-24 14:08:29 +0100 |
| commit | 03569bc50f0d731aa3af94ab600adc59eaac3162 (patch) | |
| tree | 229b93e3a0bdc0b82946fa421a96b39268159c2b /networking/tls_aesgcm.c | |
| parent | 941440cf166ef77ad82c4ead9eae3a8a2552a418 (diff) | |
| download | busybox-03569bc50f0d731aa3af94ab600adc59eaac3162.zip busybox-03569bc50f0d731aa3af94ab600adc59eaac3162.tar.gz | |
tls: speed up xor'ing of aligned 16-byte buffers
function old new delta
xorbuf_aligned_AES_BLOCK_SIZE - 23 +23
xwrite_encrypted 585 580 -5
aesgcm_GHASH 233 228 -5
GMULT 192 187 -5
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/3 up/down: 23/-15) Total: 8 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'networking/tls_aesgcm.c')
| -rw-r--r-- | networking/tls_aesgcm.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/networking/tls_aesgcm.c b/networking/tls_aesgcm.c index db720e5..fd72540 100644 --- a/networking/tls_aesgcm.c +++ b/networking/tls_aesgcm.c @@ -50,8 +50,8 @@ static void RIGHTSHIFTX(byte* x) static void GMULT(byte* X, byte* Y) { - byte Z[AES_BLOCK_SIZE]; - byte V[AES_BLOCK_SIZE]; + byte Z[AES_BLOCK_SIZE] ALIGNED_long; + byte V[AES_BLOCK_SIZE] ALIGNED_long; int i, j; XMEMSET(Z, 0, AES_BLOCK_SIZE); @@ -62,7 +62,7 @@ static void GMULT(byte* X, byte* Y) for (j = 0; j < 8; j++) { if (y & 0x80) { - xorbuf(Z, V, AES_BLOCK_SIZE); + xorbuf_aligned_AES_BLOCK_SIZE(Z, V); } RIGHTSHIFTX(V); @@ -86,8 +86,8 @@ void FAST_FUNC aesgcm_GHASH(byte* h, byte* s //, unsigned sSz ) { - byte x[AES_BLOCK_SIZE] ALIGNED(4); - byte scratch[AES_BLOCK_SIZE] ALIGNED(4); + byte x[AES_BLOCK_SIZE] ALIGNED_long; + byte scratch[AES_BLOCK_SIZE] ALIGNED_long; word32 blocks, partial; //was: byte* h = aes->H; @@ -116,6 +116,7 @@ void FAST_FUNC aesgcm_GHASH(byte* h, blocks = cSz / AES_BLOCK_SIZE; partial = cSz % AES_BLOCK_SIZE; while (blocks--) { + //xorbuf_aligned_AES_BLOCK_SIZE(x, c); - c is not guaranteed to be aligned xorbuf(x, c, AES_BLOCK_SIZE); GMULT(x, h); c += AES_BLOCK_SIZE; @@ -124,7 +125,7 @@ void FAST_FUNC aesgcm_GHASH(byte* h, //XMEMSET(scratch, 0, AES_BLOCK_SIZE); //XMEMCPY(scratch, c, partial); //xorbuf(x, scratch, AES_BLOCK_SIZE); - xorbuf(x, c, partial); + xorbuf(x, c, partial);//same result as above GMULT(x, h); } } @@ -132,7 +133,7 @@ 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(x, scratch, AES_BLOCK_SIZE); + xorbuf_aligned_AES_BLOCK_SIZE(x, scratch); GMULT(x, h); /* Copy the result into s. */ |