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author | Eric Biggers <ebiggers@google.com> | 2019-03-14 21:20:36 -0700 |
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committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-03-22 20:57:28 +0800 |
commit | 5199c088f03b339542253ffa3f2149c5328610e3 (patch) | |
tree | 559765d7c26f6f182d0fad3d674fc7e0c4293032 | |
parent | 0bb1644fec54e2a9addf03419868bb427d3cf284 (diff) | |
download | linux-crypto-5199c088f03b339542253ffa3f2149c5328610e3.tar.gz linux-crypto-5199c088f03b339542253ffa3f2149c5328610e3.zip |
crypto: chacha-generic - use crypto_xor_cpy()
In chacha_docrypt(), use crypto_xor_cpy() instead of crypto_xor().
This avoids having to memcpy() the src buffer to the dst buffer.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to '')
-rw-r--r-- | crypto/chacha_generic.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/crypto/chacha_generic.c b/crypto/chacha_generic.c index 90ec0ec1..a7fae9b7 100644 --- a/crypto/chacha_generic.c +++ b/crypto/chacha_generic.c @@ -22,18 +22,16 @@ static void chacha_docrypt(u32 *state, u8 *dst, const u8 *src, /* aligned to potentially speed up crypto_xor() */ u8 stream[CHACHA_BLOCK_SIZE] __aligned(sizeof(long)); - if (dst != src) - memcpy(dst, src, bytes); - while (bytes >= CHACHA_BLOCK_SIZE) { chacha_block(state, stream, nrounds); - crypto_xor(dst, stream, CHACHA_BLOCK_SIZE); + crypto_xor_cpy(dst, src, stream, CHACHA_BLOCK_SIZE); bytes -= CHACHA_BLOCK_SIZE; dst += CHACHA_BLOCK_SIZE; + src += CHACHA_BLOCK_SIZE; } if (bytes) { chacha_block(state, stream, nrounds); - crypto_xor(dst, stream, bytes); + crypto_xor_cpy(dst, src, stream, bytes); } } |