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author | Eric Biggers <ebiggers@google.com> | 2019-03-14 21:21:28 -0700 |
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committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-03-22 20:57:28 +0800 |
commit | b22383c670c877ae6fe722c1e57d20360ba8a6b2 (patch) | |
tree | 8bf5dab42726c4ddcf09bc0af9a55daf8ac80b7c /crypto/salsa20_generic.c | |
parent | 5199c088f03b339542253ffa3f2149c5328610e3 (diff) | |
download | linux-crypto-b22383c670c877ae6fe722c1e57d20360ba8a6b2.tar.gz linux-crypto-b22383c670c877ae6fe722c1e57d20360ba8a6b2.zip |
crypto: salsa20-generic - use crypto_xor_cpy()
In salsa20_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/salsa20_generic.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/crypto/salsa20_generic.c b/crypto/salsa20_generic.c index 00fce32a..443fba09 100644 --- a/crypto/salsa20_generic.c +++ b/crypto/salsa20_generic.c @@ -86,18 +86,17 @@ static void salsa20_docrypt(u32 *state, u8 *dst, const u8 *src, { __le32 stream[SALSA20_BLOCK_SIZE / sizeof(__le32)]; - if (dst != src) - memcpy(dst, src, bytes); - while (bytes >= SALSA20_BLOCK_SIZE) { salsa20_block(state, stream); - crypto_xor(dst, (const u8 *)stream, SALSA20_BLOCK_SIZE); + crypto_xor_cpy(dst, src, (const u8 *)stream, + SALSA20_BLOCK_SIZE); bytes -= SALSA20_BLOCK_SIZE; dst += SALSA20_BLOCK_SIZE; + src += SALSA20_BLOCK_SIZE; } if (bytes) { salsa20_block(state, stream); - crypto_xor(dst, (const u8 *)stream, bytes); + crypto_xor_cpy(dst, src, (const u8 *)stream, bytes); } } |