UPSTREAM: crypto: chacha20 - Use unaligned access macros when loading key and IV
The generic ChaCha20 implementation has a cra_alignmask of 3, which
ensures that the key passed into crypto_chacha20_setkey() and the IV
passed into crypto_chacha20_init() are 4-byte aligned. However, these
functions are also called from the ARM and ARM64 implementations of
ChaCha20, which intentionally do not have a cra_alignmask set. This is
broken because 32-bit words are being loaded from potentially-unaligned
buffers without the unaligned access macros.
Fix it by using the unaligned access macros when loading the key and IV.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
(cherry picked from commit dbd872a123fab81d0fa235a265c39e5ccdf735b3)
Bug: 112008522
Test: As series, see Ic61c13b53facfd2173065be715a7ee5f3af8760b
Change-Id: I1809f6ffe0b679a2554a660eaca360d0fa3b0dd1
Signed-off-by: Eric Biggers <ebiggers@google.com>
1 file changed