• Eric Biggers's avatar
    crypto: chacha20 - Fix keystream alignment for chacha20_block() · 9f480fae
    Eric Biggers authored
    When chacha20_block() outputs the keystream block, it uses 'u32' stores
    directly.  However, the callers (crypto/chacha20_generic.c and
    drivers/char/random.c) declare the keystream buffer as a 'u8' array,
    which is not guaranteed to have the needed alignment.
    Fix it by having both callers declare the keystream as a 'u32' array.
    For now this is preferable to switching over to the unaligned access
    macros because chacha20_block() is only being used in cases where we can
    easily control the alignment (stack buffers).
    Signed-off-by: default avatarEric Biggers <ebiggers@google.com>
    Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
chacha20_generic.c 3.53 KB