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| author | Eric Biggers <ebiggers@google.com> | 2019-01-31 23:51:37 -0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-02-08 15:30:08 +0800 |
| commit | 036de26fb4e9c8be0d93ddaa985db5b680f502a3 (patch) | |
| tree | 709099d0be0762ace714fee72501716f3b27349e /crypto | |
| parent | d23089c20adddd2d3ba409198719493695d56096 (diff) | |
| download | linux-crypto-036de26fb4e9c8be0d93ddaa985db5b680f502a3.tar.gz linux-crypto-036de26fb4e9c8be0d93ddaa985db5b680f502a3.zip | |
crypto: morus - fix handling chunked inputs
The generic MORUS implementations all fail the improved AEAD tests
because they produce the wrong result with some data layouts. The issue
is that they assume that if the skcipher_walk API gives 'nbytes' not
aligned to the walksize (a.k.a. walk.stride), then it is the end of the
data. In fact, this can happen before the end. Fix them.
Fixes: 4cc215a8b72d ("crypto: morus - Add generic MORUS AEAD implementations")
Cc: <stable@vger.kernel.org> # v4.18+
Cc: Ondrej Mosnacek <omosnace@redhat.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Ondrej Mosnacek <omosnace@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/morus1280.c | 13 | ||||
| -rw-r--r-- | crypto/morus640.c | 13 |
2 files changed, 14 insertions, 12 deletions
diff --git a/crypto/morus1280.c b/crypto/morus1280.c index 78ba09db..0747732d 100644 --- a/crypto/morus1280.c +++ b/crypto/morus1280.c @@ -362,18 +362,19 @@ static void crypto_morus1280_process_crypt(struct morus1280_state *state, const struct morus1280_ops *ops) { struct skcipher_walk walk; - u8 *dst; - const u8 *src; ops->skcipher_walk_init(&walk, req, false); while (walk.nbytes) { - src = walk.src.virt.addr; - dst = walk.dst.virt.addr; + unsigned int nbytes = walk.nbytes; - ops->crypt_chunk(state, dst, src, walk.nbytes); + if (nbytes < walk.total) + nbytes = round_down(nbytes, walk.stride); - skcipher_walk_done(&walk, 0); + ops->crypt_chunk(state, walk.dst.virt.addr, walk.src.virt.addr, + nbytes); + + skcipher_walk_done(&walk, walk.nbytes - nbytes); } } diff --git a/crypto/morus640.c b/crypto/morus640.c index 5cf53013..1617a1eb 100644 --- a/crypto/morus640.c +++ b/crypto/morus640.c @@ -361,18 +361,19 @@ static void crypto_morus640_process_crypt(struct morus640_state *state, const struct morus640_ops *ops) { struct skcipher_walk walk; - u8 *dst; - const u8 *src; ops->skcipher_walk_init(&walk, req, false); while (walk.nbytes) { - src = walk.src.virt.addr; - dst = walk.dst.virt.addr; + unsigned int nbytes = walk.nbytes; - ops->crypt_chunk(state, dst, src, walk.nbytes); + if (nbytes < walk.total) + nbytes = round_down(nbytes, walk.stride); - skcipher_walk_done(&walk, 0); + ops->crypt_chunk(state, walk.dst.virt.addr, walk.src.virt.addr, + nbytes); + + skcipher_walk_done(&walk, walk.nbytes - nbytes); } } |