On Sun, Feb 02, 2025 at 08:00:50PM +0100, Lukas Wunner wrote: > For ecdsa, KEYCTL_PKEY_QUERY reports nonsensical values for > enc/dec size and (for P521 keys) also the key size. > Second attempt at fixing them. > > Changes v1 -> v2: > > * New patch [2/4] to introduce DIV_ROUND_UP_POW2(), which avoids > integer overflows that may occur with DIV_ROUND_UP() (Herbert) > > * Amend patch [4/4] to use DIV_ROUND_UP_POW2() (Herbert) > > * Amend patch [4/4] to use BITS_PER_BYTE for clarity > > Link to v1: > > https://lore.kernel.org/r/cover.1735236227.git.lukas@xxxxxxxxx > > Lukas Wunner (4): > crypto: sig - Prepare for algorithms with variable signature size > crypto: ecdsa - Harden against integer overflows in DIV_ROUND_UP() > crypto: ecdsa - Fix enc/dec size reported by KEYCTL_PKEY_QUERY > crypto: ecdsa - Fix NIST P521 key size reported by KEYCTL_PKEY_QUERY > > crypto/asymmetric_keys/public_key.c | 22 +++++++++++----------- > crypto/ecc.c | 2 +- > crypto/ecdsa-p1363.c | 8 +++++--- > crypto/ecdsa-x962.c | 7 ++++--- > crypto/ecdsa.c | 2 +- > crypto/ecrdsa.c | 2 +- > crypto/rsassa-pkcs1.c | 4 ++-- > crypto/sig.c | 9 +++++++-- > crypto/testmgr.c | 7 ++++--- > include/crypto/sig.h | 7 ++++--- > include/linux/math.h | 12 ++++++++++++ > 11 files changed, 52 insertions(+), 30 deletions(-) > > -- > 2.43.0 Patches 1-2 applied. Thanks. -- Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
