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
