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| author | Roman Smirnov <r.smirnov@omp.ru> | 2024-04-01 15:16:23 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2024-04-12 10:07:51 +0300 |
| commit | 233e750592921c26d48bc8440bfe8b2334852eb0 (patch) | |
| tree | a8ec14bac6285ec20c52af6b6d4556359183cdf8 /crypto | |
| parent | 4ad27a8be9dbefd4820da0f60da879d512b2f659 (diff) | |
| download | linux-233e750592921c26d48bc8440bfe8b2334852eb0.tar.xz | |
crypto: ecc - remove checks in crypto_ecdh_shared_secret() and ecc_make_pub_key()
With the current state of the code, ecc_get_curve() cannot return
NULL in crypto_ecdh_shared_secret() and ecc_make_pub_key(). This is
conditioned by the fact that they are only called from ecdh_compute_value(),
which implements the kpp_alg::{generate_public_key,compute_shared_secret}()
methods. Also ecdh implements the kpp_alg::init() method, which is called
before the other methods and sets ecdh_ctx::curve_id to a valid value.
Signed-off-by: Roman Smirnov <r.smirnov@omp.ru>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/ecc.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/crypto/ecc.c b/crypto/ecc.c index 3581027e9f92..7c960e0d8e43 100644 --- a/crypto/ecc.c +++ b/crypto/ecc.c @@ -1520,7 +1520,7 @@ int ecc_make_pub_key(unsigned int curve_id, unsigned int ndigits, u64 priv[ECC_MAX_DIGITS]; const struct ecc_curve *curve = ecc_get_curve(curve_id); - if (!private_key || !curve || ndigits > ARRAY_SIZE(priv)) { + if (!private_key || ndigits > ARRAY_SIZE(priv)) { ret = -EINVAL; goto out; } @@ -1622,7 +1622,7 @@ int crypto_ecdh_shared_secret(unsigned int curve_id, unsigned int ndigits, unsigned int nbytes; const struct ecc_curve *curve = ecc_get_curve(curve_id); - if (!private_key || !public_key || !curve || + if (!private_key || !public_key || ndigits > ARRAY_SIZE(priv) || ndigits > ARRAY_SIZE(rand_z)) { ret = -EINVAL; goto out; |