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author | Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> | 2018-04-24 16:52:52 +0200 |
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committer | Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> | 2018-04-24 16:52:52 +0200 |
commit | aeb235fbdded8149156360a2b2f9ca2c6d99448e (patch) | |
tree | 0e1e553795532dc0bb4f5bb5a3ac4d7cf98bbba6 /crypto/ecc.c | |
parent | 249b6bae56fc18f4512fe5bc085f71cc235c0735 (diff) | |
parent | 23d6bea047b81c3165a5a34871197d4024936d4c (diff) | |
download | linux-crypto-aeb235fbdded8149156360a2b2f9ca2c6d99448e.tar.gz linux-crypto-aeb235fbdded8149156360a2b2f9ca2c6d99448e.zip |
Merge tag 'v4.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into fbdev-for-next
Linux 4.17-rc2
Diffstat (limited to '')
-rw-r--r-- | crypto/ecc.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/crypto/ecc.c b/crypto/ecc.c index 18f32f2a..9c066b5a 100644 --- a/crypto/ecc.c +++ b/crypto/ecc.c @@ -1025,9 +1025,7 @@ int crypto_ecdh_shared_secret(unsigned int curve_id, unsigned int ndigits, { int ret = 0; struct ecc_point *product, *pk; - u64 priv[ndigits]; - u64 rand_z[ndigits]; - unsigned int nbytes; + u64 *priv, *rand_z; const struct ecc_curve *curve = ecc_get_curve(curve_id); if (!private_key || !public_key || !curve) { @@ -1035,14 +1033,22 @@ int crypto_ecdh_shared_secret(unsigned int curve_id, unsigned int ndigits, goto out; } - nbytes = ndigits << ECC_DIGITS_TO_BYTES_SHIFT; + priv = kmalloc_array(ndigits, sizeof(*priv), GFP_KERNEL); + if (!priv) { + ret = -ENOMEM; + goto out; + } - get_random_bytes(rand_z, nbytes); + rand_z = kmalloc_array(ndigits, sizeof(*rand_z), GFP_KERNEL); + if (!rand_z) { + ret = -ENOMEM; + goto kfree_out; + } pk = ecc_alloc_point(ndigits); if (!pk) { ret = -ENOMEM; - goto out; + goto kfree_out; } product = ecc_alloc_point(ndigits); @@ -1051,6 +1057,8 @@ int crypto_ecdh_shared_secret(unsigned int curve_id, unsigned int ndigits, goto err_alloc_product; } + get_random_bytes(rand_z, ndigits << ECC_DIGITS_TO_BYTES_SHIFT); + ecc_swap_digits(public_key, pk->x, ndigits); ecc_swap_digits(&public_key[ndigits], pk->y, ndigits); ecc_swap_digits(private_key, priv, ndigits); @@ -1065,6 +1073,9 @@ int crypto_ecdh_shared_secret(unsigned int curve_id, unsigned int ndigits, ecc_free_point(product); err_alloc_product: ecc_free_point(pk); +kfree_out: + kzfree(priv); + kzfree(rand_z); out: return ret; } |