[PATCH 19/36] Bluetooth: SMP: Use new AES library API
From: Eric Biggers <ebiggers@kernel.org>
Date: 2026-01-05 05:15:03
Also in:
linux-arm-kernel, linux-crypto, linux-riscv, linux-s390, lkml, sparclinux
Subsystem:
bluetooth subsystem, the rest · Maintainers:
Marcel Holtmann, Luiz Augusto von Dentz, Linus Torvalds
Switch from the old AES library functions (which use struct crypto_aes_ctx) to the new ones (which use struct aes_enckey). This eliminates the unnecessary computation and caching of the decryption round keys. The new AES en/decryption functions are also much faster and use AES instructions when supported by the CPU. Note: aes_encrypt_new() will be renamed to aes_encrypt() once all callers of the old aes_encrypt() have been updated. Signed-off-by: Eric Biggers <ebiggers@kernel.org> --- net/bluetooth/smp.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c
index 3a1ce04a7a53..69007e510177 100644
--- a/net/bluetooth/smp.c
+++ b/net/bluetooth/smp.c@@ -372,36 +372,36 @@ static int smp_h7(struct crypto_shash *tfm_cmac, const u8 w[16], * s1 and ah. */ static int smp_e(const u8 *k, u8 *r) { - struct crypto_aes_ctx ctx; + struct aes_enckey aes; uint8_t tmp[16], data[16]; int err; SMP_DBG("k %16phN r %16phN", k, r); /* The most significant octet of key corresponds to k[0] */ swap_buf(k, tmp, 16); - err = aes_expandkey(&ctx, tmp, 16); + err = aes_prepareenckey(&aes, tmp, 16); if (err) { BT_ERR("cipher setkey failed: %d", err); return err; } /* Most significant octet of plaintextData corresponds to data[0] */ swap_buf(r, data, 16); - aes_encrypt(&ctx, data, data); + aes_encrypt_new(&aes, data, data); /* Most significant octet of encryptedData corresponds to data[0] */ swap_buf(data, r, 16); SMP_DBG("r %16phN", r); - memzero_explicit(&ctx, sizeof(ctx)); + memzero_explicit(&aes, sizeof(aes)); return err; } static int smp_c1(const u8 k[16], const u8 r[16], const u8 preq[7], const u8 pres[7], u8 _iat,
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2.52.0