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Bluetooth: move ecdh allocation outside of ecdh_helper

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Before this change, a new crypto tfm was allocated, each time,
for both key generation and shared secret computation.

Allocate a single tfm for both cases.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Tudor Ambarus
2017-09-28 17:14:51 +03:00
committed by Marcel Holtmann
parent 24a3a32a99
commit 47eb2ac809
4 changed files with 87 additions and 50 deletions
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32
net/bluetooth/ecdh_helper.c
View File

@@ -23,7 +23,6 @@
#include "ecdh_helper.h"
#include <linux/scatterlist.h>
#include <crypto/kpp.h>
#include <crypto/ecdh.h>
struct ecdh_completion {
@@ -50,10 +49,9 @@ static inline void swap_digits(u64 *in, u64 *out, unsigned int ndigits)
out[i] = __swab64(in[ndigits - 1 - i]);
}
bool compute_ecdh_secret(const u8 public_key[64], const u8 private_key[32],
u8 secret[32])
bool compute_ecdh_secret(struct crypto_kpp *tfm, const u8 public_key[64],
const u8 private_key[32], u8 secret[32])
{
struct crypto_kpp *tfm;
struct kpp_request *req;
struct ecdh p;
struct ecdh_completion result;
@@ -66,16 +64,9 @@ bool compute_ecdh_secret(const u8 public_key[64], const u8 private_key[32],
if (!tmp)
return false;
tfm = crypto_alloc_kpp("ecdh", CRYPTO_ALG_INTERNAL, 0);
if (IS_ERR(tfm)) {
pr_err("alg: kpp: Failed to load tfm for kpp: %ld\n",
PTR_ERR(tfm));
goto free_tmp;
}
req = kpp_request_alloc(tfm, GFP_KERNEL);
if (!req)
goto free_kpp;
goto free_tmp;
init_completion(&result.completion);
@@ -126,16 +117,14 @@ free_all:
kzfree(buf);
free_req:
kpp_request_free(req);
free_kpp:
crypto_free_kpp(tfm);
free_tmp:
kfree(tmp);
return (err == 0);
}
bool generate_ecdh_keys(u8 public_key[64], u8 private_key[32])
bool generate_ecdh_keys(struct crypto_kpp *tfm, u8 public_key[64],
u8 private_key[32])
{
struct crypto_kpp *tfm;
struct kpp_request *req;
struct ecdh p;
struct ecdh_completion result;
@@ -150,16 +139,9 @@ bool generate_ecdh_keys(u8 public_key[64], u8 private_key[32])
if (!tmp)
return false;
tfm = crypto_alloc_kpp("ecdh", CRYPTO_ALG_INTERNAL, 0);
if (IS_ERR(tfm)) {
pr_err("alg: kpp: Failed to load tfm for kpp: %ld\n",
PTR_ERR(tfm));
goto free_tmp;
}
req = kpp_request_alloc(tfm, GFP_KERNEL);
if (!req)
goto free_kpp;
goto free_tmp;
init_completion(&result.completion);
@@ -218,8 +200,6 @@ free_all:
kzfree(buf);
free_req:
kpp_request_free(req);
free_kpp:
crypto_free_kpp(tfm);
free_tmp:
kfree(tmp);
return (err == 0);