linux-kernel - [PATCH v8 3/9] crypto: atmel-ecc - move curve_id of ECDH from the key to algorithm name

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Date:   Mon, 8 Feb 2021 17:38:51 +0800
From:   Meng Yu <yumeng18@...wei.com>
To:     <herbert@...dor.apana.org.au>, <davem@...emloft.net>,
        <marcel@...tmann.org>, <johan.hedberg@...il.com>,
        <luiz.dentz@...il.com>, <tudor.ambarus@...rochip.com>
CC:     <linux-crypto@...r.kernel.org>, <xuzaibo@...wei.com>,
        <wangzhou1@...ilicon.com>, <yumeng18@...wei.com>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH v8 3/9] crypto: atmel-ecc - move curve_id of ECDH from the key to algorithm name

As curve id of ECDH will be moved from its key into algorithm name,
we cannot use 'curve_id' in 'struct ecdh', so we should modify ECDH
driver in atmel, and make ECDH algorithm name be the same as crypto
(like 'ecdh-nist-pxxx');

Signed-off-by: Meng Yu <yumeng18@...wei.com>
Reviewed-by: Zaibo Xu <xuzaibo@...wei.com>
---
 drivers/crypto/atmel-ecc.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/crypto/atmel-ecc.c b/drivers/crypto/atmel-ecc.c
index 9bd8e51..9ade6ad 100644
--- a/drivers/crypto/atmel-ecc.c
+++ b/drivers/crypto/atmel-ecc.c
@@ -104,7 +104,7 @@ static int atmel_ecdh_set_secret(struct crypto_kpp *tfm, const void *buf,
 		return -EINVAL;
 	}
 
-	ctx->n_sz = atmel_ecdh_supported_curve(params.curve_id);
+	ctx->n_sz = atmel_ecdh_supported_curve(ctx->curve_id);
 	if (!ctx->n_sz || params.key_size) {
 		/* fallback to ecdh software implementation */
 		ctx->do_fallback = true;
@@ -125,7 +125,6 @@ static int atmel_ecdh_set_secret(struct crypto_kpp *tfm, const void *buf,
 		goto free_cmd;
 
 	ctx->do_fallback = false;
-	ctx->curve_id = params.curve_id;
 
 	atmel_i2c_init_genkey_cmd(cmd, DATA_SLOT_2);
 
@@ -263,6 +262,7 @@ static int atmel_ecdh_init_tfm(struct crypto_kpp *tfm)
 	struct crypto_kpp *fallback;
 	struct atmel_ecdh_ctx *ctx = kpp_tfm_ctx(tfm);
 
+	ctx->curve_id = ECC_CURVE_NIST_P256;
 	ctx->client = atmel_ecc_i2c_client_alloc();
 	if (IS_ERR(ctx->client)) {
 		pr_err("tfm - i2c_client binding failed\n");
@@ -306,7 +306,7 @@ static unsigned int atmel_ecdh_max_size(struct crypto_kpp *tfm)
 	return ATMEL_ECC_PUBKEY_SIZE;
 }
 
-static struct kpp_alg atmel_ecdh = {
+static struct kpp_alg atmel_ecdh_nist_p256 = {
 	.set_secret = atmel_ecdh_set_secret,
 	.generate_public_key = atmel_ecdh_generate_public_key,
 	.compute_shared_secret = atmel_ecdh_compute_shared_secret,
@@ -315,7 +315,7 @@ static struct kpp_alg atmel_ecdh = {
 	.max_size = atmel_ecdh_max_size,
 	.base = {
 		.cra_flags = CRYPTO_ALG_NEED_FALLBACK,
-		.cra_name = "ecdh",
+		.cra_name = "ecdh-nist-p256",
 		.cra_driver_name = "atmel-ecdh",
 		.cra_priority = ATMEL_ECC_PRIORITY,
 		.cra_module = THIS_MODULE,
@@ -340,14 +340,14 @@ static int atmel_ecc_probe(struct i2c_client *client,
 		      &driver_data.i2c_client_list);
 	spin_unlock(&driver_data.i2c_list_lock);
 
-	ret = crypto_register_kpp(&atmel_ecdh);
+	ret = crypto_register_kpp(&atmel_ecdh_nist_p256);
 	if (ret) {
 		spin_lock(&driver_data.i2c_list_lock);
 		list_del(&i2c_priv->i2c_client_list_node);
 		spin_unlock(&driver_data.i2c_list_lock);
 
 		dev_err(&client->dev, "%s alg registration failed\n",
-			atmel_ecdh.base.cra_driver_name);
+			atmel_ecdh_nist_p256.base.cra_driver_name);
 	} else {
 		dev_info(&client->dev, "atmel ecc algorithms registered in /proc/crypto\n");
 	}
@@ -365,7 +365,7 @@ static int atmel_ecc_remove(struct i2c_client *client)
 		return -EBUSY;
 	}
 
-	crypto_unregister_kpp(&atmel_ecdh);
+	crypto_unregister_kpp(&atmel_ecdh_nist_p256);
 
 	spin_lock(&driver_data.i2c_list_lock);
 	list_del(&i2c_priv->i2c_client_list_node);
-- 
2.8.1