[net] octeontx2-pf: mcs: Generate hash key using ecb(aes)
Commit Message
Hardware generated encryption and ICV tags are found to
be wrong when tested with IEEE MACSEC test vectors.
This is because as per the HRM, the hash key (derived by
AES-ECB block encryption of an all 0s block with the SAK)
has to be programmed by the software in
MCSX_RS_MCS_CPM_TX_SLAVE_SA_PLCY_MEM_4X register.
Hence fix this by generating hash key in software and
configuring in hardware.
Fixes: c54ffc73601c ("octeontx2-pf: mcs: Introduce MACSEC hardware offloading")
Signed-off-by: Subbaraya Sundeep <sbhatta@marvell.com>
---
.../ethernet/marvell/octeontx2/nic/cn10k_macsec.c | 132 +++++++++++++++------
1 file changed, 95 insertions(+), 37 deletions(-)
Comments
Hi,
>From: Kalesh Anakkur Purayil <kalesh-anakkur.purayil@broadcom.com>
>Sent: Sunday, July 16, 2023 4:20 PM
>To: Subbaraya Sundeep Bhatta <sbhatta@marvell.com>
>Cc: netdev@vger.kernel.org; linux-kernel@vger.kernel.org; kuba@kernel.org;
>davem@davemloft.net; edumazet@google.com; pabeni@redhat.com; Sunil
>Kovvuri Goutham <sgoutham@marvell.com>; Geethasowjanya Akula
><gakula@marvell.com>; Hariprasad Kelam <hkelam@marvell.com>; Naveen
>Mamindlapalli <naveenm@marvell.com>
>Subject: Re: [net PATCH] octeontx2-pf: mcs: Generate hash key using ecb(aes)
>
>
>On Fri, Jul 14, 2023 at 9:53 PM Subbaraya Sundeep
><mailto:sbhatta@marvell.com> wrote:
>Hardware generated encryption and ICV tags are found to
>be wrong when tested with IEEE MACSEC test vectors.
>This is because as per the HRM, the hash key (derived by
>AES-ECB block encryption of an all 0s block with the SAK)
>has to be programmed by the software in
>MCSX_RS_MCS_CPM_TX_SLAVE_SA_PLCY_MEM_4X register.
>Hence fix this by generating hash key in software and
>configuring in hardware.
>
>Fixes: c54ffc73601c ("octeontx2-pf: mcs: Introduce MACSEC hardware
>offloading")
>Signed-off-by: Subbaraya Sundeep <mailto:sbhatta@marvell.com>
>---
> .../ethernet/marvell/octeontx2/nic/cn10k_macsec.c | 132 +++++++++++++++---
>---
> 1 file changed, 95 insertions(+), 37 deletions(-)
>
>diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/cn10k_macsec.c
>b/drivers/net/ethernet/marvell/octeontx2/nic/cn10k_macsec.c
>index 6e2fb24..9f23118 100644
>--- a/drivers/net/ethernet/marvell/octeontx2/nic/cn10k_macsec.c
>+++ b/drivers/net/ethernet/marvell/octeontx2/nic/cn10k_macsec.c
>@@ -4,6 +4,7 @@
> * Copyright (C) 2022 Marvell.
> */
>
>+#include <crypto/skcipher.h>
> #include <linux/rtnetlink.h>
> #include <linux/bitfield.h>
> #include "otx2_common.h"
>@@ -42,6 +43,51 @@
> #define MCS_TCI_E 0x08 /* encryption */
> #define MCS_TCI_C 0x04 /* changed text */
>
>+#define CN10K_MAX_HASH_LEN 16
>+#define CN10K_MAX_SAK_LEN 32
>+
>+static int cn10k_ecb_aes_encrypt(struct otx2_nic *pfvf, u8 *sak,
>+ u16 sak_len, u8 *hash)
>+{
>+ u8 data[CN10K_MAX_HASH_LEN] = { 0 };
>[Kalesh]: There is no need in 0 here, just use {}
>
Input has to be all zeroes. AES-ECB block encryption of an all 0s block with the SAK key.
Hence needed.
>+ struct skcipher_request *req = NULL;
>+ struct scatterlist sg_src, sg_dst;
>+ struct crypto_skcipher *tfm;
>+ DECLARE_CRYPTO_WAIT(wait);
>+ int err;
>+
>+ tfm = crypto_alloc_skcipher("ecb(aes)", 0, 0);
>+ if (IS_ERR(tfm)) {
>+ dev_err(pfvf->dev, "failed to allocate transform for ecb-aes\n");
>+ return PTR_ERR(tfm);
>+ }
>+
>+ req = skcipher_request_alloc(tfm, GFP_KERNEL);
>+ if (!req) {
>+ dev_err(pfvf->dev, "failed to allocate request for skcipher\n");
>+ err = -ENOMEM;
>+ goto out;
>+ }
>+
>+ err = crypto_skcipher_setkey(tfm, sak, sak_len);
>[Kalesh]: No need for a return value check here?
Missed it. Will add.
>+
>+ /* build sg list */
>+ sg_init_one(&sg_src, data, CN10K_MAX_HASH_LEN);
>+ sg_init_one(&sg_dst, hash, CN10K_MAX_HASH_LEN);
>+
>+ skcipher_request_set_callback(req, 0, crypto_req_done, &wait);
>+ skcipher_request_set_crypt(req, &sg_src, &sg_dst,
>+ CN10K_MAX_HASH_LEN, NULL);
>+
>+ err = crypto_skcipher_encrypt(req);
>+ err = crypto_wait_req(err, &wait);
>+
>+out:
>+ skcipher_request_free(req);
>[Kalesh]: I think you should move the label here.
No. After adding the new check, label must be above only.
>+ crypto_free_skcipher(tfm);
>+ return err;
>+}
>+
> static struct cn10k_mcs_txsc *cn10k_mcs_get_txsc(struct cn10k_mcs_cfg *cfg,
> struct macsec_secy *secy)
> {
>@@ -330,19 +376,53 @@ static int cn10k_mcs_write_sc_cam(struct otx2_nic
>*pfvf,
> return ret;
> }
>
>+static int cn10k_mcs_write_keys(struct otx2_nic *pfvf,
>+ struct macsec_secy *secy,
>+ struct mcs_sa_plcy_write_req *req,
>+ u8 *sak, u8 *salt, ssci_t ssci)
>+{
>+ u8 hash_rev[CN10K_MAX_HASH_LEN] = { 0 };
>[Kalesh]: There is no need in 0 here, just use {}
>
Okay
Thanks,
Sundeep
>+ u8 sak_rev[CN10K_MAX_SAK_LEN] = { 0 };
>+ u8 salt_rev[MACSEC_SALT_LEN] = { 0 };
>+ u8 hash[CN10K_MAX_HASH_LEN] = { 0 };
>+ u32 ssci_63_32;
>+ int err, i;
>+
>+ err = cn10k_ecb_aes_encrypt(pfvf, sak, secy->key_len, hash);
>+ if (err) {
>+ dev_err(pfvf->dev, "Generating hash using ECB(AES) failed\n");
>+ return err;
>+ }
>+
>+ for (i = 0; i < secy->key_len; i++)
>+ sak_rev[i] = sak[secy->key_len - 1 - i];
>+
>+ for (i = 0; i < CN10K_MAX_HASH_LEN; i++)
>+ hash_rev[i] = hash[CN10K_MAX_HASH_LEN - 1 - i];
>+
>+ for (i = 0; i < MACSEC_SALT_LEN; i++)
>+ salt_rev[i] = salt[MACSEC_SALT_LEN - 1 - i];
>+
>+ ssci_63_32 = (__force u32)cpu_to_be32((__force u32)ssci);
>+
>+ memcpy(&req->plcy[0][0], sak_rev, secy->key_len);
>+ memcpy(&req->plcy[0][4], hash_rev, CN10K_MAX_HASH_LEN);
>+ memcpy(&req->plcy[0][6], salt_rev, MACSEC_SALT_LEN);
>+ req->plcy[0][7] |= (u64)ssci_63_32 << 32;
>+
>+ return 0;
>+}
>+
> static int cn10k_mcs_write_rx_sa_plcy(struct otx2_nic *pfvf,
> struct macsec_secy *secy,
> struct cn10k_mcs_rxsc *rxsc,
> u8 assoc_num, bool sa_in_use)
> {
>- unsigned char *src = rxsc->sa_key[assoc_num];
> struct mcs_sa_plcy_write_req *plcy_req;
>- u8 *salt_p = rxsc->salt[assoc_num];
>+ u8 *sak = rxsc->sa_key[assoc_num];
>+ u8 *salt = rxsc->salt[assoc_num];
> struct mcs_rx_sc_sa_map *map_req;
> struct mbox *mbox = &pfvf->mbox;
>- u64 ssci_salt_95_64 = 0;
>- u8 reg, key_len;
>- u64 salt_63_0;
> int ret;
>
> mutex_lock(&mbox->lock);
>@@ -360,20 +440,10 @@ static int cn10k_mcs_write_rx_sa_plcy(struct otx2_nic
>*pfvf,
> goto fail;
> }
>
>- for (reg = 0, key_len = 0; key_len < secy->key_len; key_len += 8) {
>- memcpy((u8 *)&plcy_req->plcy[0][reg],
>- (src + reg * 8), 8);
>- reg++;
>- }
>-
>- if (secy->xpn) {
>- memcpy((u8 *)&salt_63_0, salt_p, 8);
>- memcpy((u8 *)&ssci_salt_95_64, salt_p + 8, 4);
>- ssci_salt_95_64 |= (__force u64)rxsc->ssci[assoc_num] << 32;
>-
>- plcy_req->plcy[0][6] = salt_63_0;
>- plcy_req->plcy[0][7] = ssci_salt_95_64;
>- }
>+ ret = cn10k_mcs_write_keys(pfvf, secy, plcy_req, sak,
>+ salt, rxsc->ssci[assoc_num]);
>+ if (ret)
>+ goto fail;
>
> plcy_req->sa_index[0] = rxsc->hw_sa_id[assoc_num];
> plcy_req->sa_cnt = 1;
>@@ -586,13 +656,10 @@ static int cn10k_mcs_write_tx_sa_plcy(struct otx2_nic
>*pfvf,
> struct cn10k_mcs_txsc *txsc,
> u8 assoc_num)
> {
>- unsigned char *src = txsc->sa_key[assoc_num];
> struct mcs_sa_plcy_write_req *plcy_req;
>- u8 *salt_p = txsc->salt[assoc_num];
>+ u8 *sak = txsc->sa_key[assoc_num];
>+ u8 *salt = txsc->salt[assoc_num];
> struct mbox *mbox = &pfvf->mbox;
>- u64 ssci_salt_95_64 = 0;
>- u8 reg, key_len;
>- u64 salt_63_0;
> int ret;
>
> mutex_lock(&mbox->lock);
>@@ -603,19 +670,10 @@ static int cn10k_mcs_write_tx_sa_plcy(struct otx2_nic
>*pfvf,
> goto fail;
> }
>
>- for (reg = 0, key_len = 0; key_len < secy->key_len; key_len += 8) {
>- memcpy((u8 *)&plcy_req->plcy[0][reg], (src + reg * 8), 8);
>- reg++;
>- }
>-
>- if (secy->xpn) {
>- memcpy((u8 *)&salt_63_0, salt_p, 8);
>- memcpy((u8 *)&ssci_salt_95_64, salt_p + 8, 4);
>- ssci_salt_95_64 |= (__force u64)txsc->ssci[assoc_num] << 32;
>-
>- plcy_req->plcy[0][6] = salt_63_0;
>- plcy_req->plcy[0][7] = ssci_salt_95_64;
>- }
>+ ret = cn10k_mcs_write_keys(pfvf, secy, plcy_req, sak,
>+ salt, txsc->ssci[assoc_num]);
>+ if (ret)
>+ goto fail;
>
> plcy_req->plcy[0][8] = assoc_num;
> plcy_req->sa_index[0] = txsc->hw_sa_id[assoc_num];
>--
>2.7.4
>
>
>
>
>--
>Regards,
>Kalesh A P
Hi,
>From: Kalesh Anakkur Purayil <mailto:kalesh-anakkur.purayil@broadcom.com>
>Sent: Monday, July 17, 2023 10:50 AM
>To: Subbaraya Sundeep Bhatta <mailto:sbhatta@marvell.com>
>Cc: mailto:netdev@vger.kernel.org; mailto:linux-kernel@vger.kernel.org;
>mailto:kuba@kernel.org; mailto:davem@davemloft.net;
>mailto:edumazet@google.com; mailto:pabeni@redhat.com; Sunil Kovvuri
>Goutham <mailto:sgoutham@marvell.com>; Geethasowjanya Akula
><mailto:gakula@marvell.com>; Hariprasad Kelam
><mailto:hkelam@marvell.com>; Naveen Mamindlapalli
><mailto:naveenm@marvell.com>
>Subject: Re: [net PATCH] octeontx2-pf: mcs: Generate hash key using ecb(aes)
>
>
>
>On Mon, Jul 17, 2023 at 10:20 AM Subbaraya Sundeep Bhatta
><mailto:sbhatta@marvell.com> wrote:
>Hi,
>
>>From: Kalesh Anakkur Purayil <mailto:kalesh-anakkur.purayil@broadcom.com>
>>Sent: Sunday, July 16, 2023 4:20 PM
>>To: Subbaraya Sundeep Bhatta <mailto:sbhatta@marvell.com>
>>Cc: mailto:netdev@vger.kernel.org; mailto:linux-kernel@vger.kernel.org;
>mailto:kuba@kernel.org;
>>mailto:davem@davemloft.net; mailto:edumazet@google.com;
>mailto:pabeni@redhat.com; Sunil
>>Kovvuri Goutham <mailto:sgoutham@marvell.com>; Geethasowjanya Akula
>><mailto:gakula@marvell.com>; Hariprasad Kelam
><mailto:hkelam@marvell.com>; Naveen
>>Mamindlapalli <mailto:naveenm@marvell.com>
>>Subject: Re: [net PATCH] octeontx2-pf: mcs: Generate hash key using ecb(aes)
>>
>>
>>On Fri, Jul 14, 2023 at 9:53 PM Subbaraya Sundeep
>><mailto:mailto:sbhatta@marvell.com> wrote:
>>Hardware generated encryption and ICV tags are found to
>>be wrong when tested with IEEE MACSEC test vectors.
>>This is because as per the HRM, the hash key (derived by
>>AES-ECB block encryption of an all 0s block with the SAK)
>>has to be programmed by the software in
>>MCSX_RS_MCS_CPM_TX_SLAVE_SA_PLCY_MEM_4X register.
>>Hence fix this by generating hash key in software and
>>configuring in hardware.
>>
>>Fixes: c54ffc73601c ("octeontx2-pf: mcs: Introduce MACSEC hardware
>>offloading")
>>Signed-off-by: Subbaraya Sundeep <mailto:mailto:sbhatta@marvell.com>
>>---
>> .../ethernet/marvell/octeontx2/nic/cn10k_macsec.c | 132 +++++++++++++++--
>-
>>---
>> 1 file changed, 95 insertions(+), 37 deletions(-)
>>
>>diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/cn10k_macsec.c
>>b/drivers/net/ethernet/marvell/octeontx2/nic/cn10k_macsec.c
>>index 6e2fb24..9f23118 100644
>>--- a/drivers/net/ethernet/marvell/octeontx2/nic/cn10k_macsec.c
>>+++ b/drivers/net/ethernet/marvell/octeontx2/nic/cn10k_macsec.c
>>@@ -4,6 +4,7 @@
>> * Copyright (C) 2022 Marvell.
>> */
>>
>>+#include <crypto/skcipher.h>
>> #include <linux/rtnetlink.h>
>> #include <linux/bitfield.h>
>> #include "otx2_common.h"
>>@@ -42,6 +43,51 @@
>> #define MCS_TCI_E 0x08 /* encryption */
>> #define MCS_TCI_C 0x04 /* changed text */
>>
>>+#define CN10K_MAX_HASH_LEN 16
>>+#define CN10K_MAX_SAK_LEN 32
>>+
>>+static int cn10k_ecb_aes_encrypt(struct otx2_nic *pfvf, u8 *sak,
>>+ u16 sak_len, u8 *hash)
>>+{
>>+ u8 data[CN10K_MAX_HASH_LEN] = { 0 };
>>[Kalesh]: There is no need in 0 here, just use {}
>>
>Input has to be all zeroes. AES-ECB block encryption of an all 0s block with the
>SAK key.
>Hence needed.
>
>>+ struct skcipher_request *req = NULL;
>>+ struct scatterlist sg_src, sg_dst;
>>+ struct crypto_skcipher *tfm;
>>+ DECLARE_CRYPTO_WAIT(wait);
>>+ int err;
>>+
>>+ tfm = crypto_alloc_skcipher("ecb(aes)", 0, 0);
>>+ if (IS_ERR(tfm)) {
>>+ dev_err(pfvf->dev, "failed to allocate transform for ecb-aes\n");
>>+ return PTR_ERR(tfm);
>>+ }
>>+
>>+ req = skcipher_request_alloc(tfm, GFP_KERNEL);
>>+ if (!req) {
>>+ dev_err(pfvf->dev, "failed to allocate request for skcipher\n");
>>+ err = -ENOMEM;
>>+ goto out;
>>+ }
>>+
>>+ err = crypto_skcipher_setkey(tfm, sak, sak_len);
>>[Kalesh]: No need for a return value check here?
>Missed it. Will add.
>
>>+
>>+ /* build sg list */
>>+ sg_init_one(&sg_src, data, CN10K_MAX_HASH_LEN);
>>+ sg_init_one(&sg_dst, hash, CN10K_MAX_HASH_LEN);
>>+
>>+ skcipher_request_set_callback(req, 0, crypto_req_done, &wait);
>>+ skcipher_request_set_crypt(req, &sg_src, &sg_dst,
>>+ CN10K_MAX_HASH_LEN, NULL);
>>+
>>+ err = crypto_skcipher_encrypt(req);
>>+ err = crypto_wait_req(err, &wait);
>>+
>>+out:
>>+ skcipher_request_free(req);
>>[Kalesh]: I think you should move the label here.
>>
>>No. After adding the new check, label must be above only.
>[Kalesh] Sorry, I did not get that.
>Why to invoke skcipher_request_free() when skcipher_request_alloc() fails? Am I
>missing something here?
>
I avoided another label since we can call skcipher_request_free even input req is NULL.
Anyway will add new label so that it is easier to understand and send v2. Thanks for review.
Sundeep
>>+ crypto_free_skcipher(tfm);
>>+ return err;
>>+}
>>+
>> static struct cn10k_mcs_txsc *cn10k_mcs_get_txsc(struct cn10k_mcs_cfg *cfg,
>> struct macsec_secy *secy)
>> {
>>@@ -330,19 +376,53 @@ static int cn10k_mcs_write_sc_cam(struct otx2_nic
>>*pfvf,
>> return ret;
>> }
>>
>>+static int cn10k_mcs_write_keys(struct otx2_nic *pfvf,
>>+ struct macsec_secy *secy,
>>+ struct mcs_sa_plcy_write_req *req,
>>+ u8 *sak, u8 *salt, ssci_t ssci)
>>+{
>>+ u8 hash_rev[CN10K_MAX_HASH_LEN] = { 0 };
>>[Kalesh]: There is no need in 0 here, just use {}
>>
>Okay
>
>Thanks,
>Sundeep
>
>>+ u8 sak_rev[CN10K_MAX_SAK_LEN] = { 0 };
>>+ u8 salt_rev[MACSEC_SALT_LEN] = { 0 };
>>+ u8 hash[CN10K_MAX_HASH_LEN] = { 0 };
>>+ u32 ssci_63_32;
>>+ int err, i;
>>+
>>+ err = cn10k_ecb_aes_encrypt(pfvf, sak, secy->key_len, hash);
>>+ if (err) {
>>+ dev_err(pfvf->dev, "Generating hash using ECB(AES) failed\n");
>>+ return err;
>>+ }
>>+
>>+ for (i = 0; i < secy->key_len; i++)
>>+ sak_rev[i] = sak[secy->key_len - 1 - i];
>>+
>>+ for (i = 0; i < CN10K_MAX_HASH_LEN; i++)
>>+ hash_rev[i] = hash[CN10K_MAX_HASH_LEN - 1 - i];
>>+
>>+ for (i = 0; i < MACSEC_SALT_LEN; i++)
>>+ salt_rev[i] = salt[MACSEC_SALT_LEN - 1 - i];
>>+
>>+ ssci_63_32 = (__force u32)cpu_to_be32((__force u32)ssci);
>>+
>>+ memcpy(&req->plcy[0][0], sak_rev, secy->key_len);
>>+ memcpy(&req->plcy[0][4], hash_rev, CN10K_MAX_HASH_LEN);
>>+ memcpy(&req->plcy[0][6], salt_rev, MACSEC_SALT_LEN);
>>+ req->plcy[0][7] |= (u64)ssci_63_32 << 32;
>>+
>>+ return 0;
>>+}
>>+
>> static int cn10k_mcs_write_rx_sa_plcy(struct otx2_nic *pfvf,
>> struct macsec_secy *secy,
>> struct cn10k_mcs_rxsc *rxsc,
>> u8 assoc_num, bool sa_in_use)
>> {
>>- unsigned char *src = rxsc->sa_key[assoc_num];
>> struct mcs_sa_plcy_write_req *plcy_req;
>>- u8 *salt_p = rxsc->salt[assoc_num];
>>+ u8 *sak = rxsc->sa_key[assoc_num];
>>+ u8 *salt = rxsc->salt[assoc_num];
>> struct mcs_rx_sc_sa_map *map_req;
>> struct mbox *mbox = &pfvf->mbox;
>>- u64 ssci_salt_95_64 = 0;
>>- u8 reg, key_len;
>>- u64 salt_63_0;
>> int ret;
>>
>> mutex_lock(&mbox->lock);
>>@@ -360,20 +440,10 @@ static int cn10k_mcs_write_rx_sa_plcy(struct
>otx2_nic
>>*pfvf,
>> goto fail;
>> }
>>
>>- for (reg = 0, key_len = 0; key_len < secy->key_len; key_len += 8) {
>>- memcpy((u8 *)&plcy_req->plcy[0][reg],
>>- (src + reg * 8), 8);
>>- reg++;
>>- }
>>-
>>- if (secy->xpn) {
>>- memcpy((u8 *)&salt_63_0, salt_p, 8);
>>- memcpy((u8 *)&ssci_salt_95_64, salt_p + 8, 4);
>>- ssci_salt_95_64 |= (__force u64)rxsc->ssci[assoc_num] << 32;
>>-
>>- plcy_req->plcy[0][6] = salt_63_0;
>>- plcy_req->plcy[0][7] = ssci_salt_95_64;
>>- }
>>+ ret = cn10k_mcs_write_keys(pfvf, secy, plcy_req, sak,
>>+ salt, rxsc->ssci[assoc_num]);
>>+ if (ret)
>>+ goto fail;
>>
>> plcy_req->sa_index[0] = rxsc->hw_sa_id[assoc_num];
>> plcy_req->sa_cnt = 1;
>>@@ -586,13 +656,10 @@ static int cn10k_mcs_write_tx_sa_plcy(struct
>otx2_nic
>>*pfvf,
>> struct cn10k_mcs_txsc *txsc,
>> u8 assoc_num)
>> {
>>- unsigned char *src = txsc->sa_key[assoc_num];
>> struct mcs_sa_plcy_write_req *plcy_req;
>>- u8 *salt_p = txsc->salt[assoc_num];
>>+ u8 *sak = txsc->sa_key[assoc_num];
>>+ u8 *salt = txsc->salt[assoc_num];
>> struct mbox *mbox = &pfvf->mbox;
>>- u64 ssci_salt_95_64 = 0;
>>- u8 reg, key_len;
>>- u64 salt_63_0;
>> int ret;
>>
>> mutex_lock(&mbox->lock);
>>@@ -603,19 +670,10 @@ static int cn10k_mcs_write_tx_sa_plcy(struct
>otx2_nic
>>*pfvf,
>> goto fail;
>> }
>>
>>- for (reg = 0, key_len = 0; key_len < secy->key_len; key_len += 8) {
>>- memcpy((u8 *)&plcy_req->plcy[0][reg], (src + reg * 8), 8);
>>- reg++;
>>- }
>>-
>>- if (secy->xpn) {
>>- memcpy((u8 *)&salt_63_0, salt_p, 8);
>>- memcpy((u8 *)&ssci_salt_95_64, salt_p + 8, 4);
>>- ssci_salt_95_64 |= (__force u64)txsc->ssci[assoc_num] << 32;
>>-
>>- plcy_req->plcy[0][6] = salt_63_0;
>>- plcy_req->plcy[0][7] = ssci_salt_95_64;
>>- }
>>+ ret = cn10k_mcs_write_keys(pfvf, secy, plcy_req, sak,
>>+ salt, txsc->ssci[assoc_num]);
>>+ if (ret)
>>+ goto fail;
>>
>> plcy_req->plcy[0][8] = assoc_num;
>> plcy_req->sa_index[0] = txsc->hw_sa_id[assoc_num];
>>--
>>2.7.4
>>
>>
>>
>>
>>--
>>Regards,
>>Kalesh A P
>
>
>
>--
>Regards,
>Kalesh A P
@@ -4,6 +4,7 @@
* Copyright (C) 2022 Marvell.
*/
+#include <crypto/skcipher.h>
#include <linux/rtnetlink.h>
#include <linux/bitfield.h>
#include "otx2_common.h"
@@ -42,6 +43,51 @@
#define MCS_TCI_E 0x08 /* encryption */
#define MCS_TCI_C 0x04 /* changed text */
+#define CN10K_MAX_HASH_LEN 16
+#define CN10K_MAX_SAK_LEN 32
+
+static int cn10k_ecb_aes_encrypt(struct otx2_nic *pfvf, u8 *sak,
+ u16 sak_len, u8 *hash)
+{
+ u8 data[CN10K_MAX_HASH_LEN] = { 0 };
+ struct skcipher_request *req = NULL;
+ struct scatterlist sg_src, sg_dst;
+ struct crypto_skcipher *tfm;
+ DECLARE_CRYPTO_WAIT(wait);
+ int err;
+
+ tfm = crypto_alloc_skcipher("ecb(aes)", 0, 0);
+ if (IS_ERR(tfm)) {
+ dev_err(pfvf->dev, "failed to allocate transform for ecb-aes\n");
+ return PTR_ERR(tfm);
+ }
+
+ req = skcipher_request_alloc(tfm, GFP_KERNEL);
+ if (!req) {
+ dev_err(pfvf->dev, "failed to allocate request for skcipher\n");
+ err = -ENOMEM;
+ goto out;
+ }
+
+ err = crypto_skcipher_setkey(tfm, sak, sak_len);
+
+ /* build sg list */
+ sg_init_one(&sg_src, data, CN10K_MAX_HASH_LEN);
+ sg_init_one(&sg_dst, hash, CN10K_MAX_HASH_LEN);
+
+ skcipher_request_set_callback(req, 0, crypto_req_done, &wait);
+ skcipher_request_set_crypt(req, &sg_src, &sg_dst,
+ CN10K_MAX_HASH_LEN, NULL);
+
+ err = crypto_skcipher_encrypt(req);
+ err = crypto_wait_req(err, &wait);
+
+out:
+ skcipher_request_free(req);
+ crypto_free_skcipher(tfm);
+ return err;
+}
+
static struct cn10k_mcs_txsc *cn10k_mcs_get_txsc(struct cn10k_mcs_cfg *cfg,
struct macsec_secy *secy)
{
@@ -330,19 +376,53 @@ static int cn10k_mcs_write_sc_cam(struct otx2_nic *pfvf,
return ret;
}
+static int cn10k_mcs_write_keys(struct otx2_nic *pfvf,
+ struct macsec_secy *secy,
+ struct mcs_sa_plcy_write_req *req,
+ u8 *sak, u8 *salt, ssci_t ssci)
+{
+ u8 hash_rev[CN10K_MAX_HASH_LEN] = { 0 };
+ u8 sak_rev[CN10K_MAX_SAK_LEN] = { 0 };
+ u8 salt_rev[MACSEC_SALT_LEN] = { 0 };
+ u8 hash[CN10K_MAX_HASH_LEN] = { 0 };
+ u32 ssci_63_32;
+ int err, i;
+
+ err = cn10k_ecb_aes_encrypt(pfvf, sak, secy->key_len, hash);
+ if (err) {
+ dev_err(pfvf->dev, "Generating hash using ECB(AES) failed\n");
+ return err;
+ }
+
+ for (i = 0; i < secy->key_len; i++)
+ sak_rev[i] = sak[secy->key_len - 1 - i];
+
+ for (i = 0; i < CN10K_MAX_HASH_LEN; i++)
+ hash_rev[i] = hash[CN10K_MAX_HASH_LEN - 1 - i];
+
+ for (i = 0; i < MACSEC_SALT_LEN; i++)
+ salt_rev[i] = salt[MACSEC_SALT_LEN - 1 - i];
+
+ ssci_63_32 = (__force u32)cpu_to_be32((__force u32)ssci);
+
+ memcpy(&req->plcy[0][0], sak_rev, secy->key_len);
+ memcpy(&req->plcy[0][4], hash_rev, CN10K_MAX_HASH_LEN);
+ memcpy(&req->plcy[0][6], salt_rev, MACSEC_SALT_LEN);
+ req->plcy[0][7] |= (u64)ssci_63_32 << 32;
+
+ return 0;
+}
+
static int cn10k_mcs_write_rx_sa_plcy(struct otx2_nic *pfvf,
struct macsec_secy *secy,
struct cn10k_mcs_rxsc *rxsc,
u8 assoc_num, bool sa_in_use)
{
- unsigned char *src = rxsc->sa_key[assoc_num];
struct mcs_sa_plcy_write_req *plcy_req;
- u8 *salt_p = rxsc->salt[assoc_num];
+ u8 *sak = rxsc->sa_key[assoc_num];
+ u8 *salt = rxsc->salt[assoc_num];
struct mcs_rx_sc_sa_map *map_req;
struct mbox *mbox = &pfvf->mbox;
- u64 ssci_salt_95_64 = 0;
- u8 reg, key_len;
- u64 salt_63_0;
int ret;
mutex_lock(&mbox->lock);
@@ -360,20 +440,10 @@ static int cn10k_mcs_write_rx_sa_plcy(struct otx2_nic *pfvf,
goto fail;
}
- for (reg = 0, key_len = 0; key_len < secy->key_len; key_len += 8) {
- memcpy((u8 *)&plcy_req->plcy[0][reg],
- (src + reg * 8), 8);
- reg++;
- }
-
- if (secy->xpn) {
- memcpy((u8 *)&salt_63_0, salt_p, 8);
- memcpy((u8 *)&ssci_salt_95_64, salt_p + 8, 4);
- ssci_salt_95_64 |= (__force u64)rxsc->ssci[assoc_num] << 32;
-
- plcy_req->plcy[0][6] = salt_63_0;
- plcy_req->plcy[0][7] = ssci_salt_95_64;
- }
+ ret = cn10k_mcs_write_keys(pfvf, secy, plcy_req, sak,
+ salt, rxsc->ssci[assoc_num]);
+ if (ret)
+ goto fail;
plcy_req->sa_index[0] = rxsc->hw_sa_id[assoc_num];
plcy_req->sa_cnt = 1;
@@ -586,13 +656,10 @@ static int cn10k_mcs_write_tx_sa_plcy(struct otx2_nic *pfvf,
struct cn10k_mcs_txsc *txsc,
u8 assoc_num)
{
- unsigned char *src = txsc->sa_key[assoc_num];
struct mcs_sa_plcy_write_req *plcy_req;
- u8 *salt_p = txsc->salt[assoc_num];
+ u8 *sak = txsc->sa_key[assoc_num];
+ u8 *salt = txsc->salt[assoc_num];
struct mbox *mbox = &pfvf->mbox;
- u64 ssci_salt_95_64 = 0;
- u8 reg, key_len;
- u64 salt_63_0;
int ret;
mutex_lock(&mbox->lock);
@@ -603,19 +670,10 @@ static int cn10k_mcs_write_tx_sa_plcy(struct otx2_nic *pfvf,
goto fail;
}
- for (reg = 0, key_len = 0; key_len < secy->key_len; key_len += 8) {
- memcpy((u8 *)&plcy_req->plcy[0][reg], (src + reg * 8), 8);
- reg++;
- }
-
- if (secy->xpn) {
- memcpy((u8 *)&salt_63_0, salt_p, 8);
- memcpy((u8 *)&ssci_salt_95_64, salt_p + 8, 4);
- ssci_salt_95_64 |= (__force u64)txsc->ssci[assoc_num] << 32;
-
- plcy_req->plcy[0][6] = salt_63_0;
- plcy_req->plcy[0][7] = ssci_salt_95_64;
- }
+ ret = cn10k_mcs_write_keys(pfvf, secy, plcy_req, sak,
+ salt, txsc->ssci[assoc_num]);
+ if (ret)
+ goto fail;
plcy_req->plcy[0][8] = assoc_num;
plcy_req->sa_index[0] = txsc->hw_sa_id[assoc_num];