[PATCH v2 4/4] mka: add driver op to get macsec capabilities
Sabrina Dubroca
sd at queasysnail.net
Fri Oct 7 03:08:12 PDT 2016
This also implements the macsec_get_capability for the macsec_qca
driver to maintain the same behavior.
Signed-off-by: Sabrina Dubroca <sd at queasysnail.net>
---
v2: remove fallback value for drivers not implementing macsec_get_capability
implement macsec_get_capability in macsec_qca
src/drivers/driver.h | 8 ++++++++
src/drivers/driver_macsec_qca.c | 11 +++++++++++
src/pae/ieee802_1x_kay.c | 18 ++++++++++++++++--
src/pae/ieee802_1x_kay.h | 1 +
src/pae/ieee802_1x_secy_ops.c | 20 ++++++++++++++++++++
src/pae/ieee802_1x_secy_ops.h | 1 +
wpa_supplicant/driver_i.h | 9 +++++++++
wpa_supplicant/wpas_kay.c | 7 +++++++
8 files changed, 73 insertions(+), 2 deletions(-)
diff --git a/src/drivers/driver.h b/src/drivers/driver.h
index b44c78d6b6bb..03fc7253126d 100644
--- a/src/drivers/driver.h
+++ b/src/drivers/driver.h
@@ -3298,6 +3298,14 @@ struct wpa_driver_ops {
int (*macsec_deinit)(void *priv);
/**
+ * macsec_get_capability - Inform MKA of this driver's capability
+ * @priv: Private driver interface data
+ * @cap: Driver's capability
+ * Returns: 0 on success, -1 on failure
+ */
+ int (*macsec_get_capability)(void *priv, enum macsec_cap *cap);
+
+ /**
* enable_protect_frames - Set protect frames status
* @priv: Private driver interface data
* @enabled: TRUE = protect frames enabled
diff --git a/src/drivers/driver_macsec_qca.c b/src/drivers/driver_macsec_qca.c
index b6066dc48b3a..512046e7c883 100644
--- a/src/drivers/driver_macsec_qca.c
+++ b/src/drivers/driver_macsec_qca.c
@@ -465,6 +465,16 @@ static int macsec_qca_macsec_deinit(void *priv)
}
+static int macsec_qca_get_capability(void *priv, enum macsec_cap *cap)
+{
+ wpa_printf(MSG_DEBUG, "%s\n", __func__);
+
+ *cap = MACSEC_CAP_INTEG_AND_CONF_0_30_50;
+
+ return 0;
+}
+
+
static int macsec_qca_enable_protect_frames(void *priv, Boolean enabled)
{
struct macsec_qca_data *drv = priv;
@@ -1007,6 +1017,7 @@ const struct wpa_driver_ops wpa_driver_macsec_qca_ops = {
.macsec_init = macsec_qca_macsec_init,
.macsec_deinit = macsec_qca_macsec_deinit,
+ .macsec_get_capability = macsec_qca_get_capability,
.enable_protect_frames = macsec_qca_enable_protect_frames,
.set_replay_protect = macsec_qca_set_replay_protect,
.set_current_cipher_suite = macsec_qca_set_current_cipher_suite,
diff --git a/src/pae/ieee802_1x_kay.c b/src/pae/ieee802_1x_kay.c
index ce996bd80440..38a829376d63 100644
--- a/src/pae/ieee802_1x_kay.c
+++ b/src/pae/ieee802_1x_kay.c
@@ -3056,13 +3056,20 @@ ieee802_1x_kay_init(struct ieee802_1x_kay_ctx *ctx, enum macsec_policy policy,
kay->macsec_replay_window = 0;
kay->macsec_confidentiality = CONFIDENTIALITY_NONE;
} else {
- kay->macsec_capable = MACSEC_CAP_INTEG_AND_CONF_0_30_50;
+ if (secy_get_capability(kay, &kay->macsec_capable) < 0) {
+ os_free(kay);
+ return NULL;
+ }
+
kay->macsec_desired = TRUE;
kay->macsec_protect = TRUE;
kay->macsec_validate = Strict;
kay->macsec_replay_protect = FALSE;
kay->macsec_replay_window = 0;
- kay->macsec_confidentiality = CONFIDENTIALITY_OFFSET_0;
+ if (kay->macsec_capable >= MACSEC_CAP_INTEG_AND_CONF)
+ kay->macsec_confidentiality = CONFIDENTIALITY_OFFSET_0;
+ else
+ kay->macsec_confidentiality = MACSEC_CAP_INTEGRITY;
}
wpa_printf(MSG_DEBUG, "KaY: state machine created");
@@ -3394,6 +3401,7 @@ ieee802_1x_kay_change_cipher_suite(struct ieee802_1x_kay *kay,
unsigned int cs_index)
{
struct ieee802_1x_mka_participant *participant;
+ enum macsec_cap secy_cap;
if (!kay)
return -1;
@@ -3412,6 +3420,12 @@ ieee802_1x_kay_change_cipher_suite(struct ieee802_1x_kay *kay,
kay->macsec_csindex = cs_index;
kay->macsec_capable = cipher_suite_tbl[kay->macsec_csindex].capable;
+ if (secy_get_capability(kay, &secy_cap) < 0)
+ return -3;
+
+ if (kay->macsec_capable > secy_cap)
+ kay->macsec_capable = secy_cap;
+
participant = ieee802_1x_kay_get_principal_participant(kay);
if (participant) {
wpa_printf(MSG_INFO, "KaY: Cipher Suite changed");
diff --git a/src/pae/ieee802_1x_kay.h b/src/pae/ieee802_1x_kay.h
index 1236923e02de..c6fa387ed1c1 100644
--- a/src/pae/ieee802_1x_kay.h
+++ b/src/pae/ieee802_1x_kay.h
@@ -134,6 +134,7 @@ struct ieee802_1x_kay_ctx {
/* abstract wpa driver interface */
int (*macsec_init)(void *ctx, struct macsec_init_params *params);
int (*macsec_deinit)(void *ctx);
+ int (*macsec_get_capability)(void *priv, enum macsec_cap *cap);
int (*enable_protect_frames)(void *ctx, Boolean enabled);
int (*set_replay_protect)(void *ctx, Boolean enabled, u32 window);
int (*set_current_cipher_suite)(void *ctx, u64 cs);
diff --git a/src/pae/ieee802_1x_secy_ops.c b/src/pae/ieee802_1x_secy_ops.c
index 1511055de391..b57c670f4d0b 100644
--- a/src/pae/ieee802_1x_secy_ops.c
+++ b/src/pae/ieee802_1x_secy_ops.c
@@ -113,6 +113,26 @@ int secy_cp_control_enable_port(struct ieee802_1x_kay *kay, Boolean enabled)
}
+int secy_get_capability(struct ieee802_1x_kay *kay, enum macsec_cap *cap)
+{
+ struct ieee802_1x_kay_ctx *ops;
+
+ if (!kay) {
+ wpa_printf(MSG_ERROR, "KaY: %s params invalid", __func__);
+ return -1;
+ }
+
+ ops = kay->ctx;
+ if (!ops || !ops->macsec_get_capability) {
+ wpa_printf(MSG_ERROR,
+ "KaY: secy macsec_get_capability operation not supported");
+ return -1;
+ }
+
+ return ops->macsec_get_capability(ops->ctx, cap);
+}
+
+
int secy_get_receive_lowest_pn(struct ieee802_1x_kay *kay,
struct receive_sa *rxsa)
{
diff --git a/src/pae/ieee802_1x_secy_ops.h b/src/pae/ieee802_1x_secy_ops.h
index 120ca3c7e883..bfd5737725e9 100644
--- a/src/pae/ieee802_1x_secy_ops.h
+++ b/src/pae/ieee802_1x_secy_ops.h
@@ -28,6 +28,7 @@ int secy_cp_control_confidentiality_offset(struct ieee802_1x_kay *kay,
int secy_cp_control_enable_port(struct ieee802_1x_kay *kay, Boolean flag);
/****** KaY -> SecY *******/
+int secy_get_capability(struct ieee802_1x_kay *kay, enum macsec_cap *cap);
int secy_get_receive_lowest_pn(struct ieee802_1x_kay *kay,
struct receive_sa *rxsa);
int secy_get_transmit_next_pn(struct ieee802_1x_kay *kay,
diff --git a/wpa_supplicant/driver_i.h b/wpa_supplicant/driver_i.h
index b8c797f2771d..d94d2527ba0f 100644
--- a/wpa_supplicant/driver_i.h
+++ b/wpa_supplicant/driver_i.h
@@ -715,6 +715,15 @@ static inline int wpa_drv_macsec_deinit(struct wpa_supplicant *wpa_s)
return wpa_s->driver->macsec_deinit(wpa_s->drv_priv);
}
+static inline int wpa_drv_macsec_get_capability(struct wpa_supplicant *wpa_s,
+ enum macsec_cap *cap)
+{
+ if (!wpa_s->driver->macsec_get_capability)
+ return -1;
+
+ return wpa_s->driver->macsec_get_capability(wpa_s->drv_priv, cap);
+}
+
static inline int wpa_drv_enable_protect_frames(struct wpa_supplicant *wpa_s,
Boolean enabled)
{
diff --git a/wpa_supplicant/wpas_kay.c b/wpa_supplicant/wpas_kay.c
index ad0312f03650..5e14d2cc2d46 100644
--- a/wpa_supplicant/wpas_kay.c
+++ b/wpa_supplicant/wpas_kay.c
@@ -38,6 +38,12 @@ static int wpas_macsec_deinit(void *priv)
}
+static int wpas_macsec_get_capability(void *priv, enum macsec_cap *cap)
+{
+ return wpa_drv_macsec_get_capability(priv, cap);
+}
+
+
static int wpas_enable_protect_frames(void *wpa_s, Boolean enabled)
{
return wpa_drv_enable_protect_frames(wpa_s, enabled);
@@ -180,6 +186,7 @@ int ieee802_1x_alloc_kay_sm(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid)
kay_ctx->macsec_init = wpas_macsec_init;
kay_ctx->macsec_deinit = wpas_macsec_deinit;
+ kay_ctx->macsec_get_capability = wpas_macsec_get_capability;
kay_ctx->enable_protect_frames = wpas_enable_protect_frames;
kay_ctx->set_replay_protect = wpas_set_replay_protect;
kay_ctx->set_current_cipher_suite = wpas_set_current_cipher_suite;
--
2.10.0
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