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wpa_supplicant/SOURCES/wpa_supplicant-MACsec-Support-GCM-AES-256-cipher-suite.patch

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From 46c635910a724ed14ee9ace549fed9790ed5980b Mon Sep 17 00:00:00 2001
Message-ID: <46c635910a724ed14ee9ace549fed9790ed5980b.1706279119.git.davide.caratti@gmail.com>
From: leiwei <quic_leiwei@quicinc.com>
Date: Mon, 15 Nov 2021 18:22:19 +0800
Subject: [PATCH] MACsec: Support GCM-AES-256 cipher suite
Allow macsec_csindex to be configured and select the cipher suite when
the participant acts as a key server.
Signed-off-by: leiwei <quic_leiwei@quicinc.com>
---
hostapd/config_file.c | 10 ++++++++++
hostapd/hostapd.conf | 4 ++++
src/ap/ap_config.h | 7 +++++++
src/ap/wpa_auth_kay.c | 4 +++-
src/pae/ieee802_1x_cp.c | 8 ++++----
src/pae/ieee802_1x_kay.c | 17 +++++++++++++----
src/pae/ieee802_1x_kay.h | 3 ++-
wpa_supplicant/config.c | 1 +
wpa_supplicant/config_file.c | 1 +
wpa_supplicant/config_ssid.h | 7 +++++++
wpa_supplicant/wpas_kay.c | 4 ++--
11 files changed, 54 insertions(+), 12 deletions(-)
--- a/src/ap/ap_config.h
+++ b/src/ap/ap_config.h
@@ -849,6 +849,13 @@ struct hostapd_bss_config {
int mka_priority;
/**
+ * macsec_csindex - Cipher suite index for MACsec
+ *
+ * Range: 0-1 (default: 0)
+ */
+ int macsec_csindex;
+
+ /**
* mka_ckn - MKA pre-shared CKN
*/
#define MACSEC_CKN_MAX_LEN 32
--- a/src/ap/wpa_auth_kay.c
+++ b/src/ap/wpa_auth_kay.c
@@ -329,7 +329,9 @@ int ieee802_1x_alloc_kay_sm_hapd(struct
hapd->conf->macsec_replay_protect,
hapd->conf->macsec_replay_window,
hapd->conf->macsec_port,
- hapd->conf->mka_priority, hapd->conf->iface,
+ hapd->conf->mka_priority,
+ hapd->conf->macsec_csindex,
+ hapd->conf->iface,
hapd->own_addr);
/* ieee802_1x_kay_init() frees kay_ctx on failure */
if (!res)
--- a/src/pae/ieee802_1x_cp.c
+++ b/src/pae/ieee802_1x_cp.c
@@ -20,7 +20,7 @@
#define STATE_MACHINE_DATA struct ieee802_1x_cp_sm
#define STATE_MACHINE_DEBUG_PREFIX "CP"
-static u64 default_cs_id = CS_ID_GCM_AES_128;
+static u64 cs_id[] = { CS_ID_GCM_AES_128, CS_ID_GCM_AES_256 };
/* The variable defined in clause 12 in IEEE Std 802.1X-2010 */
enum connect_type { PENDING, UNAUTHENTICATED, AUTHENTICATED, SECURE };
@@ -210,7 +210,6 @@ SM_STATE(CP, SECURED)
sm->replay_protect = sm->kay->macsec_replay_protect;
sm->validate_frames = sm->kay->macsec_validate;
- /* NOTE: now no other than default cipher suite (AES-GCM-128) */
sm->current_cipher_suite = sm->cipher_suite;
secy_cp_control_current_cipher_suite(sm->kay, sm->current_cipher_suite);
@@ -473,8 +472,8 @@ struct ieee802_1x_cp_sm * ieee802_1x_cp_
sm->orx = false;
sm->otx = false;
- sm->current_cipher_suite = default_cs_id;
- sm->cipher_suite = default_cs_id;
+ sm->current_cipher_suite = cs_id[kay->macsec_csindex];
+ sm->cipher_suite = cs_id[kay->macsec_csindex];
sm->cipher_offset = CONFIDENTIALITY_OFFSET_0;
sm->confidentiality_offset = sm->cipher_offset;
sm->transmit_delay = MKA_LIFE_TIME;
@@ -491,6 +490,7 @@ struct ieee802_1x_cp_sm * ieee802_1x_cp_
secy_cp_control_enable_port(sm->kay, sm->controlled_port_enabled);
secy_cp_control_confidentiality_offset(sm->kay,
sm->confidentiality_offset);
+ secy_cp_control_current_cipher_suite(sm->kay, sm->current_cipher_suite);
SM_STEP_RUN(CP);
--- a/src/pae/ieee802_1x_kay.c
+++ b/src/pae/ieee802_1x_kay.c
@@ -221,8 +221,16 @@ ieee802_1x_mka_dump_dist_sak_body(struct
wpa_printf(MSG_DEBUG, "\tKey Number............: %d",
be_to_host32(body->kn));
- /* TODO: Other than GCM-AES-128 case: MACsec Cipher Suite */
- wpa_hexdump(MSG_DEBUG, "\tAES Key Wrap of SAK...:", body->sak, 24);
+ if (body_len == 28) {
+ wpa_hexdump(MSG_DEBUG, "\tAES Key Wrap of SAK...:",
+ body->sak, 24);
+ } else if (body_len > CS_ID_LEN - sizeof(body->kn)) {
+ wpa_hexdump(MSG_DEBUG, "\tMACsec Cipher Suite...:",
+ body->sak, CS_ID_LEN);
+ wpa_hexdump(MSG_DEBUG, "\tAES Key Wrap of SAK...:",
+ body->sak + CS_ID_LEN,
+ body_len - CS_ID_LEN - sizeof(body->kn));
+ }
}
@@ -3456,7 +3464,8 @@ static void kay_l2_receive(void *ctx, co
struct ieee802_1x_kay *
ieee802_1x_kay_init(struct ieee802_1x_kay_ctx *ctx, enum macsec_policy policy,
bool macsec_replay_protect, u32 macsec_replay_window,
- u16 port, u8 priority, const char *ifname, const u8 *addr)
+ u16 port, u8 priority, u32 macsec_csindex,
+ const char *ifname, const u8 *addr)
{
struct ieee802_1x_kay *kay;
@@ -3493,7 +3502,7 @@ ieee802_1x_kay_init(struct ieee802_1x_ka
kay->dist_time = 0;
kay->pn_exhaustion = PENDING_PN_EXHAUSTION;
- kay->macsec_csindex = DEFAULT_CS_INDEX;
+ kay->macsec_csindex = macsec_csindex;
kay->mka_algindex = DEFAULT_MKA_ALG_INDEX;
kay->mka_version = MKA_VERSION_ID;
--- a/src/pae/ieee802_1x_kay.h
+++ b/src/pae/ieee802_1x_kay.h
@@ -240,7 +240,8 @@ u64 mka_sci_u64(struct ieee802_1x_mka_sc
struct ieee802_1x_kay *
ieee802_1x_kay_init(struct ieee802_1x_kay_ctx *ctx, enum macsec_policy policy,
bool macsec_replay_protect, u32 macsec_replay_window,
- u16 port, u8 priority, const char *ifname, const u8 *addr);
+ u16 port, u8 priority, u32 macsec_csindex,
+ const char *ifname, const u8 *addr);
void ieee802_1x_kay_deinit(struct ieee802_1x_kay *kay);
struct ieee802_1x_mka_participant *
--- a/wpa_supplicant/config.c
+++ b/wpa_supplicant/config.c
@@ -2612,6 +2612,7 @@ static const struct parse_data ssid_fiel
{ INT(macsec_replay_window) },
{ INT_RANGE(macsec_port, 1, 65534) },
{ INT_RANGE(mka_priority, 0, 255) },
+ { INT_RANGE(macsec_csindex, 0, 1) },
{ FUNC_KEY(mka_cak) },
{ FUNC_KEY(mka_ckn) },
#endif /* CONFIG_MACSEC */
--- a/wpa_supplicant/config_file.c
+++ b/wpa_supplicant/config_file.c
@@ -810,6 +810,7 @@ static void wpa_config_write_network(FIL
INT(macsec_replay_window);
INT(macsec_port);
INT_DEF(mka_priority, DEFAULT_PRIO_NOT_KEY_SERVER);
+ INT(macsec_csindex);
#endif /* CONFIG_MACSEC */
#ifdef CONFIG_HS20
INT(update_identifier);
--- a/wpa_supplicant/config_ssid.h
+++ b/wpa_supplicant/config_ssid.h
@@ -912,6 +912,13 @@ struct wpa_ssid {
int mka_priority;
/**
+ * macsec_csindex - Cipher suite index for MACsec
+ *
+ * Range: 0-1 (default: 0)
+ */
+ int macsec_csindex;
+
+ /**
* mka_ckn - MKA pre-shared CKN
*/
#define MACSEC_CKN_MAX_LEN 32
--- a/wpa_supplicant/wpas_kay.c
+++ b/wpa_supplicant/wpas_kay.c
@@ -241,8 +241,8 @@ int ieee802_1x_alloc_kay_sm(struct wpa_s
res = ieee802_1x_kay_init(kay_ctx, policy, ssid->macsec_replay_protect,
ssid->macsec_replay_window, ssid->macsec_port,
- ssid->mka_priority, wpa_s->ifname,
- wpa_s->own_addr);
+ ssid->mka_priority, ssid->macsec_csindex,
+ wpa_s->ifname, wpa_s->own_addr);
/* ieee802_1x_kay_init() frees kay_ctx on failure */
if (res == NULL)
return -1;
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