Accumulative patch from commit b618a469c42120e984ab1c85ed6058504d1fca78

  Author: Jouni Malinen <jouni@qca.qualcomm.com>
  Date:   Sat Feb 16 19:54:09 2013 +0200
    Interworking: Select highest priority cred if multiple matches

Interworking: Select highest priority cred if multiple matches
GAS server: Fix a regression in GAS server callback
hostapd: Fix Max SP Length derivation from QoS Info
nl80211: Configure STA Capabilities and Extended Capabilities
Synchronize with wireless-testing.git include/uapi/linux/nl80211.h
WPS: Fix build without CONFIG_WPS_NFC
WPS: Add support for NFC handover select generation with wpa_supplicant
WPS: Update NFC connection handover documentation
WPS: Add support for config token generation with wpa_supplicant
WPS: Allow password token to be written with nfcpy
WPS: Use pre-configured NFC password token instead of overriding it
TDLS: Pass peer's Capability and Ext Capability info during sta_add
TDLS: Pass peer's HT Capability and QOS information during sta_add
nl80211: Add debug prints for STA add/set operations
TDLS: Fix add/set STA operation
Synchronize with wireless-testing.git include/uapi/linux/nl80211.h
WPS: Allow Device Password to be changed from M1 to M2
WPS: Fix wps_reg nfc-pw option
TDLS: Tear down peers when disconnecting from the AP
P2P: Do not use old scan result data for peer discovery
Use more accurate timestamps for scan results
P2P: Postpone P2P-DEVICE-FOUND if config_methods not known
P2P: Do not allow peer update to clear config_methods
WPS: Report NFC connection handover completion differently
P2P: Avoid concurrent scans during all steps of group formation
P2P: Cancel group formation timeout on group removal (on client)
WPS: Change listen time to match nfcpy default (250 ms)
WPS: Report only the carrier record from NFC to wpa_supplicant
WPS: Fetch only the carrier record from wpa_supplicant for NFC
WPS: Update nfcpy script to support AP mode NFC connection handover
WPS: Add command for fetching carrier record for NFC handover
WPS: Clean up debug prints with nfcpy
WPS: Remove 0.5 sec extra wait from NFC handover with nfcpy
WPS: Use alternating poll/listen for NFC peer discovery with nfcpy
WPS: Configure logging to show nfcpy log message
WPS: Add an example python script for NFC operations with hostapd
hostapd: Do not change HT40 capability due to OBSS scan
dbus: Add missing signal description for WPS (7)
EAP peer: Add Session-Id derivation to more EAP methods
EAP peer: Add Session-Id derivation
EAP-IKEV2 server: Fix invalid memory freeing operation
eap_proxy: Add a dummy implementation for compilation testing
eap_proxy: Add mechanism for allowing EAP methods to be offloaded
Android: Allow setgroups to be overridden from build configuration
P2P: Send p2p_stop_find event on failure to start pending p2p_find
P2P: Fix GO Probe Response IEs when Wi-Fi Display is enabled
Capability matching for 60 GHz band
nl80211: Add ctrl_iface message for AP mode connection rejection
P2P: Allow local configuration to use 5 GHz band 40 MHz channels
Fix BSS RANGE command for no exact id match cases

Change-Id: Iac9284bba31db40911aecc3adf2843c9b1576db1
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>

2 files changed, 141 insertions, 0 deletions

diff --git a/src/eap_common/eap_gpsk_common.c b/src/eap_common/eap_gpsk_common.c
index 7d106dd0..7a33215f 100644
--- a/src/eap_common/eap_gpsk_common.c
+++ b/src/eap_common/eap_gpsk_common.c
@@ -340,6 +340,141 @@ int eap_gpsk_derive_keys(const u8 *psk, size_t psk_len, int vendor,
 }
 
 
+static int eap_gpsk_derive_mid_helper(u32 csuite_specifier,
+				      u8 *kdf_out, size_t kdf_out_len,
+				      const u8 *psk, const u8 *seed,
+				      size_t seed_len, u8 method_type)
+{
+	u8 *pos, *data;
+	size_t data_len;
+	int (*gkdf)(const u8 *_psk, const u8 *_data, size_t _data_len,
+		    u8 *buf, size_t len);
+
+	gkdf = NULL;
+	switch (csuite_specifier) {
+	case EAP_GPSK_CIPHER_AES:
+		gkdf = eap_gpsk_gkdf_cmac;
+		break;
+#ifdef EAP_GPSK_SHA256
+	case EAP_GPSK_CIPHER_SHA256:
+		gkdf = eap_gpsk_gkdf_sha256;
+		break;
+#endif /* EAP_GPSK_SHA256 */
+	default:
+		wpa_printf(MSG_DEBUG, "EAP-GPSK: Unknown cipher %d used in "
+			   "Session-Id derivation", csuite_specifier);
+		return -1;
+	}
+
+#define SID_LABEL "Method ID"
+	/* "Method ID" || EAP_Method_Type || CSuite_Sel || inputString */
+	data_len = strlen(SID_LABEL) + 1 + 6 + seed_len;
+	data = os_malloc(data_len);
+	if (data == NULL)
+		return -1;
+	pos = data;
+	os_memcpy(pos, SID_LABEL, strlen(SID_LABEL));
+	pos += strlen(SID_LABEL);
+#undef SID_LABEL
+	os_memcpy(pos, &method_type, 1);
+	pos += 1;
+	WPA_PUT_BE32(pos, EAP_GPSK_VENDOR_IETF); /* CSuite/Vendor = IETF */
+	pos += 4;
+	WPA_PUT_BE16(pos, csuite_specifier); /* CSuite/Specifier */
+	pos += 2;
+	os_memcpy(pos, seed, seed_len); /* inputString */
+	wpa_hexdump(MSG_DEBUG, "EAP-GPSK: Data to Method ID derivation",
+		    data, data_len);
+
+	if (gkdf(psk, data, data_len, kdf_out, kdf_out_len) < 0) {
+		os_free(data);
+		return -1;
+	}
+	os_free(data);
+	wpa_hexdump(MSG_DEBUG, "EAP-GPSK: Method ID", kdf_out, kdf_out_len);
+
+	return 0;
+}
+
+
+/**
+ * eap_gpsk_session_id - Derive EAP-GPSK Session ID
+ * @psk: Pre-shared key
+ * @psk_len: Length of psk in bytes
+ * @vendor: CSuite/Vendor
+ * @specifier: CSuite/Specifier
+ * @rand_peer: 32-byte RAND_Peer
+ * @rand_server: 32-byte RAND_Server
+ * @id_peer: ID_Peer
+ * @id_peer_len: Length of ID_Peer
+ * @id_server: ID_Server
+ * @id_server_len: Length of ID_Server
+ * @method_type: EAP Authentication Method Type
+ * @sid: Buffer for 17-byte Session ID
+ * @sid_len: Buffer for returning length of Session ID
+ * Returns: 0 on success, -1 on failure
+ */
+int eap_gpsk_derive_session_id(const u8 *psk, size_t psk_len, int vendor,
+			       int specifier,
+			       const u8 *rand_peer, const u8 *rand_server,
+			       const u8 *id_peer, size_t id_peer_len,
+			       const u8 *id_server, size_t id_server_len,
+			       u8 method_type, u8 *sid, size_t *sid_len)
+{
+	u8 *seed, *pos;
+	u8 kdf_out[16];
+	size_t seed_len;
+	int ret;
+
+	wpa_printf(MSG_DEBUG, "EAP-GPSK: Deriving Session ID(%d:%d)",
+		   vendor, specifier);
+
+	if (vendor != EAP_GPSK_VENDOR_IETF)
+		return -1;
+
+	wpa_hexdump_key(MSG_DEBUG, "EAP-GPSK: PSK", psk, psk_len);
+
+	/*
+	 * inputString = RAND_Peer || ID_Peer || RAND_Server || ID_Server
+	 *            (= seed)
+	 * KS = 16, CSuite_Sel = 0x00000000 0x0001
+	 * Method-ID = GKDF-16 (zero, "Method ID" || EAP_Method_Type ||
+	 *                      CSuite_Sel || inputString)
+	 */
+	seed_len = 2 * EAP_GPSK_RAND_LEN + id_server_len + id_peer_len;
+	seed = os_malloc(seed_len);
+	if (seed == NULL) {
+		wpa_printf(MSG_DEBUG, "EAP-GPSK: Failed to allocate memory "
+			   "for Session-Id derivation");
+		return -1;
+	}
+
+	pos = seed;
+	os_memcpy(pos, rand_peer, EAP_GPSK_RAND_LEN);
+	pos += EAP_GPSK_RAND_LEN;
+	os_memcpy(pos, id_peer, id_peer_len);
+	pos += id_peer_len;
+	os_memcpy(pos, rand_server, EAP_GPSK_RAND_LEN);
+	pos += EAP_GPSK_RAND_LEN;
+	os_memcpy(pos, id_server, id_server_len);
+	pos += id_server_len;
+	wpa_hexdump(MSG_DEBUG, "EAP-GPSK: Seed", seed, seed_len);
+
+	ret = eap_gpsk_derive_mid_helper(specifier,
+					 kdf_out, sizeof(kdf_out),
+					 psk, seed, seed_len,
+					 method_type);
+
+	sid[0] = method_type;
+	os_memcpy(sid + 1, kdf_out, sizeof(kdf_out));
+	*sid_len = 1 + sizeof(kdf_out);
+
+	os_free(seed);
+
+	return ret;
+}
+
+
 /**
  * eap_gpsk_mic_len - Get the length of the MIC
  * @vendor: CSuite/Vendor
diff --git a/src/eap_common/eap_gpsk_common.h b/src/eap_common/eap_gpsk_common.h
index e3d2b6b4..fbcd5473 100644
--- a/src/eap_common/eap_gpsk_common.h
+++ b/src/eap_common/eap_gpsk_common.h
@@ -53,6 +53,12 @@ int eap_gpsk_derive_keys(const u8 *psk, size_t psk_len, int vendor,
 			 const u8 *id_server, size_t id_server_len,
 			 u8 *msk, u8 *emsk, u8 *sk, size_t *sk_len,
 			 u8 *pk, size_t *pk_len);
+int eap_gpsk_derive_session_id(const u8 *psk, size_t psk_len, int vendor,
+			       int specifier,
+			       const u8 *rand_peer, const u8 *rand_server,
+			       const u8 *id_peer, size_t id_peer_len,
+			       const u8 *id_server, size_t id_server_len,
+			       u8 method_type, u8 *sid, size_t *sid_len);
 size_t eap_gpsk_mic_len(int vendor, int specifier);
 int eap_gpsk_compute_mic(const u8 *sk, size_t sk_len, int vendor,
 			 int specifier, const u8 *data, size_t len, u8 *mic);