From ead40f04314b92242f543161a2abc97a787d6f80 Mon Sep 17 00:00:00 2001
From: Denis Kenzior <denkenz@gmail.com>
Date: Wed, 31 Aug 2016 14:14:01 -0500
Subject: [PATCH] wscutil: Add wsc_parse_m8

---
 src/wscutil.c | 27 +++++++++++++++++++++++++++
 src/wscutil.h |  8 ++++++++
 2 files changed, 35 insertions(+)

diff --git a/src/wscutil.c b/src/wscutil.c
index 3ed3b143..5a8cdedf 100644
--- a/src/wscutil.c
+++ b/src/wscutil.c
@@ -1279,6 +1279,33 @@ int wsc_parse_m7_encrypted_settings(const uint8_t *pdu, uint32_t len,
 			WSC_ATTR_INVALID);
 }
 
+int wsc_parse_m8(const uint8_t *pdu, uint32_t len, struct wsc_m8 *out,
+						struct iovec *out_encrypted)
+{
+	int r;
+	struct wsc_wfa_ext_iter iter;
+	uint8_t version;
+	enum wsc_message_type msg_type;
+
+	memset(out, 0, sizeof(struct wsc_m8));
+
+	r = wsc_parse_attrs(pdu, len, &out->version2, &iter,
+		WSC_ATTR_AUTHENTICATOR, out->authenticator,
+		REQUIRED(VERSION, &version),
+		REQUIRED(MESSAGE_TYPE, &msg_type),
+		REQUIRED(ENROLLEE_NONCE, &out->enrollee_nonce),
+		REQUIRED(ENCRYPTED_SETTINGS, out_encrypted),
+		WSC_ATTR_INVALID);
+
+	if (r < 0)
+		return r;
+
+	if (msg_type != WSC_MESSAGE_TYPE_M8)
+		return -EBADMSG;
+
+	return 0;
+}
+
 int wsc_parse_nack(const uint8_t *pdu, uint32_t len, struct wsc_nack *out)
 {
 	int r;
diff --git a/src/wscutil.h b/src/wscutil.h
index 5043ad12..4889cb5f 100644
--- a/src/wscutil.h
+++ b/src/wscutil.h
@@ -492,6 +492,12 @@ struct wsc_m7_encrypted_settings {
 	uint8_t authenticator[8];
 };
 
+struct wsc_m8 {
+	bool version2;
+	uint8_t enrollee_nonce[16];
+	uint8_t authenticator[8];
+};
+
 struct wsc_nack {
 	bool version2;
 	uint8_t enrollee_nonce[16];
@@ -525,6 +531,8 @@ int wsc_parse_m7(const uint8_t *pdu, uint32_t len, struct wsc_m7 *out,
 						struct iovec *out_encrypted);
 int wsc_parse_m7_encrypted_settings(const uint8_t *pdu, uint32_t len,
 					struct wsc_m7_encrypted_settings *out);
+int wsc_parse_m8(const uint8_t *pdu, uint32_t len, struct wsc_m8 *out,
+						struct iovec *out_encrypted);
 
 int wsc_parse_nack(const uint8_t *pdu, uint32_t len, struct wsc_nack *out);