diff --git a/components/bt/esp_ble_mesh/mesh_common/include/mesh_buf.h b/components/bt/esp_ble_mesh/mesh_common/include/mesh_buf.h
index f990c2b354..10cd305a9d 100644
--- a/components/bt/esp_ble_mesh/mesh_common/include/mesh_buf.h
+++ b/components/bt/esp_ble_mesh/mesh_common/include/mesh_buf.h
@@ -313,6 +313,30 @@ void net_buf_simple_add_le48(struct net_buf_simple *buf, u64_t val);
  */
 void net_buf_simple_add_be48(struct net_buf_simple *buf, u64_t val);
 
+/**
+ * @brief Add 64-bit value at the end of the buffer
+ *
+ * Adds 64-bit value in little endian format at the end of buffer.
+ * Increments the data length of a buffer to account for more data
+ * at the end.
+ *
+ * @param buf Buffer to update.
+ * @param val 64-bit value to be added.
+ */
+void net_buf_simple_add_le64(struct net_buf_simple *buf, u64_t val);
+
+/**
+ * @brief Add 64-bit value at the end of the buffer
+ *
+ * Adds 64-bit value in big endian format at the end of buffer.
+ * Increments the data length of a buffer to account for more data
+ * at the end.
+ *
+ * @param buf Buffer to update.
+ * @param val 64-bit value to be added.
+ */
+void net_buf_simple_add_be64(struct net_buf_simple *buf, u64_t val);
+
 /**
  * @brief Push data to the beginning of the buffer.
  *
@@ -492,6 +516,30 @@ u64_t net_buf_simple_pull_le48(struct net_buf_simple *buf);
  */
 u64_t net_buf_simple_pull_be48(struct net_buf_simple *buf);
 
+/**
+ * @brief Remove and convert 64 bits from the beginning of the buffer.
+ *
+ * Same idea as with net_buf_simple_pull(), but a helper for operating
+ * on 64-bit little endian data.
+ *
+ * @param buf A valid pointer on a buffer.
+ *
+ * @return 64-bit value converted from little endian to host endian.
+ */
+u64_t net_buf_simple_pull_le64(struct net_buf_simple *buf);
+
+/**
+ * @brief Remove and convert 64 bits from the beginning of the buffer.
+ *
+ * Same idea as with net_buf_simple_pull(), but a helper for operating
+ * on 64-bit big endian data.
+ *
+ * @param buf A valid pointer on a buffer.
+ *
+ * @return 64-bit value converted from big endian to host endian.
+ */
+u64_t net_buf_simple_pull_be64(struct net_buf_simple *buf);
+
 /**
  * @brief Get the tail pointer for a buffer.
  *
@@ -1056,6 +1104,32 @@ static inline void *net_buf_user_data(struct net_buf *buf)
  */
 #define net_buf_add_be48(buf, val) net_buf_simple_add_be48(&(buf)->b, val)
 
+/**
+ * @def net_buf_add_le64
+ * @brief Add 64-bit value at the end of the buffer
+ *
+ * Adds 64-bit value in little endian format at the end of buffer.
+ * Increments the data length of a buffer to account for more data
+ * at the end.
+ *
+ * @param buf Buffer to update.
+ * @param val 64-bit value to be added.
+ */
+#define net_buf_add_le64(buf, val) net_buf_simple_add_le64(&(buf)->b, val)
+
+/**
+ * @def net_buf_add_be64
+ * @brief Add 64-bit value at the end of the buffer
+ *
+ * Adds 64-bit value in big endian format at the end of buffer.
+ * Increments the data length of a buffer to account for more data
+ * at the end.
+ *
+ * @param buf Buffer to update.
+ * @param val 64-bit value to be added.
+ */
+#define net_buf_add_be64(buf, val) net_buf_simple_add_be64(&(buf)->b, val)
+
 /**
  *  @def net_buf_push
  *  @brief Push data to the beginning of the buffer.
@@ -1250,6 +1324,32 @@ static inline void *net_buf_user_data(struct net_buf *buf)
  */
 #define net_buf_pull_be48(buf) net_buf_simple_pull_be48(&(buf)->b)
 
+/**
+ * @def net_buf_pull_le64
+ * @brief Remove and convert 64 bits from the beginning of the buffer.
+ *
+ * Same idea as with net_buf_pull(), but a helper for operating on
+ * 64-bit little endian data.
+ *
+ * @param buf A valid pointer on a buffer.
+ *
+ * @return 64-bit value converted from little endian to host endian.
+ */
+#define net_buf_pull_le64(buf) net_buf_simple_pull_le64(&(buf)->b)
+
+/**
+ * @def net_buf_pull_be64
+ * @brief Remove and convert 64 bits from the beginning of the buffer.
+ *
+ * Same idea as with net_buf_pull(), but a helper for operating on
+ * 64-bit big endian data.
+ *
+ * @param buf A valid pointer on a buffer
+ *
+ * @return 64-bit value converted from big endian to host endian.
+ */
+#define net_buf_pull_be64(buf) net_buf_simple_pull_be64(&(buf)->b)
+
 /**
  *  @def net_buf_tailroom
  *  @brief Check buffer tailroom.
diff --git a/components/bt/esp_ble_mesh/mesh_common/include/mesh_util.h b/components/bt/esp_ble_mesh/mesh_common/include/mesh_util.h
index bf9fa3a0b0..de6e0ad1ec 100644
--- a/components/bt/esp_ble_mesh/mesh_common/include/mesh_util.h
+++ b/components/bt/esp_ble_mesh/mesh_common/include/mesh_util.h
@@ -431,6 +431,21 @@ static inline void sys_put_be48(u64_t val, u8_t dst[6])
     sys_put_be32(val, &dst[2]);
 }
 
+/**
+ *  @brief Put a 64-bit integer as big-endian to arbitrary location.
+ *
+ *  Put a 64-bit integer, originally in host endianness, to a
+ *  potentially unaligned memory location in big-endian format.
+ *
+ *  @param val 64-bit integer in host endianness.
+ *  @param dst Destination memory address to store the result.
+ */
+static inline void sys_put_be64(u64_t val, u8_t dst[8])
+{
+    sys_put_be32(val >> 32, dst);
+    sys_put_be32(val, &dst[4]);
+}
+
 /**
  *  @brief Put a 16-bit integer as little-endian to arbitrary location.
  *
@@ -566,6 +581,21 @@ static inline u64_t sys_get_be48(const u8_t src[6])
     return ((u64_t)sys_get_be32(&src[0]) << 32) | sys_get_be16(&src[4]);
 }
 
+/**
+ *  @brief Get a 64-bit integer stored in big-endian format.
+ *
+ *  Get a 64-bit integer, stored in big-endian format in a potentially
+ *  unaligned memory location, and convert it to the host endianness.
+ *
+ *  @param src Location of the big-endian 64-bit integer to get.
+ *
+ *  @return 64-bit integer in host endianness.
+ */
+static inline u64_t sys_get_be64(const u8_t src[8])
+{
+    return ((u64_t)sys_get_be32(&src[0]) << 32) | sys_get_be32(&src[4]);
+}
+
 /**
  *  @brief Get a 16-bit integer stored in little-endian format.
  *
diff --git a/components/bt/esp_ble_mesh/mesh_common/mesh_buf.c b/components/bt/esp_ble_mesh/mesh_common/mesh_buf.c
index 1fe3189fba..b875d285ba 100644
--- a/components/bt/esp_ble_mesh/mesh_common/mesh_buf.c
+++ b/components/bt/esp_ble_mesh/mesh_common/mesh_buf.c
@@ -128,6 +128,20 @@ void net_buf_simple_add_be48(struct net_buf_simple *buf, u64_t val)
     sys_put_be48(val, net_buf_simple_add(buf, 6));
 }
 
+void net_buf_simple_add_le64(struct net_buf_simple *buf, u64_t val)
+{
+    NET_BUF_SIMPLE_DBG("buf %p val %" PRIu64, buf, val);
+
+    sys_put_le64(val, net_buf_simple_add(buf, sizeof(val)));
+}
+
+void net_buf_simple_add_be64(struct net_buf_simple *buf, u64_t val)
+{
+    NET_BUF_SIMPLE_DBG("buf %p val %" PRIu64, buf, val);
+
+    sys_put_be64(val, net_buf_simple_add(buf, sizeof(val)));
+}
+
 void *net_buf_simple_push(struct net_buf_simple *buf, size_t len)
 {
     NET_BUF_SIMPLE_DBG("buf %p len %u", buf, len);
@@ -284,6 +298,26 @@ u64_t net_buf_simple_pull_be48(struct net_buf_simple *buf)
     return sys_be48_to_cpu(val.u48);
 }
 
+u64_t net_buf_simple_pull_le64(struct net_buf_simple *buf)
+{
+    u64_t val;
+
+    val = UNALIGNED_GET((u64_t *)buf->data);
+    net_buf_simple_pull(buf, sizeof(val));
+
+    return sys_le64_to_cpu(val);
+}
+
+u64_t net_buf_simple_pull_be64(struct net_buf_simple *buf)
+{
+    u64_t val;
+
+    val = UNALIGNED_GET((u64_t *)buf->data);
+    net_buf_simple_pull(buf, sizeof(val));
+
+    return sys_be64_to_cpu(val);
+}
+
 size_t net_buf_simple_headroom(struct net_buf_simple *buf)
 {
     return buf->data - buf->__buf;