diff --git a/components/bt/CMakeLists.txt b/components/bt/CMakeLists.txt
index 55f2397335..4958cf6b44 100644
--- a/components/bt/CMakeLists.txt
+++ b/components/bt/CMakeLists.txt
@@ -299,6 +299,7 @@ if(CONFIG_BT_ENABLED)
                    "host/bluedroid/stack/gatt/gatt_db.c"
                    "host/bluedroid/stack/gatt/gatt_main.c"
                    "host/bluedroid/stack/gatt/gatt_sr.c"
+                   "host/bluedroid/stack/gatt/gatt_sr_hash.c"
                    "host/bluedroid/stack/gatt/gatt_utils.c"
                    "host/bluedroid/stack/hcic/hciblecmds.c"
                    "host/bluedroid/stack/hcic/hcicmds.c"
diff --git a/components/bt/host/bluedroid/stack/gatt/gatt_sr_hash.c b/components/bt/host/bluedroid/stack/gatt/gatt_sr_hash.c
new file mode 100644
index 0000000000..f302e2b13f
--- /dev/null
+++ b/components/bt/host/bluedroid/stack/gatt/gatt_sr_hash.c
@@ -0,0 +1,171 @@
+#include "common/bt_target.h"
+#include "osi/allocator.h"
+
+#include <string.h>
+#include "gatt_int.h"
+#include "stack/l2c_api.h"
+#include "l2c_int.h"
+#include "smp_int.h"
+
+#if (BLE_INCLUDED == TRUE && GATTS_INCLUDED == TRUE)
+static void attr_uuid_to_bt_uuid(void *p_attr, tBT_UUID *p_uuid)
+{
+    tGATT_ATTR16 *p_attr16 = (tGATT_ATTR16 *)p_attr;
+
+    if (p_attr16->uuid_type == GATT_ATTR_UUID_TYPE_16) {
+        p_uuid->len = LEN_UUID_16;
+        p_uuid->uu.uuid16 = p_attr16->uuid;
+    } else if (p_attr16->uuid_type == GATT_ATTR_UUID_TYPE_32) {
+        tGATT_ATTR32 *p_attr32 = (tGATT_ATTR32 *)p_attr;
+        p_uuid->len = LEN_UUID_32;
+        p_uuid->uu.uuid32 = p_attr32->uuid;
+    } else if (p_attr16->uuid_type == GATT_ATTR_UUID_TYPE_128) {
+        tGATT_ATTR128 *p_attr128 = (tGATT_ATTR128 *)p_attr;
+        p_uuid->len = LEN_UUID_128;
+        memcpy(p_uuid->uu.uuid128, p_attr128->uuid, LEN_UUID_128);
+    }
+}
+
+static size_t calculate_database_info_size(void)
+{
+    UINT8 i;
+    tGATT_SVC_DB *p_db;
+    tGATT_ATTR16 *p_attr;
+    size_t len = 0;
+
+    for (i = 0; i < GATT_MAX_SR_PROFILES; i++) {
+        p_db = gatt_cb.sr_reg[i].p_db;
+        if (p_db && p_db->p_attr_list) {
+            p_attr = (tGATT_ATTR16 *)p_db->p_attr_list;
+            while (p_attr) {
+                if (p_attr->uuid == GATT_UUID_PRI_SERVICE ||
+                    p_attr->uuid == GATT_UUID_SEC_SERVICE) {
+                    // Service declaration
+                    len += 4 + p_attr->p_value->uuid.len;
+                } else if (p_attr->uuid == GATT_UUID_INCLUDE_SERVICE) {
+                    // Included service declaration
+                    len += 8 + p_attr->p_value->incl_handle.service_type.len;
+                } else if (p_attr->uuid == GATT_UUID_CHAR_DECLARE) {
+                    tBT_UUID char_uuid;
+                    // Characteristic declaration
+                    p_attr = (tGATT_ATTR16 *)p_attr->p_next;
+                    attr_uuid_to_bt_uuid((void *)p_attr, &char_uuid);
+                    // Increment 1 to fetch characteristic uuid from value declaration attribute
+                    len += 7 + char_uuid.len;
+                } else if (p_attr->uuid == GATT_UUID_CHAR_DESCRIPTION ||
+                    p_attr->uuid == GATT_UUID_CHAR_CLIENT_CONFIG ||
+                    p_attr->uuid == GATT_UUID_CHAR_SRVR_CONFIG ||
+                    p_attr->uuid == GATT_UUID_CHAR_PRESENT_FORMAT ||
+                    p_attr->uuid == GATT_UUID_CHAR_AGG_FORMAT) {
+                    // Descriptor
+                    len += 4;
+                } else if (p_attr->uuid == GATT_UUID_CHAR_EXT_PROP) {
+                    // Descriptor
+                    len += 6;
+                }
+                p_attr = (tGATT_ATTR16 *) p_attr->p_next;
+            }
+        }
+    }
+
+    return len;
+}
+
+static void fill_database_info(UINT8 *p_data)
+{
+    UINT8 i;
+    tGATT_SVC_DB *p_db;
+    tGATT_ATTR16 *p_attr;
+
+    for (i = 0; i < GATT_MAX_SR_PROFILES; i++) {
+        p_db = gatt_cb.sr_reg[i].p_db;
+        if (p_db && p_db->p_attr_list) {
+            p_attr = (tGATT_ATTR16 *)p_db->p_attr_list;
+            while (p_attr) {
+                if (p_attr->uuid == GATT_UUID_PRI_SERVICE ||
+                    p_attr->uuid == GATT_UUID_SEC_SERVICE) {
+                    // Service declaration
+                    UINT16_TO_STREAM(p_data, p_attr->handle);
+                    UINT16_TO_STREAM(p_data, p_attr->uuid);
+                    gatt_build_uuid_to_stream(&p_data, p_attr->p_value->uuid);
+                } else if (p_attr->uuid == GATT_UUID_INCLUDE_SERVICE) {
+                    // Included service declaration
+                    UINT16_TO_STREAM(p_data, p_attr->handle);
+                    UINT16_TO_STREAM(p_data, GATT_UUID_INCLUDE_SERVICE);
+                    UINT16_TO_STREAM(p_data, p_attr->p_value->incl_handle.s_handle);
+                    UINT16_TO_STREAM(p_data, p_attr->p_value->incl_handle.e_handle);
+                    gatt_build_uuid_to_stream(&p_data, p_attr->p_value->incl_handle.service_type);
+                } else if (p_attr->uuid == GATT_UUID_CHAR_DECLARE) {
+                    tBT_UUID char_uuid;
+                    // Characteristic declaration
+                    UINT16_TO_STREAM(p_data, p_attr->handle);
+                    UINT16_TO_STREAM(p_data, GATT_UUID_CHAR_DECLARE);
+                    UINT8_TO_STREAM(p_data, p_attr->p_value->char_decl.property);
+                    UINT16_TO_STREAM(p_data, p_attr->p_value->char_decl.char_val_handle);
+                    p_attr = (tGATT_ATTR16 *)p_attr->p_next;
+                    attr_uuid_to_bt_uuid((void *)p_attr, &char_uuid);
+                    // Increment 1 to fetch characteristic uuid from value declaration attribute
+                    gatt_build_uuid_to_stream(&p_data, char_uuid);
+                } else if (p_attr->uuid == GATT_UUID_CHAR_DESCRIPTION ||
+                    p_attr->uuid == GATT_UUID_CHAR_CLIENT_CONFIG ||
+                    p_attr->uuid == GATT_UUID_CHAR_SRVR_CONFIG ||
+                    p_attr->uuid == GATT_UUID_CHAR_PRESENT_FORMAT ||
+                    p_attr->uuid == GATT_UUID_CHAR_AGG_FORMAT) {
+                    // Descriptor
+                    UINT16_TO_STREAM(p_data, p_attr->handle);
+                    UINT16_TO_STREAM(p_data, p_attr->uuid);
+                } else if (p_attr->uuid == GATT_UUID_CHAR_EXT_PROP) {
+                    // Descriptor
+                    UINT16_TO_STREAM(p_data, p_attr->handle);
+                    UINT16_TO_STREAM(p_data, p_attr->uuid);
+                    // TODO: process extended properties descriptor
+                    if (p_attr->p_value->attr_val.attr_len == 2) {
+                        memcpy(p_data, p_attr->p_value->attr_val.attr_val, 2);
+                    } else {
+                        UINT16_TO_STREAM(p_data, 0x0000);
+                    }
+                }
+                p_attr = (tGATT_ATTR16 *) p_attr->p_next;
+            }
+        }
+    }
+}
+
+tGATT_STATUS gatts_calculate_datebase_hash(BT_OCTET16 hash)
+{
+    UINT8 tmp;
+    UINT16 i;
+    UINT16 j;
+    size_t len;
+    UINT8 *data_buf = NULL;
+
+    len = calculate_database_info_size();
+
+    data_buf = (UINT8 *)osi_malloc(len);
+    if (data_buf == NULL) {
+        GATT_TRACE_ERROR ("%s failed to allocate buffer (%u)\n", __func__, len);
+        return GATT_NO_RESOURCES;
+    }
+
+    fill_database_info(data_buf);
+
+    // reverse database info
+    for (i = 0, j = len-1; i < j; i++, j--) {
+        tmp = data_buf[i];
+        data_buf[i] = data_buf[j];
+        data_buf[j] = tmp;
+    }
+
+#if SMP_INCLUDED == TRUE
+    BT_OCTET16 key = {0};
+    aes_cipher_msg_auth_code(key, data_buf, len, 16, hash);
+    //ESP_LOG_BUFFER_HEX("db hash", hash, BT_OCTET16_LEN);
+#else
+    // TODO
+    GATT_TRACE_ERROR("%s SMP disabled", __func__);
+#endif
+
+    osi_free(data_buf);
+    return GATT_SUCCESS;
+}
+#endif  /* BLE_INCLUDED == TRUE && GATTS_INCLUDED == TRUE */