Skorp sub ghz add protocol (#581)

* SubGhz: Add Star Line protocol
* Rollback ReadMe changes
* SubGhz: add shared keystore for keeloq derived protocols.
* SubGhz: add missing key load routine

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>

lib/fl_subghz/subghz_keystore.c

@@ -0,0 +1,86 @@
+#include "subghz_keystore.h"
+
+#include <furi.h>
+#include <filesystem-api.h>
+
+#define FILE_BUFFER_SIZE 64
+
+struct SubGhzKeystore {
+    SubGhzKeyArray_t data;
+};
+
+SubGhzKeystore* subghz_keystore_alloc() {
+    SubGhzKeystore* instance = furi_alloc(sizeof(SubGhzKeystore));
+
+    SubGhzKeyArray_init(instance->data);
+
+    return instance;
+}
+
+void subghz_keystore_free(SubGhzKeystore* instance) {
+    furi_assert(instance);
+
+    for
+    M_EACH(manufacture_code, instance->data, SubGhzKeyArray_t) {
+        string_clear(manufacture_code->name);
+        manufacture_code->key = 0;
+    }
+    SubGhzKeyArray_clear(instance->data);
+
+    free(instance);
+}
+
+static void subghz_keystore_add_key(SubGhzKeystore* instance, const char* name, uint64_t key, uint16_t type) {
+    SubGhzKey* manufacture_code = SubGhzKeyArray_push_raw(instance->data);
+    string_init_set_str(manufacture_code->name, name);
+    manufacture_code->key = key;
+    manufacture_code->type = type;
+}
+
+static void subghz_keystore_process_line(SubGhzKeystore* instance, string_t line) {
+    uint64_t key = 0;
+    uint16_t type = 0;
+    char skey[17] = {0};
+    char name[65] = {0};
+    int ret = sscanf(string_get_cstr(line), "%16s:%hu:%64s", skey, &type, name);
+    key = strtoull(skey, NULL, 16);
+    if (ret == 3) {
+        subghz_keystore_add_key(instance, name, key, type);
+    } else {
+        printf("Failed to load line: %s\r\n", string_get_cstr(line));
+    }
+}
+
+void subghz_keystore_load(SubGhzKeystore* instance, const char* file_name) {
+    File manufacture_keys_file;
+    FS_Api* fs_api = furi_record_open("sdcard");
+    fs_api->file.open(&manufacture_keys_file, file_name, FSAM_READ, FSOM_OPEN_EXISTING);
+    string_t line;
+    string_init(line);
+    if(manufacture_keys_file.error_id == FSE_OK) {
+        printf("Loading manufacture keys file %s\r\n", file_name);
+        char buffer[FILE_BUFFER_SIZE];
+        uint16_t ret;
+        do {
+            ret = fs_api->file.read(&manufacture_keys_file, buffer, FILE_BUFFER_SIZE);
+            for (uint16_t i=0; i < ret; i++) {
+                if (buffer[i] == '\n' && string_size(line) > 0) {
+                    subghz_keystore_process_line(instance, line);
+                    string_clean(line);
+                } else {
+                    string_push_back(line, buffer[i]);
+                }
+            }
+        } while(ret > 0);
+    } else {
+        printf("Manufacture keys file is not found: %s\r\n", file_name);
+    }
+    string_clear(line);
+    fs_api->file.close(&manufacture_keys_file);
+    furi_record_close("sdcard");
+}
+
+SubGhzKeyArray_t* subghz_keystore_get_data(SubGhzKeystore* instance) {
+    furi_assert(instance);
+    return &instance->data;
+}