Оно работает!

Почищу код позже...

src/utils.rs

@@ -0,0 +1,59 @@
+use std::{fs::File, io::Read};
+
+use rand::{distributions::Alphanumeric, thread_rng, Rng};
+use ring::digest::{self, digest};
+use uuid::Uuid;
+use base64::prelude::*;
+
+
+// Кор функции
+pub fn rand() -> [u8; 50] {
+    let mut rng = thread_rng();
+    let distr = rand::distributions::Uniform::new_inclusive(0, 255);
+    let mut nums: [u8; 50] = [0u8; 50];
+    for x in &mut nums {
+        *x = rng.sample(distr);
+    }
+    nums
+}
+
+pub fn bytes_into_string(code: &[u8]) -> String {
+    code.iter().map(|byte| format!("{:02x}", byte)).collect::<String>()
+}
+// Конец кор функций
+
+
+pub fn _generate_hex_string(length: usize) -> String { // FIXME: Variable doesn't using!
+    let rng = thread_rng();
+    let random_bytes: Vec<u8> = rng
+        .sample_iter(&Alphanumeric)
+        .take(length / 2)
+        .collect();
+
+    hex::encode(random_bytes)
+}
+
+pub fn format_uuid(uuid: Uuid) -> String {
+    // let uuid = Uuid::parse_str(&uuid)?; TODO: Вероятно format_uuid стоит убрать
+        // .map_err(|_| tide::Error::from_str(StatusCode::InternalServerError, "Failed to parse UUID"))?;
+    uuid.as_hyphenated().to_string()
+}
+
+pub fn calculate_file_sha256(file_path: &str) -> Result<String, std::io::Error> {
+    // Read the file content
+    let mut file = File::open(file_path)?;
+    let mut content = Vec::new();
+    file.read_to_end(&mut content)?;
+
+    // Convert the content to base64
+    let base64_content = BASE64_STANDARD.encode(&content);
+
+    // Calculate the SHA-256 hash of the base64 string
+    let binding = digest(&digest::SHA256, base64_content.as_bytes());
+    let hash = binding.as_ref();
+
+    // Convert the hash to a hexadecimal string
+    let hex_hash = bytes_into_string(hash);
+
+    Ok(hex_hash)
+}