feat: decrypt ecdh works

src/util.rs

@@ -5,12 +5,29 @@ use base64::Engine;
 use base64::engine::general_purpose;
 use rust_util::{warning, XResult};
 
+pub const ENC_AES256_GCM_P256: &str = "aes256-gcm-p256";
 pub const TINY_ENC_FILE_EXT: &str = ".tinyenc";
 
+pub fn simple_kdf(input: &[u8]) -> Vec<u8> {
+    let input = hex::decode(sha256::digest(input)).unwrap();
+    let input = hex::decode(sha256::digest(input)).unwrap();
+    let input = hex::decode(sha256::digest(input)).unwrap();
+    let input = hex::decode(sha256::digest(input)).unwrap();
+    let input = hex::decode(sha256::digest(input)).unwrap();
+    let input = hex::decode(sha256::digest(input)).unwrap();
+    let input = hex::decode(sha256::digest(input)).unwrap();
+    let input = hex::decode(sha256::digest(input)).unwrap();
+    input
+}
+
 pub fn decode_base64(input: &str) -> XResult<Vec<u8>> {
     Ok(general_purpose::STANDARD.decode(input)?)
 }
 
+pub fn decode_base64_url_no_pad(input: &str) -> XResult<Vec<u8>> {
+    Ok(general_purpose::URL_SAFE_NO_PAD.decode(input)?)
+}
+
 pub fn read_number(hint: &str, from: usize, to: usize) -> usize {
     loop {
         print!("{} ({}-{}): ", hint, from, to);