diff --git a/app/zadanie01.js b/app/zadanie01.js
index 842f75e..2947963 100644
--- a/app/zadanie01.js
+++ b/app/zadanie01.js
@@ -1,3 +1,14 @@
+const crypto = require('crypto');
 const MY_PWD_HASH = '5dca0fc4e306d92b2077ad85e7c4bd87a3e8648e';
+const passwords = ['??TegoHasła','CodersLab','Node.js Szyfruje Pliki','Zaźółć Gęślą Jaźń','Moje Haslo 1@3!','111#$((@)n','Dzisiaj Szyfruje 83']
+const algorithms = ['sha256', 'sha512', 'md5', 'rmd160'];
 
-//Twój kod
\ No newline at end of file
+passwords.forEach(pass => {
+  algorithms.forEach(code =>{
+    const cryptoPass = crypto.createHmac(code, pass).digest('hex');
+    if(cryptoPass === MY_PWD_HASH){
+      console.log('Hasło to: ' + pass);
+      console.log('Algorytm to: ' + code);
+    }
+  })
+});
diff --git a/app/zadanieDnia1.js b/app/zadanieDnia1.js
index 8c20173..a20795c 100644
--- a/app/zadanieDnia1.js
+++ b/app/zadanieDnia1.js
@@ -1 +1,11 @@
-//Twój kod
\ No newline at end of file
+const crypto = require('crypto');
+const fs = require('fs');
+process.argv.forEach((data, index) => {
+  if(index>1){
+    fs.readFile(data,'utf8', (err, data) =>{
+      if(err===null){
+        console.log(crypto.createHmac('sha256', data).digest('hex'));
+      } else{console.log('Wystąpił błąd odczytu pliku!',err);}
+    })
+  }
+})
diff --git a/app/zadanieDnia2.js b/app/zadanieDnia2.js
index 85846f4..5bc404c 100644
--- a/app/zadanieDnia2.js
+++ b/app/zadanieDnia2.js
@@ -1,3 +1,18 @@
 const ENCRYPTED_TEXT = '4f9fa8f98650091c4910f5b597773c0a48278cfb001fe4eb3ff47ada85cbf0ed3dc17016b031e1459e6e4d9b001ab6e102c11e834a98dce9530c9668c47b76ee6f09d075d19a38e48b415e067c6ddcfad0d3526c405a4f4f2fb1e7502f303c40';
-
-//Twój kod
\ No newline at end of file
+const crypto = require('crypto');
+let pass = [];
+const text = 'Pobawmy się jak komputerowy Detektyw'.split(' ').forEach(word =>{
+  pass.push(word[0] + word[word.length-1]);
+});
+pass = pass.join("");
+const algorithms = ['aes192', 'aes-256-cbc', 'aes-256-ecb'];
+algorithms.forEach(algorithm =>{
+    const decipher = crypto.createDecipher(algorithm, pass);
+    let decrypted = decipher.update(ENCRYPTED_TEXT, 'hex', 'utf8');
+    try{
+      decrypted += decipher.final('utf8');
+      console.log(decrypted);
+  } catch(e){
+      console.log('Nope, not this one!')
+  }
+})