diff --git a/app/zadanie01.js b/app/zadanie01.js
index 842f75e..e50b166 100644
--- a/app/zadanie01.js
+++ b/app/zadanie01.js
@@ -1,3 +1,14 @@
+const crypto = require('crypto');
 const MY_PWD_HASH = '5dca0fc4e306d92b2077ad85e7c4bd87a3e8648e';
 
-//Twój kod
\ No newline at end of file
+//Twój kod
+const passwordList = ['??TegoHasła','CodersLab','Node.js Szyfruje Pliki','Zaźółć Gęślą Jaźń','Moje Haslo 1@3!','111#$((@)n','Dzisiaj Szyfruje 83'];
+
+const algorithmList = ['sha256', 'sha512', 'md5', 'rmd160'];
+
+passwordList.forEach(password=>{
+    algorithmList.filter(algorithm=>{
+        const encrypted = crypto.createHmac(algorithm, password).digest('hex');
+        (encrypted === MY_PWD_HASH)&&console.log(`hasło to:  ${password} ; algorytm to: ${algorithm}`) 
+    })
+})
\ No newline at end of file
diff --git a/app/zadanieDnia1.js b/app/zadanieDnia1.js
index 8c20173..a5310ce 100644
--- a/app/zadanieDnia1.js
+++ b/app/zadanieDnia1.js
@@ -1 +1,16 @@
-//Twój kod
\ No newline at end of file
+//Twój kod
+const crypto = require('crypto');
+const fs = require('fs');
+
+fs.readFile(process.argv[2], 'utf8', (err, data) => {
+    if (err === null){ 
+        console.log('Poprawnie odczytano plik.');
+        let dataHashed = crypto.createHmac('sha256', data)
+        .digest('hex');
+    console.log('Wartość zakodowana:')
+    console.log(dataHashed); 
+
+    }else{ 
+        console.log('Błąd podczas odczytu pliku!', err);
+    }
+});
diff --git a/app/zadanieDnia2.js b/app/zadanieDnia2.js
index 85846f4..7be38c7 100644
--- a/app/zadanieDnia2.js
+++ b/app/zadanieDnia2.js
@@ -1,3 +1,28 @@
 const ENCRYPTED_TEXT = '4f9fa8f98650091c4910f5b597773c0a48278cfb001fe4eb3ff47ada85cbf0ed3dc17016b031e1459e6e4d9b001ab6e102c11e834a98dce9530c9668c47b76ee6f09d075d19a38e48b415e067c6ddcfad0d3526c405a4f4f2fb1e7502f303c40';
 
-//Twój kod
\ No newline at end of file
+//Twój kod
+const crypto = require('crypto');
+const algorithmList = ['aes192', 'aes-256-cbc', 'aes-256-ecb'];
+let password = "";
+const sentence = "Pobawmy się jak komputerowy Detektyw";
+let wordsList = [];
+wordsList = sentence.split(' ').filter(word=>{password = password + word[0] + word[word.length-1]})
+
+
+function decodeText(encodedText, password, algorithm){
+    const decipher = crypto.createDecipher(algorithm, password);
+    
+    let decrypted = decipher.update(encodedText, 'hex', 'utf8');
+    decrypted += decipher.final('utf8');
+    return decrypted;
+}
+
+
+algorithmList.forEach(algorithm=>{
+   try{
+       console.log(decodeText(ENCRYPTED_TEXT, password, algorithm))
+    }catch(err) {
+       return null
+    }
+   
+})