diff --git a/app/zadanie01.js b/app/zadanie01.js
index 842f75e..7c7fe5e 100644
--- a/app/zadanie01.js
+++ b/app/zadanie01.js
@@ -1,3 +1,38 @@
+const crypto = require('crypto');
+
 const MY_PWD_HASH = '5dca0fc4e306d92b2077ad85e7c4bd87a3e8648e';
 
-//Twój kod
\ No newline at end of file
+const hashArr = ['sha256', 'sha512', 'md5' , 'rmd160'];
+
+const texts = ['??TegoHasła',
+'CodersLab',
+'Node.js Szyfruje Pliki',
+'Zaźółć Gęślą Jaźń',
+'Moje Haslo 1@3!',
+'111#$((@)n',
+'Dzisiaj Szyfruje 83']
+
+let unscript = () => {
+
+    let hashAlgoritm = '';
+    let hash = '';
+
+    for(index in hashArr){
+        hashAlgoritm = hashArr[index];
+         
+        for(index in texts){
+
+        hash = crypto.createHmac(hashAlgoritm, texts[index]).digest('hex');
+
+            if(hash === MY_PWD_HASH){
+
+                console.log(`Answer: ${texts[index]}`);
+            }
+
+        }
+
+    }
+}
+unscript();
+
+
diff --git a/app/zadanieDnia1.js b/app/zadanieDnia1.js
index 8c20173..68b9959 100644
--- a/app/zadanieDnia1.js
+++ b/app/zadanieDnia1.js
@@ -1 +1,34 @@
-//Twój kod
\ No newline at end of file
+const fs = require('fs');
+const crypto = require('crypto');
+const exerHash = '4f7ae6569b55cb6275423ca1cdf31475e607da1d5204c110a58fb480c96e6eca'
+
+let read = (filePath) => {
+
+    return new Promise((resolve, reject) => {
+
+        fs.readFile(filePath, 'utf-8', (err, data) => {
+            if (err === null){
+                resolve(data)
+            } else {
+                throw err;
+            }
+        });
+    });    
+}
+
+let hashText = (text) => {
+    hash = crypto.createHmac('sha256', text).digest('hex');
+    console.log(hash);
+}
+
+
+let filePath = '';
+
+process.argv.forEach((val, index) => {
+    
+    if(index === 2){
+        filePath = val;
+        read(filePath).then((data) => { hashText(data) } );
+    };
+    
+});
\ No newline at end of file
diff --git a/app/zadanieDnia2.js b/app/zadanieDnia2.js
index 85846f4..a70b281 100644
--- a/app/zadanieDnia2.js
+++ b/app/zadanieDnia2.js
@@ -1,3 +1,41 @@
+const crypto = require('crypto');
+
 const ENCRYPTED_TEXT = '4f9fa8f98650091c4910f5b597773c0a48278cfb001fe4eb3ff47ada85cbf0ed3dc17016b031e1459e6e4d9b001ab6e102c11e834a98dce9530c9668c47b76ee6f09d075d19a38e48b415e067c6ddcfad0d3526c405a4f4f2fb1e7502f303c40';
 
-//Twój kod
\ No newline at end of file
+const text = 'Pobawmy się jak komputerowy Detektyw';
+
+const algorithm = ['aes192', 'aes-256-cbc', 'aes-256-ecb'];
+
+const getPassword = (text) => {
+    let textArr = text.split(' ');
+    let pass = '';
+
+    for(index in textArr){
+        let word = textArr[index];
+        pass += word[0] + word[word.length - 1];
+    }
+    return pass;
+}
+
+let pass = getPassword(text);
+
+const decodeText = (encodedText, password, algorithm) => {
+
+    for(index in algorithm){
+        const decipher = crypto.createDecipher(algorithm[index], password);
+        let decrypted = decipher.update(encodedText, 'hex', 'utf8');
+
+        try {
+            decrypted += decipher.final('utf8');
+            console.log(decrypted);
+        } catch (err) {
+            console.log(`Wystąpił błąd ${err.message}`);
+        }
+        
+    }
+    
+}
+
+decodeText(ENCRYPTED_TEXT, pass, algorithm);
+
+