diff --git a/homework/password-check/validation.cpp b/homework/password-check/validation.cpp
index a2f12ff3..b11d6218 100644
--- a/homework/password-check/validation.cpp
+++ b/homework/password-check/validation.cpp
@@ -1,2 +1,57 @@
 #include "validation.hpp"
-// TODO: Put implementations here
\ No newline at end of file
+#include <algorithm>
+#include <cctype>
+#include <vector>
+// TODO: Put implementations here
+bool doPasswordsMatch(std::string& pass1, std::string& pass2) {
+    if (pass1 == pass2) {
+        return true;
+    } else {
+        return false;
+    }
+}
+
+bool checkSpecialChar(std::string& pass) {
+    static const std::string special_chars = "!@#$%^&*()_-+=`~:;<,>.|";
+    return pass.find_first_of(special_chars) != std::string::npos;
+}
+
+int checkPasswordRules(std::string& pass) {
+    if (std::none_of(pass.begin(), pass.end(), ::isupper)) {
+        return (static_cast<int>(ErrorCode::PasswordNeedsAtLeastOneUppercaseLetter));
+    } else if (std::none_of(pass.begin(), pass.end(), ::isdigit)) {
+        return (static_cast<int>(ErrorCode::PasswordNeedsAtLeastOneNumber));
+    } else if (!checkSpecialChar(pass)) {
+        return (static_cast<int>(ErrorCode::PasswordNeedsAtLeastOneSpecialCharacter));
+    } else if (pass.length() < 9) {
+        return (static_cast<int>(ErrorCode::PasswordNeedsAtLeastNineCharacters));
+    } else {
+        return (static_cast<int>(ErrorCode::Ok));
+    }
+}
+
+int checkPassword(std::string& pass, std::string& repPass){
+    if (doPasswordsMatch(pass, repPass)){
+        return checkPasswordRules(pass);
+    }
+    else{
+        return (static_cast<int> (ErrorCode::PasswordsDoNotMatch));
+    }
+}
+
+std::string getErrorMessage(int errorNum){
+    static const std::vector<std::string> errorMessages = {
+     "Ok",
+     "Password needs to have at least nine characters",
+     "Password needs to have at least one number",
+     "Password needs to have at least one special character",
+     "Password needs to have at least one uppercase letter",
+     "Passwords do not match",
+    };
+    if (errorNum >= 0 && errorNum <= static_cast<int>(errorMessages.size())){
+        return errorMessages[errorNum];
+    }
+    else{
+        return "Unknown error";
+    }
+}
\ No newline at end of file
diff --git a/homework/password-check/validation.hpp b/homework/password-check/validation.hpp
index 85160868..ead034fc 100644
--- a/homework/password-check/validation.hpp
+++ b/homework/password-check/validation.hpp
@@ -1,2 +1,18 @@
+#pragma once
+#include <string>
 // TODO: I'm empty :) Put enum and function headers here.
-// Don't forget the header guard - #pragma once
\ No newline at end of file
+// Don't forget the header guard - #pragma once
+
+enum class ErrorCode{
+    Ok,
+    PasswordNeedsAtLeastNineCharacters,
+    PasswordNeedsAtLeastOneNumber,
+    PasswordNeedsAtLeastOneSpecialCharacter,
+    PasswordNeedsAtLeastOneUppercaseLetter,
+    PasswordsDoNotMatch
+};
+std::string getErrorMessage(int errorNum);
+bool doPasswordsMatch(std::string& pass1, std::string& pass2);
+int checkPasswordRules(std::string& pass);
+int checkPassword(std::string& pass, std::string repPass);
+bool checkSpecialChar(std::string& pass);
\ No newline at end of file