diff --git a/homework/password-check/validation.cpp b/homework/password-check/validation.cpp
index a2f12ff3..57a7c848 100644
--- a/homework/password-check/validation.cpp
+++ b/homework/password-check/validation.cpp
@@ -1,2 +1,53 @@
 #include "validation.hpp"
-// TODO: Put implementations here
\ No newline at end of file
+#include <algorithm>
+#include <cctype>
+
+std::string getErrorMessage(ErrorCode error) {
+    switch (error) {
+    case ErrorCode::Ok:
+        return "Ok";
+
+    case ErrorCode::PasswordNeedsAtLeastNineCharacters:
+        return "Password needs to have at least nine characters";
+
+    case ErrorCode::PasswordNeedsAtLeastOneNumber:
+        return "Password needs to have at least one number";
+
+    case ErrorCode::PasswordNeedsAtLeastOneSpecialCharacter:
+        return "Password needs to have at least one special character";
+
+    case ErrorCode::PasswordNeedsAtLeastOneUppercaseLetter:
+        return "Password needs to have at least one uppercase letter";
+
+    case ErrorCode::PasswordsDoNotMatch:
+        return "Passwords do not match";
+    }
+    return "Undefined error";
+}
+
+bool doPasswordsMatch(std::string password1, std::string password2) {
+    return password1 == password2;
+}
+
+ErrorCode checkPasswordRules(std::string password) {
+    if (password.length() < 9) {
+        return ErrorCode::PasswordNeedsAtLeastNineCharacters;
+    }
+    if (!std::any_of(password.begin(), password.end(), [](unsigned char c) { return std::isdigit(c); })) {
+        return ErrorCode::PasswordNeedsAtLeastOneNumber;
+    }
+    if (!std::any_of(password.begin(), password.end(), [](unsigned char c) { return std::ispunct(c); })) {
+        return ErrorCode::PasswordNeedsAtLeastOneSpecialCharacter;
+    }
+    if (!std::any_of(password.begin(), password.end(), [](unsigned char c) { return std::isupper(c); })) {
+        return ErrorCode::PasswordNeedsAtLeastOneUppercaseLetter;
+    }
+    return ErrorCode::Ok;
+}
+
+ErrorCode checkPassword(std::string password1, std::string password2) {
+    if (doPasswordsMatch(password1, password2)) {
+        return checkPasswordRules(password1);
+    }
+    return ErrorCode::PasswordsDoNotMatch;
+}
\ No newline at end of file
diff --git a/homework/password-check/validation.hpp b/homework/password-check/validation.hpp
index 85160868..76d5e23e 100644
--- a/homework/password-check/validation.hpp
+++ b/homework/password-check/validation.hpp
@@ -1,2 +1,16 @@
-// TODO: I'm empty :) Put enum and function headers here.
-// Don't forget the header guard - #pragma once
\ No newline at end of file
+#pragma once
+#include <string>
+
+enum class ErrorCode {
+    Ok,
+    PasswordNeedsAtLeastNineCharacters,
+    PasswordNeedsAtLeastOneNumber,
+    PasswordNeedsAtLeastOneSpecialCharacter,
+    PasswordNeedsAtLeastOneUppercaseLetter,
+    PasswordsDoNotMatch
+};
+
+std::string getErrorMessage(ErrorCode error);
+bool doPasswordsMatch(std::string password1, std::string password2);
+ErrorCode checkPasswordRules(std::string password);
+ErrorCode checkPassword(std::string password1, std::string password2);