diff --git a/homework/password-check/validation.cpp b/homework/password-check/validation.cpp
index a2f12ff3..2fac7086 100644
--- a/homework/password-check/validation.cpp
+++ b/homework/password-check/validation.cpp
@@ -1,2 +1,35 @@
 #include "validation.hpp"
-// TODO: Put implementations here
\ No newline at end of file
+#include <algorithm>
+#include <cctype>
+
+auto getErrorMessage(const ErrorCode error) -> std::string_view {
+    return error_messages.at(error);
+}
+
+auto doPasswordsMatch(std::string_view lhs, std::string_view rhs) -> bool {
+    return lhs == rhs;
+}
+
+auto checkPasswordRules(std::string_view password) -> ErrorCode {
+    if (password.size() < MIN_PASSWORD_LEN) {
+        return ErrorCode::PasswordNeedsAtLeastNineCharacters;
+    }
+    if (std::none_of(password.begin(), password.end(), [](unsigned char c) { return std::isdigit(c); })) {
+        return ErrorCode::PasswordNeedsAtLeastOneNumber;
+    }
+    if (std::none_of(password.begin(), password.end(), [](unsigned char c) { return std::ispunct(c); })) {
+        return ErrorCode::PasswordNeedsAtLeastOneSpecialCharacter;
+    }
+    if (std::none_of(password.begin(), password.end(), [](unsigned char c) { return std::isupper(c); })) {
+        return ErrorCode::PasswordNeedsAtLeastOneUppercaseLetter;
+    }
+    return ErrorCode::Ok;
+}
+
+auto checkPassword(std::string_view lhs, std::string_view rhs) -> ErrorCode {
+    if (doPasswordsMatch(lhs, rhs)) {
+        return checkPasswordRules(lhs);
+    } else {
+        return ErrorCode::PasswordsDoNotMatch;
+    }
+}
diff --git a/homework/password-check/validation.hpp b/homework/password-check/validation.hpp
index 85160868..a3402b8f 100644
--- a/homework/password-check/validation.hpp
+++ b/homework/password-check/validation.hpp
@@ -1,2 +1,30 @@
-// 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 <map>
+#include <string_view>
+
+enum class ErrorCode {
+    Ok,
+    PasswordNeedsAtLeastNineCharacters,
+    PasswordNeedsAtLeastOneNumber,
+    PasswordNeedsAtLeastOneSpecialCharacter,
+    PasswordNeedsAtLeastOneUppercaseLetter,
+    PasswordsDoNotMatch
+};
+
+inline constexpr size_t MIN_PASSWORD_LEN = 9;
+
+inline const std::map<const ErrorCode, std::string_view> error_messages{
+    {ErrorCode::Ok, "Ok"},
+    {ErrorCode::PasswordNeedsAtLeastNineCharacters, "Password needs to have at least nine characters"},
+    {ErrorCode::PasswordNeedsAtLeastOneNumber, "Password needs to have at least one number"},
+    {ErrorCode::PasswordNeedsAtLeastOneSpecialCharacter, "Password needs to have at least one special character"},
+    {ErrorCode::PasswordNeedsAtLeastOneUppercaseLetter, "Password needs to have at least one uppercase letter"},
+    {ErrorCode::PasswordsDoNotMatch, "Passwords do not match"}};
+
+auto getErrorMessage(const ErrorCode error) -> std::string_view;
+
+auto doPasswordsMatch(std::string_view lhs, std::string_view rhs) -> bool;
+
+auto checkPasswordRules(std::string_view password) -> ErrorCode;
+
+auto checkPassword(std::string_view lhs, std::string_view rhs) -> ErrorCode;