types and db setup

src/hashing.cpp

@@ -0,0 +1,27 @@
+#include <crypt.h>
+#include <stdexcept>
+#include "hashing.hpp"
+
+std::string hashing::GenerateSetting(unsigned long cost) {
+    // "$y$" is the yescrypt prefix
+    const char* setting = crypt_gensalt("$y$", cost, nullptr, 0);
+    if (!setting)
+        throw std::runtime_error("crypt_gensalt() failed – yescrypt may not be supported");
+    return setting;
+}
+
+std::string hashing::HashPassword(const std::string& password, const std::string& setting) {
+    crypt_data data{};
+    const char* hash = crypt_r(password.c_str(), setting.c_str(), &data);
+    if (!hash || hash[0] == '*')
+        throw std::runtime_error("crypt_r() failed");
+    return hash;
+}
+
+bool hashing::VerifyPassword(const std::string& password, const std::string& stored_hash) {
+    crypt_data data{};
+    const char* result = crypt_r(password.c_str(), stored_hash.c_str(), &data);
+    if (!result || result[0] == '*')
+        return false;
+    return stored_hash == result;
+}