database functions

src/hashing.cpp

@@ -1,6 +1,9 @@
 #include <crypt.h>
 #include <stdexcept>
 #include "hashing.hpp"
+#include <random>
+#include <sstream>
+#include <iomanip>
 
 std::string hashing::GenerateSetting(unsigned long cost) {
     // "$y$" is the yescrypt prefix
@@ -24,4 +27,18 @@ bool hashing::VerifyPassword(const std::string& password, const std::string& sto
     if (!result || result[0] == '*')
         return false;
     return stored_hash == result;
+}
+
+std::string hashing::generate_token(size_t bytes) {
+    std::random_device rd;
+    std::string token;
+    token.reserve(bytes * 2);
+
+    std::uniform_int_distribution<uint8_t> dist(0, 255);
+    for (size_t i = 0; i < bytes; ++i) {
+        std::ostringstream ss;
+        ss << std::hex << std::setw(2) << std::setfill('0') << (int)dist(rd);
+        token += ss.str();
+    }
+    return token;
 }