Found cryptography library that was very easy to install.

Have hashing and verification functs ready.

encrypt.cpp

@@ -0,0 +1,35 @@
+#include "headers/encrypt.h"
+
+
+string hash_password(string password) {
+    /*
+    Passing strings and converting to char* because I do not want to be forced
+    to use char * whenever I want to call the function. Low level stuff in the
+    function, the least possible low level stuff outside.
+     */
+    const char* password_ = password.c_str();
+    char hashed_password_[crypto_pwhash_STRBYTES];
+    int memory_limit = 1.28e+8; // 1.28 e+8 = 128 e6 = 128 mb
+    int cpu_limit = 2;          // this is n_threads
+
+    int result = crypto_pwhash_str(hashed_password_,
+                                   password_,
+                                   strlen(password_),
+                                   cpu_limit,
+                                   memory_limit);
+    string hashed_password{hashed_password_};
+
+    return hashed_password;
+}
+
+bool verify_password(string hashed_password, string unhashed_password) {
+    const char* password_ = unhashed_password.c_str();
+    const char* hashed_password_ = hashed_password.c_str();
+
+    if (crypto_pwhash_str_verify(
+            hashed_password_, password_, strlen(password_)) != 0) {
+        return false;
+    } else {
+        return true;
+    }
+}