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🐛 std::hash was deterministic

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This commit is contained in:
EntireTwix 2021-04-12 20:01:32 -07:00
parent aead847df9
commit 8cb4702825
2 changed files with 8 additions and 7 deletions
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9
include/bank.hpp
View file

@ -2,6 +2,7 @@
#include <fstream>
#include <shared_mutex>
#include <vector>
#include <xxh3.h>
#include "parallel-hashmap/parallel_hashmap/phmap.h"
#include "user.hpp"
@ -53,7 +54,7 @@ public:
bool DelUser(const std::string &name, const std::string &attempt)
{
std::unique_lock<std::shared_mutex> lock{size_lock};
return users.erase_if(name, [&attempt](const User &u) { return (std::hash<std::string>{}(attempt) == u.password); });
return users.erase_if(name, [&attempt](const User &u) { return (XXH64(attempt.data(), attempt.size(), 0) == u.password); });
}
bool AdminDelUser(const std::string &name, const std::string &attempt)
{
@ -74,7 +75,7 @@ public:
bool state = false;
std::shared_lock<std::shared_mutex> lock{send_funds_l}; //because SendFunds requires 3 locking operations
users.modify_if(a_name, [&state, amount, &attempt](User &a) {
if (state = (a.balance >= amount) && (a.password == std::hash<std::string>{}(attempt)), state)
if (state = (a.balance >= amount) && (a.password == XXH64(attempt.data(), attempt.size(), 0)), state)
{
a.balance -= amount;
}
@ -125,7 +126,7 @@ public:
{
int_fast8_t res = -1;
users.if_contains(name, [&res, &attempt](const User &u) {
res = u.password == std::hash<std::string>{}(attempt);
res = u.password == XXH64(attempt.data(), attempt.size(), 0);
});
return res;
}
@ -133,7 +134,7 @@ public:
{
int_fast8_t res = -1;
users.modify_if(name, [&res, &attempt, &new_pass](User &u) {
res = (u.password == std::hash<std::string>{}(attempt));
res = (u.password == XXH64(attempt.data(), attempt.size(), 0));
if (res)
{
u.password = std::hash<std::string>{}(new_pass);

6
include/user.hpp
View file

@ -5,14 +5,14 @@
struct User
{
uint_fast32_t balance = 0;
size_t password;
uint_fast64_t password;
/**
* @brief User constructor
*
* @param init_pass initial password
*/
User(std::string &&init_pass) : password(std::hash<std::string>{}(init_pass)) {}
User(std::string &&init_pass) : password(XXH64(init_pass.data(), init_pass.size(), 0)) {}
/**
* @brief User Constructor for admins
@ -20,7 +20,7 @@ struct User
* @param init_bal initial balance
* @param init_pass initial password
*/
User(uint_fast32_t init_bal, std::string &&init_pass) : balance(init_bal), password(std::hash<std::string>{}(init_pass)) {}
User(uint_fast32_t init_bal, std::string &&init_pass) : balance(init_bal), password(XXH64(init_pass.data(), init_pass.size(), 0)) {}
Json::Value Serialize() const
{