From c4dabb4b5079a24b5ef653aa8752cc3cb01fafb2 Mon Sep 17 00:00:00 2001
From: SaltyMilk <soufiane.elmelcaoui@gmail.com>
Date: Fri, 3 Jul 2020 21:13:48 +0200
Subject: initial commit

---
 Makefile   |  23 +++++++++++++++++++++
 libtrand.a | Bin 0 -> 2728 bytes
 readme     |   2 ++
 trand.c    |  67 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 trand.h    |  16 +++++++++++++++
 5 files changed, 108 insertions(+)
 create mode 100644 Makefile
 create mode 100644 libtrand.a
 create mode 100644 readme
 create mode 100644 trand.c
 create mode 100644 trand.h

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..5d7f370
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,23 @@
+NAME= libtrand.a
+CC= gcc
+SRC= trand.c
+OBJ= $(SRC:.c=.o)
+CFLAG= -c -Wextra -Werror
+
+DEF_THREAD=19
+
+all: $(NAME)
+
+$(NAME): $(OBJ)
+	ar -rc $(NAME) $(OBJ)
+
+%.o: %.c
+	$(CC) $(CFLAG) -D DEF_THREAD=$(DEF_THREAD) $?
+
+clean:
+	rm -f $(OBJ)
+fclean:
+	rm -f $(OBJ) $(NAME)
+
+re : fclean all
+
diff --git a/libtrand.a b/libtrand.a
new file mode 100644
index 0000000..70cc0e2
Binary files /dev/null and b/libtrand.a differ
diff --git a/readme b/readme
new file mode 100644
index 0000000..544c8be
--- /dev/null
+++ b/readme
@@ -0,0 +1,2 @@
+Trand is more secure alternative to rand
+To compile: gcc your.c -L path_to_libtrand.a -ltrand
diff --git a/trand.c b/trand.c
new file mode 100644
index 0000000..54cdbb7
--- /dev/null
+++ b/trand.c
@@ -0,0 +1,67 @@
+#include "trand.h"
+
+int g_rfound;
+
+void *thread(void *ma)
+{
+	static pthread_mutex_t mutex;
+	pthread_mutex_t *m = &mutex;
+	int r;
+	for (unsigned long long i = 0; i < *(unsigned long long*)ma; i++)
+		r  = rand();
+	pthread_mutex_lock((pthread_mutex_t *)m);
+	if (g_rfound == -1)
+		g_rfound = r;
+	pthread_mutex_unlock((pthread_mutex_t *)m);
+	return (NULL);
+}
+
+/*
+** Control how many threads to create,
+** the more threads the more secure ntrand wil be
+*/
+
+int ntrand(unsigned long long n)
+{
+	g_rfound = -1;
+	pthread_t threads[n];
+	for (unsigned long long i = 0; i < n; i++)
+		pthread_create(&(threads[i]), NULL, thread, (void *)(&i));
+	for (unsigned long long i = 0; i < n; i++)
+		pthread_join(threads[i], NULL);
+	return (g_rfound);
+}
+
+/*
+** Basically rand but we seed with time for you, user-friendly
+*/
+
+int strand()
+{
+	g_rfound = -1;
+	srand(time(NULL));
+	pthread_mutex_t mutex;
+	pthread_t threads[DEF_NTHREAD];
+	for (unsigned long long i = 0; i < DEF_NTHREAD; i++)
+		pthread_create(&(threads[i]), NULL, thread, (void *)(&i));
+	for (unsigned long long i = 0; i < DEF_NTHREAD; i++)
+		pthread_join(threads[i], NULL);
+	return (g_rfound);
+}
+
+
+/*
+* In this version you are responsable for seeding rand()
+*/
+
+int trand()
+{
+	g_rfound = -1;
+	pthread_mutex_t mutex;
+	pthread_t threads[DEF_NTHREAD];
+	for (unsigned long long i = 0; i < DEF_NTHREAD; i++)
+		pthread_create(&(threads[i]), NULL, thread, (void *)(&i));
+	for (unsigned long long i = 0; i < DEF_NTHREAD; i++)
+		pthread_join(threads[i], NULL);
+	return (g_rfound);
+}
diff --git a/trand.h b/trand.h
new file mode 100644
index 0000000..7286c45
--- /dev/null
+++ b/trand.h
@@ -0,0 +1,16 @@
+#ifndef TRAND_H
+ #define TRAND_H
+
+  #ifndef DEF_NTHREAD
+	#define DEF_NTHREAD 4
+  #endif
+
+#include <pthread.h>
+#include <time.h>
+#include <stdlib.h>
+
+int ntrand(unsigned long long n);
+int trand();
+int strand();
+
+#endif
-- 
cgit