From 55550e4ea4f4c0245d12323d7e15b22ae426d7d5 Mon Sep 17 00:00:00 2001
From: ENGO150 <v.smejkal06@gmail.com>
Date: Fri, 23 Feb 2024 10:25:47 +0100
Subject: [PATCH] defined why2_chat_generate_keys fn

and guess what! it doesn't save the keys, yet :dd
---
 src/chat/crypto.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/src/chat/crypto.c b/src/chat/crypto.c
index 742266d..72612b7 100644
--- a/src/chat/crypto.c
+++ b/src/chat/crypto.c
@@ -21,6 +21,8 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 #include <stdio.h>
 #include <sys/random.h>
 
+#include <why2/misc.h>
+
 #include <gmp.h>
 
 //LOCAL
@@ -43,4 +45,33 @@ void generate_prime(mpz_t x)
 
     //DEALLOCATION
     gmp_randclear(state);
+}
+
+//GLOBAL
+void why2_chat_generate_keys(void)
+{
+    //VARIABLES
+    mpz_t p, q, e, d, n, phi_n, buffer_1, buffer_2;
+    mpz_inits(p, q, e, d, n, phi_n, buffer_1, buffer_2, NULL);
+
+    //GENERATE PRIMES
+    generate_prime(p);
+    generate_prime(q);
+
+    //SET e
+    mpz_set_ui(e, 65537);
+
+    //GET n
+    mpz_mul(n, p, q);
+
+    //GET phi
+    mpz_sub_ui(buffer_1, p, 1);
+    mpz_sub_ui(buffer_2, q, 1);
+    mpz_mul(phi_n, buffer_1, buffer_2);
+
+    //COUNT d
+    mpz_invert(d, e, phi_n);
+
+    //DEALLOCATION
+    mpz_clears(p, q, e, d, n, phi_n, buffer_1, buffer_2, NULL);
 }
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