defined why2_chat_rsa_pub_encrypt

pog

src/chat/crypto.c

@@ -168,4 +168,28 @@ char *why2_get_chat_modulus(void)
 char *why2_get_chat_d(void)
 {
     return rsa_d;
+}
+
+char *why2_chat_rsa_pub_encrypt(long to_encrypt)
+{
+    //VARIABLES
+    char *output;
+    mpz_t m, c, n, e;
+    mpz_init(c);
+
+    //GET ALL STUFF
+    mpz_init_set_si(m, to_encrypt);
+    mpz_init_set_str(n, why2_get_chat_modulus(), WHY2_CHAT_KEY_BASE);
+    mpz_init_set_si(e, WHY2_CHAT_RSA_EXPONENT);
+
+    //ENCRYPT MESSAGE
+    mpz_powm(c, m, e, n);
+
+    output = why2_malloc(mpz_sizeinbase(c, WHY2_CHAT_KEY_BASE) + 2); //ALLOCATE OUTPUT
+    mpz_get_str(output, WHY2_CHAT_KEY_BASE, c); //GET OUTPUT
+
+    //DEALLOCATION
+    mpz_clears(m, c, n, e, NULL);
+
+    return output;
 }