- wrote diffie_hellman_t but not tested

Source/charon/utils/gmp_helper.c

@@ -130,6 +130,7 @@ static status_t init_prime (private_gmp_helper_t *this, mpz_t *prime, int bytes)
    	allocator_free(random_bytes.ptr);
    	random_bytes.ptr = NULL;   
 
+	/* composites are possible but should never occur */
 	mpz_nextprime (*(prime),*(prime));
 
 	return SUCCESS;

Source/charon/utils/gmp_helper.h

@@ -53,6 +53,8 @@ struct gmp_helper_s {
 	status_t (*init_prime) (gmp_helper_t *this, mpz_t *var, int bytes);
 	
 	/* Convert network form (binary bytes, big-endian) to mpz_t of gmp library.
+	 * 
+	 * mpz_t gets initialized in this function.
 	 * 
 	 * @param this				calling private_gmp_helper_t object
 	 * @param mpz_value 			pointer to a mpz_t value