remove ogslib dependency from snow

* don't use ogslib specific header files
* don't use ogs_{malloc,free} but simply use the stack

Change-Id: I5604c594934b03d2fd83e1e465fc150fc542a475
changes/01/15201/3
Harald Welte 4 years ago committed by laforge
parent 135af53c48
commit 4a2bfcb77f
  1. 5
      mme/snow-3g.c
  2. 2
      mme/snow-3g.h

@ -381,7 +381,7 @@ void snow_3g_f8(u8 *key, u32 count, u32 bearer, u32 dir, u8 *data, u32 length)
int n = ( length + 31 ) / 32;
int i=0;
int lastbits = (8-(length%8)) % 8;
u32 *KS;
u32 KS[n];
/*Initialisation*/
/* Load the confidentiality key for SNOW 3G initialization as in section
@ -399,7 +399,6 @@ void snow_3g_f8(u8 *key, u32 count, u32 bearer, u32 dir, u8 *data, u32 length)
/* Run SNOW 3G algorithm to generate sequence of key stream bits KS*/
snow_3g_initialize(K,IV);
KS = (u32 *)ogs_malloc(4*n);
snow_3g_generate_key_stream(n,(u32*)KS);
/* Exclusive-OR the input data with keystream to generate the output bit
@ -412,8 +411,6 @@ void snow_3g_f8(u8 *key, u32 count, u32 bearer, u32 dir, u8 *data, u32 length)
data[4*i+3] ^= (u8) (KS[i] ) & 0xff;
}
ogs_free(KS);
/* zero last bits of data in case its length is not byte-aligned
this is an addition to the C reference code, which did not handle it */
if (lastbits)

@ -1,7 +1,7 @@
#ifndef __SNOW_3G__
#define __SNOW_3G__
#include "ogs-core.h"
#include <stdint.h>
#ifdef __cplusplus
extern "C" {

Loading…
Cancel
Save