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Add _init() and _free() for cipher modules

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This commit is contained in:
Paul Bakker
2014-06-18 11:12:03 +02:00
parent 0464dd9357
commit c7ea99af4f
17 changed files with 375 additions and 61 deletions
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29
library/xtea.c
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@ -41,6 +41,11 @@
#if !defined(POLARSSL_XTEA_ALT)
/* Implementation that should never be optimized out by the compiler */
static void polarssl_zeroize( void *v, size_t n ) {
volatile unsigned char *p = v; while( n-- ) *p++ = 0;
}
/*
* 32-bit integer manipulation macros (big endian)
*/
@ -64,6 +69,19 @@
}
#endif
void xtea_init( xtea_context *ctx )
{
memset( ctx, 0, sizeof( xtea_context ) );
}
void xtea_free( xtea_context *ctx )
{
if( ctx == NULL )
return;
polarssl_zeroize( ctx, sizeof( xtea_context ) );
}
/*
* XTEA key schedule
*/
@ -223,10 +241,11 @@ static const unsigned char xtea_test_ct[6][8] =
*/
int xtea_self_test( int verbose )
{
int i;
int i, ret = 0;
unsigned char buf[8];
xtea_context ctx;
xtea_init( &ctx );
for( i = 0; i < 6; i++ )
{
if( verbose != 0 )
@ -242,7 +261,8 @@ int xtea_self_test( int verbose )
if( verbose != 0 )
polarssl_printf( "failed\n" );
return( 1 );
ret = 1;
goto exit;
}
if( verbose != 0 )
@ -252,7 +272,10 @@ int xtea_self_test( int verbose )
if( verbose != 0 )
polarssl_printf( "\n" );
return( 0 );
exit:
xtea_free( &ctx );
return( ret );
}
#endif /* POLARSSL_SELF_TEST */