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Save RAM when only a few ciphersuites are defined

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This commit is contained in:
Manuel Pégourié-Gonnard 2014-06-30 17:38:22 +02:00
parent c27807dd1e
commit 791684c058
1 changed files with 13 additions and 12 deletions
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25
library/ssl_ciphersuites.c
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@ -260,10 +260,6 @@ static const int ciphersuite_preference[] =
0 0
}; };
#define MAX_CIPHERSUITES 176
static int supported_ciphersuites[MAX_CIPHERSUITES];
static int supported_init = 0;
static const ssl_ciphersuite_t ciphersuite_definitions[] = static const ssl_ciphersuite_t ciphersuite_definitions[] =
{ {
#if defined(POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) #if defined(POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
@ -1679,6 +1675,11 @@ static const ssl_ciphersuite_t ciphersuite_definitions[] =
{ 0, "", 0, 0, 0, 0, 0, 0, 0, 0 } { 0, "", 0, 0, 0, 0, 0, 0, 0, 0 }
}; };
#define MAX_CIPHERSUITES sizeof( ciphersuite_definitions ) / \
sizeof( ciphersuite_definitions[0] )
static int supported_ciphersuites[MAX_CIPHERSUITES];
static int supported_init = 0;
const int *ssl_list_ciphersuites( void ) const int *ssl_list_ciphersuites( void )
{ {
/* /*
@ -1687,21 +1688,21 @@ const int *ssl_list_ciphersuites( void )
*/ */
if( supported_init == 0 ) if( supported_init == 0 )
{ {
const int *p = ciphersuite_preference; const int *p;
int *q = supported_ciphersuites; int *q;
size_t i;
size_t max = sizeof(supported_ciphersuites) / sizeof(int);
for( i = 0; i < max - 1 && p[i] != 0; i++ ) for( p = ciphersuite_preference, q = supported_ciphersuites;
*p != 0 && q < supported_ciphersuites + MAX_CIPHERSUITES - 1;
p++ )
{ {
#if defined(POLARSSL_REMOVE_ARC4_CIPHERSUITES) #if defined(POLARSSL_REMOVE_ARC4_CIPHERSUITES)
const ssl_ciphersuite_t *cs_info; const ssl_ciphersuite_t *cs_info;
if( ( cs_info = ssl_ciphersuite_from_id( p[i] ) ) != NULL && if( ( cs_info = ssl_ciphersuite_from_id( *p ) ) != NULL &&
cs_info->cipher != POLARSSL_CIPHER_ARC4_128 ) cs_info->cipher != POLARSSL_CIPHER_ARC4_128 )
#else #else
if( ssl_ciphersuite_from_id( p[i] ) != NULL ) if( ssl_ciphersuite_from_id( *p ) != NULL )
#endif #endif
*(q++) = p[i]; *(q++) = *p;
} }
*q = 0; *q = 0;