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- Added simple SSL session cache implementation

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- Revamped session resumption handling
This commit is contained in:
Paul Bakker
2012-09-25 21:55:46 +00:00
parent 1a0f552030
commit 0a59707523
18 changed files with 408 additions and 372 deletions
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99
programs/ssl/ssl_server.c
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@ -45,6 +45,10 @@
#include "polarssl/net.h"
#include "polarssl/error.h"
#if defined(POLARSSL_SSL_CACHE_C)
#include "polarssl/ssl_cache.h"
#endif
#define HTTP_RESPONSE \
"HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n" \
"<h2>PolarSSL Test Server</h2>\r\n" \
@ -153,80 +157,6 @@ void my_debug( void *ctx, int level, const char *str )
}
}
/*
* These session callbacks use a simple chained list
* to store and retrieve the session information.
*/
ssl_session *s_list_1st = NULL;
ssl_session *cur, *prv;
static int my_get_session( ssl_context *ssl )
{
time_t t = time( NULL );
if( ssl->resume == 0 )
return( 1 );
cur = s_list_1st;
prv = NULL;
while( cur != NULL )
{
prv = cur;
cur = cur->next;
if( ssl->timeout != 0 && (int) ( t - prv->start ) > ssl->timeout )
continue;
if( ssl->session->ciphersuite != prv->ciphersuite ||
ssl->session->length != prv->length )
continue;
if( memcmp( ssl->session->id, prv->id, prv->length ) != 0 )
continue;
memcpy( ssl->session->master, prv->master, 48 );
return( 0 );
}
return( 1 );
}
static int my_set_session( ssl_context *ssl )
{
time_t t = time( NULL );
cur = s_list_1st;
prv = NULL;
while( cur != NULL )
{
if( ssl->timeout != 0 && (int) ( t - cur->start ) > ssl->timeout )
break; /* expired, reuse this slot */
if( memcmp( ssl->session->id, cur->id, cur->length ) == 0 )
break; /* client reconnected */
prv = cur;
cur = cur->next;
}
if( cur == NULL )
{
cur = (ssl_session *) malloc( sizeof( ssl_session ) );
if( cur == NULL )
return( 1 );
if( prv == NULL )
s_list_1st = cur;
else prv->next = cur;
}
memcpy( cur, ssl->session, sizeof( ssl_session ) );
return( 0 );
}
#if !defined(POLARSSL_BIGNUM_C) || !defined(POLARSSL_CERTS_C) || \
!defined(POLARSSL_ENTROPY_C) || !defined(POLARSSL_SSL_TLS_C) || \
!defined(POLARSSL_SSL_SRV_C) || !defined(POLARSSL_NET_C) || \
@ -254,14 +184,17 @@ int main( int argc, char *argv[] )
entropy_context entropy;
ctr_drbg_context ctr_drbg;
ssl_context ssl;
ssl_session ssn;
x509_cert srvcert;
rsa_context rsa;
((void) argc);
((void) argv);
memset( &ssl, 0, sizeof( ssl_context ) );
#if defined(POLARSSL_SSL_CACHE_C)
ssl_cache_context cache;
ssl_cache_init( &cache );
#endif
/*
* 1. Load the certificates and private RSA key
@ -351,13 +284,12 @@ int main( int argc, char *argv[] )
ssl_set_rng( &ssl, ctr_drbg_random, &ctr_drbg );
ssl_set_dbg( &ssl, my_debug, stdout );
ssl_set_scb( &ssl, my_get_session,
my_set_session );
#if defined(POLARSSL_SSL_CACHE_C)
ssl_set_session_cache( &ssl, ssl_cache_get, &cache,
ssl_cache_set, &cache );
#endif
ssl_set_ciphersuites( &ssl, my_ciphersuites );
ssl_set_session( &ssl, 1, 0, &ssn );
memset( &ssn, 0, sizeof( ssl_session ) );
ssl_set_ca_chain( &ssl, srvcert.next, NULL, NULL );
ssl_set_own_cert( &ssl, &srvcert, &rsa );
@ -527,9 +459,10 @@ exit:
net_close( client_fd );
x509_free( &srvcert );
rsa_free( &rsa );
ssl_session_free( &ssn );
ssl_session_free( s_list_1st );
ssl_free( &ssl );
#if defined(POLARSSL_SSL_CACHE_C)
ssl_cache_free( &cache );
#endif
#if defined(_WIN32)
printf( " Press Enter to exit this program.\n" );