diff options
Diffstat (limited to 'FreeRTOS-Labs/Source/mbedtls/library/ssl_cache.c')
| -rw-r--r-- | FreeRTOS-Labs/Source/mbedtls/library/ssl_cache.c | 353 |
1 files changed, 353 insertions, 0 deletions
diff --git a/FreeRTOS-Labs/Source/mbedtls/library/ssl_cache.c b/FreeRTOS-Labs/Source/mbedtls/library/ssl_cache.c new file mode 100644 index 000000000..036b468c4 --- /dev/null +++ b/FreeRTOS-Labs/Source/mbedtls/library/ssl_cache.c @@ -0,0 +1,353 @@ +/*
+ * SSL session cache implementation
+ *
+ * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * This file is part of mbed TLS (https://tls.mbed.org)
+ */
+/*
+ * These session callbacks use a simple chained list
+ * to store and retrieve the session information.
+ */
+
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "mbedtls/config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+#if defined(MBEDTLS_SSL_CACHE_C)
+
+#if defined(MBEDTLS_PLATFORM_C)
+#include "mbedtls/platform.h"
+#else
+#include <stdlib.h>
+#define mbedtls_calloc calloc
+#define mbedtls_free free
+#endif
+
+#include "mbedtls/ssl_cache.h"
+#include "mbedtls/ssl_internal.h"
+
+#include <string.h>
+
+void mbedtls_ssl_cache_init( mbedtls_ssl_cache_context *cache )
+{
+ memset( cache, 0, sizeof( mbedtls_ssl_cache_context ) );
+
+ cache->timeout = MBEDTLS_SSL_CACHE_DEFAULT_TIMEOUT;
+ cache->max_entries = MBEDTLS_SSL_CACHE_DEFAULT_MAX_ENTRIES;
+
+#if defined(MBEDTLS_THREADING_C)
+ mbedtls_mutex_init( &cache->mutex );
+#endif
+}
+
+int mbedtls_ssl_cache_get( void *data, mbedtls_ssl_session *session )
+{
+ int ret = 1;
+#if defined(MBEDTLS_HAVE_TIME)
+ mbedtls_time_t t = mbedtls_time( NULL );
+#endif
+ mbedtls_ssl_cache_context *cache = (mbedtls_ssl_cache_context *) data;
+ mbedtls_ssl_cache_entry *cur, *entry;
+
+#if defined(MBEDTLS_THREADING_C)
+ if( mbedtls_mutex_lock( &cache->mutex ) != 0 )
+ return( 1 );
+#endif
+
+ cur = cache->chain;
+ entry = NULL;
+
+ while( cur != NULL )
+ {
+ entry = cur;
+ cur = cur->next;
+
+#if defined(MBEDTLS_HAVE_TIME)
+ if( cache->timeout != 0 &&
+ (int) ( t - entry->timestamp ) > cache->timeout )
+ continue;
+#endif
+
+ if( session->ciphersuite != entry->session.ciphersuite ||
+ session->compression != entry->session.compression ||
+ session->id_len != entry->session.id_len )
+ continue;
+
+ if( memcmp( session->id, entry->session.id,
+ entry->session.id_len ) != 0 )
+ continue;
+
+ ret = mbedtls_ssl_session_copy( session, &entry->session );
+ if( ret != 0 )
+ {
+ ret = 1;
+ goto exit;
+ }
+
+#if defined(MBEDTLS_X509_CRT_PARSE_C) && \
+ defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
+ /*
+ * Restore peer certificate (without rest of the original chain)
+ */
+ if( entry->peer_cert.p != NULL )
+ {
+ /* `session->peer_cert` is NULL after the call to
+ * mbedtls_ssl_session_copy(), because cache entries
+ * have the `peer_cert` field set to NULL. */
+
+ if( ( session->peer_cert = mbedtls_calloc( 1,
+ sizeof(mbedtls_x509_crt) ) ) == NULL )
+ {
+ ret = 1;
+ goto exit;
+ }
+
+ mbedtls_x509_crt_init( session->peer_cert );
+ if( mbedtls_x509_crt_parse( session->peer_cert, entry->peer_cert.p,
+ entry->peer_cert.len ) != 0 )
+ {
+ mbedtls_free( session->peer_cert );
+ session->peer_cert = NULL;
+ ret = 1;
+ goto exit;
+ }
+ }
+#endif /* MBEDTLS_X509_CRT_PARSE_C && MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
+
+ ret = 0;
+ goto exit;
+ }
+
+exit:
+#if defined(MBEDTLS_THREADING_C)
+ if( mbedtls_mutex_unlock( &cache->mutex ) != 0 )
+ ret = 1;
+#endif
+
+ return( ret );
+}
+
+int mbedtls_ssl_cache_set( void *data, const mbedtls_ssl_session *session )
+{
+ int ret = 1;
+#if defined(MBEDTLS_HAVE_TIME)
+ mbedtls_time_t t = mbedtls_time( NULL ), oldest = 0;
+ mbedtls_ssl_cache_entry *old = NULL;
+#endif
+ mbedtls_ssl_cache_context *cache = (mbedtls_ssl_cache_context *) data;
+ mbedtls_ssl_cache_entry *cur, *prv;
+ int count = 0;
+
+#if defined(MBEDTLS_THREADING_C)
+ if( ( ret = mbedtls_mutex_lock( &cache->mutex ) ) != 0 )
+ return( ret );
+#endif
+
+ cur = cache->chain;
+ prv = NULL;
+
+ while( cur != NULL )
+ {
+ count++;
+
+#if defined(MBEDTLS_HAVE_TIME)
+ if( cache->timeout != 0 &&
+ (int) ( t - cur->timestamp ) > cache->timeout )
+ {
+ cur->timestamp = t;
+ break; /* expired, reuse this slot, update timestamp */
+ }
+#endif
+
+ if( memcmp( session->id, cur->session.id, cur->session.id_len ) == 0 )
+ break; /* client reconnected, keep timestamp for session id */
+
+#if defined(MBEDTLS_HAVE_TIME)
+ if( oldest == 0 || cur->timestamp < oldest )
+ {
+ oldest = cur->timestamp;
+ old = cur;
+ }
+#endif
+
+ prv = cur;
+ cur = cur->next;
+ }
+
+ if( cur == NULL )
+ {
+#if defined(MBEDTLS_HAVE_TIME)
+ /*
+ * Reuse oldest entry if max_entries reached
+ */
+ if( count >= cache->max_entries )
+ {
+ if( old == NULL )
+ {
+ ret = 1;
+ goto exit;
+ }
+
+ cur = old;
+ }
+#else /* MBEDTLS_HAVE_TIME */
+ /*
+ * Reuse first entry in chain if max_entries reached,
+ * but move to last place
+ */
+ if( count >= cache->max_entries )
+ {
+ if( cache->chain == NULL )
+ {
+ ret = 1;
+ goto exit;
+ }
+
+ cur = cache->chain;
+ cache->chain = cur->next;
+ cur->next = NULL;
+ prv->next = cur;
+ }
+#endif /* MBEDTLS_HAVE_TIME */
+ else
+ {
+ /*
+ * max_entries not reached, create new entry
+ */
+ cur = mbedtls_calloc( 1, sizeof(mbedtls_ssl_cache_entry) );
+ if( cur == NULL )
+ {
+ ret = 1;
+ goto exit;
+ }
+
+ if( prv == NULL )
+ cache->chain = cur;
+ else
+ prv->next = cur;
+ }
+
+#if defined(MBEDTLS_HAVE_TIME)
+ cur->timestamp = t;
+#endif
+ }
+
+#if defined(MBEDTLS_X509_CRT_PARSE_C) && \
+ defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
+ /*
+ * If we're reusing an entry, free its certificate first
+ */
+ if( cur->peer_cert.p != NULL )
+ {
+ mbedtls_free( cur->peer_cert.p );
+ memset( &cur->peer_cert, 0, sizeof(mbedtls_x509_buf) );
+ }
+#endif /* MBEDTLS_X509_CRT_PARSE_C && MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
+
+ /* Copy the entire session; this temporarily makes a copy of the
+ * X.509 CRT structure even though we only want to store the raw CRT.
+ * This inefficiency will go away as soon as we implement on-demand
+ * parsing of CRTs, in which case there's no need for the `peer_cert`
+ * field anymore in the first place, and we're done after this call. */
+ ret = mbedtls_ssl_session_copy( &cur->session, session );
+ if( ret != 0 )
+ {
+ ret = 1;
+ goto exit;
+ }
+
+#if defined(MBEDTLS_X509_CRT_PARSE_C) && \
+ defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
+ /* If present, free the X.509 structure and only store the raw CRT data. */
+ if( cur->session.peer_cert != NULL )
+ {
+ cur->peer_cert.p =
+ mbedtls_calloc( 1, cur->session.peer_cert->raw.len );
+ if( cur->peer_cert.p == NULL )
+ {
+ ret = 1;
+ goto exit;
+ }
+
+ memcpy( cur->peer_cert.p,
+ cur->session.peer_cert->raw.p,
+ cur->session.peer_cert->raw.len );
+ cur->peer_cert.len = session->peer_cert->raw.len;
+
+ mbedtls_x509_crt_free( cur->session.peer_cert );
+ mbedtls_free( cur->session.peer_cert );
+ cur->session.peer_cert = NULL;
+ }
+#endif /* MBEDTLS_X509_CRT_PARSE_C && MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
+
+ ret = 0;
+
+exit:
+#if defined(MBEDTLS_THREADING_C)
+ if( mbedtls_mutex_unlock( &cache->mutex ) != 0 )
+ ret = 1;
+#endif
+
+ return( ret );
+}
+
+#if defined(MBEDTLS_HAVE_TIME)
+void mbedtls_ssl_cache_set_timeout( mbedtls_ssl_cache_context *cache, int timeout )
+{
+ if( timeout < 0 ) timeout = 0;
+
+ cache->timeout = timeout;
+}
+#endif /* MBEDTLS_HAVE_TIME */
+
+void mbedtls_ssl_cache_set_max_entries( mbedtls_ssl_cache_context *cache, int max )
+{
+ if( max < 0 ) max = 0;
+
+ cache->max_entries = max;
+}
+
+void mbedtls_ssl_cache_free( mbedtls_ssl_cache_context *cache )
+{
+ mbedtls_ssl_cache_entry *cur, *prv;
+
+ cur = cache->chain;
+
+ while( cur != NULL )
+ {
+ prv = cur;
+ cur = cur->next;
+
+ mbedtls_ssl_session_free( &prv->session );
+
+#if defined(MBEDTLS_X509_CRT_PARSE_C) && \
+ defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
+ mbedtls_free( prv->peer_cert.p );
+#endif /* MBEDTLS_X509_CRT_PARSE_C && MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
+
+ mbedtls_free( prv );
+ }
+
+#if defined(MBEDTLS_THREADING_C)
+ mbedtls_mutex_free( &cache->mutex );
+#endif
+ cache->chain = NULL;
+}
+
+#endif /* MBEDTLS_SSL_CACHE_C */
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