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Diffstat (limited to 'externals/mbedtls/library/ssl_ticket.c')
-rw-r--r--externals/mbedtls/library/ssl_ticket.c530
1 files changed, 0 insertions, 530 deletions
diff --git a/externals/mbedtls/library/ssl_ticket.c b/externals/mbedtls/library/ssl_ticket.c
deleted file mode 100644
index bbde8e4ceb..0000000000
--- a/externals/mbedtls/library/ssl_ticket.c
+++ /dev/null
@@ -1,530 +0,0 @@
-/*
- * TLS server tickets callbacks implementation
- *
- * Copyright The Mbed TLS Contributors
- * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
- *
- * This file is provided under the Apache License 2.0, or the
- * GNU General Public License v2.0 or later.
- *
- * **********
- * Apache License 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.
- *
- * **********
- *
- * **********
- * GNU General Public License v2.0 or later:
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * **********
- */
-
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
-
-#if defined(MBEDTLS_SSL_TICKET_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_internal.h"
-#include "mbedtls/ssl_ticket.h"
-#include "mbedtls/platform_util.h"
-
-#include <string.h>
-
-/*
- * Initialze context
- */
-void mbedtls_ssl_ticket_init( mbedtls_ssl_ticket_context *ctx )
-{
- memset( ctx, 0, sizeof( mbedtls_ssl_ticket_context ) );
-
-#if defined(MBEDTLS_THREADING_C)
- mbedtls_mutex_init( &ctx->mutex );
-#endif
-}
-
-#define MAX_KEY_BYTES 32 /* 256 bits */
-
-#define TICKET_KEY_NAME_BYTES 4
-#define TICKET_IV_BYTES 12
-#define TICKET_CRYPT_LEN_BYTES 2
-#define TICKET_AUTH_TAG_BYTES 16
-
-#define TICKET_MIN_LEN ( TICKET_KEY_NAME_BYTES + \
- TICKET_IV_BYTES + \
- TICKET_CRYPT_LEN_BYTES + \
- TICKET_AUTH_TAG_BYTES )
-#define TICKET_ADD_DATA_LEN ( TICKET_KEY_NAME_BYTES + \
- TICKET_IV_BYTES + \
- TICKET_CRYPT_LEN_BYTES )
-
-/*
- * Generate/update a key
- */
-static int ssl_ticket_gen_key( mbedtls_ssl_ticket_context *ctx,
- unsigned char index )
-{
- int ret;
- unsigned char buf[MAX_KEY_BYTES];
- mbedtls_ssl_ticket_key *key = ctx->keys + index;
-
-#if defined(MBEDTLS_HAVE_TIME)
- key->generation_time = (uint32_t) mbedtls_time( NULL );
-#endif
-
- if( ( ret = ctx->f_rng( ctx->p_rng, key->name, sizeof( key->name ) ) ) != 0 )
- return( ret );
-
- if( ( ret = ctx->f_rng( ctx->p_rng, buf, sizeof( buf ) ) ) != 0 )
- return( ret );
-
- /* With GCM and CCM, same context can encrypt & decrypt */
- ret = mbedtls_cipher_setkey( &key->ctx, buf,
- mbedtls_cipher_get_key_bitlen( &key->ctx ),
- MBEDTLS_ENCRYPT );
-
- mbedtls_platform_zeroize( buf, sizeof( buf ) );
-
- return( ret );
-}
-
-/*
- * Rotate/generate keys if necessary
- */
-static int ssl_ticket_update_keys( mbedtls_ssl_ticket_context *ctx )
-{
-#if !defined(MBEDTLS_HAVE_TIME)
- ((void) ctx);
-#else
- if( ctx->ticket_lifetime != 0 )
- {
- uint32_t current_time = (uint32_t) mbedtls_time( NULL );
- uint32_t key_time = ctx->keys[ctx->active].generation_time;
-
- if( current_time >= key_time &&
- current_time - key_time < ctx->ticket_lifetime )
- {
- return( 0 );
- }
-
- ctx->active = 1 - ctx->active;
-
- return( ssl_ticket_gen_key( ctx, ctx->active ) );
- }
- else
-#endif /* MBEDTLS_HAVE_TIME */
- return( 0 );
-}
-
-/*
- * Setup context for actual use
- */
-int mbedtls_ssl_ticket_setup( mbedtls_ssl_ticket_context *ctx,
- int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
- mbedtls_cipher_type_t cipher,
- uint32_t lifetime )
-{
- int ret;
- const mbedtls_cipher_info_t *cipher_info;
-
- ctx->f_rng = f_rng;
- ctx->p_rng = p_rng;
-
- ctx->ticket_lifetime = lifetime;
-
- cipher_info = mbedtls_cipher_info_from_type( cipher);
- if( cipher_info == NULL )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- if( cipher_info->mode != MBEDTLS_MODE_GCM &&
- cipher_info->mode != MBEDTLS_MODE_CCM )
- {
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
-
- if( cipher_info->key_bitlen > 8 * MAX_KEY_BYTES )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- if( ( ret = mbedtls_cipher_setup( &ctx->keys[0].ctx, cipher_info ) ) != 0 ||
- ( ret = mbedtls_cipher_setup( &ctx->keys[1].ctx, cipher_info ) ) != 0 )
- {
- return( ret );
- }
-
- if( ( ret = ssl_ticket_gen_key( ctx, 0 ) ) != 0 ||
- ( ret = ssl_ticket_gen_key( ctx, 1 ) ) != 0 )
- {
- return( ret );
- }
-
- return( 0 );
-}
-
-/*
- * Serialize a session in the following format:
- * 0 . n-1 session structure, n = sizeof(mbedtls_ssl_session)
- * n . n+2 peer_cert length = m (0 if no certificate)
- * n+3 . n+2+m peer cert ASN.1
- */
-static int ssl_save_session( const mbedtls_ssl_session *session,
- unsigned char *buf, size_t buf_len,
- size_t *olen )
-{
- unsigned char *p = buf;
- size_t left = buf_len;
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
- size_t cert_len;
-#endif /* MBEDTLS_X509_CRT_PARSE_C */
-
- if( left < sizeof( mbedtls_ssl_session ) )
- return( MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
-
- memcpy( p, session, sizeof( mbedtls_ssl_session ) );
- p += sizeof( mbedtls_ssl_session );
- left -= sizeof( mbedtls_ssl_session );
-
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
- if( session->peer_cert == NULL )
- cert_len = 0;
- else
- cert_len = session->peer_cert->raw.len;
-
- if( left < 3 + cert_len )
- return( MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
-
- *p++ = (unsigned char)( ( cert_len >> 16 ) & 0xFF );
- *p++ = (unsigned char)( ( cert_len >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( cert_len ) & 0xFF );
-
- if( session->peer_cert != NULL )
- memcpy( p, session->peer_cert->raw.p, cert_len );
-
- p += cert_len;
-#endif /* MBEDTLS_X509_CRT_PARSE_C */
-
- *olen = p - buf;
-
- return( 0 );
-}
-
-/*
- * Unserialise session, see ssl_save_session()
- */
-static int ssl_load_session( mbedtls_ssl_session *session,
- const unsigned char *buf, size_t len )
-{
- const unsigned char *p = buf;
- const unsigned char * const end = buf + len;
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
- size_t cert_len;
-#endif /* MBEDTLS_X509_CRT_PARSE_C */
-
- if( sizeof( mbedtls_ssl_session ) > (size_t)( end - p ) )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- memcpy( session, p, sizeof( mbedtls_ssl_session ) );
- p += sizeof( mbedtls_ssl_session );
-
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
- if( 3 > (size_t)( end - p ) )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- cert_len = ( p[0] << 16 ) | ( p[1] << 8 ) | p[2];
- p += 3;
-
- if( cert_len == 0 )
- {
- session->peer_cert = NULL;
- }
- else
- {
- int ret;
-
- if( cert_len > (size_t)( end - p ) )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- session->peer_cert = mbedtls_calloc( 1, sizeof( mbedtls_x509_crt ) );
-
- if( session->peer_cert == NULL )
- return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
-
- mbedtls_x509_crt_init( session->peer_cert );
-
- if( ( ret = mbedtls_x509_crt_parse_der( session->peer_cert,
- p, cert_len ) ) != 0 )
- {
- mbedtls_x509_crt_free( session->peer_cert );
- mbedtls_free( session->peer_cert );
- session->peer_cert = NULL;
- return( ret );
- }
-
- p += cert_len;
- }
-#endif /* MBEDTLS_X509_CRT_PARSE_C */
-
- if( p != end )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- return( 0 );
-}
-
-/*
- * Create session ticket, with the following structure:
- *
- * struct {
- * opaque key_name[4];
- * opaque iv[12];
- * opaque encrypted_state<0..2^16-1>;
- * opaque tag[16];
- * } ticket;
- *
- * The key_name, iv, and length of encrypted_state are the additional
- * authenticated data.
- */
-
-int mbedtls_ssl_ticket_write( void *p_ticket,
- const mbedtls_ssl_session *session,
- unsigned char *start,
- const unsigned char *end,
- size_t *tlen,
- uint32_t *ticket_lifetime )
-{
- int ret;
- mbedtls_ssl_ticket_context *ctx = p_ticket;
- mbedtls_ssl_ticket_key *key;
- unsigned char *key_name = start;
- unsigned char *iv = start + TICKET_KEY_NAME_BYTES;
- unsigned char *state_len_bytes = iv + TICKET_IV_BYTES;
- unsigned char *state = state_len_bytes + TICKET_CRYPT_LEN_BYTES;
- unsigned char *tag;
- size_t clear_len, ciph_len;
-
- *tlen = 0;
-
- if( ctx == NULL || ctx->f_rng == NULL )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- /* We need at least 4 bytes for key_name, 12 for IV, 2 for len 16 for tag,
- * in addition to session itself, that will be checked when writing it. */
- MBEDTLS_SSL_CHK_BUF_PTR( start, end, TICKET_MIN_LEN );
-
-#if defined(MBEDTLS_THREADING_C)
- if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 )
- return( ret );
-#endif
-
- if( ( ret = ssl_ticket_update_keys( ctx ) ) != 0 )
- goto cleanup;
-
- key = &ctx->keys[ctx->active];
-
- *ticket_lifetime = ctx->ticket_lifetime;
-
- memcpy( key_name, key->name, TICKET_KEY_NAME_BYTES );
-
- if( ( ret = ctx->f_rng( ctx->p_rng, iv, TICKET_IV_BYTES ) ) != 0 )
- goto cleanup;
-
- /* Dump session state */
- if( ( ret = ssl_save_session( session,
- state, end - state, &clear_len ) ) != 0 ||
- (unsigned long) clear_len > 65535 )
- {
- goto cleanup;
- }
- state_len_bytes[0] = ( clear_len >> 8 ) & 0xff;
- state_len_bytes[1] = ( clear_len ) & 0xff;
-
- /* Encrypt and authenticate */
- tag = state + clear_len;
- if( ( ret = mbedtls_cipher_auth_encrypt( &key->ctx,
- iv, TICKET_IV_BYTES,
- /* Additional data: key name, IV and length */
- key_name, TICKET_ADD_DATA_LEN,
- state, clear_len, state, &ciph_len,
- tag, TICKET_AUTH_TAG_BYTES ) ) != 0 )
- {
- goto cleanup;
- }
- if( ciph_len != clear_len )
- {
- ret = MBEDTLS_ERR_SSL_INTERNAL_ERROR;
- goto cleanup;
- }
-
- *tlen = TICKET_MIN_LEN + ciph_len;
-
-cleanup:
-#if defined(MBEDTLS_THREADING_C)
- if( mbedtls_mutex_unlock( &ctx->mutex ) != 0 )
- return( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
-#endif
-
- return( ret );
-}
-
-/*
- * Select key based on name
- */
-static mbedtls_ssl_ticket_key *ssl_ticket_select_key(
- mbedtls_ssl_ticket_context *ctx,
- const unsigned char name[4] )
-{
- unsigned char i;
-
- for( i = 0; i < sizeof( ctx->keys ) / sizeof( *ctx->keys ); i++ )
- if( memcmp( name, ctx->keys[i].name, 4 ) == 0 )
- return( &ctx->keys[i] );
-
- return( NULL );
-}
-
-/*
- * Load session ticket (see mbedtls_ssl_ticket_write for structure)
- */
-int mbedtls_ssl_ticket_parse( void *p_ticket,
- mbedtls_ssl_session *session,
- unsigned char *buf,
- size_t len )
-{
- int ret;
- mbedtls_ssl_ticket_context *ctx = p_ticket;
- mbedtls_ssl_ticket_key *key;
- unsigned char *key_name = buf;
- unsigned char *iv = buf + TICKET_KEY_NAME_BYTES;
- unsigned char *enc_len_p = iv + TICKET_IV_BYTES;
- unsigned char *ticket = enc_len_p + TICKET_CRYPT_LEN_BYTES;
- unsigned char *tag;
- size_t enc_len, clear_len;
-
- if( ctx == NULL || ctx->f_rng == NULL )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- if( len < TICKET_MIN_LEN )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
-#if defined(MBEDTLS_THREADING_C)
- if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 )
- return( ret );
-#endif
-
- if( ( ret = ssl_ticket_update_keys( ctx ) ) != 0 )
- goto cleanup;
-
- enc_len = ( enc_len_p[0] << 8 ) | enc_len_p[1];
- tag = ticket + enc_len;
-
- if( len != TICKET_MIN_LEN + enc_len )
- {
- ret = MBEDTLS_ERR_SSL_BAD_INPUT_DATA;
- goto cleanup;
- }
-
- /* Select key */
- if( ( key = ssl_ticket_select_key( ctx, key_name ) ) == NULL )
- {
- /* We can't know for sure but this is a likely option unless we're
- * under attack - this is only informative anyway */
- ret = MBEDTLS_ERR_SSL_SESSION_TICKET_EXPIRED;
- goto cleanup;
- }
-
- /* Decrypt and authenticate */
- if( ( ret = mbedtls_cipher_auth_decrypt( &key->ctx,
- iv, TICKET_IV_BYTES,
- /* Additional data: key name, IV and length */
- key_name, TICKET_ADD_DATA_LEN,
- ticket, enc_len,
- ticket, &clear_len,
- tag, TICKET_AUTH_TAG_BYTES ) ) != 0 )
- {
- if( ret == MBEDTLS_ERR_CIPHER_AUTH_FAILED )
- ret = MBEDTLS_ERR_SSL_INVALID_MAC;
-
- goto cleanup;
- }
- if( clear_len != enc_len )
- {
- ret = MBEDTLS_ERR_SSL_INTERNAL_ERROR;
- goto cleanup;
- }
-
- /* Actually load session */
- if( ( ret = ssl_load_session( session, ticket, clear_len ) ) != 0 )
- goto cleanup;
-
-#if defined(MBEDTLS_HAVE_TIME)
- {
- /* Check for expiration */
- mbedtls_time_t current_time = mbedtls_time( NULL );
-
- if( current_time < session->start ||
- (uint32_t)( current_time - session->start ) > ctx->ticket_lifetime )
- {
- ret = MBEDTLS_ERR_SSL_SESSION_TICKET_EXPIRED;
- goto cleanup;
- }
- }
-#endif
-
-cleanup:
-#if defined(MBEDTLS_THREADING_C)
- if( mbedtls_mutex_unlock( &ctx->mutex ) != 0 )
- return( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
-#endif
-
- return( ret );
-}
-
-/*
- * Free context
- */
-void mbedtls_ssl_ticket_free( mbedtls_ssl_ticket_context *ctx )
-{
- mbedtls_cipher_free( &ctx->keys[0].ctx );
- mbedtls_cipher_free( &ctx->keys[1].ctx );
-
-#if defined(MBEDTLS_THREADING_C)
- mbedtls_mutex_free( &ctx->mutex );
-#endif
-
- mbedtls_platform_zeroize( ctx, sizeof( mbedtls_ssl_ticket_context ) );
-}
-
-#endif /* MBEDTLS_SSL_TICKET_C */
generated by cgit v1.2.3 (git 2.39.1) at 2026-11-04 02:17:47 +0000