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Diffstat (limited to 'lib/mbedtls-2.27.0/library/ssl_cookie.c')
-rw-r--r--lib/mbedtls-2.27.0/library/ssl_cookie.c249
1 files changed, 0 insertions, 249 deletions
diff --git a/lib/mbedtls-2.27.0/library/ssl_cookie.c b/lib/mbedtls-2.27.0/library/ssl_cookie.c
deleted file mode 100644
index 69d1b32..0000000
--- a/lib/mbedtls-2.27.0/library/ssl_cookie.c
+++ /dev/null
@@ -1,249 +0,0 @@
-/*
- * DTLS cookie callbacks implementation
- *
- * Copyright The Mbed TLS Contributors
- * 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.
- */
-/*
- * These session callbacks use a simple chained list
- * to store and retrieve the session information.
- */
-
-#include "common.h"
-
-#if defined(MBEDTLS_SSL_COOKIE_C)
-
-#if defined(MBEDTLS_PLATFORM_C)
-#include "mbedtls/platform.h"
-#else
-#define mbedtls_calloc calloc
-#define mbedtls_free free
-#endif
-
-#include "mbedtls/ssl_cookie.h"
-#include "mbedtls/ssl_internal.h"
-#include "mbedtls/error.h"
-#include "mbedtls/platform_util.h"
-
-#include <string.h>
-
-/*
- * If DTLS is in use, then at least one of SHA-1, SHA-256, SHA-512 is
- * available. Try SHA-256 first, 512 wastes resources since we need to stay
- * with max 32 bytes of cookie for DTLS 1.0
- */
-#if defined(MBEDTLS_SHA256_C)
-#define COOKIE_MD MBEDTLS_MD_SHA224
-#define COOKIE_MD_OUTLEN 32
-#define COOKIE_HMAC_LEN 28
-#elif defined(MBEDTLS_SHA512_C)
-#define COOKIE_MD MBEDTLS_MD_SHA384
-#define COOKIE_MD_OUTLEN 48
-#define COOKIE_HMAC_LEN 28
-#elif defined(MBEDTLS_SHA1_C)
-#define COOKIE_MD MBEDTLS_MD_SHA1
-#define COOKIE_MD_OUTLEN 20
-#define COOKIE_HMAC_LEN 20
-#else
-#error "DTLS hello verify needs SHA-1 or SHA-2"
-#endif
-
-/*
- * Cookies are formed of a 4-bytes timestamp (or serial number) and
- * an HMAC of timestemp and client ID.
- */
-#define COOKIE_LEN ( 4 + COOKIE_HMAC_LEN )
-
-void mbedtls_ssl_cookie_init( mbedtls_ssl_cookie_ctx *ctx )
-{
- mbedtls_md_init( &ctx->hmac_ctx );
-#if !defined(MBEDTLS_HAVE_TIME)
- ctx->serial = 0;
-#endif
- ctx->timeout = MBEDTLS_SSL_COOKIE_TIMEOUT;
-
-#if defined(MBEDTLS_THREADING_C)
- mbedtls_mutex_init( &ctx->mutex );
-#endif
-}
-
-void mbedtls_ssl_cookie_set_timeout( mbedtls_ssl_cookie_ctx *ctx, unsigned long delay )
-{
- ctx->timeout = delay;
-}
-
-void mbedtls_ssl_cookie_free( mbedtls_ssl_cookie_ctx *ctx )
-{
- mbedtls_md_free( &ctx->hmac_ctx );
-
-#if defined(MBEDTLS_THREADING_C)
- mbedtls_mutex_free( &ctx->mutex );
-#endif
-
- mbedtls_platform_zeroize( ctx, sizeof( mbedtls_ssl_cookie_ctx ) );
-}
-
-int mbedtls_ssl_cookie_setup( mbedtls_ssl_cookie_ctx *ctx,
- int (*f_rng)(void *, unsigned char *, size_t),
- void *p_rng )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- unsigned char key[COOKIE_MD_OUTLEN];
-
- if( ( ret = f_rng( p_rng, key, sizeof( key ) ) ) != 0 )
- return( ret );
-
- ret = mbedtls_md_setup( &ctx->hmac_ctx, mbedtls_md_info_from_type( COOKIE_MD ), 1 );
- if( ret != 0 )
- return( ret );
-
- ret = mbedtls_md_hmac_starts( &ctx->hmac_ctx, key, sizeof( key ) );
- if( ret != 0 )
- return( ret );
-
- mbedtls_platform_zeroize( key, sizeof( key ) );
-
- return( 0 );
-}
-
-/*
- * Generate the HMAC part of a cookie
- */
-static int ssl_cookie_hmac( mbedtls_md_context_t *hmac_ctx,
- const unsigned char time[4],
- unsigned char **p, unsigned char *end,
- const unsigned char *cli_id, size_t cli_id_len )
-{
- unsigned char hmac_out[COOKIE_MD_OUTLEN];
-
- MBEDTLS_SSL_CHK_BUF_PTR( *p, end, COOKIE_HMAC_LEN );
-
- if( mbedtls_md_hmac_reset( hmac_ctx ) != 0 ||
- mbedtls_md_hmac_update( hmac_ctx, time, 4 ) != 0 ||
- mbedtls_md_hmac_update( hmac_ctx, cli_id, cli_id_len ) != 0 ||
- mbedtls_md_hmac_finish( hmac_ctx, hmac_out ) != 0 )
- {
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
-
- memcpy( *p, hmac_out, COOKIE_HMAC_LEN );
- *p += COOKIE_HMAC_LEN;
-
- return( 0 );
-}
-
-/*
- * Generate cookie for DTLS ClientHello verification
- */
-int mbedtls_ssl_cookie_write( void *p_ctx,
- unsigned char **p, unsigned char *end,
- const unsigned char *cli_id, size_t cli_id_len )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- mbedtls_ssl_cookie_ctx *ctx = (mbedtls_ssl_cookie_ctx *) p_ctx;
- unsigned long t;
-
- if( ctx == NULL || cli_id == NULL )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- MBEDTLS_SSL_CHK_BUF_PTR( *p, end, COOKIE_LEN );
-
-#if defined(MBEDTLS_HAVE_TIME)
- t = (unsigned long) mbedtls_time( NULL );
-#else
- t = ctx->serial++;
-#endif
-
- (*p)[0] = (unsigned char)( t >> 24 );
- (*p)[1] = (unsigned char)( t >> 16 );
- (*p)[2] = (unsigned char)( t >> 8 );
- (*p)[3] = (unsigned char)( t );
- *p += 4;
-
-#if defined(MBEDTLS_THREADING_C)
- if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 )
- return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_SSL_INTERNAL_ERROR, ret ) );
-#endif
-
- ret = ssl_cookie_hmac( &ctx->hmac_ctx, *p - 4,
- p, end, cli_id, cli_id_len );
-
-#if defined(MBEDTLS_THREADING_C)
- if( mbedtls_mutex_unlock( &ctx->mutex ) != 0 )
- return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_SSL_INTERNAL_ERROR,
- MBEDTLS_ERR_THREADING_MUTEX_ERROR ) );
-#endif
-
- return( ret );
-}
-
-/*
- * Check a cookie
- */
-int mbedtls_ssl_cookie_check( void *p_ctx,
- const unsigned char *cookie, size_t cookie_len,
- const unsigned char *cli_id, size_t cli_id_len )
-{
- unsigned char ref_hmac[COOKIE_HMAC_LEN];
- int ret = 0;
- unsigned char *p = ref_hmac;
- mbedtls_ssl_cookie_ctx *ctx = (mbedtls_ssl_cookie_ctx *) p_ctx;
- unsigned long cur_time, cookie_time;
-
- if( ctx == NULL || cli_id == NULL )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- if( cookie_len != COOKIE_LEN )
- return( -1 );
-
-#if defined(MBEDTLS_THREADING_C)
- if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 )
- return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_SSL_INTERNAL_ERROR, ret ) );
-#endif
-
- if( ssl_cookie_hmac( &ctx->hmac_ctx, cookie,
- &p, p + sizeof( ref_hmac ),
- cli_id, cli_id_len ) != 0 )
- ret = -1;
-
-#if defined(MBEDTLS_THREADING_C)
- if( mbedtls_mutex_unlock( &ctx->mutex ) != 0 )
- return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_SSL_INTERNAL_ERROR,
- MBEDTLS_ERR_THREADING_MUTEX_ERROR ) );
-#endif
-
- if( ret != 0 )
- return( ret );
-
- if( mbedtls_ssl_safer_memcmp( cookie + 4, ref_hmac, sizeof( ref_hmac ) ) != 0 )
- return( -1 );
-
-#if defined(MBEDTLS_HAVE_TIME)
- cur_time = (unsigned long) mbedtls_time( NULL );
-#else
- cur_time = ctx->serial;
-#endif
-
- cookie_time = ( (unsigned long) cookie[0] << 24 ) |
- ( (unsigned long) cookie[1] << 16 ) |
- ( (unsigned long) cookie[2] << 8 ) |
- ( (unsigned long) cookie[3] );
-
- if( ctx->timeout != 0 && cur_time - cookie_time > ctx->timeout )
- return( -1 );
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_COOKIE_C */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 03:44:18 +0000