early-access version 1503
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79
externals/mbedtls/library/gcm.c
vendored
79
externals/mbedtls/library/gcm.c
vendored
@@ -1,8 +1,31 @@
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/*
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* NIST SP800-38D compliant GCM implementation
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*
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* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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* SPDX-License-Identifier: GPL-2.0
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
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*
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* This file is provided under the Apache License 2.0, or the
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* GNU General Public License v2.0 or later.
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*
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* **********
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* Apache License 2.0:
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* **********
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*
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* **********
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* GNU General Public License v2.0 or later:
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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@@ -18,7 +41,7 @@
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* This file is part of mbed TLS (https://tls.mbed.org)
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* **********
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*/
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/*
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@@ -50,9 +73,8 @@
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#if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C)
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#include "mbedtls/aes.h"
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#if defined(MBEDTLS_PLATFORM_C)
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#include "mbedtls/platform.h"
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#else
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#if !defined(MBEDTLS_PLATFORM_C)
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#include <stdio.h>
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#define mbedtls_printf printf
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#endif /* MBEDTLS_PLATFORM_C */
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@@ -60,6 +82,12 @@
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#if !defined(MBEDTLS_GCM_ALT)
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/* Parameter validation macros */
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#define GCM_VALIDATE_RET( cond ) \
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MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_GCM_BAD_INPUT )
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#define GCM_VALIDATE( cond ) \
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MBEDTLS_INTERNAL_VALIDATE( cond )
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/*
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* 32-bit integer manipulation macros (big endian)
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*/
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@@ -88,6 +116,7 @@
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*/
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void mbedtls_gcm_init( mbedtls_gcm_context *ctx )
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{
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GCM_VALIDATE( ctx != NULL );
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memset( ctx, 0, sizeof( mbedtls_gcm_context ) );
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}
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@@ -167,6 +196,10 @@ int mbedtls_gcm_setkey( mbedtls_gcm_context *ctx,
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int ret;
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const mbedtls_cipher_info_t *cipher_info;
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GCM_VALIDATE_RET( ctx != NULL );
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GCM_VALIDATE_RET( key != NULL );
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GCM_VALIDATE_RET( keybits == 128 || keybits == 192 || keybits == 256 );
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cipher_info = mbedtls_cipher_info_from_values( cipher, keybits, MBEDTLS_MODE_ECB );
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if( cipher_info == NULL )
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return( MBEDTLS_ERR_GCM_BAD_INPUT );
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@@ -277,6 +310,10 @@ int mbedtls_gcm_starts( mbedtls_gcm_context *ctx,
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const unsigned char *p;
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size_t use_len, olen = 0;
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GCM_VALIDATE_RET( ctx != NULL );
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GCM_VALIDATE_RET( iv != NULL );
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GCM_VALIDATE_RET( add_len == 0 || add != NULL );
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/* IV and AD are limited to 2^64 bits, so 2^61 bytes */
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/* IV is not allowed to be zero length */
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if( iv_len == 0 ||
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@@ -359,6 +396,10 @@ int mbedtls_gcm_update( mbedtls_gcm_context *ctx,
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unsigned char *out_p = output;
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size_t use_len, olen = 0;
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GCM_VALIDATE_RET( ctx != NULL );
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GCM_VALIDATE_RET( length == 0 || input != NULL );
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GCM_VALIDATE_RET( length == 0 || output != NULL );
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if( output > input && (size_t) ( output - input ) < length )
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return( MBEDTLS_ERR_GCM_BAD_INPUT );
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@@ -412,8 +453,14 @@ int mbedtls_gcm_finish( mbedtls_gcm_context *ctx,
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{
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unsigned char work_buf[16];
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size_t i;
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uint64_t orig_len = ctx->len * 8;
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uint64_t orig_add_len = ctx->add_len * 8;
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uint64_t orig_len;
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uint64_t orig_add_len;
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GCM_VALIDATE_RET( ctx != NULL );
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GCM_VALIDATE_RET( tag != NULL );
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orig_len = ctx->len * 8;
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orig_add_len = ctx->add_len * 8;
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if( tag_len > 16 || tag_len < 4 )
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return( MBEDTLS_ERR_GCM_BAD_INPUT );
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@@ -455,6 +502,13 @@ int mbedtls_gcm_crypt_and_tag( mbedtls_gcm_context *ctx,
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{
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int ret;
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GCM_VALIDATE_RET( ctx != NULL );
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GCM_VALIDATE_RET( iv != NULL );
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GCM_VALIDATE_RET( add_len == 0 || add != NULL );
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GCM_VALIDATE_RET( length == 0 || input != NULL );
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GCM_VALIDATE_RET( length == 0 || output != NULL );
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GCM_VALIDATE_RET( tag != NULL );
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if( ( ret = mbedtls_gcm_starts( ctx, mode, iv, iv_len, add, add_len ) ) != 0 )
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return( ret );
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@@ -483,6 +537,13 @@ int mbedtls_gcm_auth_decrypt( mbedtls_gcm_context *ctx,
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size_t i;
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int diff;
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GCM_VALIDATE_RET( ctx != NULL );
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GCM_VALIDATE_RET( iv != NULL );
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GCM_VALIDATE_RET( add_len == 0 || add != NULL );
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GCM_VALIDATE_RET( tag != NULL );
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GCM_VALIDATE_RET( length == 0 || input != NULL );
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GCM_VALIDATE_RET( length == 0 || output != NULL );
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if( ( ret = mbedtls_gcm_crypt_and_tag( ctx, MBEDTLS_GCM_DECRYPT, length,
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iv, iv_len, add, add_len,
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input, output, tag_len, check_tag ) ) != 0 )
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@@ -505,6 +566,8 @@ int mbedtls_gcm_auth_decrypt( mbedtls_gcm_context *ctx,
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void mbedtls_gcm_free( mbedtls_gcm_context *ctx )
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{
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if( ctx == NULL )
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return;
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mbedtls_cipher_free( &ctx->cipher_ctx );
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mbedtls_platform_zeroize( ctx, sizeof( mbedtls_gcm_context ) );
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}
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@@ -766,7 +829,7 @@ int mbedtls_gcm_self_test( int verbose )
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* there is an alternative underlying implementation i.e. when
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* MBEDTLS_AES_ALT is defined.
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*/
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if( ret == MBEDTLS_ERR_AES_FEATURE_UNAVAILABLE && key_len == 192 )
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if( ret == MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED && key_len == 192 )
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{
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mbedtls_printf( "skipped\n" );
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break;
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