[398] | 1 | /*
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| 2 | * NIST SP800-38C compliant CCM implementation
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| 3 | *
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| 4 | * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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| 5 | * SPDX-License-Identifier: Apache-2.0
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| 6 | *
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| 7 | * Licensed under the Apache License, Version 2.0 (the "License"); you may
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| 8 | * not use this file except in compliance with the License.
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| 9 | * You may obtain a copy of the License at
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| 10 | *
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| 11 | * http://www.apache.org/licenses/LICENSE-2.0
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| 12 | *
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| 13 | * Unless required by applicable law or agreed to in writing, software
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| 14 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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| 15 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 16 | * See the License for the specific language governing permissions and
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| 17 | * limitations under the License.
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| 18 | *
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| 19 | * This file is part of mbed TLS (https://tls.mbed.org)
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| 20 | */
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| 21 |
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| 22 | /*
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| 23 | * Definition of CCM:
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| 24 | * http://csrc.nist.gov/publications/nistpubs/800-38C/SP800-38C_updated-July20_2007.pdf
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| 25 | * RFC 3610 "Counter with CBC-MAC (CCM)"
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| 26 | *
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| 27 | * Related:
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| 28 | * RFC 5116 "An Interface and Algorithms for Authenticated Encryption"
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| 29 | */
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| 30 |
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| 31 | #if !defined(MBEDTLS_CONFIG_FILE)
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| 32 | #include "mbedtls/config.h"
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| 33 | #else
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| 34 | #include MBEDTLS_CONFIG_FILE
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| 35 | #endif
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| 36 |
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| 37 | #if defined(MBEDTLS_CCM_C)
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| 38 |
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| 39 | #include "mbedtls/ccm.h"
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| 40 | #include "mbedtls/platform_util.h"
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| 41 |
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| 42 | #include <string.h>
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| 43 |
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| 44 | #if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C)
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| 45 | #if defined(MBEDTLS_PLATFORM_C)
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| 46 | #include "mbedtls/platform.h"
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| 47 | #else
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| 48 | #include <stdio.h>
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| 49 | #define mbedtls_printf printf
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| 50 | #endif /* MBEDTLS_PLATFORM_C */
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| 51 | #endif /* MBEDTLS_SELF_TEST && MBEDTLS_AES_C */
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| 52 |
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| 53 | #if !defined(MBEDTLS_CCM_ALT)
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| 54 |
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| 55 | #define CCM_VALIDATE_RET( cond ) \
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| 56 | MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_CCM_BAD_INPUT )
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| 57 | #define CCM_VALIDATE( cond ) \
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| 58 | MBEDTLS_INTERNAL_VALIDATE( cond )
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| 59 |
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| 60 | #define CCM_ENCRYPT 0
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| 61 | #define CCM_DECRYPT 1
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| 62 |
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| 63 | /*
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| 64 | * Initialize context
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| 65 | */
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| 66 | void mbedtls_ccm_init( mbedtls_ccm_context *ctx )
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| 67 | {
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| 68 | CCM_VALIDATE( ctx != NULL );
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| 69 | memset( ctx, 0, sizeof( mbedtls_ccm_context ) );
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| 70 | }
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| 71 |
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| 72 | int mbedtls_ccm_setkey( mbedtls_ccm_context *ctx,
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| 73 | mbedtls_cipher_id_t cipher,
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| 74 | const unsigned char *key,
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| 75 | unsigned int keybits )
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| 76 | {
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| 77 | int ret;
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| 78 | const mbedtls_cipher_info_t *cipher_info;
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| 79 |
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| 80 | CCM_VALIDATE_RET( ctx != NULL );
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| 81 | CCM_VALIDATE_RET( key != NULL );
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| 82 |
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| 83 | cipher_info = mbedtls_cipher_info_from_values( cipher, keybits, MBEDTLS_MODE_ECB );
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| 84 | if( cipher_info == NULL )
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| 85 | return( MBEDTLS_ERR_CCM_BAD_INPUT );
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| 86 |
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| 87 | if( cipher_info->block_size != 16 )
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| 88 | return( MBEDTLS_ERR_CCM_BAD_INPUT );
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| 89 |
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| 90 | mbedtls_cipher_free( &ctx->cipher_ctx );
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| 91 |
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| 92 | if( ( ret = mbedtls_cipher_setup( &ctx->cipher_ctx, cipher_info ) ) != 0 )
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| 93 | return( ret );
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| 94 |
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| 95 | if( ( ret = mbedtls_cipher_setkey( &ctx->cipher_ctx, key, keybits,
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| 96 | MBEDTLS_ENCRYPT ) ) != 0 )
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| 97 | {
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| 98 | return( ret );
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| 99 | }
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| 100 |
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| 101 | return( 0 );
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| 102 | }
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| 103 |
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| 104 | /*
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| 105 | * Free context
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| 106 | */
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| 107 | void mbedtls_ccm_free( mbedtls_ccm_context *ctx )
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| 108 | {
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| 109 | if( ctx == NULL )
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| 110 | return;
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| 111 | mbedtls_cipher_free( &ctx->cipher_ctx );
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| 112 | mbedtls_platform_zeroize( ctx, sizeof( mbedtls_ccm_context ) );
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| 113 | }
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| 114 |
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| 115 | /*
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| 116 | * Macros for common operations.
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| 117 | * Results in smaller compiled code than static inline functions.
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| 118 | */
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| 119 |
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| 120 | /*
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| 121 | * Update the CBC-MAC state in y using a block in b
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| 122 | * (Always using b as the source helps the compiler optimise a bit better.)
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| 123 | */
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| 124 | #define UPDATE_CBC_MAC \
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| 125 | for( i = 0; i < 16; i++ ) \
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| 126 | y[i] ^= b[i]; \
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| 127 | \
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| 128 | if( ( ret = mbedtls_cipher_update( &ctx->cipher_ctx, y, 16, y, &olen ) ) != 0 ) \
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| 129 | return( ret );
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| 130 |
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| 131 | /*
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| 132 | * Encrypt or decrypt a partial block with CTR
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| 133 | * Warning: using b for temporary storage! src and dst must not be b!
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| 134 | * This avoids allocating one more 16 bytes buffer while allowing src == dst.
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| 135 | */
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| 136 | #define CTR_CRYPT( dst, src, len ) \
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| 137 | if( ( ret = mbedtls_cipher_update( &ctx->cipher_ctx, ctr, 16, b, &olen ) ) != 0 ) \
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| 138 | return( ret ); \
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| 139 | \
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| 140 | for( i = 0; i < len; i++ ) \
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| 141 | dst[i] = src[i] ^ b[i];
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| 142 |
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| 143 | /*
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| 144 | * Authenticated encryption or decryption
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| 145 | */
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| 146 | static int ccm_auth_crypt( mbedtls_ccm_context *ctx, int mode, size_t length,
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| 147 | const unsigned char *iv, size_t iv_len,
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| 148 | const unsigned char *add, size_t add_len,
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| 149 | const unsigned char *input, unsigned char *output,
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| 150 | unsigned char *tag, size_t tag_len )
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| 151 | {
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| 152 | int ret;
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| 153 | unsigned char i;
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| 154 | unsigned char q;
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| 155 | size_t len_left, olen;
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| 156 | unsigned char b[16];
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| 157 | unsigned char y[16];
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| 158 | unsigned char ctr[16];
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| 159 | const unsigned char *src;
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| 160 | unsigned char *dst;
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| 161 |
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| 162 | /*
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| 163 | * Check length requirements: SP800-38C A.1
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| 164 | * Additional requirement: a < 2^16 - 2^8 to simplify the code.
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| 165 | * 'length' checked later (when writing it to the first block)
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| 166 | *
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| 167 | * Also, loosen the requirements to enable support for CCM* (IEEE 802.15.4).
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| 168 | */
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| 169 | if( tag_len == 2 || tag_len > 16 || tag_len % 2 != 0 )
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| 170 | return( MBEDTLS_ERR_CCM_BAD_INPUT );
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| 171 |
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| 172 | /* Also implies q is within bounds */
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| 173 | if( iv_len < 7 || iv_len > 13 )
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| 174 | return( MBEDTLS_ERR_CCM_BAD_INPUT );
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| 175 |
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| 176 | if( add_len > 0xFF00 )
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| 177 | return( MBEDTLS_ERR_CCM_BAD_INPUT );
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| 178 |
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| 179 | q = 16 - 1 - (unsigned char) iv_len;
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| 180 |
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| 181 | /*
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| 182 | * First block B_0:
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| 183 | * 0 .. 0 flags
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| 184 | * 1 .. iv_len nonce (aka iv)
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| 185 | * iv_len+1 .. 15 length
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| 186 | *
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| 187 | * With flags as (bits):
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| 188 | * 7 0
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| 189 | * 6 add present?
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| 190 | * 5 .. 3 (t - 2) / 2
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| 191 | * 2 .. 0 q - 1
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| 192 | */
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| 193 | b[0] = 0;
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| 194 | b[0] |= ( add_len > 0 ) << 6;
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| 195 | b[0] |= ( ( tag_len - 2 ) / 2 ) << 3;
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| 196 | b[0] |= q - 1;
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| 197 |
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| 198 | memcpy( b + 1, iv, iv_len );
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| 199 |
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| 200 | for( i = 0, len_left = length; i < q; i++, len_left >>= 8 )
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| 201 | b[15-i] = (unsigned char)( len_left & 0xFF );
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| 202 |
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| 203 | if( len_left > 0 )
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| 204 | return( MBEDTLS_ERR_CCM_BAD_INPUT );
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| 205 |
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| 206 |
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| 207 | /* Start CBC-MAC with first block */
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| 208 | memset( y, 0, 16 );
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| 209 | UPDATE_CBC_MAC;
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| 210 |
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| 211 | /*
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| 212 | * If there is additional data, update CBC-MAC with
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| 213 | * add_len, add, 0 (padding to a block boundary)
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| 214 | */
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| 215 | if( add_len > 0 )
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| 216 | {
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| 217 | size_t use_len;
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| 218 | len_left = add_len;
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| 219 | src = add;
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| 220 |
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| 221 | memset( b, 0, 16 );
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| 222 | b[0] = (unsigned char)( ( add_len >> 8 ) & 0xFF );
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| 223 | b[1] = (unsigned char)( ( add_len ) & 0xFF );
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| 224 |
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| 225 | use_len = len_left < 16 - 2 ? len_left : 16 - 2;
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| 226 | memcpy( b + 2, src, use_len );
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| 227 | len_left -= use_len;
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| 228 | src += use_len;
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| 229 |
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| 230 | UPDATE_CBC_MAC;
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| 231 |
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| 232 | while( len_left > 0 )
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| 233 | {
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| 234 | use_len = len_left > 16 ? 16 : len_left;
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| 235 |
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| 236 | memset( b, 0, 16 );
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| 237 | memcpy( b, src, use_len );
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| 238 | UPDATE_CBC_MAC;
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| 239 |
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| 240 | len_left -= use_len;
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| 241 | src += use_len;
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| 242 | }
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| 243 | }
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| 244 |
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| 245 | /*
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| 246 | * Prepare counter block for encryption:
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| 247 | * 0 .. 0 flags
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| 248 | * 1 .. iv_len nonce (aka iv)
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| 249 | * iv_len+1 .. 15 counter (initially 1)
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| 250 | *
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| 251 | * With flags as (bits):
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| 252 | * 7 .. 3 0
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| 253 | * 2 .. 0 q - 1
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| 254 | */
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| 255 | ctr[0] = q - 1;
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| 256 | memcpy( ctr + 1, iv, iv_len );
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| 257 | memset( ctr + 1 + iv_len, 0, q );
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| 258 | ctr[15] = 1;
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| 259 |
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| 260 | /*
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| 261 | * Authenticate and {en,de}crypt the message.
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| 262 | *
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| 263 | * The only difference between encryption and decryption is
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| 264 | * the respective order of authentication and {en,de}cryption.
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| 265 | */
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| 266 | len_left = length;
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| 267 | src = input;
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| 268 | dst = output;
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| 269 |
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| 270 | while( len_left > 0 )
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| 271 | {
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| 272 | size_t use_len = len_left > 16 ? 16 : len_left;
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| 273 |
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| 274 | if( mode == CCM_ENCRYPT )
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| 275 | {
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| 276 | memset( b, 0, 16 );
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| 277 | memcpy( b, src, use_len );
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| 278 | UPDATE_CBC_MAC;
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| 279 | }
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| 280 |
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| 281 | CTR_CRYPT( dst, src, use_len );
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| 282 |
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| 283 | if( mode == CCM_DECRYPT )
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| 284 | {
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| 285 | memset( b, 0, 16 );
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| 286 | memcpy( b, dst, use_len );
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| 287 | UPDATE_CBC_MAC;
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| 288 | }
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| 289 |
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| 290 | dst += use_len;
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| 291 | src += use_len;
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| 292 | len_left -= use_len;
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| 293 |
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| 294 | /*
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| 295 | * Increment counter.
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| 296 | * No need to check for overflow thanks to the length check above.
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| 297 | */
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| 298 | for( i = 0; i < q; i++ )
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| 299 | if( ++ctr[15-i] != 0 )
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| 300 | break;
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| 301 | }
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| 302 |
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| 303 | /*
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| 304 | * Authentication: reset counter and crypt/mask internal tag
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| 305 | */
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| 306 | for( i = 0; i < q; i++ )
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| 307 | ctr[15-i] = 0;
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| 308 |
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| 309 | CTR_CRYPT( y, y, 16 );
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| 310 | memcpy( tag, y, tag_len );
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| 311 |
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| 312 | return( 0 );
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| 313 | }
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| 314 |
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| 315 | /*
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| 316 | * Authenticated encryption
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| 317 | */
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| 318 | int mbedtls_ccm_star_encrypt_and_tag( mbedtls_ccm_context *ctx, size_t length,
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| 319 | const unsigned char *iv, size_t iv_len,
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| 320 | const unsigned char *add, size_t add_len,
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| 321 | const unsigned char *input, unsigned char *output,
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| 322 | unsigned char *tag, size_t tag_len )
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| 323 | {
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| 324 | CCM_VALIDATE_RET( ctx != NULL );
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| 325 | CCM_VALIDATE_RET( iv != NULL );
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| 326 | CCM_VALIDATE_RET( add_len == 0 || add != NULL );
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| 327 | CCM_VALIDATE_RET( length == 0 || input != NULL );
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| 328 | CCM_VALIDATE_RET( length == 0 || output != NULL );
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| 329 | CCM_VALIDATE_RET( tag_len == 0 || tag != NULL );
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| 330 | return( ccm_auth_crypt( ctx, CCM_ENCRYPT, length, iv, iv_len,
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| 331 | add, add_len, input, output, tag, tag_len ) );
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| 332 | }
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| 333 |
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| 334 | int mbedtls_ccm_encrypt_and_tag( mbedtls_ccm_context *ctx, size_t length,
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| 335 | const unsigned char *iv, size_t iv_len,
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| 336 | const unsigned char *add, size_t add_len,
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| 337 | const unsigned char *input, unsigned char *output,
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| 338 | unsigned char *tag, size_t tag_len )
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| 339 | {
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| 340 | CCM_VALIDATE_RET( ctx != NULL );
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| 341 | CCM_VALIDATE_RET( iv != NULL );
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| 342 | CCM_VALIDATE_RET( add_len == 0 || add != NULL );
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| 343 | CCM_VALIDATE_RET( length == 0 || input != NULL );
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| 344 | CCM_VALIDATE_RET( length == 0 || output != NULL );
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| 345 | CCM_VALIDATE_RET( tag_len == 0 || tag != NULL );
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| 346 | if( tag_len == 0 )
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| 347 | return( MBEDTLS_ERR_CCM_BAD_INPUT );
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| 348 |
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| 349 | return( mbedtls_ccm_star_encrypt_and_tag( ctx, length, iv, iv_len, add,
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| 350 | add_len, input, output, tag, tag_len ) );
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| 351 | }
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| 352 |
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| 353 | /*
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| 354 | * Authenticated decryption
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| 355 | */
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| 356 | int mbedtls_ccm_star_auth_decrypt( mbedtls_ccm_context *ctx, size_t length,
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| 357 | const unsigned char *iv, size_t iv_len,
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| 358 | const unsigned char *add, size_t add_len,
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| 359 | const unsigned char *input, unsigned char *output,
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| 360 | const unsigned char *tag, size_t tag_len )
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| 361 | {
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| 362 | int ret;
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| 363 | unsigned char check_tag[16];
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| 364 | unsigned char i;
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| 365 | int diff;
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| 366 |
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| 367 | CCM_VALIDATE_RET( ctx != NULL );
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| 368 | CCM_VALIDATE_RET( iv != NULL );
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| 369 | CCM_VALIDATE_RET( add_len == 0 || add != NULL );
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| 370 | CCM_VALIDATE_RET( length == 0 || input != NULL );
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| 371 | CCM_VALIDATE_RET( length == 0 || output != NULL );
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| 372 | CCM_VALIDATE_RET( tag_len == 0 || tag != NULL );
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| 373 |
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| 374 | if( ( ret = ccm_auth_crypt( ctx, CCM_DECRYPT, length,
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| 375 | iv, iv_len, add, add_len,
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| 376 | input, output, check_tag, tag_len ) ) != 0 )
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| 377 | {
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| 378 | return( ret );
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| 379 | }
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| 380 |
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| 381 | /* Check tag in "constant-time" */
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| 382 | for( diff = 0, i = 0; i < tag_len; i++ )
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| 383 | diff |= tag[i] ^ check_tag[i];
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| 384 |
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| 385 | if( diff != 0 )
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| 386 | {
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| 387 | mbedtls_platform_zeroize( output, length );
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| 388 | return( MBEDTLS_ERR_CCM_AUTH_FAILED );
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| 389 | }
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| 390 |
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| 391 | return( 0 );
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| 392 | }
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| 393 |
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| 394 | int mbedtls_ccm_auth_decrypt( mbedtls_ccm_context *ctx, size_t length,
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| 395 | const unsigned char *iv, size_t iv_len,
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| 396 | const unsigned char *add, size_t add_len,
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| 397 | const unsigned char *input, unsigned char *output,
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| 398 | const unsigned char *tag, size_t tag_len )
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| 399 | {
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| 400 | CCM_VALIDATE_RET( ctx != NULL );
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| 401 | CCM_VALIDATE_RET( iv != NULL );
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| 402 | CCM_VALIDATE_RET( add_len == 0 || add != NULL );
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| 403 | CCM_VALIDATE_RET( length == 0 || input != NULL );
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| 404 | CCM_VALIDATE_RET( length == 0 || output != NULL );
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| 405 | CCM_VALIDATE_RET( tag_len == 0 || tag != NULL );
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| 406 |
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| 407 | if( tag_len == 0 )
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| 408 | return( MBEDTLS_ERR_CCM_BAD_INPUT );
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| 409 |
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| 410 | return( mbedtls_ccm_star_auth_decrypt( ctx, length, iv, iv_len, add,
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| 411 | add_len, input, output, tag, tag_len ) );
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| 412 | }
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| 413 | #endif /* !MBEDTLS_CCM_ALT */
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| 414 |
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| 415 | #if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C)
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| 416 | /*
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| 417 | * Examples 1 to 3 from SP800-38C Appendix C
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| 418 | */
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| 419 |
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| 420 | #define NB_TESTS 3
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| 421 | #define CCM_SELFTEST_PT_MAX_LEN 24
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| 422 | #define CCM_SELFTEST_CT_MAX_LEN 32
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| 423 | /*
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| 424 | * The data is the same for all tests, only the used length changes
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| 425 | */
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| 426 | static const unsigned char key[] = {
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| 427 | 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
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| 428 | 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f
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| 429 | };
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| 430 |
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| 431 | static const unsigned char iv[] = {
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| 432 | 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
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| 433 | 0x18, 0x19, 0x1a, 0x1b
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| 434 | };
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| 435 |
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| 436 | static const unsigned char ad[] = {
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| 437 | 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
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| 438 | 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
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| 439 | 0x10, 0x11, 0x12, 0x13
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| 440 | };
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| 441 |
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| 442 | static const unsigned char msg[CCM_SELFTEST_PT_MAX_LEN] = {
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| 443 | 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
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| 444 | 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
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| 445 | 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
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| 446 | };
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| 447 |
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| 448 | static const size_t iv_len [NB_TESTS] = { 7, 8, 12 };
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| 449 | static const size_t add_len[NB_TESTS] = { 8, 16, 20 };
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| 450 | static const size_t msg_len[NB_TESTS] = { 4, 16, 24 };
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| 451 | static const size_t tag_len[NB_TESTS] = { 4, 6, 8 };
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| 452 |
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| 453 | static const unsigned char res[NB_TESTS][CCM_SELFTEST_CT_MAX_LEN] = {
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| 454 | { 0x71, 0x62, 0x01, 0x5b, 0x4d, 0xac, 0x25, 0x5d },
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| 455 | { 0xd2, 0xa1, 0xf0, 0xe0, 0x51, 0xea, 0x5f, 0x62,
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| 456 | 0x08, 0x1a, 0x77, 0x92, 0x07, 0x3d, 0x59, 0x3d,
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| 457 | 0x1f, 0xc6, 0x4f, 0xbf, 0xac, 0xcd },
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| 458 | { 0xe3, 0xb2, 0x01, 0xa9, 0xf5, 0xb7, 0x1a, 0x7a,
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| 459 | 0x9b, 0x1c, 0xea, 0xec, 0xcd, 0x97, 0xe7, 0x0b,
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| 460 | 0x61, 0x76, 0xaa, 0xd9, 0xa4, 0x42, 0x8a, 0xa5,
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| 461 | 0x48, 0x43, 0x92, 0xfb, 0xc1, 0xb0, 0x99, 0x51 }
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| 462 | };
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| 463 |
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| 464 | int mbedtls_ccm_self_test( int verbose )
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| 465 | {
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| 466 | mbedtls_ccm_context ctx;
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| 467 | /*
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| 468 | * Some hardware accelerators require the input and output buffers
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| 469 | * would be in RAM, because the flash is not accessible.
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| 470 | * Use buffers on the stack to hold the test vectors data.
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| 471 | */
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| 472 | unsigned char plaintext[CCM_SELFTEST_PT_MAX_LEN];
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| 473 | unsigned char ciphertext[CCM_SELFTEST_CT_MAX_LEN];
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| 474 | size_t i;
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| 475 | int ret;
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| 476 |
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| 477 | mbedtls_ccm_init( &ctx );
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| 478 |
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| 479 | if( mbedtls_ccm_setkey( &ctx, MBEDTLS_CIPHER_ID_AES, key, 8 * sizeof key ) != 0 )
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| 480 | {
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| 481 | if( verbose != 0 )
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| 482 | mbedtls_printf( " CCM: setup failed" );
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| 483 |
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| 484 | return( 1 );
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| 485 | }
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| 486 |
|
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| 487 | for( i = 0; i < NB_TESTS; i++ )
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| 488 | {
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| 489 | if( verbose != 0 )
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| 490 | mbedtls_printf( " CCM-AES #%u: ", (unsigned int) i + 1 );
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| 491 |
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| 492 | memset( plaintext, 0, CCM_SELFTEST_PT_MAX_LEN );
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| 493 | memset( ciphertext, 0, CCM_SELFTEST_CT_MAX_LEN );
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| 494 | memcpy( plaintext, msg, msg_len[i] );
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| 495 |
|
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| 496 | ret = mbedtls_ccm_encrypt_and_tag( &ctx, msg_len[i],
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| 497 | iv, iv_len[i], ad, add_len[i],
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| 498 | plaintext, ciphertext,
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| 499 | ciphertext + msg_len[i], tag_len[i] );
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| 500 |
|
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| 501 | if( ret != 0 ||
|
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| 502 | memcmp( ciphertext, res[i], msg_len[i] + tag_len[i] ) != 0 )
|
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| 503 | {
|
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| 504 | if( verbose != 0 )
|
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| 505 | mbedtls_printf( "failed\n" );
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| 506 |
|
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| 507 | return( 1 );
|
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| 508 | }
|
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| 509 | memset( plaintext, 0, CCM_SELFTEST_PT_MAX_LEN );
|
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| 510 |
|
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| 511 | ret = mbedtls_ccm_auth_decrypt( &ctx, msg_len[i],
|
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| 512 | iv, iv_len[i], ad, add_len[i],
|
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| 513 | ciphertext, plaintext,
|
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| 514 | ciphertext + msg_len[i], tag_len[i] );
|
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| 515 |
|
---|
| 516 | if( ret != 0 ||
|
---|
| 517 | memcmp( plaintext, msg, msg_len[i] ) != 0 )
|
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| 518 | {
|
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| 519 | if( verbose != 0 )
|
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| 520 | mbedtls_printf( "failed\n" );
|
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| 521 |
|
---|
| 522 | return( 1 );
|
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| 523 | }
|
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| 524 |
|
---|
| 525 | if( verbose != 0 )
|
---|
| 526 | mbedtls_printf( "passed\n" );
|
---|
| 527 | }
|
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| 528 |
|
---|
| 529 | mbedtls_ccm_free( &ctx );
|
---|
| 530 |
|
---|
| 531 | if( verbose != 0 )
|
---|
| 532 | mbedtls_printf( "\n" );
|
---|
| 533 |
|
---|
| 534 | return( 0 );
|
---|
| 535 | }
|
---|
| 536 |
|
---|
| 537 | #endif /* MBEDTLS_SELF_TEST && MBEDTLS_AES_C */
|
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| 538 |
|
---|
| 539 | #endif /* MBEDTLS_CCM_C */
|
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