[398] | 1 | /**
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| 2 | * \file chacha20.c
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| 3 | *
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| 4 | * \brief ChaCha20 cipher.
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| 5 | *
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| 6 | * \author Daniel King <damaki.gh@gmail.com>
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| 7 | *
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| 8 | * Copyright (C) 2006-2016, ARM Limited, All Rights Reserved
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| 9 | * SPDX-License-Identifier: Apache-2.0
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| 10 | *
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| 11 | * Licensed under the Apache License, Version 2.0 (the "License"); you may
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| 12 | * not use this file except in compliance with the License.
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| 13 | * You may obtain a copy of the License at
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| 14 | *
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| 15 | * http://www.apache.org/licenses/LICENSE-2.0
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| 16 | *
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| 17 | * Unless required by applicable law or agreed to in writing, software
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| 18 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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| 19 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 20 | * See the License for the specific language governing permissions and
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| 21 | * limitations under the License.
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| 22 | *
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| 23 | * This file is part of mbed TLS (https://tls.mbed.org)
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| 24 | */
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| 25 |
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| 26 | #if !defined(MBEDTLS_CONFIG_FILE)
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| 27 | #include "mbedtls/config.h"
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| 28 | #else
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| 29 | #include MBEDTLS_CONFIG_FILE
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| 30 | #endif
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| 31 |
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| 32 | #if defined(MBEDTLS_CHACHA20_C)
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| 33 |
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| 34 | #include "mbedtls/chacha20.h"
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| 35 | #include "mbedtls/platform_util.h"
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| 36 |
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| 37 | #include <stddef.h>
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| 38 | #include <string.h>
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| 39 |
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| 40 | #if defined(MBEDTLS_SELF_TEST)
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| 41 | #if defined(MBEDTLS_PLATFORM_C)
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| 42 | #include "mbedtls/platform.h"
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| 43 | #else
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| 44 | #include <stdio.h>
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| 45 | #define mbedtls_printf printf
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| 46 | #endif /* MBEDTLS_PLATFORM_C */
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| 47 | #endif /* MBEDTLS_SELF_TEST */
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| 48 |
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| 49 | #if !defined(MBEDTLS_CHACHA20_ALT)
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| 50 |
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| 51 | #if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \
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| 52 | !defined(inline) && !defined(__cplusplus)
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| 53 | #define inline __inline
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| 54 | #endif
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| 55 |
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| 56 | /* Parameter validation macros */
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| 57 | #define CHACHA20_VALIDATE_RET( cond ) \
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| 58 | MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_CHACHA20_BAD_INPUT_DATA )
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| 59 | #define CHACHA20_VALIDATE( cond ) \
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| 60 | MBEDTLS_INTERNAL_VALIDATE( cond )
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| 61 |
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| 62 | #define BYTES_TO_U32_LE( data, offset ) \
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| 63 | ( (uint32_t) data[offset] \
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| 64 | | (uint32_t) ( (uint32_t) data[( offset ) + 1] << 8 ) \
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| 65 | | (uint32_t) ( (uint32_t) data[( offset ) + 2] << 16 ) \
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| 66 | | (uint32_t) ( (uint32_t) data[( offset ) + 3] << 24 ) \
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| 67 | )
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| 68 |
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| 69 | #define ROTL32( value, amount ) \
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| 70 | ( (uint32_t) ( value << amount ) | ( value >> ( 32 - amount ) ) )
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| 71 |
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| 72 | #define CHACHA20_CTR_INDEX ( 12U )
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| 73 |
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| 74 | #define CHACHA20_BLOCK_SIZE_BYTES ( 4U * 16U )
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| 75 |
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| 76 | /**
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| 77 | * \brief ChaCha20 quarter round operation.
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| 78 | *
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| 79 | * The quarter round is defined as follows (from RFC 7539):
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| 80 | * 1. a += b; d ^= a; d <<<= 16;
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| 81 | * 2. c += d; b ^= c; b <<<= 12;
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| 82 | * 3. a += b; d ^= a; d <<<= 8;
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| 83 | * 4. c += d; b ^= c; b <<<= 7;
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| 84 | *
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| 85 | * \param state ChaCha20 state to modify.
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| 86 | * \param a The index of 'a' in the state.
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| 87 | * \param b The index of 'b' in the state.
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| 88 | * \param c The index of 'c' in the state.
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| 89 | * \param d The index of 'd' in the state.
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| 90 | */
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| 91 | static inline void chacha20_quarter_round( uint32_t state[16],
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| 92 | size_t a,
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| 93 | size_t b,
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| 94 | size_t c,
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| 95 | size_t d )
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| 96 | {
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| 97 | /* a += b; d ^= a; d <<<= 16; */
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| 98 | state[a] += state[b];
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| 99 | state[d] ^= state[a];
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| 100 | state[d] = ROTL32( state[d], 16 );
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| 101 |
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| 102 | /* c += d; b ^= c; b <<<= 12 */
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| 103 | state[c] += state[d];
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| 104 | state[b] ^= state[c];
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| 105 | state[b] = ROTL32( state[b], 12 );
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| 106 |
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| 107 | /* a += b; d ^= a; d <<<= 8; */
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| 108 | state[a] += state[b];
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| 109 | state[d] ^= state[a];
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| 110 | state[d] = ROTL32( state[d], 8 );
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| 111 |
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| 112 | /* c += d; b ^= c; b <<<= 7; */
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| 113 | state[c] += state[d];
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| 114 | state[b] ^= state[c];
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| 115 | state[b] = ROTL32( state[b], 7 );
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| 116 | }
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| 117 |
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| 118 | /**
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| 119 | * \brief Perform the ChaCha20 inner block operation.
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| 120 | *
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| 121 | * This function performs two rounds: the column round and the
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| 122 | * diagonal round.
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| 123 | *
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| 124 | * \param state The ChaCha20 state to update.
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| 125 | */
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| 126 | static void chacha20_inner_block( uint32_t state[16] )
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| 127 | {
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| 128 | chacha20_quarter_round( state, 0, 4, 8, 12 );
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| 129 | chacha20_quarter_round( state, 1, 5, 9, 13 );
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| 130 | chacha20_quarter_round( state, 2, 6, 10, 14 );
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| 131 | chacha20_quarter_round( state, 3, 7, 11, 15 );
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| 132 |
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| 133 | chacha20_quarter_round( state, 0, 5, 10, 15 );
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| 134 | chacha20_quarter_round( state, 1, 6, 11, 12 );
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| 135 | chacha20_quarter_round( state, 2, 7, 8, 13 );
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| 136 | chacha20_quarter_round( state, 3, 4, 9, 14 );
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| 137 | }
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| 138 |
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| 139 | /**
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| 140 | * \brief Generates a keystream block.
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| 141 | *
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| 142 | * \param initial_state The initial ChaCha20 state (key, nonce, counter).
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| 143 | * \param keystream Generated keystream bytes are written to this buffer.
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| 144 | */
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| 145 | static void chacha20_block( const uint32_t initial_state[16],
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| 146 | unsigned char keystream[64] )
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| 147 | {
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| 148 | uint32_t working_state[16];
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| 149 | size_t i;
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| 150 |
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| 151 | memcpy( working_state,
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| 152 | initial_state,
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| 153 | CHACHA20_BLOCK_SIZE_BYTES );
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| 154 |
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| 155 | for( i = 0U; i < 10U; i++ )
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| 156 | chacha20_inner_block( working_state );
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| 157 |
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| 158 | working_state[ 0] += initial_state[ 0];
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| 159 | working_state[ 1] += initial_state[ 1];
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| 160 | working_state[ 2] += initial_state[ 2];
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| 161 | working_state[ 3] += initial_state[ 3];
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| 162 | working_state[ 4] += initial_state[ 4];
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| 163 | working_state[ 5] += initial_state[ 5];
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| 164 | working_state[ 6] += initial_state[ 6];
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| 165 | working_state[ 7] += initial_state[ 7];
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| 166 | working_state[ 8] += initial_state[ 8];
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| 167 | working_state[ 9] += initial_state[ 9];
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| 168 | working_state[10] += initial_state[10];
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| 169 | working_state[11] += initial_state[11];
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| 170 | working_state[12] += initial_state[12];
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| 171 | working_state[13] += initial_state[13];
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| 172 | working_state[14] += initial_state[14];
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| 173 | working_state[15] += initial_state[15];
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| 174 |
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| 175 | for( i = 0U; i < 16; i++ )
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| 176 | {
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| 177 | size_t offset = i * 4U;
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| 178 |
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| 179 | keystream[offset ] = (unsigned char)( working_state[i] );
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| 180 | keystream[offset + 1U] = (unsigned char)( working_state[i] >> 8 );
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| 181 | keystream[offset + 2U] = (unsigned char)( working_state[i] >> 16 );
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| 182 | keystream[offset + 3U] = (unsigned char)( working_state[i] >> 24 );
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| 183 | }
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| 184 |
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| 185 | mbedtls_platform_zeroize( working_state, sizeof( working_state ) );
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| 186 | }
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| 187 |
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| 188 | void mbedtls_chacha20_init( mbedtls_chacha20_context *ctx )
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| 189 | {
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| 190 | CHACHA20_VALIDATE( ctx != NULL );
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| 191 |
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| 192 | mbedtls_platform_zeroize( ctx->state, sizeof( ctx->state ) );
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| 193 | mbedtls_platform_zeroize( ctx->keystream8, sizeof( ctx->keystream8 ) );
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| 194 |
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| 195 | /* Initially, there's no keystream bytes available */
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| 196 | ctx->keystream_bytes_used = CHACHA20_BLOCK_SIZE_BYTES;
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| 197 | }
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| 198 |
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| 199 | void mbedtls_chacha20_free( mbedtls_chacha20_context *ctx )
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| 200 | {
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| 201 | if( ctx != NULL )
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| 202 | {
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| 203 | mbedtls_platform_zeroize( ctx, sizeof( mbedtls_chacha20_context ) );
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| 204 | }
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| 205 | }
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| 206 |
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| 207 | int mbedtls_chacha20_setkey( mbedtls_chacha20_context *ctx,
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| 208 | const unsigned char key[32] )
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| 209 | {
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| 210 | CHACHA20_VALIDATE_RET( ctx != NULL );
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| 211 | CHACHA20_VALIDATE_RET( key != NULL );
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| 212 |
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| 213 | /* ChaCha20 constants - the string "expand 32-byte k" */
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| 214 | ctx->state[0] = 0x61707865;
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| 215 | ctx->state[1] = 0x3320646e;
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| 216 | ctx->state[2] = 0x79622d32;
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| 217 | ctx->state[3] = 0x6b206574;
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| 218 |
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| 219 | /* Set key */
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| 220 | ctx->state[4] = BYTES_TO_U32_LE( key, 0 );
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| 221 | ctx->state[5] = BYTES_TO_U32_LE( key, 4 );
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| 222 | ctx->state[6] = BYTES_TO_U32_LE( key, 8 );
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| 223 | ctx->state[7] = BYTES_TO_U32_LE( key, 12 );
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| 224 | ctx->state[8] = BYTES_TO_U32_LE( key, 16 );
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| 225 | ctx->state[9] = BYTES_TO_U32_LE( key, 20 );
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| 226 | ctx->state[10] = BYTES_TO_U32_LE( key, 24 );
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| 227 | ctx->state[11] = BYTES_TO_U32_LE( key, 28 );
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| 228 |
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| 229 | return( 0 );
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| 230 | }
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| 231 |
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| 232 | int mbedtls_chacha20_starts( mbedtls_chacha20_context* ctx,
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| 233 | const unsigned char nonce[12],
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| 234 | uint32_t counter )
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| 235 | {
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| 236 | CHACHA20_VALIDATE_RET( ctx != NULL );
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| 237 | CHACHA20_VALIDATE_RET( nonce != NULL );
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| 238 |
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| 239 | /* Counter */
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| 240 | ctx->state[12] = counter;
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| 241 |
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| 242 | /* Nonce */
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| 243 | ctx->state[13] = BYTES_TO_U32_LE( nonce, 0 );
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| 244 | ctx->state[14] = BYTES_TO_U32_LE( nonce, 4 );
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| 245 | ctx->state[15] = BYTES_TO_U32_LE( nonce, 8 );
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| 246 |
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| 247 | mbedtls_platform_zeroize( ctx->keystream8, sizeof( ctx->keystream8 ) );
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| 248 |
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| 249 | /* Initially, there's no keystream bytes available */
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| 250 | ctx->keystream_bytes_used = CHACHA20_BLOCK_SIZE_BYTES;
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| 251 |
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| 252 | return( 0 );
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| 253 | }
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| 254 |
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| 255 | int mbedtls_chacha20_update( mbedtls_chacha20_context *ctx,
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| 256 | size_t size,
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| 257 | const unsigned char *input,
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| 258 | unsigned char *output )
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| 259 | {
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| 260 | size_t offset = 0U;
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| 261 | size_t i;
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| 262 |
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| 263 | CHACHA20_VALIDATE_RET( ctx != NULL );
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| 264 | CHACHA20_VALIDATE_RET( size == 0 || input != NULL );
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| 265 | CHACHA20_VALIDATE_RET( size == 0 || output != NULL );
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| 266 |
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| 267 | /* Use leftover keystream bytes, if available */
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| 268 | while( size > 0U && ctx->keystream_bytes_used < CHACHA20_BLOCK_SIZE_BYTES )
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| 269 | {
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| 270 | output[offset] = input[offset]
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| 271 | ^ ctx->keystream8[ctx->keystream_bytes_used];
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| 272 |
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| 273 | ctx->keystream_bytes_used++;
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| 274 | offset++;
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| 275 | size--;
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| 276 | }
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| 277 |
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| 278 | /* Process full blocks */
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| 279 | while( size >= CHACHA20_BLOCK_SIZE_BYTES )
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| 280 | {
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| 281 | /* Generate new keystream block and increment counter */
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| 282 | chacha20_block( ctx->state, ctx->keystream8 );
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| 283 | ctx->state[CHACHA20_CTR_INDEX]++;
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| 284 |
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| 285 | for( i = 0U; i < 64U; i += 8U )
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| 286 | {
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| 287 | output[offset + i ] = input[offset + i ] ^ ctx->keystream8[i ];
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| 288 | output[offset + i+1] = input[offset + i+1] ^ ctx->keystream8[i+1];
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| 289 | output[offset + i+2] = input[offset + i+2] ^ ctx->keystream8[i+2];
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| 290 | output[offset + i+3] = input[offset + i+3] ^ ctx->keystream8[i+3];
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| 291 | output[offset + i+4] = input[offset + i+4] ^ ctx->keystream8[i+4];
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| 292 | output[offset + i+5] = input[offset + i+5] ^ ctx->keystream8[i+5];
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| 293 | output[offset + i+6] = input[offset + i+6] ^ ctx->keystream8[i+6];
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| 294 | output[offset + i+7] = input[offset + i+7] ^ ctx->keystream8[i+7];
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| 295 | }
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| 296 |
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| 297 | offset += CHACHA20_BLOCK_SIZE_BYTES;
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| 298 | size -= CHACHA20_BLOCK_SIZE_BYTES;
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| 299 | }
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| 300 |
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| 301 | /* Last (partial) block */
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| 302 | if( size > 0U )
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| 303 | {
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| 304 | /* Generate new keystream block and increment counter */
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| 305 | chacha20_block( ctx->state, ctx->keystream8 );
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| 306 | ctx->state[CHACHA20_CTR_INDEX]++;
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| 307 |
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| 308 | for( i = 0U; i < size; i++)
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| 309 | {
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| 310 | output[offset + i] = input[offset + i] ^ ctx->keystream8[i];
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| 311 | }
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| 312 |
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| 313 | ctx->keystream_bytes_used = size;
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| 314 |
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| 315 | }
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| 316 |
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| 317 | return( 0 );
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| 318 | }
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| 319 |
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| 320 | int mbedtls_chacha20_crypt( const unsigned char key[32],
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| 321 | const unsigned char nonce[12],
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| 322 | uint32_t counter,
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| 323 | size_t data_len,
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| 324 | const unsigned char* input,
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| 325 | unsigned char* output )
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| 326 | {
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| 327 | mbedtls_chacha20_context ctx;
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| 328 | int ret;
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| 329 |
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| 330 | CHACHA20_VALIDATE_RET( key != NULL );
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| 331 | CHACHA20_VALIDATE_RET( nonce != NULL );
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| 332 | CHACHA20_VALIDATE_RET( data_len == 0 || input != NULL );
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| 333 | CHACHA20_VALIDATE_RET( data_len == 0 || output != NULL );
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| 334 |
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| 335 | mbedtls_chacha20_init( &ctx );
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| 336 |
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| 337 | ret = mbedtls_chacha20_setkey( &ctx, key );
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| 338 | if( ret != 0 )
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| 339 | goto cleanup;
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| 340 |
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| 341 | ret = mbedtls_chacha20_starts( &ctx, nonce, counter );
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| 342 | if( ret != 0 )
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| 343 | goto cleanup;
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| 344 |
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| 345 | ret = mbedtls_chacha20_update( &ctx, data_len, input, output );
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| 346 |
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| 347 | cleanup:
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| 348 | mbedtls_chacha20_free( &ctx );
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| 349 | return( ret );
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| 350 | }
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| 351 |
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| 352 | #endif /* !MBEDTLS_CHACHA20_ALT */
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| 353 |
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| 354 | #if defined(MBEDTLS_SELF_TEST)
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| 355 |
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| 356 | static const unsigned char test_keys[2][32] =
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| 357 | {
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| 358 | {
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| 359 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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| 360 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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| 361 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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| 362 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
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| 363 | },
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| 364 | {
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| 365 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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| 366 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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| 367 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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| 368 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01
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| 369 | }
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| 370 | };
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| 371 |
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| 372 | static const unsigned char test_nonces[2][12] =
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| 373 | {
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| 374 | {
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| 375 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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| 376 | 0x00, 0x00, 0x00, 0x00
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| 377 | },
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| 378 | {
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| 379 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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| 380 | 0x00, 0x00, 0x00, 0x02
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| 381 | }
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| 382 | };
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| 383 |
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| 384 | static const uint32_t test_counters[2] =
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| 385 | {
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| 386 | 0U,
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| 387 | 1U
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| 388 | };
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| 389 |
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| 390 | static const unsigned char test_input[2][375] =
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| 391 | {
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| 392 | {
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| 393 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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| 394 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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| 395 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
---|
| 396 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
---|
| 397 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
---|
| 398 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
---|
| 399 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
---|
| 400 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
|
---|
| 401 | },
|
---|
| 402 | {
|
---|
| 403 | 0x41, 0x6e, 0x79, 0x20, 0x73, 0x75, 0x62, 0x6d,
|
---|
| 404 | 0x69, 0x73, 0x73, 0x69, 0x6f, 0x6e, 0x20, 0x74,
|
---|
| 405 | 0x6f, 0x20, 0x74, 0x68, 0x65, 0x20, 0x49, 0x45,
|
---|
| 406 | 0x54, 0x46, 0x20, 0x69, 0x6e, 0x74, 0x65, 0x6e,
|
---|
| 407 | 0x64, 0x65, 0x64, 0x20, 0x62, 0x79, 0x20, 0x74,
|
---|
| 408 | 0x68, 0x65, 0x20, 0x43, 0x6f, 0x6e, 0x74, 0x72,
|
---|
| 409 | 0x69, 0x62, 0x75, 0x74, 0x6f, 0x72, 0x20, 0x66,
|
---|
| 410 | 0x6f, 0x72, 0x20, 0x70, 0x75, 0x62, 0x6c, 0x69,
|
---|
| 411 | 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x20, 0x61,
|
---|
| 412 | 0x73, 0x20, 0x61, 0x6c, 0x6c, 0x20, 0x6f, 0x72,
|
---|
| 413 | 0x20, 0x70, 0x61, 0x72, 0x74, 0x20, 0x6f, 0x66,
|
---|
| 414 | 0x20, 0x61, 0x6e, 0x20, 0x49, 0x45, 0x54, 0x46,
|
---|
| 415 | 0x20, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65,
|
---|
| 416 | 0x74, 0x2d, 0x44, 0x72, 0x61, 0x66, 0x74, 0x20,
|
---|
| 417 | 0x6f, 0x72, 0x20, 0x52, 0x46, 0x43, 0x20, 0x61,
|
---|
| 418 | 0x6e, 0x64, 0x20, 0x61, 0x6e, 0x79, 0x20, 0x73,
|
---|
| 419 | 0x74, 0x61, 0x74, 0x65, 0x6d, 0x65, 0x6e, 0x74,
|
---|
| 420 | 0x20, 0x6d, 0x61, 0x64, 0x65, 0x20, 0x77, 0x69,
|
---|
| 421 | 0x74, 0x68, 0x69, 0x6e, 0x20, 0x74, 0x68, 0x65,
|
---|
| 422 | 0x20, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x78, 0x74,
|
---|
| 423 | 0x20, 0x6f, 0x66, 0x20, 0x61, 0x6e, 0x20, 0x49,
|
---|
| 424 | 0x45, 0x54, 0x46, 0x20, 0x61, 0x63, 0x74, 0x69,
|
---|
| 425 | 0x76, 0x69, 0x74, 0x79, 0x20, 0x69, 0x73, 0x20,
|
---|
| 426 | 0x63, 0x6f, 0x6e, 0x73, 0x69, 0x64, 0x65, 0x72,
|
---|
| 427 | 0x65, 0x64, 0x20, 0x61, 0x6e, 0x20, 0x22, 0x49,
|
---|
| 428 | 0x45, 0x54, 0x46, 0x20, 0x43, 0x6f, 0x6e, 0x74,
|
---|
| 429 | 0x72, 0x69, 0x62, 0x75, 0x74, 0x69, 0x6f, 0x6e,
|
---|
| 430 | 0x22, 0x2e, 0x20, 0x53, 0x75, 0x63, 0x68, 0x20,
|
---|
| 431 | 0x73, 0x74, 0x61, 0x74, 0x65, 0x6d, 0x65, 0x6e,
|
---|
| 432 | 0x74, 0x73, 0x20, 0x69, 0x6e, 0x63, 0x6c, 0x75,
|
---|
| 433 | 0x64, 0x65, 0x20, 0x6f, 0x72, 0x61, 0x6c, 0x20,
|
---|
| 434 | 0x73, 0x74, 0x61, 0x74, 0x65, 0x6d, 0x65, 0x6e,
|
---|
| 435 | 0x74, 0x73, 0x20, 0x69, 0x6e, 0x20, 0x49, 0x45,
|
---|
| 436 | 0x54, 0x46, 0x20, 0x73, 0x65, 0x73, 0x73, 0x69,
|
---|
| 437 | 0x6f, 0x6e, 0x73, 0x2c, 0x20, 0x61, 0x73, 0x20,
|
---|
| 438 | 0x77, 0x65, 0x6c, 0x6c, 0x20, 0x61, 0x73, 0x20,
|
---|
| 439 | 0x77, 0x72, 0x69, 0x74, 0x74, 0x65, 0x6e, 0x20,
|
---|
| 440 | 0x61, 0x6e, 0x64, 0x20, 0x65, 0x6c, 0x65, 0x63,
|
---|
| 441 | 0x74, 0x72, 0x6f, 0x6e, 0x69, 0x63, 0x20, 0x63,
|
---|
| 442 | 0x6f, 0x6d, 0x6d, 0x75, 0x6e, 0x69, 0x63, 0x61,
|
---|
| 443 | 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x20, 0x6d, 0x61,
|
---|
| 444 | 0x64, 0x65, 0x20, 0x61, 0x74, 0x20, 0x61, 0x6e,
|
---|
| 445 | 0x79, 0x20, 0x74, 0x69, 0x6d, 0x65, 0x20, 0x6f,
|
---|
| 446 | 0x72, 0x20, 0x70, 0x6c, 0x61, 0x63, 0x65, 0x2c,
|
---|
| 447 | 0x20, 0x77, 0x68, 0x69, 0x63, 0x68, 0x20, 0x61,
|
---|
| 448 | 0x72, 0x65, 0x20, 0x61, 0x64, 0x64, 0x72, 0x65,
|
---|
| 449 | 0x73, 0x73, 0x65, 0x64, 0x20, 0x74, 0x6f
|
---|
| 450 | }
|
---|
| 451 | };
|
---|
| 452 |
|
---|
| 453 | static const unsigned char test_output[2][375] =
|
---|
| 454 | {
|
---|
| 455 | {
|
---|
| 456 | 0x76, 0xb8, 0xe0, 0xad, 0xa0, 0xf1, 0x3d, 0x90,
|
---|
| 457 | 0x40, 0x5d, 0x6a, 0xe5, 0x53, 0x86, 0xbd, 0x28,
|
---|
| 458 | 0xbd, 0xd2, 0x19, 0xb8, 0xa0, 0x8d, 0xed, 0x1a,
|
---|
| 459 | 0xa8, 0x36, 0xef, 0xcc, 0x8b, 0x77, 0x0d, 0xc7,
|
---|
| 460 | 0xda, 0x41, 0x59, 0x7c, 0x51, 0x57, 0x48, 0x8d,
|
---|
| 461 | 0x77, 0x24, 0xe0, 0x3f, 0xb8, 0xd8, 0x4a, 0x37,
|
---|
| 462 | 0x6a, 0x43, 0xb8, 0xf4, 0x15, 0x18, 0xa1, 0x1c,
|
---|
| 463 | 0xc3, 0x87, 0xb6, 0x69, 0xb2, 0xee, 0x65, 0x86
|
---|
| 464 | },
|
---|
| 465 | {
|
---|
| 466 | 0xa3, 0xfb, 0xf0, 0x7d, 0xf3, 0xfa, 0x2f, 0xde,
|
---|
| 467 | 0x4f, 0x37, 0x6c, 0xa2, 0x3e, 0x82, 0x73, 0x70,
|
---|
| 468 | 0x41, 0x60, 0x5d, 0x9f, 0x4f, 0x4f, 0x57, 0xbd,
|
---|
| 469 | 0x8c, 0xff, 0x2c, 0x1d, 0x4b, 0x79, 0x55, 0xec,
|
---|
| 470 | 0x2a, 0x97, 0x94, 0x8b, 0xd3, 0x72, 0x29, 0x15,
|
---|
| 471 | 0xc8, 0xf3, 0xd3, 0x37, 0xf7, 0xd3, 0x70, 0x05,
|
---|
| 472 | 0x0e, 0x9e, 0x96, 0xd6, 0x47, 0xb7, 0xc3, 0x9f,
|
---|
| 473 | 0x56, 0xe0, 0x31, 0xca, 0x5e, 0xb6, 0x25, 0x0d,
|
---|
| 474 | 0x40, 0x42, 0xe0, 0x27, 0x85, 0xec, 0xec, 0xfa,
|
---|
| 475 | 0x4b, 0x4b, 0xb5, 0xe8, 0xea, 0xd0, 0x44, 0x0e,
|
---|
| 476 | 0x20, 0xb6, 0xe8, 0xdb, 0x09, 0xd8, 0x81, 0xa7,
|
---|
| 477 | 0xc6, 0x13, 0x2f, 0x42, 0x0e, 0x52, 0x79, 0x50,
|
---|
| 478 | 0x42, 0xbd, 0xfa, 0x77, 0x73, 0xd8, 0xa9, 0x05,
|
---|
| 479 | 0x14, 0x47, 0xb3, 0x29, 0x1c, 0xe1, 0x41, 0x1c,
|
---|
| 480 | 0x68, 0x04, 0x65, 0x55, 0x2a, 0xa6, 0xc4, 0x05,
|
---|
| 481 | 0xb7, 0x76, 0x4d, 0x5e, 0x87, 0xbe, 0xa8, 0x5a,
|
---|
| 482 | 0xd0, 0x0f, 0x84, 0x49, 0xed, 0x8f, 0x72, 0xd0,
|
---|
| 483 | 0xd6, 0x62, 0xab, 0x05, 0x26, 0x91, 0xca, 0x66,
|
---|
| 484 | 0x42, 0x4b, 0xc8, 0x6d, 0x2d, 0xf8, 0x0e, 0xa4,
|
---|
| 485 | 0x1f, 0x43, 0xab, 0xf9, 0x37, 0xd3, 0x25, 0x9d,
|
---|
| 486 | 0xc4, 0xb2, 0xd0, 0xdf, 0xb4, 0x8a, 0x6c, 0x91,
|
---|
| 487 | 0x39, 0xdd, 0xd7, 0xf7, 0x69, 0x66, 0xe9, 0x28,
|
---|
| 488 | 0xe6, 0x35, 0x55, 0x3b, 0xa7, 0x6c, 0x5c, 0x87,
|
---|
| 489 | 0x9d, 0x7b, 0x35, 0xd4, 0x9e, 0xb2, 0xe6, 0x2b,
|
---|
| 490 | 0x08, 0x71, 0xcd, 0xac, 0x63, 0x89, 0x39, 0xe2,
|
---|
| 491 | 0x5e, 0x8a, 0x1e, 0x0e, 0xf9, 0xd5, 0x28, 0x0f,
|
---|
| 492 | 0xa8, 0xca, 0x32, 0x8b, 0x35, 0x1c, 0x3c, 0x76,
|
---|
| 493 | 0x59, 0x89, 0xcb, 0xcf, 0x3d, 0xaa, 0x8b, 0x6c,
|
---|
| 494 | 0xcc, 0x3a, 0xaf, 0x9f, 0x39, 0x79, 0xc9, 0x2b,
|
---|
| 495 | 0x37, 0x20, 0xfc, 0x88, 0xdc, 0x95, 0xed, 0x84,
|
---|
| 496 | 0xa1, 0xbe, 0x05, 0x9c, 0x64, 0x99, 0xb9, 0xfd,
|
---|
| 497 | 0xa2, 0x36, 0xe7, 0xe8, 0x18, 0xb0, 0x4b, 0x0b,
|
---|
| 498 | 0xc3, 0x9c, 0x1e, 0x87, 0x6b, 0x19, 0x3b, 0xfe,
|
---|
| 499 | 0x55, 0x69, 0x75, 0x3f, 0x88, 0x12, 0x8c, 0xc0,
|
---|
| 500 | 0x8a, 0xaa, 0x9b, 0x63, 0xd1, 0xa1, 0x6f, 0x80,
|
---|
| 501 | 0xef, 0x25, 0x54, 0xd7, 0x18, 0x9c, 0x41, 0x1f,
|
---|
| 502 | 0x58, 0x69, 0xca, 0x52, 0xc5, 0xb8, 0x3f, 0xa3,
|
---|
| 503 | 0x6f, 0xf2, 0x16, 0xb9, 0xc1, 0xd3, 0x00, 0x62,
|
---|
| 504 | 0xbe, 0xbc, 0xfd, 0x2d, 0xc5, 0xbc, 0xe0, 0x91,
|
---|
| 505 | 0x19, 0x34, 0xfd, 0xa7, 0x9a, 0x86, 0xf6, 0xe6,
|
---|
| 506 | 0x98, 0xce, 0xd7, 0x59, 0xc3, 0xff, 0x9b, 0x64,
|
---|
| 507 | 0x77, 0x33, 0x8f, 0x3d, 0xa4, 0xf9, 0xcd, 0x85,
|
---|
| 508 | 0x14, 0xea, 0x99, 0x82, 0xcc, 0xaf, 0xb3, 0x41,
|
---|
| 509 | 0xb2, 0x38, 0x4d, 0xd9, 0x02, 0xf3, 0xd1, 0xab,
|
---|
| 510 | 0x7a, 0xc6, 0x1d, 0xd2, 0x9c, 0x6f, 0x21, 0xba,
|
---|
| 511 | 0x5b, 0x86, 0x2f, 0x37, 0x30, 0xe3, 0x7c, 0xfd,
|
---|
| 512 | 0xc4, 0xfd, 0x80, 0x6c, 0x22, 0xf2, 0x21
|
---|
| 513 | }
|
---|
| 514 | };
|
---|
| 515 |
|
---|
| 516 | static const size_t test_lengths[2] =
|
---|
| 517 | {
|
---|
| 518 | 64U,
|
---|
| 519 | 375U
|
---|
| 520 | };
|
---|
| 521 |
|
---|
| 522 | #define ASSERT( cond, args ) \
|
---|
| 523 | do \
|
---|
| 524 | { \
|
---|
| 525 | if( ! ( cond ) ) \
|
---|
| 526 | { \
|
---|
| 527 | if( verbose != 0 ) \
|
---|
| 528 | mbedtls_printf args; \
|
---|
| 529 | \
|
---|
| 530 | return( -1 ); \
|
---|
| 531 | } \
|
---|
| 532 | } \
|
---|
| 533 | while( 0 )
|
---|
| 534 |
|
---|
| 535 | int mbedtls_chacha20_self_test( int verbose )
|
---|
| 536 | {
|
---|
| 537 | unsigned char output[381];
|
---|
| 538 | unsigned i;
|
---|
| 539 | int ret;
|
---|
| 540 |
|
---|
| 541 | for( i = 0U; i < 2U; i++ )
|
---|
| 542 | {
|
---|
| 543 | if( verbose != 0 )
|
---|
| 544 | mbedtls_printf( " ChaCha20 test %u ", i );
|
---|
| 545 |
|
---|
| 546 | ret = mbedtls_chacha20_crypt( test_keys[i],
|
---|
| 547 | test_nonces[i],
|
---|
| 548 | test_counters[i],
|
---|
| 549 | test_lengths[i],
|
---|
| 550 | test_input[i],
|
---|
| 551 | output );
|
---|
| 552 |
|
---|
| 553 | ASSERT( 0 == ret, ( "error code: %i\n", ret ) );
|
---|
| 554 |
|
---|
| 555 | ASSERT( 0 == memcmp( output, test_output[i], test_lengths[i] ),
|
---|
| 556 | ( "failed (output)\n" ) );
|
---|
| 557 |
|
---|
| 558 | if( verbose != 0 )
|
---|
| 559 | mbedtls_printf( "passed\n" );
|
---|
| 560 | }
|
---|
| 561 |
|
---|
| 562 | if( verbose != 0 )
|
---|
| 563 | mbedtls_printf( "\n" );
|
---|
| 564 |
|
---|
| 565 | return( 0 );
|
---|
| 566 | }
|
---|
| 567 |
|
---|
| 568 | #endif /* MBEDTLS_SELF_TEST */
|
---|
| 569 |
|
---|
| 570 | #endif /* !MBEDTLS_CHACHA20_C */
|
---|