Avnet / WNCInterface

The WDCInterface is is a drop-in replacement for an EthernetInterface class that allows the user to connect to the Internet with a Wistron NeWeb Corporation (WNC) M14A2A Series data module using the standard network Socket API's. This interface class is used in the AT&T Cellular IoT Starter Kit which is sold by Avnet (http://cloudconnectkits.org/product/att-cellular-iot-starter-kit).

Dependencies:   WncControllerK64F

Dependents:   WNCProximityMqtt Pubnub_ATT_IoT_SK_WNC_sync BluemixDemo BluemixQS ... more

See the WNCInterface README in the Wiki tab for detailed information on this library.

mbedtls/source/arc4.c@12:0071cb144c7a, 2016-11-01 (annotated)

Committer:
JMF
Date:
Tue Nov 01 14:22:56 2016 +0000
Revision:
12:0071cb144c7a
Adding mbedtls files

Who changed what in which revision?

UserRevisionLine numberNew contents of line
JMF 12:0071cb144c7a 1 /*
JMF 12:0071cb144c7a 2 * An implementation of the ARCFOUR algorithm
JMF 12:0071cb144c7a 3 *
JMF 12:0071cb144c7a 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
JMF 12:0071cb144c7a 5 * SPDX-License-Identifier: Apache-2.0
JMF 12:0071cb144c7a 6 *
JMF 12:0071cb144c7a 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
JMF 12:0071cb144c7a 8 * not use this file except in compliance with the License.
JMF 12:0071cb144c7a 9 * You may obtain a copy of the License at
JMF 12:0071cb144c7a 10 *
JMF 12:0071cb144c7a 11 * http://www.apache.org/licenses/LICENSE-2.0
JMF 12:0071cb144c7a 12 *
JMF 12:0071cb144c7a 13 * Unless required by applicable law or agreed to in writing, software
JMF 12:0071cb144c7a 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
JMF 12:0071cb144c7a 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
JMF 12:0071cb144c7a 16 * See the License for the specific language governing permissions and
JMF 12:0071cb144c7a 17 * limitations under the License.
JMF 12:0071cb144c7a 18 *
JMF 12:0071cb144c7a 19 * This file is part of mbed TLS (https://tls.mbed.org)
JMF 12:0071cb144c7a 20 */
JMF 12:0071cb144c7a 21 /*
JMF 12:0071cb144c7a 22 * The ARCFOUR algorithm was publicly disclosed on 94/09.
JMF 12:0071cb144c7a 23 *
JMF 12:0071cb144c7a 24 * http://groups.google.com/group/sci.crypt/msg/10a300c9d21afca0
JMF 12:0071cb144c7a 25 */
JMF 12:0071cb144c7a 26
JMF 12:0071cb144c7a 27 #if !defined(MBEDTLS_CONFIG_FILE)
JMF 12:0071cb144c7a 28 #include "mbedtls/config.h"
JMF 12:0071cb144c7a 29 #else
JMF 12:0071cb144c7a 30 #include MBEDTLS_CONFIG_FILE
JMF 12:0071cb144c7a 31 #endif
JMF 12:0071cb144c7a 32
JMF 12:0071cb144c7a 33 #if defined(MBEDTLS_ARC4_C)
JMF 12:0071cb144c7a 34
JMF 12:0071cb144c7a 35 #include "mbedtls/arc4.h"
JMF 12:0071cb144c7a 36
JMF 12:0071cb144c7a 37 #include <string.h>
JMF 12:0071cb144c7a 38
JMF 12:0071cb144c7a 39 #if defined(MBEDTLS_SELF_TEST)
JMF 12:0071cb144c7a 40 #if defined(MBEDTLS_PLATFORM_C)
JMF 12:0071cb144c7a 41 #include "mbedtls/platform.h"
JMF 12:0071cb144c7a 42 #else
JMF 12:0071cb144c7a 43 #include <stdio.h>
JMF 12:0071cb144c7a 44 #define mbedtls_printf printf
JMF 12:0071cb144c7a 45 #endif /* MBEDTLS_PLATFORM_C */
JMF 12:0071cb144c7a 46 #endif /* MBEDTLS_SELF_TEST */
JMF 12:0071cb144c7a 47
JMF 12:0071cb144c7a 48 #if !defined(MBEDTLS_ARC4_ALT)
JMF 12:0071cb144c7a 49
JMF 12:0071cb144c7a 50 /* Implementation that should never be optimized out by the compiler */
JMF 12:0071cb144c7a 51 static void mbedtls_zeroize( void *v, size_t n ) {
JMF 12:0071cb144c7a 52 volatile unsigned char *p = (unsigned char*)v; while( n-- ) *p++ = 0;
JMF 12:0071cb144c7a 53 }
JMF 12:0071cb144c7a 54
JMF 12:0071cb144c7a 55 void mbedtls_arc4_init( mbedtls_arc4_context *ctx )
JMF 12:0071cb144c7a 56 {
JMF 12:0071cb144c7a 57 memset( ctx, 0, sizeof( mbedtls_arc4_context ) );
JMF 12:0071cb144c7a 58 }
JMF 12:0071cb144c7a 59
JMF 12:0071cb144c7a 60 void mbedtls_arc4_free( mbedtls_arc4_context *ctx )
JMF 12:0071cb144c7a 61 {
JMF 12:0071cb144c7a 62 if( ctx == NULL )
JMF 12:0071cb144c7a 63 return;
JMF 12:0071cb144c7a 64
JMF 12:0071cb144c7a 65 mbedtls_zeroize( ctx, sizeof( mbedtls_arc4_context ) );
JMF 12:0071cb144c7a 66 }
JMF 12:0071cb144c7a 67
JMF 12:0071cb144c7a 68 /*
JMF 12:0071cb144c7a 69 * ARC4 key schedule
JMF 12:0071cb144c7a 70 */
JMF 12:0071cb144c7a 71 void mbedtls_arc4_setup( mbedtls_arc4_context *ctx, const unsigned char *key,
JMF 12:0071cb144c7a 72 unsigned int keylen )
JMF 12:0071cb144c7a 73 {
JMF 12:0071cb144c7a 74 int i, j, a;
JMF 12:0071cb144c7a 75 unsigned int k;
JMF 12:0071cb144c7a 76 unsigned char *m;
JMF 12:0071cb144c7a 77
JMF 12:0071cb144c7a 78 ctx->x = 0;
JMF 12:0071cb144c7a 79 ctx->y = 0;
JMF 12:0071cb144c7a 80 m = ctx->m;
JMF 12:0071cb144c7a 81
JMF 12:0071cb144c7a 82 for( i = 0; i < 256; i++ )
JMF 12:0071cb144c7a 83 m[i] = (unsigned char) i;
JMF 12:0071cb144c7a 84
JMF 12:0071cb144c7a 85 j = k = 0;
JMF 12:0071cb144c7a 86
JMF 12:0071cb144c7a 87 for( i = 0; i < 256; i++, k++ )
JMF 12:0071cb144c7a 88 {
JMF 12:0071cb144c7a 89 if( k >= keylen ) k = 0;
JMF 12:0071cb144c7a 90
JMF 12:0071cb144c7a 91 a = m[i];
JMF 12:0071cb144c7a 92 j = ( j + a + key[k] ) & 0xFF;
JMF 12:0071cb144c7a 93 m[i] = m[j];
JMF 12:0071cb144c7a 94 m[j] = (unsigned char) a;
JMF 12:0071cb144c7a 95 }
JMF 12:0071cb144c7a 96 }
JMF 12:0071cb144c7a 97
JMF 12:0071cb144c7a 98 /*
JMF 12:0071cb144c7a 99 * ARC4 cipher function
JMF 12:0071cb144c7a 100 */
JMF 12:0071cb144c7a 101 int mbedtls_arc4_crypt( mbedtls_arc4_context *ctx, size_t length, const unsigned char *input,
JMF 12:0071cb144c7a 102 unsigned char *output )
JMF 12:0071cb144c7a 103 {
JMF 12:0071cb144c7a 104 int x, y, a, b;
JMF 12:0071cb144c7a 105 size_t i;
JMF 12:0071cb144c7a 106 unsigned char *m;
JMF 12:0071cb144c7a 107
JMF 12:0071cb144c7a 108 x = ctx->x;
JMF 12:0071cb144c7a 109 y = ctx->y;
JMF 12:0071cb144c7a 110 m = ctx->m;
JMF 12:0071cb144c7a 111
JMF 12:0071cb144c7a 112 for( i = 0; i < length; i++ )
JMF 12:0071cb144c7a 113 {
JMF 12:0071cb144c7a 114 x = ( x + 1 ) & 0xFF; a = m[x];
JMF 12:0071cb144c7a 115 y = ( y + a ) & 0xFF; b = m[y];
JMF 12:0071cb144c7a 116
JMF 12:0071cb144c7a 117 m[x] = (unsigned char) b;
JMF 12:0071cb144c7a 118 m[y] = (unsigned char) a;
JMF 12:0071cb144c7a 119
JMF 12:0071cb144c7a 120 output[i] = (unsigned char)
JMF 12:0071cb144c7a 121 ( input[i] ^ m[(unsigned char)( a + b )] );
JMF 12:0071cb144c7a 122 }
JMF 12:0071cb144c7a 123
JMF 12:0071cb144c7a 124 ctx->x = x;
JMF 12:0071cb144c7a 125 ctx->y = y;
JMF 12:0071cb144c7a 126
JMF 12:0071cb144c7a 127 return( 0 );
JMF 12:0071cb144c7a 128 }
JMF 12:0071cb144c7a 129
JMF 12:0071cb144c7a 130 #endif /* !MBEDTLS_ARC4_ALT */
JMF 12:0071cb144c7a 131
JMF 12:0071cb144c7a 132 #if defined(MBEDTLS_SELF_TEST)
JMF 12:0071cb144c7a 133 /*
JMF 12:0071cb144c7a 134 * ARC4 tests vectors as posted by Eric Rescorla in sep. 1994:
JMF 12:0071cb144c7a 135 *
JMF 12:0071cb144c7a 136 * http://groups.google.com/group/comp.security.misc/msg/10a300c9d21afca0
JMF 12:0071cb144c7a 137 */
JMF 12:0071cb144c7a 138 static const unsigned char arc4_test_key[3][8] =
JMF 12:0071cb144c7a 139 {
JMF 12:0071cb144c7a 140 { 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF },
JMF 12:0071cb144c7a 141 { 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF },
JMF 12:0071cb144c7a 142 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }
JMF 12:0071cb144c7a 143 };
JMF 12:0071cb144c7a 144
JMF 12:0071cb144c7a 145 static const unsigned char arc4_test_pt[3][8] =
JMF 12:0071cb144c7a 146 {
JMF 12:0071cb144c7a 147 { 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF },
JMF 12:0071cb144c7a 148 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
JMF 12:0071cb144c7a 149 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }
JMF 12:0071cb144c7a 150 };
JMF 12:0071cb144c7a 151
JMF 12:0071cb144c7a 152 static const unsigned char arc4_test_ct[3][8] =
JMF 12:0071cb144c7a 153 {
JMF 12:0071cb144c7a 154 { 0x75, 0xB7, 0x87, 0x80, 0x99, 0xE0, 0xC5, 0x96 },
JMF 12:0071cb144c7a 155 { 0x74, 0x94, 0xC2, 0xE7, 0x10, 0x4B, 0x08, 0x79 },
JMF 12:0071cb144c7a 156 { 0xDE, 0x18, 0x89, 0x41, 0xA3, 0x37, 0x5D, 0x3A }
JMF 12:0071cb144c7a 157 };
JMF 12:0071cb144c7a 158
JMF 12:0071cb144c7a 159 /*
JMF 12:0071cb144c7a 160 * Checkup routine
JMF 12:0071cb144c7a 161 */
JMF 12:0071cb144c7a 162 int mbedtls_arc4_self_test( int verbose )
JMF 12:0071cb144c7a 163 {
JMF 12:0071cb144c7a 164 int i, ret = 0;
JMF 12:0071cb144c7a 165 unsigned char ibuf[8];
JMF 12:0071cb144c7a 166 unsigned char obuf[8];
JMF 12:0071cb144c7a 167 mbedtls_arc4_context ctx;
JMF 12:0071cb144c7a 168
JMF 12:0071cb144c7a 169 mbedtls_arc4_init( &ctx );
JMF 12:0071cb144c7a 170
JMF 12:0071cb144c7a 171 for( i = 0; i < 3; i++ )
JMF 12:0071cb144c7a 172 {
JMF 12:0071cb144c7a 173 if( verbose != 0 )
JMF 12:0071cb144c7a 174 mbedtls_printf( " ARC4 test #%d: ", i + 1 );
JMF 12:0071cb144c7a 175
JMF 12:0071cb144c7a 176 memcpy( ibuf, arc4_test_pt[i], 8 );
JMF 12:0071cb144c7a 177
JMF 12:0071cb144c7a 178 mbedtls_arc4_setup( &ctx, arc4_test_key[i], 8 );
JMF 12:0071cb144c7a 179 mbedtls_arc4_crypt( &ctx, 8, ibuf, obuf );
JMF 12:0071cb144c7a 180
JMF 12:0071cb144c7a 181 if( memcmp( obuf, arc4_test_ct[i], 8 ) != 0 )
JMF 12:0071cb144c7a 182 {
JMF 12:0071cb144c7a 183 if( verbose != 0 )
JMF 12:0071cb144c7a 184 mbedtls_printf( "failed\n" );
JMF 12:0071cb144c7a 185
JMF 12:0071cb144c7a 186 ret = 1;
JMF 12:0071cb144c7a 187 goto exit;
JMF 12:0071cb144c7a 188 }
JMF 12:0071cb144c7a 189
JMF 12:0071cb144c7a 190 if( verbose != 0 )
JMF 12:0071cb144c7a 191 mbedtls_printf( "passed\n" );
JMF 12:0071cb144c7a 192 }
JMF 12:0071cb144c7a 193
JMF 12:0071cb144c7a 194 if( verbose != 0 )
JMF 12:0071cb144c7a 195 mbedtls_printf( "\n" );
JMF 12:0071cb144c7a 196
JMF 12:0071cb144c7a 197 exit:
JMF 12:0071cb144c7a 198 mbedtls_arc4_free( &ctx );
JMF 12:0071cb144c7a 199
JMF 12:0071cb144c7a 200 return( ret );
JMF 12:0071cb144c7a 201 }
JMF 12:0071cb144c7a 202
JMF 12:0071cb144c7a 203 #endif /* MBEDTLS_SELF_TEST */
JMF 12:0071cb144c7a 204
JMF 12:0071cb144c7a 205 #endif /* MBEDTLS_ARC4_C */