erkin yucel / mbed-os

mbed os with nrf51 internal bandgap enabled to read battery level

Dependents:   BLE_file_test BLE_Blink ExternalEncoder

features/mbedtls/src/md2.c@0:f269e3021894, 2016-10-23 (annotated)

Committer:
elessair
Date:
Sun Oct 23 15:10:02 2016 +0000
Revision:
0:f269e3021894
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elessair 0:f269e3021894 1 /*
elessair 0:f269e3021894 2 * RFC 1115/1319 compliant MD2 implementation
elessair 0:f269e3021894 3 *
elessair 0:f269e3021894 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
elessair 0:f269e3021894 5 * SPDX-License-Identifier: Apache-2.0
elessair 0:f269e3021894 6 *
elessair 0:f269e3021894 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
elessair 0:f269e3021894 8 * not use this file except in compliance with the License.
elessair 0:f269e3021894 9 * You may obtain a copy of the License at
elessair 0:f269e3021894 10 *
elessair 0:f269e3021894 11 * http://www.apache.org/licenses/LICENSE-2.0
elessair 0:f269e3021894 12 *
elessair 0:f269e3021894 13 * Unless required by applicable law or agreed to in writing, software
elessair 0:f269e3021894 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
elessair 0:f269e3021894 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
elessair 0:f269e3021894 16 * See the License for the specific language governing permissions and
elessair 0:f269e3021894 17 * limitations under the License.
elessair 0:f269e3021894 18 *
elessair 0:f269e3021894 19 * This file is part of mbed TLS (https://tls.mbed.org)
elessair 0:f269e3021894 20 */
elessair 0:f269e3021894 21 /*
elessair 0:f269e3021894 22 * The MD2 algorithm was designed by Ron Rivest in 1989.
elessair 0:f269e3021894 23 *
elessair 0:f269e3021894 24 * http://www.ietf.org/rfc/rfc1115.txt
elessair 0:f269e3021894 25 * http://www.ietf.org/rfc/rfc1319.txt
elessair 0:f269e3021894 26 */
elessair 0:f269e3021894 27
elessair 0:f269e3021894 28 #if !defined(MBEDTLS_CONFIG_FILE)
elessair 0:f269e3021894 29 #include "mbedtls/config.h"
elessair 0:f269e3021894 30 #else
elessair 0:f269e3021894 31 #include MBEDTLS_CONFIG_FILE
elessair 0:f269e3021894 32 #endif
elessair 0:f269e3021894 33
elessair 0:f269e3021894 34 #if defined(MBEDTLS_MD2_C)
elessair 0:f269e3021894 35
elessair 0:f269e3021894 36 #include "mbedtls/md2.h"
elessair 0:f269e3021894 37
elessair 0:f269e3021894 38 #include <string.h>
elessair 0:f269e3021894 39
elessair 0:f269e3021894 40 #if defined(MBEDTLS_SELF_TEST)
elessair 0:f269e3021894 41 #if defined(MBEDTLS_PLATFORM_C)
elessair 0:f269e3021894 42 #include "mbedtls/platform.h"
elessair 0:f269e3021894 43 #else
elessair 0:f269e3021894 44 #include <stdio.h>
elessair 0:f269e3021894 45 #define mbedtls_printf printf
elessair 0:f269e3021894 46 #endif /* MBEDTLS_PLATFORM_C */
elessair 0:f269e3021894 47 #endif /* MBEDTLS_SELF_TEST */
elessair 0:f269e3021894 48
elessair 0:f269e3021894 49 #if !defined(MBEDTLS_MD2_ALT)
elessair 0:f269e3021894 50
elessair 0:f269e3021894 51 /* Implementation that should never be optimized out by the compiler */
elessair 0:f269e3021894 52 static void mbedtls_zeroize( void *v, size_t n ) {
elessair 0:f269e3021894 53 volatile unsigned char *p = v; while( n-- ) *p++ = 0;
elessair 0:f269e3021894 54 }
elessair 0:f269e3021894 55
elessair 0:f269e3021894 56 static const unsigned char PI_SUBST[256] =
elessair 0:f269e3021894 57 {
elessair 0:f269e3021894 58 0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01, 0x3D, 0x36,
elessair 0:f269e3021894 59 0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13, 0x62, 0xA7, 0x05, 0xF3,
elessair 0:f269e3021894 60 0xC0, 0xC7, 0x73, 0x8C, 0x98, 0x93, 0x2B, 0xD9, 0xBC, 0x4C,
elessair 0:f269e3021894 61 0x82, 0xCA, 0x1E, 0x9B, 0x57, 0x3C, 0xFD, 0xD4, 0xE0, 0x16,
elessair 0:f269e3021894 62 0x67, 0x42, 0x6F, 0x18, 0x8A, 0x17, 0xE5, 0x12, 0xBE, 0x4E,
elessair 0:f269e3021894 63 0xC4, 0xD6, 0xDA, 0x9E, 0xDE, 0x49, 0xA0, 0xFB, 0xF5, 0x8E,
elessair 0:f269e3021894 64 0xBB, 0x2F, 0xEE, 0x7A, 0xA9, 0x68, 0x79, 0x91, 0x15, 0xB2,
elessair 0:f269e3021894 65 0x07, 0x3F, 0x94, 0xC2, 0x10, 0x89, 0x0B, 0x22, 0x5F, 0x21,
elessair 0:f269e3021894 66 0x80, 0x7F, 0x5D, 0x9A, 0x5A, 0x90, 0x32, 0x27, 0x35, 0x3E,
elessair 0:f269e3021894 67 0xCC, 0xE7, 0xBF, 0xF7, 0x97, 0x03, 0xFF, 0x19, 0x30, 0xB3,
elessair 0:f269e3021894 68 0x48, 0xA5, 0xB5, 0xD1, 0xD7, 0x5E, 0x92, 0x2A, 0xAC, 0x56,
elessair 0:f269e3021894 69 0xAA, 0xC6, 0x4F, 0xB8, 0x38, 0xD2, 0x96, 0xA4, 0x7D, 0xB6,
elessair 0:f269e3021894 70 0x76, 0xFC, 0x6B, 0xE2, 0x9C, 0x74, 0x04, 0xF1, 0x45, 0x9D,
elessair 0:f269e3021894 71 0x70, 0x59, 0x64, 0x71, 0x87, 0x20, 0x86, 0x5B, 0xCF, 0x65,
elessair 0:f269e3021894 72 0xE6, 0x2D, 0xA8, 0x02, 0x1B, 0x60, 0x25, 0xAD, 0xAE, 0xB0,
elessair 0:f269e3021894 73 0xB9, 0xF6, 0x1C, 0x46, 0x61, 0x69, 0x34, 0x40, 0x7E, 0x0F,
elessair 0:f269e3021894 74 0x55, 0x47, 0xA3, 0x23, 0xDD, 0x51, 0xAF, 0x3A, 0xC3, 0x5C,
elessair 0:f269e3021894 75 0xF9, 0xCE, 0xBA, 0xC5, 0xEA, 0x26, 0x2C, 0x53, 0x0D, 0x6E,
elessair 0:f269e3021894 76 0x85, 0x28, 0x84, 0x09, 0xD3, 0xDF, 0xCD, 0xF4, 0x41, 0x81,
elessair 0:f269e3021894 77 0x4D, 0x52, 0x6A, 0xDC, 0x37, 0xC8, 0x6C, 0xC1, 0xAB, 0xFA,
elessair 0:f269e3021894 78 0x24, 0xE1, 0x7B, 0x08, 0x0C, 0xBD, 0xB1, 0x4A, 0x78, 0x88,
elessair 0:f269e3021894 79 0x95, 0x8B, 0xE3, 0x63, 0xE8, 0x6D, 0xE9, 0xCB, 0xD5, 0xFE,
elessair 0:f269e3021894 80 0x3B, 0x00, 0x1D, 0x39, 0xF2, 0xEF, 0xB7, 0x0E, 0x66, 0x58,
elessair 0:f269e3021894 81 0xD0, 0xE4, 0xA6, 0x77, 0x72, 0xF8, 0xEB, 0x75, 0x4B, 0x0A,
elessair 0:f269e3021894 82 0x31, 0x44, 0x50, 0xB4, 0x8F, 0xED, 0x1F, 0x1A, 0xDB, 0x99,
elessair 0:f269e3021894 83 0x8D, 0x33, 0x9F, 0x11, 0x83, 0x14
elessair 0:f269e3021894 84 };
elessair 0:f269e3021894 85
elessair 0:f269e3021894 86 void mbedtls_md2_init( mbedtls_md2_context *ctx )
elessair 0:f269e3021894 87 {
elessair 0:f269e3021894 88 memset( ctx, 0, sizeof( mbedtls_md2_context ) );
elessair 0:f269e3021894 89 }
elessair 0:f269e3021894 90
elessair 0:f269e3021894 91 void mbedtls_md2_free( mbedtls_md2_context *ctx )
elessair 0:f269e3021894 92 {
elessair 0:f269e3021894 93 if( ctx == NULL )
elessair 0:f269e3021894 94 return;
elessair 0:f269e3021894 95
elessair 0:f269e3021894 96 mbedtls_zeroize( ctx, sizeof( mbedtls_md2_context ) );
elessair 0:f269e3021894 97 }
elessair 0:f269e3021894 98
elessair 0:f269e3021894 99 void mbedtls_md2_clone( mbedtls_md2_context *dst,
elessair 0:f269e3021894 100 const mbedtls_md2_context *src )
elessair 0:f269e3021894 101 {
elessair 0:f269e3021894 102 *dst = *src;
elessair 0:f269e3021894 103 }
elessair 0:f269e3021894 104
elessair 0:f269e3021894 105 /*
elessair 0:f269e3021894 106 * MD2 context setup
elessair 0:f269e3021894 107 */
elessair 0:f269e3021894 108 void mbedtls_md2_starts( mbedtls_md2_context *ctx )
elessair 0:f269e3021894 109 {
elessair 0:f269e3021894 110 memset( ctx->cksum, 0, 16 );
elessair 0:f269e3021894 111 memset( ctx->state, 0, 46 );
elessair 0:f269e3021894 112 memset( ctx->buffer, 0, 16 );
elessair 0:f269e3021894 113 ctx->left = 0;
elessair 0:f269e3021894 114 }
elessair 0:f269e3021894 115
elessair 0:f269e3021894 116 #if !defined(MBEDTLS_MD2_PROCESS_ALT)
elessair 0:f269e3021894 117 void mbedtls_md2_process( mbedtls_md2_context *ctx )
elessair 0:f269e3021894 118 {
elessair 0:f269e3021894 119 int i, j;
elessair 0:f269e3021894 120 unsigned char t = 0;
elessair 0:f269e3021894 121
elessair 0:f269e3021894 122 for( i = 0; i < 16; i++ )
elessair 0:f269e3021894 123 {
elessair 0:f269e3021894 124 ctx->state[i + 16] = ctx->buffer[i];
elessair 0:f269e3021894 125 ctx->state[i + 32] =
elessair 0:f269e3021894 126 (unsigned char)( ctx->buffer[i] ^ ctx->state[i]);
elessair 0:f269e3021894 127 }
elessair 0:f269e3021894 128
elessair 0:f269e3021894 129 for( i = 0; i < 18; i++ )
elessair 0:f269e3021894 130 {
elessair 0:f269e3021894 131 for( j = 0; j < 48; j++ )
elessair 0:f269e3021894 132 {
elessair 0:f269e3021894 133 ctx->state[j] = (unsigned char)
elessair 0:f269e3021894 134 ( ctx->state[j] ^ PI_SUBST[t] );
elessair 0:f269e3021894 135 t = ctx->state[j];
elessair 0:f269e3021894 136 }
elessair 0:f269e3021894 137
elessair 0:f269e3021894 138 t = (unsigned char)( t + i );
elessair 0:f269e3021894 139 }
elessair 0:f269e3021894 140
elessair 0:f269e3021894 141 t = ctx->cksum[15];
elessair 0:f269e3021894 142
elessair 0:f269e3021894 143 for( i = 0; i < 16; i++ )
elessair 0:f269e3021894 144 {
elessair 0:f269e3021894 145 ctx->cksum[i] = (unsigned char)
elessair 0:f269e3021894 146 ( ctx->cksum[i] ^ PI_SUBST[ctx->buffer[i] ^ t] );
elessair 0:f269e3021894 147 t = ctx->cksum[i];
elessair 0:f269e3021894 148 }
elessair 0:f269e3021894 149 }
elessair 0:f269e3021894 150 #endif /* !MBEDTLS_MD2_PROCESS_ALT */
elessair 0:f269e3021894 151
elessair 0:f269e3021894 152 /*
elessair 0:f269e3021894 153 * MD2 process buffer
elessair 0:f269e3021894 154 */
elessair 0:f269e3021894 155 void mbedtls_md2_update( mbedtls_md2_context *ctx, const unsigned char *input, size_t ilen )
elessair 0:f269e3021894 156 {
elessair 0:f269e3021894 157 size_t fill;
elessair 0:f269e3021894 158
elessair 0:f269e3021894 159 while( ilen > 0 )
elessair 0:f269e3021894 160 {
elessair 0:f269e3021894 161 if( ctx->left + ilen > 16 )
elessair 0:f269e3021894 162 fill = 16 - ctx->left;
elessair 0:f269e3021894 163 else
elessair 0:f269e3021894 164 fill = ilen;
elessair 0:f269e3021894 165
elessair 0:f269e3021894 166 memcpy( ctx->buffer + ctx->left, input, fill );
elessair 0:f269e3021894 167
elessair 0:f269e3021894 168 ctx->left += fill;
elessair 0:f269e3021894 169 input += fill;
elessair 0:f269e3021894 170 ilen -= fill;
elessair 0:f269e3021894 171
elessair 0:f269e3021894 172 if( ctx->left == 16 )
elessair 0:f269e3021894 173 {
elessair 0:f269e3021894 174 ctx->left = 0;
elessair 0:f269e3021894 175 mbedtls_md2_process( ctx );
elessair 0:f269e3021894 176 }
elessair 0:f269e3021894 177 }
elessair 0:f269e3021894 178 }
elessair 0:f269e3021894 179
elessair 0:f269e3021894 180 /*
elessair 0:f269e3021894 181 * MD2 final digest
elessair 0:f269e3021894 182 */
elessair 0:f269e3021894 183 void mbedtls_md2_finish( mbedtls_md2_context *ctx, unsigned char output[16] )
elessair 0:f269e3021894 184 {
elessair 0:f269e3021894 185 size_t i;
elessair 0:f269e3021894 186 unsigned char x;
elessair 0:f269e3021894 187
elessair 0:f269e3021894 188 x = (unsigned char)( 16 - ctx->left );
elessair 0:f269e3021894 189
elessair 0:f269e3021894 190 for( i = ctx->left; i < 16; i++ )
elessair 0:f269e3021894 191 ctx->buffer[i] = x;
elessair 0:f269e3021894 192
elessair 0:f269e3021894 193 mbedtls_md2_process( ctx );
elessair 0:f269e3021894 194
elessair 0:f269e3021894 195 memcpy( ctx->buffer, ctx->cksum, 16 );
elessair 0:f269e3021894 196 mbedtls_md2_process( ctx );
elessair 0:f269e3021894 197
elessair 0:f269e3021894 198 memcpy( output, ctx->state, 16 );
elessair 0:f269e3021894 199 }
elessair 0:f269e3021894 200
elessair 0:f269e3021894 201 #endif /* !MBEDTLS_MD2_ALT */
elessair 0:f269e3021894 202
elessair 0:f269e3021894 203 /*
elessair 0:f269e3021894 204 * output = MD2( input buffer )
elessair 0:f269e3021894 205 */
elessair 0:f269e3021894 206 void mbedtls_md2( const unsigned char *input, size_t ilen, unsigned char output[16] )
elessair 0:f269e3021894 207 {
elessair 0:f269e3021894 208 mbedtls_md2_context ctx;
elessair 0:f269e3021894 209
elessair 0:f269e3021894 210 mbedtls_md2_init( &ctx );
elessair 0:f269e3021894 211 mbedtls_md2_starts( &ctx );
elessair 0:f269e3021894 212 mbedtls_md2_update( &ctx, input, ilen );
elessair 0:f269e3021894 213 mbedtls_md2_finish( &ctx, output );
elessair 0:f269e3021894 214 mbedtls_md2_free( &ctx );
elessair 0:f269e3021894 215 }
elessair 0:f269e3021894 216
elessair 0:f269e3021894 217 #if defined(MBEDTLS_SELF_TEST)
elessair 0:f269e3021894 218
elessair 0:f269e3021894 219 /*
elessair 0:f269e3021894 220 * RFC 1319 test vectors
elessair 0:f269e3021894 221 */
elessair 0:f269e3021894 222 static const char md2_test_str[7][81] =
elessair 0:f269e3021894 223 {
elessair 0:f269e3021894 224 { "" },
elessair 0:f269e3021894 225 { "a" },
elessair 0:f269e3021894 226 { "abc" },
elessair 0:f269e3021894 227 { "message digest" },
elessair 0:f269e3021894 228 { "abcdefghijklmnopqrstuvwxyz" },
elessair 0:f269e3021894 229 { "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789" },
elessair 0:f269e3021894 230 { "12345678901234567890123456789012345678901234567890123456789012" \
elessair 0:f269e3021894 231 "345678901234567890" }
elessair 0:f269e3021894 232 };
elessair 0:f269e3021894 233
elessair 0:f269e3021894 234 static const unsigned char md2_test_sum[7][16] =
elessair 0:f269e3021894 235 {
elessair 0:f269e3021894 236 { 0x83, 0x50, 0xE5, 0xA3, 0xE2, 0x4C, 0x15, 0x3D,
elessair 0:f269e3021894 237 0xF2, 0x27, 0x5C, 0x9F, 0x80, 0x69, 0x27, 0x73 },
elessair 0:f269e3021894 238 { 0x32, 0xEC, 0x01, 0xEC, 0x4A, 0x6D, 0xAC, 0x72,
elessair 0:f269e3021894 239 0xC0, 0xAB, 0x96, 0xFB, 0x34, 0xC0, 0xB5, 0xD1 },
elessair 0:f269e3021894 240 { 0xDA, 0x85, 0x3B, 0x0D, 0x3F, 0x88, 0xD9, 0x9B,
elessair 0:f269e3021894 241 0x30, 0x28, 0x3A, 0x69, 0xE6, 0xDE, 0xD6, 0xBB },
elessair 0:f269e3021894 242 { 0xAB, 0x4F, 0x49, 0x6B, 0xFB, 0x2A, 0x53, 0x0B,
elessair 0:f269e3021894 243 0x21, 0x9F, 0xF3, 0x30, 0x31, 0xFE, 0x06, 0xB0 },
elessair 0:f269e3021894 244 { 0x4E, 0x8D, 0xDF, 0xF3, 0x65, 0x02, 0x92, 0xAB,
elessair 0:f269e3021894 245 0x5A, 0x41, 0x08, 0xC3, 0xAA, 0x47, 0x94, 0x0B },
elessair 0:f269e3021894 246 { 0xDA, 0x33, 0xDE, 0xF2, 0xA4, 0x2D, 0xF1, 0x39,
elessair 0:f269e3021894 247 0x75, 0x35, 0x28, 0x46, 0xC3, 0x03, 0x38, 0xCD },
elessair 0:f269e3021894 248 { 0xD5, 0x97, 0x6F, 0x79, 0xD8, 0x3D, 0x3A, 0x0D,
elessair 0:f269e3021894 249 0xC9, 0x80, 0x6C, 0x3C, 0x66, 0xF3, 0xEF, 0xD8 }
elessair 0:f269e3021894 250 };
elessair 0:f269e3021894 251
elessair 0:f269e3021894 252 /*
elessair 0:f269e3021894 253 * Checkup routine
elessair 0:f269e3021894 254 */
elessair 0:f269e3021894 255 int mbedtls_md2_self_test( int verbose )
elessair 0:f269e3021894 256 {
elessair 0:f269e3021894 257 int i;
elessair 0:f269e3021894 258 unsigned char md2sum[16];
elessair 0:f269e3021894 259
elessair 0:f269e3021894 260 for( i = 0; i < 7; i++ )
elessair 0:f269e3021894 261 {
elessair 0:f269e3021894 262 if( verbose != 0 )
elessair 0:f269e3021894 263 mbedtls_printf( " MD2 test #%d: ", i + 1 );
elessair 0:f269e3021894 264
elessair 0:f269e3021894 265 mbedtls_md2( (unsigned char *) md2_test_str[i],
elessair 0:f269e3021894 266 strlen( md2_test_str[i] ), md2sum );
elessair 0:f269e3021894 267
elessair 0:f269e3021894 268 if( memcmp( md2sum, md2_test_sum[i], 16 ) != 0 )
elessair 0:f269e3021894 269 {
elessair 0:f269e3021894 270 if( verbose != 0 )
elessair 0:f269e3021894 271 mbedtls_printf( "failed\n" );
elessair 0:f269e3021894 272
elessair 0:f269e3021894 273 return( 1 );
elessair 0:f269e3021894 274 }
elessair 0:f269e3021894 275
elessair 0:f269e3021894 276 if( verbose != 0 )
elessair 0:f269e3021894 277 mbedtls_printf( "passed\n" );
elessair 0:f269e3021894 278 }
elessair 0:f269e3021894 279
elessair 0:f269e3021894 280 if( verbose != 0 )
elessair 0:f269e3021894 281 mbedtls_printf( "\n" );
elessair 0:f269e3021894 282
elessair 0:f269e3021894 283 return( 0 );
elessair 0:f269e3021894 284 }
elessair 0:f269e3021894 285
elessair 0:f269e3021894 286 #endif /* MBEDTLS_SELF_TEST */
elessair 0:f269e3021894 287
elessair 0:f269e3021894 288 #endif /* MBEDTLS_MD2_C */