Greg Steiert / pegasus_dev

Dependents:   blinky_max32630fthr

features/mbedtls/src/base64.c@3:1198227e6421, 2016-12-16 (annotated)

Committer:
switches
Date:
Fri Dec 16 16:27:57 2016 +0000
Revision:
3:1198227e6421
Parent:
0:5c4d7b2438d3 
Changed ADC scale for MAX32625 platforms to 1.2V full scale to match MAX32630 platforms

Who changed what in which revision?

UserRevisionLine numberNew contents of line
switches 0:5c4d7b2438d3 1 /*
switches 0:5c4d7b2438d3 2 * RFC 1521 base64 encoding/decoding
switches 0:5c4d7b2438d3 3 *
switches 0:5c4d7b2438d3 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
switches 0:5c4d7b2438d3 5 * SPDX-License-Identifier: Apache-2.0
switches 0:5c4d7b2438d3 6 *
switches 0:5c4d7b2438d3 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
switches 0:5c4d7b2438d3 8 * not use this file except in compliance with the License.
switches 0:5c4d7b2438d3 9 * You may obtain a copy of the License at
switches 0:5c4d7b2438d3 10 *
switches 0:5c4d7b2438d3 11 * http://www.apache.org/licenses/LICENSE-2.0
switches 0:5c4d7b2438d3 12 *
switches 0:5c4d7b2438d3 13 * Unless required by applicable law or agreed to in writing, software
switches 0:5c4d7b2438d3 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
switches 0:5c4d7b2438d3 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
switches 0:5c4d7b2438d3 16 * See the License for the specific language governing permissions and
switches 0:5c4d7b2438d3 17 * limitations under the License.
switches 0:5c4d7b2438d3 18 *
switches 0:5c4d7b2438d3 19 * This file is part of mbed TLS (https://tls.mbed.org)
switches 0:5c4d7b2438d3 20 */
switches 0:5c4d7b2438d3 21
switches 0:5c4d7b2438d3 22 #if !defined(MBEDTLS_CONFIG_FILE)
switches 0:5c4d7b2438d3 23 #include "mbedtls/config.h"
switches 0:5c4d7b2438d3 24 #else
switches 0:5c4d7b2438d3 25 #include MBEDTLS_CONFIG_FILE
switches 0:5c4d7b2438d3 26 #endif
switches 0:5c4d7b2438d3 27
switches 0:5c4d7b2438d3 28 #if defined(MBEDTLS_BASE64_C)
switches 0:5c4d7b2438d3 29
switches 0:5c4d7b2438d3 30 #include "mbedtls/base64.h"
switches 0:5c4d7b2438d3 31
switches 0:5c4d7b2438d3 32 #include <stdint.h>
switches 0:5c4d7b2438d3 33
switches 0:5c4d7b2438d3 34 #if defined(MBEDTLS_SELF_TEST)
switches 0:5c4d7b2438d3 35 #include <string.h>
switches 0:5c4d7b2438d3 36 #if defined(MBEDTLS_PLATFORM_C)
switches 0:5c4d7b2438d3 37 #include "mbedtls/platform.h"
switches 0:5c4d7b2438d3 38 #else
switches 0:5c4d7b2438d3 39 #include <stdio.h>
switches 0:5c4d7b2438d3 40 #define mbedtls_printf printf
switches 0:5c4d7b2438d3 41 #endif /* MBEDTLS_PLATFORM_C */
switches 0:5c4d7b2438d3 42 #endif /* MBEDTLS_SELF_TEST */
switches 0:5c4d7b2438d3 43
switches 0:5c4d7b2438d3 44 static const unsigned char base64_enc_map[64] =
switches 0:5c4d7b2438d3 45 {
switches 0:5c4d7b2438d3 46 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J',
switches 0:5c4d7b2438d3 47 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
switches 0:5c4d7b2438d3 48 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd',
switches 0:5c4d7b2438d3 49 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
switches 0:5c4d7b2438d3 50 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x',
switches 0:5c4d7b2438d3 51 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7',
switches 0:5c4d7b2438d3 52 '8', '9', '+', '/'
switches 0:5c4d7b2438d3 53 };
switches 0:5c4d7b2438d3 54
switches 0:5c4d7b2438d3 55 static const unsigned char base64_dec_map[128] =
switches 0:5c4d7b2438d3 56 {
switches 0:5c4d7b2438d3 57 127, 127, 127, 127, 127, 127, 127, 127, 127, 127,
switches 0:5c4d7b2438d3 58 127, 127, 127, 127, 127, 127, 127, 127, 127, 127,
switches 0:5c4d7b2438d3 59 127, 127, 127, 127, 127, 127, 127, 127, 127, 127,
switches 0:5c4d7b2438d3 60 127, 127, 127, 127, 127, 127, 127, 127, 127, 127,
switches 0:5c4d7b2438d3 61 127, 127, 127, 62, 127, 127, 127, 63, 52, 53,
switches 0:5c4d7b2438d3 62 54, 55, 56, 57, 58, 59, 60, 61, 127, 127,
switches 0:5c4d7b2438d3 63 127, 64, 127, 127, 127, 0, 1, 2, 3, 4,
switches 0:5c4d7b2438d3 64 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
switches 0:5c4d7b2438d3 65 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
switches 0:5c4d7b2438d3 66 25, 127, 127, 127, 127, 127, 127, 26, 27, 28,
switches 0:5c4d7b2438d3 67 29, 30, 31, 32, 33, 34, 35, 36, 37, 38,
switches 0:5c4d7b2438d3 68 39, 40, 41, 42, 43, 44, 45, 46, 47, 48,
switches 0:5c4d7b2438d3 69 49, 50, 51, 127, 127, 127, 127, 127
switches 0:5c4d7b2438d3 70 };
switches 0:5c4d7b2438d3 71
switches 0:5c4d7b2438d3 72 #define BASE64_SIZE_T_MAX ( (size_t) -1 ) /* SIZE_T_MAX is not standard */
switches 0:5c4d7b2438d3 73
switches 0:5c4d7b2438d3 74 /*
switches 0:5c4d7b2438d3 75 * Encode a buffer into base64 format
switches 0:5c4d7b2438d3 76 */
switches 0:5c4d7b2438d3 77 int mbedtls_base64_encode( unsigned char *dst, size_t dlen, size_t *olen,
switches 0:5c4d7b2438d3 78 const unsigned char *src, size_t slen )
switches 0:5c4d7b2438d3 79 {
switches 0:5c4d7b2438d3 80 size_t i, n;
switches 0:5c4d7b2438d3 81 int C1, C2, C3;
switches 0:5c4d7b2438d3 82 unsigned char *p;
switches 0:5c4d7b2438d3 83
switches 0:5c4d7b2438d3 84 if( slen == 0 )
switches 0:5c4d7b2438d3 85 {
switches 0:5c4d7b2438d3 86 *olen = 0;
switches 0:5c4d7b2438d3 87 return( 0 );
switches 0:5c4d7b2438d3 88 }
switches 0:5c4d7b2438d3 89
switches 0:5c4d7b2438d3 90 n = slen / 3 + ( slen % 3 != 0 );
switches 0:5c4d7b2438d3 91
switches 0:5c4d7b2438d3 92 if( n > ( BASE64_SIZE_T_MAX - 1 ) / 4 )
switches 0:5c4d7b2438d3 93 {
switches 0:5c4d7b2438d3 94 *olen = BASE64_SIZE_T_MAX;
switches 0:5c4d7b2438d3 95 return( MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL );
switches 0:5c4d7b2438d3 96 }
switches 0:5c4d7b2438d3 97
switches 0:5c4d7b2438d3 98 n *= 4;
switches 0:5c4d7b2438d3 99
switches 0:5c4d7b2438d3 100 if( ( dlen < n + 1 ) || ( NULL == dst ) )
switches 0:5c4d7b2438d3 101 {
switches 0:5c4d7b2438d3 102 *olen = n + 1;
switches 0:5c4d7b2438d3 103 return( MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL );
switches 0:5c4d7b2438d3 104 }
switches 0:5c4d7b2438d3 105
switches 0:5c4d7b2438d3 106 n = ( slen / 3 ) * 3;
switches 0:5c4d7b2438d3 107
switches 0:5c4d7b2438d3 108 for( i = 0, p = dst; i < n; i += 3 )
switches 0:5c4d7b2438d3 109 {
switches 0:5c4d7b2438d3 110 C1 = *src++;
switches 0:5c4d7b2438d3 111 C2 = *src++;
switches 0:5c4d7b2438d3 112 C3 = *src++;
switches 0:5c4d7b2438d3 113
switches 0:5c4d7b2438d3 114 *p++ = base64_enc_map[(C1 >> 2) & 0x3F];
switches 0:5c4d7b2438d3 115 *p++ = base64_enc_map[(((C1 & 3) << 4) + (C2 >> 4)) & 0x3F];
switches 0:5c4d7b2438d3 116 *p++ = base64_enc_map[(((C2 & 15) << 2) + (C3 >> 6)) & 0x3F];
switches 0:5c4d7b2438d3 117 *p++ = base64_enc_map[C3 & 0x3F];
switches 0:5c4d7b2438d3 118 }
switches 0:5c4d7b2438d3 119
switches 0:5c4d7b2438d3 120 if( i < slen )
switches 0:5c4d7b2438d3 121 {
switches 0:5c4d7b2438d3 122 C1 = *src++;
switches 0:5c4d7b2438d3 123 C2 = ( ( i + 1 ) < slen ) ? *src++ : 0;
switches 0:5c4d7b2438d3 124
switches 0:5c4d7b2438d3 125 *p++ = base64_enc_map[(C1 >> 2) & 0x3F];
switches 0:5c4d7b2438d3 126 *p++ = base64_enc_map[(((C1 & 3) << 4) + (C2 >> 4)) & 0x3F];
switches 0:5c4d7b2438d3 127
switches 0:5c4d7b2438d3 128 if( ( i + 1 ) < slen )
switches 0:5c4d7b2438d3 129 *p++ = base64_enc_map[((C2 & 15) << 2) & 0x3F];
switches 0:5c4d7b2438d3 130 else *p++ = '=';
switches 0:5c4d7b2438d3 131
switches 0:5c4d7b2438d3 132 *p++ = '=';
switches 0:5c4d7b2438d3 133 }
switches 0:5c4d7b2438d3 134
switches 0:5c4d7b2438d3 135 *olen = p - dst;
switches 0:5c4d7b2438d3 136 *p = 0;
switches 0:5c4d7b2438d3 137
switches 0:5c4d7b2438d3 138 return( 0 );
switches 0:5c4d7b2438d3 139 }
switches 0:5c4d7b2438d3 140
switches 0:5c4d7b2438d3 141 /*
switches 0:5c4d7b2438d3 142 * Decode a base64-formatted buffer
switches 0:5c4d7b2438d3 143 */
switches 0:5c4d7b2438d3 144 int mbedtls_base64_decode( unsigned char *dst, size_t dlen, size_t *olen,
switches 0:5c4d7b2438d3 145 const unsigned char *src, size_t slen )
switches 0:5c4d7b2438d3 146 {
switches 0:5c4d7b2438d3 147 size_t i, n;
switches 0:5c4d7b2438d3 148 uint32_t j, x;
switches 0:5c4d7b2438d3 149 unsigned char *p;
switches 0:5c4d7b2438d3 150
switches 0:5c4d7b2438d3 151 /* First pass: check for validity and get output length */
switches 0:5c4d7b2438d3 152 for( i = n = j = 0; i < slen; i++ )
switches 0:5c4d7b2438d3 153 {
switches 0:5c4d7b2438d3 154 /* Skip spaces before checking for EOL */
switches 0:5c4d7b2438d3 155 x = 0;
switches 0:5c4d7b2438d3 156 while( i < slen && src[i] == ' ' )
switches 0:5c4d7b2438d3 157 {
switches 0:5c4d7b2438d3 158 ++i;
switches 0:5c4d7b2438d3 159 ++x;
switches 0:5c4d7b2438d3 160 }
switches 0:5c4d7b2438d3 161
switches 0:5c4d7b2438d3 162 /* Spaces at end of buffer are OK */
switches 0:5c4d7b2438d3 163 if( i == slen )
switches 0:5c4d7b2438d3 164 break;
switches 0:5c4d7b2438d3 165
switches 0:5c4d7b2438d3 166 if( ( slen - i ) >= 2 &&
switches 0:5c4d7b2438d3 167 src[i] == '\r' && src[i + 1] == '\n' )
switches 0:5c4d7b2438d3 168 continue;
switches 0:5c4d7b2438d3 169
switches 0:5c4d7b2438d3 170 if( src[i] == '\n' )
switches 0:5c4d7b2438d3 171 continue;
switches 0:5c4d7b2438d3 172
switches 0:5c4d7b2438d3 173 /* Space inside a line is an error */
switches 0:5c4d7b2438d3 174 if( x != 0 )
switches 0:5c4d7b2438d3 175 return( MBEDTLS_ERR_BASE64_INVALID_CHARACTER );
switches 0:5c4d7b2438d3 176
switches 0:5c4d7b2438d3 177 if( src[i] == '=' && ++j > 2 )
switches 0:5c4d7b2438d3 178 return( MBEDTLS_ERR_BASE64_INVALID_CHARACTER );
switches 0:5c4d7b2438d3 179
switches 0:5c4d7b2438d3 180 if( src[i] > 127 || base64_dec_map[src[i]] == 127 )
switches 0:5c4d7b2438d3 181 return( MBEDTLS_ERR_BASE64_INVALID_CHARACTER );
switches 0:5c4d7b2438d3 182
switches 0:5c4d7b2438d3 183 if( base64_dec_map[src[i]] < 64 && j != 0 )
switches 0:5c4d7b2438d3 184 return( MBEDTLS_ERR_BASE64_INVALID_CHARACTER );
switches 0:5c4d7b2438d3 185
switches 0:5c4d7b2438d3 186 n++;
switches 0:5c4d7b2438d3 187 }
switches 0:5c4d7b2438d3 188
switches 0:5c4d7b2438d3 189 if( n == 0 )
switches 0:5c4d7b2438d3 190 {
switches 0:5c4d7b2438d3 191 *olen = 0;
switches 0:5c4d7b2438d3 192 return( 0 );
switches 0:5c4d7b2438d3 193 }
switches 0:5c4d7b2438d3 194
switches 0:5c4d7b2438d3 195 n = ( ( n * 6 ) + 7 ) >> 3;
switches 0:5c4d7b2438d3 196 n -= j;
switches 0:5c4d7b2438d3 197
switches 0:5c4d7b2438d3 198 if( dst == NULL || dlen < n )
switches 0:5c4d7b2438d3 199 {
switches 0:5c4d7b2438d3 200 *olen = n;
switches 0:5c4d7b2438d3 201 return( MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL );
switches 0:5c4d7b2438d3 202 }
switches 0:5c4d7b2438d3 203
switches 0:5c4d7b2438d3 204 for( j = 3, n = x = 0, p = dst; i > 0; i--, src++ )
switches 0:5c4d7b2438d3 205 {
switches 0:5c4d7b2438d3 206 if( *src == '\r' || *src == '\n' || *src == ' ' )
switches 0:5c4d7b2438d3 207 continue;
switches 0:5c4d7b2438d3 208
switches 0:5c4d7b2438d3 209 j -= ( base64_dec_map[*src] == 64 );
switches 0:5c4d7b2438d3 210 x = ( x << 6 ) | ( base64_dec_map[*src] & 0x3F );
switches 0:5c4d7b2438d3 211
switches 0:5c4d7b2438d3 212 if( ++n == 4 )
switches 0:5c4d7b2438d3 213 {
switches 0:5c4d7b2438d3 214 n = 0;
switches 0:5c4d7b2438d3 215 if( j > 0 ) *p++ = (unsigned char)( x >> 16 );
switches 0:5c4d7b2438d3 216 if( j > 1 ) *p++ = (unsigned char)( x >> 8 );
switches 0:5c4d7b2438d3 217 if( j > 2 ) *p++ = (unsigned char)( x );
switches 0:5c4d7b2438d3 218 }
switches 0:5c4d7b2438d3 219 }
switches 0:5c4d7b2438d3 220
switches 0:5c4d7b2438d3 221 *olen = p - dst;
switches 0:5c4d7b2438d3 222
switches 0:5c4d7b2438d3 223 return( 0 );
switches 0:5c4d7b2438d3 224 }
switches 0:5c4d7b2438d3 225
switches 0:5c4d7b2438d3 226 #if defined(MBEDTLS_SELF_TEST)
switches 0:5c4d7b2438d3 227
switches 0:5c4d7b2438d3 228 static const unsigned char base64_test_dec[64] =
switches 0:5c4d7b2438d3 229 {
switches 0:5c4d7b2438d3 230 0x24, 0x48, 0x6E, 0x56, 0x87, 0x62, 0x5A, 0xBD,
switches 0:5c4d7b2438d3 231 0xBF, 0x17, 0xD9, 0xA2, 0xC4, 0x17, 0x1A, 0x01,
switches 0:5c4d7b2438d3 232 0x94, 0xED, 0x8F, 0x1E, 0x11, 0xB3, 0xD7, 0x09,
switches 0:5c4d7b2438d3 233 0x0C, 0xB6, 0xE9, 0x10, 0x6F, 0x22, 0xEE, 0x13,
switches 0:5c4d7b2438d3 234 0xCA, 0xB3, 0x07, 0x05, 0x76, 0xC9, 0xFA, 0x31,
switches 0:5c4d7b2438d3 235 0x6C, 0x08, 0x34, 0xFF, 0x8D, 0xC2, 0x6C, 0x38,
switches 0:5c4d7b2438d3 236 0x00, 0x43, 0xE9, 0x54, 0x97, 0xAF, 0x50, 0x4B,
switches 0:5c4d7b2438d3 237 0xD1, 0x41, 0xBA, 0x95, 0x31, 0x5A, 0x0B, 0x97
switches 0:5c4d7b2438d3 238 };
switches 0:5c4d7b2438d3 239
switches 0:5c4d7b2438d3 240 static const unsigned char base64_test_enc[] =
switches 0:5c4d7b2438d3 241 "JEhuVodiWr2/F9mixBcaAZTtjx4Rs9cJDLbpEG8i7hPK"
switches 0:5c4d7b2438d3 242 "swcFdsn6MWwINP+Nwmw4AEPpVJevUEvRQbqVMVoLlw==";
switches 0:5c4d7b2438d3 243
switches 0:5c4d7b2438d3 244 /*
switches 0:5c4d7b2438d3 245 * Checkup routine
switches 0:5c4d7b2438d3 246 */
switches 0:5c4d7b2438d3 247 int mbedtls_base64_self_test( int verbose )
switches 0:5c4d7b2438d3 248 {
switches 0:5c4d7b2438d3 249 size_t len;
switches 0:5c4d7b2438d3 250 const unsigned char *src;
switches 0:5c4d7b2438d3 251 unsigned char buffer[128];
switches 0:5c4d7b2438d3 252
switches 0:5c4d7b2438d3 253 if( verbose != 0 )
switches 0:5c4d7b2438d3 254 mbedtls_printf( " Base64 encoding test: " );
switches 0:5c4d7b2438d3 255
switches 0:5c4d7b2438d3 256 src = base64_test_dec;
switches 0:5c4d7b2438d3 257
switches 0:5c4d7b2438d3 258 if( mbedtls_base64_encode( buffer, sizeof( buffer ), &len, src, 64 ) != 0 ||
switches 0:5c4d7b2438d3 259 memcmp( base64_test_enc, buffer, 88 ) != 0 )
switches 0:5c4d7b2438d3 260 {
switches 0:5c4d7b2438d3 261 if( verbose != 0 )
switches 0:5c4d7b2438d3 262 mbedtls_printf( "failed\n" );
switches 0:5c4d7b2438d3 263
switches 0:5c4d7b2438d3 264 return( 1 );
switches 0:5c4d7b2438d3 265 }
switches 0:5c4d7b2438d3 266
switches 0:5c4d7b2438d3 267 if( verbose != 0 )
switches 0:5c4d7b2438d3 268 mbedtls_printf( "passed\n Base64 decoding test: " );
switches 0:5c4d7b2438d3 269
switches 0:5c4d7b2438d3 270 src = base64_test_enc;
switches 0:5c4d7b2438d3 271
switches 0:5c4d7b2438d3 272 if( mbedtls_base64_decode( buffer, sizeof( buffer ), &len, src, 88 ) != 0 ||
switches 0:5c4d7b2438d3 273 memcmp( base64_test_dec, buffer, 64 ) != 0 )
switches 0:5c4d7b2438d3 274 {
switches 0:5c4d7b2438d3 275 if( verbose != 0 )
switches 0:5c4d7b2438d3 276 mbedtls_printf( "failed\n" );
switches 0:5c4d7b2438d3 277
switches 0:5c4d7b2438d3 278 return( 1 );
switches 0:5c4d7b2438d3 279 }
switches 0:5c4d7b2438d3 280
switches 0:5c4d7b2438d3 281 if( verbose != 0 )
switches 0:5c4d7b2438d3 282 mbedtls_printf( "passed\n\n" );
switches 0:5c4d7b2438d3 283
switches 0:5c4d7b2438d3 284 return( 0 );
switches 0:5c4d7b2438d3 285 }
switches 0:5c4d7b2438d3 286
switches 0:5c4d7b2438d3 287 #endif /* MBEDTLS_SELF_TEST */
switches 0:5c4d7b2438d3 288
switches 0:5c4d7b2438d3 289 #endif /* MBEDTLS_BASE64_C */