1 | /*
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2 | * RFC 1115/1319 compliant MD2 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 | * The MD2 algorithm was designed by Ron Rivest in 1989.
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23 | *
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24 | * http://www.ietf.org/rfc/rfc1115.txt
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25 | * http://www.ietf.org/rfc/rfc1319.txt
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26 | */
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27 |
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28 | #if !defined(MBEDTLS_CONFIG_FILE)
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29 | #include "mbedtls/config.h"
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30 | #else
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31 | #include MBEDTLS_CONFIG_FILE
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32 | #endif
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33 |
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34 | #if defined(MBEDTLS_MD2_C)
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35 |
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36 | #include "mbedtls/md2.h"
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37 | #include "mbedtls/platform_util.h"
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38 |
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39 | #include <string.h>
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40 |
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41 | #if defined(MBEDTLS_SELF_TEST)
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42 | #if defined(MBEDTLS_PLATFORM_C)
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43 | #include "mbedtls/platform.h"
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44 | #else
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45 | #include <stdio.h>
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46 | #define mbedtls_printf printf
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47 | #endif /* MBEDTLS_PLATFORM_C */
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48 | #endif /* MBEDTLS_SELF_TEST */
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49 |
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50 | #if !defined(MBEDTLS_MD2_ALT)
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51 |
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52 | static const unsigned char PI_SUBST[256] =
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53 | {
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54 | 0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01, 0x3D, 0x36,
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55 | 0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13, 0x62, 0xA7, 0x05, 0xF3,
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56 | 0xC0, 0xC7, 0x73, 0x8C, 0x98, 0x93, 0x2B, 0xD9, 0xBC, 0x4C,
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57 | 0x82, 0xCA, 0x1E, 0x9B, 0x57, 0x3C, 0xFD, 0xD4, 0xE0, 0x16,
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58 | 0x67, 0x42, 0x6F, 0x18, 0x8A, 0x17, 0xE5, 0x12, 0xBE, 0x4E,
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59 | 0xC4, 0xD6, 0xDA, 0x9E, 0xDE, 0x49, 0xA0, 0xFB, 0xF5, 0x8E,
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60 | 0xBB, 0x2F, 0xEE, 0x7A, 0xA9, 0x68, 0x79, 0x91, 0x15, 0xB2,
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61 | 0x07, 0x3F, 0x94, 0xC2, 0x10, 0x89, 0x0B, 0x22, 0x5F, 0x21,
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62 | 0x80, 0x7F, 0x5D, 0x9A, 0x5A, 0x90, 0x32, 0x27, 0x35, 0x3E,
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63 | 0xCC, 0xE7, 0xBF, 0xF7, 0x97, 0x03, 0xFF, 0x19, 0x30, 0xB3,
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64 | 0x48, 0xA5, 0xB5, 0xD1, 0xD7, 0x5E, 0x92, 0x2A, 0xAC, 0x56,
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65 | 0xAA, 0xC6, 0x4F, 0xB8, 0x38, 0xD2, 0x96, 0xA4, 0x7D, 0xB6,
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66 | 0x76, 0xFC, 0x6B, 0xE2, 0x9C, 0x74, 0x04, 0xF1, 0x45, 0x9D,
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67 | 0x70, 0x59, 0x64, 0x71, 0x87, 0x20, 0x86, 0x5B, 0xCF, 0x65,
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68 | 0xE6, 0x2D, 0xA8, 0x02, 0x1B, 0x60, 0x25, 0xAD, 0xAE, 0xB0,
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69 | 0xB9, 0xF6, 0x1C, 0x46, 0x61, 0x69, 0x34, 0x40, 0x7E, 0x0F,
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70 | 0x55, 0x47, 0xA3, 0x23, 0xDD, 0x51, 0xAF, 0x3A, 0xC3, 0x5C,
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71 | 0xF9, 0xCE, 0xBA, 0xC5, 0xEA, 0x26, 0x2C, 0x53, 0x0D, 0x6E,
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72 | 0x85, 0x28, 0x84, 0x09, 0xD3, 0xDF, 0xCD, 0xF4, 0x41, 0x81,
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73 | 0x4D, 0x52, 0x6A, 0xDC, 0x37, 0xC8, 0x6C, 0xC1, 0xAB, 0xFA,
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74 | 0x24, 0xE1, 0x7B, 0x08, 0x0C, 0xBD, 0xB1, 0x4A, 0x78, 0x88,
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75 | 0x95, 0x8B, 0xE3, 0x63, 0xE8, 0x6D, 0xE9, 0xCB, 0xD5, 0xFE,
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76 | 0x3B, 0x00, 0x1D, 0x39, 0xF2, 0xEF, 0xB7, 0x0E, 0x66, 0x58,
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77 | 0xD0, 0xE4, 0xA6, 0x77, 0x72, 0xF8, 0xEB, 0x75, 0x4B, 0x0A,
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78 | 0x31, 0x44, 0x50, 0xB4, 0x8F, 0xED, 0x1F, 0x1A, 0xDB, 0x99,
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79 | 0x8D, 0x33, 0x9F, 0x11, 0x83, 0x14
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80 | };
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81 |
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82 | void mbedtls_md2_init( mbedtls_md2_context *ctx )
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83 | {
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84 | memset( ctx, 0, sizeof( mbedtls_md2_context ) );
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85 | }
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86 |
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87 | void mbedtls_md2_free( mbedtls_md2_context *ctx )
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88 | {
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89 | if( ctx == NULL )
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90 | return;
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91 |
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92 | mbedtls_platform_zeroize( ctx, sizeof( mbedtls_md2_context ) );
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93 | }
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94 |
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95 | void mbedtls_md2_clone( mbedtls_md2_context *dst,
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96 | const mbedtls_md2_context *src )
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97 | {
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98 | *dst = *src;
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99 | }
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100 |
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101 | /*
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102 | * MD2 context setup
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103 | */
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104 | int mbedtls_md2_starts_ret( mbedtls_md2_context *ctx )
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105 | {
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106 | memset( ctx->cksum, 0, 16 );
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107 | memset( ctx->state, 0, 46 );
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108 | memset( ctx->buffer, 0, 16 );
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109 | ctx->left = 0;
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110 |
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111 | return( 0 );
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112 | }
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113 |
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114 | #if !defined(MBEDTLS_DEPRECATED_REMOVED)
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115 | void mbedtls_md2_starts( mbedtls_md2_context *ctx )
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116 | {
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117 | mbedtls_md2_starts_ret( ctx );
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118 | }
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119 | #endif
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120 |
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121 | #if !defined(MBEDTLS_MD2_PROCESS_ALT)
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122 | int mbedtls_internal_md2_process( mbedtls_md2_context *ctx )
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123 | {
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124 | int i, j;
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125 | unsigned char t = 0;
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126 |
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127 | for( i = 0; i < 16; i++ )
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128 | {
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129 | ctx->state[i + 16] = ctx->buffer[i];
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130 | ctx->state[i + 32] =
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131 | (unsigned char)( ctx->buffer[i] ^ ctx->state[i]);
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132 | }
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133 |
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134 | for( i = 0; i < 18; i++ )
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135 | {
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136 | for( j = 0; j < 48; j++ )
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137 | {
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138 | ctx->state[j] = (unsigned char)
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139 | ( ctx->state[j] ^ PI_SUBST[t] );
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140 | t = ctx->state[j];
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141 | }
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142 |
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143 | t = (unsigned char)( t + i );
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144 | }
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145 |
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146 | t = ctx->cksum[15];
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147 |
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148 | for( i = 0; i < 16; i++ )
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149 | {
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150 | ctx->cksum[i] = (unsigned char)
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151 | ( ctx->cksum[i] ^ PI_SUBST[ctx->buffer[i] ^ t] );
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152 | t = ctx->cksum[i];
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153 | }
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154 |
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155 | return( 0 );
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156 | }
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157 |
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158 | #if !defined(MBEDTLS_DEPRECATED_REMOVED)
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159 | void mbedtls_md2_process( mbedtls_md2_context *ctx )
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160 | {
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161 | mbedtls_internal_md2_process( ctx );
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162 | }
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163 | #endif
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164 | #endif /* !MBEDTLS_MD2_PROCESS_ALT */
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165 |
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166 | /*
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167 | * MD2 process buffer
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168 | */
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169 | int mbedtls_md2_update_ret( mbedtls_md2_context *ctx,
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170 | const unsigned char *input,
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171 | size_t ilen )
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172 | {
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173 | int ret;
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174 | size_t fill;
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175 |
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176 | while( ilen > 0 )
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177 | {
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178 | if( ilen > 16 - ctx->left )
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179 | fill = 16 - ctx->left;
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180 | else
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181 | fill = ilen;
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182 |
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183 | memcpy( ctx->buffer + ctx->left, input, fill );
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184 |
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185 | ctx->left += fill;
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186 | input += fill;
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187 | ilen -= fill;
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188 |
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189 | if( ctx->left == 16 )
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190 | {
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191 | ctx->left = 0;
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192 | if( ( ret = mbedtls_internal_md2_process( ctx ) ) != 0 )
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193 | return( ret );
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194 | }
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195 | }
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196 |
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197 | return( 0 );
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198 | }
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199 |
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200 | #if !defined(MBEDTLS_DEPRECATED_REMOVED)
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201 | void mbedtls_md2_update( mbedtls_md2_context *ctx,
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202 | const unsigned char *input,
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203 | size_t ilen )
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204 | {
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205 | mbedtls_md2_update_ret( ctx, input, ilen );
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206 | }
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207 | #endif
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208 |
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209 | /*
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210 | * MD2 final digest
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211 | */
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212 | int mbedtls_md2_finish_ret( mbedtls_md2_context *ctx,
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213 | unsigned char output[16] )
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214 | {
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215 | int ret;
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216 | size_t i;
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217 | unsigned char x;
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218 |
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219 | x = (unsigned char)( 16 - ctx->left );
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220 |
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221 | for( i = ctx->left; i < 16; i++ )
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222 | ctx->buffer[i] = x;
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223 |
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224 | if( ( ret = mbedtls_internal_md2_process( ctx ) ) != 0 )
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225 | return( ret );
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226 |
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227 | memcpy( ctx->buffer, ctx->cksum, 16 );
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228 | if( ( ret = mbedtls_internal_md2_process( ctx ) ) != 0 )
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229 | return( ret );
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230 |
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231 | memcpy( output, ctx->state, 16 );
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232 |
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233 | return( 0 );
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234 | }
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235 |
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236 | #if !defined(MBEDTLS_DEPRECATED_REMOVED)
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237 | void mbedtls_md2_finish( mbedtls_md2_context *ctx,
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238 | unsigned char output[16] )
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239 | {
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240 | mbedtls_md2_finish_ret( ctx, output );
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241 | }
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242 | #endif
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243 |
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244 | #endif /* !MBEDTLS_MD2_ALT */
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245 |
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246 | /*
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247 | * output = MD2( input buffer )
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248 | */
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249 | int mbedtls_md2_ret( const unsigned char *input,
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250 | size_t ilen,
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251 | unsigned char output[16] )
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252 | {
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253 | int ret;
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254 | mbedtls_md2_context ctx;
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255 |
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256 | mbedtls_md2_init( &ctx );
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257 |
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258 | if( ( ret = mbedtls_md2_starts_ret( &ctx ) ) != 0 )
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259 | goto exit;
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260 |
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261 | if( ( ret = mbedtls_md2_update_ret( &ctx, input, ilen ) ) != 0 )
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262 | goto exit;
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263 |
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264 | if( ( ret = mbedtls_md2_finish_ret( &ctx, output ) ) != 0 )
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265 | goto exit;
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266 |
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267 | exit:
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268 | mbedtls_md2_free( &ctx );
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269 |
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270 | return( ret );
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271 | }
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272 |
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273 | #if !defined(MBEDTLS_DEPRECATED_REMOVED)
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274 | void mbedtls_md2( const unsigned char *input,
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275 | size_t ilen,
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276 | unsigned char output[16] )
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277 | {
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278 | mbedtls_md2_ret( input, ilen, output );
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279 | }
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280 | #endif
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281 |
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282 | #if defined(MBEDTLS_SELF_TEST)
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283 |
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284 | /*
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285 | * RFC 1319 test vectors
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286 | */
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287 | static const unsigned char md2_test_str[7][81] =
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288 | {
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289 | { "" },
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290 | { "a" },
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291 | { "abc" },
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292 | { "message digest" },
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293 | { "abcdefghijklmnopqrstuvwxyz" },
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294 | { "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789" },
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295 | { "12345678901234567890123456789012345678901234567890123456789012"
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296 | "345678901234567890" }
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297 | };
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298 |
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299 | static const size_t md2_test_strlen[7] =
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300 | {
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301 | 0, 1, 3, 14, 26, 62, 80
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302 | };
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303 |
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304 | static const unsigned char md2_test_sum[7][16] =
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305 | {
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306 | { 0x83, 0x50, 0xE5, 0xA3, 0xE2, 0x4C, 0x15, 0x3D,
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307 | 0xF2, 0x27, 0x5C, 0x9F, 0x80, 0x69, 0x27, 0x73 },
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308 | { 0x32, 0xEC, 0x01, 0xEC, 0x4A, 0x6D, 0xAC, 0x72,
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309 | 0xC0, 0xAB, 0x96, 0xFB, 0x34, 0xC0, 0xB5, 0xD1 },
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310 | { 0xDA, 0x85, 0x3B, 0x0D, 0x3F, 0x88, 0xD9, 0x9B,
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311 | 0x30, 0x28, 0x3A, 0x69, 0xE6, 0xDE, 0xD6, 0xBB },
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312 | { 0xAB, 0x4F, 0x49, 0x6B, 0xFB, 0x2A, 0x53, 0x0B,
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313 | 0x21, 0x9F, 0xF3, 0x30, 0x31, 0xFE, 0x06, 0xB0 },
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314 | { 0x4E, 0x8D, 0xDF, 0xF3, 0x65, 0x02, 0x92, 0xAB,
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315 | 0x5A, 0x41, 0x08, 0xC3, 0xAA, 0x47, 0x94, 0x0B },
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316 | { 0xDA, 0x33, 0xDE, 0xF2, 0xA4, 0x2D, 0xF1, 0x39,
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317 | 0x75, 0x35, 0x28, 0x46, 0xC3, 0x03, 0x38, 0xCD },
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318 | { 0xD5, 0x97, 0x6F, 0x79, 0xD8, 0x3D, 0x3A, 0x0D,
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319 | 0xC9, 0x80, 0x6C, 0x3C, 0x66, 0xF3, 0xEF, 0xD8 }
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320 | };
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321 |
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322 | /*
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323 | * Checkup routine
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324 | */
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325 | int mbedtls_md2_self_test( int verbose )
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326 | {
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327 | int i, ret = 0;
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328 | unsigned char md2sum[16];
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329 |
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330 | for( i = 0; i < 7; i++ )
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331 | {
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332 | if( verbose != 0 )
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333 | mbedtls_printf( " MD2 test #%d: ", i + 1 );
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334 |
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335 | ret = mbedtls_md2_ret( md2_test_str[i], md2_test_strlen[i], md2sum );
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336 | if( ret != 0 )
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337 | goto fail;
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338 |
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339 | if( memcmp( md2sum, md2_test_sum[i], 16 ) != 0 )
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340 | {
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341 | ret = 1;
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342 | goto fail;
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343 | }
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344 |
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345 | if( verbose != 0 )
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346 | mbedtls_printf( "passed\n" );
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347 | }
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348 |
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349 | if( verbose != 0 )
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350 | mbedtls_printf( "\n" );
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351 |
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352 | return( 0 );
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353 |
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354 | fail:
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355 | if( verbose != 0 )
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356 | mbedtls_printf( "failed\n" );
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357 |
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358 | return( ret );
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359 | }
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360 |
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361 | #endif /* MBEDTLS_SELF_TEST */
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362 |
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363 | #endif /* MBEDTLS_MD2_C */
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