1 | /**
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2 | * \file md2.h
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3 | *
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4 | * \brief MD2 message digest algorithm (hash function)
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5 | *
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6 | * \warning MD2 is considered a weak message digest and its use constitutes a
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7 | * security risk. We recommend considering stronger message digests
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8 | * instead.
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9 | */
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10 | /*
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11 | * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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12 | * SPDX-License-Identifier: Apache-2.0
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13 | *
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14 | * Licensed under the Apache License, Version 2.0 (the "License"); you may
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15 | * not use this file except in compliance with the License.
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16 | * You may obtain a copy of the License at
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17 | *
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18 | * http://www.apache.org/licenses/LICENSE-2.0
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19 | *
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20 | * Unless required by applicable law or agreed to in writing, software
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21 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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22 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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23 | * See the License for the specific language governing permissions and
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24 | * limitations under the License.
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25 | *
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26 | * This file is part of mbed TLS (https://tls.mbed.org)
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27 | *
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28 | */
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29 | #ifndef MBEDTLS_MD2_H
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30 | #define MBEDTLS_MD2_H
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31 |
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32 | #if !defined(MBEDTLS_CONFIG_FILE)
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33 | #include "config.h"
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34 | #else
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35 | #include MBEDTLS_CONFIG_FILE
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36 | #endif
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37 |
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38 | #include <stddef.h>
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39 |
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40 | /* MBEDTLS_ERR_MD2_HW_ACCEL_FAILED is deprecated and should not be used. */
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41 | #define MBEDTLS_ERR_MD2_HW_ACCEL_FAILED -0x002B /**< MD2 hardware accelerator failed */
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42 |
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43 | #ifdef __cplusplus
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44 | extern "C" {
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45 | #endif
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46 |
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47 | #if !defined(MBEDTLS_MD2_ALT)
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48 | // Regular implementation
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49 | //
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50 |
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51 | /**
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52 | * \brief MD2 context structure
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53 | *
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54 | * \warning MD2 is considered a weak message digest and its use
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55 | * constitutes a security risk. We recommend considering
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56 | * stronger message digests instead.
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57 | *
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58 | */
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59 | typedef struct mbedtls_md2_context
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60 | {
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61 | unsigned char cksum[16]; /*!< checksum of the data block */
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62 | unsigned char state[48]; /*!< intermediate digest state */
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63 | unsigned char buffer[16]; /*!< data block being processed */
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64 | size_t left; /*!< amount of data in buffer */
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65 | }
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66 | mbedtls_md2_context;
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67 |
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68 | #else /* MBEDTLS_MD2_ALT */
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69 | #include "md2_alt.h"
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70 | #endif /* MBEDTLS_MD2_ALT */
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71 |
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72 | /**
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73 | * \brief Initialize MD2 context
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74 | *
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75 | * \param ctx MD2 context to be initialized
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76 | *
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77 | * \warning MD2 is considered a weak message digest and its use
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78 | * constitutes a security risk. We recommend considering
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79 | * stronger message digests instead.
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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 | /**
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85 | * \brief Clear MD2 context
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86 | *
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87 | * \param ctx MD2 context to be cleared
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88 | *
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89 | * \warning MD2 is considered a weak message digest and its use
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90 | * constitutes a security risk. We recommend considering
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91 | * stronger message digests instead.
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92 | *
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93 | */
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94 | void mbedtls_md2_free( mbedtls_md2_context *ctx );
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95 |
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96 | /**
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97 | * \brief Clone (the state of) an MD2 context
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98 | *
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99 | * \param dst The destination context
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100 | * \param src The context to be cloned
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101 | *
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102 | * \warning MD2 is considered a weak message digest and its use
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103 | * constitutes a security risk. We recommend considering
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104 | * stronger message digests instead.
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105 | *
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106 | */
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107 | void mbedtls_md2_clone( mbedtls_md2_context *dst,
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108 | const mbedtls_md2_context *src );
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109 |
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110 | /**
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111 | * \brief MD2 context setup
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112 | *
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113 | * \param ctx context to be initialized
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114 | *
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115 | * \return 0 if successful
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116 | *
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117 | * \warning MD2 is considered a weak message digest and its use
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118 | * constitutes a security risk. We recommend considering
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119 | * stronger message digests instead.
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120 | *
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121 | */
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122 | int mbedtls_md2_starts_ret( mbedtls_md2_context *ctx );
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123 |
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124 | /**
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125 | * \brief MD2 process buffer
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126 | *
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127 | * \param ctx MD2 context
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128 | * \param input buffer holding the data
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129 | * \param ilen length of the input data
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130 | *
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131 | * \return 0 if successful
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132 | *
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133 | * \warning MD2 is considered a weak message digest and its use
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134 | * constitutes a security risk. We recommend considering
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135 | * stronger message digests instead.
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136 | *
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137 | */
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138 | int mbedtls_md2_update_ret( mbedtls_md2_context *ctx,
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139 | const unsigned char *input,
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140 | size_t ilen );
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141 |
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142 | /**
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143 | * \brief MD2 final digest
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144 | *
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145 | * \param ctx MD2 context
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146 | * \param output MD2 checksum result
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147 | *
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148 | * \return 0 if successful
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149 | *
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150 | * \warning MD2 is considered a weak message digest and its use
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151 | * constitutes a security risk. We recommend considering
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152 | * stronger message digests instead.
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153 | *
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154 | */
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155 | int mbedtls_md2_finish_ret( mbedtls_md2_context *ctx,
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156 | unsigned char output[16] );
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157 |
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158 | /**
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159 | * \brief MD2 process data block (internal use only)
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160 | *
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161 | * \param ctx MD2 context
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162 | *
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163 | * \return 0 if successful
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164 | *
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165 | * \warning MD2 is considered a weak message digest and its use
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166 | * constitutes a security risk. We recommend considering
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167 | * stronger message digests instead.
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168 | *
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169 | */
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170 | int mbedtls_internal_md2_process( mbedtls_md2_context *ctx );
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171 |
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172 | #if !defined(MBEDTLS_DEPRECATED_REMOVED)
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173 | #if defined(MBEDTLS_DEPRECATED_WARNING)
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174 | #define MBEDTLS_DEPRECATED __attribute__((deprecated))
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175 | #else
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176 | #define MBEDTLS_DEPRECATED
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177 | #endif
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178 | /**
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179 | * \brief MD2 context setup
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180 | *
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181 | * \deprecated Superseded by mbedtls_md2_starts_ret() in 2.7.0
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182 | *
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183 | * \param ctx context to be initialized
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184 | *
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185 | * \warning MD2 is considered a weak message digest and its use
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186 | * constitutes a security risk. We recommend considering
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187 | * stronger message digests instead.
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188 | *
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189 | */
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190 | MBEDTLS_DEPRECATED void mbedtls_md2_starts( mbedtls_md2_context *ctx );
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191 |
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192 | /**
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193 | * \brief MD2 process buffer
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194 | *
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195 | * \deprecated Superseded by mbedtls_md2_update_ret() in 2.7.0
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196 | *
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197 | * \param ctx MD2 context
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198 | * \param input buffer holding the data
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199 | * \param ilen length of the input data
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200 | *
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201 | * \warning MD2 is considered a weak message digest and its use
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202 | * constitutes a security risk. We recommend considering
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203 | * stronger message digests instead.
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204 | *
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205 | */
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206 | MBEDTLS_DEPRECATED void mbedtls_md2_update( mbedtls_md2_context *ctx,
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207 | const unsigned char *input,
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208 | size_t ilen );
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209 |
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210 | /**
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211 | * \brief MD2 final digest
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212 | *
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213 | * \deprecated Superseded by mbedtls_md2_finish_ret() in 2.7.0
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214 | *
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215 | * \param ctx MD2 context
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216 | * \param output MD2 checksum result
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217 | *
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218 | * \warning MD2 is considered a weak message digest and its use
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219 | * constitutes a security risk. We recommend considering
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220 | * stronger message digests instead.
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221 | *
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222 | */
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223 | MBEDTLS_DEPRECATED void mbedtls_md2_finish( mbedtls_md2_context *ctx,
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224 | unsigned char output[16] );
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225 |
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226 | /**
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227 | * \brief MD2 process data block (internal use only)
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228 | *
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229 | * \deprecated Superseded by mbedtls_internal_md2_process() in 2.7.0
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230 | *
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231 | * \param ctx MD2 context
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232 | *
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233 | * \warning MD2 is considered a weak message digest and its use
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234 | * constitutes a security risk. We recommend considering
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235 | * stronger message digests instead.
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236 | *
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237 | */
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238 | MBEDTLS_DEPRECATED void mbedtls_md2_process( mbedtls_md2_context *ctx );
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239 |
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240 | #undef MBEDTLS_DEPRECATED
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241 | #endif /* !MBEDTLS_DEPRECATED_REMOVED */
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242 |
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243 | /**
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244 | * \brief Output = MD2( input buffer )
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245 | *
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246 | * \param input buffer holding the data
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247 | * \param ilen length of the input data
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248 | * \param output MD2 checksum result
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249 | *
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250 | * \warning MD2 is considered a weak message digest and its use
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251 | * constitutes a security risk. We recommend considering
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252 | * stronger message digests instead.
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253 | *
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254 | */
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255 | int mbedtls_md2_ret( const unsigned char *input,
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256 | size_t ilen,
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257 | unsigned char output[16] );
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258 |
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259 | #if !defined(MBEDTLS_DEPRECATED_REMOVED)
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260 | #if defined(MBEDTLS_DEPRECATED_WARNING)
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261 | #define MBEDTLS_DEPRECATED __attribute__((deprecated))
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262 | #else
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263 | #define MBEDTLS_DEPRECATED
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264 | #endif
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265 | /**
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266 | * \brief Output = MD2( input buffer )
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267 | *
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268 | * \deprecated Superseded by mbedtls_md2_ret() in 2.7.0
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269 | *
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270 | * \param input buffer holding the data
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271 | * \param ilen length of the input data
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272 | * \param output MD2 checksum result
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273 | *
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274 | * \warning MD2 is considered a weak message digest and its use
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275 | * constitutes a security risk. We recommend considering
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276 | * stronger message digests instead.
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277 | *
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278 | */
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279 | MBEDTLS_DEPRECATED void mbedtls_md2( const unsigned char *input,
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280 | size_t ilen,
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281 | unsigned char output[16] );
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282 |
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283 | #undef MBEDTLS_DEPRECATED
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284 | #endif /* !MBEDTLS_DEPRECATED_REMOVED */
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285 |
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286 | #if defined(MBEDTLS_SELF_TEST)
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287 |
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288 | /**
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289 | * \brief Checkup routine
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290 | *
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291 | * \return 0 if successful, or 1 if the test failed
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292 | *
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293 | * \warning MD2 is considered a weak message digest and its use
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294 | * constitutes a security risk. We recommend considering
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295 | * stronger message digests instead.
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296 | *
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297 | */
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298 | int mbedtls_md2_self_test( int verbose );
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299 |
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300 | #endif /* MBEDTLS_SELF_TEST */
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301 |
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302 | #ifdef __cplusplus
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303 | }
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304 | #endif
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305 |
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306 | #endif /* mbedtls_md2.h */
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