4 * \brief MD2 message digest algorithm (hash function)
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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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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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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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18 * http://www.apache.org/licenses/LICENSE-2.0
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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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26 * This file is part of mbed TLS (https://tls.mbed.org)
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29 #ifndef MBEDTLS_MD2_H
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30 #define MBEDTLS_MD2_H
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32 #if !defined(MBEDTLS_CONFIG_FILE)
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35 #include MBEDTLS_CONFIG_FILE
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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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47 #if !defined(MBEDTLS_MD2_ALT)
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48 // Regular implementation
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52 * \brief MD2 context structure
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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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59 typedef struct mbedtls_md2_context
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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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66 mbedtls_md2_context;
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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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73 * \brief Initialize MD2 context
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75 * \param ctx MD2 context to be initialized
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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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82 void mbedtls_md2_init( mbedtls_md2_context *ctx );
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85 * \brief Clear MD2 context
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87 * \param ctx MD2 context to be cleared
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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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94 void mbedtls_md2_free( mbedtls_md2_context *ctx );
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97 * \brief Clone (the state of) an MD2 context
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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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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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107 void mbedtls_md2_clone( mbedtls_md2_context *dst,
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108 const mbedtls_md2_context *src );
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111 * \brief MD2 context setup
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113 * \param ctx context to be initialized
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115 * \return 0 if successful
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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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122 int mbedtls_md2_starts_ret( mbedtls_md2_context *ctx );
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125 * \brief MD2 process buffer
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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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131 * \return 0 if successful
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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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138 int mbedtls_md2_update_ret( mbedtls_md2_context *ctx,
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139 const unsigned char *input,
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143 * \brief MD2 final digest
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145 * \param ctx MD2 context
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146 * \param output MD2 checksum result
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148 * \return 0 if successful
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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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155 int mbedtls_md2_finish_ret( mbedtls_md2_context *ctx,
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156 unsigned char output[16] );
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159 * \brief MD2 process data block (internal use only)
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161 * \param ctx MD2 context
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163 * \return 0 if successful
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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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170 int mbedtls_internal_md2_process( mbedtls_md2_context *ctx );
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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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176 #define MBEDTLS_DEPRECATED
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179 * \brief MD2 context setup
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181 * \deprecated Superseded by mbedtls_md2_starts_ret() in 2.7.0
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183 * \param ctx context to be initialized
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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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190 MBEDTLS_DEPRECATED void mbedtls_md2_starts( mbedtls_md2_context *ctx );
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193 * \brief MD2 process buffer
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195 * \deprecated Superseded by mbedtls_md2_update_ret() in 2.7.0
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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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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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206 MBEDTLS_DEPRECATED void mbedtls_md2_update( mbedtls_md2_context *ctx,
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207 const unsigned char *input,
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211 * \brief MD2 final digest
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213 * \deprecated Superseded by mbedtls_md2_finish_ret() in 2.7.0
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215 * \param ctx MD2 context
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216 * \param output MD2 checksum result
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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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223 MBEDTLS_DEPRECATED void mbedtls_md2_finish( mbedtls_md2_context *ctx,
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224 unsigned char output[16] );
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227 * \brief MD2 process data block (internal use only)
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229 * \deprecated Superseded by mbedtls_internal_md2_process() in 2.7.0
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231 * \param ctx MD2 context
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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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238 MBEDTLS_DEPRECATED void mbedtls_md2_process( mbedtls_md2_context *ctx );
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240 #undef MBEDTLS_DEPRECATED
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241 #endif /* !MBEDTLS_DEPRECATED_REMOVED */
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244 * \brief Output = MD2( input buffer )
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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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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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255 int mbedtls_md2_ret( const unsigned char *input,
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257 unsigned char output[16] );
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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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263 #define MBEDTLS_DEPRECATED
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266 * \brief Output = MD2( input buffer )
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268 * \deprecated Superseded by mbedtls_md2_ret() in 2.7.0
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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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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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279 MBEDTLS_DEPRECATED void mbedtls_md2( const unsigned char *input,
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281 unsigned char output[16] );
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283 #undef MBEDTLS_DEPRECATED
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284 #endif /* !MBEDTLS_DEPRECATED_REMOVED */
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286 #if defined(MBEDTLS_SELF_TEST)
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289 * \brief Checkup routine
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291 * \return 0 if successful, or 1 if the test failed
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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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298 int mbedtls_md2_self_test( int verbose );
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300 #endif /* MBEDTLS_SELF_TEST */
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306 #endif /* mbedtls_md2.h */
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