md2.h

00001 /**
00002  * \file mbedtls_md2.h
00003  *
00004  * \brief MD2 message digest algorithm (hash function)
00005  *
00006  *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
00007  *  SPDX-License-Identifier: Apache-2.0
00008  *
00009  *  Licensed under the Apache License, Version 2.0 (the "License"); you may
00010  *  not use this file except in compliance with the License.
00011  *  You may obtain a copy of the License at
00012  *
00013  *  http://www.apache.org/licenses/LICENSE-2.0
00014  *
00015  *  Unless required by applicable law or agreed to in writing, software
00016  *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
00017  *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00018  *  See the License for the specific language governing permissions and
00019  *  limitations under the License.
00020  *
00021  *  This file is part of mbed TLS (https://tls.mbed.org)
00022  */
00023 #ifndef MBEDTLS_MD2_H
00024 #define MBEDTLS_MD2_H
00025 
00026 #if !defined(MBEDTLS_CONFIG_FILE)
00027 #include "config.h"
00028 #else
00029 #include MBEDTLS_CONFIG_FILE
00030 #endif
00031 
00032 #include <stddef.h>
00033 
00034 #if !defined(MBEDTLS_MD2_ALT)
00035 // Regular implementation
00036 //
00037 
00038 #ifdef __cplusplus
00039 extern "C" {
00040 #endif
00041 
00042 /**
00043  * \brief          MD2 context structure
00044  */
00045 typedef struct
00046 {
00047     unsigned char cksum[16];    /*!< checksum of the data block */
00048     unsigned char state[48];    /*!< intermediate digest state  */
00049     unsigned char buffer[16];   /*!< data block being processed */
00050     size_t left ;                /*!< amount of data in buffer   */
00051 }
00052 mbedtls_md2_context;
00053 
00054 /**
00055  * \brief          Initialize MD2 context
00056  *
00057  * \param ctx      MD2 context to be initialized
00058  */
00059 void mbedtls_md2_init( mbedtls_md2_context *ctx );
00060 
00061 /**
00062  * \brief          Clear MD2 context
00063  *
00064  * \param ctx      MD2 context to be cleared
00065  */
00066 void mbedtls_md2_free( mbedtls_md2_context *ctx );
00067 
00068 /**
00069  * \brief          Clone (the state of) an MD2 context
00070  *
00071  * \param dst      The destination context
00072  * \param src      The context to be cloned
00073  */
00074 void mbedtls_md2_clone( mbedtls_md2_context *dst,
00075                         const mbedtls_md2_context *src );
00076 
00077 /**
00078  * \brief          MD2 context setup
00079  *
00080  * \param ctx      context to be initialized
00081  */
00082 void mbedtls_md2_starts( mbedtls_md2_context *ctx );
00083 
00084 /**
00085  * \brief          MD2 process buffer
00086  *
00087  * \param ctx      MD2 context
00088  * \param input    buffer holding the  data
00089  * \param ilen     length of the input data
00090  */
00091 void mbedtls_md2_update( mbedtls_md2_context *ctx, const unsigned char *input, size_t ilen );
00092 
00093 /**
00094  * \brief          MD2 final digest
00095  *
00096  * \param ctx      MD2 context
00097  * \param output   MD2 checksum result
00098  */
00099 void mbedtls_md2_finish( mbedtls_md2_context *ctx, unsigned char output[16] );
00100 
00101 #ifdef __cplusplus
00102 }
00103 #endif
00104 
00105 #else  /* MBEDTLS_MD2_ALT */
00106 #include "md2_alt.h"
00107 #endif /* MBEDTLS_MD2_ALT */
00108 
00109 #ifdef __cplusplus
00110 extern "C" {
00111 #endif
00112 
00113 /**
00114  * \brief          Output = MD2( input buffer )
00115  *
00116  * \param input    buffer holding the  data
00117  * \param ilen     length of the input data
00118  * \param output   MD2 checksum result
00119  */
00120 void mbedtls_md2( const unsigned char *input, size_t ilen, unsigned char output[16] );
00121 
00122 /**
00123  * \brief          Checkup routine
00124  *
00125  * \return         0 if successful, or 1 if the test failed
00126  */
00127 int mbedtls_md2_self_test( int verbose );
00128 
00129 /* Internal use */
00130 void mbedtls_md2_process( mbedtls_md2_context *ctx );
00131 
00132 #ifdef __cplusplus
00133 }
00134 #endif
00135 
00136 #endif /* mbedtls_md2.h */