gra-projekt/Implementierung/lib/md2_impls/md2_common.h

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#ifndef MD2_COMMON_H
#define MD2_COMMON_H
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#include <errno.h>
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#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
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#include "../helper.h"
#ifdef MD2_DETAILED_BENCHMARK
#define md2_process_detailed_benchmark_step_if_defined(step) \
md2_process_detailed_benchmark_step(step);
#define md2_print_detailed_benchmark_result_if_defined \
md2_print_detailed_benchmark_result();
#else
#define md2_process_detailed_benchmark_step_if_defined(step)
#define md2_print_detailed_benchmark_result_if_defined
#endif // MD2_DETAILED_BENCHMARK
#define CHECKSUM_START_MARK \
md2_process_detailed_benchmark_step_if_defined(CHECKSUM_START)
#define CHECKSUM_END_MARK \
md2_process_detailed_benchmark_step_if_defined(CHECKSUM_END)
#define FIRST_LOOP_START_MARK \
md2_process_detailed_benchmark_step_if_defined(FIRST_LOOP_START)
#define FIRST_LOOP_END_MARK \
md2_process_detailed_benchmark_step_if_defined(FIRST_LOOP_END)
#define SECOND_LOOP_START_MARK \
md2_process_detailed_benchmark_step_if_defined(SECOND_LOOP_START)
#define SECOND_LOOP_END_MARK \
md2_process_detailed_benchmark_step_if_defined(SECOND_LOOP_END)
#define END_MARK md2_print_detailed_benchmark_result_if_defined
enum md2_detailed_benchmark_step {
CHECKSUM_START = 0,
CHECKSUM_END,
FIRST_LOOP_START,
FIRST_LOOP_END,
SECOND_LOOP_START,
SECOND_LOOP_END
};
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/**
* @brief Some digits of pi
*
*/
extern unsigned char MD2_PI_SUBST[256];
/**
* @brief Print a buffer for debugging
*
* @param len length
* @param buf buffer
*/
void md2_print_buf(size_t len, uint8_t buf[len]);
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/**
* @brief Calculates checksum of buf and appends it to buf
*
* @param len Length of data which the checksum should be calculated of
* @param buf Location of the data. Make sure to reserve 16 bytes more so the
* chechsum fits!
*/
void md2_checksum(size_t len, uint8_t* buf);
/**
* @brief Calculates checksum of buf and writes it into a target
*
* @param len Length of data which the checksum should be calculated of
* @param buf Location of the data. Make sure to reserve 16 bytes more so the
* chechsum fits!
* @param checksum the output checksum
*/
void md2_checksum_with_target(size_t len, const uint8_t* buf,
uint8_t checksum[16]);
/**
* @brief Process one block of the checksum
*
* @param block the block to process
* @param checksum the output checksum
* @param l the current l
*/
void md2_process_block_checksum(uint8_t const block[16], uint8_t checksum[16],
uint8_t* l);
/**
* @brief Stores the time if start of a step, calculates the duration if end
*
* @param step the step to process
*/
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void md2_process_detailed_benchmark_step(enum md2_detailed_benchmark_step step);
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/**
* @brief Print the detailed benchmark result
*
*/
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void md2_print_detailed_benchmark_result();
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/**
* @brief Add padding and allocate extra space for the checksum
*
* @param buf buffer of the whole message
* @param len length of buf
* @return uint8_t* pointer to the new buffer
*/
uint8_t* md2_add_padding_and_space_for_checksum(const uint8_t* buf,
size_t* len);
/**
* @brief The second loop of the md2 algorithm
*
* @param messageDigestBuf the message digest buffer
*/
void md2_second_loop(uint8_t* messageDigestBuf);
/**
* @brief The first loop of the md2 algorithm
*
* @param buf buffer of the whole message
* @param messageDigestBuf the message digest buffer
* @param i the index of the 16-byte message block
*/
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void md2_first_loop(const uint8_t* buf, uint8_t* messageDigestBuf, size_t i);
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#endif // MD2_COMMON_H