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add code for assignment 05 asyd crypto

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Jonas Arnold 3 years ago
parent 0a90d5455c
commit 2b17532f05
4 changed files with 296 additions and 0 deletions
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  1. 10
      ASYD_Cryptograhpy/ASYD_Cryptograhpy.sln
  2. 138
      ASYD_Cryptograhpy/SW05-SHA1/SW05-SHA1.vcxproj
  3. 27
      ASYD_Cryptograhpy/SW05-SHA1/SW05-SHA1.vcxproj.filters
  4. 121
      ASYD_Cryptograhpy/SW05-SHA1/main.c

10
ASYD_Cryptograhpy/ASYD_Cryptograhpy.sln
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@ -11,6 +11,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "SW03-DHKE", "SW03-DHKE\SW03
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EndProject
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138
ASYD_Cryptograhpy/SW05-SHA1/SW05-SHA1.vcxproj
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@ -0,0 +1,138 @@
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27
ASYD_Cryptograhpy/SW05-SHA1/SW05-SHA1.vcxproj.filters
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121
ASYD_Cryptograhpy/SW05-SHA1/main.c
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@ -0,0 +1,121 @@
/**
*--------------------------------------------------------------------\n
* HSLU T&A Hochschule Luzern Technik+Architektur \n
*--------------------------------------------------------------------\n
*
* \brief ASYD assignment crypto 05
* \file
* \author Basil Estermann, basil.estermann@stud.hslu.ch
* Simon Frei, simon.frei@stud.hslu.ch
* Jonas Arnold, jonas.arnold@stud.hslu.ch
* \date 23.03.2023
*
*--------------------------------------------------------------------
*/
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#define VALUE_LENGTH 32
#define MESSAGE_DIGEST_LENGTH 160
#define BLOCK_LENGTH (512/8)
#define INPUT_MESSAGE ("Testnachricht 123")
#pragma region SHA1-Constants
#define H0 0x67452301
#define H1 0xEFCDAB89
#define H2 0x98BADCFE
#define H3 0x10325476
#define H4 0xC3D2E1F0
#pragma endregion
void printBits(size_t const size, void const* const ptr);
uint32_t leftRotate(uint32_t n, uint32_t d);
void main(void) {
int result = 0;
printf("------ Set initial hash value ------\n\n");
#pragma region Initial Hash values
uint32_t h0, h1, h2, h3, h4;
h0 = H0;
h1 = H1;
h2 = H2;
h3 = H3;
h4 = H4;
#pragma endregion
if (sizeof(INPUT_MESSAGE) * 8 > 447) {
printf("Message too long!");
return 1000002;
}
printf("------ Padding message ------\n\n");
#pragma region Padding
unsigned char messageNoPadding[] = INPUT_MESSAGE;
printf("Size of message without padding: %i bits\n", sizeof(INPUT_MESSAGE) * 8);
printf("Message without padding\n");
printBits(sizeof(messageNoPadding), &messageNoPadding);
unsigned char message[BLOCK_LENGTH] = "";
// fill in message
for (uint32_t i = 0; i < sizeof(INPUT_MESSAGE); i++)
{
message[i] = INPUT_MESSAGE[i];
}
// set bit
message[sizeof(INPUT_MESSAGE)] = 0b10000000;
printf("\nMessage after adding 1: \n");
printBits(sizeof(message), &message);
message[BLOCK_LENGTH - 1] = sizeof(INPUT_MESSAGE) * 8;
printf("\nMessage after length 1: \n");
printBits(sizeof(message), &message);
#pragma endregion
printf("------ Message scheduling ------\n\n");
#pragma region Message scheduling
uint32_t WordArray[80] = { 0 };
for (uint32_t i = 0; i < 16; i++) {
uint32_t currentbyte = message[i] << 24;
uint32_t tmp = (uint32_t)(((uint8_t)(message[i * 4]) << 24) + ((uint8_t)(message[4 * i + 1]) << 16) + ((uint8_t)(message[4 * i + 2]) << 8) + (uint8_t)(message[4 * i + 3]));
WordArray[i] = tmp;
}
for (uint32_t i = 16; i < 80; i++) {
WordArray[i] = leftRotate((WordArray[i - 3] ^ WordArray[i - 8] ^ WordArray[i - 14] ^ WordArray[i - 16]), 1);
}
#pragma endregion
return 0;
}
uint32_t leftRotate(uint32_t n, uint32_t d)
{
/* In n<<d, last d bits are 0. To put first 3 bits of n at
last, do bitwise or of n<<d with n >>(INT_BITS - d) */
return (n << d) | (n >> (VALUE_LENGTH - d));
}
// Assumes little endian
void printBits(size_t const size, void const* const ptr)
{
unsigned char* b = (unsigned char*)ptr;
unsigned char byte;
int i, j;
for (i = 0; i < size; i++) {
for (j = 7; j >= 0; j--) {
byte = (b[i] >> j) & 1;
printf("%u", byte);
}
}
/*for (i = size - 1; i >= 0; i--) {
for (j = 7; j >= 0; j--) {
byte = (b[i] >> j) & 1;
printf("%u", byte);
}
}*/
puts("");
}
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