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increased number range, now using 64bit

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devel_freefall
Jonas Arnold 3 years ago
parent 3c686ed771
commit f3d104409c
1 changed files with 9 additions and 139 deletions
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  1. 148
      ASYD_Cryptograhpy/SW03-DHKE/main.c

148
ASYD_Cryptograhpy/SW03-DHKE/main.c
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@ -8,7 +8,7 @@
* \author Basil Estermann, basil.estermann@stud.hslu.ch
* Simon Frei, simon.frei@stud.hslu.ch
* Jonas Arnold, jonas.arnold@stud.hslu.ch
* \date 09.03.2023
* \date 10.03.2023
*
*--------------------------------------------------------------------
*/
@ -21,23 +21,21 @@
#include "DHKE.h"
#define KEY_LENGTH 32
/* filenames as of this code:
*/
#define KEY_LENGTH 64
void main(void) {
/* Initialize variables */
// P has to be a prime number!
// P has to be a prime number! Large prime number (64bit): 3203431780337000
t_encryptionArithmetic P;
encryptionArithmetic_Init(&P, KEY_LENGTH);
if (encryptionArithmetic_stringToHex("99497", P.number, KEY_LENGTH) == false) {
if (encryptionArithmetic_stringToHex("3203431780337000", P.number, KEY_LENGTH) == false) {
printf("ERROR: Creating P.");
return 1000000;
}
// alpha not required for session key generation
//t_encryptionArithmetic alpha;
//encryptionArithmetic_Init(&alpha, KEY_LENGTH);
//if (encryptionArithmetic_stringToHex("13", alpha.number, KEY_LENGTH) == false) {
@ -47,14 +45,14 @@ void main(void) {
t_encryptionArithmetic pub;
encryptionArithmetic_Init(&pub, KEY_LENGTH);
if (encryptionArithmetic_stringToHex("1100", pub.number, KEY_LENGTH) == false) {
if (encryptionArithmetic_stringToHex("1370122177720875", pub.number, KEY_LENGTH) == false) {
printf("ERROR: Creating pub.");
return 1000002;
}
t_encryptionArithmetic priv;
encryptionArithmetic_Init(&priv, KEY_LENGTH);
if (encryptionArithmetic_stringToHex("2100", priv.number, KEY_LENGTH) == false) {
if (encryptionArithmetic_stringToHex("9778729279583412", priv.number, KEY_LENGTH) == false) {
printf("ERROR: Creating priv.");
return 1000003;
}
@ -72,132 +70,4 @@ void main(void) {
return 0;
}
//void encrypt(uint32_t key[4], uint8_t numberOfCycles) {
//
// /* duplicate code that hasn't been moved to a separate function for readability reasons */
// /* -------------------------------------------------------------------- */
//
// /* variables */
// uint32_t amountOfCharsInFile = 0;
// /* https://www.programiz.com/c-programming/c-file-input-output */
// FILE* fileHandle = fopen("plaintext.txt", "r");
// if (fileHandle == NULL) {
// return;
// }
//
// /* get total number of characters in file to encrypt */
// while (getc(fileHandle) != EOF) {
// amountOfCharsInFile++;
// }
//
// /* allocate enough memory for the whole file to be read */
// char* inputText = (char*)calloc(amountOfCharsInFile + 8, sizeof(char)); /* add 8 for extra padding in case the file contains some sort of rest in regards to amountOfCharsInFile % 8 */
// if (inputText == NULL) {
// return;
// }
//
// /* close and reopen file to start at the beginning of the file again */
// fclose(fileHandle);
// fileHandle = fopen("plaintext.txt", "r");
// if (fileHandle == NULL) {
// return;
// }
//
// /* read the whole file into memory */
// for (uint32_t i = 0; i < amountOfCharsInFile; i++) {
// inputText[i] = getc(fileHandle);
// }
// fclose(fileHandle);
// /* -------------------------------------------------------------------- */
//
// /* loop through the whole array to encrypt the whole message
// This happens two blocks of 32bit (= 8 characters) at a time
// Hence the increase of "i" by 8
// */
// for (uint32_t i = 0; i < amountOfCharsInFile; i += 8) { /* + 8 to compensate for the requested element size of the encipher function (32 bit) */
// /* dereferencing and forwarding the address of the key ensures,
// * that we don't ready from a random address in memory. Rookie mistakes happen :) */
// encipher_CBC(numberOfCycles, &(inputText[i]), &(*key));
// }
//
// /* generate new file where encryption is stored */
// fileHandle = fopen("encrypted.cip", "w");
// if (fileHandle == NULL) {
// return;
// }
// /* fill new file with content */
// /* to get the extra character padding we might unintentionally drop
// * we need to read up to a multiple of 8 (32 bit)
// */
// for (uint32_t i = 0; i < (amountOfCharsInFile + (8-(amountOfCharsInFile%8))); i++) {
// putc(inputText[i], fileHandle);
// }
// fclose(fileHandle);
// free(inputText);
//}
//
//void decrypt(uint32_t key[4], uint8_t numberOfCycles) {
//
// /* duplicate code that hasn't been moved to a separate function for readability reasons */
// /* -------------------------------------------------------------------- */
//
// /* variables */
// uint32_t amountOfCharsInFile = 0;
//
// /* https://www.programiz.com/c-programming/c-file-input-output */
// FILE* fileHandle = fopen("encrypted.cip", "r");
// if (fileHandle == NULL) {
// return;
// }
//
// /* get total number of characters in file to decrypt */
// while (getc(fileHandle) != EOF) {
// amountOfCharsInFile++;
// }
//
// /* allocate memory for the whole file to be read */
// char* inputText = (char*)calloc(amountOfCharsInFile + 10, sizeof(char)); /* add 10 for extra padding */
// if (inputText == NULL) {
// return;
// }
//
// /* close and reopen file to start at the beginning of the file again */
// fclose(fileHandle);
// fileHandle = fopen("encrypted.cip", "r");
// if (fileHandle == NULL) {
// return;
// }
//
// /* read the whole file into memory */
// for (uint32_t i = 0; i < amountOfCharsInFile; i++) {
// inputText[i] = getc(fileHandle);
// }
// fclose(fileHandle);
//
// /* -------------------------------------------------------------------- */
//
// /* loop through the whole array to encrypt the whole message
// This happens two blocks of 32bit (= 4 characters) at a time
// Hence the increase of "i" by 8
// */
//
// for (uint32_t i = 0; i < amountOfCharsInFile; i += 8) { /* i += 8*/
// /* dereferencing and forwarding the address of the key ensures,
// * that we don't ready from a random address in memory. Rookie mistakes happen :) */
// decipher_CBC(numberOfCycles, &(inputText[i]), &(*key));
// }
//
// /* generate new file where the decryption is stored */
// fileHandle = fopen("decrypted.txt", "w");
// if (fileHandle == NULL) {
// return;
// }
// /* fill new file with content */
// for (uint32_t i = 0; i < amountOfCharsInFile; i++) {
// putc(inputText[i], fileHandle);
// }
// fclose(fileHandle);
// free(inputText);
//}
}
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