105 lines
4.0 KiB
C
105 lines
4.0 KiB
C
#include <openssl/md5.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdbool.h>
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#include <stdlib.h>
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int main(int argc, char* argv[]){
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printf("\nWEST");
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const char *input_string = "yzbqklnj";
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unsigned char output_digest[MD5_DIGEST_LENGTH];
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unsigned long long int iteration_number = 0;
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unsigned long long int suffix = 0;
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unsigned long long int count;
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unsigned char output_digest_hex[MD5_DIGEST_LENGTH * 2 + 1];
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bool initialisation = false;
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//creating empty md5 context
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MD5_CTX context;
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const char *zeroes = "000000";
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if(argc == 1){
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//comparing first 5 digits of output
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while (strncmp(output_digest_hex, zeroes, 5) !=0){
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printf("%s\n",output_digest_hex);
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printf("loop %llu\n", iteration_number);
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if(initialisation == false && iteration_number == 0){
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MD5((const unsigned char*)input_string,strlen(input_string),output_digest);
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iteration_number++;
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for(int i = 0; i< MD5_DIGEST_LENGTH; i++){
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sprintf(&output_digest_hex[i * 2], "%02x", output_digest[i]);
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}
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output_digest_hex[32] = '\0';
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initialisation = true;
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}else if(iteration_number >= 1){
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suffix = iteration_number;
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count = snprintf(NULL, 0, "%llu", suffix);
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char *suffix_string = malloc(count +1);
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sprintf(suffix_string,"%llu",suffix);
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char *loop_input_string = calloc(1,8 + count + 1);
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strcat(loop_input_string,input_string);
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strcat(loop_input_string,suffix_string);
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MD5((const unsigned char*)loop_input_string,strlen(loop_input_string),output_digest);
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iteration_number++;
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for(int i = 0; i< MD5_DIGEST_LENGTH; i++){
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sprintf(&output_digest_hex[i * 2], "%02x", output_digest[i]);
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}
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output_digest_hex[32] = '\0';
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printf("\n%s\n",loop_input_string);
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free(suffix_string);
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free(loop_input_string);
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} else {
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//ERROR!
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return 1;
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}
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}} else {
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while (strncmp(output_digest_hex, zeroes, 6) !=0){//Part 2 is to find the suffix which gives 6 leading zeroes on the output
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printf("%s\n",output_digest_hex);
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printf("loop %llu\n", iteration_number);
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if(initialisation == false && iteration_number == 0){
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MD5((const unsigned char*)input_string,strlen(input_string),output_digest);
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iteration_number++;
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for(int i = 0; i< MD5_DIGEST_LENGTH; i++){
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sprintf(&output_digest_hex[i * 2], "%02x", output_digest[i]);
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}
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output_digest_hex[32] = '\0';
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initialisation = true;
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}else if(iteration_number >= 1){
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suffix = iteration_number;
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count = snprintf(NULL, 0, "%llu", suffix);
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char *suffix_string = malloc(count +1);
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sprintf(suffix_string,"%llu",suffix);
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char *loop_input_string = calloc(1,8 + count + 1);
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strcat(loop_input_string,input_string);
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strcat(loop_input_string,suffix_string);
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MD5((const unsigned char*)loop_input_string,strlen(loop_input_string),output_digest);
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iteration_number++;
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for(int i = 0; i< MD5_DIGEST_LENGTH; i++){
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sprintf(&output_digest_hex[i * 2], "%02x", output_digest[i]);
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}
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output_digest_hex[32] = '\0';
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printf("\n%s\n",loop_input_string);
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free(suffix_string);
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free(loop_input_string);
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} else {
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//ERROR!
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return 1;
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}
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}
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}
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printf("%s%llu\n", input_string,iteration_number -1);
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printf("%s\n", output_digest_hex);
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}
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//input = yzbqklnj
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