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64
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1 /**
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2 * Windows 95 Keygen - 4/23/2022
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3 * By Paper
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4 * a "rewrite" of my C++ app to vanilla C
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5 * truth be told, most of it was C already
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6 *
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7 * skaven is awesome!!
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8 **/
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9 #include <stdio.h>
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10 #include <stdlib.h>
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11 #include <math.h>
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12 #include <time.h>
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13 #include <string.h>
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14 #define CONCAT_INTS(x, y) \
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15 x * pow(10, log10(y)+1) + y;
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16
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17 int get_sum(int n) {
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18 int sum;
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19 for (sum = 0; n > 0; sum += n % 10, n /= 10); // copied this from google. sorry not sorry
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20 return sum;
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21 }
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22
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23 int win95_nt4_prefix() {
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24 int num = rand() % 1000;
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25 while ((num == 333) || (num == 444) || (num == 555) || (num == 666) || (num == 777) || (num == 888) || (num == 999) || ((num % 3) != 0)) {
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26 num = num + 1;
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27 }
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28 return num;
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29 }
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30
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31 int win95_suffix() {
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32 int first_digits, last_digit, second_segment = 5;
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33 while (second_segment % 7 != 0) {
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34 first_digits = rand() % 1000000;
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35 last_digit = rand() % 10;
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36 while ((last_digit == 0) || (last_digit >= 8)) {
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37 last_digit = rand() % 10;
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38 }
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39 second_segment = CONCAT_INTS(first_digits, last_digit);
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40 }
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41 return second_segment;
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42 }
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43
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44 int office_prefix() {
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45 int new_site = rand() % 1000;
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46 int ez_pwned = new_site % 10 + 1;
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47 while (ez_pwned >= 10) {
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48 ez_pwned = ez_pwned - 10;
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49 }
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50 return CONCAT_INTS(new_site, ez_pwned);
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51 }
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52
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53 int oem_prefix() {
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54 int years[] = {
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55 95,
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56 96,
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57 97,
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58 98,
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59 99,
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60 00,
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61 01,
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62 02,
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63 03
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64 };
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65 return CONCAT_INTS(((rand() % 366) + 1), years[rand() % 9]);
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66 }
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67
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68 int oem_middle() {
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69 int first_digits, last_digit, second_segment, sum = 1;
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70 while (sum % 7 != 0) {
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71 sum = 0;
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72 first_digits = rand() % 10000;
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73 last_digit = rand() % 10;
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74 while ((last_digit == 0) || (last_digit >= 8)) {
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75 last_digit = rand() % 10;
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76 }
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77 second_segment = CONCAT_INTS(first_digits, last_digit);
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78 get_sum(second_segment);
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79 }
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80 return second_segment;
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81 }
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82
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83 int main(int argc, char* argv[]) {
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84 srand((unsigned) time(NULL)); // magic rand() stuff :p
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85 if (argc >= 2) {
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86 if (strcmp(argv[1], "--office") == 0) {
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87 printf("%04d-%07d", office_prefix(), win95_suffix());
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88 return 0;
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89 } else if (strcmp(argv[1], "--oem") == 0) {
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90 printf("%05d-OEM-%07d-%05d", oem_prefix(), oem_middle(), (rand() % 100000));
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91 return 0;
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92 } else if (strcmp(argv[1], "--normal") == 0) {
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93 printf("%03d-%07d", win95_nt4_prefix(), win95_suffix());
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94 return 0;
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95 }
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96 }
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97 printf("usage: %s [--normal] [--oem] [--office]", argv[0]);
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98 return 0;
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99 } |
