Attachment 1472801 Details for Bug 1611784 – Reproducer

Reproducer

salt.c (text/plain), 1.34 KB, created by Jesse Haber-Kucharsky on 2018-08-02 17:52:21 UTC

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Creator: Jesse Haber-Kucharsky

Created: 2018-08-02 17:52:21 UTC

Size: 1.34 KB

patch

obsolete

>#include <stdbool.h>
>#include <errno.h>
>#include <stdlib.h>
>#include <string.h>
>#include <stdio.h>
>
>#include <crypt.h>
>
>struct crypt_data* get_crypt_state(void) {
>     static _Thread_local struct crypt_data* instance = NULL;
>
>     if (instance) {
>          return instance;
>     }
>
>     instance = malloc(sizeof(struct crypt_data));
>     instance->initialized = 0;
>     return instance;
>}
>
>#define NUM_ALGORITHMS 4
>
>static char* const algorithms[] = {
>     "$2y$", // bcrypt
>     "$2a$",  // bcrypt
>     "$5$", // SHA-256
>     "$6$", // SHA-512
>};
>
>char* generate_random_salt(char* const algorithm) {
>     // 16 bytes for the random part plus the algorithm, plus some extra.
>     static _Thread_local char buffer[16 + 8];
>     buffer[0] = '\0';
>     // "Random".
>     char const* random_part = "aaaabbbbccccdddd$";
>     strcat(buffer, algorithm);
>     return strcat(buffer, random_part);
>}
>
>int main(void) {
>     char* const cleartext = "super_secret";
>
>     for (int i = 0; i < NUM_ALGORITHMS; ++i) {
>          char* const salt = generate_random_salt(algorithms[i]);
>          char* const e = crypt_r(cleartext, salt, get_crypt_state());
>
>          if (!e || (e[0] == '*')) {
>               printf("%5s: Failed with `%s`\n", algorithms[i], strerror(errno));
>          } else {
>               printf("%5s: Got `%s`\n", algorithms[i], e);
>          }
>     }
>
>     return 0;
>}

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Attachments on bug 1611784: 1472801