kc3-lang/gnulib/tests/test-sha3-256-buffer.c

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• Hash : a82f1b76
  Author :
  Date : 2025-09-06T16:38:08
  

  crypto/sha3-buffer, crypto/sha3: Protect against double frees (regr. today).
  
  * lib/sha3.c (sha3_free_ctx): Only free the EVP_MD_CTX if it is not
  NULL, and set it to NULL after freeing.
  (DEFINE_SHA3_INIT_CTX, sha3_finish_ctx, sha3_process_bytes): Leave
  freeing memory to the caller.
  * lib/sha3-stream.c (sha3_xxx_stream): Call sha3_free_ctx on success and
  if sha3_init_ctx fails.
  * tests/test-sha3-224-buffer.c (main): Add a test that would otherwise
  segfault without this patch.
  * tests/test-sha3-256-buffer.c (main): Likewise.
  * tests/test-sha3-384-buffer.c (main): Likewise.
  * tests/test-sha3-512-buffer.c (main): Likewise.
  

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• tests/test-sha3-256-buffer.c

• /* Test of the sha3_256_buffer() function.
     Copyright (C) 2025 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation, either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  
  /* Written by Collin Funk <collin.funk1@gmail.com>, 2025.  */
  
  #include <config.h>
  
  /* Specification.  */
  #include "sha3.h"
  
  #include <stdio.h>
  #include <string.h>
  #include <stdlib.h>
  
  struct test_case {
    char const *message;
    char const *digest;
  };
  
  static const struct test_case test_cases[] = {
    { "", "\xa7\xff\xc6\xf8\xbf\x1e\xd7\x66\x51\xc1\x47\x56\xa0\x61\xd6\x62\xf5"
          "\x80\xff\x4d\xe4\x3b\x49\xfa\x82\xd8\x0a\x4b\x80\xf8\x43\x4a" },
    { "abc",
      "\x3a\x98\x5d\xa7\x4f\xe2\x25\xb2\x04\x5c\x17\x2d\x6b\xd3\x90\xbd\x85\x5f"
      "\x08\x6e\x3e\x9d\x52\x5b\x46\xbf\xe2\x45\x11\x43\x15\x32" },
    { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
      "\x41\xc0\xdb\xa2\xa9\xd6\x24\x08\x49\x10\x03\x76\xa8\x23\x5e\x2c\x82\xe1"
      "\xb9\x99\x8a\x99\x9e\x21\xdb\x32\xdd\x97\x49\x6d\x33\x76" },
    { "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopj"
      "klmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",
      "\x91\x6f\x60\x61\xfe\x87\x97\x41\xca\x64\x69\xb4\x39\x71\xdf\xdb\x28\xb1"
      "\xa3\x2d\xc3\x6c\xb3\x25\x4e\x81\x2b\xe2\x7a\xad\x1d\x18" },
  };
  
  static int
  check (char const *message, size_t len, char const *expect)
  {
    char buf[SHA3_256_DIGEST_SIZE];
    if (memcmp (sha3_256_buffer (message, len, buf),
                expect, SHA3_256_DIGEST_SIZE) != 0)
      {
        size_t i;
        printf ("expected:\n");
        for (i = 0; i < SHA3_256_DIGEST_SIZE; i++)
          printf ("%02x ", expect[i] & 0xFFu);
        printf ("\ncomputed:\n");
        for (i = 0; i < SHA3_256_DIGEST_SIZE; i++)
          printf ("%02x ", buf[i] & 0xFFu);
        printf ("\n");
        return 1;
      }
    return 0;
  }
  
  int
  main (void)
  {
    /* Check the test vectors.  */
    for (size_t i = 0; i < sizeof test_cases / sizeof *test_cases; ++i)
      {
        char const *message = test_cases[i].message;
        char const *digest = test_cases[i].digest;
        if (check (message, strlen (message), digest) != 0)
          return 1;
      }
  
    /* Check that a large buffer works.  */
    char *large = malloc (1000000);
    if (large != NULL)
      {
        memset (large, 'a', 1000000);
        char const *expect = ("\x5c\x88\x75\xae\x47\x4a\x36\x34\xba\x4f\xd5\x5e"
                              "\xc8\x5b\xff\xd6\x61\xf3\x2a\xca\x75\xc6\xd6\x99"
                              "\xd0\xcd\xcb\x6c\x11\x58\x91\xc1");
        if (check (large, 1000000, expect) != 0)
          return 1;
        free (large);
      }
  
    /* Check that sha3_free_ctx can be called multiple times without
       crashing.  */
    {
      struct sha3_ctx ctx;
      if (sha3_256_init_ctx (&ctx))
        {
          sha3_free_ctx (&ctx);
          sha3_free_ctx (&ctx);
        }
    }
  
    return 0;
  }
  

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