1  /*
       2   * Check decoding of add_key syscall.
       3   *
       4   * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
       5   * Copyright (c) 2016-2021 The strace developers.
       6   * All rights reserved.
       7   *
       8   * SPDX-License-Identifier: GPL-2.0-or-later
       9   */
      10  
      11  #include "tests.h"
      12  #include "scno.h"
      13  
      14  #include <inttypes.h>
      15  #include <stdio.h>
      16  #include <unistd.h>
      17  
      18  static void
      19  print_val_str(const void *ptr, const char *str)
      20  {
      21  	if (str)
      22  		printf("%s, ", str);
      23  	else
      24  		printf("%p, ", ptr);
      25  }
      26  
      27  static void
      28  do_add_key(const char *type, const char *type_str, const char *desc,
      29  	const char *desc_str, const char *payload, const char *payload_str,
      30  	size_t plen, int32_t keyring, const char *keyring_str)
      31  {
      32  	long rc = syscall(__NR_add_key, type, desc, payload, plen, keyring);
      33  	const char *errstr = sprintrc(rc);
      34  	printf("add_key(");
      35  	print_val_str(type, type_str);
      36  	print_val_str(desc, desc_str);
      37  	print_val_str(payload, payload_str);
      38  	printf("%zu, ", plen);
      39  	if (keyring_str)
      40  		printf("%s", keyring_str);
      41  	else
      42  		printf("%d", keyring);
      43  	printf(") = %s\n", errstr);
      44  }
      45  
      46  int
      47  main(void)
      48  {
      49  	static const char unterminated1[] = { '\1', '\2', '\3', '\4', '\5' };
      50  	static const char unterminated2[] = { '\6', '\7', '\10', '\11', '\12' };
      51  	static const char unterminated3[] = { '\16', '\17', '\20', '\21', '\22' };
      52  
      53  	char *bogus_type = tail_memdup(unterminated1, sizeof(unterminated1));
      54  	char *bogus_desc = tail_memdup(unterminated2, sizeof(unterminated2));
      55  	char *bogus_payload = tail_memdup(unterminated3, sizeof(unterminated3));
      56  
      57  	struct {
      58  		const char *type;
      59  		const char *str;
      60  	} types[] = {
      61  		{ ARG_STR(NULL) },
      62  		{ bogus_type + sizeof(unterminated1), NULL },
      63  		{ bogus_type, NULL },
      64  		{ ARG_STR("\20\21\22\23\24") },
      65  		{ ARG_STR("user") },
      66  	};
      67  
      68  	struct {
      69  		const char *desc;
      70  		const char *str;
      71  	} descs[] = {
      72  		{ ARG_STR(NULL) },
      73  		{ bogus_desc + sizeof(unterminated2), NULL },
      74  		{ bogus_desc, NULL },
      75  		{ ARG_STR("\25\26\27\30\31") },
      76  		{ ARG_STR("desc") },
      77  		{ "overly long description", STRINGIFY("overly long ") "..." },
      78  	};
      79  
      80  	struct {
      81  		const char *pload;
      82  		const char *str;
      83  		size_t plen;
      84  	} payloads[] = {
      85  		{ ARG_STR(NULL), 0 },
      86  		{ bogus_payload + sizeof(unterminated3), NULL,
      87  			(size_t) 0xdeadbeefbadc0dedULL },
      88  		{ bogus_payload, STRINGIFY(""), 0 },
      89  		{ bogus_payload, STRINGIFY("\16\17\20\21\22"), 5 },
      90  		{ bogus_payload, NULL, 10 },
      91  		{ "overly long payload", STRINGIFY("overly long ") "...", 15 },
      92  	};
      93  
      94  	struct {
      95  		uint32_t keyring;
      96  		const char *str;
      97  	} keyrings[] = {
      98  		{ ARG_STR(0) },
      99  		{ ARG_STR(1234567890) },
     100  		{ ARG_STR(-1234567890) },
     101  		{ -1, "KEY_SPEC_THREAD_KEYRING" },
     102  	};
     103  
     104  	for (unsigned int i = 0;
     105  	     i < ARRAY_SIZE(types); ++i)
     106  		for (unsigned int j = 0;
     107  		     j < ARRAY_SIZE(descs); ++j)
     108  			for (unsigned int k = 0;
     109  			     k < ARRAY_SIZE(payloads); ++k)
     110  				for (unsigned int l = 0;
     111  				     l < ARRAY_SIZE(keyrings); ++l)
     112  					do_add_key(types[i].type, types[i].str,
     113  						descs[j].desc, descs[j].str,
     114  						payloads[k].pload,
     115  						payloads[k].str,
     116  						payloads[k].plen,
     117  						keyrings[l].keyring,
     118  						keyrings[l].str);
     119  
     120  	puts("+++ exited with 0 +++");
     121  
     122  	return 0;
     123  }