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      1 /*
      2  * Check decoding of add_key syscall.
      3  *
      4  * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr (at) gmail.com>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. The name of the author may not be used to endorse or promote products
     16  *    derived from this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 
     30 #include "tests.h"
     31 #include <asm/unistd.h>
     32 #include "scno.h"
     33 
     34 #ifdef __NR_add_key
     35 
     36 # include <inttypes.h>
     37 # include <stdio.h>
     38 # include <unistd.h>
     39 
     40 void
     41 print_val_str(const void *ptr, const char *str)
     42 {
     43 	if (str)
     44 		printf("%s, ", str);
     45 	else
     46 		printf("%p, ", ptr);
     47 }
     48 
     49 void
     50 do_add_key(const char *type, const char *type_str, const char *desc,
     51 	const char *desc_str, const char *payload, const char *payload_str,
     52 	size_t plen, int32_t keyring, const char *keyring_str)
     53 {
     54 	long rc = syscall(__NR_add_key, type, desc, payload, plen, keyring);
     55 	const char *errstr = sprintrc(rc);
     56 	printf("add_key(");
     57 	print_val_str(type, type_str);
     58 	print_val_str(desc, desc_str);
     59 	print_val_str(payload, payload_str);
     60 	printf("%zu, ", plen);
     61 	if (keyring_str)
     62 		printf("%s", keyring_str);
     63 	else
     64 		printf("%d", keyring);
     65 	printf(") = %s\n", errstr);
     66 }
     67 
     68 int
     69 main(void)
     70 {
     71 	static const char unterminated1[] = { '\1', '\2', '\3', '\4', '\5' };
     72 	static const char unterminated2[] = { '\6', '\7', '\10', '\11', '\12' };
     73 	static const char unterminated3[] = { '\16', '\17', '\20', '\21', '\22' };
     74 
     75 	char *bogus_type = tail_memdup(unterminated1, sizeof(unterminated1));
     76 	char *bogus_desc = tail_memdup(unterminated2, sizeof(unterminated2));
     77 	char *bogus_payload = tail_memdup(unterminated3, sizeof(unterminated3));
     78 
     79 	unsigned i;
     80 	unsigned j;
     81 	unsigned k;
     82 	unsigned l;
     83 
     84 	struct {
     85 		const char *type;
     86 		const char *str;
     87 	} types[] = {
     88 		{ ARG_STR(NULL) },
     89 		{ bogus_type + sizeof(unterminated1), NULL },
     90 		{ bogus_type, NULL },
     91 		{ ARG_STR("\20\21\22\23\24") },
     92 		{ ARG_STR("user") },
     93 	};
     94 
     95 	struct {
     96 		const char *desc;
     97 		const char *str;
     98 	} descs[] = {
     99 		{ ARG_STR(NULL) },
    100 		{ bogus_desc + sizeof(unterminated2), NULL },
    101 		{ bogus_desc, NULL },
    102 		{ ARG_STR("\25\26\27\30\31") },
    103 		{ ARG_STR("desc") },
    104 		{ "overly long description", _STR("overly long ") "..." },
    105 	};
    106 
    107 	struct {
    108 		const char *pload;
    109 		const char *str;
    110 		size_t plen;
    111 	} payloads[] = {
    112 		{ ARG_STR(NULL), 0 },
    113 		{ bogus_payload + sizeof(unterminated3), NULL,
    114 			(size_t) 0xdeadbeefbadc0dedULL },
    115 		{ bogus_payload, _STR(""), 0 },
    116 		{ bogus_payload, _STR("\16\17\20\21\22"), 5 },
    117 		{ bogus_payload, NULL, 10 },
    118 		{ "overly long payload", _STR("overly long ") "...", 15 },
    119 	};
    120 
    121 	struct {
    122 		uint32_t keyring;
    123 		const char *str;
    124 	} keyrings[] = {
    125 		{ ARG_STR(0) },
    126 		{ ARG_STR(1234567890) },
    127 		{ ARG_STR(-1234567890) },
    128 		{ -1, "KEY_SPEC_THREAD_KEYRING" },
    129 	};
    130 
    131 	for (i = 0; i < ARRAY_SIZE(types); i++)
    132 		for (j = 0; j < ARRAY_SIZE(descs); j++)
    133 			for (k = 0; k < ARRAY_SIZE(payloads); k++)
    134 				for (l = 0; l < ARRAY_SIZE(keyrings); l++)
    135 					do_add_key(types[i].type, types[i].str,
    136 						descs[j].desc, descs[j].str,
    137 						payloads[k].pload,
    138 						payloads[k].str,
    139 						payloads[k].plen,
    140 						keyrings[l].keyring,
    141 						keyrings[l].str);
    142 
    143 	puts("+++ exited with 0 +++");
    144 
    145 	return 0;
    146 }
    147 
    148 #else
    149 
    150 SKIP_MAIN_UNDEFINED("__NR_add_key");
    151 
    152 #endif
    153