1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 * SPDX-License-Identifier: curl
22 *
23 ***************************************************************************/
24 #include "curlcheck.h"
25
26 #include "urldata.h"
27 #include "sendf.h"
28
29 /*
30 * This test hardcodes the knowledge of the buffer size which is internal to
31 * Curl_infof(). If that buffer is changed in size, this tests needs to be
32 * updated to still be valid.
33 */
34
35 static struct Curl_easy *testdata;
36
37 static char input[4096];
38 static char output[4096];
39
40 int debugf_cb(CURL *handle, curl_infotype type, char *buf, size_t size,
41 void *userptr);
42
43 /*
44 * This debugf callback is simply dumping the string into the static buffer
45 * for the unit test to inspect. Since we know that we're only dealing with
46 * text we can afford the luxury of skipping the type check here.
47 */
48 int
debugf_cb(CURL * handle,curl_infotype type,char * buf,size_t size,void * userptr)49 debugf_cb(CURL *handle, curl_infotype type, char *buf, size_t size,
50 void *userptr)
51 {
52 (void)handle;
53 (void)type;
54 (void)userptr;
55
56 memset(output, '\0', sizeof(output));
57 memcpy(output, buf, size);
58 return 0;
59 }
60
61 static CURLcode
unit_setup(void)62 unit_setup(void)
63 {
64 CURLcode res = CURLE_OK;
65
66 global_init(CURL_GLOBAL_ALL);
67 testdata = curl_easy_init();
68 if(!testdata) {
69 curl_global_cleanup();
70 return CURLE_OUT_OF_MEMORY;
71 }
72 curl_easy_setopt(testdata, CURLOPT_DEBUGFUNCTION, debugf_cb);
73 curl_easy_setopt(testdata, CURLOPT_VERBOSE, 1L);
74 return res;
75 }
76
77 static void
unit_stop(void)78 unit_stop(void)
79 {
80 curl_easy_cleanup(testdata);
81 curl_global_cleanup();
82 }
83
verify(const char * info,const char * two)84 static int verify(const char *info, const char *two)
85 {
86 /* the 'info' one has a newline appended */
87 char *nl = strchr(info, '\n');
88 if(!nl)
89 return 1; /* nope */
90 return strncmp(info, two, nl - info);
91 }
92
93 UNITTEST_START
94
95 #if defined(__GNUC__) && !defined(__clang__)
96 #pragma GCC diagnostic push
97 #pragma GCC diagnostic ignored "-Wformat"
98 #pragma GCC diagnostic ignored "-Wformat-zero-length"
99 #if __GNUC__ >= 7
100 #pragma GCC diagnostic ignored "-Wformat-overflow"
101 #endif
102 #endif
103
104 /* Injecting a simple short string via a format */
105 msnprintf(input, sizeof(input), "Simple Test");
106 Curl_infof(testdata, "%s", input);
107 fail_unless(verify(output, input) == 0, "Simple string test");
108
109 /* Injecting a few different variables with a format */
110 Curl_infof(testdata, "%s %u testing %lu", input, 42, 43L);
111 fail_unless(verify(output, "Simple Test 42 testing 43\n") == 0,
112 "Format string");
113
114 /* Variations of empty strings */
115 Curl_infof(testdata, "");
116 fail_unless(strlen(output) == 1, "Empty string");
117 Curl_infof(testdata, "%s", (char *)NULL);
118 fail_unless(verify(output, "(nil)") == 0, "Passing NULL as string");
119
120 /* A string just long enough to not be truncated */
121 memset(input, '\0', sizeof(input));
122 memset(input, 'A', 2047);
123 Curl_infof(testdata, "%s", input);
124 fail_unless(strlen(output) == 2048, "No truncation of infof input");
125 fail_unless(verify(output, input) == 0, "No truncation of infof input");
126 fail_unless(output[sizeof(output) - 1] == '\0',
127 "No truncation of infof input");
128
129 /* Just over the limit without newline for truncation via '...' */
130 memset(input + 2047, 'A', 4);
131 Curl_infof(testdata, "%s", input);
132 fail_unless(strlen(output) == 2051, "Truncation of infof input 1");
133 fail_unless(output[sizeof(output) - 1] == '\0', "Truncation of infof input 1");
134
135 /* Just over the limit with newline for truncation via '...' */
136 memset(input + 2047, 'A', 4);
137 memset(input + 2047 + 4, '\n', 1);
138 Curl_infof(testdata, "%s", input);
139 fail_unless(strlen(output) == 2051, "Truncation of infof input 2");
140 fail_unless(output[sizeof(output) - 1] == '\0', "Truncation of infof input 2");
141
142 /* Way over the limit for truncation via '...' */
143 memset(input, '\0', sizeof(input));
144 memset(input, 'A', sizeof(input) - 1);
145 Curl_infof(testdata, "%s", input);
146 fail_unless(strlen(output) == 2051, "Truncation of infof input 3");
147 fail_unless(output[sizeof(output) - 1] == '\0', "Truncation of infof input 3");
148
149 #if defined(__GNUC__) && !defined(__clang__)
150 #pragma GCC diagnostic pop
151 #endif
152
153 UNITTEST_STOP
154
