summaryrefslogtreecommitdiffstats
path: root/nsswitch/libwbclient/wbclient_common.c
blob: f550632b0b960ef866ebd4fdb8e7b0bcad0a7000 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
/*
   Unix SMB/CIFS implementation.

   Winbind client API

   Copyright (C) Gerald (Jerry) Carter 2007


   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 3 of the License, or (at your option) any later version.

   This library 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
   Library General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

/* Required Headers */

#include "replace.h"
#include "libwbclient.h"

/** @brief Translate an error value into a string
 *
 * @param error
 *
 * @return a pointer to a static string
 **/
const char *wbcErrorString(wbcErr error)
{
	switch (error) {
	case WBC_ERR_SUCCESS:
		return "WBC_ERR_SUCCESS";
	case WBC_ERR_NOT_IMPLEMENTED:
		return "WBC_ERR_NOT_IMPLEMENTED";
	case WBC_ERR_UNKNOWN_FAILURE:
		return "WBC_ERR_UNKNOWN_FAILURE";
	case WBC_ERR_NO_MEMORY:
		return "WBC_ERR_NO_MEMORY";
	case WBC_ERR_INVALID_SID:
		return "WBC_ERR_INVALID_SID";
	case WBC_ERR_INVALID_PARAM:
		return "WBC_ERR_INVALID_PARAM";
	case WBC_ERR_WINBIND_NOT_AVAILABLE:
		return "WBC_ERR_WINBIND_NOT_AVAILABLE";
	case WBC_ERR_DOMAIN_NOT_FOUND:
		return "WBC_ERR_DOMAIN_NOT_FOUND";
	case WBC_ERR_INVALID_RESPONSE:
		return "WBC_ERR_INVALID_RESPONSE";
	case WBC_ERR_NSS_ERROR:
		return "WBC_ERR_NSS_ERROR";
	case WBC_ERR_UNKNOWN_USER:
		return "WBC_ERR_UNKNOWN_USER";
	case WBC_ERR_UNKNOWN_GROUP:
		return "WBC_ERR_UNKNOWN_GROUP";
	case WBC_ERR_AUTH_ERROR:
		return "WBC_ERR_AUTH_ERROR";
	case WBC_ERR_PWD_CHANGE_FAILED:
		return "WBC_ERR_PWD_CHANGE_FAILED";
	}

	return "unknown wbcErr value";
}

#define WBC_MAGIC (0x7a2b0e1e)
#define WBC_MAGIC_FREE (0x875634fe)

struct wbcMemPrefix {
	uint32_t magic;
	void (*destructor)(void *ptr);
};

static size_t wbcPrefixLen(void)
{
	size_t result = sizeof(struct wbcMemPrefix);
	return (result + 15) & ~15;
}

static struct wbcMemPrefix *wbcMemToPrefix(void *ptr)
{
	return (struct wbcMemPrefix *)(((char *)ptr) - wbcPrefixLen());
}

void *wbcAllocateMemory(size_t nelem, size_t elsize,
			void (*destructor)(void *ptr))
{
	struct wbcMemPrefix *result;

	if (nelem >= (2<<24)/elsize) {
		/* basic protection against integer wrap */
		return NULL;
	}

	result = (struct wbcMemPrefix *)calloc(
		1, nelem*elsize + wbcPrefixLen());
	if (result == NULL) {
		return NULL;
	}
	result->magic = WBC_MAGIC;
	result->destructor = destructor;
	return ((char *)result) + wbcPrefixLen();
}

/* Free library allocated memory */
void wbcFreeMemory(void *p)
{
	struct wbcMemPrefix *wbcMem;

	if (p == NULL) {
		return;
	}
	wbcMem = wbcMemToPrefix(p);
	if (wbcMem->magic != WBC_MAGIC) {
		return;
	}

	/* paranoid check to ensure we don't double free */
	wbcMem->magic = WBC_MAGIC_FREE;

	if (wbcMem->destructor != NULL) {
		wbcMem->destructor(p);
	}
	free(wbcMem);
	return;
}

char *wbcStrDup(const char *str)
{
	char *result;
	size_t len;

	len = strlen(str);
	result = (char *)wbcAllocateMemory(len+1, sizeof(char), NULL);
	if (result == NULL) {
		return NULL;
	}
	memcpy(result, str, len+1);
	return result;
}

static void wbcStringArrayDestructor(void *ptr)
{
	char **p = (char **)ptr;
	while (*p != NULL) {
		free(*p);
		p += 1;
	}
}

const char **wbcAllocateStringArray(int num_strings)
{
	return (const char **)wbcAllocateMemory(
		num_strings + 1, sizeof(const char *),
		wbcStringArrayDestructor);
}

wbcErr wbcLibraryDetails(struct wbcLibraryDetails **_details)
{
	struct wbcLibraryDetails *info;

	info = (struct wbcLibraryDetails *)wbcAllocateMemory(
		1, sizeof(struct wbcLibraryDetails), NULL);

	if (info == NULL) {
		return WBC_ERR_NO_MEMORY;
	}

	info->major_version = WBCLIENT_MAJOR_VERSION;
	info->minor_version = WBCLIENT_MINOR_VERSION;
	info->vendor_version = WBCLIENT_VENDOR_VERSION;

	*_details = info;
	return WBC_ERR_SUCCESS;
}