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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
/* Copyright (c) 2017-2018 Dovecot authors, see the included COPYING file */
#include "auth-common.h"
#include "passdb.h"
#include "auth-cache.h"
#if defined(BUILTIN_LUA) || defined(PLUGIN_BUILD)
#include "db-lua.h"
struct dlua_passdb_module {
struct passdb_module module;
struct dlua_script *script;
const char *file;
bool has_password_verify;
};
static enum passdb_result
passdb_lua_verify_password(struct dlua_passdb_module *module,
struct auth_request *request, const char *password)
{
const char *error = NULL;
enum passdb_result result =
auth_lua_call_password_verify(module->script, request,
password, &error);
if (result == PASSDB_RESULT_PASSWORD_MISMATCH) {
auth_request_log_password_mismatch(request, AUTH_SUBSYS_DB);
} else if (result == PASSDB_RESULT_INTERNAL_FAILURE && error != NULL) {
e_error(authdb_event(request), "passdb-lua: %s",
error);
}
return result;
}
static enum passdb_result
passdb_lua_lookup(struct auth_request *request,
const char **scheme_r, const char **password_r)
{
const char *error = NULL;
enum passdb_result result;
struct dlua_passdb_module *module =
(struct dlua_passdb_module *)request->passdb->passdb;
*scheme_r = *password_r = NULL;
result = auth_lua_call_passdb_lookup(module->script, request, scheme_r,
password_r, &error);
if (result == PASSDB_RESULT_INTERNAL_FAILURE && error != NULL) {
e_error(authdb_event(request), "db-lua: %s", error);
} else if (result != PASSDB_RESULT_OK) {
/* skip next bit */
} else if (!auth_fields_exists(request->fields.extra_fields, "nopassword")) {
if (*password_r == NULL || **password_r == '\0') {
result = auth_request_password_missing(request);
} else {
if (*scheme_r == NULL)
*scheme_r = request->passdb->passdb->default_pass_scheme;
auth_request_set_field(request, "password",
*password_r, *scheme_r);
}
} else if (*password_r != NULL && **password_r != '\0') {
e_info(authdb_event(request),
"nopassword given and password is not empty");
result = PASSDB_RESULT_PASSWORD_MISMATCH;
}
return result;
}
static void
passdb_lua_lookup_credentials(struct auth_request *request,
lookup_credentials_callback_t *callback)
{
const char *lua_password, *lua_scheme;
enum passdb_result result =
passdb_lua_lookup(request, &lua_scheme, &lua_password);
passdb_handle_credentials(result, lua_password, lua_scheme, callback, request);
}
static void
passdb_lua_verify_plain(struct auth_request *request, const char *password,
verify_plain_callback_t *callback)
{
struct dlua_passdb_module *module =
(struct dlua_passdb_module *)request->passdb->passdb;
const char *lua_password, *lua_scheme;
enum passdb_result result;
if (module->has_password_verify) {
result = passdb_lua_verify_password(module, request, password);
} else {
result = passdb_lua_lookup(request, &lua_scheme, &lua_password);
if (result == PASSDB_RESULT_OK) {
if (lua_scheme == NULL)
lua_scheme = "PLAIN";
if ((auth_request_password_verify(request, password, lua_password,
lua_scheme, AUTH_SUBSYS_DB)) <=0) {
result = PASSDB_RESULT_PASSWORD_MISMATCH;
}
}
}
callback(result, request);
}
static struct passdb_module *
passdb_lua_preinit(pool_t pool, const char *args)
{
const char *cache_key = "%u";
const char *scheme = "PLAIN";
struct dlua_passdb_module *module;
bool blocking = TRUE;
module = p_new(pool, struct dlua_passdb_module, 1);
const char *const *fields = t_strsplit_spaces(args, " ");
while(*fields != NULL) {
if (str_begins(*fields, "file=")) {
module->file = p_strdup(pool, (*fields)+5);
} else if (str_begins(*fields, "blocking=")) {
const char *value = (*fields)+9;
if (strcmp(value, "yes") == 0) {
blocking = TRUE;
} else if (strcmp(value, "no") == 0) {
blocking = FALSE;
} else {
i_fatal("Invalid value %s. "
"Field blocking must be yes or no",
value);
}
} else if (str_begins(*fields, "cache_key=")) {
if (*((*fields)+10) != '\0')
cache_key = (*fields)+10;
else /* explicitly disable auth caching for lua */
cache_key = NULL;
} else if (str_begins(*fields, "scheme=")) {
scheme = p_strdup(pool, (*fields)+7);
} else {
i_fatal("Unsupported parameter %s", *fields);
}
fields++;
}
if (module->file == NULL)
i_fatal("passdb-lua: Missing mandatory file= parameter");
module->module.blocking = blocking;
module->module.default_cache_key =
auth_cache_parse_key(pool, cache_key);
module->module.default_pass_scheme = scheme;
return &module->module;
}
static void passdb_lua_init(struct passdb_module *_module)
{
struct dlua_passdb_module *module =
(struct dlua_passdb_module *)_module;
const char *error;
if (dlua_script_create_file(module->file, &module->script, auth_event, &error) < 0 ||
auth_lua_script_init(module->script, &error) < 0)
i_fatal("passdb-lua: initialization failed: %s", error);
module->has_password_verify =
dlua_script_has_function(module->script, AUTH_LUA_PASSWORD_VERIFY);
}
static void passdb_lua_deinit(struct passdb_module *_module)
{
struct dlua_passdb_module *module =
(struct dlua_passdb_module *)_module;
dlua_script_unref(&module->script);
}
#ifndef PLUGIN_BUILD
struct passdb_module_interface passdb_lua =
#else
struct passdb_module_interface passdb_lua_plugin =
#endif
{
"lua",
passdb_lua_preinit,
passdb_lua_init,
passdb_lua_deinit,
passdb_lua_verify_plain,
passdb_lua_lookup_credentials,
NULL
};
#else
struct passdb_module_interface passdb_lua = {
.name = "lua"
};
#endif
|
