summaryrefslogtreecommitdiffstats
path: root/src/util/authtok.c
blob: 1c54d04cceece494c2eb6fe2244f3d03d20ce017 (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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
/*
   SSSD - auth utils

   Copyright (C) Simo Sorce <simo@redhat.com> 2012

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

   This program 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 General Public License for more details.

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

#include "authtok.h"

enum sss_authtok_type sss_authtok_get_type(struct sss_auth_token *tok)
{
    return tok->type;
}

size_t sss_authtok_get_size(struct sss_auth_token *tok)
{
    switch (tok->type) {
    case SSS_AUTHTOK_TYPE_PASSWORD:
    case SSS_AUTHTOK_TYPE_CCFILE:
        return tok->length;
    case SSS_AUTHTOK_TYPE_EMPTY:
        return 0;
    }

    return EINVAL;
}

uint8_t *sss_authtok_get_data(struct sss_auth_token *tok)
{
    return tok->data;
}

errno_t sss_authtok_get_password(struct sss_auth_token *tok,
                                 const char **pwd, size_t *len)
{
    switch (tok->type) {
    case SSS_AUTHTOK_TYPE_EMPTY:
        return ENOENT;
    case SSS_AUTHTOK_TYPE_PASSWORD:
        *pwd = (const char *)tok->data;
        if (len) {
            *len = tok->length - 1;
        }
        return EOK;
    case SSS_AUTHTOK_TYPE_CCFILE:
        return EACCES;
    }

    return EINVAL;
}

errno_t sss_authtok_get_ccfile(struct sss_auth_token *tok,
                               const char **ccfile, size_t *len)
{
    switch (tok->type) {
    case SSS_AUTHTOK_TYPE_EMPTY:
        return ENOENT;
    case SSS_AUTHTOK_TYPE_CCFILE:
        *ccfile = (const char *)tok->data;
        if (len) {
            *len = tok->length - 1;
        }
        return EOK;
    case SSS_AUTHTOK_TYPE_PASSWORD:
        return EACCES;
    }

    return EINVAL;
}

static errno_t sss_authtok_set_string(TALLOC_CTX *mem_ctx,
                                      struct sss_auth_token *tok,
                                      enum sss_authtok_type type,
                                      const char *context_name,
                                      const char *str, size_t len)
{
    size_t size;

    if (len == 0) {
        len = strlen(str);
    } else {
        while (len > 0 && str[len - 1] == '\0') len--;
    }

    if (len == 0) {
        /* we do not allow zero length typed tokens */
        return EINVAL;
    }

    size = len + 1;

    tok->data = talloc_named(mem_ctx, size, "%s", context_name);
    if (!tok->data) {
        return ENOMEM;
    }
    memcpy(tok->data, str, len);
    tok->data[len] = '\0';
    tok->type = type;
    tok->length = size;

    return EOK;

}

void sss_authtok_set_empty(struct sss_auth_token *tok)
{
    switch (tok->type) {
    case SSS_AUTHTOK_TYPE_EMPTY:
        return;
    case SSS_AUTHTOK_TYPE_PASSWORD:
        safezero(tok->data, tok->length);
        break;
    case SSS_AUTHTOK_TYPE_CCFILE:
        break;
    }

    tok->type = SSS_AUTHTOK_TYPE_EMPTY;
    talloc_zfree(tok->data);
    tok->length = 0;
}

errno_t sss_authtok_set_password(TALLOC_CTX *mem_ctx,
                                 struct sss_auth_token *tok,
                                 const char *password, size_t len)
{
    sss_authtok_set_empty(tok);

    return sss_authtok_set_string(mem_ctx, tok,
                                  SSS_AUTHTOK_TYPE_PASSWORD,
                                  "password", password, len);
}

errno_t sss_authtok_set_ccfile(TALLOC_CTX *mem_ctx,
                               struct sss_auth_token *tok,
                               const char *ccfile, size_t len)
{
    sss_authtok_set_empty(tok);

    return sss_authtok_set_string(mem_ctx, tok,
                                  SSS_AUTHTOK_TYPE_CCFILE,
                                  "ccfile", ccfile, len);
}

errno_t sss_authtok_set(TALLOC_CTX *mem_ctx,
                        struct sss_auth_token *tok,
                        enum sss_authtok_type type,
                        uint8_t *data, size_t len)
{
    switch (type) {
    case SSS_AUTHTOK_TYPE_PASSWORD:
        return sss_authtok_set_password(mem_ctx, tok, (const char *)data, len);
    case SSS_AUTHTOK_TYPE_CCFILE:
        return sss_authtok_set_ccfile(mem_ctx, tok, (const char *)data, len);
    case SSS_AUTHTOK_TYPE_EMPTY:
        sss_authtok_set_empty(tok);
        return EOK;
    }

    return EINVAL;
}

errno_t sss_authtok_copy(TALLOC_CTX *mem_ctx,
                         struct sss_auth_token *src,
                         struct sss_auth_token *dst)
{
    sss_authtok_set_empty(dst);

    if (src->type == SSS_AUTHTOK_TYPE_EMPTY) {
        return EOK;
    }

    dst->data = talloc_memdup(mem_ctx, src->data, src->length);
    if (!dst->data) {
        return ENOMEM;
    }
    dst->length = src->length;
    dst->type = src->type;

    return EOK;
}

void sss_authtok_wipe_password(struct sss_auth_token *tok)
{
    if (tok->type != SSS_AUTHTOK_TYPE_PASSWORD) {
        return;
    }

    safezero(tok->data, tok->length);
}