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
|
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Network Security Services.
*
* The Initial Developer of the Original Code is Nelson B Bolyard
* Portions created by the Initial Developer are Copyright (C) 2007
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include <string.h>
#include "secitem.h"
#include "secport.h"
#include "secerr.h"
/* if to->data is not NULL, and to->len is large enough to hold the result,
* then the resultant OID will be copyed into to->data, and to->len will be
* changed to show the actual OID length.
* Otherwise, memory for the OID will be allocated (from the caller's
* PLArenaPool, if pool is non-NULL) and to->data will receive the address
* of the allocated data, and to->len will receive the OID length.
* The original value of to->data is not freed when a new buffer is allocated.
*
* The input string may begin with "OID." and this still be ignored.
* The length of the input string is given in len. If len == 0, then
* len will be computed as strlen(from), meaning it must be NUL terminated.
* It is an error if from == NULL, or if *from == '\0'.
*/
SECStatus
SEC_StringToOID(PLArenaPool *pool, SECItem *to, const char *from, PRUint32 len)
{
PRUint32 decimal_numbers = 0;
PRUint32 result_bytes = 0;
SECStatus rv;
PRUint8 result[1024];
static const PRUint32 max_decimal = (0xffffffff / 10);
static const char OIDstring[] = {"OID."};
if (!from || !to) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
if (!len) {
len = PL_strlen(from);
}
if (len >= 4 && !PL_strncasecmp(from, OIDstring, 4)) {
from += 4; /* skip leading "OID." if present */
len -= 4;
}
if (!len) {
bad_data:
PORT_SetError(SEC_ERROR_BAD_DATA);
return SECFailure;
}
do {
PRUint32 decimal = 0;
while (len > 0 && isdigit(*from)) {
PRUint32 addend = (*from++ - '0');
--len;
if (decimal > max_decimal) /* overflow */
goto bad_data;
decimal = (decimal * 10) + addend;
if (decimal < addend) /* overflow */
goto bad_data;
}
if (len != 0 && *from != '.') {
goto bad_data;
}
if (decimal_numbers == 0) {
if (decimal > 2)
goto bad_data;
result[0] = decimal * 40;
result_bytes = 1;
} else if (decimal_numbers == 1) {
if (decimal > 40)
goto bad_data;
result[0] += decimal;
} else {
/* encode the decimal number, */
PRUint8 * rp;
PRUint32 num_bytes = 0;
PRUint32 tmp = decimal;
while (tmp) {
num_bytes++;
tmp >>= 7;
}
if (!num_bytes )
++num_bytes; /* use one byte for a zero value */
if (num_bytes + result_bytes > sizeof result)
goto bad_data;
tmp = num_bytes;
rp = result + result_bytes - 1;
rp[tmp] = (PRUint8)(decimal & 0x7f);
decimal >>= 7;
while (--tmp > 0) {
rp[tmp] = (PRUint8)(decimal | 0x80);
decimal >>= 7;
}
result_bytes += num_bytes;
}
++decimal_numbers;
if (len > 0) { /* skip trailing '.' */
++from;
--len;
}
} while (len > 0);
/* now result contains result_bytes of data */
if (to->data && to->len >= result_bytes) {
PORT_Memcpy(to->data, result, to->len = result_bytes);
rv = SECSuccess;
} else {
SECItem result_item = {siBuffer, NULL, 0 };
result_item.data = result;
result_item.len = result_bytes;
rv = SECITEM_CopyItem(pool, to, &result_item);
}
return rv;
}
|
