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
|
/* certinfo.c -- Functions to parse and process the X509 TLS id string
*
* GPLv2 only - Copyright (C) 2008 - 2010
* David Sommerseth <dazo@users.sourceforge.net>
*
* 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; version 2
* of the License.
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
/**
* @file certinfo.c
* @author David Sommerseth <dazo@users.sourceforge.net>
* @date 2008-08-06
*
* @brief Functions for parsing X.509 subject information
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <eurephia_nullsafe.h>
#include <certinfo.h>
/**
* Simple strcmp() wrapper, which makes it NULL safe.
*
* @param s input value
* @param v compare value
*
* @return Returns 1 if s and v are equal, otherwise 0.
*/
#define comp_attrib(s, v) ( (v == NULL || strlen_nullsafe(v) < 1) ? 0 : (strcmp(v, s) == 0) )
/**
* Parses a X.509 subject string into a certinfo structure
*
* @param input String containing a X.509 subject line
*
* @return Pointer to a certinfo structure containing the information
*/
certinfo *parse_tlsid(const char *input) {
char tmp[130], *mainp, *origptr, *sub, *tok, *tok2;
certinfo *ret = NULL;
if( (input == NULL) || strlen(input) < 5)
return NULL;
ret = (certinfo *) malloc_nullsafe(NULL, sizeof(certinfo)+2);
memset(&tmp, 0, 130);
mainp = strdup(input);
origptr = mainp;
tok = strsep(&mainp, "/\0");
while( tok != NULL ) {
if( (tok != NULL) && (strlen(tok) > 0 ) ) {
sub = strdup(tok);
tok2 = strsep(&sub, "=\0");
if( comp_attrib("O\0", tok2) ) {
ret->org = strdup(strsep(&sub, "=\0"));
} else if( comp_attrib("CN\0", tok2) ) {
ret->common_name = strdup(strsep(&sub, "=\0"));
} else if( comp_attrib("emailAddress\0", tok2) ) {
ret->email = strdup(strsep(&sub, "=\0"));
}
if( tok2 != NULL ) {
free(tok2); tok2 = NULL;
}
}
tok = strsep(&mainp, "/\0");
}
free(origptr); mainp = NULL; origptr = NULL;
/* Make sure we at least have empty NULL terminated strings */
if( ret->org == NULL ) {
ret->org = strdup("\0");
}
if( ret->common_name == NULL ) {
ret->common_name = strdup("\0");
}
if( ret->email == NULL ) {
ret->email = strdup("\0");
}
return ret;
}
/**
* Frees up the memory used by a certinfo structure
*
* @param p Pointer to a certinfo structure to be freed
*/
void free_certinfo(certinfo *p) {
if( p == NULL )
return;
if( p->digest != NULL )
free(p->digest);
if( p->org != NULL )
free(p->org);
if( p->common_name != NULL )
free(p->common_name);
if( p->email != NULL )
free(p->email);
free(p);
}
|
