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
|
/*
* Copyright (c) 2012-2014 Arne Schwabe
* Distributed under the GNU GPL v2 with additional terms. For full terms see the file doc/LICENSE.txt
*/
package de.blinkt.openvpn.core;
import android.content.Context;
import android.text.TextUtils;
import se.leap.bitmaskclient.R;
import de.blinkt.openvpn.VpnProfile;
import org.spongycastle.util.io.pem.PemObject;
import org.spongycastle.util.io.pem.PemReader;
import javax.security.auth.x500.X500Principal;
import java.io.*;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.security.cert.Certificate;
import java.security.cert.CertificateException;
import java.security.cert.CertificateFactory;
import java.security.cert.X509Certificate;
import java.util.Hashtable;
public class X509Utils {
public static Certificate getCertificateFromFile(String certfilename) throws FileNotFoundException, CertificateException {
CertificateFactory certFact = CertificateFactory.getInstance("X.509");
InputStream inStream;
if(VpnProfile.isEmbedded(certfilename)) {
// The java certifcate reader is ... kind of stupid
// It does NOT ignore chars before the --BEGIN ...
int subIndex = certfilename.indexOf("-----BEGIN CERTIFICATE-----");
subIndex = Math.max(0,subIndex);
inStream = new ByteArrayInputStream(certfilename.substring(subIndex).getBytes());
} else {
inStream = new FileInputStream(certfilename);
}
return certFact.generateCertificate(inStream);
}
public static PemObject readPemObjectFromFile (String keyfilename) throws IOException {
Reader inStream;
if(VpnProfile.isEmbedded(keyfilename))
inStream = new StringReader(VpnProfile.getEmbeddedContent(keyfilename));
else
inStream = new FileReader(new File(keyfilename));
PemReader pr = new PemReader(inStream);
PemObject r = pr.readPemObject();
pr.close();
return r;
}
public static String getCertificateFriendlyName (Context c, String filename) {
if(!TextUtils.isEmpty(filename)) {
try {
X509Certificate cert = (X509Certificate) getCertificateFromFile(filename);
return getCertificateFriendlyName(cert);
} catch (Exception e) {
VpnStatus.logError("Could not read certificate" + e.getLocalizedMessage());
}
}
return c.getString(R.string.cannotparsecert);
}
public static String getCertificateFriendlyName(X509Certificate cert) {
X500Principal principal = cert.getSubjectX500Principal();
byte[] encodedSubject = principal.getEncoded();
String friendlyName=null;
/* Hack so we do not have to ship a whole Spongy/bouncycastle */
Exception exp=null;
try {
Class X509NameClass = Class.forName("com.android.org.bouncycastle.asn1.x509.X509Name");
Method getInstance = X509NameClass.getMethod("getInstance",Object.class);
Hashtable defaultSymbols = (Hashtable) X509NameClass.getField("DefaultSymbols").get(X509NameClass);
if (!defaultSymbols.containsKey("1.2.840.113549.1.9.1"))
defaultSymbols.put("1.2.840.113549.1.9.1","eMail");
Object subjectName = getInstance.invoke(X509NameClass, encodedSubject);
Method toString = X509NameClass.getMethod("toString",boolean.class,Hashtable.class);
friendlyName= (String) toString.invoke(subjectName,true,defaultSymbols);
} catch (ClassNotFoundException e) {
exp =e ;
} catch (NoSuchMethodException e) {
exp =e;
} catch (InvocationTargetException e) {
exp =e;
} catch (IllegalAccessException e) {
exp =e;
} catch (NoSuchFieldException e) {
exp =e;
}
if (exp!=null)
VpnStatus.logException("Getting X509 Name from certificate", exp);
/* Fallback if the reflection method did not work */
if(friendlyName==null)
friendlyName = principal.getName();
// Really evil hack to decode email address
// See: http://code.google.com/p/android/issues/detail?id=21531
String[] parts = friendlyName.split(",");
for (int i=0;i<parts.length;i++){
String part = parts[i];
if (part.startsWith("1.2.840.113549.1.9.1=#16")) {
parts[i] = "email=" + ia5decode(part.replace("1.2.840.113549.1.9.1=#16", ""));
}
}
friendlyName = TextUtils.join(",", parts);
return friendlyName;
}
public static boolean isPrintableChar(char c) {
Character.UnicodeBlock block = Character.UnicodeBlock.of( c );
return (!Character.isISOControl(c)) &&
block != null &&
block != Character.UnicodeBlock.SPECIALS;
}
private static String ia5decode(String ia5string) {
String d = "";
for (int i=1;i<ia5string.length();i=i+2) {
String hexstr = ia5string.substring(i-1,i+1);
char c = (char) Integer.parseInt(hexstr,16);
if (isPrintableChar(c)) {
d+=c;
} else if (i==1 && (c==0x12 || c==0x1b)) {
; // ignore
} else {
d += "\\x" + hexstr;
}
}
return d;
}
}
|
