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
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
|
package org.bouncycastle.jcajce.provider.asymmetric.dsa;
import java.io.IOException;
import java.math.BigInteger;
import java.security.InvalidKeyException;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.SecureRandom;
import java.security.SignatureException;
import java.security.SignatureSpi;
import java.security.interfaces.DSAKey;
import java.security.spec.AlgorithmParameterSpec;
import org.bouncycastle.asn1.ASN1Encoding;
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo;
import org.bouncycastle.asn1.x509.X509ObjectIdentifiers;
import org.bouncycastle.crypto.CipherParameters;
import org.bouncycastle.crypto.DSA;
import org.bouncycastle.crypto.Digest;
import org.bouncycastle.crypto.digests.NullDigest;
import org.bouncycastle.crypto.digests.SHA1Digest;
import org.bouncycastle.crypto.digests.SHA224Digest;
import org.bouncycastle.crypto.digests.SHA256Digest;
import org.bouncycastle.crypto.digests.SHA384Digest;
import org.bouncycastle.crypto.digests.SHA512Digest;
import org.bouncycastle.crypto.params.ParametersWithRandom;
import org.bouncycastle.crypto.signers.HMacDSAKCalculator;
public class DSASigner
extends SignatureSpi
implements PKCSObjectIdentifiers, X509ObjectIdentifiers
{
private Digest digest;
private DSA signer;
private SecureRandom random;
protected DSASigner(
Digest digest,
DSA signer)
{
this.digest = digest;
this.signer = signer;
}
protected void engineInitVerify(
PublicKey publicKey)
throws InvalidKeyException
{
CipherParameters param;
if (publicKey instanceof DSAKey)
{
param = DSAUtil.generatePublicKeyParameter(publicKey);
}
else
{
try
{
byte[] bytes = publicKey.getEncoded();
publicKey = new BCDSAPublicKey(SubjectPublicKeyInfo.getInstance(bytes));
if (publicKey instanceof DSAKey)
{
param = DSAUtil.generatePublicKeyParameter(publicKey);
}
else
{
throw new InvalidKeyException("can't recognise key type in DSA based signer");
}
}
catch (Exception e)
{
throw new InvalidKeyException("can't recognise key type in DSA based signer");
}
}
digest.reset();
signer.init(false, param);
}
protected void engineInitSign(
PrivateKey privateKey,
SecureRandom random)
throws InvalidKeyException
{
this.random = random;
engineInitSign(privateKey);
}
protected void engineInitSign(
PrivateKey privateKey)
throws InvalidKeyException
{
CipherParameters param;
param = DSAUtil.generatePrivateKeyParameter(privateKey);
if (random != null)
{
param = new ParametersWithRandom(param, random);
}
digest.reset();
signer.init(true, param);
}
protected void engineUpdate(
byte b)
throws SignatureException
{
digest.update(b);
}
protected void engineUpdate(
byte[] b,
int off,
int len)
throws SignatureException
{
digest.update(b, off, len);
}
protected byte[] engineSign()
throws SignatureException
{
byte[] hash = new byte[digest.getDigestSize()];
digest.doFinal(hash, 0);
try
{
BigInteger[] sig = signer.generateSignature(hash);
return derEncode(sig[0], sig[1]);
}
catch (Exception e)
{
throw new SignatureException(e.toString());
}
}
protected boolean engineVerify(
byte[] sigBytes)
throws SignatureException
{
byte[] hash = new byte[digest.getDigestSize()];
digest.doFinal(hash, 0);
BigInteger[] sig;
try
{
sig = derDecode(sigBytes);
}
catch (Exception e)
{
throw new SignatureException("error decoding signature bytes.");
}
return signer.verifySignature(hash, sig[0], sig[1]);
}
protected void engineSetParameter(
AlgorithmParameterSpec params)
{
throw new UnsupportedOperationException("engineSetParameter unsupported");
}
/**
* @deprecated replaced with <a href = "#engineSetParameter(java.security.spec.AlgorithmParameterSpec)">
*/
protected void engineSetParameter(
String param,
Object value)
{
throw new UnsupportedOperationException("engineSetParameter unsupported");
}
/**
* @deprecated
*/
protected Object engineGetParameter(
String param)
{
throw new UnsupportedOperationException("engineSetParameter unsupported");
}
private byte[] derEncode(
BigInteger r,
BigInteger s)
throws IOException
{
ASN1Integer[] rs = new ASN1Integer[]{ new ASN1Integer(r), new ASN1Integer(s) };
return new DERSequence(rs).getEncoded(ASN1Encoding.DER);
}
private BigInteger[] derDecode(
byte[] encoding)
throws IOException
{
ASN1Sequence s = (ASN1Sequence)ASN1Primitive.fromByteArray(encoding);
return new BigInteger[]{
((ASN1Integer)s.getObjectAt(0)).getValue(),
((ASN1Integer)s.getObjectAt(1)).getValue()
};
}
static public class stdDSA
extends DSASigner
{
public stdDSA()
{
super(new SHA1Digest(), new org.bouncycastle.crypto.signers.DSASigner());
}
}
static public class detDSA
extends DSASigner
{
public detDSA()
{
super(new SHA1Digest(), new org.bouncycastle.crypto.signers.DSASigner(new HMacDSAKCalculator(new SHA1Digest())));
}
}
static public class dsa224
extends DSASigner
{
public dsa224()
{
super(new SHA224Digest(), new org.bouncycastle.crypto.signers.DSASigner());
}
}
static public class detDSA224
extends DSASigner
{
public detDSA224()
{
super(new SHA224Digest(), new org.bouncycastle.crypto.signers.DSASigner(new HMacDSAKCalculator(new SHA224Digest())));
}
}
static public class dsa256
extends DSASigner
{
public dsa256()
{
super(new SHA256Digest(), new org.bouncycastle.crypto.signers.DSASigner());
}
}
static public class detDSA256
extends DSASigner
{
public detDSA256()
{
super(new SHA256Digest(), new org.bouncycastle.crypto.signers.DSASigner(new HMacDSAKCalculator(new SHA256Digest())));
}
}
static public class dsa384
extends DSASigner
{
public dsa384()
{
super(new SHA384Digest(), new org.bouncycastle.crypto.signers.DSASigner());
}
}
static public class detDSA384
extends DSASigner
{
public detDSA384()
{
super(new SHA384Digest(), new org.bouncycastle.crypto.signers.DSASigner(new HMacDSAKCalculator(new SHA384Digest())));
}
}
static public class dsa512
extends DSASigner
{
public dsa512()
{
super(new SHA512Digest(), new org.bouncycastle.crypto.signers.DSASigner());
}
}
static public class detDSA512
extends DSASigner
{
public detDSA512()
{
super(new SHA512Digest(), new org.bouncycastle.crypto.signers.DSASigner(new HMacDSAKCalculator(new SHA512Digest())));
}
}
static public class noneDSA
extends DSASigner
{
public noneDSA()
{
super(new NullDigest(), new org.bouncycastle.crypto.signers.DSASigner());
}
}
}
|
