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
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
|
using System;
using System.Collections.Generic;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.Cms;
using Org.BouncyCastle.Asn1.CryptoPro;
using Org.BouncyCastle.Asn1.Kisa;
using Org.BouncyCastle.Asn1.Misc;
using Org.BouncyCastle.Asn1.Nist;
using Org.BouncyCastle.Asn1.Nsri;
using Org.BouncyCastle.Asn1.Ntt;
using Org.BouncyCastle.Asn1.Oiw;
using Org.BouncyCastle.Asn1.Pkcs;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Utilities.Collections;
namespace Org.BouncyCastle.Security
{
public static class ParameterUtilities
{
private static readonly IDictionary<string, string> Algorithms =
new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
private static readonly IDictionary<string, int> BasicIVSizes =
new Dictionary<string, int>(StringComparer.OrdinalIgnoreCase);
static ParameterUtilities()
{
AddAlgorithm("AES",
"AESWRAP");
AddAlgorithm("AES128",
SecurityUtilities.WrongAes128,
NistObjectIdentifiers.IdAes128Cbc,
NistObjectIdentifiers.IdAes128Ccm,
NistObjectIdentifiers.IdAes128Cfb,
NistObjectIdentifiers.IdAes128Ecb,
NistObjectIdentifiers.IdAes128Gcm,
NistObjectIdentifiers.IdAes128Ofb,
NistObjectIdentifiers.IdAes128Wrap);
AddAlgorithm("AES192",
SecurityUtilities.WrongAes192,
NistObjectIdentifiers.IdAes192Cbc,
NistObjectIdentifiers.IdAes192Ccm,
NistObjectIdentifiers.IdAes192Cfb,
NistObjectIdentifiers.IdAes192Ecb,
NistObjectIdentifiers.IdAes192Gcm,
NistObjectIdentifiers.IdAes192Ofb,
NistObjectIdentifiers.IdAes192Wrap);
AddAlgorithm("AES256",
SecurityUtilities.WrongAes256,
NistObjectIdentifiers.IdAes256Cbc,
NistObjectIdentifiers.IdAes256Ccm,
NistObjectIdentifiers.IdAes256Cfb,
NistObjectIdentifiers.IdAes256Ecb,
NistObjectIdentifiers.IdAes256Gcm,
NistObjectIdentifiers.IdAes256Ofb,
NistObjectIdentifiers.IdAes256Wrap);
AddAlgorithm("ARIA");
AddAlgorithm("ARIA128",
NsriObjectIdentifiers.id_aria128_cbc,
NsriObjectIdentifiers.id_aria128_ccm,
NsriObjectIdentifiers.id_aria128_cfb,
NsriObjectIdentifiers.id_aria128_ctr,
NsriObjectIdentifiers.id_aria128_ecb,
NsriObjectIdentifiers.id_aria128_gcm,
NsriObjectIdentifiers.id_aria128_ocb2,
NsriObjectIdentifiers.id_aria128_ofb);
AddAlgorithm("ARIA192",
NsriObjectIdentifiers.id_aria192_cbc,
NsriObjectIdentifiers.id_aria192_ccm,
NsriObjectIdentifiers.id_aria192_cfb,
NsriObjectIdentifiers.id_aria192_ctr,
NsriObjectIdentifiers.id_aria192_ecb,
NsriObjectIdentifiers.id_aria192_gcm,
NsriObjectIdentifiers.id_aria192_ocb2,
NsriObjectIdentifiers.id_aria192_ofb);
AddAlgorithm("ARIA256",
NsriObjectIdentifiers.id_aria256_cbc,
NsriObjectIdentifiers.id_aria256_ccm,
NsriObjectIdentifiers.id_aria256_cfb,
NsriObjectIdentifiers.id_aria256_ctr,
NsriObjectIdentifiers.id_aria256_ecb,
NsriObjectIdentifiers.id_aria256_gcm,
NsriObjectIdentifiers.id_aria256_ocb2,
NsriObjectIdentifiers.id_aria256_ofb);
AddAlgorithm("BLOWFISH",
"1.3.6.1.4.1.3029.1.2");
AddAlgorithm("CAMELLIA",
"CAMELLIAWRAP");
AddAlgorithm("CAMELLIA128",
NttObjectIdentifiers.IdCamellia128Cbc,
NttObjectIdentifiers.IdCamellia128Wrap);
AddAlgorithm("CAMELLIA192",
NttObjectIdentifiers.IdCamellia192Cbc,
NttObjectIdentifiers.IdCamellia192Wrap);
AddAlgorithm("CAMELLIA256",
NttObjectIdentifiers.IdCamellia256Cbc,
NttObjectIdentifiers.IdCamellia256Wrap);
AddAlgorithm("CAST5",
"1.2.840.113533.7.66.10");
AddAlgorithm("CAST6");
AddAlgorithm("CHACHA");
AddAlgorithm("CHACHA7539",
"CHACHA20",
"CHACHA20-POLY1305",
PkcsObjectIdentifiers.IdAlgAeadChaCha20Poly1305);
AddAlgorithm("DES",
OiwObjectIdentifiers.DesCbc,
OiwObjectIdentifiers.DesCfb,
OiwObjectIdentifiers.DesEcb,
OiwObjectIdentifiers.DesOfb);
AddAlgorithm("DESEDE",
"DESEDEWRAP",
"TDEA",
OiwObjectIdentifiers.DesEde,
PkcsObjectIdentifiers.IdAlgCms3DesWrap);
AddAlgorithm("DESEDE3",
PkcsObjectIdentifiers.DesEde3Cbc);
AddAlgorithm("GOST28147",
"GOST",
"GOST-28147",
CryptoProObjectIdentifiers.GostR28147Gcfb);
AddAlgorithm("HC128");
AddAlgorithm("HC256");
AddAlgorithm("IDEA",
"1.3.6.1.4.1.188.7.1.1.2");
AddAlgorithm("NOEKEON");
AddAlgorithm("RC2",
PkcsObjectIdentifiers.RC2Cbc,
PkcsObjectIdentifiers.IdAlgCmsRC2Wrap);
AddAlgorithm("RC4",
"ARC4",
"1.2.840.113549.3.4");
AddAlgorithm("RC5",
"RC5-32");
AddAlgorithm("RC5-64");
AddAlgorithm("RC6");
AddAlgorithm("RIJNDAEL");
AddAlgorithm("SALSA20");
AddAlgorithm("SEED",
KisaObjectIdentifiers.IdNpkiAppCmsSeedWrap,
KisaObjectIdentifiers.IdSeedCbc);
AddAlgorithm("SERPENT");
AddAlgorithm("SKIPJACK");
AddAlgorithm("SM4");
AddAlgorithm("TEA");
AddAlgorithm("THREEFISH-256");
AddAlgorithm("THREEFISH-512");
AddAlgorithm("THREEFISH-1024");
AddAlgorithm("TNEPRES");
AddAlgorithm("TWOFISH");
AddAlgorithm("VMPC");
AddAlgorithm("VMPC-KSA3");
AddAlgorithm("XTEA");
AddBasicIVSizeEntries(8, "BLOWFISH", "CHACHA", "DES", "DESEDE", "DESEDE3", "SALSA20");
AddBasicIVSizeEntries(12, "CHACHA7539");
AddBasicIVSizeEntries(16, "AES", "AES128", "AES192", "AES256", "ARIA", "ARIA128", "ARIA192", "ARIA256",
"CAMELLIA", "CAMELLIA128", "CAMELLIA192", "CAMELLIA256", "NOEKEON", "SEED", "SM4");
// TODO These algorithms support an IV
// but JCE doesn't seem to provide an AlgorithmParametersGenerator for them
// "RIJNDAEL", "SKIPJACK", "TWOFISH"
}
private static void AddAlgorithm(string canonicalName, params object[] aliases)
{
Algorithms[canonicalName] = canonicalName;
foreach (object alias in aliases)
{
Algorithms[alias.ToString()] = canonicalName;
}
}
private static void AddBasicIVSizeEntries(int size, params string[] algorithms)
{
foreach (string algorithm in algorithms)
{
BasicIVSizes.Add(algorithm, size);
}
}
public static string GetCanonicalAlgorithmName(string algorithm)
{
return CollectionUtilities.GetValueOrNull(Algorithms, algorithm);
}
public static KeyParameter CreateKeyParameter(DerObjectIdentifier algOid, byte[] keyBytes)
{
return CreateKeyParameter(algOid.Id, keyBytes, 0, keyBytes.Length);
}
public static KeyParameter CreateKeyParameter(string algorithm, byte[] keyBytes)
{
return CreateKeyParameter(algorithm, keyBytes, 0, keyBytes.Length);
}
public static KeyParameter CreateKeyParameter(
DerObjectIdentifier algOid,
byte[] keyBytes,
int offset,
int length)
{
return CreateKeyParameter(algOid.Id, keyBytes, offset, length);
}
public static KeyParameter CreateKeyParameter(
string algorithm,
byte[] keyBytes,
int offset,
int length)
{
if (algorithm == null)
throw new ArgumentNullException(nameof(algorithm));
string canonical = GetCanonicalAlgorithmName(algorithm);
if (canonical == null)
throw new SecurityUtilityException("Algorithm " + algorithm + " not recognised.");
if (canonical == "DES")
return new DesParameters(keyBytes, offset, length);
if (canonical == "DESEDE" || canonical =="DESEDE3")
return new DesEdeParameters(keyBytes, offset, length);
if (canonical == "RC2")
return new RC2Parameters(keyBytes, offset, length);
return new KeyParameter(keyBytes, offset, length);
}
public static ICipherParameters GetCipherParameters(
DerObjectIdentifier algOid,
ICipherParameters key,
Asn1Object asn1Params)
{
return GetCipherParameters(algOid.Id, key, asn1Params);
}
public static ICipherParameters GetCipherParameters(
string algorithm,
ICipherParameters key,
Asn1Object asn1Params)
{
if (algorithm == null)
throw new ArgumentNullException("algorithm");
if (NistObjectIdentifiers.IdAes128Gcm.Id.Equals(algorithm) ||
NistObjectIdentifiers.IdAes192Gcm.Id.Equals(algorithm) ||
NistObjectIdentifiers.IdAes256Gcm.Id.Equals(algorithm))
{
if (!(key is KeyParameter keyParameter))
throw new ArgumentException("key data must be accessible for GCM operation");
var gcmParameters = GcmParameters.GetInstance(asn1Params);
return new AeadParameters(keyParameter, gcmParameters.IcvLen * 8, gcmParameters.GetNonce());
}
if (NistObjectIdentifiers.IdAes128Ccm.Id.Equals(algorithm) ||
NistObjectIdentifiers.IdAes192Ccm.Id.Equals(algorithm) ||
NistObjectIdentifiers.IdAes256Ccm.Id.Equals(algorithm))
{
if (!(key is KeyParameter keyParameter))
throw new ArgumentException("key data must be accessible for CCM operation");
var ccmParameters = CcmParameters.GetInstance(asn1Params);
return new AeadParameters(keyParameter, ccmParameters.IcvLen * 8, ccmParameters.GetNonce());
}
string canonical = GetCanonicalAlgorithmName(algorithm);
if (canonical == null)
throw new SecurityUtilityException("Algorithm " + algorithm + " not recognised.");
byte[] iv = null;
try
{
// TODO These algorithms support an IV
// but JCE doesn't seem to provide an AlgorithmParametersGenerator for them
// "RIJNDAEL", "SKIPJACK", "TWOFISH"
int basicIVKeySize = FindBasicIVSize(canonical);
if (basicIVKeySize != -1
|| canonical == "RIJNDAEL" || canonical == "SKIPJACK" || canonical == "TWOFISH")
{
iv = ((Asn1OctetString) asn1Params).GetOctets();
}
else if (canonical == "CAST5")
{
iv = Cast5CbcParameters.GetInstance(asn1Params).GetIV();
}
else if (canonical == "IDEA")
{
iv = IdeaCbcPar.GetInstance(asn1Params).GetIV();
}
else if (canonical == "RC2")
{
iv = RC2CbcParameter.GetInstance(asn1Params).GetIV();
}
}
catch (Exception e)
{
throw new ArgumentException("Could not process ASN.1 parameters", e);
}
if (iv != null)
{
return new ParametersWithIV(key, iv);
}
throw new SecurityUtilityException("Algorithm " + algorithm + " not recognised.");
}
public static Asn1Encodable GenerateParameters(
DerObjectIdentifier algID,
SecureRandom random)
{
return GenerateParameters(algID.Id, random);
}
public static Asn1Encodable GenerateParameters(
string algorithm,
SecureRandom random)
{
if (algorithm == null)
throw new ArgumentNullException("algorithm");
string canonical = GetCanonicalAlgorithmName(algorithm);
if (canonical == null)
throw new SecurityUtilityException("Algorithm " + algorithm + " not recognised.");
// TODO These algorithms support an IV
// but JCE doesn't seem to provide an AlgorithmParametersGenerator for them
// "RIJNDAEL", "SKIPJACK", "TWOFISH"
int basicIVKeySize = FindBasicIVSize(canonical);
if (basicIVKeySize != -1)
return CreateIVOctetString(random, basicIVKeySize);
if (canonical == "CAST5")
return new Cast5CbcParameters(CreateIV(random, 8), 128);
if (canonical == "IDEA")
return new IdeaCbcPar(CreateIV(random, 8));
if (canonical == "RC2")
return new RC2CbcParameter(CreateIV(random, 8));
throw new SecurityUtilityException("Algorithm " + algorithm + " not recognised.");
}
public static ICipherParameters WithRandom(ICipherParameters cp, SecureRandom random)
{
if (random != null)
{
cp = new ParametersWithRandom(cp, random);
}
return cp;
}
private static Asn1OctetString CreateIVOctetString(SecureRandom random, int ivLength)
{
return new DerOctetString(CreateIV(random, ivLength));
}
private static byte[] CreateIV(SecureRandom random, int ivLength)
{
return SecureRandom.GetNextBytes(random, ivLength);
}
private static int FindBasicIVSize(string canonicalName)
{
return BasicIVSizes.TryGetValue(canonicalName, out int keySize) ? keySize : -1;
}
}
}
|
