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
|
using System;
using System.IO;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.BC;
using Org.BouncyCastle.Asn1.Pkcs;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Utilities;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Pqc.Asn1;
using Org.BouncyCastle.Pqc.Crypto.Bike;
using Org.BouncyCastle.Pqc.Crypto.Cmce;
using Org.BouncyCastle.Pqc.Crypto.Crystals.Dilithium;
using Org.BouncyCastle.Pqc.Crypto.Crystals.Kyber;
using Org.BouncyCastle.Pqc.Crypto.Falcon;
using Org.BouncyCastle.Pqc.Crypto.Frodo;
using Org.BouncyCastle.Pqc.Crypto.Hqc;
using Org.BouncyCastle.Pqc.Crypto.Lms;
using Org.BouncyCastle.Pqc.Crypto.Picnic;
using Org.BouncyCastle.Pqc.Crypto.Saber;
using Org.BouncyCastle.Pqc.Crypto.Sike;
using Org.BouncyCastle.Pqc.Crypto.SphincsPlus;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Pqc.Crypto.Utilities
{
public static class PqcPrivateKeyFactory
{
/// <summary> Create a private key parameter from a PKCS8 PrivateKeyInfo encoding.</summary>
/// <param name="privateKeyInfoData"> the PrivateKeyInfo encoding</param>
/// <returns> a suitable private key parameter</returns>
/// <exception cref="IOException"> on an error decoding the key</exception>
public static AsymmetricKeyParameter CreateKey(byte[] privateKeyInfoData)
{
return CreateKey(PrivateKeyInfo.GetInstance(Asn1Object.FromByteArray(privateKeyInfoData)));
}
/// <summary> Create a private key parameter from a PKCS8 PrivateKeyInfo encoding read from a stream</summary>
/// <param name="inStr"> the stream to read the PrivateKeyInfo encoding from</param>
/// <returns> a suitable private key parameter</returns>
/// <exception cref="IOException"> on an error decoding the key</exception>
public static AsymmetricKeyParameter CreateKey(Stream inStr)
{
return CreateKey(PrivateKeyInfo.GetInstance(new Asn1InputStream(inStr).ReadObject()));
}
/// <summary> Create a private key parameter from the passed in PKCS8 PrivateKeyInfo object.</summary>
/// <param name="keyInfo"> the PrivateKeyInfo object containing the key material</param>
/// <returns> a suitable private key parameter</returns>
/// <exception cref="IOException"> on an error decoding the key</exception>
public static AsymmetricKeyParameter CreateKey(PrivateKeyInfo keyInfo)
{
AlgorithmIdentifier algID = keyInfo.PrivateKeyAlgorithm;
DerObjectIdentifier algOid = algID.Algorithm;
if (algOid.Equals(PkcsObjectIdentifiers.IdAlgHssLmsHashsig))
{
byte[] keyEnc = Asn1OctetString.GetInstance(keyInfo.ParsePrivateKey()).GetOctets();
DerBitString pubKey = keyInfo.PublicKeyData;
if (Pack.BE_To_UInt32(keyEnc, 0) == 1)
{
if (pubKey != null)
{
byte[] pubEnc = pubKey.GetOctets();
return LmsPrivateKeyParameters.GetInstance(Arrays.CopyOfRange(keyEnc, 4, keyEnc.Length),
Arrays.CopyOfRange(pubEnc, 4, pubEnc.Length));
}
return LmsPrivateKeyParameters.GetInstance(Arrays.CopyOfRange(keyEnc, 4, keyEnc.Length));
}
}
if (algOid.On(BCObjectIdentifiers.pqc_kem_mceliece))
{
CmcePrivateKey cmceKey = CmcePrivateKey.GetInstance(keyInfo.ParsePrivateKey());
CmceParameters spParams = PqcUtilities.McElieceParamsLookup(algOid);
return new CmcePrivateKeyParameters(spParams, cmceKey.Delta, cmceKey.C, cmceKey.G, cmceKey.Alpha, cmceKey.S);
}
if (algOid.On(BCObjectIdentifiers.pqc_kem_frodo))
{
byte[] keyEnc = Asn1OctetString.GetInstance(keyInfo.ParsePrivateKey()).GetOctets();
FrodoParameters spParams = PqcUtilities.FrodoParamsLookup(algOid);
return new FrodoPrivateKeyParameters(spParams, keyEnc);
}
if (algOid.On(BCObjectIdentifiers.sphincsPlus))
{
SphincsPlusPrivateKey spKey = SphincsPlusPrivateKey.GetInstance(keyInfo.ParsePrivateKey());
SphincsPlusParameters spParams = PqcUtilities.SphincsPlusParamsLookup(algOid);
SphincsPlusPublicKey publicKey = spKey.PublicKey;
return new SphincsPlusPrivateKeyParameters(spParams, spKey.GetSkseed(), spKey.GetSkprf(),
publicKey.GetPkseed(), publicKey.GetPkroot());
}
if (algOid.On(BCObjectIdentifiers.pqc_kem_saber))
{
byte[] keyEnc = Asn1OctetString.GetInstance(keyInfo.ParsePrivateKey()).GetOctets();
SaberParameters spParams = PqcUtilities.SaberParamsLookup(algOid);
return new SaberPrivateKeyParameters(spParams, keyEnc);
}
if (algOid.On(BCObjectIdentifiers.picnic))
{
byte[] keyEnc = Asn1OctetString.GetInstance(keyInfo.ParsePrivateKey()).GetOctets();
PicnicParameters picnicParams = PqcUtilities.PicnicParamsLookup(algOid);
return new PicnicPrivateKeyParameters(picnicParams, keyEnc);
}
#pragma warning disable CS0618 // Type or member is obsolete
if (algOid.On(BCObjectIdentifiers.pqc_kem_sike))
{
byte[] keyEnc = Asn1OctetString.GetInstance(keyInfo.ParsePrivateKey()).GetOctets();
SikeParameters sikeParams = PqcUtilities.SikeParamsLookup(algOid);
return new SikePrivateKeyParameters(sikeParams, keyEnc);
}
#pragma warning restore CS0618 // Type or member is obsolete
if (algOid.On(BCObjectIdentifiers.pqc_kem_bike))
{
byte[] keyEnc = Asn1OctetString.GetInstance(keyInfo.ParsePrivateKey()).GetOctets();
BikeParameters bikeParams = PqcUtilities.BikeParamsLookup(algOid);
byte[] h0 = Arrays.CopyOfRange(keyEnc, 0, bikeParams.RByte);
byte[] h1 = Arrays.CopyOfRange(keyEnc, bikeParams.RByte, 2 * bikeParams.RByte);
byte[] sigma = Arrays.CopyOfRange(keyEnc, 2 * bikeParams.RByte, keyEnc.Length);
return new BikePrivateKeyParameters(bikeParams, h0, h1, sigma);
}
if (algOid.On(BCObjectIdentifiers.pqc_kem_hqc))
{
byte[] keyEnc = Asn1OctetString.GetInstance(keyInfo.ParsePrivateKey()).GetOctets();
HqcParameters hqcParams = PqcUtilities.HqcParamsLookup(algOid);
return new HqcPrivateKeyParameters(hqcParams, keyEnc);
}
if (algOid.On(BCObjectIdentifiers.pqc_kem_kyber))
{
KyberPrivateKey kyberKey = KyberPrivateKey.GetInstance(keyInfo.ParsePrivateKey());
KyberParameters kyberParams = PqcUtilities.KyberParamsLookup(algOid);
#pragma warning disable CS0618 // Type or member is obsolete
KyberPublicKey pubKey = kyberKey.PublicKey;
#pragma warning restore CS0618 // Type or member is obsolete
if (pubKey != null)
{
return new KyberPrivateKeyParameters(kyberParams, kyberKey.GetS(), kyberKey.GetHpk(),
kyberKey.GetNonce(), pubKey.T, pubKey.Rho);
}
return new KyberPrivateKeyParameters(kyberParams, kyberKey.GetS(), kyberKey.GetHpk(),
kyberKey.GetNonce(), null, null);
}
if (algOid.Equals(BCObjectIdentifiers.dilithium2) ||
algOid.Equals(BCObjectIdentifiers.dilithium3) ||
algOid.Equals(BCObjectIdentifiers.dilithium5) ||
algOid.Equals(BCObjectIdentifiers.dilithium2_aes) ||
algOid.Equals(BCObjectIdentifiers.dilithium3_aes) ||
algOid.Equals(BCObjectIdentifiers.dilithium5_aes))
{
Asn1Sequence keyEnc = Asn1Sequence.GetInstance(keyInfo.ParsePrivateKey());
DilithiumParameters spParams = PqcUtilities.DilithiumParamsLookup(algOid);
int version = DerInteger.GetInstance(keyEnc[0]).IntValueExact;
if (version != 0)
throw new IOException("unknown private key version: " + version);
byte[] t1 = null;
DerBitString publicKeyData = keyInfo.PublicKeyData;
if (publicKeyData != null)
{
var pubParams = PqcPublicKeyFactory.DilithiumConverter.GetPublicKeyParameters(spParams,
publicKeyData);
t1 = pubParams.GetT1();
}
return new DilithiumPrivateKeyParameters(spParams,
DerBitString.GetInstance(keyEnc[1]).GetOctets(),
DerBitString.GetInstance(keyEnc[2]).GetOctets(),
DerBitString.GetInstance(keyEnc[3]).GetOctets(),
DerBitString.GetInstance(keyEnc[4]).GetOctets(),
DerBitString.GetInstance(keyEnc[5]).GetOctets(),
DerBitString.GetInstance(keyEnc[6]).GetOctets(),
t1); // encT1
}
if (algOid.Equals(BCObjectIdentifiers.falcon_512) ||
algOid.Equals(BCObjectIdentifiers.falcon_1024))
{
Asn1Sequence keyEnc = Asn1Sequence.GetInstance(keyInfo.ParsePrivateKey());
FalconParameters spParams = PqcUtilities.FalconParamsLookup(algOid);
DerBitString publicKeyData = keyInfo.PublicKeyData;
int version = DerInteger.GetInstance(keyEnc[0]).IntValueExact;
if (version != 1)
throw new IOException("unknown private key version: " + version);
if (keyInfo.PublicKeyData != null)
{
//ASN1Sequence pubKey = ASN1Sequence.getInstance(keyInfo.getPublicKeyData().getOctets());
return new FalconPrivateKeyParameters(spParams,
Asn1OctetString.GetInstance(keyEnc[1]).GetOctets(),
Asn1OctetString.GetInstance(keyEnc[2]).GetOctets(),
Asn1OctetString.GetInstance(keyEnc[3]).GetOctets(),
publicKeyData.GetOctets()); // encT1
}
else
{
return new FalconPrivateKeyParameters(spParams,
Asn1OctetString.GetInstance(keyEnc[1]).GetOctets(),
Asn1OctetString.GetInstance(keyEnc[2]).GetOctets(),
Asn1OctetString.GetInstance(keyEnc[3]).GetOctets(),
null);
}
}
throw new Exception("algorithm identifier in private key not recognised");
}
}
}
|
