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
|
using System;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.Pkcs;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Security;
namespace Org.BouncyCastle.Pkcs
{
public sealed class EncryptedPrivateKeyInfoFactory
{
private EncryptedPrivateKeyInfoFactory()
{
}
public static EncryptedPrivateKeyInfo CreateEncryptedPrivateKeyInfo(
DerObjectIdentifier algorithm,
char[] passPhrase,
byte[] salt,
int iterationCount,
AsymmetricKeyParameter key)
{
return CreateEncryptedPrivateKeyInfo(
algorithm.Id, passPhrase, salt, iterationCount,
PrivateKeyInfoFactory.CreatePrivateKeyInfo(key));
}
public static EncryptedPrivateKeyInfo CreateEncryptedPrivateKeyInfo(
string algorithm,
char[] passPhrase,
byte[] salt,
int iterationCount,
AsymmetricKeyParameter key)
{
return CreateEncryptedPrivateKeyInfo(
algorithm, passPhrase, salt, iterationCount,
PrivateKeyInfoFactory.CreatePrivateKeyInfo(key));
}
public static EncryptedPrivateKeyInfo CreateEncryptedPrivateKeyInfo(
string algorithm,
char[] passPhrase,
byte[] salt,
int iterationCount,
PrivateKeyInfo keyInfo)
{
IBufferedCipher cipher = PbeUtilities.CreateEngine(algorithm) as IBufferedCipher;
if (cipher == null)
throw new Exception("Unknown encryption algorithm: " + algorithm);
Asn1Encodable pbeParameters = PbeUtilities.GenerateAlgorithmParameters(
algorithm, salt, iterationCount);
ICipherParameters cipherParameters = PbeUtilities.GenerateCipherParameters(
algorithm, passPhrase, pbeParameters);
cipher.Init(true, cipherParameters);
byte[] encoding = cipher.DoFinal(keyInfo.GetEncoded());
DerObjectIdentifier oid = PbeUtilities.GetObjectIdentifier(algorithm);
AlgorithmIdentifier algID = new AlgorithmIdentifier(oid, pbeParameters);
return new EncryptedPrivateKeyInfo(algID, encoding);
}
public static EncryptedPrivateKeyInfo CreateEncryptedPrivateKeyInfo(
DerObjectIdentifier cipherAlgorithm,
DerObjectIdentifier prfAlgorithm,
char[] passPhrase,
byte[] salt,
int iterationCount,
SecureRandom random,
AsymmetricKeyParameter key)
{
return CreateEncryptedPrivateKeyInfo(
cipherAlgorithm, prfAlgorithm, passPhrase, salt, iterationCount, random,
PrivateKeyInfoFactory.CreatePrivateKeyInfo(key));
}
public static EncryptedPrivateKeyInfo CreateEncryptedPrivateKeyInfo(
DerObjectIdentifier cipherAlgorithm,
DerObjectIdentifier prfAlgorithm,
char[] passPhrase,
byte[] salt,
int iterationCount,
SecureRandom random,
PrivateKeyInfo keyInfo)
{
IBufferedCipher cipher = CipherUtilities.GetCipher(cipherAlgorithm) as IBufferedCipher;
if (cipher == null)
throw new Exception("Unknown encryption algorithm: " + cipherAlgorithm);
Asn1Encodable pbeParameters = PbeUtilities.GenerateAlgorithmParameters(
cipherAlgorithm, prfAlgorithm, salt, iterationCount, random);
ICipherParameters cipherParameters = PbeUtilities.GenerateCipherParameters(
PkcsObjectIdentifiers.IdPbeS2, passPhrase, pbeParameters);
cipher.Init(true, cipherParameters);
byte[] encoding = cipher.DoFinal(keyInfo.GetEncoded());
AlgorithmIdentifier algID = new AlgorithmIdentifier(PkcsObjectIdentifiers.IdPbeS2, pbeParameters);
return new EncryptedPrivateKeyInfo(algID, encoding);
}
}
}
|
