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
|
package javax.crypto.spec;
import java.security.spec.AlgorithmParameterSpec;
/**
* This class specifies the set of parameters used with OAEP Padding, as defined
* in the PKCS #1 standard. Its ASN.1 definition in PKCS#1 standard is described
* below:
*
* </pre>
*
* RSAES-OAEP-params ::= SEQUENCE { hashAlgorithm [0] OAEP-PSSDigestAlgorithms
* DEFAULT sha1, maskGenAlgorithm [1] PKCS1MGFAlgorithms DEFAULT mgf1SHA1,
* pSourceAlgorithm [2] PKCS1PSourceAlgorithms DEFAULT pSpecifiedEmpty }
*
* </pre>
*
* where
*
* <pre>
*
* OAEP-PSSDigestAlgorithms ALGORITHM-IDENTIFIER ::= { { OID id-sha1 PARAMETERS
* NULL }| { OID id-sha256 PARAMETERS NULL }| { OID id-sha384 PARAMETERS NULL } | {
* OID id-sha512 PARAMETERS NULL }, ... -- Allows for future expansion -- }
* PKCS1MGFAlgorithms ALGORITHM-IDENTIFIER ::= { { OID id-mgf1 PARAMETERS
* OAEP-PSSDigestAlgorithms }, ... -- Allows for future expansion -- }
* PKCS1PSourceAlgorithms ALGORITHM-IDENTIFIER ::= { { OID id-pSpecified
* PARAMETERS OCTET STRING }, ... -- Allows for future expansion -- }
*
* </pre>
*
* @see PSource
*/
public class OAEPParameterSpec
implements AlgorithmParameterSpec
{
private String mdName;
private String mgfName;
private AlgorithmParameterSpec mgfSpec;
private PSource pSrc;
/**
* Constructs a parameter set for OAEP padding as defined in the PKCS #1
* standard using the specified message digest algorithm mdName, mask
* generation function algorithm mgfName, parameters for the mask generation
* function mgfSpec, and source of the encoding input P pSrc.
*
* @param mdName the algorithm name for the message digest.
* @param mgfName the algorithm name for the mask generation function.
* @param mgfSpec the parameters for the mask generation function. If null is
* specified, null will be returned by getMGFParameters().
* @param pSrc the source of the encoding input P.
* @throws NullPointerException if mdName, mgfName, or pSrc is null.
*/
public OAEPParameterSpec(String mdName, String mgfName,
AlgorithmParameterSpec mgfSpec, PSource pSrc)
{
this.mdName = mdName;
this.mgfName = mgfName;
this.mgfSpec = mgfSpec;
this.pSrc = pSrc;
}
/**
* Returns the message digest algorithm name.
*
* @return the message digest algorithm name.
*/
public String getDigestAlgorithm()
{
return mdName;
}
/**
* Returns the mask generation function algorithm name.
*
* @return the mask generation function algorithm name.
*/
public String getMGFAlgorithm()
{
return mgfName;
}
/**
* Returns the parameters for the mask generation function.
*
* @return the parameters for the mask generation function.
*/
public AlgorithmParameterSpec getMGFParameters()
{
return mgfSpec;
}
/**
* Returns the source of encoding input P.
*
* @return the source of encoding input P.
*/
public PSource getPSource()
{
return pSrc;
}
}
|
