org.spongycastle.asn1.pkcs

Class PBKDF2Params

java.lang.Object

org.spongycastle.asn1.ASN1Object

org.spongycastle.asn1.pkcs.PBKDF2Params

All Implemented Interfaces:

ASN1Encodable, Encodable

public class PBKDF2Params
extends ASN1Object

     PBKDF2-params ::= SEQUENCE {
               salt CHOICE {
                      specified OCTET STRING,
                      otherSource AlgorithmIdentifier {{PBKDF2-SaltSources}}
               },
              iterationCount INTEGER (1..MAX),
              keyLength INTEGER (1..MAX) OPTIONAL,
              prf AlgorithmIdentifier {{PBKDF2-PRFs}} DEFAULT algid-hmacWithSHA1 }
 

Constructor Summary

Constructors

Constructor and Description
PBKDF2Params(byte[] salt, int iterationCount) Create a PBKDF2Params with the specified salt, iteration count, and algid-hmacWithSHA1 for the prf.
PBKDF2Params(byte[] salt, int iterationCount, AlgorithmIdentifier prf) Create a PBKDF2Params with the specified salt, iteration count, and a defined prf.
PBKDF2Params(byte[] salt, int iterationCount, int keyLength) Create a PBKDF2Params with the specified salt, iteration count, keyLength, and algid-hmacWithSHA1 for the prf.
PBKDF2Params(byte[] salt, int iterationCount, int keyLength, AlgorithmIdentifier prf) Create a PBKDF2Params with the specified salt, iteration count, keyLength, and a defined prf.

Method Summary

Modifier and Type	Method and Description
static PBKDF2Params	getInstance(java.lang.Object obj) Create PBKDF2Params from the passed in object,
java.math.BigInteger	getIterationCount() Return the iteration count to use.
java.math.BigInteger	getKeyLength() Return the intended length in octets of the derived key.
AlgorithmIdentifier	getPrf() Return the algId of the underlying pseudo random function to use.
byte[]	getSalt() Return the salt to use.
boolean	isDefaultPrf() Return true if the PRF is the default (hmacWithSHA1)
ASN1Primitive	toASN1Primitive() Return an ASN.1 structure suitable for encoding.

Methods inherited from class org.spongycastle.asn1.ASN1Object

equals, getEncoded, getEncoded, hasEncodedTagValue, hashCode, toASN1Object

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PBKDF2Params

public PBKDF2Params(byte[] salt,
                    int iterationCount)

Create a PBKDF2Params with the specified salt, iteration count, and algid-hmacWithSHA1 for the prf.

Parameters:

salt - input salt.

iterationCount - input iteration count.

PBKDF2Params

public PBKDF2Params(byte[] salt,
                    int iterationCount,
                    int keyLength)

Create a PBKDF2Params with the specified salt, iteration count, keyLength, and algid-hmacWithSHA1 for the prf.

Parameters:

salt - input salt.

iterationCount - input iteration count.

keyLength - intended key length to be produced.

PBKDF2Params

public PBKDF2Params(byte[] salt,
                    int iterationCount,
                    int keyLength,
                    AlgorithmIdentifier prf)

Create a PBKDF2Params with the specified salt, iteration count, keyLength, and a defined prf.

Parameters:

salt - input salt.

iterationCount - input iteration count.

keyLength - intended key length to be produced.

prf - the pseudo-random function to use.

PBKDF2Params

public PBKDF2Params(byte[] salt,
                    int iterationCount,
                    AlgorithmIdentifier prf)

Create a PBKDF2Params with the specified salt, iteration count, and a defined prf.

Parameters:

salt - input salt.

iterationCount - input iteration count.

prf - the pseudo-random function to use.

Method Detail

getInstance

public static PBKDF2Params getInstance(java.lang.Object obj)

Create PBKDF2Params from the passed in object,

Parameters:

obj - either PBKDF2Params or an ASN1Sequence.

Returns:

a PBKDF2Params instance.

getSalt

public byte[] getSalt()

Return the salt to use.

Returns:

the input salt.

getIterationCount

public java.math.BigInteger getIterationCount()

Return the iteration count to use.

Returns:

the input iteration count.

getKeyLength

public java.math.BigInteger getKeyLength()

Return the intended length in octets of the derived key.

Returns:

length in octets for derived key, if specified.

isDefaultPrf

public boolean isDefaultPrf()

Return true if the PRF is the default (hmacWithSHA1)

Returns:

true if PRF is default, false otherwise.

getPrf

public AlgorithmIdentifier getPrf()

Return the algId of the underlying pseudo random function to use.

Returns:

the prf algorithm identifier.

toASN1Primitive

public ASN1Primitive toASN1Primitive()

Return an ASN.1 structure suitable for encoding.

Specified by:

toASN1Primitive in interface ASN1Encodable

Specified by:

toASN1Primitive in class ASN1Object

Returns:

the object as an ASN.1 encodable structure.