public class EncryptedPrivateKeyInfo
extends java.lang.Object
EncryptedPrivateKeyInfo type
as defined in PKCS #8.
Its ASN.1 definition is as follows:
EncryptedPrivateKeyInfo ::= SEQUENCE {
encryptionAlgorithm AlgorithmIdentifier,
encryptedData OCTET STRING }
AlgorithmIdentifier ::= SEQUENCE {
algorithm OBJECT IDENTIFIER,
parameters ANY DEFINED BY algorithm OPTIONAL }
PKCS8EncodedKeySpec| Constructor and Description |
|---|
EncryptedPrivateKeyInfo(java.security.AlgorithmParameters algParams,
byte[] encryptedData)
Constructs an
EncryptedPrivateKeyInfo from the
encryption algorithm parameters and the encrypted data. |
EncryptedPrivateKeyInfo(byte[] encoded)
Constructs (i.e., parses) an
EncryptedPrivateKeyInfo from
its ASN.1 encoding. |
EncryptedPrivateKeyInfo(java.lang.String algName,
byte[] encryptedData)
Constructs an
EncryptedPrivateKeyInfo from the
encryption algorithm name and the encrypted data. |
| Modifier and Type | Method and Description |
|---|---|
java.lang.String |
getAlgName()
Returns the encryption algorithm.
|
java.security.AlgorithmParameters |
getAlgParameters()
Returns the algorithm parameters used by the encryption algorithm.
|
byte[] |
getEncoded()
Returns the ASN.1 encoding of this object.
|
byte[] |
getEncryptedData()
Returns the encrypted data.
|
java.security.spec.PKCS8EncodedKeySpec |
getKeySpec(javax.crypto.Cipher cipher)
Extract the enclosed PKCS8EncodedKeySpec object from the
encrypted data and return it.
|
java.security.spec.PKCS8EncodedKeySpec |
getKeySpec(java.security.Key decryptKey)
Extract the enclosed PKCS8EncodedKeySpec object from the
encrypted data and return it.
|
java.security.spec.PKCS8EncodedKeySpec |
getKeySpec(java.security.Key decryptKey,
java.security.Provider provider)
Extract the enclosed PKCS8EncodedKeySpec object from the
encrypted data and return it.
|
java.security.spec.PKCS8EncodedKeySpec |
getKeySpec(java.security.Key decryptKey,
java.lang.String providerName)
Extract the enclosed PKCS8EncodedKeySpec object from the
encrypted data and return it.
|
public EncryptedPrivateKeyInfo(byte[] encoded)
throws java.io.IOException
EncryptedPrivateKeyInfo from
its ASN.1 encoding.encoded - the ASN.1 encoding of this object. The contents of
the array are copied to protect against subsequent modification.java.lang.NullPointerException - if the encoded is null.java.io.IOException - if error occurs when parsing the ASN.1 encoding.public EncryptedPrivateKeyInfo(java.lang.String algName,
byte[] encryptedData)
throws java.security.NoSuchAlgorithmException
EncryptedPrivateKeyInfo from the
encryption algorithm name and the encrypted data.
Note: This constructor will use null as the value of the algorithm parameters. If the encryption algorithm has parameters whose value is not null, a different constructor, e.g. EncryptedPrivateKeyInfo(AlgorithmParameters, byte[]), should be used.
algName - encryption algorithm name. See Appendix A in the
Java Cryptography Architecture Reference Guide
for information about standard Cipher algorithm names.encryptedData - encrypted data. The contents of
encrypedData are copied to protect against subsequent
modification when constructing this object.java.lang.NullPointerException - if algName or
encryptedData is null.java.lang.IllegalArgumentException - if encryptedData
is empty, i.e. 0-length.java.security.NoSuchAlgorithmException - if the specified algName is
not supported.public EncryptedPrivateKeyInfo(java.security.AlgorithmParameters algParams,
byte[] encryptedData)
throws java.security.NoSuchAlgorithmException
EncryptedPrivateKeyInfo from the
encryption algorithm parameters and the encrypted data.algParams - the algorithm parameters for the encryption
algorithm. algParams.getEncoded() should return
the ASN.1 encoded bytes of the parameters field
of the AlgorithmIdentifer component of the
EncryptedPrivateKeyInfo type.encryptedData - encrypted data. The contents of
encrypedData are copied to protect against
subsequent modification when constructing this object.java.lang.NullPointerException - if algParams or
encryptedData is null.java.lang.IllegalArgumentException - if encryptedData
is empty, i.e. 0-length.java.security.NoSuchAlgorithmException - if the specified algName of
the specified algParams parameter is not supported.public java.lang.String getAlgName()
Note: Standard name is returned instead of the specified one in the constructor when such mapping is available. See Appendix A in the Java Cryptography Architecture Reference Guide for information about standard Cipher algorithm names.
public java.security.AlgorithmParameters getAlgParameters()
public byte[] getEncryptedData()
public java.security.spec.PKCS8EncodedKeySpec getKeySpec(javax.crypto.Cipher cipher)
throws java.security.spec.InvalidKeySpecException
cipher needs
to be initialized to either Cipher.DECRYPT_MODE or
Cipher.UNWRAP_MODE, with the same key and parameters used
for generating the encrypted data.cipher - the initialized cipher object which will be
used for decrypting the encrypted data.java.lang.NullPointerException - if cipher
is null.java.security.spec.InvalidKeySpecException - if the given cipher is
inappropriate for the encrypted data or the encrypted
data is corrupted and cannot be decrypted.public java.security.spec.PKCS8EncodedKeySpec getKeySpec(java.security.Key decryptKey)
throws java.security.NoSuchAlgorithmException,
java.security.InvalidKeyException
decryptKey - key used for decrypting the encrypted data.java.lang.NullPointerException - if decryptKey
is null.java.security.NoSuchAlgorithmException - if cannot find appropriate
cipher to decrypt the encrypted data.java.security.InvalidKeyException - if decryptKey
cannot be used to decrypt the encrypted data or the decryption
result is not a valid PKCS8KeySpec.public java.security.spec.PKCS8EncodedKeySpec getKeySpec(java.security.Key decryptKey,
java.lang.String providerName)
throws java.security.NoSuchProviderException,
java.security.NoSuchAlgorithmException,
java.security.InvalidKeyException
decryptKey - key used for decrypting the encrypted data.providerName - the name of provider whose Cipher
implementation will be used.java.lang.NullPointerException - if decryptKey
or providerName is null.java.security.NoSuchProviderException - if no provider
providerName is registered.java.security.NoSuchAlgorithmException - if cannot find appropriate
cipher to decrypt the encrypted data.java.security.InvalidKeyException - if decryptKey
cannot be used to decrypt the encrypted data or the decryption
result is not a valid PKCS8KeySpec.public java.security.spec.PKCS8EncodedKeySpec getKeySpec(java.security.Key decryptKey,
java.security.Provider provider)
throws java.security.NoSuchAlgorithmException,
java.security.InvalidKeyException
decryptKey - key used for decrypting the encrypted data.provider - the name of provider whose Cipher implementation
will be used.java.lang.NullPointerException - if decryptKey
or provider is null.java.security.NoSuchAlgorithmException - if cannot find appropriate
cipher to decrypt the encrypted data in provider.java.security.InvalidKeyException - if decryptKey
cannot be used to decrypt the encrypted data or the decryption
result is not a valid PKCS8KeySpec.public byte[] getEncoded()
throws java.io.IOException
java.io.IOException - if error occurs when constructing its
ASN.1 encoding.