EncryptedPrivateKeyInfo

java.lang.Object
- javax.crypto.EncryptedPrivateKeyInfo

public class EncryptedPrivateKeyInfo
extends Object

This class implements the 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  }

从以下版本开始:: 1.4
另请参阅:: PKCS8EncodedKeySpec

构造器概要

构造器
构造器	说明
`EncryptedPrivateKeyInfo(byte[] encoded)`	Constructs (i.e., parses) an `EncryptedPrivateKeyInfo` from its ASN.1 encoding.
`EncryptedPrivateKeyInfo(String algName, byte[] encryptedData)`	Constructs an `EncryptedPrivateKeyInfo` from the encryption algorithm name and the encrypted data.
`EncryptedPrivateKeyInfo(AlgorithmParameters algParams, byte[] encryptedData)`	Constructs an `EncryptedPrivateKeyInfo` from the encryption algorithm parameters and the encrypted data.

方法概要

所有方法实例方法具体方法
限定符和类型	方法	说明
`String`	`getAlgName()`	Returns the encryption algorithm.
`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.
`PKCS8EncodedKeySpec`	`getKeySpec(Key decryptKey)`	Extract the enclosed PKCS8EncodedKeySpec object from the encrypted data and return it.
`PKCS8EncodedKeySpec`	`getKeySpec(Key decryptKey, String providerName)`	Extract the enclosed PKCS8EncodedKeySpec object from the encrypted data and return it.
`PKCS8EncodedKeySpec`	`getKeySpec(Key decryptKey, Provider provider)`	Extract the enclosed PKCS8EncodedKeySpec object from the encrypted data and return it.
`PKCS8EncodedKeySpec`	`getKeySpec(Cipher cipher)`	Extract the enclosed PKCS8EncodedKeySpec object from the encrypted data and return it.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 构造器详细资料
  - EncryptedPrivateKeyInfo
```
public EncryptedPrivateKeyInfo(byte[] encoded)
                        throws IOException
```
    Constructs (i.e., parses) an EncryptedPrivateKeyInfo from its ASN.1 encoding.
    
    参数:
    
    encoded - the ASN.1 encoding of this object. The contents of the array are copied to protect against subsequent modification.
    
    抛出:
    
    NullPointerException - if the encoded is null.
    
    IOException - if error occurs when parsing the ASN.1 encoding.
  - EncryptedPrivateKeyInfo
```
public EncryptedPrivateKeyInfo(String algName,
                               byte[] encryptedData)
                        throws NoSuchAlgorithmException
```
    Constructs an 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.
    
    参数:
    
    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.
    
    抛出:
    
    NullPointerException - if algName or encryptedData is null.
    
    IllegalArgumentException - if encryptedData is empty, i.e. 0-length.
    
    NoSuchAlgorithmException - if the specified algName is not supported.
  - EncryptedPrivateKeyInfo
```
public EncryptedPrivateKeyInfo(AlgorithmParameters algParams,
                               byte[] encryptedData)
                        throws NoSuchAlgorithmException
```
    Constructs an EncryptedPrivateKeyInfo from the encryption algorithm parameters and the encrypted data.
    
    参数:
    
    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.
    
    抛出:
    
    NullPointerException - if algParams or encryptedData is null.
    
    IllegalArgumentException - if encryptedData is empty, i.e. 0-length.
    
    NoSuchAlgorithmException - if the specified algName of the specified algParams parameter is not supported.
- 方法详细资料
  - getAlgName
```
public String getAlgName()
```
    Returns the encryption algorithm.
    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.
    
    返回:
    
    the encryption algorithm name.
  - getAlgParameters
```
public AlgorithmParameters getAlgParameters()
```
    Returns the algorithm parameters used by the encryption algorithm.
    
    返回:
    
    the algorithm parameters.
  - getEncryptedData
```
public byte[] getEncryptedData()
```
    Returns the encrypted data.
    
    返回:
    
    the encrypted data. Returns a new array each time this method is called.
  - getKeySpec
```
public PKCS8EncodedKeySpec getKeySpec(Cipher cipher)
                               throws InvalidKeySpecException
```
    Extract the enclosed PKCS8EncodedKeySpec object from the encrypted data and return it.
    Note: In order to successfully retrieve the enclosed PKCS8EncodedKeySpec object, 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.
    
    参数:
    
    cipher - the initialized cipher object which will be used for decrypting the encrypted data.
    
    返回:
    
    the PKCS8EncodedKeySpec object.
    
    抛出:
    
    NullPointerException - if cipher is null.
    
    InvalidKeySpecException - if the given cipher is inappropriate for the encrypted data or the encrypted data is corrupted and cannot be decrypted.
  - getKeySpec
```
public PKCS8EncodedKeySpec getKeySpec(Key decryptKey)
                               throws InvalidKeyException,
                                      NoSuchAlgorithmException
```
    Extract the enclosed PKCS8EncodedKeySpec object from the encrypted data and return it.
    
    参数:
    
    decryptKey - key used for decrypting the encrypted data.
    
    返回:
    
    the PKCS8EncodedKeySpec object.
    
    抛出:
    
    NullPointerException - if decryptKey is null.
    
    NoSuchAlgorithmException - if cannot find appropriate cipher to decrypt the encrypted data.
    
    InvalidKeyException - if decryptKey cannot be used to decrypt the encrypted data or the decryption result is not a valid PKCS8KeySpec.
    
    从以下版本开始:
    
    1.5
  - getKeySpec
```
public PKCS8EncodedKeySpec getKeySpec(Key decryptKey,
                                      String providerName)
                               throws InvalidKeyException,
                                      NoSuchAlgorithmException,
                                      NoSuchProviderException
```
    Extract the enclosed PKCS8EncodedKeySpec object from the encrypted data and return it.
    
    参数:
    
    decryptKey - key used for decrypting the encrypted data.
    
    providerName - the name of provider whose Cipher implementation will be used.
    
    返回:
    
    the PKCS8EncodedKeySpec object.
    
    抛出:
    
    NullPointerException - if decryptKey or providerName is null.
    
    NoSuchProviderException - if no provider providerName is registered.
    
    NoSuchAlgorithmException - if cannot find appropriate cipher to decrypt the encrypted data.
    
    InvalidKeyException - if decryptKey cannot be used to decrypt the encrypted data or the decryption result is not a valid PKCS8KeySpec.
    
    从以下版本开始:
    
    1.5
  - getKeySpec
```
public PKCS8EncodedKeySpec getKeySpec(Key decryptKey,
                                      Provider provider)
                               throws InvalidKeyException,
                                      NoSuchAlgorithmException
```
    Extract the enclosed PKCS8EncodedKeySpec object from the encrypted data and return it.
    
    参数:
    
    decryptKey - key used for decrypting the encrypted data.
    
    provider - the name of provider whose Cipher implementation will be used.
    
    返回:
    
    the PKCS8EncodedKeySpec object.
    
    抛出:
    
    NullPointerException - if decryptKey or provider is null.
    
    NoSuchAlgorithmException - if cannot find appropriate cipher to decrypt the encrypted data in provider.
    
    InvalidKeyException - if decryptKey cannot be used to decrypt the encrypted data or the decryption result is not a valid PKCS8KeySpec.
    
    从以下版本开始:
    
    1.5
  - getEncoded
```
public byte[] getEncoded()
                  throws IOException
```
    Returns the ASN.1 encoding of this object.
    
    返回:
    
    the ASN.1 encoding. Returns a new array each time this method is called.
    
    抛出:
    
    IOException - if error occurs when constructing its ASN.1 encoding.

类 EncryptedPrivateKeyInfo

构造器概要

方法概要

从类继承的方法 java.lang.Object

构造器详细资料

EncryptedPrivateKeyInfo

EncryptedPrivateKeyInfo

EncryptedPrivateKeyInfo

方法详细资料

getAlgName

getAlgParameters

getEncryptedData

getKeySpec

getKeySpec

getKeySpec

getKeySpec

getEncoded