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Class iaik.pkcs.RecipientInfo 

java.lang.Object
   |
   +----iaik.pkcs.RecipientInfo
public class RecipientInfo
extends Object
implements ASN1Type
This class implements the PKCS#7 RecipientInfo type. Typical use of this class:

Constructor Index

o RecipientInfo(ASN1Object)
Creates a RecipientInfo from an ASN1Object.
o RecipientInfo(IssuerAndSerialNumber, AlgorithmID, byte[])
o RecipientInfo(X509Certificate, AlgorithmID)
Creates a RecipientInfo object with a certificate and a key encryption algorithm.

Method Index

o decode(ASN1Object)
Decodes the RecipientInfo-ASN1Object.
o decryptKey(RSAPrivateKey)
Uses a RSAPrivateKey to decrypt the encrypted content-encryption key.
o encryptKey(Key)
Finishes the creation of a RecipientInfo object.
o getEncryptedKey()
o getIssuerAndSerialNumber()
o getKeyEncryptionAlgorithm()
o getVersion()
Returns the version of this RecipientInfo.
o toASN1Object()
o toString()
Returns a string that represents the contents of the extensions.

Constructors

o RecipientInfo 
 public RecipientInfo(IssuerAndSerialNumber issuer,
                      AlgorithmID keyEncAlg,
                      byte encryptedKey[])
o RecipientInfo 
 public RecipientInfo(X509Certificate cert,
                      AlgorithmID keyEncAlg)
Creates a RecipientInfo object with a certificate and a key encryption algorithm. The public key from certificate is used to encrypt the symmetric transport key with algorithm keyEncAlg. Finally a call to method @see encryptKey finishes the creation process.

Parameters:
cert - the certificate of the recipient
keyEncAlg - the algorithm used to encrypt symmetric key
o RecipientInfo 
 public RecipientInfo(ASN1Object obj) throws CodingException
Creates a RecipientInfo from an ASN1Object.

Parameters:
obj - the RecipientInfo as ASN1Object

Methods

o decode 
 public void decode(ASN1Object obj) throws CodingException
Decodes the RecipientInfo-ASN1Object.

Parameters:
obj - the RecipientInfo as ASN1Object
o toASN1Object 
 public ASN1Object toASN1Object()
o decryptKey 
 public Key decryptKey(RSAPrivateKey sk)
Uses a RSAPrivateKey to decrypt the encrypted content-encryption key.

Parameters:
sk - the RSAPrivateKey to decrypt the encrypted content-encryption key.
Returns:
the decrypted key as SecretKey in RAW format
o encryptKey 
 public void encryptKey(Key key) throws InvalidKeyException
Finishes the creation of a RecipientInfo object. The public key from certificate is used to encrypt the content-encryption key with algorithm keyEncAlg.

Parameters:
key - the symmetric key transport key for this recipient
o getVersion 
 public int getVersion()
Returns the version of this RecipientInfo.

Returns:
the version
o getIssuerAndSerialNumber 
 public IssuerAndSerialNumber getIssuerAndSerialNumber()
o getKeyEncryptionAlgorithm 
 public AlgorithmID getKeyEncryptionAlgorithm()
o getEncryptedKey 
 public byte[] getEncryptedKey()
o toString 
 public String toString()
Returns a string that represents the contents of the extensions.

Returns:
the string representation
Overrides:
toString in class Object 
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