Examples of codec.pkcs7.EncryptedContentInfo

codec.pkcs7.EnvelopedData
sa.com/rsalabs/pubs/PKCS/html/pkcs-7.html"> PKCS#7. The ASN.1 definition of this structure is
```
 EncryptedContentInfo ::= SEQUENCE { contentType ContentType, contentEncryptionAlgorithm ContentEncryptionAlgorithmIdentifier, encryptedContent [0] IMPLICIT EncryptedContent OPTIONAL } EncryptedContent ::= OCTET STRING ContentEncryptionAlgorithmIdentifier ::= AlgorithmIdentifier 
```
contentType indicates the type of content embedded in the EncryptedContent. The encryptedContent is optional; if it is not included in this structure then it must be provided by other means (such as a detached file).
PKCS#7 specifies six content types, of which five are supported: {@link Data data}, {@link SignedData signedData}, {@link EnvelopedData envelopedData}, {@link SignedAndEnvelopedData signedAndEnvelopedData}, and {@link EncryptedData encryptedData}. All of these content types have registered OIDs.
@author Volker Roth @author Markus Tak @version "$Id: EncryptedContentInfo.java,v 1.9 2007/08/30 08:45:05 pebingerExp $"

      throws IOException, ASN1Exception, GeneralSecurityException {
  // byte[] encodedData;
  ByteArrayInputStream bais;
  PBEKeySpec pbeSpec = null;
  byte[] data = null;
  EncryptedData encData = null;


  if (((ContentInfo) this.get(i)).getContent() instanceof EncryptedData) {
      encData = (EncryptedData) ((ContentInfo) this.get(i)).getContent();
  } else {
      System.out
        .println("This bag is public-key protected or not protected at all.");
      return null;
  }
  // "PbeWithSHAAnd40BitRC2_CBC";
  String algName = encData.getAlgorithm();


  // Create the PBEBMPKey ;
  pbeSpec = new PBEKeySpec(passwd);
  SecretKeyFactory skf = null;
  skf = SecretKeyFactory.getInstance(algName);
  SecretKey pbeKey = skf.generateSecret(pbeSpec);
  encData.init(pbeKey);
  data = encData.getData();
  bais = new ByteArrayInputStream(data);
  SafeContents safe = new SafeContents();
  BERDecoder decoder = new BERDecoder(bais);
  safe.decode(decoder);
  bais.close();

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  SecretKey pbekey = skf.generateSecret(pbeSpec);


  // System.out.println("The pbe key for encrypting");
  // System.out.println(new ASN1OctetString(pbekey.getEncoded()));
  // make an EncryptedData and put it in a ContentInfo
  EncryptedData ecd = new EncryptedData(algorithm, pbekey, params);
  ecd.setData(bais);
  bais.close();


  ContentInfo cinfo = new ContentInfo();
  cinfo.setContent(new codec.asn1.ASN1ObjectIdentifier(
    "1.2.840.113549.1.7.6"), ecd);

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      java.security.cert.X509Certificate cert) throws IOException,
      ASN1Exception, GeneralSecurityException, NoSuchElementException {
  ByteArrayInputStream bais;


  ContentInfo cinfo = (ContentInfo) this.get(i);
  EnvelopedData envData = null;
  if (cinfo.getContent() instanceof EnvelopedData) {
      envData = (EnvelopedData) cinfo.getContent();
  } else {
      System.out
        .println("This bag is password protected or not protected at all.");
      return null;
  }


  envData.init(cert, key);
  byte[] data = envData.getData();


  bais = new ByteArrayInputStream(data);
  SafeContents safe = new SafeContents();
  BERDecoder decoder = new BERDecoder(bais);
  safe.decode(decoder);

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  safe.encode(encoder);
  bais = new ByteArrayInputStream(baos.toByteArray());
  baos.close();


  // Make an envelopedData and put it in a ContentInfo
  EnvelopedData edata = new EnvelopedData(key, algorithm, params);
  edata.setData(bais);
  bais.close();
  for (int i = 0; i < cert.length; i++) {
      edata.addRecipient(cert[i]);
  }


  ContentInfo cinfo = new ContentInfo(edata);
  return cinfo;
    }

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Related Classes of codec.pkcs7.EncryptedContentInfo

codec.asn1.ASN1Integer

codec.asn1.ASN1Null

codec.asn1.ASN1ObjectIdentifier

codec.asn1.ASN1OctetString

codec.asn1.ASN1Opaque

codec.asn1.ASN1OpenType

codec.asn1.ASN1Sequence

codec.asn1.ASN1Set

codec.asn1.ASN1SetOf

codec.asn1.ASN1TaggedType

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