Example usage for org.bouncycastle.cms KeyTransRecipientId KeyTransRecipientId

Introduction

In this page you can find the example usage for org.bouncycastle.cms KeyTransRecipientId KeyTransRecipientId.

Prototype

public KeyTransRecipientId(byte[] subjectKeyId) 

Source Link

Document

Construct a key trans recipient ID with the value of a public key's subjectKeyId.

Usage

From source file:org.votingsystem.signature.util.Encryptor.java

License:Open Source License

public static byte[] decryptFile(byte[] encryptedFile, PublicKey publicKey, PrivateKey receiverPrivateKey)
        throws Exception {
    RecipientId recId = new KeyTransRecipientId(publicKey.getEncoded());
    Recipient recipient = new JceKeyTransEnvelopedRecipient(receiverPrivateKey).setProvider(ContextVS.PROVIDER);
    MimeMessage msg = new MimeMessage(null, new ByteArrayInputStream(encryptedFile));
    SMIMEEnveloped smimeEnveloped = new SMIMEEnveloped(msg);
    RecipientInformationStore recipients = smimeEnveloped.getRecipientInfos();
    RecipientInformation recipientInfo = null;
    recipientInfo = recipients.get(recId);
    if (recipientInfo == null && recipients.getRecipients().size() == 1) {
        recipientInfo = (RecipientInformation) recipients.getRecipients().iterator().next();
    }// ww  w. j a va 2s .  c o  m
    RecipientId fileRecipientId = null;
    if (recipientInfo.getRID() != null) {
        fileRecipientId = recipientInfo.getRID();
    }
    byte[] result = recipientInfo.getContent(recipient);
    return result;
}

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