use of com.microsoft.schemas.office.x2006.encryption.CTKeyData in project poi by apache.
the class AgileEncryptor method createEncryptionDocument.
protected EncryptionDocument createEncryptionDocument() {
AgileEncryptionVerifier ver = (AgileEncryptionVerifier) getEncryptionInfo().getVerifier();
AgileEncryptionHeader header = (AgileEncryptionHeader) getEncryptionInfo().getHeader();
EncryptionDocument ed = EncryptionDocument.Factory.newInstance();
CTEncryption edRoot = ed.addNewEncryption();
CTKeyData keyData = edRoot.addNewKeyData();
CTKeyEncryptors keyEncList = edRoot.addNewKeyEncryptors();
CTKeyEncryptor keyEnc = keyEncList.addNewKeyEncryptor();
keyEnc.setUri(passwordUri);
CTPasswordKeyEncryptor keyPass = keyEnc.addNewEncryptedPasswordKey();
keyPass.setSpinCount(ver.getSpinCount());
keyData.setSaltSize(header.getBlockSize());
keyPass.setSaltSize(ver.getBlockSize());
keyData.setBlockSize(header.getBlockSize());
keyPass.setBlockSize(ver.getBlockSize());
keyData.setKeyBits(header.getKeySize());
keyPass.setKeyBits(ver.getKeySize());
keyData.setHashSize(header.getHashAlgorithm().hashSize);
keyPass.setHashSize(ver.getHashAlgorithm().hashSize);
// header and verifier have to have the same cipher algorithm
if (!header.getCipherAlgorithm().xmlId.equals(ver.getCipherAlgorithm().xmlId)) {
throw new EncryptedDocumentException("Cipher algorithm of header and verifier have to match");
}
STCipherAlgorithm.Enum xmlCipherAlgo = STCipherAlgorithm.Enum.forString(header.getCipherAlgorithm().xmlId);
if (xmlCipherAlgo == null) {
throw new EncryptedDocumentException("CipherAlgorithm " + header.getCipherAlgorithm() + " not supported.");
}
keyData.setCipherAlgorithm(xmlCipherAlgo);
keyPass.setCipherAlgorithm(xmlCipherAlgo);
switch(header.getChainingMode()) {
case cbc:
keyData.setCipherChaining(STCipherChaining.CHAINING_MODE_CBC);
keyPass.setCipherChaining(STCipherChaining.CHAINING_MODE_CBC);
break;
case cfb:
keyData.setCipherChaining(STCipherChaining.CHAINING_MODE_CFB);
keyPass.setCipherChaining(STCipherChaining.CHAINING_MODE_CFB);
break;
default:
throw new EncryptedDocumentException("ChainingMode " + header.getChainingMode() + " not supported.");
}
keyData.setHashAlgorithm(mapHashAlgorithm(header.getHashAlgorithm()));
keyPass.setHashAlgorithm(mapHashAlgorithm(ver.getHashAlgorithm()));
keyData.setSaltValue(header.getKeySalt());
keyPass.setSaltValue(ver.getSalt());
keyPass.setEncryptedVerifierHashInput(ver.getEncryptedVerifier());
keyPass.setEncryptedVerifierHashValue(ver.getEncryptedVerifierHash());
keyPass.setEncryptedKeyValue(ver.getEncryptedKey());
CTDataIntegrity hmacData = edRoot.addNewDataIntegrity();
hmacData.setEncryptedHmacKey(header.getEncryptedHmacKey());
hmacData.setEncryptedHmacValue(header.getEncryptedHmacValue());
for (AgileCertificateEntry ace : ver.getCertificates()) {
keyEnc = keyEncList.addNewKeyEncryptor();
keyEnc.setUri(certificateUri);
CTCertificateKeyEncryptor certData = keyEnc.addNewEncryptedCertificateKey();
try {
certData.setX509Certificate(ace.x509.getEncoded());
} catch (CertificateEncodingException e) {
throw new EncryptedDocumentException(e);
}
certData.setEncryptedKeyValue(ace.encryptedKey);
certData.setCertVerifier(ace.certVerifier);
}
return ed;
}
Aggregations