diff options
Diffstat (limited to 'bcpkix/src/main/java/org/bouncycastle/cert/crmf/jcajce/JceAsymmetricValueDecryptorGenerator.java')
-rw-r--r-- | bcpkix/src/main/java/org/bouncycastle/cert/crmf/jcajce/JceAsymmetricValueDecryptorGenerator.java | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/bcpkix/src/main/java/org/bouncycastle/cert/crmf/jcajce/JceAsymmetricValueDecryptorGenerator.java b/bcpkix/src/main/java/org/bouncycastle/cert/crmf/jcajce/JceAsymmetricValueDecryptorGenerator.java deleted file mode 100644 index ff1158e..0000000 --- a/bcpkix/src/main/java/org/bouncycastle/cert/crmf/jcajce/JceAsymmetricValueDecryptorGenerator.java +++ /dev/null @@ -1,120 +0,0 @@ -package org.bouncycastle.cert.crmf.jcajce; - -import java.io.InputStream; -import java.security.GeneralSecurityException; -import java.security.InvalidKeyException; -import java.security.Key; -import java.security.PrivateKey; -import java.security.Provider; -import java.security.ProviderException; - -import javax.crypto.BadPaddingException; -import javax.crypto.Cipher; -import javax.crypto.CipherInputStream; -import javax.crypto.IllegalBlockSizeException; -import javax.crypto.spec.SecretKeySpec; - -import org.bouncycastle.asn1.x509.AlgorithmIdentifier; -import org.bouncycastle.cert.crmf.CRMFException; -import org.bouncycastle.cert.crmf.ValueDecryptorGenerator; -import org.bouncycastle.jcajce.util.DefaultJcaJceHelper; -import org.bouncycastle.jcajce.util.NamedJcaJceHelper; -import org.bouncycastle.jcajce.util.ProviderJcaJceHelper; -import org.bouncycastle.operator.InputDecryptor; - -public class JceAsymmetricValueDecryptorGenerator - implements ValueDecryptorGenerator -{ - private PrivateKey recipientKey; - private CRMFHelper helper = new CRMFHelper(new DefaultJcaJceHelper()); - - public JceAsymmetricValueDecryptorGenerator(PrivateKey recipientKey) - { - this.recipientKey = recipientKey; - } - - public JceAsymmetricValueDecryptorGenerator setProvider(Provider provider) - { - this.helper = new CRMFHelper(new ProviderJcaJceHelper(provider)); - - return this; - } - - public JceAsymmetricValueDecryptorGenerator setProvider(String providerName) - { - this.helper = new CRMFHelper(new NamedJcaJceHelper(providerName)); - - return this; - } - - private Key extractSecretKey(AlgorithmIdentifier keyEncryptionAlgorithm, AlgorithmIdentifier contentEncryptionAlgorithm, byte[] encryptedContentEncryptionKey) - throws CRMFException - { - try - { - Key sKey = null; - - Cipher keyCipher = helper.createCipher(keyEncryptionAlgorithm.getAlgorithm()); - - try - { - keyCipher.init(Cipher.UNWRAP_MODE, recipientKey); - sKey = keyCipher.unwrap(encryptedContentEncryptionKey, contentEncryptionAlgorithm.getAlgorithm().getId(), Cipher.SECRET_KEY); - } - catch (GeneralSecurityException e) - { - } - catch (IllegalStateException e) - { - } - catch (UnsupportedOperationException e) - { - } - catch (ProviderException e) - { - } - - // some providers do not support UNWRAP (this appears to be only for asymmetric algorithms) - if (sKey == null) - { - keyCipher.init(Cipher.DECRYPT_MODE, recipientKey); - sKey = new SecretKeySpec(keyCipher.doFinal(encryptedContentEncryptionKey), contentEncryptionAlgorithm.getAlgorithm().getId()); - } - - return sKey; - } - catch (InvalidKeyException e) - { - throw new CRMFException("key invalid in message.", e); - } - catch (IllegalBlockSizeException e) - { - throw new CRMFException("illegal blocksize in message.", e); - } - catch (BadPaddingException e) - { - throw new CRMFException("bad padding in message.", e); - } - } - - public InputDecryptor getValueDecryptor(AlgorithmIdentifier keyEncryptionAlgorithm, final AlgorithmIdentifier contentEncryptionAlgorithm, byte[] encryptedContentEncryptionKey) - throws CRMFException - { - Key secretKey = extractSecretKey(keyEncryptionAlgorithm, contentEncryptionAlgorithm, encryptedContentEncryptionKey); - - final Cipher dataCipher = helper.createContentCipher(secretKey, contentEncryptionAlgorithm); - - return new InputDecryptor() - { - public AlgorithmIdentifier getAlgorithmIdentifier() - { - return contentEncryptionAlgorithm; - } - - public InputStream getInputStream(InputStream dataIn) - { - return new CipherInputStream(dataIn, dataCipher); - } - }; - } -} |