diff options
Diffstat (limited to 'libraries/spongycastle/pkix/src/main/java/org/spongycastle/cms/jcajce/JceKeyAgreeEnvelopedRecipient.java')
-rw-r--r-- | libraries/spongycastle/pkix/src/main/java/org/spongycastle/cms/jcajce/JceKeyAgreeEnvelopedRecipient.java | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/libraries/spongycastle/pkix/src/main/java/org/spongycastle/cms/jcajce/JceKeyAgreeEnvelopedRecipient.java b/libraries/spongycastle/pkix/src/main/java/org/spongycastle/cms/jcajce/JceKeyAgreeEnvelopedRecipient.java new file mode 100644 index 000000000..274d8ed9c --- /dev/null +++ b/libraries/spongycastle/pkix/src/main/java/org/spongycastle/cms/jcajce/JceKeyAgreeEnvelopedRecipient.java @@ -0,0 +1,45 @@ +package org.spongycastle.cms.jcajce; + +import java.io.InputStream; +import java.security.Key; +import java.security.PrivateKey; + +import javax.crypto.Cipher; +import javax.crypto.CipherInputStream; + +import org.spongycastle.asn1.ASN1OctetString; +import org.spongycastle.asn1.x509.AlgorithmIdentifier; +import org.spongycastle.asn1.x509.SubjectPublicKeyInfo; +import org.spongycastle.cms.CMSException; +import org.spongycastle.cms.RecipientOperator; +import org.spongycastle.operator.InputDecryptor; + +public class JceKeyAgreeEnvelopedRecipient + extends JceKeyAgreeRecipient +{ + public JceKeyAgreeEnvelopedRecipient(PrivateKey recipientKey) + { + super(recipientKey); + } + + public RecipientOperator getRecipientOperator(AlgorithmIdentifier keyEncryptionAlgorithm, final AlgorithmIdentifier contentEncryptionAlgorithm, SubjectPublicKeyInfo senderPublicKey, ASN1OctetString userKeyingMaterial, byte[] encryptedContentKey) + throws CMSException + { + Key secretKey = extractSecretKey(keyEncryptionAlgorithm, contentEncryptionAlgorithm, senderPublicKey, userKeyingMaterial, encryptedContentKey); + + final Cipher dataCipher = contentHelper.createContentCipher(secretKey, contentEncryptionAlgorithm); + + return new RecipientOperator(new InputDecryptor() + { + public AlgorithmIdentifier getAlgorithmIdentifier() + { + return contentEncryptionAlgorithm; + } + + public InputStream getInputStream(InputStream dataOut) + { + return new CipherInputStream(dataOut, dataCipher); + } + }); + } +} |