diff options
Diffstat (limited to 'libraries/spongycastle/pkix/src/main/java/org/spongycastle/cms/jcajce/JceKeyAgreeAuthenticatedRecipient.java')
-rw-r--r-- | libraries/spongycastle/pkix/src/main/java/org/spongycastle/cms/jcajce/JceKeyAgreeAuthenticatedRecipient.java | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/libraries/spongycastle/pkix/src/main/java/org/spongycastle/cms/jcajce/JceKeyAgreeAuthenticatedRecipient.java b/libraries/spongycastle/pkix/src/main/java/org/spongycastle/cms/jcajce/JceKeyAgreeAuthenticatedRecipient.java new file mode 100644 index 000000000..3186b561c --- /dev/null +++ b/libraries/spongycastle/pkix/src/main/java/org/spongycastle/cms/jcajce/JceKeyAgreeAuthenticatedRecipient.java @@ -0,0 +1,57 @@ +package org.spongycastle.cms.jcajce; + +import java.io.OutputStream; +import java.security.Key; +import java.security.PrivateKey; + +import javax.crypto.Mac; + +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.jcajce.io.MacOutputStream; +import org.spongycastle.operator.GenericKey; +import org.spongycastle.operator.MacCalculator; +import org.spongycastle.operator.jcajce.JceGenericKey; + +public class JceKeyAgreeAuthenticatedRecipient + extends JceKeyAgreeRecipient +{ + public JceKeyAgreeAuthenticatedRecipient(PrivateKey recipientKey) + { + super(recipientKey); + } + + public RecipientOperator getRecipientOperator(AlgorithmIdentifier keyEncryptionAlgorithm, final AlgorithmIdentifier contentMacAlgorithm, SubjectPublicKeyInfo senderPublicKey, ASN1OctetString userKeyingMaterial, byte[] encryptedContentKey) + throws CMSException + { + final Key secretKey = extractSecretKey(keyEncryptionAlgorithm, contentMacAlgorithm, senderPublicKey, userKeyingMaterial, encryptedContentKey); + + final Mac dataMac = contentHelper.createContentMac(secretKey, contentMacAlgorithm); + + return new RecipientOperator(new MacCalculator() + { + public AlgorithmIdentifier getAlgorithmIdentifier() + { + return contentMacAlgorithm; + } + + public GenericKey getKey() + { + return new JceGenericKey(contentMacAlgorithm, secretKey); + } + + public OutputStream getOutputStream() + { + return new MacOutputStream(dataMac); + } + + public byte[] getMac() + { + return dataMac.doFinal(); + } + }); + } +} |