1package org.bouncycastle.cms; 2 3import java.util.HashSet; 4import java.util.Set; 5 6import org.bouncycastle.asn1.DERNull; 7import org.bouncycastle.asn1.oiw.OIWObjectIdentifiers; 8import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers; 9import org.bouncycastle.asn1.teletrust.TeleTrusTObjectIdentifiers; 10import org.bouncycastle.asn1.x509.AlgorithmIdentifier; 11 12public class DefaultCMSSignatureEncryptionAlgorithmFinder 13 implements CMSSignatureEncryptionAlgorithmFinder 14{ 15 private static final Set RSA_PKCS1d5 = new HashSet(); 16 17 static 18 { 19 // BEGIN android-removed 20 // RSA_PKCS1d5.add(PKCSObjectIdentifiers.md2WithRSAEncryption); 21 // RSA_PKCS1d5.add(PKCSObjectIdentifiers.md4WithRSAEncryption); 22 // END android-removed 23 RSA_PKCS1d5.add(PKCSObjectIdentifiers.md5WithRSAEncryption); 24 RSA_PKCS1d5.add(PKCSObjectIdentifiers.sha1WithRSAEncryption); 25 RSA_PKCS1d5.add(PKCSObjectIdentifiers.sha224WithRSAEncryption); 26 RSA_PKCS1d5.add(PKCSObjectIdentifiers.sha256WithRSAEncryption); 27 RSA_PKCS1d5.add(PKCSObjectIdentifiers.sha384WithRSAEncryption); 28 RSA_PKCS1d5.add(PKCSObjectIdentifiers.sha512WithRSAEncryption); 29 // BEGIN android-removed 30 // RSA_PKCS1d5.add(OIWObjectIdentifiers.md4WithRSAEncryption); 31 // RSA_PKCS1d5.add(OIWObjectIdentifiers.md4WithRSA); 32 // END android-removed 33 RSA_PKCS1d5.add(OIWObjectIdentifiers.md5WithRSA); 34 RSA_PKCS1d5.add(OIWObjectIdentifiers.sha1WithRSA); 35 // BEGIN android-removed 36 // RSA_PKCS1d5.add(TeleTrusTObjectIdentifiers.rsaSignatureWithripemd128); 37 // RSA_PKCS1d5.add(TeleTrusTObjectIdentifiers.rsaSignatureWithripemd160); 38 // RSA_PKCS1d5.add(TeleTrusTObjectIdentifiers.rsaSignatureWithripemd256); 39 // END android-removed 40 } 41 42 public AlgorithmIdentifier findEncryptionAlgorithm(AlgorithmIdentifier signatureAlgorithm) 43 { 44 // RFC3370 section 3.2 45 if (RSA_PKCS1d5.contains(signatureAlgorithm.getAlgorithm())) 46 { 47 return new AlgorithmIdentifier(PKCSObjectIdentifiers.rsaEncryption, DERNull.INSTANCE); 48 } 49 50 return signatureAlgorithm; 51 } 52} 53