diff options
Diffstat (limited to 'pkix/src/main/java/org/spongycastle/cms/jcajce/EnvelopedDataHelper.java')
| -rw-r--r-- | pkix/src/main/java/org/spongycastle/cms/jcajce/EnvelopedDataHelper.java | 668 |
1 files changed, 668 insertions, 0 deletions
diff --git a/pkix/src/main/java/org/spongycastle/cms/jcajce/EnvelopedDataHelper.java b/pkix/src/main/java/org/spongycastle/cms/jcajce/EnvelopedDataHelper.java new file mode 100644 index 00000000..93de500e --- /dev/null +++ b/pkix/src/main/java/org/spongycastle/cms/jcajce/EnvelopedDataHelper.java @@ -0,0 +1,668 @@ +package org.spongycastle.cms.jcajce; + +import java.security.AlgorithmParameterGenerator; +import java.security.AlgorithmParameters; +import java.security.GeneralSecurityException; +import java.security.InvalidAlgorithmParameterException; +import java.security.InvalidKeyException; +import java.security.Key; +import java.security.KeyFactory; +import java.security.KeyPairGenerator; +import java.security.NoSuchAlgorithmException; +import java.security.NoSuchProviderException; +import java.security.PrivateKey; +import java.security.SecureRandom; +import java.security.spec.AlgorithmParameterSpec; +import java.security.spec.InvalidParameterSpecException; +import java.util.HashMap; +import java.util.Map; + +import javax.crypto.Cipher; +import javax.crypto.KeyAgreement; +import javax.crypto.KeyGenerator; +import javax.crypto.Mac; +import javax.crypto.NoSuchPaddingException; +import javax.crypto.SecretKey; +import javax.crypto.spec.IvParameterSpec; +import javax.crypto.spec.RC2ParameterSpec; +import javax.crypto.spec.SecretKeySpec; + +import org.spongycastle.asn1.ASN1Encodable; +import org.spongycastle.asn1.ASN1Null; +import org.spongycastle.asn1.ASN1ObjectIdentifier; +import org.spongycastle.asn1.ASN1OctetString; +import org.spongycastle.asn1.DERNull; +import org.spongycastle.asn1.DEROctetString; +import org.spongycastle.asn1.pkcs.PKCSObjectIdentifiers; +import org.spongycastle.asn1.pkcs.RC2CBCParameter; +import org.spongycastle.asn1.x509.AlgorithmIdentifier; +import org.spongycastle.cms.CMSAlgorithm; +import org.spongycastle.cms.CMSEnvelopedDataGenerator; +import org.spongycastle.cms.CMSException; +import org.spongycastle.operator.DefaultSecretKeySizeProvider; +import org.spongycastle.operator.GenericKey; +import org.spongycastle.operator.SecretKeySizeProvider; +import org.spongycastle.operator.SymmetricKeyUnwrapper; +import org.spongycastle.operator.jcajce.JceAsymmetricKeyUnwrapper; + +public class EnvelopedDataHelper +{ + protected static final SecretKeySizeProvider KEY_SIZE_PROVIDER = DefaultSecretKeySizeProvider.INSTANCE; + + protected static final Map BASE_CIPHER_NAMES = new HashMap(); + protected static final Map CIPHER_ALG_NAMES = new HashMap(); + protected static final Map MAC_ALG_NAMES = new HashMap(); + + static + { + BASE_CIPHER_NAMES.put(CMSAlgorithm.DES_CBC, "DES"); + BASE_CIPHER_NAMES.put(CMSAlgorithm.DES_EDE3_CBC, "DESEDE"); + BASE_CIPHER_NAMES.put(CMSAlgorithm.AES128_CBC, "AES"); + BASE_CIPHER_NAMES.put(CMSAlgorithm.AES192_CBC, "AES"); + BASE_CIPHER_NAMES.put(CMSAlgorithm.AES256_CBC, "AES"); + BASE_CIPHER_NAMES.put(CMSAlgorithm.RC2_CBC, "RC2"); + BASE_CIPHER_NAMES.put(CMSAlgorithm.CAST5_CBC, "CAST5"); + BASE_CIPHER_NAMES.put(CMSAlgorithm.CAMELLIA128_CBC, "Camellia"); + BASE_CIPHER_NAMES.put(CMSAlgorithm.CAMELLIA192_CBC, "Camellia"); + BASE_CIPHER_NAMES.put(CMSAlgorithm.CAMELLIA256_CBC, "Camellia"); + BASE_CIPHER_NAMES.put(CMSAlgorithm.SEED_CBC, "SEED"); + BASE_CIPHER_NAMES.put(PKCSObjectIdentifiers.rc4, "RC4"); + + CIPHER_ALG_NAMES.put(CMSAlgorithm.DES_CBC, "DES/CBC/PKCS5Padding"); + CIPHER_ALG_NAMES.put(CMSAlgorithm.RC2_CBC, "RC2/CBC/PKCS5Padding"); + CIPHER_ALG_NAMES.put(CMSAlgorithm.DES_EDE3_CBC, "DESEDE/CBC/PKCS5Padding"); + CIPHER_ALG_NAMES.put(CMSAlgorithm.AES128_CBC, "AES/CBC/PKCS5Padding"); + CIPHER_ALG_NAMES.put(CMSAlgorithm.AES192_CBC, "AES/CBC/PKCS5Padding"); + CIPHER_ALG_NAMES.put(CMSAlgorithm.AES256_CBC, "AES/CBC/PKCS5Padding"); + CIPHER_ALG_NAMES.put(PKCSObjectIdentifiers.rsaEncryption, "RSA/ECB/PKCS1Padding"); + CIPHER_ALG_NAMES.put(CMSAlgorithm.CAST5_CBC, "CAST5/CBC/PKCS5Padding"); + CIPHER_ALG_NAMES.put(CMSAlgorithm.CAMELLIA128_CBC, "Camellia/CBC/PKCS5Padding"); + CIPHER_ALG_NAMES.put(CMSAlgorithm.CAMELLIA192_CBC, "Camellia/CBC/PKCS5Padding"); + CIPHER_ALG_NAMES.put(CMSAlgorithm.CAMELLIA256_CBC, "Camellia/CBC/PKCS5Padding"); + CIPHER_ALG_NAMES.put(CMSAlgorithm.SEED_CBC, "SEED/CBC/PKCS5Padding"); + CIPHER_ALG_NAMES.put(PKCSObjectIdentifiers.rc4, "RC4"); + + MAC_ALG_NAMES.put(CMSAlgorithm.DES_EDE3_CBC, "DESEDEMac"); + MAC_ALG_NAMES.put(CMSAlgorithm.AES128_CBC, "AESMac"); + MAC_ALG_NAMES.put(CMSAlgorithm.AES192_CBC, "AESMac"); + MAC_ALG_NAMES.put(CMSAlgorithm.AES256_CBC, "AESMac"); + MAC_ALG_NAMES.put(CMSAlgorithm.RC2_CBC, "RC2Mac"); + } + + private static final short[] rc2Table = { + 0xbd, 0x56, 0xea, 0xf2, 0xa2, 0xf1, 0xac, 0x2a, 0xb0, 0x93, 0xd1, 0x9c, 0x1b, 0x33, 0xfd, 0xd0, + 0x30, 0x04, 0xb6, 0xdc, 0x7d, 0xdf, 0x32, 0x4b, 0xf7, 0xcb, 0x45, 0x9b, 0x31, 0xbb, 0x21, 0x5a, + 0x41, 0x9f, 0xe1, 0xd9, 0x4a, 0x4d, 0x9e, 0xda, 0xa0, 0x68, 0x2c, 0xc3, 0x27, 0x5f, 0x80, 0x36, + 0x3e, 0xee, 0xfb, 0x95, 0x1a, 0xfe, 0xce, 0xa8, 0x34, 0xa9, 0x13, 0xf0, 0xa6, 0x3f, 0xd8, 0x0c, + 0x78, 0x24, 0xaf, 0x23, 0x52, 0xc1, 0x67, 0x17, 0xf5, 0x66, 0x90, 0xe7, 0xe8, 0x07, 0xb8, 0x60, + 0x48, 0xe6, 0x1e, 0x53, 0xf3, 0x92, 0xa4, 0x72, 0x8c, 0x08, 0x15, 0x6e, 0x86, 0x00, 0x84, 0xfa, + 0xf4, 0x7f, 0x8a, 0x42, 0x19, 0xf6, 0xdb, 0xcd, 0x14, 0x8d, 0x50, 0x12, 0xba, 0x3c, 0x06, 0x4e, + 0xec, 0xb3, 0x35, 0x11, 0xa1, 0x88, 0x8e, 0x2b, 0x94, 0x99, 0xb7, 0x71, 0x74, 0xd3, 0xe4, 0xbf, + 0x3a, 0xde, 0x96, 0x0e, 0xbc, 0x0a, 0xed, 0x77, 0xfc, 0x37, 0x6b, 0x03, 0x79, 0x89, 0x62, 0xc6, + 0xd7, 0xc0, 0xd2, 0x7c, 0x6a, 0x8b, 0x22, 0xa3, 0x5b, 0x05, 0x5d, 0x02, 0x75, 0xd5, 0x61, 0xe3, + 0x18, 0x8f, 0x55, 0x51, 0xad, 0x1f, 0x0b, 0x5e, 0x85, 0xe5, 0xc2, 0x57, 0x63, 0xca, 0x3d, 0x6c, + 0xb4, 0xc5, 0xcc, 0x70, 0xb2, 0x91, 0x59, 0x0d, 0x47, 0x20, 0xc8, 0x4f, 0x58, 0xe0, 0x01, 0xe2, + 0x16, 0x38, 0xc4, 0x6f, 0x3b, 0x0f, 0x65, 0x46, 0xbe, 0x7e, 0x2d, 0x7b, 0x82, 0xf9, 0x40, 0xb5, + 0x1d, 0x73, 0xf8, 0xeb, 0x26, 0xc7, 0x87, 0x97, 0x25, 0x54, 0xb1, 0x28, 0xaa, 0x98, 0x9d, 0xa5, + 0x64, 0x6d, 0x7a, 0xd4, 0x10, 0x81, 0x44, 0xef, 0x49, 0xd6, 0xae, 0x2e, 0xdd, 0x76, 0x5c, 0x2f, + 0xa7, 0x1c, 0xc9, 0x09, 0x69, 0x9a, 0x83, 0xcf, 0x29, 0x39, 0xb9, 0xe9, 0x4c, 0xff, 0x43, 0xab + }; + + private static final short[] rc2Ekb = { + 0x5d, 0xbe, 0x9b, 0x8b, 0x11, 0x99, 0x6e, 0x4d, 0x59, 0xf3, 0x85, 0xa6, 0x3f, 0xb7, 0x83, 0xc5, + 0xe4, 0x73, 0x6b, 0x3a, 0x68, 0x5a, 0xc0, 0x47, 0xa0, 0x64, 0x34, 0x0c, 0xf1, 0xd0, 0x52, 0xa5, + 0xb9, 0x1e, 0x96, 0x43, 0x41, 0xd8, 0xd4, 0x2c, 0xdb, 0xf8, 0x07, 0x77, 0x2a, 0xca, 0xeb, 0xef, + 0x10, 0x1c, 0x16, 0x0d, 0x38, 0x72, 0x2f, 0x89, 0xc1, 0xf9, 0x80, 0xc4, 0x6d, 0xae, 0x30, 0x3d, + 0xce, 0x20, 0x63, 0xfe, 0xe6, 0x1a, 0xc7, 0xb8, 0x50, 0xe8, 0x24, 0x17, 0xfc, 0x25, 0x6f, 0xbb, + 0x6a, 0xa3, 0x44, 0x53, 0xd9, 0xa2, 0x01, 0xab, 0xbc, 0xb6, 0x1f, 0x98, 0xee, 0x9a, 0xa7, 0x2d, + 0x4f, 0x9e, 0x8e, 0xac, 0xe0, 0xc6, 0x49, 0x46, 0x29, 0xf4, 0x94, 0x8a, 0xaf, 0xe1, 0x5b, 0xc3, + 0xb3, 0x7b, 0x57, 0xd1, 0x7c, 0x9c, 0xed, 0x87, 0x40, 0x8c, 0xe2, 0xcb, 0x93, 0x14, 0xc9, 0x61, + 0x2e, 0xe5, 0xcc, 0xf6, 0x5e, 0xa8, 0x5c, 0xd6, 0x75, 0x8d, 0x62, 0x95, 0x58, 0x69, 0x76, 0xa1, + 0x4a, 0xb5, 0x55, 0x09, 0x78, 0x33, 0x82, 0xd7, 0xdd, 0x79, 0xf5, 0x1b, 0x0b, 0xde, 0x26, 0x21, + 0x28, 0x74, 0x04, 0x97, 0x56, 0xdf, 0x3c, 0xf0, 0x37, 0x39, 0xdc, 0xff, 0x06, 0xa4, 0xea, 0x42, + 0x08, 0xda, 0xb4, 0x71, 0xb0, 0xcf, 0x12, 0x7a, 0x4e, 0xfa, 0x6c, 0x1d, 0x84, 0x00, 0xc8, 0x7f, + 0x91, 0x45, 0xaa, 0x2b, 0xc2, 0xb1, 0x8f, 0xd5, 0xba, 0xf2, 0xad, 0x19, 0xb2, 0x67, 0x36, 0xf7, + 0x0f, 0x0a, 0x92, 0x7d, 0xe3, 0x9d, 0xe9, 0x90, 0x3e, 0x23, 0x27, 0x66, 0x13, 0xec, 0x81, 0x15, + 0xbd, 0x22, 0xbf, 0x9f, 0x7e, 0xa9, 0x51, 0x4b, 0x4c, 0xfb, 0x02, 0xd3, 0x70, 0x86, 0x31, 0xe7, + 0x3b, 0x05, 0x03, 0x54, 0x60, 0x48, 0x65, 0x18, 0xd2, 0xcd, 0x5f, 0x32, 0x88, 0x0e, 0x35, 0xfd + }; + + private JcaJceExtHelper helper; + + EnvelopedDataHelper(JcaJceExtHelper helper) + { + this.helper = helper; + } + + String getBaseCipherName(ASN1ObjectIdentifier algorithm) + { + String name = (String)BASE_CIPHER_NAMES.get(algorithm); + + if (name == null) + { + return algorithm.getId(); + } + + return name; + } + + Key getJceKey(GenericKey key) + { + if (key.getRepresentation() instanceof Key) + { + return (Key)key.getRepresentation(); + } + + if (key.getRepresentation() instanceof byte[]) + { + return new SecretKeySpec((byte[])key.getRepresentation(), "ENC"); + } + + throw new IllegalArgumentException("unknown generic key type"); + } + + public Key getJceKey(ASN1ObjectIdentifier algorithm, GenericKey key) + { + if (key.getRepresentation() instanceof Key) + { + return (Key)key.getRepresentation(); + } + + if (key.getRepresentation() instanceof byte[]) + { + return new SecretKeySpec((byte[])key.getRepresentation(), getBaseCipherName(algorithm)); + } + + throw new IllegalArgumentException("unknown generic key type"); + } + + public void keySizeCheck(AlgorithmIdentifier keyAlgorithm, Key key) + throws CMSException + { + int expectedKeySize = EnvelopedDataHelper.KEY_SIZE_PROVIDER.getKeySize(keyAlgorithm); + if (expectedKeySize > 0) + { + byte[] keyEnc = null; + + try + { + keyEnc = key.getEncoded(); + } + catch (Exception e) + { + // ignore - we're using a HSM... + } + + if (keyEnc != null) + { + if (keyEnc.length * 8 != expectedKeySize) + { + throw new CMSException("Expected key size for algorithm OID not found in recipient."); + } + } + } + } + + Cipher createCipher(ASN1ObjectIdentifier algorithm) + throws CMSException + { + try + { + String cipherName = (String)CIPHER_ALG_NAMES.get(algorithm); + + if (cipherName != null) + { + try + { + // this is reversed as the Sun policy files now allow unlimited strength RSA + return helper.createCipher(cipherName); + } + catch (NoSuchAlgorithmException e) + { + // Ignore + } + } + return helper.createCipher(algorithm.getId()); + } + catch (GeneralSecurityException e) + { + throw new CMSException("cannot create cipher: " + e.getMessage(), e); + } + } + + Mac createMac(ASN1ObjectIdentifier algorithm) + throws CMSException + { + try + { + String macName = (String)MAC_ALG_NAMES.get(algorithm); + + if (macName != null) + { + try + { + // this is reversed as the Sun policy files now allow unlimited strength RSA + return helper.createMac(macName); + } + catch (NoSuchAlgorithmException e) + { + // Ignore + } + } + return helper.createMac(algorithm.getId()); + } + catch (GeneralSecurityException e) + { + throw new CMSException("cannot create mac: " + e.getMessage(), e); + } + } + + Cipher createRFC3211Wrapper(ASN1ObjectIdentifier algorithm) + throws CMSException + { + String cipherName = (String)BASE_CIPHER_NAMES.get(algorithm); + + if (cipherName == null) + { + throw new CMSException("no name for " + algorithm); + } + + cipherName += "RFC3211Wrap"; + + try + { + return helper.createCipher(cipherName); + } + catch (GeneralSecurityException e) + { + throw new CMSException("cannot create cipher: " + e.getMessage(), e); + } + } + + KeyAgreement createKeyAgreement(ASN1ObjectIdentifier algorithm) + throws CMSException + { + try + { + String agreementName = (String)BASE_CIPHER_NAMES.get(algorithm); + + if (agreementName != null) + { + try + { + // this is reversed as the Sun policy files now allow unlimited strength RSA + return helper.createKeyAgreement(agreementName); + } + catch (NoSuchAlgorithmException e) + { + // Ignore + } + } + return helper.createKeyAgreement(algorithm.getId()); + } + catch (GeneralSecurityException e) + { + throw new CMSException("cannot create key pair generator: " + e.getMessage(), e); + } + } + + AlgorithmParameterGenerator createAlgorithmParameterGenerator(ASN1ObjectIdentifier algorithm) + throws GeneralSecurityException + { + String algorithmName = (String)BASE_CIPHER_NAMES.get(algorithm); + + if (algorithmName != null) + { + try + { + // this is reversed as the Sun policy files now allow unlimited strength RSA + return helper.createAlgorithmParameterGenerator(algorithmName); + } + catch (NoSuchAlgorithmException e) + { + // Ignore + } + } + return helper.createAlgorithmParameterGenerator(algorithm.getId()); + } + + public Cipher createContentCipher(final Key sKey, final AlgorithmIdentifier encryptionAlgID) + throws CMSException + { + return (Cipher)execute(new JCECallback() + { + public Object doInJCE() + throws CMSException, InvalidAlgorithmParameterException, + InvalidKeyException, InvalidParameterSpecException, NoSuchAlgorithmException, + NoSuchPaddingException, NoSuchProviderException + { + Cipher cipher = createCipher(encryptionAlgID.getAlgorithm()); + ASN1Encodable sParams = encryptionAlgID.getParameters(); + String encAlg = encryptionAlgID.getAlgorithm().getId(); + + if (sParams != null && !(sParams instanceof ASN1Null)) + { + try + { + AlgorithmParameters params = createAlgorithmParameters(encryptionAlgID.getAlgorithm()); + + CMSUtils.loadParameters(params, sParams); + + cipher.init(Cipher.DECRYPT_MODE, sKey, params); + } + catch (NoSuchAlgorithmException e) + { + if (encAlg.equals(CMSAlgorithm.DES_CBC.getId()) + || encAlg.equals(CMSEnvelopedDataGenerator.DES_EDE3_CBC) + || encAlg.equals(CMSEnvelopedDataGenerator.IDEA_CBC) + || encAlg.equals(CMSEnvelopedDataGenerator.AES128_CBC) + || encAlg.equals(CMSEnvelopedDataGenerator.AES192_CBC) + || encAlg.equals(CMSEnvelopedDataGenerator.AES256_CBC)) + { + cipher.init(Cipher.DECRYPT_MODE, sKey, new IvParameterSpec( + ASN1OctetString.getInstance(sParams).getOctets())); + } + else + { + throw e; + } + } + } + else + { + if (encAlg.equals(CMSAlgorithm.DES_CBC.getId()) + || encAlg.equals(CMSEnvelopedDataGenerator.DES_EDE3_CBC) + || encAlg.equals(CMSEnvelopedDataGenerator.IDEA_CBC) + || encAlg.equals(CMSEnvelopedDataGenerator.CAST5_CBC)) + { + cipher.init(Cipher.DECRYPT_MODE, sKey, new IvParameterSpec(new byte[8])); + } + else + { + cipher.init(Cipher.DECRYPT_MODE, sKey); + } + } + + return cipher; + } + }); + } + + Mac createContentMac(final Key sKey, final AlgorithmIdentifier macAlgId) + throws CMSException + { + return (Mac)execute(new JCECallback() + { + public Object doInJCE() + throws CMSException, InvalidAlgorithmParameterException, + InvalidKeyException, InvalidParameterSpecException, NoSuchAlgorithmException, + NoSuchPaddingException, NoSuchProviderException + { + Mac mac = createMac(macAlgId.getAlgorithm()); + ASN1Encodable sParams = macAlgId.getParameters(); + String macAlg = macAlgId.getAlgorithm().getId(); + + if (sParams != null && !(sParams instanceof ASN1Null)) + { + try + { + AlgorithmParameters params = createAlgorithmParameters(macAlgId.getAlgorithm()); + + CMSUtils.loadParameters(params, sParams); + + mac.init(sKey, params.getParameterSpec(IvParameterSpec.class)); + } + catch (NoSuchAlgorithmException e) + { + throw e; + } + } + else + { + mac.init(sKey); + } + + return mac; + } + }); + } + + AlgorithmParameters createAlgorithmParameters(ASN1ObjectIdentifier algorithm) + throws NoSuchAlgorithmException, NoSuchProviderException + { + String algorithmName = (String)BASE_CIPHER_NAMES.get(algorithm); + + if (algorithmName != null) + { + try + { + // this is reversed as the Sun policy files now allow unlimited strength RSA + return helper.createAlgorithmParameters(algorithmName); + } + catch (NoSuchAlgorithmException e) + { + // Ignore + } + } + return helper.createAlgorithmParameters(algorithm.getId()); + } + + + KeyPairGenerator createKeyPairGenerator(ASN1ObjectIdentifier algorithm) + throws CMSException + { + try + { + String cipherName = (String)BASE_CIPHER_NAMES.get(algorithm); + + if (cipherName != null) + { + try + { + // this is reversed as the Sun policy files now allow unlimited strength RSA + return helper.createKeyPairGenerator(cipherName); + } + catch (NoSuchAlgorithmException e) + { + // Ignore + } + } + return helper.createKeyPairGenerator(algorithm.getId()); + } + catch (GeneralSecurityException e) + { + throw new CMSException("cannot create key pair generator: " + e.getMessage(), e); + } + } + + public KeyGenerator createKeyGenerator(ASN1ObjectIdentifier algorithm) + throws CMSException + { + try + { + String cipherName = (String)BASE_CIPHER_NAMES.get(algorithm); + + if (cipherName != null) + { + try + { + // this is reversed as the Sun policy files now allow unlimited strength RSA + return helper.createKeyGenerator(cipherName); + } + catch (NoSuchAlgorithmException e) + { + // Ignore + } + } + return helper.createKeyGenerator(algorithm.getId()); + } + catch (GeneralSecurityException e) + { + throw new CMSException("cannot create key generator: " + e.getMessage(), e); + } + } + + AlgorithmParameters generateParameters(ASN1ObjectIdentifier encryptionOID, SecretKey encKey, SecureRandom rand) + throws CMSException + { + try + { + AlgorithmParameterGenerator pGen = createAlgorithmParameterGenerator(encryptionOID); + + if (encryptionOID.equals(CMSAlgorithm.RC2_CBC)) + { + byte[] iv = new byte[8]; + + rand.nextBytes(iv); + + try + { + pGen.init(new RC2ParameterSpec(encKey.getEncoded().length * 8, iv), rand); + } + catch (InvalidAlgorithmParameterException e) + { + throw new CMSException("parameters generation error: " + e, e); + } + } + + return pGen.generateParameters(); + } + catch (NoSuchAlgorithmException e) + { + return null; + } + catch (GeneralSecurityException e) + { + throw new CMSException("exception creating algorithm parameter generator: " + e, e); + } + } + + AlgorithmIdentifier getAlgorithmIdentifier(ASN1ObjectIdentifier encryptionOID, AlgorithmParameters params) + throws CMSException + { + ASN1Encodable asn1Params; + if (params != null) + { + asn1Params = CMSUtils.extractParameters(params); + } + else + { + asn1Params = DERNull.INSTANCE; + } + + return new AlgorithmIdentifier( + encryptionOID, + asn1Params); + } + + static Object execute(JCECallback callback) throws CMSException + { + try + { + return callback.doInJCE(); + } + catch (NoSuchAlgorithmException e) + { + throw new CMSException("can't find algorithm.", e); + } + catch (InvalidKeyException e) + { + throw new CMSException("key invalid in message.", e); + } + catch (NoSuchProviderException e) + { + throw new CMSException("can't find provider.", e); + } + catch (NoSuchPaddingException e) + { + throw new CMSException("required padding not supported.", e); + } + catch (InvalidAlgorithmParameterException e) + { + throw new CMSException("algorithm parameters invalid.", e); + } + catch (InvalidParameterSpecException e) + { + throw new CMSException("MAC algorithm parameter spec invalid.", e); + } + } + + public KeyFactory createKeyFactory(ASN1ObjectIdentifier algorithm) + throws CMSException + { + try + { + String cipherName = (String)BASE_CIPHER_NAMES.get(algorithm); + + if (cipherName != null) + { + try + { + // this is reversed as the Sun policy files now allow unlimited strength RSA + return helper.createKeyFactory(cipherName); + } + catch (NoSuchAlgorithmException e) + { + // Ignore + } + } + return helper.createKeyFactory(algorithm.getId()); + } + catch (GeneralSecurityException e) + { + throw new CMSException("cannot create key factory: " + e.getMessage(), e); + } + } + + public JceAsymmetricKeyUnwrapper createAsymmetricUnwrapper(AlgorithmIdentifier keyEncryptionAlgorithm, PrivateKey keyEncryptionKey) + { + return helper.createAsymmetricUnwrapper(keyEncryptionAlgorithm, keyEncryptionKey); + } + + public SymmetricKeyUnwrapper createSymmetricUnwrapper(AlgorithmIdentifier keyEncryptionAlgorithm, SecretKey keyEncryptionKey) + { + return helper.createSymmetricUnwrapper(keyEncryptionAlgorithm, keyEncryptionKey); + } + + public AlgorithmIdentifier getAlgorithmIdentifier(ASN1ObjectIdentifier macOID, AlgorithmParameterSpec paramSpec) + { + if (paramSpec instanceof IvParameterSpec) + { + return new AlgorithmIdentifier(macOID, new DEROctetString(((IvParameterSpec)paramSpec).getIV())); + } + + if (paramSpec instanceof RC2ParameterSpec) + { + RC2ParameterSpec rc2Spec = (RC2ParameterSpec)paramSpec; + + int effKeyBits = ((RC2ParameterSpec)paramSpec).getEffectiveKeyBits(); + + if (effKeyBits != -1) + { + int parameterVersion; + + if (effKeyBits < 256) + { + parameterVersion = rc2Table[effKeyBits]; + } + else + { + parameterVersion = effKeyBits; + } + + return new AlgorithmIdentifier(macOID, new RC2CBCParameter(parameterVersion, rc2Spec.getIV())); + } + + return new AlgorithmIdentifier(macOID, new RC2CBCParameter(rc2Spec.getIV())); + } + + throw new IllegalStateException("unknown parameter spec: " + paramSpec); + } + + static interface JCECallback + { + Object doInJCE() + throws CMSException, InvalidAlgorithmParameterException, InvalidKeyException, InvalidParameterSpecException, + NoSuchAlgorithmException, NoSuchPaddingException, NoSuchProviderException; + } +} |