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Example 1 with RC2Engine

use of org.bouncycastle.crypto.engines.RC2Engine in project jruby-openssl by jruby.

the class PEMInputOutput method derivePrivateKeyPBES2.

private static PrivateKey derivePrivateKeyPBES2(EncryptedPrivateKeyInfo eIn, AlgorithmIdentifier algId, char[] password) throws GeneralSecurityException, InvalidCipherTextException {
    PBES2Parameters pbeParams = PBES2Parameters.getInstance((ASN1Sequence) algId.getParameters());
    CipherParameters cipherParams = extractPBES2CipherParams(password, pbeParams);
    EncryptionScheme scheme = pbeParams.getEncryptionScheme();
    BufferedBlockCipher cipher;
    if (scheme.getAlgorithm().equals(PKCSObjectIdentifiers.RC2_CBC)) {
        RC2CBCParameter rc2Params = RC2CBCParameter.getInstance(scheme);
        byte[] iv = rc2Params.getIV();
        CipherParameters param = new ParametersWithIV(cipherParams, iv);
        cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new RC2Engine()));
        cipher.init(false, param);
    } else {
        byte[] iv = ASN1OctetString.getInstance(scheme.getParameters()).getOctets();
        CipherParameters param = new ParametersWithIV(cipherParams, iv);
        cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new DESedeEngine()));
        cipher.init(false, param);
    }
    byte[] data = eIn.getEncryptedData();
    byte[] out = new byte[cipher.getOutputSize(data.length)];
    int len = cipher.processBytes(data, 0, data.length, out, 0);
    len += cipher.doFinal(out, len);
    byte[] pkcs8 = new byte[len];
    System.arraycopy(out, 0, pkcs8, 0, len);
    // It seems to work for both RSA and DSA.
    KeyFactory fact = SecurityHelper.getKeyFactory("RSA");
    return fact.generatePrivate(new PKCS8EncodedKeySpec(pkcs8));
}
Also used : PBES2Parameters(org.bouncycastle.asn1.pkcs.PBES2Parameters) EncryptionScheme(org.bouncycastle.asn1.pkcs.EncryptionScheme) PaddedBufferedBlockCipher(org.bouncycastle.crypto.paddings.PaddedBufferedBlockCipher) RC2Engine(org.bouncycastle.crypto.engines.RC2Engine) RC2CBCParameter(org.bouncycastle.asn1.pkcs.RC2CBCParameter) CipherParameters(org.bouncycastle.crypto.CipherParameters) ParametersWithIV(org.bouncycastle.crypto.params.ParametersWithIV) BufferedBlockCipher(org.bouncycastle.crypto.BufferedBlockCipher) PaddedBufferedBlockCipher(org.bouncycastle.crypto.paddings.PaddedBufferedBlockCipher) PKCS8EncodedKeySpec(java.security.spec.PKCS8EncodedKeySpec) CBCBlockCipher(org.bouncycastle.crypto.modes.CBCBlockCipher) DESedeEngine(org.bouncycastle.crypto.engines.DESedeEngine) SecretKeyFactory(javax.crypto.SecretKeyFactory) KeyFactory(java.security.KeyFactory)

Aggregations

KeyFactory (java.security.KeyFactory)1 PKCS8EncodedKeySpec (java.security.spec.PKCS8EncodedKeySpec)1 SecretKeyFactory (javax.crypto.SecretKeyFactory)1 EncryptionScheme (org.bouncycastle.asn1.pkcs.EncryptionScheme)1 PBES2Parameters (org.bouncycastle.asn1.pkcs.PBES2Parameters)1 RC2CBCParameter (org.bouncycastle.asn1.pkcs.RC2CBCParameter)1 BufferedBlockCipher (org.bouncycastle.crypto.BufferedBlockCipher)1 CipherParameters (org.bouncycastle.crypto.CipherParameters)1 DESedeEngine (org.bouncycastle.crypto.engines.DESedeEngine)1 RC2Engine (org.bouncycastle.crypto.engines.RC2Engine)1 CBCBlockCipher (org.bouncycastle.crypto.modes.CBCBlockCipher)1 PaddedBufferedBlockCipher (org.bouncycastle.crypto.paddings.PaddedBufferedBlockCipher)1 ParametersWithIV (org.bouncycastle.crypto.params.ParametersWithIV)1