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Example 6 with RSABlindedEngine

use of org.bouncycastle.crypto.engines.RSABlindedEngine in project XobotOS by xamarin.

the class JCERSACipher method engineInit.

protected void engineInit(int opmode, Key key, AlgorithmParameterSpec params, SecureRandom random) throws InvalidKeyException, InvalidAlgorithmParameterException {
    CipherParameters param;
    if (params == null || params instanceof OAEPParameterSpec) {
        if (key instanceof RSAPublicKey) {
            if (privateKeyOnly) {
                throw new InvalidKeyException("mode 1 requires RSAPrivateKey");
            }
            param = RSAUtil.generatePublicKeyParameter((RSAPublicKey) key);
        } else if (key instanceof RSAPrivateKey) {
            if (publicKeyOnly) {
                throw new InvalidKeyException("mode 2 requires RSAPublicKey");
            }
            param = RSAUtil.generatePrivateKeyParameter((RSAPrivateKey) key);
        } else {
            throw new InvalidKeyException("unknown key type passed to RSA");
        }
        if (params != null) {
            OAEPParameterSpec spec = (OAEPParameterSpec) params;
            paramSpec = params;
            if (!spec.getMGFAlgorithm().equalsIgnoreCase("MGF1") && !spec.getMGFAlgorithm().equals(PKCSObjectIdentifiers.id_mgf1.getId())) {
                throw new InvalidAlgorithmParameterException("unknown mask generation function specified");
            }
            if (!(spec.getMGFParameters() instanceof MGF1ParameterSpec)) {
                throw new InvalidAlgorithmParameterException("unkown MGF parameters");
            }
            Digest digest = JCEDigestUtil.getDigest(spec.getDigestAlgorithm());
            if (digest == null) {
                throw new InvalidAlgorithmParameterException("no match on digest algorithm: " + spec.getDigestAlgorithm());
            }
            MGF1ParameterSpec mgfParams = (MGF1ParameterSpec) spec.getMGFParameters();
            Digest mgfDigest = JCEDigestUtil.getDigest(mgfParams.getDigestAlgorithm());
            if (mgfDigest == null) {
                throw new InvalidAlgorithmParameterException("no match on MGF digest algorithm: " + mgfParams.getDigestAlgorithm());
            }
            cipher = new OAEPEncoding(new RSABlindedEngine(), digest, mgfDigest, ((PSource.PSpecified) spec.getPSource()).getValue());
        }
    } else {
        throw new IllegalArgumentException("unknown parameter type.");
    }
    if (!(cipher instanceof RSABlindedEngine)) {
        if (random != null) {
            param = new ParametersWithRandom(param, random);
        } else {
            param = new ParametersWithRandom(param, new SecureRandom());
        }
    }
    switch(opmode) {
        case Cipher.ENCRYPT_MODE:
        case Cipher.WRAP_MODE:
            cipher.init(true, param);
            break;
        case Cipher.DECRYPT_MODE:
        case Cipher.UNWRAP_MODE:
            cipher.init(false, param);
            break;
        default:
            throw new InvalidParameterException("unknown opmode " + opmode + " passed to RSA");
    }
}
Also used : InvalidAlgorithmParameterException(java.security.InvalidAlgorithmParameterException) Digest(org.bouncycastle.crypto.Digest) ParametersWithRandom(org.bouncycastle.crypto.params.ParametersWithRandom) SecureRandom(java.security.SecureRandom) InvalidKeyException(java.security.InvalidKeyException) OAEPParameterSpec(javax.crypto.spec.OAEPParameterSpec) CipherParameters(org.bouncycastle.crypto.CipherParameters) InvalidParameterException(java.security.InvalidParameterException) RSAPublicKey(java.security.interfaces.RSAPublicKey) RSABlindedEngine(org.bouncycastle.crypto.engines.RSABlindedEngine) OAEPEncoding(org.bouncycastle.crypto.encodings.OAEPEncoding) RSAPrivateKey(java.security.interfaces.RSAPrivateKey) MGF1ParameterSpec(java.security.spec.MGF1ParameterSpec)

Example 7 with RSABlindedEngine

use of org.bouncycastle.crypto.engines.RSABlindedEngine in project robovm by robovm.

the class CipherSpi method initFromSpec.

private void initFromSpec(OAEPParameterSpec pSpec) throws NoSuchPaddingException {
    MGF1ParameterSpec mgfParams = (MGF1ParameterSpec) pSpec.getMGFParameters();
    Digest digest = DigestFactory.getDigest(mgfParams.getDigestAlgorithm());
    if (digest == null) {
        throw new NoSuchPaddingException("no match on OAEP constructor for digest algorithm: " + mgfParams.getDigestAlgorithm());
    }
    cipher = new OAEPEncoding(new RSABlindedEngine(), digest, ((PSource.PSpecified) pSpec.getPSource()).getValue());
    paramSpec = pSpec;
}
Also used : Digest(org.bouncycastle.crypto.Digest) RSABlindedEngine(org.bouncycastle.crypto.engines.RSABlindedEngine) NoSuchPaddingException(javax.crypto.NoSuchPaddingException) OAEPEncoding(org.bouncycastle.crypto.encodings.OAEPEncoding) MGF1ParameterSpec(java.security.spec.MGF1ParameterSpec)

Aggregations

RSABlindedEngine (org.bouncycastle.crypto.engines.RSABlindedEngine)7 Digest (org.bouncycastle.crypto.Digest)5 MGF1ParameterSpec (java.security.spec.MGF1ParameterSpec)4 OAEPEncoding (org.bouncycastle.crypto.encodings.OAEPEncoding)4 InvalidAlgorithmParameterException (java.security.InvalidAlgorithmParameterException)2 InvalidKeyException (java.security.InvalidKeyException)2 InvalidParameterException (java.security.InvalidParameterException)2 SecureRandom (java.security.SecureRandom)2 RSAPrivateKey (java.security.interfaces.RSAPrivateKey)2 RSAPublicKey (java.security.interfaces.RSAPublicKey)2 BadPaddingException (javax.crypto.BadPaddingException)2 NoSuchPaddingException (javax.crypto.NoSuchPaddingException)2 OAEPParameterSpec (javax.crypto.spec.OAEPParameterSpec)2 CipherParameters (org.bouncycastle.crypto.CipherParameters)2 InvalidCipherTextException (org.bouncycastle.crypto.InvalidCipherTextException)2 ParametersWithRandom (org.bouncycastle.crypto.params.ParametersWithRandom)2 NoSuchAlgorithmException (java.security.NoSuchAlgorithmException)1 RSASSAPSSparams (org.bouncycastle.asn1.pkcs.RSASSAPSSparams)1 AlgorithmIdentifier (org.bouncycastle.asn1.x509.AlgorithmIdentifier)1 AsymmetricBlockCipher (org.bouncycastle.crypto.AsymmetricBlockCipher)1