Examples of sun.security.rsa.RSAPadding

sun.security.rsa.RSAPadding

RSA padding and unpadding. Format of PKCS#1 v1.5 padding is: 0x00 | BT | PS...PS | 0x00 | data...data where BT is the blocktype (1 or 2). The length of the entire string must be the same as the size of the modulus (i.e. 128 byte for a 1024 bit key). Per spec, the padding string must be at least 8 bytes long. That leaves up to (length of key in bytes) - 11 bytes for the data. OAEP padding is a bit more complicated and has a number of options. We support: . arbitrary hash functions ('Hash' in the specification), MessageDigest implementation must be available . MGF1 as the mask generation function . the empty string as the default value for label L and whatever specified in javax.crypto.spec.OAEPParameterSpec Note: RSA keys should be at least 512 bits long @since 1.5 @author Andreas Sterbenz

            }
        }
    }


    private void checkRSAKeyLength(int len) throws InvalidKeyException {
        RSAPadding padding;
        try {
            padding = RSAPadding.getInstance
                (RSAPadding.PAD_BLOCKTYPE_1, (len + 7) >> 3);
        } catch (InvalidAlgorithmParameterException iape) {
            throw new InvalidKeyException(iape.getMessage());
        }
        int maxDataSize = padding.getMaxDataSize();
        int encodedLength;
        if (algorithm.equals("MD5withRSA") ||
            algorithm.equals("MD2withRSA")) {
            encodedLength = 34;
        } else if (algorithm.equals("SHA1withRSA")) {

    }


    private byte[] pkcs1Pad(byte[] data) {
        try {
            int len = (p11Key.length() + 7) >> 3;
            RSAPadding padding = RSAPadding.getInstance
                                        (RSAPadding.PAD_BLOCKTYPE_1, len);
            byte[] padded = padding.pad(data);
            return padded;
        } catch (GeneralSecurityException e) {
            throw new ProviderException(e);
        }
    }

Related Classes of sun.security.rsa.RSAPadding

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