Java DerInputStream.getBigInteger方法代码示例

import sun.security.util.DerInputStream; //导入方法依赖的package包/类
protected void parseKeyBits() throws InvalidKeyException {
    try {
        DerInputStream in = new DerInputStream(getKey().toByteArray());
        y = in.getBigInteger();
    } catch (IOException e) {
        throw new InvalidKeyException("Invalid key: y value\n" +
                                      e.getMessage());
    }
}
 

import sun.security.util.DerInputStream; //导入方法依赖的package包/类
protected void parseKeyBits() throws InvalidKeyException {
    try {
        DerInputStream in = new DerInputStream(key);
        x = in.getBigInteger();
    } catch (IOException e) {
        InvalidKeyException ike = new InvalidKeyException(e.getMessage());
        ike.initCause(e);
        throw ike;
    }
}
 

import sun.security.util.DerInputStream; //导入方法依赖的package包/类
/**
 * Parses a PKCS#7 signer info.
 *
 * <p>This constructor is used only for backwards compatibility with
 * PKCS#7 blocks that were generated using JDK1.1.x.
 *
 * @param derin the ASN.1 encoding of the signer info.
 * @param oldStyle flag indicating whether or not the given signer info
 * is encoded according to JDK1.1.x.
 */
public SignerInfo(DerInputStream derin, boolean oldStyle)
    throws IOException, ParsingException
{
    // version
    version = derin.getBigInteger();

    // issuerAndSerialNumber
    DerValue[] issuerAndSerialNumber = derin.getSequence(2);
    byte[] issuerBytes = issuerAndSerialNumber[0].toByteArray();
    issuerName = new X500Name(new DerValue(DerValue.tag_Sequence,
                                           issuerBytes));
    certificateSerialNumber = issuerAndSerialNumber[1].getBigInteger();

    // digestAlgorithmId
    DerValue tmp = derin.getDerValue();

    digestAlgorithmId = AlgorithmId.parse(tmp);

    // authenticatedAttributes
    if (oldStyle) {
        // In JDK1.1.x, the authenticatedAttributes are always present,
        // encoded as an empty Set (Set of length zero)
        derin.getSet(0);
    } else {
        // check if set of auth attributes (implicit tag) is provided
        // (auth attributes are OPTIONAL)
        if ((byte)(derin.peekByte()) == (byte)0xA0) {
            authenticatedAttributes = new PKCS9Attributes(derin);
        }
    }

    // digestEncryptionAlgorithmId - little RSA naming scheme -
    // signature == encryption...
    tmp = derin.getDerValue();

    digestEncryptionAlgorithmId = AlgorithmId.parse(tmp);

    // encryptedDigest
    encryptedDigest = derin.getOctetString();

    // unauthenticatedAttributes
    if (oldStyle) {
        // In JDK1.1.x, the unauthenticatedAttributes are always present,
        // encoded as an empty Set (Set of length zero)
        derin.getSet(0);
    } else {
        // check if set of unauth attributes (implicit tag) is provided
        // (unauth attributes are OPTIONAL)
        if (derin.available() != 0
            && (byte)(derin.peekByte()) == (byte)0xA1) {
            unauthenticatedAttributes =
                new PKCS9Attributes(derin, true);// ignore unsupported attrs
        }
    }

    // all done
    if (derin.available() != 0) {
        throw new ParsingException("extra data at the end");
    }
}