Java Ber类代码示例

import com.sun.jndi.ldap.Ber; //导入依赖的package包/类
private byte[] setEncodedValue(SortKey[] sortKeys) throws IOException {

        // build the ASN.1 BER encoding
        BerEncoder ber = new BerEncoder(30 * sortKeys.length + 10);
        String matchingRule;

        ber.beginSeq(Ber.ASN_SEQUENCE | Ber.ASN_CONSTRUCTOR);

        for (int i = 0; i < sortKeys.length; i++) {
            ber.beginSeq(Ber.ASN_SEQUENCE | Ber.ASN_CONSTRUCTOR);
            ber.encodeString(sortKeys[i].getAttributeID(), true); // v3

            if ((matchingRule = sortKeys[i].getMatchingRuleID()) != null) {
                ber.encodeString(matchingRule, (Ber.ASN_CONTEXT | 0), true);
            }
            if (! sortKeys[i].isAscending()) {
                ber.encodeBoolean(true, (Ber.ASN_CONTEXT | 1));
            }
            ber.endSeq();
        }
        ber.endSeq();

        return ber.getTrimmedBuf();
    }
 

import com.sun.jndi.ldap.Ber; //导入依赖的package包/类
private byte[] encodeResponseValue(int targetPosition, int contentCount,
		int virtualListViewResult) throws IOException {

	// build the ASN.1 encoding
	BerEncoder ber = new BerEncoder(10);

	ber.beginSeq(Ber.ASN_SEQUENCE | Ber.ASN_CONSTRUCTOR);
	ber.encodeInt(targetPosition); // list offset for the target entry
	ber.encodeInt(contentCount); // server's estimate of the current
	// number of entries in the list
	ber.encodeInt(virtualListViewResult, Ber.ASN_ENUMERATED);
	ber.encodeOctetString(new byte[0], Ber.ASN_OCTET_STR);
	ber.endSeq();

	return ber.getTrimmedBuf();
}
 

import com.sun.jndi.ldap.Ber; //导入依赖的package包/类
private void assertEncodedResponse(byte[] encodedValue,
		int expectedEncodingLength, int expectedTargetPosition,
		int expectedContentCount, int expectedVirtualListViewResult,
		byte[] expectedContextId) throws Exception {
	dumpEncodedValue("VirtualListViewResponse\n", encodedValue);
	assertThat(encodedValue.length).isEqualTo(expectedEncodingLength);
	BerDecoder ber = new BerDecoder(encodedValue, 0, encodedValue.length);
	ber.parseSeq(null);

	int actualTargetPosition = ber.parseInt();
	int actualContentCount = ber.parseInt();
	int actualVirtualListViewResult = ber.parseEnumeration();
	assertThat(actualTargetPosition).isEqualTo(expectedTargetPosition);
	assertThat(actualContentCount).as("contentCount,").isEqualTo(expectedContentCount);
	assertThat(actualVirtualListViewResult).isEqualTo(expectedVirtualListViewResult);
	byte[] bs = ber.parseOctetString(Ber.ASN_OCTET_STR, null);
	assertContextId(expectedContextId, bs);
}
 

import com.sun.jndi.ldap.Ber; //导入依赖的package包/类
@Test
public void testBerDecoding() throws Exception {
    byte[] value = new byte[1];
    value[0] = 8;
    int pageSize = 20;
    byte[] cookie = encodeValue(pageSize, value);
    
    BerDecoder ber = new BerDecoder(cookie, 0, cookie.length);

    ber.parseSeq(null);
    int actualPageSize = ber.parseInt();
    byte[] actualValue = ber.parseOctetString(Ber.ASN_OCTET_STR, null);

    assertThat(actualPageSize).as("pageSize,").isEqualTo(20);
    assertThat(actualValue.length).as("value length").isEqualTo(value.length);
    for (int i = 0; i < value.length; i++) {
        assertThat(actualValue[i]).as("value (index " + i + "),").isEqualTo(value[i]);
    }
}
 

import com.sun.jndi.ldap.Ber; //导入依赖的package包/类
/**
 * Constructs a paged-results response control.
 *
 * @param   id              The control's object identifier string.
 * @param   criticality     The control's criticality.
 * @param   value           The control's ASN.1 BER encoded value.
 *                          It is not cloned - any changes to value
 *                          will affect the contents of the control.
 * @exception IOException   If an error was encountered while decoding
 *                          the control's value.
 */
public PagedResultsResponseControl(String id, boolean criticality,
    byte[] value) throws IOException {

    super(id, criticality, value);

    // decode value
    BerDecoder ber = new BerDecoder(value, 0, value.length);

    ber.parseSeq(null);
    resultSize = ber.parseInt();
    cookie = ber.parseOctetString(Ber.ASN_OCTET_STR, null);
}
 

import com.sun.jndi.ldap.Ber; //导入依赖的package包/类
private byte[] setEncodedValue(int pageSize, byte[] cookie)
    throws IOException {

    // build the ASN.1 encoding
    BerEncoder ber = new BerEncoder(10 + cookie.length);

    ber.beginSeq(Ber.ASN_SEQUENCE | Ber.ASN_CONSTRUCTOR);
        ber.encodeInt(pageSize);
        ber.encodeOctetString(cookie, Ber.ASN_OCTET_STR);
    ber.endSeq();

    return ber.getTrimmedBuf();
}
 

import com.sun.jndi.ldap.Ber; //导入依赖的package包/类
/**
 * Constructs a control to indicate the outcome of a sort request.
 *
 * @param   id              The control's object identifier string.
 * @param   criticality     The control's criticality.
 * @param   value           The control's ASN.1 BER encoded value.
 *                          It is not cloned - any changes to value
 *                          will affect the contents of the control.
 * @exception               IOException if an error is encountered
 *                          while decoding the control's value.
 */
public SortResponseControl(String id, boolean criticality, byte[] value)
    throws IOException {

    super(id, criticality, value);

    // decode value
    BerDecoder ber = new BerDecoder(value, 0, value.length);

    ber.parseSeq(null);
    resultCode = ber.parseEnumeration();
    if ((ber.bytesLeft() > 0) && (ber.peekByte() == Ber.ASN_CONTEXT)) {
        badAttrId = ber.parseStringWithTag(Ber.ASN_CONTEXT, true, null);
    }
}