com.tencent.kona.sun.security.x509.KeyUsageExtension Maven / Gradle / Ivy
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
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*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* accompanied this code).
*
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package com.tencent.kona.sun.security.x509;
import java.io.IOException;
import com.tencent.kona.sun.security.util.BitArray;
import com.tencent.kona.sun.security.util.DerOutputStream;
import com.tencent.kona.sun.security.util.DerValue;
/**
* Represent the Key Usage Extension.
*
* This extension, if present, defines the purpose (e.g., encipherment,
* signature, certificate signing) of the key contained in the certificate.
* The usage restriction might be employed when a multipurpose key is to be
* restricted (e.g., when an RSA key should be used only for signing or only
* for key encipherment).
*
* @author Amit Kapoor
* @author Hemma Prafullchandra
* @see Extension
*/
public class KeyUsageExtension extends Extension {
public static final String NAME = "KeyUsage";
public static final String DIGITAL_SIGNATURE = "digital_signature";
public static final String NON_REPUDIATION = "non_repudiation";
public static final String KEY_ENCIPHERMENT = "key_encipherment";
public static final String DATA_ENCIPHERMENT = "data_encipherment";
public static final String KEY_AGREEMENT = "key_agreement";
public static final String KEY_CERTSIGN = "key_certsign";
public static final String CRL_SIGN = "crl_sign";
public static final String ENCIPHER_ONLY = "encipher_only";
public static final String DECIPHER_ONLY = "decipher_only";
// Private data members
private boolean[] bitString;
// Encode this extension value
private void encodeThis() {
DerOutputStream os = new DerOutputStream();
os.putTruncatedUnalignedBitString(new BitArray(this.bitString));
this.extensionValue = os.toByteArray();
}
/**
* Check if bit is set.
*
* @param position the position in the bit string to check.
*/
private boolean isSet(int position) {
return (position < bitString.length) &&
bitString[position];
}
/**
* Set the bit at the specified position.
*/
private void set(int position, boolean val) {
// enlarge bitString if necessary
if (position >= bitString.length) {
boolean[] tmp = new boolean[position+1];
System.arraycopy(bitString, 0, tmp, 0, bitString.length);
bitString = tmp;
}
bitString[position] = val;
}
/**
* Create a KeyUsageExtension with the passed bit settings. The criticality
* is set to true.
*
* @param bitString the bits to be set for the extension.
*/
public KeyUsageExtension(byte[] bitString) {
this.bitString =
new BitArray(bitString.length*8,bitString).toBooleanArray();
this.extensionId = PKIXExtensions.KeyUsage_Id;
this.critical = true;
encodeThis();
}
/**
* Create a KeyUsageExtension with the passed bit settings. The criticality
* is set to true.
*
* @param bitString the bits to be set for the extension.
*/
public KeyUsageExtension(boolean[] bitString) {
this.bitString = bitString;
this.extensionId = PKIXExtensions.KeyUsage_Id;
this.critical = true;
encodeThis();
}
/**
* Create a KeyUsageExtension with the passed bit settings. The criticality
* is set to true.
*
* @param bitString the bits to be set for the extension.
*/
public KeyUsageExtension(BitArray bitString) {
this.bitString = bitString.toBooleanArray();
this.extensionId = PKIXExtensions.KeyUsage_Id;
this.critical = true;
encodeThis();
}
/**
* Create the extension from the passed DER encoded value of the same.
* The DER encoded value may be wrapped in an OCTET STRING.
*
* @param critical true if the extension is to be treated as critical.
* @param value an array of DER encoded bytes of the actual value (possibly
* wrapped in an OCTET STRING).
* @exception ClassCastException if value is not an array of bytes
* @exception IOException on error.
*/
public KeyUsageExtension(Boolean critical, Object value)
throws IOException {
this.extensionId = PKIXExtensions.KeyUsage_Id;
this.critical = critical.booleanValue();
/*
* The following check should be activated again after
* the PKIX profiling work becomes standard and the check
* is not a barrier to interoperability !
* if (!this.critical) {
* throw new IOException("KeyUsageExtension not marked critical,"
* + " invalid profile.");
* }
*/
byte[] extValue = (byte[]) value;
if (extValue[0] == DerValue.tag_OctetString) {
this.extensionValue = new DerValue(extValue).getOctetString();
} else {
this.extensionValue = extValue;
}
DerValue val = new DerValue(this.extensionValue);
this.bitString = val.getUnalignedBitString().toBooleanArray();
}
/**
* Create a default key usage.
*/
public KeyUsageExtension() {
extensionId = PKIXExtensions.KeyUsage_Id;
critical = true;
bitString = new boolean[0];
}
/**
* Set the attribute value.
*/
public void set(String name, boolean val) throws IOException {
if (name.equalsIgnoreCase(DIGITAL_SIGNATURE)) {
set(0,val);
} else if (name.equalsIgnoreCase(NON_REPUDIATION)) {
set(1,val);
} else if (name.equalsIgnoreCase(KEY_ENCIPHERMENT)) {
set(2,val);
} else if (name.equalsIgnoreCase(DATA_ENCIPHERMENT)) {
set(3,val);
} else if (name.equalsIgnoreCase(KEY_AGREEMENT)) {
set(4,val);
} else if (name.equalsIgnoreCase(KEY_CERTSIGN)) {
set(5,val);
} else if (name.equalsIgnoreCase(CRL_SIGN)) {
set(6,val);
} else if (name.equalsIgnoreCase(ENCIPHER_ONLY)) {
set(7,val);
} else if (name.equalsIgnoreCase(DECIPHER_ONLY)) {
set(8,val);
} else {
throw new IOException("Attribute name not recognized by"
+ " KeyUsage.");
}
encodeThis();
}
/**
* Get the attribute value.
*/
public boolean get(String name) throws IOException {
if (name.equalsIgnoreCase(DIGITAL_SIGNATURE)) {
return isSet(0);
} else if (name.equalsIgnoreCase(NON_REPUDIATION)) {
return isSet(1);
} else if (name.equalsIgnoreCase(KEY_ENCIPHERMENT)) {
return isSet(2);
} else if (name.equalsIgnoreCase(DATA_ENCIPHERMENT)) {
return isSet(3);
} else if (name.equalsIgnoreCase(KEY_AGREEMENT)) {
return isSet(4);
} else if (name.equalsIgnoreCase(KEY_CERTSIGN)) {
return isSet(5);
} else if (name.equalsIgnoreCase(CRL_SIGN)) {
return isSet(6);
} else if (name.equalsIgnoreCase(ENCIPHER_ONLY)) {
return isSet(7);
} else if (name.equalsIgnoreCase(DECIPHER_ONLY)) {
return isSet(8);
} else {
throw new IOException("Attribute name not recognized by"
+ " KeyUsage.");
}
}
/**
* Returns a printable representation of the KeyUsage.
*/
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append(super.toString());
sb.append("KeyUsage [\n");
if (isSet(0)) {
sb.append(" DigitalSignature\n");
}
if (isSet(1)) {
sb.append(" Non_repudiation\n");
}
if (isSet(2)) {
sb.append(" Key_Encipherment\n");
}
if (isSet(3)) {
sb.append(" Data_Encipherment\n");
}
if (isSet(4)) {
sb.append(" Key_Agreement\n");
}
if (isSet(5)) {
sb.append(" Key_CertSign\n");
}
if (isSet(6)) {
sb.append(" Crl_Sign\n");
}
if (isSet(7)) {
sb.append(" Encipher_Only\n");
}
if (isSet(8)) {
sb.append(" Decipher_Only\n");
}
sb.append("]\n");
return sb.toString();
}
/**
* Write the extension to the DerOutputStream.
*
* @param out the DerOutputStream to write the extension to.
*/
@Override
public void encode(DerOutputStream out) {
if (this.extensionValue == null) {
this.extensionId = PKIXExtensions.KeyUsage_Id;
this.critical = true;
encodeThis();
}
super.encode(out);
}
public boolean[] getBits() {
return bitString.clone();
}
/**
* Return the name of this extension.
*/
@Override
public String getName() {
return NAME;
}
}