The ASN.1 definition is as follows: *
* PolicyQualifierInfo ::= SEQUENCE {
* policyQualifierId PolicyQualifierId,
* qualifier ANY DEFINED BY policyQualifierId }
*
* * A certificate policies extension, if present in an X.509 version 3 * certificate, contains a sequence of one or more policy information terms, * each of which consists of an object identifier (OID) and optional * qualifiers. In an end-entity certificate, these policy information terms * indicate the policy under which the certificate has been issued and the * purposes for which the certificate may be used. In a CA certificate, these * policy information terms limit the set of policies for certification paths * which include this certificate. *
* A Set of PolicyQualifierInfo objects are returned
* by the {@link PolicyNode#getPolicyQualifiers PolicyNode.getPolicyQualifiers}
* method. This allows applications with specific policy requirements to
* process and validate each policy qualifier. Applications that need to
* process policy qualifiers should explicitly set the
* policyQualifiersRejected flag to false (by calling the
* {@link PKIXParameters#setPolicyQualifiersRejected
* PKIXParameters.setPolicyQualifiersRejected} method) before validating
* a certification path.
*
*
Note that the PKIX certification path validation algorithm specifies
* that any policy qualifier in a certificate policies extension that is
* marked critical must be processed and validated. Otherwise the
* certification path must be rejected. If the
* policyQualifiersRejected flag is set to false, it is up to
* the application to validate all policy qualifiers in this manner in order
* to be PKIX compliant.
*
*
Concurrent Access * *
All PolicyQualifierInfo objects must be immutable and
* thread-safe. That is, multiple threads may concurrently invoke the
* methods defined in this class on a single PolicyQualifierInfo
* object (or more than one) with no ill effects. Requiring
* PolicyQualifierInfo objects to be immutable and thread-safe
* allows them to be passed around to various pieces of code without
* worrying about coordinating access.
*
* @author seth proctor
* @author Sean Mullan
* @since 1.4
*/
public class PolicyQualifierInfo {
private byte [] mEncoded;
private String mId;
private byte [] mData;
private String pqiString;
/**
* Creates an instance of PolicyQualifierInfo from the
* encoded bytes. The encoded byte array is copied on construction.
*
* @param encoded a byte array containing the qualifier in DER encoding
* @exception IOException thrown if the byte array does not represent a
* valid and parsable policy qualifier
*/
public PolicyQualifierInfo(byte[] encoded) throws IOException {
mEncoded = encoded.clone();
DerValue val = new DerValue(mEncoded);
if (val.tag != DerValue.tag_Sequence)
throw new IOException("Invalid encoding for PolicyQualifierInfo");
mId = (val.data.getDerValue()).getOID().toString();
byte [] tmp = val.data.toByteArray();
if (tmp == null) {
mData = null;
} else {
mData = new byte[tmp.length];
System.arraycopy(tmp, 0, mData, 0, tmp.length);
}
}
/**
* Returns the policyQualifierId field of this
* PolicyQualifierInfo. The policyQualifierId
* is an Object Identifier (OID) represented by a set of nonnegative
* integers separated by periods.
*
* @return the OID (never null)
*/
public final String getPolicyQualifierId() {
return mId;
}
/**
* Returns the ASN.1 DER encoded form of this
* PolicyQualifierInfo.
*
* @return the ASN.1 DER encoded bytes (never null).
* Note that a copy is returned, so the data is cloned each time
* this method is called.
*/
public final byte[] getEncoded() {
return mEncoded.clone();
}
/**
* Returns the ASN.1 DER encoded form of the qualifier
* field of this PolicyQualifierInfo.
*
* @return the ASN.1 DER encoded bytes of the qualifier
* field. Note that a copy is returned, so the data is cloned each
* time this method is called.
*/
public final byte[] getPolicyQualifier() {
return (mData == null ? null : mData.clone());
}
/**
* Return a printable representation of this
* PolicyQualifierInfo.
*
* @return a String describing the contents of this
* PolicyQualifierInfo
*/
public String toString() {
if (pqiString != null)
return pqiString;
HexDumpEncoder enc = new HexDumpEncoder();
StringBuffer sb = new StringBuffer();
sb.append("PolicyQualifierInfo: [\n");
sb.append(" qualifierID: " + mId + "\n");
sb.append(" qualifier: " +
(mData == null ? "null" : enc.encodeBuffer(mData)) + "\n");
sb.append("]");
pqiString = sb.toString();
return pqiString;
}
}