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// --- BEGIN COPYRIGHT BLOCK ---
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; version 2 of the License.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2007 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
package netscape.security.pkcs;
import java.io.IOException;
import netscape.security.util.DerInputStream;
import netscape.security.util.DerOutputStream;
import netscape.security.util.DerValue;
import netscape.security.util.ObjectIdentifier;
/**
* A ContentInfo type, as defined in PKCS#7.
*
* @version 1.12
* @author Benjamin Renaud
*/
public class ContentInfo {
// pkcs7 pre-defined content types
private static int[] pkcs7 = {1, 2, 840, 113549, 1, 7};
private static int[] data = {1, 2, 840, 113549, 1, 7, 1};
private static int[] sdata = {1, 2, 840, 113549, 1, 7, 2};
private static int[] edata = {1, 2, 840, 113549, 1, 7, 3};
private static int[] sedata = {1, 2, 840, 113549, 1, 7, 4};
private static int[] ddata = {1, 2, 840, 113549, 1, 7, 5};
private static int[] crdata = {1, 2, 840, 113549, 1, 7, 6};
public static final ObjectIdentifier PKCS7_OID =
new ObjectIdentifier(pkcs7);
public static final ObjectIdentifier DATA_OID =
new ObjectIdentifier(data);
public static final ObjectIdentifier SIGNED_DATA_OID =
new ObjectIdentifier(sdata);
public static final ObjectIdentifier ENVELOPED_DATA_OID =
new ObjectIdentifier(edata);
public static final ObjectIdentifier SIGNED_AND_ENVELOPED_DATA_OID =
new ObjectIdentifier(sedata);
public static final ObjectIdentifier DIGESTED_DATA_OID =
new ObjectIdentifier(ddata);
public static final ObjectIdentifier ENCRYPTED_DATA_OID =
new ObjectIdentifier(crdata);
ObjectIdentifier contentType;
DerValue content; // OPTIONAL
public ContentInfo(ObjectIdentifier contentType, DerValue content) {
this.contentType = contentType;
this.content = content;
}
/**
* Make a contentInfo of type data.
*/
public ContentInfo(byte[] bytes) {
DerValue octetString = new DerValue(DerValue.tag_OctetString, bytes);
this.contentType = DATA_OID;
this.content = octetString;
}
public ContentInfo(DerInputStream derin)
throws IOException, ParsingException {
DerInputStream disType;
DerInputStream disTaggedContent;
DerValue type;
DerValue taggedContent;
DerValue[] typeAndContent;
DerValue[] contents;
typeAndContent = derin.getSequence(2);
// Parse the content type
type = typeAndContent[0];
disType = new DerInputStream(type.toByteArray());
contentType = disType.getOID();
// Parse the content (OPTIONAL field).
// Skip the [0] EXPLICIT tag by pretending that the content is the one
// and only element in an implicitly tagged set
if (typeAndContent.length > 1) { // content is OPTIONAL
taggedContent = typeAndContent[1];
disTaggedContent = new DerInputStream(taggedContent.toByteArray());
contents = disTaggedContent.getSet(1, true);
content = contents[0];
}
}
public DerValue getContent() {
return content;
}
public byte[] getData() throws IOException {
if (contentType.equals(DATA_OID)) {
return content.getOctetString();
}
throw new IOException("content type is not DATA: " + contentType);
}
public void encode(DerOutputStream out) throws IOException {
DerOutputStream contentDerCode;
DerOutputStream seq;
DerValue taggedContent;
contentDerCode = new DerOutputStream();
content.encode(contentDerCode);
// Add the [0] EXPLICIT tag in front of the content encoding
taggedContent = new DerValue((byte)0xA0,
contentDerCode.toByteArray());
seq = new DerOutputStream();
seq.putOID(contentType);
seq.putDerValue(taggedContent);
out.write(DerValue.tag_Sequence, seq);
}
/**
* Returns a byte array representation of the data held in
* the content field.
*/
public byte[] getContentBytes() throws IOException {
DerInputStream dis = new DerInputStream(content.toByteArray());
return dis.getOctetString();
}
public String toString() {
String out = "";
out += "Content Info Sequence\n\tContent type: " + contentType + "\n";
out += "\tContent: " + content;
return out;
}
}
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