Class UserAttributeSubpacketInputStream

java.lang.Object

java.io.InputStream

org.bouncycastle.bcpg.UserAttributeSubpacketInputStream

All Implemented Interfaces:

Closeable, AutoCloseable, UserAttributeSubpacketTags

public class UserAttributeSubpacketInputStream
extends InputStream
implements UserAttributeSubpacketTags

reader for user attribute sub-packets

Field Summary

Fields

Modifier and Type	Field	Description
static final int	MAX_SUBPACKET_LEN	Hard upper bound on a single user-attribute subpacket body.

Fields inherited from interface UserAttributeSubpacketTags

IMAGE_ATTRIBUTE

Constructor Summary

Constructors

Constructor	Description
UserAttributeSubpacketInputStream(InputStream in)
UserAttributeSubpacketInputStream(InputStream in, int limit)

Method Summary

Modifier and Type	Method	Description
int	available()
int	read()
UserAttributeSubpacket	readPacket()

Methods inherited from class InputStream

close, mark, markSupported, nullInputStream, read, read, readAllBytes, readNBytes, readNBytes, reset, skip, skipNBytes, transferTo

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

MAX_SUBPACKET_LEN

public static final int MAX_SUBPACKET_LEN

Hard upper bound on a single user-attribute subpacket body. This is an absolute cap applied independently of StreamUtil.findLimit(InputStream), which for the non-seekable streams used during packet parsing returns close to the JVM heap size and so does not bound the per-packet allocation. Without it a crafted 4-octet length header could force a multi-gigabyte new byte[] before any body bytes are read. 2 MiB matches the ceiling used for signature subpackets (SignaturePacket.MAX_SUBPACKET_LEN) and public-key packets (PublicKeyPacket.MAX_LEN); user-attribute (image) subpackets are not expected to approach it.

See Also:

• Constant Field Values

Constructor Details

UserAttributeSubpacketInputStream

public UserAttributeSubpacketInputStream(InputStream in)

UserAttributeSubpacketInputStream

public UserAttributeSubpacketInputStream(InputStream in,
 int limit)

Method Details

available

public int available()
              throws IOException

Overrides:

available in class InputStream

Throws:

IOException

read

public int read()
         throws IOException

Specified by:

read in class InputStream

Throws:

IOException

readPacket

public UserAttributeSubpacket readPacket()
                                  throws IOException

Throws:

IOException