org.bouncycastle.bcpg
Class UserAttributeSubpacketInputStream

java.lang.Object
  java.io.InputStream
      org.bouncycastle.bcpg.UserAttributeSubpacketInputStream

All Implemented Interfaces:

UserAttributeSubpacketTags

public class UserAttributeSubpacketInputStream

extends java.io.InputStream

implements UserAttributeSubpacketTags

reader for user attribute sub-packets

Field Summary

static int

MAX_SUBPACKET_LEN Hard upper bound on a single user-attribute subpacket body.

Fields inherited from interface org.bouncycastle.bcpg.UserAttributeSubpacketTags

IMAGE_ATTRIBUTE

Constructor Summary

UserAttributeSubpacketInputStream(java.io.InputStream in)

UserAttributeSubpacketInputStream(java.io.InputStream in, int limit)

Method Summary

int	available()
int	read()
UserAttributeSubpacket	readPacket()

Methods inherited from class java.io.InputStream

close, mark, markSupported, read, read, reset, skip

Methods inherited from class java.lang.Object

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

Field Detail

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 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 Detail

UserAttributeSubpacketInputStream

public UserAttributeSubpacketInputStream(java.io.InputStream in)

UserAttributeSubpacketInputStream

public UserAttributeSubpacketInputStream(java.io.InputStream in,
                                         int limit)

Method Detail

available

public int available()
              throws java.io.IOException

Throws:

java.io.IOException

read

public int read()
         throws java.io.IOException

Throws:

java.io.IOException

readPacket

public UserAttributeSubpacket readPacket()
                                  throws java.io.IOException

Throws:

java.io.IOException