Constructor Detail

• HMAC256Generator

  public HMAC256Generator​(I2PAppContext context)

  Parameters:

  context - unused

Method Detail

• acquire

  protected I2PHMac acquire()

  Deprecated.

  unused (not even by Syndie)

  Overrides:

  acquire in class HMACGenerator

  Throws:

  UnsupportedOperationException - since 0.9.12

• calculate

  public Hash calculate​(SessionKey key,
                        byte[] data)

  Deprecated.

  unused (not even by Syndie)
  Calculate the HMAC of the data with the given key

  Overrides:

  calculate in class HMACGenerator

  Returns:

  the first 16 bytes contain the HMAC, the last 16 bytes are zero

  Throws:

  UnsupportedOperationException - always

  Since:

  0.9.12 overrides HMACGenerator

• calculate

  public void calculate​(SessionKey key,
                        byte[] data,
                        int offset,
                        int length,
                        byte[] target,
                        int targetOffset)

  Calculate the HMAC of the data with the given key. Outputs 32 bytes to target starting at targetOffset.

  Overrides:

  calculate in class HMACGenerator

  target - out parameter the first 16 bytes contain the HMAC, the last 16 bytes are zero

  targetOffset - offset into target to put the hmac

  Throws:

  UnsupportedOperationException - if the JVM does not support it

  IllegalArgumentException - for bad key or target too small

  Since:

  0.9.12 overrides HMACGenerator

• verify

  public boolean verify​(SessionKey key,
                        byte[] curData,
                        int curOffset,
                        int curLength,
                        byte[] origMAC,
                        int origMACOffset,
                        int origMACLength)

  Verify the MAC inline, reducing some unnecessary memory churn.

  Overrides:

  verify in class HMACGenerator

  Parameters:

  key - session key to verify the MAC with

  curData - MAC to verify

  curOffset - index into curData to MAC

  curLength - how much data in curData do we want to run the HMAC over

  origMAC - what do we expect the MAC of curData to equal

  origMACOffset - index into origMAC

  origMACLength - how much of the MAC do we want to verify, use 32 for HMAC256

  Since:

  0.9.12 overrides HMACGenerator