allowed. Other characters are converted to spaces, and the extra
   spaces are removed. AES ASCII key values are not subject to ASCII
   compression, allowing any 8-bit ASCII character.

   All other descriptor types are treated as though the key value is
   to be used exactly as specified.

                                  NOTE

      The key name descriptors of type DSC$K_DTYPE_T, DSC$K_DTYPE_
      VT, and DSC$K_DTYPE_Z all specify that the key value should
      be compressed. For OpenVMS V8.3, this functionality applies
      only to DES, not AES. AES keys are not compressed.
 

p1

   type:      quadword[1] (DES), quadword[2] (AES)
   access:    read only
   mechanism: by reference
   Optional argument. The p1 argument is the address of a quadword
   initialization vector used to seed the three modes of the DES
   algorithm that uses an initialization vector. These modes
   are: DESCBC (default), DESCFB, and DESMAC. That is, the DES IV
   initialization vector is a quadword reference, to an eight byte
   value.

   For AES, the optional P1 argument for the AES IV initialization
   vector is a reference to a 16 byte (two quadwords) value.

   If you omit this argument, the initialization vector used is
   the residue of the previous use of the specified context block.
   ENCRYPT$INIT initializes the context block with an initialization
   vector of zero.
 

2  ENCRYPT$STATISTICS
   Gains access to the statistics maintained by the Encryption
   software.

   Format

     ENCRYPT$STATISTICS  context, code, destination, return-length
 

3  Arguments
 

context

   type:      longword
   access:    read only
   mechanism: by reference
   Context area initialized by ENCRYPT$INIT. The context argument
   is the address of a longword initialized by the ENCRYPT$INIT
   routine.
 

code

   type:      longword
   access:    read only
   mechanism: by reference
   Code specifying the desired statistic. The code argument is the
   address of a longword containing the code. The only accepted
   value is 1, which indicates that ENCRYPT$STATISTICS is to return
   all statistics to the destination buffer.
 

destination

   type:      char_string
   access:    write only
   mechanism: by descriptor
   Buffer into which ENCRYPT$STATISTICS places the statistics.
   The destination argument is the address of a string descriptor
   describing the buffer. Ensure that the destination buffer is at
   least 20 bytes long and contains:

   o  One longword indicating the number of times the primitive has
      been entered referencing this encryption stream

   o  One quadword indicating the total bytes processed for this
      stream

   o  One quadword indicating the total CPU time, in OpenVMS time
      format, spent on processing requests for this stream
 

return-length

   type:      longword
   access:    write only
   mechanism: by reference
   Number of bytes written to the destination buffer. The return-
   length argument is the address of a word containing the number of
   bytes.