Arguments

 

input

   type:      char_string
   access:    read only
   mechanism: by descriptor
   Ciphertext record to be decrypted. The input argument is the
   address of a string descriptor pointing to a byte-aligned buffer
   containing the input record to be decrypted.
 

output

   type:      char_string
   access:    write only
   mechanism: by descriptor
   Plaintext record resulting when ENCRYPT$DECRYPT_ONE_RECORD
   completes execution. The output argument is the address of a
   string descriptor pointing to a byte-aligned buffer that will
   contain the plaintext record.

   If the descriptor is dynamic and insufficient space is allocated
   to contain the output record, storage is allocated from dynamic
   memory. If insufficient space exists to contain the output of the
   operation, an error is returned.

   The ENCRYPT$DECRYPT_ONE_RECORD routine adjusts the length of the
   output descriptor, if possible, to reflect the actual length of
   the output string.
 

key-name

   type:      char_string
   access:    read only
   mechanism: by descriptor
   Key used to initialize the decrypt stream. The key-name argument
   is the address of a string descriptor pointing to the name of the
   previously defined user key to be used.
 

algorithm

   type:      char_string
   access:    read only
   mechanism: by descriptor
   Algorithm used for the decryption operation. The algorithm
   argument is the address of a string descriptor pointing to
   a code for the selected algorithm. The algorithm code is an
   ASCII string. Specify the descriptor type value as one of the
   following:

   o  DSC$K_DTYPE_T (text)

   o  DSC$K_DTYPE_VT (varying text)

   o  DSC$K_DTYPE_Z (unspecified)

   For DES, the following algorithms are valid:

   o  DESCBC (default)

   o  DESECB

   o  DESCFB

   For AES, the following algorithms are valid:

   o  Cipher block chaining:

         AESCBC128 (default)
         AESCBC192
         AESCBC256

   o  Electronic code book:

         AESECB128
         AESECB192
         AESECB256

   o  Cipher feedback:

         AESCFB128
         AESCFB192
         AESCFB256

   o  Output feedback:

         AESOFB128
         AESOFB192
         AESOFB256