/* Copyright (C) 2001-2006 artofcode LLC.
   All Rights Reserved.
  
   This software is provided AS-IS with no warranty, either express or
   implied.

   This software is distributed under license and may not be copied, modified
   or distributed except as expressly authorized under the terms of that
   license.  Refer to licensing information at http://www.artifex.com/
   or contact Artifex Software, Inc.,  7 Mt. Lassen Drive - Suite A-134,
   San Rafael, CA  94903, U.S.A., +1(415)492-9861, for further information.
*/

/* $Id: gscrypt1.c 6651 2006-03-13 16:18:19Z stefan $ */
/* Adobe Type 1 encryption/decryption. */
#include "stdpre.h"
#include "gstypes.h"
#include "gscrypt1.h"

/* Encrypt a string. */
int
gs_type1_encrypt(byte * dest, const byte * src, uint len, crypt_state * pstate)
{
    crypt_state state = *pstate;
    const byte *from = src;
    byte *to = dest;
    uint count = len;

    while (count) {
	encrypt_next(*from, state, *to);
	from++, to++, count--;
    }
    *pstate = state;
    return 0;
}
/* Decrypt a string. */
int
gs_type1_decrypt(byte * dest, const byte * src, uint len, crypt_state * pstate)
{
    crypt_state state = *pstate;
    const byte *from = src;
    byte *to = dest;
    uint count = len;

    while (count) {
	/* If from == to, we can't use the obvious */
	/*      decrypt_next(*from, state, *to);        */
	byte ch = *from++;

	decrypt_next(ch, state, *to);
	to++, count--;
    }
    *pstate = state;
    return 0;
}
