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- /* Copyright (C) 1999 Aladdin Enterprises. All rights reserved.
-
- This file is part of AFPL Ghostscript.
-
- AFPL Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author or
- distributor accepts any responsibility for the consequences of using it, or
- for whether it serves any particular purpose or works at all, unless he or
- she says so in writing. Refer to the Aladdin Free Public License (the
- "License") for full details.
-
- Every copy of AFPL Ghostscript must include a copy of the License, normally
- in a plain ASCII text file named PUBLIC. The License grants you the right
- to copy, modify and redistribute AFPL Ghostscript, but only under certain
- conditions described in the License. Among other things, the License
- requires that the copyright notice and this notice be preserved on all
- copies.
- */
-
- /*$Id: gscrypt1.c,v 1.2 2000/09/19 19:00:27 lpd Exp $ */
- /* 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;
- }
-