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/* Copyright (C) 1999 Aladdin Enterprises. All rights reserved.
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This software is provided AS-IS with no warranty, either express or
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implied.
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This software is distributed under license and may not be copied,
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modified or distributed except as expressly authorized under the terms
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of the license contained in the file LICENSE in this distribution.
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For more information about licensing, please refer to
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http://www.ghostscript.com/licensing/. For information on
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commercial licensing, go to http://www.artifex.com/licensing/ or
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contact Artifex Software, Inc., 101 Lucas Valley Road #110,
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San Rafael, CA 94903, U.S.A., +1(415)492-9861.
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*/
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/* $Id: gscrypt1.c,v 1.4 2002/02/21 22:24:52 giles Exp $ */
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/* Adobe Type 1 encryption/decryption. */
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#include "stdpre.h"
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#include "gstypes.h"
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#include "gscrypt1.h"
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/* Encrypt a string. */
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int
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gs_type1_encrypt(byte * dest, const byte * src, uint len, crypt_state * pstate)
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{
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crypt_state state = *pstate;
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const byte *from = src;
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byte *to = dest;
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uint count = len;
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while (count) {
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encrypt_next(*from, state, *to);
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from++, to++, count--;
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}
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*pstate = state;
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return 0;
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}
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/* Decrypt a string. */
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int
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gs_type1_decrypt(byte * dest, const byte * src, uint len, crypt_state * pstate)
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{
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crypt_state state = *pstate;
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const byte *from = src;
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byte *to = dest;
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uint count = len;
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while (count) {
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/* If from == to, we can't use the obvious */
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/* decrypt_next(*from, state, *to); */
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byte ch = *from++;
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decrypt_next(ch, state, *to);
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to++, count--;
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}
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*pstate = state;
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return 0;
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}
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