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+/*
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+ * UFC-crypt: ultra fast crypt(3) implementation
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+ *
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+ * Copyright (C) 1991, 92, 93, 96, 97, 98, 2000 Free Software Foundation, Inc.
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+ *
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+ * This library is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU Library General Public
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+ * License as published by the Free Software Foundation; either
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+ * version 2 of the License, or (at your option) any later version.
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+ *
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+ * This library is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ * Library General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU Library General Public
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+ * License along with the GNU C Library; see the file COPYING.LIB. If not,
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+ * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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+ * Boston, MA 02111-1307, USA.
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+ *
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+ * @(#)crypt.h 1.5 12/20/96
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+ *
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+ */
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+
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+#ifndef _CRYPT_H
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+#define _CRYPT_H 1
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+
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+#include <features.h>
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+
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+/* Encrypt characters from KEY using salt to perturb the encryption method.
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+ * If salt begins with "$1$", md5 hashing is used instead of DES. */
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+extern char *crypt (const char *__key, const char *__salt);
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+
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+/* Setup DES tables according KEY. */
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+extern void setkey (const char *__key);
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+
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+/* Encrypt data in BLOCK in place if EDFLAG is zero; otherwise decrypt
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+ block in place. */
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+extern void encrypt (char *__block, int __edflag);
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+
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+
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+/* Reentrant versions of the functions above. The additional argument
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+ points to a structure where the results are placed in. */
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+struct crypt_data
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+{
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+ /* The C and D arrays used to calculate the key schedule. */
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+ char C[28];
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+ char D[28];
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+ /* The key schedule. Generated from the key. */
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+ char KS[16][48];
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+ /* The E bit-selection table. */
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+ char E[48];
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+ /* The current block, divided into 2 halves. */
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+ char L[32], R[32];
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+ char tempL[32];
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+ char f[32];
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+ /* The combination of the key and the input, before selection. */
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+ char preS[48];
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+ char block[66];
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+ char iobuf[16];
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+ /* Some stuff used by the md5 routines */
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+ char *p;
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+ const char *sp,*ep;
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+};
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+
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+extern char *crypt_r (const char *__key, const char *__salt,
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+ struct crypt_data * __data);
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+
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+extern void setkey_r (const char *__key,
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+ struct crypt_data * __data);
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+
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+extern void encrypt_r (char *__block, int __edflag,
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+ struct crypt_data * __data);
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+#endif /* crypt.h */
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