crypt: Remove libcrypt support

All the crypt related functions, cryptographic algorithms, and
make requirements are removed,  with only the exception of md5
implementation which is moved to locale folder since it is
required by localedef for integrity protection (libc's
locale-reading code does not check these, but localedef does
generate them).

Besides thec code itself, both internal documentation and the
manual is also adjusted.  This allows to remove both --enable-crypt
and --enable-nss-crypt configure options.

Checked with a build for all affected ABIs.

Co-authored-by: Zack Weinberg <zack@owlfolio.org>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>

1 files changed, 0 insertions, 70 deletions

diff --git a/crypt/crypt.h b/crypt/crypt.h
deleted file mode 100644
index acc081960f..0000000000
--- a/crypt/crypt.h
+++ /dev/null
@@ -1,70 +0,0 @@
-/*
- * UFC-crypt: ultra fast crypt(3) implementation
- *
- * Copyright (C) 1991-2023 Free Software Foundation, Inc.
- *
- * The GNU C Library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * The GNU C Library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with the GNU C Library; if not, see
- * <https://www.gnu.org/licenses/>.
- *
- * @(#)crypt.h	1.5 12/20/96
- *
- */
-
-#ifndef _CRYPT_H
-#define _CRYPT_H	1
-
-#include <features.h>
-
-__BEGIN_DECLS
-
-/* One-way hash PHRASE, returning a string suitable for storage in the
-   user database.  SALT selects the one-way function to use, and
-   ensures that no two users' hashes are the same, even if they use
-   the same passphrase.  The return value points to static storage
-   which will be overwritten by the next call to crypt.  */
-extern char *crypt (const char *__phrase, const char *__salt)
-     __THROW __nonnull ((1, 2));
-
-#ifdef __USE_GNU
-
-/* This structure provides scratch and output buffers for 'crypt_r'.
-   Its contents should not be accessed directly.  */
-struct crypt_data
-  {
-    char keysched[16 * 8];
-    char sb0[32768];
-    char sb1[32768];
-    char sb2[32768];
-    char sb3[32768];
-    /* end-of-aligment-critical-data */
-    char crypt_3_buf[14];
-    char current_salt[2];
-    long int current_saltbits;
-    int  direction, initialized;
-  };
-
-/* Thread-safe version of 'crypt'.
-   DATA must point to a 'struct crypt_data' allocated by the caller.
-   Before the first call to 'crypt_r' with a new 'struct crypt_data',
-   that object must be initialized to all zeroes.  The pointer
-   returned, if not NULL, will point within DATA.  (It will still be
-   overwritten by the next call to 'crypt_r' with the same DATA.)  */
-extern char *crypt_r (const char *__phrase, const char *__salt,
-		      struct crypt_data * __restrict __data)
-     __THROW __nonnull ((1, 2, 3));
-#endif
-
-__END_DECLS
-
-#endif	/* crypt.h */