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, 69 deletions

diff --git a/crypt/sha256.h b/crypt/sha256.h
deleted file mode 100644
index 94b2130..0000000
--- a/crypt/sha256.h
+++ /dev/null
@@ -1,69 +0,0 @@
-/* Declaration of functions and data types used for SHA256 sum computing
-   library functions.
-   Copyright (C) 2007-2023 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   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/>.  */
-
-#ifndef _SHA256_H
-#define _SHA256_H 1
-
-#include <limits.h>
-#include <stdint.h>
-#include <stdio.h>
-#include <endian.h>
-
-
-/* Structure to save state of computation between the single steps.  */
-struct sha256_ctx
-{
-  uint32_t H[8];
-
-  union
-  {
-    uint64_t total64;
-#define TOTAL64_low (1 - (BYTE_ORDER == LITTLE_ENDIAN))
-#define TOTAL64_high (BYTE_ORDER == LITTLE_ENDIAN)
-    uint32_t total[2];
-  };
-  uint32_t buflen;
-  union
-  {
-    char buffer[128];
-    uint32_t buffer32[32];
-    uint64_t buffer64[16];
-  };
-};
-
-/* Initialize structure containing state of computation.
-   (FIPS 180-2: 5.3.2)  */
-extern void __sha256_init_ctx (struct sha256_ctx *ctx) __THROW;
-
-/* Starting with the result of former calls of this function (or the
-   initialization function update the context for the next LEN bytes
-   starting at BUFFER.
-   It is NOT required that LEN is a multiple of 64.  */
-extern void __sha256_process_bytes (const void *buffer, size_t len,
-				    struct sha256_ctx *ctx) __THROW;
-
-/* Process the remaining bytes in the buffer and put result from CTX
-   in first 32 bytes following RESBUF.
-
-   IMPORTANT: On some systems it is required that RESBUF is correctly
-   aligned for a 32 bits value.  */
-extern void *__sha256_finish_ctx (struct sha256_ctx *ctx, void *resbuf)
-  __THROW;
-
-#endif /* sha256.h */