From 3ac5fd7ecaeb6721d812c2b93e446bf9a31acdde Mon Sep 17 00:00:00 2001 From: William Pitcock Date: Mon, 19 Dec 2011 01:25:09 -0600 Subject: libcrypt: add support for SHA256-CRYPT password hashing This is based on Ulrich Drepper's implementation in GLIBC, but hacked up to work in uClibc. The differences from the GLIBC version are as follows: - b64_from_24bit() has been converted into a macro - Usage of GLIBC-isms (such as libc_freeres_ptr) have been removed It is enabled by the UCLIBC_HAS_SHA256_CRYPT_IMPL configuration symbol. You must have UCLIBC_HAS_CRYPT_IMPL enabled as well. Signed-off-by: William Pitcock Signed-off-by: Bernhard Reutner-Fischer --- libcrypt/sha256.h | 58 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 libcrypt/sha256.h (limited to 'libcrypt/sha256.h') diff --git a/libcrypt/sha256.h b/libcrypt/sha256.h new file mode 100644 index 000000000..291674f35 --- /dev/null +++ b/libcrypt/sha256.h @@ -0,0 +1,58 @@ +/* Declaration of functions and data types used for SHA256 sum computing + library functions. + Copyright (C) 2007 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#ifndef _SHA256_H +#define _SHA256_H 1 + +#include +#include +#include + + +/* Structure to save state of computation between the single steps. */ +struct sha256_ctx +{ + uint32_t H[8]; + + uint32_t total[2]; + uint32_t buflen; + char buffer[128] __attribute__ ((__aligned__ (__alignof__ (uint32_t)))); +}; + +/* Initialize structure containing state of computation. + (FIPS 180-2: 5.3.2) */ +extern void __sha256_init_ctx (struct sha256_ctx *ctx) attribute_hidden; + +/* 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) attribute_hidden; + +/* 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) + attribute_hidden; + +#endif /* sha256.h */ -- cgit v1.2.3