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authorWilliam Pitcock <nenolod@dereferenced.org>2011-12-19 01:25:09 -0600
committerBernhard Reutner-Fischer <rep.dot.nop@gmail.com>2011-12-22 14:07:08 +0100
commit3ac5fd7ecaeb6721d812c2b93e446bf9a31acdde (patch)
tree8c4213f8174516406a1e3f830fcfb34ddea909f4 /libcrypt/sha256.h
parent4c24dabb9cea4c8148d7a7efc7a1df694424c483 (diff)
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 <nenolod@dereferenced.org> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Diffstat (limited to 'libcrypt/sha256.h')
-rw-r--r--libcrypt/sha256.h58
1 files changed, 58 insertions, 0 deletions
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 <limits.h>
+#include <stdint.h>
+#include <stdio.h>
+
+
+/* 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 */