staging: crypto: skein: allow building statically

These are the minimum changes required to get the code to build
statically in the kernel.  It's necessary to do this first so that we
can empirically determine that future cleanup patches aren't changing
the generated object code.

Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/Kconfig

@@ -146,6 +146,8 @@ source "drivers/staging/gs_fpgaboot/Kconfig"
 
 source "drivers/staging/nokia_h4p/Kconfig"
 
+source "drivers/staging/skein/Kconfig"
+
 source "drivers/staging/unisys/Kconfig"
 
 endif # STAGING

drivers/staging/Makefile

@@ -65,4 +65,5 @@ obj-$(CONFIG_DGAP)			+= dgap/
 obj-$(CONFIG_MTD_SPINAND_MT29F)	+= mt29f_spinand/
 obj-$(CONFIG_GS_FPGABOOT)	+= gs_fpgaboot/
 obj-$(CONFIG_BT_NOKIA_H4P)	+= nokia_h4p/
+obj-$(CONFIG_CRYPTO_SKEIN)	+= skein/
 obj-$(CONFIG_UNISYSSPAR)	+= unisys/

drivers/staging/skein/CMakeLists.txt

@@ -1,27 +0,0 @@
-cmake_minimum_required (VERSION 2.6)
-
-include_directories (${CMAKE_CURRENT_SOURCE_DIR}/include)
-
-# set(skeinBlock_src skein_block.c)
-set(skeinBlock_src skeinBlockNo3F.c)
-
-set(skein_src 
-    ${skeinBlock_src}
-    skein.c
-    skeinApi.c
-    )
-
-set(threefish_src
-    threefishApi.c
-    threefish256Block.c
-    threefish512Block.c
-    threefish1024Block.c
-    )
-set(s3f_src ${skein_src} ${threefish_src})
-
-add_library(skein3fish SHARED ${s3f_src})
-set_target_properties(skein3fish PROPERTIES VERSION ${VERSION} SOVERSION ${SOVERSION})
-target_link_libraries(skein3fish ${LIBS})
-
-install(TARGETS skein3fish DESTINATION ${LIBDIRNAME})
-

drivers/staging/skein/Kconfig

@@ -0,0 +1,32 @@
+config CRYPTO_SKEIN
+	bool "Skein digest algorithm"
+	depends on (X86 || UML_X86) && 64BIT
+	select CRYPTO_THREEFISH
+	select CRYPTO_HASH
+	help
+	  Skein secure hash algorithm is one of 5 finalists from the NIST SHA3
+	  competition.
+
+	  Skein is optimized for modern, 64bit processors and is highly
+	  customizable.  See:
+
+	  http://www.skein-hash.info/sites/default/files/skein1.3.pdf
+
+	  for more information.  This module depends on the threefish block
+	  cipher module.
+
+config CRYPTO_THREEFISH
+	bool "Threefish tweakable block cipher"
+	depends on (X86 || UML_X86) && 64BIT
+	select CRYPTO_ALGAPI
+	help
+	  Threefish cipher algorithm is the tweakable block cipher underneath
+	  the Skein family of secure hash algorithms.  Skein is one of 5
+	  finalists from the NIST SHA3 competition.
+
+	  Skein is optimized for modern, 64bit processors and is highly
+	  customizable.  See:
+
+	  http://www.skein-hash.info/sites/default/files/skein1.3.pdf
+
+	  for more information.

drivers/staging/skein/Makefile

@@ -0,0 +1,13 @@
+#
+# Makefile for the skein secure hash algorithm
+#
+subdir-ccflags-y := -I$(src)/include/
+
+obj-$(CONFIG_CRYPTO_SKEIN) +=   skein.o \
+				skeinApi.o \
+				skein_block.o
+
+obj-$(CONFIG_CRYPTO_THREEFISH) += threefish1024Block.o \
+				  threefish256Block.o \
+				  threefish512Block.o \
+				  threefishApi.o

drivers/staging/skein/include/brg_types.h

@@ -46,83 +46,26 @@
 extern "C" {
 #endif
 
-#include <limits.h>
-
 #ifndef BRG_UI8
 #  define BRG_UI8
-#  if UCHAR_MAX == 255u
      typedef unsigned char uint_8t;
-#  else
-#    error Please define uint_8t as an 8-bit unsigned integer type in brg_types.h
-#  endif
 #endif
 
 #ifndef BRG_UI16
 #  define BRG_UI16
-#  if USHRT_MAX == 65535u
      typedef unsigned short uint_16t;
-#  else
-#    error Please define uint_16t as a 16-bit unsigned short type in brg_types.h
-#  endif
 #endif
 
 #ifndef BRG_UI32
 #  define BRG_UI32
-#  if UINT_MAX == 4294967295u
 #    define li_32(h) 0x##h##u
      typedef unsigned int uint_32t;
-#  elif ULONG_MAX == 4294967295u
-#    define li_32(h) 0x##h##ul
-     typedef unsigned long uint_32t;
-#  elif defined( _CRAY )
-#    error This code needs 32-bit data types, which Cray machines do not provide
-#  else
-#    error Please define uint_32t as a 32-bit unsigned integer type in brg_types.h
-#  endif
 #endif
 
 #ifndef BRG_UI64
-#  if defined( __BORLANDC__ ) && !defined( __MSDOS__ )
-#    define BRG_UI64
-#    define li_64(h) 0x##h##ui64
-     typedef unsigned __int64 uint_64t;
-#  elif defined( _MSC_VER ) && ( _MSC_VER < 1300 )    /* 1300 == VC++ 7.0 */
-#    define BRG_UI64
-#    define li_64(h) 0x##h##ui64
-     typedef unsigned __int64 uint_64t;
-#  elif defined( __sun ) && defined(ULONG_MAX) && ULONG_MAX == 0xfffffffful
-#    define BRG_UI64
-#    define li_64(h) 0x##h##ull
-     typedef unsigned long long uint_64t;
-#  elif defined( UINT_MAX ) && UINT_MAX > 4294967295u
-#    if UINT_MAX == 18446744073709551615u
-#      define BRG_UI64
-#      define li_64(h) 0x##h##u
-       typedef unsigned int uint_64t;
-#    endif
-#  elif defined( ULONG_MAX ) && ULONG_MAX > 4294967295u
-#    if ULONG_MAX == 18446744073709551615ul
-#      define BRG_UI64
-#      define li_64(h) 0x##h##ul
-       typedef unsigned long uint_64t;
-#    endif
-#  elif defined( ULLONG_MAX ) && ULLONG_MAX > 4294967295u
-#    if ULLONG_MAX == 18446744073709551615ull
-#      define BRG_UI64
-#      define li_64(h) 0x##h##ull
-       typedef unsigned long long uint_64t;
-#    endif
-#  elif defined( ULONG_LONG_MAX ) && ULONG_LONG_MAX > 4294967295u
-#    if ULONG_LONG_MAX == 18446744073709551615ull
 #      define BRG_UI64
 #      define li_64(h) 0x##h##ull
        typedef unsigned long long uint_64t;
-#    endif
-#  elif defined(__GNUC__)  /* DLW: avoid mingw problem with -ansi */
-#      define BRG_UI64
-#      define li_64(h) 0x##h##ull
-       typedef unsigned long long uint_64t;
-#  endif
 #endif
 
 #if defined( NEED_UINT_64T ) && !defined( BRG_UI64 )

drivers/staging/skein/include/skein.h

@@ -261,18 +261,8 @@ int  Skein1024_Output   (Skein1024_Ctxt_t *ctx, u08b_t * hashVal);
 #define Skein_Show_Key(bits,ctx,key,keyBytes)
 #endif
 
-#ifndef SKEIN_ERR_CHECK        /* run-time checks (e.g., bad params, uninitialized context)? */
 #define Skein_Assert(x,retCode)/* default: ignore all Asserts, for performance */
 #define Skein_assert(x)
-#elif   defined(SKEIN_ASSERT)
-#include <assert.h>     
-#define Skein_Assert(x,retCode) assert(x) 
-#define Skein_assert(x)         assert(x) 
-#else
-#include <assert.h>     
-#define Skein_Assert(x,retCode) { if (!(x)) return retCode; } /*  caller  error */
-#define Skein_assert(x)         assert(x)                     /* internal error */
-#endif
 
 /*****************************************************************
 ** Skein block function constants (shared across Ref and Opt code)

drivers/staging/skein/include/skeinApi.h

@@ -78,8 +78,8 @@ OTHER DEALINGS IN THE SOFTWARE.
  * 
  */
 
+#include <linux/types.h>
 #include <skein.h>
-#include <stdint.h>
 
 #ifdef __cplusplus
 extern "C"

drivers/staging/skein/include/skein_port.h

@@ -44,24 +44,10 @@ typedef uint_64t        u64b_t;             /* 64-bit unsigned integer */
  * platform-specific code instead (e.g., for big-endian CPUs).
  *
  */
-#ifndef SKEIN_NEED_SWAP /* compile-time "override" for endianness? */
-
-#include <brg_endian.h>              /* get endianness selection */
-#if   PLATFORM_BYTE_ORDER == IS_BIG_ENDIAN
-    /* here for big-endian CPUs */
-#define SKEIN_NEED_SWAP   (1)
-#elif PLATFORM_BYTE_ORDER == IS_LITTLE_ENDIAN
-    /* here for x86 and x86-64 CPUs (and other detected little-endian CPUs) */
 #define SKEIN_NEED_SWAP   (0)
-#if   PLATFORM_MUST_ALIGN == 0              /* ok to use "fast" versions? */
+/* below two prototype assume we are handed aligned data */
 #define Skein_Put64_LSB_First(dst08,src64,bCnt) memcpy(dst08,src64,bCnt)
 #define Skein_Get64_LSB_First(dst64,src08,wCnt) memcpy(dst64,src08,8*(wCnt))
-#endif
-#else
-#error "Skein needs endianness setting!"
-#endif
-
-#endif /* ifndef SKEIN_NEED_SWAP */
 
 /*
  ******************************************************************

drivers/staging/skein/include/threefishApi.h

@@ -28,8 +28,8 @@
 @endcode
  */
 
+#include <linux/types.h>
 #include <skein.h>
-#include <stdint.h>
 
 #define KeyScheduleConst 0x1BD11BDAA9FC1A22L
 

drivers/staging/skein/skein.c

@@ -10,7 +10,7 @@
 
 #define  SKEIN_PORT_CODE /* instantiate any code in skein_port.h */
 
-#include <string.h>       /* get the memcpy/memset functions */
+#include <linux/string.h>       /* get the memcpy/memset functions */
 #include <skein.h> /* get the Skein API definitions   */
 #include <skein_iv.h>    /* get precomputed IVs */
 

drivers/staging/skein/skeinApi.c

@@ -24,10 +24,8 @@ OTHER DEALINGS IN THE SOFTWARE.
 
 */
 
-#define SKEIN_ERR_CHECK 1
+#include <linux/string.h>
 #include <skeinApi.h>
-#include <string.h>
-#include <stdio.h>
 
 int skeinCtxPrepare(SkeinCtx_t* ctx, SkeinSize_t size)
 {

drivers/staging/skein/skeinBlockNo3F.c

@@ -1,5 +1,5 @@
 
-#include <string.h>
+#include <linux/string.h>
 #include <skein.h>
 #include <threefishApi.h>
 

drivers/staging/skein/skein_block.c

@@ -14,7 +14,7 @@
 **
 ************************************************************************/
 
-#include <string.h>
+#include <linux/string.h>
 #include <skein.h>
 
 #ifndef SKEIN_USE_ASM

drivers/staging/skein/threefish1024Block.c

@@ -1,6 +1,5 @@
+#include <linux/string.h>
 #include <threefishApi.h>
-#include <stdint.h>
-#include <string.h>
 
 
 void threefishEncrypt1024(ThreefishKey_t* keyCtx, uint64_t* input, uint64_t* output)

drivers/staging/skein/threefish256Block.c

@@ -1,6 +1,5 @@
+#include <linux/string.h>
 #include <threefishApi.h>
-#include <stdint.h>
-#include <string.h>
 
 
 void threefishEncrypt256(ThreefishKey_t* keyCtx, uint64_t* input, uint64_t* output)

drivers/staging/skein/threefish512Block.c

@@ -1,6 +1,5 @@
+#include <linux/string.h>
 #include <threefishApi.h>
-#include <stdint.h>
-#include <string.h>
 
 
 void threefishEncrypt512(ThreefishKey_t* keyCtx, uint64_t* input, uint64_t* output)

drivers/staging/skein/threefishApi.c

@@ -1,8 +1,7 @@
 
 
+#include <linux/string.h>
 #include <threefishApi.h>
-#include <stdlib.h>
-#include <string.h>
 
 void threefishSetKey(ThreefishKey_t* keyCtx, ThreefishSize_t stateSize,
                      uint64_t* keyData, uint64_t* tweak)