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Commit ee55fe55 authored by Jason Cooper's avatar Jason Cooper Committed by Greg Kroah-Hartman
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staging/skein: Remove Skein and Threefish code 

It's been four years since this was added.  In the interim, skein has
not seen any mainstream adoption.  Same with the threefish block cipher
upon which it's based.

In the discussion over which hash algorithm will replace SHA1 in git,
it's not one of the contenders.

There's absolutely no reason to think that there is anything wrong with
Skein or Threefish.  The only reason for this removal is a lack of
adoption.

If a real user comes forward, I'd be happy to assist with integrating
this code into mainline.
Signed-off-by: default avatarJason Cooper <jason@lakedaemon.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 7f5d8f71
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drivers/staging/Kconfig
View file @ ee55fe55
...@@ -84,8 +84,6 @@ source "drivers/staging/dgnc/Kconfig" ...@@ -84,8 +84,6 @@ source "drivers/staging/dgnc/Kconfig"
source "drivers/staging/gs_fpgaboot/Kconfig" source "drivers/staging/gs_fpgaboot/Kconfig"
source "drivers/staging/skein/Kconfig"
source "drivers/staging/unisys/Kconfig" source "drivers/staging/unisys/Kconfig"
source "drivers/staging/clocking-wizard/Kconfig" source "drivers/staging/clocking-wizard/Kconfig"
......
drivers/staging/Makefile
View file @ ee55fe55
...@@ -33,7 +33,6 @@ obj-$(CONFIG_GOLDFISH) += goldfish/ ...@@ -33,7 +33,6 @@ obj-$(CONFIG_GOLDFISH) += goldfish/
obj-$(CONFIG_DGNC) += dgnc/ obj-$(CONFIG_DGNC) += dgnc/
obj-$(CONFIG_MTD_SPINAND_MT29F) += mt29f_spinand/ obj-$(CONFIG_MTD_SPINAND_MT29F) += mt29f_spinand/
obj-$(CONFIG_GS_FPGABOOT) += gs_fpgaboot/ obj-$(CONFIG_GS_FPGABOOT) += gs_fpgaboot/
obj-$(CONFIG_CRYPTO_SKEIN) += skein/
obj-$(CONFIG_UNISYSSPAR) += unisys/ obj-$(CONFIG_UNISYSSPAR) += unisys/
obj-$(CONFIG_COMMON_CLK_XLNX_CLKWZRD) += clocking-wizard/ obj-$(CONFIG_COMMON_CLK_XLNX_CLKWZRD) += clocking-wizard/
obj-$(CONFIG_FB_TFT) += fbtft/ obj-$(CONFIG_FB_TFT) += fbtft/
......
drivers/staging/skein/Kconfig deleted 100644 → 0
View file @ 7f5d8f71
config CRYPTO_SKEIN
tristate "Skein digest algorithm"
depends on (X86 || UML_X86) && 64BIT && CRYPTO
select CRYPTO_HASH
select CRYPTO_ALGAPI
help
Skein secure hash algorithm is one of 5 finalists from the NIST SHA3
competition.
Skein is optimized for modern, 64bit processors and is highly
customizable. See:
http://www.skein-hash.info/sites/default/files/skein1.3.pdf
for more information. This module also contains the threefish block
cipher algorithm.
drivers/staging/skein/Makefile deleted 100644 → 0
View file @ 7f5d8f71
# SPDX-License-Identifier: GPL-2.0
#
# Makefile for the skein secure hash algorithm
#
obj-$(CONFIG_CRYPTO_SKEIN) += skein.o
skein-y := skein_base.o \
skein_api.o \
skein_block.o \
threefish_block.o \
threefish_api.o \
skein_generic.o
drivers/staging/skein/TODO deleted 100644 → 0
View file @ 7f5d8f71
skein/threefish TODO
- move macros into appropriate header files
- add / pass test vectors
- module support
Please send patches to Jason Cooper <jason@lakedaemon.net> in addition to the
staging tree mailinglist.
drivers/staging/skein/skein_api.c deleted 100644 → 0
View file @ 7f5d8f71
/*
* Copyright (c) 2010 Werner Dittmann
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#include <linux/string.h>
#include "skein_api.h"
int skein_ctx_prepare(struct skein_ctx *ctx, enum skein_size size)
{
skein_assert_ret(ctx && size, SKEIN_FAIL);
memset(ctx, 0, sizeof(struct skein_ctx));
ctx->skein_size = size;
return SKEIN_SUCCESS;
}
int skein_init(struct skein_ctx *ctx, size_t hash_bit_len)
{
int ret = SKEIN_FAIL;
size_t x_len = 0;
u64 *x = NULL;
u64 tree_info = SKEIN_CFG_TREE_INFO_SEQUENTIAL;
skein_assert_ret(ctx, SKEIN_FAIL);
/*
* The following two lines rely of the fact that the real Skein
* contexts are a union in out context and thus have tha maximum
* memory available. The beauty of C :-) .
*/
x = ctx->m.s256.x;
x_len = ctx->skein_size / 8;
/*
* If size is the same and hash bit length is zero then reuse
* the save chaining variables.
*/
switch (ctx->skein_size) {
case SKEIN_256:
ret = skein_256_init_ext(&ctx->m.s256, hash_bit_len,
tree_info, NULL, 0);
break;
case SKEIN_512:
ret = skein_512_init_ext(&ctx->m.s512, hash_bit_len,
tree_info, NULL, 0);
break;
case SKEIN_1024:
ret = skein_1024_init_ext(&ctx->m.s1024, hash_bit_len,
tree_info, NULL, 0);
break;
}
if (ret == SKEIN_SUCCESS) {
/*
* Save chaining variables for this combination of size and
* hash_bit_len
*/
memcpy(ctx->x_save, x, x_len);
}
return ret;
}
int skein_mac_init(struct skein_ctx *ctx, const u8 *key, size_t key_len,
size_t hash_bit_len)
{
int ret = SKEIN_FAIL;
u64 *x = NULL;
size_t x_len = 0;
u64 tree_info = SKEIN_CFG_TREE_INFO_SEQUENTIAL;
skein_assert_ret(ctx, SKEIN_FAIL);
x = ctx->m.s256.x;
x_len = ctx->skein_size / 8;
skein_assert_ret(hash_bit_len, SKEIN_BAD_HASHLEN);
switch (ctx->skein_size) {
case SKEIN_256:
ret = skein_256_init_ext(&ctx->m.s256, hash_bit_len,
tree_info, key, key_len);
break;
case SKEIN_512:
ret = skein_512_init_ext(&ctx->m.s512, hash_bit_len,
tree_info, key, key_len);
break;
case SKEIN_1024:
ret = skein_1024_init_ext(&ctx->m.s1024, hash_bit_len,
tree_info, key, key_len);
break;
}
if (ret == SKEIN_SUCCESS) {
/*
* Save chaining variables for this combination of key,
* key_len, hash_bit_len
*/
memcpy(ctx->x_save, x, x_len);
}
return ret;
}
void skein_reset(struct skein_ctx *ctx)
{
size_t x_len = 0;
u64 *x;
/*
* The following two lines rely of the fact that the real Skein
* contexts are a union in out context and thus have tha maximum
* memory available. The beautiy of C :-) .
*/
x = ctx->m.s256.x;
x_len = ctx->skein_size / 8;
/* Restore the chaing variable, reset byte counter */
memcpy(x, ctx->x_save, x_len);
/* Setup context to process the message */
skein_start_new_type(&ctx->m, MSG);
}
int skein_update(struct skein_ctx *ctx, const u8 *msg,
size_t msg_byte_cnt)
{
int ret = SKEIN_FAIL;
skein_assert_ret(ctx, SKEIN_FAIL);
switch (ctx->skein_size) {
case SKEIN_256:
ret = skein_256_update(&ctx->m.s256, msg, msg_byte_cnt);
break;
case SKEIN_512:
ret = skein_512_update(&ctx->m.s512, msg, msg_byte_cnt);
break;
case SKEIN_1024:
ret = skein_1024_update(&ctx->m.s1024, msg, msg_byte_cnt);
break;
}
return ret;
}
int skein_update_bits(struct skein_ctx *ctx, const u8 *msg,
size_t msg_bit_cnt)
{
/*
* I've used the bit pad implementation from skein_test.c (see NIST CD)
* and modified it to use the convenience functions and added some
* pointer arithmetic.
*/
size_t length;
u8 mask;
u8 *up;
/*
* only the final Update() call is allowed do partial bytes, else
* assert an error
*/
skein_assert_ret((ctx->m.h.T[1] & SKEIN_T1_FLAG_BIT_PAD) == 0 ||
msg_bit_cnt == 0, SKEIN_FAIL);
/* if number of bits is a multiple of bytes - that's easy */
if ((msg_bit_cnt & 0x7) == 0)
return skein_update(ctx, msg, msg_bit_cnt >> 3);
skein_update(ctx, msg, (msg_bit_cnt >> 3) + 1);
/*
* The next line rely on the fact that the real Skein contexts
* are a union in our context. After the addition the pointer points to
* Skein's real partial block buffer.
* If this layout ever changes we have to adapt this as well.
*/
up = (u8 *)ctx->m.s256.x + ctx->skein_size / 8;
/* set tweak flag for the skein_final call */
skein_set_bit_pad_flag(ctx->m.h);
/* now "pad" the final partial byte the way NIST likes */
/* get the b_cnt value (same location for all block sizes) */
length = ctx->m.h.b_cnt;
/* internal sanity check: there IS a partial byte in the buffer! */
skein_assert(length != 0);
/* partial byte bit mask */
mask = (u8)(1u << (7 - (msg_bit_cnt & 7)));
/* apply bit padding on final byte (in the buffer) */
up[length - 1] = (up[length - 1] & (0 - mask)) | mask;
return SKEIN_SUCCESS;
}
int skein_final(struct skein_ctx *ctx, u8 *hash)
{
int ret = SKEIN_FAIL;
skein_assert_ret(ctx, SKEIN_FAIL);
switch (ctx->skein_size) {
case SKEIN_256:
ret = skein_256_final(&ctx->m.s256, hash);
break;
case SKEIN_512:
ret = skein_512_final(&ctx->m.s512, hash);
break;
case SKEIN_1024:
ret = skein_1024_final(&ctx->m.s1024, hash);
break;
}
return ret;
}
drivers/staging/skein/skein_api.h deleted 100644 → 0
View file @ 7f5d8f71
/**
* Copyright (c) 2010 Werner Dittmann
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef SKEINAPI_H
#define SKEINAPI_H
/**
* @file skein_api.h
* @brief A Skein API and its functions.
* @{
*
* This API and the functions that implement this API simplify the usage
* of Skein. The design and the way to use the functions follow the openSSL
* design but at the same time take care of some Skein specific behaviour
* and possibilities.
*
* The functions enable applications to create a normal Skein hashes and
* message authentication codes (MAC).
*
* Using these functions is simple and straight forward:
*
* @code
*
* #include "skein_api.h"
*
* ...
* struct skein_ctx ctx; // a Skein hash or MAC context
*
* // prepare context, here for a Skein with a state size of 512 bits.
* skein_ctx_prepare(&ctx, SKEIN_512);
*
* // Initialize the context to set the requested hash length in bits
* // here request a output hash size of 31 bits (Skein supports variable
* // output sizes even very strange sizes)
* skein_init(&ctx, 31);
*
* // Now update Skein with any number of message bits. A function that
* // takes a number of bytes is also available.
* skein_update_bits(&ctx, message, msg_length);
*
* // Now get the result of the Skein hash. The output buffer must be
* // large enough to hold the request number of output bits. The application
* // may now extract the bits.
* skein_final(&ctx, result);
* ...
* @endcode
*
* An application may use @c skein_reset to reset a Skein context and use
* it for creation of another hash with the same Skein state size and output
* bit length. In this case the API implementation restores some internal
* internal state data and saves a full Skein initialization round.
*
* To create a MAC the application just uses @c skein_mac_init instead of
* @c skein_init. All other functions calls remain the same.
*
*/
#include <linux/types.h>
#include "skein_base.h"
/**
* Which Skein size to use
*/
enum skein_size {
SKEIN_256 = 256, /*!< Skein with 256 bit state */
SKEIN_512 = 512, /*!< Skein with 512 bit state */
SKEIN_1024 = 1024 /*!< Skein with 1024 bit state */
};
/**
* Context for Skein.
*
* This structure was setup with some know-how of the internal
* Skein structures, in particular ordering of header and size dependent
* variables. If Skein implementation changes this, then adapt these
* structures as well.
*/
struct skein_ctx {
u64 skein_size;
u64 x_save[SKEIN_MAX_STATE_WORDS]; /* save area for state variables */
union {
struct skein_ctx_hdr h;
struct skein_256_ctx s256;
struct skein_512_ctx s512;
struct skein_1024_ctx s1024;
} m;
};
/**
* Prepare a Skein context.
*
* An application must call this function before it can use the Skein
* context. The functions clears memory and initializes size dependent
* variables.
*
* @param ctx
* Pointer to a Skein context.
* @param size
* Which Skein size to use.
* @return
* SKEIN_SUCCESS of SKEIN_FAIL
*/
int skein_ctx_prepare(struct skein_ctx *ctx, enum skein_size size);
/**
* Initialize a Skein context.
*
* Initializes the context with this data and saves the resulting Skein
* state variables for further use.
*
* @param ctx
* Pointer to a Skein context.
* @param hash_bit_len
* Number of MAC hash bits to compute
* @return
* SKEIN_SUCCESS of SKEIN_FAIL
* @see skein_reset
*/
int skein_init(struct skein_ctx *ctx, size_t hash_bit_len);
/**
* Resets a Skein context for further use.
*
* Restores the saved chaining variables to reset the Skein context.
* Thus applications can reuse the same setup to process several
* messages. This saves a complete Skein initialization cycle.
*
* @param ctx
* Pointer to a pre-initialized Skein MAC context
*/
void skein_reset(struct skein_ctx *ctx);
/**
* Initializes a Skein context for MAC usage.
*
* Initializes the context with this data and saves the resulting Skein
* state variables for further use.
*
* Applications call the normal Skein functions to update the MAC and
* get the final result.
*
* @param ctx
* Pointer to an empty or preinitialized Skein MAC context
* @param key
* Pointer to key bytes or NULL
* @param key_len
* Length of the key in bytes or zero
* @param hash_bit_len
* Number of MAC hash bits to compute
* @return
* SKEIN_SUCCESS of SKEIN_FAIL
*/
int skein_mac_init(struct skein_ctx *ctx, const u8 *key, size_t key_len,
size_t hash_bit_len);
/**
* Update Skein with the next part of the message.
*
* @param ctx
* Pointer to initialized Skein context
* @param msg
* Pointer to the message.
* @param msg_byte_cnt
* Length of the message in @b bytes
* @return
* Success or error code.
*/
int skein_update(struct skein_ctx *ctx, const u8 *msg,
size_t msg_byte_cnt);
/**
* Update the hash with a message bit string.
*
* Skein can handle data not only as bytes but also as bit strings of
* arbitrary length (up to its maximum design size).
*
* @param ctx
* Pointer to initialized Skein context
* @param msg
* Pointer to the message.
* @param msg_bit_cnt
* Length of the message in @b bits.
*/
int skein_update_bits(struct skein_ctx *ctx, const u8 *msg,
size_t msg_bit_cnt);
/**
* Finalize Skein and return the hash.
*
* Before an application can reuse a Skein setup the application must
* reset the Skein context.
*
* @param ctx
* Pointer to initialized Skein context
* @param hash
* Pointer to buffer that receives the hash. The buffer must be large
* enough to store @c hash_bit_len bits.
* @return
* Success or error code.
* @see skein_reset
*/
int skein_final(struct skein_ctx *ctx, u8 *hash);
/**
* @}
*/
#endif
drivers/staging/skein/skein_base.c deleted 100644 → 0
View file @ 7f5d8f71
/***********************************************************************
**
** Implementation of the Skein hash function.
**
** Source code author: Doug Whiting, 2008.
**
** This algorithm and source code is released to the public domain.
**
************************************************************************/
#include <linux/string.h> /* get the memcpy/memset functions */
#include <linux/export.h>
#include "skein_base.h" /* get the Skein API definitions */
#include "skein_iv.h" /* get precomputed IVs */
#include "skein_block.h"
/*****************************************************************/
/* 256-bit Skein */
/*****************************************************************/
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
/* init the context for a straight hashing operation */
int skein_256_init(struct skein_256_ctx *ctx, size_t hash_bit_len)
{
union {
u8 b[SKEIN_256_STATE_BYTES];
u64 w[SKEIN_256_STATE_WORDS];
} cfg; /* config block */
skein_assert_ret(hash_bit_len > 0, SKEIN_BAD_HASHLEN);
ctx->h.hash_bit_len = hash_bit_len; /* output hash bit count */
switch (hash_bit_len) { /* use pre-computed values, where available */
case 256:
memcpy(ctx->x, SKEIN_256_IV_256, sizeof(ctx->x));
break;
case 224:
memcpy(ctx->x, SKEIN_256_IV_224, sizeof(ctx->x));
break;
case 160:
memcpy(ctx->x, SKEIN_256_IV_160, sizeof(ctx->x));
break;
case 128:
memcpy(ctx->x, SKEIN_256_IV_128, sizeof(ctx->x));
break;
default:
/* here if there is no precomputed IV value available */
/*
* build/process the config block, type == CONFIG (could be
* precomputed)
*/
/* set tweaks: T0=0; T1=CFG | FINAL */
skein_start_new_type(ctx, CFG_FINAL);
/* set the schema, version */
cfg.w[0] = skein_swap64(SKEIN_SCHEMA_VER);
/* hash result length in bits */
cfg.w[1] = skein_swap64(hash_bit_len);
cfg.w[2] = skein_swap64(SKEIN_CFG_TREE_INFO_SEQUENTIAL);
/* zero pad config block */
memset(&cfg.w[3], 0, sizeof(cfg) - 3 * sizeof(cfg.w[0]));
/* compute the initial chaining values from config block */
/* zero the chaining variables */
memset(ctx->x, 0, sizeof(ctx->x));
skein_256_process_block(ctx, cfg.b, 1, SKEIN_CFG_STR_LEN);
break;
}
/* The chaining vars ctx->x are now initialized for hash_bit_len. */
/* Set up to process the data message portion of the hash (default) */
skein_start_new_type(ctx, MSG); /* T0=0, T1= MSG type */
return SKEIN_SUCCESS;
}
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
/* init the context for a MAC and/or tree hash operation */
/*
* [identical to skein_256_init() when key_bytes == 0 && \
* tree_info == SKEIN_CFG_TREE_INFO_SEQUENTIAL]
*/
int skein_256_init_ext(struct skein_256_ctx *ctx, size_t hash_bit_len,
u64 tree_info, const u8 *key, size_t key_bytes)
{
union {
u8 b[SKEIN_256_STATE_BYTES];
u64 w[SKEIN_256_STATE_WORDS];
} cfg; /* config block */
skein_assert_ret(hash_bit_len > 0, SKEIN_BAD_HASHLEN);
skein_assert_ret(key_bytes == 0 || key, SKEIN_FAIL);
/* compute the initial chaining values ctx->x[], based on key */
if (key_bytes == 0) { /* is there a key? */
/* no key: use all zeroes as key for config block */
memset(ctx->x, 0, sizeof(ctx->x));
} else { /* here to pre-process a key */
skein_assert(sizeof(cfg.b) >= sizeof(ctx->x));
/* do a mini-Init right here */
/* set output hash bit count = state size */
ctx->h.hash_bit_len = 8 * sizeof(ctx->x);
/* set tweaks: T0 = 0; T1 = KEY type */
skein_start_new_type(ctx, KEY);
/* zero the initial chaining variables */
memset(ctx->x, 0, sizeof(ctx->x));
/* hash the key */
skein_256_update(ctx, key, key_bytes);
/* put result into cfg.b[] */
skein_256_final_pad(ctx, cfg.b);
/* copy over into ctx->x[] */
memcpy(ctx->x, cfg.b, sizeof(cfg.b));
}
/*
* build/process the config block, type == CONFIG (could be
* precomputed for each key)
*/
/* output hash bit count */
ctx->h.hash_bit_len = hash_bit_len;
skein_start_new_type(ctx, CFG_FINAL);
/* pre-pad cfg.w[] with zeroes */
memset(&cfg.w, 0, sizeof(cfg.w));
cfg.w[0] = skein_swap64(SKEIN_SCHEMA_VER);
/* hash result length in bits */
cfg.w[1] = skein_swap64(hash_bit_len);
/* tree hash config info (or SKEIN_CFG_TREE_INFO_SEQUENTIAL) */
cfg.w[2] = skein_swap64(tree_info);
/* compute the initial chaining values from config block */
skein_256_process_block(ctx, cfg.b, 1, SKEIN_CFG_STR_LEN);
/* The chaining vars ctx->x are now initialized */
/* Set up to process the data message portion of the hash (default) */
skein_start_new_type(ctx, MSG);
return SKEIN_SUCCESS;
}
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
/* process the input bytes */
int skein_256_update(struct skein_256_ctx *ctx, const u8 *msg,
size_t msg_byte_cnt)
{
size_t n;
/* catch uninitialized context */
skein_assert_ret(ctx->h.b_cnt <= SKEIN_256_BLOCK_BYTES, SKEIN_FAIL);
/* process full blocks, if any */
if (msg_byte_cnt + ctx->h.b_cnt > SKEIN_256_BLOCK_BYTES) {
/* finish up any buffered message data */
if (ctx->h.b_cnt) {
/* # bytes free in buffer b[] */
n = SKEIN_256_BLOCK_BYTES - ctx->h.b_cnt;
if (n) {
/* check on our logic here */
skein_assert(n < msg_byte_cnt);
memcpy(&ctx->b[ctx->h.b_cnt], msg, n);
msg_byte_cnt -= n;
msg += n;
ctx->h.b_cnt += n;
}
skein_assert(ctx->h.b_cnt == SKEIN_256_BLOCK_BYTES);
skein_256_process_block(ctx, ctx->b, 1,
SKEIN_256_BLOCK_BYTES);
ctx->h.b_cnt = 0;
}
/*
* now process any remaining full blocks, directly from input
* message data
*/
if (msg_byte_cnt > SKEIN_256_BLOCK_BYTES) {
/* number of full blocks to process */
n = (msg_byte_cnt - 1) / SKEIN_256_BLOCK_BYTES;
skein_256_process_block(ctx, msg, n,
SKEIN_256_BLOCK_BYTES);
msg_byte_cnt -= n * SKEIN_256_BLOCK_BYTES;
msg += n * SKEIN_256_BLOCK_BYTES;
}
skein_assert(ctx->h.b_cnt == 0);
}
/* copy any remaining source message data bytes into b[] */
if (msg_byte_cnt) {
skein_assert(msg_byte_cnt + ctx->h.b_cnt <=
SKEIN_256_BLOCK_BYTES);
memcpy(&ctx->b[ctx->h.b_cnt], msg, msg_byte_cnt);
ctx->h.b_cnt += msg_byte_cnt;
}
return SKEIN_SUCCESS;
}
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
/* finalize the hash computation and output the result */
int skein_256_final(struct skein_256_ctx *ctx, u8 *hash_val)
{
size_t i, n, byte_cnt;
u64 x[SKEIN_256_STATE_WORDS];
/* catch uninitialized context */
skein_assert_ret(ctx->h.b_cnt <= SKEIN_256_BLOCK_BYTES, SKEIN_FAIL);
/* tag as the final block */
ctx->h.tweak[1] |= SKEIN_T1_FLAG_FINAL;
/* zero pad b[] if necessary */
if (ctx->h.b_cnt < SKEIN_256_BLOCK_BYTES)
memset(&ctx->b[ctx->h.b_cnt], 0,
SKEIN_256_BLOCK_BYTES - ctx->h.b_cnt);
/* process the final block */
skein_256_process_block(ctx, ctx->b, 1, ctx->h.b_cnt);
/* now output the result */
/* total number of output bytes */
byte_cnt = (ctx->h.hash_bit_len + 7) >> 3;
/* run Threefish in "counter mode" to generate output */
/* zero out b[], so it can hold the counter */
memset(ctx->b, 0, sizeof(ctx->b));
/* keep a local copy of counter mode "key" */
memcpy(x, ctx->x, sizeof(x));
for (i = 0; i * SKEIN_256_BLOCK_BYTES < byte_cnt; i++) {
/* build the counter block */
((u64 *)ctx->b)[0] = skein_swap64((u64)i);
skein_start_new_type(ctx, OUT_FINAL);
/* run "counter mode" */
skein_256_process_block(ctx, ctx->b, 1, sizeof(u64));
/* number of output bytes left to go */
n = byte_cnt - i * SKEIN_256_BLOCK_BYTES;
if (n >= SKEIN_256_BLOCK_BYTES)
n = SKEIN_256_BLOCK_BYTES;
/* "output" the ctr mode bytes */
skein_put64_lsb_first(hash_val + (i * SKEIN_256_BLOCK_BYTES),
ctx->x, n);
/* restore the counter mode key for next time */
memcpy(ctx->x, x, sizeof(x));
}
return SKEIN_SUCCESS;
}
/*****************************************************************/
/* 512-bit Skein */
/*****************************************************************/
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
/* init the context for a straight hashing operation */
int skein_512_init(struct skein_512_ctx *ctx, size_t hash_bit_len)
{
union {
u8 b[SKEIN_512_STATE_BYTES];
u64 w[SKEIN_512_STATE_WORDS];
} cfg; /* config block */
skein_assert_ret(hash_bit_len > 0, SKEIN_BAD_HASHLEN);
ctx->h.hash_bit_len = hash_bit_len; /* output hash bit count */
switch (hash_bit_len) { /* use pre-computed values, where available */
case 512:
memcpy(ctx->x, SKEIN_512_IV_512, sizeof(ctx->x));
break;
case 384:
memcpy(ctx->x, SKEIN_512_IV_384, sizeof(ctx->x));
break;
case 256:
memcpy(ctx->x, SKEIN_512_IV_256, sizeof(ctx->x));
break;
case 224:
memcpy(ctx->x, SKEIN_512_IV_224, sizeof(ctx->x));
break;
default:
/* here if there is no precomputed IV value available */
/*
* build/process the config block, type == CONFIG (could be
* precomputed)
*/
/* set tweaks: T0=0; T1=CFG | FINAL */
skein_start_new_type(ctx, CFG_FINAL);
/* set the schema, version */
cfg.w[0] = skein_swap64(SKEIN_SCHEMA_VER);
/* hash result length in bits */
cfg.w[1] = skein_swap64(hash_bit_len);
cfg.w[2] = skein_swap64(SKEIN_CFG_TREE_INFO_SEQUENTIAL);
/* zero pad config block */
memset(&cfg.w[3], 0, sizeof(cfg) - 3 * sizeof(cfg.w[0]));
/* compute the initial chaining values from config block */
/* zero the chaining variables */
memset(ctx->x, 0, sizeof(ctx->x));
skein_512_process_block(ctx, cfg.b, 1, SKEIN_CFG_STR_LEN);
break;
}
/*
* The chaining vars ctx->x are now initialized for the given
* hash_bit_len.
*/
/* Set up to process the data message portion of the hash (default) */
skein_start_new_type(ctx, MSG); /* T0=0, T1= MSG type */
return SKEIN_SUCCESS;
}
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
/* init the context for a MAC and/or tree hash operation */
/*
* [identical to skein_512_init() when key_bytes == 0 && \
* tree_info == SKEIN_CFG_TREE_INFO_SEQUENTIAL]
*/
int skein_512_init_ext(struct skein_512_ctx *ctx, size_t hash_bit_len,
u64 tree_info, const u8 *key, size_t key_bytes)
{
union {
u8 b[SKEIN_512_STATE_BYTES];
u64 w[SKEIN_512_STATE_WORDS];
} cfg; /* config block */
skein_assert_ret(hash_bit_len > 0, SKEIN_BAD_HASHLEN);
skein_assert_ret(key_bytes == 0 || key, SKEIN_FAIL);
/* compute the initial chaining values ctx->x[], based on key */
if (key_bytes == 0) { /* is there a key? */
/* no key: use all zeroes as key for config block */
memset(ctx->x, 0, sizeof(ctx->x));
} else { /* here to pre-process a key */
skein_assert(sizeof(cfg.b) >= sizeof(ctx->x));
/* do a mini-Init right here */
/* set output hash bit count = state size */
ctx->h.hash_bit_len = 8 * sizeof(ctx->x);
/* set tweaks: T0 = 0; T1 = KEY type */
skein_start_new_type(ctx, KEY);
/* zero the initial chaining variables */
memset(ctx->x, 0, sizeof(ctx->x));
/* hash the key */
skein_512_update(ctx, key, key_bytes);
/* put result into cfg.b[] */
skein_512_final_pad(ctx, cfg.b);
/* copy over into ctx->x[] */
memcpy(ctx->x, cfg.b, sizeof(cfg.b));
}
/*
* build/process the config block, type == CONFIG (could be
* precomputed for each key)
*/
ctx->h.hash_bit_len = hash_bit_len; /* output hash bit count */
skein_start_new_type(ctx, CFG_FINAL);
/* pre-pad cfg.w[] with zeroes */
memset(&cfg.w, 0, sizeof(cfg.w));
cfg.w[0] = skein_swap64(SKEIN_SCHEMA_VER);
/* hash result length in bits */
cfg.w[1] = skein_swap64(hash_bit_len);
/* tree hash config info (or SKEIN_CFG_TREE_INFO_SEQUENTIAL) */
cfg.w[2] = skein_swap64(tree_info);
/* compute the initial chaining values from config block */
skein_512_process_block(ctx, cfg.b, 1, SKEIN_CFG_STR_LEN);
/* The chaining vars ctx->x are now initialized */
/* Set up to process the data message portion of the hash (default) */
skein_start_new_type(ctx, MSG);
return SKEIN_SUCCESS;
}
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
/* process the input bytes */
int skein_512_update(struct skein_512_ctx *ctx, const u8 *msg,
size_t msg_byte_cnt)
{
size_t n;
/* catch uninitialized context */
skein_assert_ret(ctx->h.b_cnt <= SKEIN_512_BLOCK_BYTES, SKEIN_FAIL);
/* process full blocks, if any */
if (msg_byte_cnt + ctx->h.b_cnt > SKEIN_512_BLOCK_BYTES) {
/* finish up any buffered message data */
if (ctx->h.b_cnt) {
/* # bytes free in buffer b[] */
n = SKEIN_512_BLOCK_BYTES - ctx->h.b_cnt;
if (n) {
/* check on our logic here */
skein_assert(n < msg_byte_cnt);
memcpy(&ctx->b[ctx->h.b_cnt], msg, n);
msg_byte_cnt -= n;
msg += n;
ctx->h.b_cnt += n;
}
skein_assert(ctx->h.b_cnt == SKEIN_512_BLOCK_BYTES);
skein_512_process_block(ctx, ctx->b, 1,
SKEIN_512_BLOCK_BYTES);
ctx->h.b_cnt = 0;
}
/*
* now process any remaining full blocks, directly from input
* message data
*/
if (msg_byte_cnt > SKEIN_512_BLOCK_BYTES) {
/* number of full blocks to process */
n = (msg_byte_cnt - 1) / SKEIN_512_BLOCK_BYTES;
skein_512_process_block(ctx, msg, n,
SKEIN_512_BLOCK_BYTES);
msg_byte_cnt -= n * SKEIN_512_BLOCK_BYTES;
msg += n * SKEIN_512_BLOCK_BYTES;
}
skein_assert(ctx->h.b_cnt == 0);
}
/* copy any remaining source message data bytes into b[] */
if (msg_byte_cnt) {
skein_assert(msg_byte_cnt + ctx->h.b_cnt <=
SKEIN_512_BLOCK_BYTES);
memcpy(&ctx->b[ctx->h.b_cnt], msg, msg_byte_cnt);
ctx->h.b_cnt += msg_byte_cnt;
}
return SKEIN_SUCCESS;
}
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
/* finalize the hash computation and output the result */
int skein_512_final(struct skein_512_ctx *ctx, u8 *hash_val)
{
size_t i, n, byte_cnt;
u64 x[SKEIN_512_STATE_WORDS];
/* catch uninitialized context */
skein_assert_ret(ctx->h.b_cnt <= SKEIN_512_BLOCK_BYTES, SKEIN_FAIL);
/* tag as the final block */
ctx->h.tweak[1] |= SKEIN_T1_FLAG_FINAL;
/* zero pad b[] if necessary */
if (ctx->h.b_cnt < SKEIN_512_BLOCK_BYTES)
memset(&ctx->b[ctx->h.b_cnt], 0,
SKEIN_512_BLOCK_BYTES - ctx->h.b_cnt);
/* process the final block */
skein_512_process_block(ctx, ctx->b, 1, ctx->h.b_cnt);
/* now output the result */
/* total number of output bytes */
byte_cnt = (ctx->h.hash_bit_len + 7) >> 3;
/* run Threefish in "counter mode" to generate output */
/* zero out b[], so it can hold the counter */
memset(ctx->b, 0, sizeof(ctx->b));
/* keep a local copy of counter mode "key" */
memcpy(x, ctx->x, sizeof(x));
for (i = 0; i * SKEIN_512_BLOCK_BYTES < byte_cnt; i++) {
/* build the counter block */
((u64 *)ctx->b)[0] = skein_swap64((u64)i);
skein_start_new_type(ctx, OUT_FINAL);
/* run "counter mode" */
skein_512_process_block(ctx, ctx->b, 1, sizeof(u64));
/* number of output bytes left to go */
n = byte_cnt - i * SKEIN_512_BLOCK_BYTES;
if (n >= SKEIN_512_BLOCK_BYTES)
n = SKEIN_512_BLOCK_BYTES;
/* "output" the ctr mode bytes */
skein_put64_lsb_first(hash_val + (i * SKEIN_512_BLOCK_BYTES),
ctx->x, n);
/* restore the counter mode key for next time */
memcpy(ctx->x, x, sizeof(x));
}
return SKEIN_SUCCESS;
}
/*****************************************************************/
/* 1024-bit Skein */
/*****************************************************************/
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
/* init the context for a straight hashing operation */
int skein_1024_init(struct skein_1024_ctx *ctx, size_t hash_bit_len)
{
union {
u8 b[SKEIN_1024_STATE_BYTES];
u64 w[SKEIN_1024_STATE_WORDS];
} cfg; /* config block */
skein_assert_ret(hash_bit_len > 0, SKEIN_BAD_HASHLEN);
ctx->h.hash_bit_len = hash_bit_len; /* output hash bit count */
switch (hash_bit_len) { /* use pre-computed values, where available */
case 512:
memcpy(ctx->x, SKEIN_1024_IV_512, sizeof(ctx->x));
break;
case 384:
memcpy(ctx->x, SKEIN_1024_IV_384, sizeof(ctx->x));
break;
case 1024:
memcpy(ctx->x, SKEIN_1024_IV_1024, sizeof(ctx->x));
break;
default:
/* here if there is no precomputed IV value available */
/*
* build/process the config block, type == CONFIG
* (could be precomputed)
*/
/* set tweaks: T0=0; T1=CFG | FINAL */
skein_start_new_type(ctx, CFG_FINAL);
/* set the schema, version */
cfg.w[0] = skein_swap64(SKEIN_SCHEMA_VER);
/* hash result length in bits */
cfg.w[1] = skein_swap64(hash_bit_len);
cfg.w[2] = skein_swap64(SKEIN_CFG_TREE_INFO_SEQUENTIAL);
/* zero pad config block */
memset(&cfg.w[3], 0, sizeof(cfg) - 3 * sizeof(cfg.w[0]));
/* compute the initial chaining values from config block */
/* zero the chaining variables */
memset(ctx->x, 0, sizeof(ctx->x));
skein_1024_process_block(ctx, cfg.b, 1, SKEIN_CFG_STR_LEN);
break;
}
/* The chaining vars ctx->x are now initialized for the hash_bit_len. */
/* Set up to process the data message portion of the hash (default) */
skein_start_new_type(ctx, MSG); /* T0=0, T1= MSG type */
return SKEIN_SUCCESS;
}
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
/* init the context for a MAC and/or tree hash operation */
/*
* [identical to skein_1024_init() when key_bytes == 0 && \
* tree_info == SKEIN_CFG_TREE_INFO_SEQUENTIAL]
*/
int skein_1024_init_ext(struct skein_1024_ctx *ctx, size_t hash_bit_len,
u64 tree_info, const u8 *key, size_t key_bytes)
{
union {
u8 b[SKEIN_1024_STATE_BYTES];
u64 w[SKEIN_1024_STATE_WORDS];
} cfg; /* config block */
skein_assert_ret(hash_bit_len > 0, SKEIN_BAD_HASHLEN);
skein_assert_ret(key_bytes == 0 || key, SKEIN_FAIL);
/* compute the initial chaining values ctx->x[], based on key */
if (key_bytes == 0) { /* is there a key? */
/* no key: use all zeroes as key for config block */
memset(ctx->x, 0, sizeof(ctx->x));
} else { /* here to pre-process a key */
skein_assert(sizeof(cfg.b) >= sizeof(ctx->x));
/* do a mini-Init right here */
/* set output hash bit count = state size */
ctx->h.hash_bit_len = 8 * sizeof(ctx->x);
/* set tweaks: T0 = 0; T1 = KEY type */
skein_start_new_type(ctx, KEY);
/* zero the initial chaining variables */
memset(ctx->x, 0, sizeof(ctx->x));
/* hash the key */
skein_1024_update(ctx, key, key_bytes);
/* put result into cfg.b[] */
skein_1024_final_pad(ctx, cfg.b);
/* copy over into ctx->x[] */
memcpy(ctx->x, cfg.b, sizeof(cfg.b));
}
/*
* build/process the config block, type == CONFIG (could be
* precomputed for each key)
*/
/* output hash bit count */
ctx->h.hash_bit_len = hash_bit_len;
skein_start_new_type(ctx, CFG_FINAL);
/* pre-pad cfg.w[] with zeroes */
memset(&cfg.w, 0, sizeof(cfg.w));
cfg.w[0] = skein_swap64(SKEIN_SCHEMA_VER);
/* hash result length in bits */
cfg.w[1] = skein_swap64(hash_bit_len);
/* tree hash config info (or SKEIN_CFG_TREE_INFO_SEQUENTIAL) */
cfg.w[2] = skein_swap64(tree_info);
/* compute the initial chaining values from config block */
skein_1024_process_block(ctx, cfg.b, 1, SKEIN_CFG_STR_LEN);
/* The chaining vars ctx->x are now initialized */
/* Set up to process the data message portion of the hash (default) */
skein_start_new_type(ctx, MSG);
return SKEIN_SUCCESS;
}
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
/* process the input bytes */
int skein_1024_update(struct skein_1024_ctx *ctx, const u8 *msg,
size_t msg_byte_cnt)
{
size_t n;
/* catch uninitialized context */
skein_assert_ret(ctx->h.b_cnt <= SKEIN_1024_BLOCK_BYTES, SKEIN_FAIL);
/* process full blocks, if any */
if (msg_byte_cnt + ctx->h.b_cnt > SKEIN_1024_BLOCK_BYTES) {
/* finish up any buffered message data */
if (ctx->h.b_cnt) {
/* # bytes free in buffer b[] */
n = SKEIN_1024_BLOCK_BYTES - ctx->h.b_cnt;
if (n) {
/* check on our logic here */
skein_assert(n < msg_byte_cnt);
memcpy(&ctx->b[ctx->h.b_cnt], msg, n);
msg_byte_cnt -= n;
msg += n;
ctx->h.b_cnt += n;
}
skein_assert(ctx->h.b_cnt == SKEIN_1024_BLOCK_BYTES);
skein_1024_process_block(ctx, ctx->b, 1,
SKEIN_1024_BLOCK_BYTES);
ctx->h.b_cnt = 0;
}
/*
* now process any remaining full blocks, directly from input
* message data
*/
if (msg_byte_cnt > SKEIN_1024_BLOCK_BYTES) {
/* number of full blocks to process */
n = (msg_byte_cnt - 1) / SKEIN_1024_BLOCK_BYTES;
skein_1024_process_block(ctx, msg, n,
SKEIN_1024_BLOCK_BYTES);
msg_byte_cnt -= n * SKEIN_1024_BLOCK_BYTES;
msg += n * SKEIN_1024_BLOCK_BYTES;
}
skein_assert(ctx->h.b_cnt == 0);
}
/* copy any remaining source message data bytes into b[] */
if (msg_byte_cnt) {
skein_assert(msg_byte_cnt + ctx->h.b_cnt <=
SKEIN_1024_BLOCK_BYTES);
memcpy(&ctx->b[ctx->h.b_cnt], msg, msg_byte_cnt);
ctx->h.b_cnt += msg_byte_cnt;
}
return SKEIN_SUCCESS;
}
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
/* finalize the hash computation and output the result */
int skein_1024_final(struct skein_1024_ctx *ctx, u8 *hash_val)
{
size_t i, n, byte_cnt;
u64 x[SKEIN_1024_STATE_WORDS];
/* catch uninitialized context */
skein_assert_ret(ctx->h.b_cnt <= SKEIN_1024_BLOCK_BYTES, SKEIN_FAIL);
/* tag as the final block */
ctx->h.tweak[1] |= SKEIN_T1_FLAG_FINAL;
/* zero pad b[] if necessary */
if (ctx->h.b_cnt < SKEIN_1024_BLOCK_BYTES)
memset(&ctx->b[ctx->h.b_cnt], 0,
SKEIN_1024_BLOCK_BYTES - ctx->h.b_cnt);
/* process the final block */
skein_1024_process_block(ctx, ctx->b, 1, ctx->h.b_cnt);
/* now output the result */
/* total number of output bytes */
byte_cnt = (ctx->h.hash_bit_len + 7) >> 3;
/* run Threefish in "counter mode" to generate output */
/* zero out b[], so it can hold the counter */
memset(ctx->b, 0, sizeof(ctx->b));
/* keep a local copy of counter mode "key" */
memcpy(x, ctx->x, sizeof(x));
for (i = 0; i * SKEIN_1024_BLOCK_BYTES < byte_cnt; i++) {
/* build the counter block */
((u64 *)ctx->b)[0] = skein_swap64((u64)i);
skein_start_new_type(ctx, OUT_FINAL);
/* run "counter mode" */
skein_1024_process_block(ctx, ctx->b, 1, sizeof(u64));
/* number of output bytes left to go */
n = byte_cnt - i * SKEIN_1024_BLOCK_BYTES;
if (n >= SKEIN_1024_BLOCK_BYTES)
n = SKEIN_1024_BLOCK_BYTES;
/* "output" the ctr mode bytes */
skein_put64_lsb_first(hash_val + (i * SKEIN_1024_BLOCK_BYTES),
ctx->x, n);
/* restore the counter mode key for next time */
memcpy(ctx->x, x, sizeof(x));
}
return SKEIN_SUCCESS;
}
/**************** Functions to support MAC/tree hashing ***************/
/* (this code is identical for Optimized and Reference versions) */
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
/* finalize the hash computation and output the block, no OUTPUT stage */
int skein_256_final_pad(struct skein_256_ctx *ctx, u8 *hash_val)
{
/* catch uninitialized context */
skein_assert_ret(ctx->h.b_cnt <= SKEIN_256_BLOCK_BYTES, SKEIN_FAIL);
/* tag as the final block */
ctx->h.tweak[1] |= SKEIN_T1_FLAG_FINAL;
/* zero pad b[] if necessary */
if (ctx->h.b_cnt < SKEIN_256_BLOCK_BYTES)
memset(&ctx->b[ctx->h.b_cnt], 0,
SKEIN_256_BLOCK_BYTES - ctx->h.b_cnt);
/* process the final block */
skein_256_process_block(ctx, ctx->b, 1, ctx->h.b_cnt);
/* "output" the state bytes */
skein_put64_lsb_first(hash_val, ctx->x, SKEIN_256_BLOCK_BYTES);
return SKEIN_SUCCESS;
}
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
/* finalize the hash computation and output the block, no OUTPUT stage */
int skein_512_final_pad(struct skein_512_ctx *ctx, u8 *hash_val)
{
/* catch uninitialized context */
skein_assert_ret(ctx->h.b_cnt <= SKEIN_512_BLOCK_BYTES, SKEIN_FAIL);
/* tag as the final block */
ctx->h.tweak[1] |= SKEIN_T1_FLAG_FINAL;
/* zero pad b[] if necessary */
if (ctx->h.b_cnt < SKEIN_512_BLOCK_BYTES)
memset(&ctx->b[ctx->h.b_cnt], 0,
SKEIN_512_BLOCK_BYTES - ctx->h.b_cnt);
/* process the final block */
skein_512_process_block(ctx, ctx->b, 1, ctx->h.b_cnt);
/* "output" the state bytes */
skein_put64_lsb_first(hash_val, ctx->x, SKEIN_512_BLOCK_BYTES);
return SKEIN_SUCCESS;
}
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
/* finalize the hash computation and output the block, no OUTPUT stage */
int skein_1024_final_pad(struct skein_1024_ctx *ctx, u8 *hash_val)
{
/* catch uninitialized context */
skein_assert_ret(ctx->h.b_cnt <= SKEIN_1024_BLOCK_BYTES, SKEIN_FAIL);
/* tag as the final block */
ctx->h.tweak[1] |= SKEIN_T1_FLAG_FINAL;
/* zero pad b[] if necessary */
if (ctx->h.b_cnt < SKEIN_1024_BLOCK_BYTES)
memset(&ctx->b[ctx->h.b_cnt], 0,
SKEIN_1024_BLOCK_BYTES - ctx->h.b_cnt);
/* process the final block */
skein_1024_process_block(ctx, ctx->b, 1, ctx->h.b_cnt);
/* "output" the state bytes */
skein_put64_lsb_first(hash_val, ctx->x, SKEIN_1024_BLOCK_BYTES);
return SKEIN_SUCCESS;
}
#if SKEIN_TREE_HASH
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
/* just do the OUTPUT stage */
int skein_256_output(struct skein_256_ctx *ctx, u8 *hash_val)
{
size_t i, n, byte_cnt;
u64 x[SKEIN_256_STATE_WORDS];
/* catch uninitialized context */
skein_assert_ret(ctx->h.b_cnt <= SKEIN_256_BLOCK_BYTES, SKEIN_FAIL);
/* now output the result */
/* total number of output bytes */
byte_cnt = (ctx->h.hash_bit_len + 7) >> 3;
/* run Threefish in "counter mode" to generate output */
/* zero out b[], so it can hold the counter */
memset(ctx->b, 0, sizeof(ctx->b));
/* keep a local copy of counter mode "key" */
memcpy(x, ctx->x, sizeof(x));
for (i = 0; i * SKEIN_256_BLOCK_BYTES < byte_cnt; i++) {
/* build the counter block */
((u64 *)ctx->b)[0] = skein_swap64((u64)i);
skein_start_new_type(ctx, OUT_FINAL);
/* run "counter mode" */
skein_256_process_block(ctx, ctx->b, 1, sizeof(u64));
/* number of output bytes left to go */
n = byte_cnt - i * SKEIN_256_BLOCK_BYTES;
if (n >= SKEIN_256_BLOCK_BYTES)
n = SKEIN_256_BLOCK_BYTES;
/* "output" the ctr mode bytes */
skein_put64_lsb_first(hash_val + (i * SKEIN_256_BLOCK_BYTES),
ctx->x, n);
/* restore the counter mode key for next time */
memcpy(ctx->x, x, sizeof(x));
}
return SKEIN_SUCCESS;
}
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
/* just do the OUTPUT stage */
int skein_512_output(struct skein_512_ctx *ctx, u8 *hash_val)
{
size_t i, n, byte_cnt;
u64 x[SKEIN_512_STATE_WORDS];
/* catch uninitialized context */
skein_assert_ret(ctx->h.b_cnt <= SKEIN_512_BLOCK_BYTES, SKEIN_FAIL);
/* now output the result */
/* total number of output bytes */
byte_cnt = (ctx->h.hash_bit_len + 7) >> 3;
/* run Threefish in "counter mode" to generate output */
/* zero out b[], so it can hold the counter */
memset(ctx->b, 0, sizeof(ctx->b));
/* keep a local copy of counter mode "key" */
memcpy(x, ctx->x, sizeof(x));
for (i = 0; i * SKEIN_512_BLOCK_BYTES < byte_cnt; i++) {
/* build the counter block */
((u64 *)ctx->b)[0] = skein_swap64((u64)i);
skein_start_new_type(ctx, OUT_FINAL);
/* run "counter mode" */
skein_512_process_block(ctx, ctx->b, 1, sizeof(u64));
/* number of output bytes left to go */
n = byte_cnt - i * SKEIN_512_BLOCK_BYTES;
if (n >= SKEIN_512_BLOCK_BYTES)
n = SKEIN_512_BLOCK_BYTES;
/* "output" the ctr mode bytes */
skein_put64_lsb_first(hash_val + (i * SKEIN_512_BLOCK_BYTES),
ctx->x, n);
/* restore the counter mode key for next time */
memcpy(ctx->x, x, sizeof(x));
}
return SKEIN_SUCCESS;
}
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
/* just do the OUTPUT stage */
int skein_1024_output(struct skein_1024_ctx *ctx, u8 *hash_val)
{
size_t i, n, byte_cnt;
u64 x[SKEIN_1024_STATE_WORDS];
/* catch uninitialized context */
skein_assert_ret(ctx->h.b_cnt <= SKEIN_1024_BLOCK_BYTES, SKEIN_FAIL);
/* now output the result */
/* total number of output bytes */
byte_cnt = (ctx->h.hash_bit_len + 7) >> 3;
/* run Threefish in "counter mode" to generate output */
/* zero out b[], so it can hold the counter */
memset(ctx->b, 0, sizeof(ctx->b));
/* keep a local copy of counter mode "key" */
memcpy(x, ctx->x, sizeof(x));
for (i = 0; i * SKEIN_1024_BLOCK_BYTES < byte_cnt; i++) {
/* build the counter block */
((u64 *)ctx->b)[0] = skein_swap64((u64)i);
skein_start_new_type(ctx, OUT_FINAL);
/* run "counter mode" */
skein_1024_process_block(ctx, ctx->b, 1, sizeof(u64));
/* number of output bytes left to go */
n = byte_cnt - i * SKEIN_1024_BLOCK_BYTES;
if (n >= SKEIN_1024_BLOCK_BYTES)
n = SKEIN_1024_BLOCK_BYTES;
/* "output" the ctr mode bytes */
skein_put64_lsb_first(hash_val + (i * SKEIN_1024_BLOCK_BYTES),
ctx->x, n);
/* restore the counter mode key for next time */
memcpy(ctx->x, x, sizeof(x));
}
return SKEIN_SUCCESS;
}
#endif
drivers/staging/skein/skein_base.h deleted 100644 → 0
View file @ 7f5d8f71
#ifndef _SKEIN_H_
#define _SKEIN_H_ 1
/*
**************************************************************************
*
* Interface declarations and internal definitions for Skein hashing.
*
* Source code author: Doug Whiting, 2008.
*
* This algorithm and source code is released to the public domain.
*
**************************************************************************
*
* The following compile-time switches may be defined to control some
* tradeoffs between speed, code size, error checking, and security.
*
* The "default" note explains what happens when the switch is not defined.
*
* SKEIN_ERR_CHECK -- how error checking is handled inside Skein
* code. If not defined, most error checking
* is disabled (for performance). Otherwise,
* the switch value is interpreted as:
* 0: use assert() to flag errors
* 1: return SKEIN_FAIL to flag errors
*
**************************************************************************
*/
/*Skein digest sizes for crypto api*/
#define SKEIN256_DIGEST_BIT_SIZE 256
#define SKEIN512_DIGEST_BIT_SIZE 512
#define SKEIN1024_DIGEST_BIT_SIZE 1024
/* below two prototype assume we are handed aligned data */
#define skein_put64_lsb_first(dst08, src64, b_cnt) memcpy(dst08, src64, b_cnt)
#define skein_get64_lsb_first(dst64, src08, w_cnt) \
memcpy(dst64, src08, 8 * (w_cnt))
#define skein_swap64(w64) (w64)
enum {
SKEIN_SUCCESS = 0, /* return codes from Skein calls */
SKEIN_FAIL = 1,
SKEIN_BAD_HASHLEN = 2
};
#define SKEIN_MODIFIER_WORDS 2 /* number of modifier (tweak) words */
#define SKEIN_256_STATE_WORDS 4
#define SKEIN_512_STATE_WORDS 8
#define SKEIN_1024_STATE_WORDS 16
#define SKEIN_MAX_STATE_WORDS 16
#define SKEIN_256_STATE_BYTES (8 * SKEIN_256_STATE_WORDS)
#define SKEIN_512_STATE_BYTES (8 * SKEIN_512_STATE_WORDS)
#define SKEIN_1024_STATE_BYTES (8 * SKEIN_1024_STATE_WORDS)
#define SKEIN_256_STATE_BITS (64 * SKEIN_256_STATE_WORDS)
#define SKEIN_512_STATE_BITS (64 * SKEIN_512_STATE_WORDS)
#define SKEIN_1024_STATE_BITS (64 * SKEIN_1024_STATE_WORDS)
#define SKEIN_256_BLOCK_BYTES (8 * SKEIN_256_STATE_WORDS)
#define SKEIN_512_BLOCK_BYTES (8 * SKEIN_512_STATE_WORDS)
#define SKEIN_1024_BLOCK_BYTES (8 * SKEIN_1024_STATE_WORDS)
struct skein_ctx_hdr {
size_t hash_bit_len; /* size of hash result, in bits */
size_t b_cnt; /* current byte count in buffer b[] */
u64 tweak[SKEIN_MODIFIER_WORDS]; /* tweak[0]=byte cnt, tweak[1]=flags */
};
struct skein_256_ctx { /* 256-bit Skein hash context structure */
struct skein_ctx_hdr h; /* common header context variables */
u64 x[SKEIN_256_STATE_WORDS]; /* chaining variables */
u8 b[SKEIN_256_BLOCK_BYTES]; /* partial block buf (8-byte aligned) */
};
struct skein_512_ctx { /* 512-bit Skein hash context structure */
struct skein_ctx_hdr h; /* common header context variables */
u64 x[SKEIN_512_STATE_WORDS]; /* chaining variables */
u8 b[SKEIN_512_BLOCK_BYTES]; /* partial block buf (8-byte aligned) */
};
struct skein_1024_ctx { /* 1024-bit Skein hash context structure */
struct skein_ctx_hdr h; /* common header context variables */
u64 x[SKEIN_1024_STATE_WORDS]; /* chaining variables */
u8 b[SKEIN_1024_BLOCK_BYTES]; /* partial block buf (8-byte aligned) */
};
/* Skein APIs for (incremental) "straight hashing" */
int skein_256_init(struct skein_256_ctx *ctx, size_t hash_bit_len);
int skein_512_init(struct skein_512_ctx *ctx, size_t hash_bit_len);
int skein_1024_init(struct skein_1024_ctx *ctx, size_t hash_bit_len);
int skein_256_update(struct skein_256_ctx *ctx, const u8 *msg,
size_t msg_byte_cnt);
int skein_512_update(struct skein_512_ctx *ctx, const u8 *msg,
size_t msg_byte_cnt);
int skein_1024_update(struct skein_1024_ctx *ctx, const u8 *msg,
size_t msg_byte_cnt);
int skein_256_final(struct skein_256_ctx *ctx, u8 *hash_val);
int skein_512_final(struct skein_512_ctx *ctx, u8 *hash_val);
int skein_1024_final(struct skein_1024_ctx *ctx, u8 *hash_val);
/*
* Skein APIs for "extended" initialization: MAC keys, tree hashing.
* After an init_ext() call, just use update/final calls as with init().
*
* Notes: Same parameters as _init() calls, plus tree_info/key/key_bytes.
* When key_bytes == 0 and tree_info == SKEIN_SEQUENTIAL,
* the results of init_ext() are identical to calling init().
* The function init() may be called once to "precompute" the IV for
* a given hash_bit_len value, then by saving a copy of the context
* the IV computation may be avoided in later calls.
* Similarly, the function init_ext() may be called once per MAC key
* to precompute the MAC IV, then a copy of the context saved and
* reused for each new MAC computation.
*/
int skein_256_init_ext(struct skein_256_ctx *ctx, size_t hash_bit_len,
u64 tree_info, const u8 *key, size_t key_bytes);
int skein_512_init_ext(struct skein_512_ctx *ctx, size_t hash_bit_len,
u64 tree_info, const u8 *key, size_t key_bytes);
int skein_1024_init_ext(struct skein_1024_ctx *ctx, size_t hash_bit_len,
u64 tree_info, const u8 *key, size_t key_bytes);
/*
* Skein APIs for MAC and tree hash:
* final_pad: pad, do final block, but no OUTPUT type
* output: do just the output stage
*/
int skein_256_final_pad(struct skein_256_ctx *ctx, u8 *hash_val);
int skein_512_final_pad(struct skein_512_ctx *ctx, u8 *hash_val);
int skein_1024_final_pad(struct skein_1024_ctx *ctx, u8 *hash_val);
#ifndef SKEIN_TREE_HASH
#define SKEIN_TREE_HASH (1)
#endif
#if SKEIN_TREE_HASH
int skein_256_output(struct skein_256_ctx *ctx, u8 *hash_val);
int skein_512_output(struct skein_512_ctx *ctx, u8 *hash_val);
int skein_1024_output(struct skein_1024_ctx *ctx, u8 *hash_val);
#endif
/*
*****************************************************************
* "Internal" Skein definitions
* -- not needed for sequential hashing API, but will be
* helpful for other uses of Skein (e.g., tree hash mode).
* -- included here so that they can be shared between
* reference and optimized code.
*****************************************************************
*/
/* tweak word tweak[1]: bit field starting positions */
#define SKEIN_T1_BIT(BIT) ((BIT) - 64) /* second word */
#define SKEIN_T1_POS_TREE_LVL SKEIN_T1_BIT(112) /* 112..118 hash tree level */
#define SKEIN_T1_POS_BIT_PAD SKEIN_T1_BIT(119) /* 119 part. final in byte */
#define SKEIN_T1_POS_BLK_TYPE SKEIN_T1_BIT(120) /* 120..125 type field `*/
#define SKEIN_T1_POS_FIRST SKEIN_T1_BIT(126) /* 126 first blk flag */
#define SKEIN_T1_POS_FINAL SKEIN_T1_BIT(127) /* 127 final blk flag */
/* tweak word tweak[1]: flag bit definition(s) */
#define SKEIN_T1_FLAG_FIRST (((u64)1) << SKEIN_T1_POS_FIRST)
#define SKEIN_T1_FLAG_FINAL (((u64)1) << SKEIN_T1_POS_FINAL)
#define SKEIN_T1_FLAG_BIT_PAD (((u64)1) << SKEIN_T1_POS_BIT_PAD)
/* tweak word tweak[1]: tree level bit field mask */
#define SKEIN_T1_TREE_LVL_MASK (((u64)0x7F) << SKEIN_T1_POS_TREE_LVL)
#define SKEIN_T1_TREE_LEVEL(n) (((u64)(n)) << SKEIN_T1_POS_TREE_LVL)
/* tweak word tweak[1]: block type field */
#define SKEIN_BLK_TYPE_KEY (0) /* key, for MAC and KDF */
#define SKEIN_BLK_TYPE_CFG (4) /* configuration block */
#define SKEIN_BLK_TYPE_PERS (8) /* personalization string */
#define SKEIN_BLK_TYPE_PK (12) /* pubkey (for digital sigs) */
#define SKEIN_BLK_TYPE_KDF (16) /* key identifier for KDF */
#define SKEIN_BLK_TYPE_NONCE (20) /* nonce for PRNG */
#define SKEIN_BLK_TYPE_MSG (48) /* message processing */
#define SKEIN_BLK_TYPE_OUT (63) /* output stage */
#define SKEIN_BLK_TYPE_MASK (63) /* bit field mask */
#define SKEIN_T1_BLK_TYPE(T) (((u64)(SKEIN_BLK_TYPE_##T)) << \
SKEIN_T1_POS_BLK_TYPE)
#define SKEIN_T1_BLK_TYPE_KEY SKEIN_T1_BLK_TYPE(KEY) /* for MAC and KDF */
#define SKEIN_T1_BLK_TYPE_CFG SKEIN_T1_BLK_TYPE(CFG) /* config block */
#define SKEIN_T1_BLK_TYPE_PERS SKEIN_T1_BLK_TYPE(PERS) /* personalization */
#define SKEIN_T1_BLK_TYPE_PK SKEIN_T1_BLK_TYPE(PK) /* pubkey (for sigs) */
#define SKEIN_T1_BLK_TYPE_KDF SKEIN_T1_BLK_TYPE(KDF) /* key ident for KDF */
#define SKEIN_T1_BLK_TYPE_NONCE SKEIN_T1_BLK_TYPE(NONCE)/* nonce for PRNG */
#define SKEIN_T1_BLK_TYPE_MSG SKEIN_T1_BLK_TYPE(MSG) /* message processing */
#define SKEIN_T1_BLK_TYPE_OUT SKEIN_T1_BLK_TYPE(OUT) /* output stage */
#define SKEIN_T1_BLK_TYPE_MASK SKEIN_T1_BLK_TYPE(MASK) /* field bit mask */
#define SKEIN_T1_BLK_TYPE_CFG_FINAL (SKEIN_T1_BLK_TYPE_CFG | \
SKEIN_T1_FLAG_FINAL)
#define SKEIN_T1_BLK_TYPE_OUT_FINAL (SKEIN_T1_BLK_TYPE_OUT | \
SKEIN_T1_FLAG_FINAL)
#define SKEIN_VERSION (1)
#ifndef SKEIN_ID_STRING_LE /* allow compile-time personalization */
#define SKEIN_ID_STRING_LE (0x33414853) /* "SHA3" (little-endian)*/
#endif
#define SKEIN_MK_64(hi32, lo32) ((lo32) + (((u64)(hi32)) << 32))
#define SKEIN_SCHEMA_VER SKEIN_MK_64(SKEIN_VERSION, SKEIN_ID_STRING_LE)
#define SKEIN_KS_PARITY SKEIN_MK_64(0x1BD11BDA, 0xA9FC1A22)
#define SKEIN_CFG_STR_LEN (4 * 8)
/* bit field definitions in config block tree_info word */
#define SKEIN_CFG_TREE_LEAF_SIZE_POS (0)
#define SKEIN_CFG_TREE_NODE_SIZE_POS (8)
#define SKEIN_CFG_TREE_MAX_LEVEL_POS (16)
#define SKEIN_CFG_TREE_LEAF_SIZE_MSK (((u64)0xFF) << \
SKEIN_CFG_TREE_LEAF_SIZE_POS)
#define SKEIN_CFG_TREE_NODE_SIZE_MSK (((u64)0xFF) << \
SKEIN_CFG_TREE_NODE_SIZE_POS)
#define SKEIN_CFG_TREE_MAX_LEVEL_MSK (((u64)0xFF) << \
SKEIN_CFG_TREE_MAX_LEVEL_POS)
#define SKEIN_CFG_TREE_INFO(leaf, node, max_lvl) \
((((u64)(leaf)) << SKEIN_CFG_TREE_LEAF_SIZE_POS) | \
(((u64)(node)) << SKEIN_CFG_TREE_NODE_SIZE_POS) | \
(((u64)(max_lvl)) << SKEIN_CFG_TREE_MAX_LEVEL_POS))
/* use as tree_info in InitExt() call for sequential processing */
#define SKEIN_CFG_TREE_INFO_SEQUENTIAL SKEIN_CFG_TREE_INFO(0, 0, 0)
/*
* Skein macros for getting/setting tweak words, etc.
* These are useful for partial input bytes, hash tree init/update, etc.
*/
#define skein_get_tweak(ctx_ptr, TWK_NUM) ((ctx_ptr)->h.tweak[TWK_NUM])
#define skein_set_tweak(ctx_ptr, TWK_NUM, t_val) { \
(ctx_ptr)->h.tweak[TWK_NUM] = (t_val); \
}
#define skein_get_T0(ctx_ptr) skein_get_tweak(ctx_ptr, 0)
#define skein_get_T1(ctx_ptr) skein_get_tweak(ctx_ptr, 1)
#define skein_set_T0(ctx_ptr, T0) skein_set_tweak(ctx_ptr, 0, T0)
#define skein_set_T1(ctx_ptr, T1) skein_set_tweak(ctx_ptr, 1, T1)
/* set both tweak words at once */
#define skein_set_T0_T1(ctx_ptr, T0, T1) \
{ \
skein_set_T0(ctx_ptr, (T0)); \
skein_set_T1(ctx_ptr, (T1)); \
}
#define skein_set_type(ctx_ptr, BLK_TYPE) \
skein_set_T1(ctx_ptr, SKEIN_T1_BLK_TYPE_##BLK_TYPE)
/*
* setup for starting with a new type:
* h.tweak[0]=0; h.tweak[1] = NEW_TYPE; h.b_cnt=0;
*/
#define skein_start_new_type(ctx_ptr, BLK_TYPE) { \
skein_set_T0_T1(ctx_ptr, 0, SKEIN_T1_FLAG_FIRST | \
SKEIN_T1_BLK_TYPE_##BLK_TYPE); \
(ctx_ptr)->h.b_cnt = 0; \
}
#define skein_clear_first_flag(hdr) { \
(hdr).tweak[1] &= ~SKEIN_T1_FLAG_FIRST; \
}
#define skein_set_bit_pad_flag(hdr) { \
(hdr).tweak[1] |= SKEIN_T1_FLAG_BIT_PAD; \
}
#define skein_set_tree_level(hdr, height) { \
(hdr).tweak[1] |= SKEIN_T1_TREE_LEVEL(height); \
}
/* ignore all asserts, for performance */
#define skein_assert_ret(x, ret_code)
#define skein_assert(x)
/*
*****************************************************************
* Skein block function constants (shared across Ref and Opt code)
*****************************************************************
*/
enum {
/* SKEIN_256 round rotation constants */
R_256_0_0 = 14, R_256_0_1 = 16,
R_256_1_0 = 52, R_256_1_1 = 57,
R_256_2_0 = 23, R_256_2_1 = 40,
R_256_3_0 = 5, R_256_3_1 = 37,
R_256_4_0 = 25, R_256_4_1 = 33,
R_256_5_0 = 46, R_256_5_1 = 12,
R_256_6_0 = 58, R_256_6_1 = 22,
R_256_7_0 = 32, R_256_7_1 = 32,
/* SKEIN_512 round rotation constants */
R_512_0_0 = 46, R_512_0_1 = 36, R_512_0_2 = 19, R_512_0_3 = 37,
R_512_1_0 = 33, R_512_1_1 = 27, R_512_1_2 = 14, R_512_1_3 = 42,
R_512_2_0 = 17, R_512_2_1 = 49, R_512_2_2 = 36, R_512_2_3 = 39,
R_512_3_0 = 44, R_512_3_1 = 9, R_512_3_2 = 54, R_512_3_3 = 56,
R_512_4_0 = 39, R_512_4_1 = 30, R_512_4_2 = 34, R_512_4_3 = 24,
R_512_5_0 = 13, R_512_5_1 = 50, R_512_5_2 = 10, R_512_5_3 = 17,
R_512_6_0 = 25, R_512_6_1 = 29, R_512_6_2 = 39, R_512_6_3 = 43,
R_512_7_0 = 8, R_512_7_1 = 35, R_512_7_2 = 56, R_512_7_3 = 22,
/* SKEIN_1024 round rotation constants */
R1024_0_0 = 24, R1024_0_1 = 13, R1024_0_2 = 8, R1024_0_3 = 47,
R1024_0_4 = 8, R1024_0_5 = 17, R1024_0_6 = 22, R1024_0_7 = 37,
R1024_1_0 = 38, R1024_1_1 = 19, R1024_1_2 = 10, R1024_1_3 = 55,
R1024_1_4 = 49, R1024_1_5 = 18, R1024_1_6 = 23, R1024_1_7 = 52,
R1024_2_0 = 33, R1024_2_1 = 4, R1024_2_2 = 51, R1024_2_3 = 13,
R1024_2_4 = 34, R1024_2_5 = 41, R1024_2_6 = 59, R1024_2_7 = 17,
R1024_3_0 = 5, R1024_3_1 = 20, R1024_3_2 = 48, R1024_3_3 = 41,
R1024_3_4 = 47, R1024_3_5 = 28, R1024_3_6 = 16, R1024_3_7 = 25,
R1024_4_0 = 41, R1024_4_1 = 9, R1024_4_2 = 37, R1024_4_3 = 31,
R1024_4_4 = 12, R1024_4_5 = 47, R1024_4_6 = 44, R1024_4_7 = 30,
R1024_5_0 = 16, R1024_5_1 = 34, R1024_5_2 = 56, R1024_5_3 = 51,
R1024_5_4 = 4, R1024_5_5 = 53, R1024_5_6 = 42, R1024_5_7 = 41,
R1024_6_0 = 31, R1024_6_1 = 44, R1024_6_2 = 47, R1024_6_3 = 46,
R1024_6_4 = 19, R1024_6_5 = 42, R1024_6_6 = 44, R1024_6_7 = 25,
R1024_7_0 = 9, R1024_7_1 = 48, R1024_7_2 = 35, R1024_7_3 = 52,
R1024_7_4 = 23, R1024_7_5 = 31, R1024_7_6 = 37, R1024_7_7 = 20
};
#ifndef SKEIN_ROUNDS
#define SKEIN_256_ROUNDS_TOTAL (72) /* # rounds for diff block sizes */
#define SKEIN_512_ROUNDS_TOTAL (72)
#define SKEIN_1024_ROUNDS_TOTAL (80)
#else /* allow command-line define in range 8*(5..14) */
#define SKEIN_256_ROUNDS_TOTAL (8 * ((((SKEIN_ROUNDS / 100) + 5) % 10) + 5))
#define SKEIN_512_ROUNDS_TOTAL (8 * ((((SKEIN_ROUNDS / 10) + 5) % 10) + 5))
#define SKEIN_1024_ROUNDS_TOTAL (8 * ((((SKEIN_ROUNDS) + 5) % 10) + 5))
#endif
#endif /* ifndef _SKEIN_H_ */
drivers/staging/skein/skein_block.c deleted 100644 → 0
View file @ 7f5d8f71
/*
***********************************************************************
*
* Implementation of the Skein block functions.
*
* Source code author: Doug Whiting, 2008.
*
* This algorithm and source code is released to the public domain.
*
* Compile-time switches:
*
* SKEIN_USE_ASM -- set bits (256/512/1024) to select which
* versions use ASM code for block processing
* [default: use C for all block sizes]
*
***********************************************************************
*/
#include <linux/string.h>
#include <linux/bitops.h>
#include "skein_base.h"
#include "skein_block.h"
/***************************** SKEIN_256 ******************************/
#if !(SKEIN_USE_ASM & 256)
void skein_256_process_block(struct skein_256_ctx *ctx, const u8 *blk_ptr,
size_t blk_cnt, size_t byte_cnt_add)
{ /* do it in C */
enum {
WCNT = SKEIN_256_STATE_WORDS
};
size_t r;
#if SKEIN_UNROLL_256
/* key schedule: chaining vars + tweak + "rot"*/
u64 kw[WCNT + 4 + (RCNT * 2)];
#else
/* key schedule words : chaining vars + tweak */
u64 kw[WCNT + 4];
#endif
u64 X0, X1, X2, X3; /* local copy of context vars, for speed */
u64 w[WCNT]; /* local copy of input block */
#ifdef SKEIN_DEBUG
const u64 *X_ptr[4]; /* use for debugging (help cc put Xn in regs) */
X_ptr[0] = &X0;
X_ptr[1] = &X1;
X_ptr[2] = &X2;
X_ptr[3] = &X3;
#endif
skein_assert(blk_cnt != 0); /* never call with blk_cnt == 0! */
ts[0] = ctx->h.tweak[0];
ts[1] = ctx->h.tweak[1];
do {
/*
* this implementation only supports 2**64 input bytes
* (no carry out here)
*/
ts[0] += byte_cnt_add; /* update processed length */
/* precompute the key schedule for this block */
ks[0] = ctx->x[0];
ks[1] = ctx->x[1];
ks[2] = ctx->x[2];
ks[3] = ctx->x[3];
ks[4] = ks[0] ^ ks[1] ^ ks[2] ^ ks[3] ^ SKEIN_KS_PARITY;
ts[2] = ts[0] ^ ts[1];
/* get input block in little-endian format */
skein_get64_lsb_first(w, blk_ptr, WCNT);
debug_save_tweak(ctx);
/* do the first full key injection */
X0 = w[0] + ks[0];
X1 = w[1] + ks[1] + ts[0];
X2 = w[2] + ks[2] + ts[1];
X3 = w[3] + ks[3];
blk_ptr += SKEIN_256_BLOCK_BYTES;
/* run the rounds */
for (r = 1;
r < (SKEIN_UNROLL_256 ? 2 * RCNT : 2);
r += (SKEIN_UNROLL_256 ? 2 * SKEIN_UNROLL_256 : 1)) {
R256_8_ROUNDS(0);
#if R256_UNROLL_R(1)
R256_8_ROUNDS(1);
#endif
#if R256_UNROLL_R(2)
R256_8_ROUNDS(2);
#endif
#if R256_UNROLL_R(3)
R256_8_ROUNDS(3);
#endif
#if R256_UNROLL_R(4)
R256_8_ROUNDS(4);
#endif
#if R256_UNROLL_R(5)
R256_8_ROUNDS(5);
#endif
#if R256_UNROLL_R(6)
R256_8_ROUNDS(6);
#endif
#if R256_UNROLL_R(7)
R256_8_ROUNDS(7);
#endif
#if R256_UNROLL_R(8)
R256_8_ROUNDS(8);
#endif
#if R256_UNROLL_R(9)
R256_8_ROUNDS(9);
#endif
#if R256_UNROLL_R(10)
R256_8_ROUNDS(10);
#endif
#if R256_UNROLL_R(11)
R256_8_ROUNDS(11);
#endif
#if R256_UNROLL_R(12)
R256_8_ROUNDS(12);
#endif
#if R256_UNROLL_R(13)
R256_8_ROUNDS(13);
#endif
#if R256_UNROLL_R(14)
R256_8_ROUNDS(14);
#endif
}
/* do the final "feedforward" xor, update context chaining */
ctx->x[0] = X0 ^ w[0];
ctx->x[1] = X1 ^ w[1];
ctx->x[2] = X2 ^ w[2];
ctx->x[3] = X3 ^ w[3];
ts[1] &= ~SKEIN_T1_FLAG_FIRST;
} while (--blk_cnt);
ctx->h.tweak[0] = ts[0];
ctx->h.tweak[1] = ts[1];
}
#if defined(SKEIN_CODE_SIZE) || defined(SKEIN_PERF)
size_t skein_256_process_block_code_size(void)
{
return ((u8 *)skein_256_process_block_code_size) -
((u8 *)skein_256_process_block);
}
unsigned int skein_256_unroll_cnt(void)
{
return SKEIN_UNROLL_256;
}
#endif
#endif
/***************************** SKEIN_512 ******************************/
#if !(SKEIN_USE_ASM & 512)
void skein_512_process_block(struct skein_512_ctx *ctx, const u8 *blk_ptr,
size_t blk_cnt, size_t byte_cnt_add)
{ /* do it in C */
enum {
WCNT = SKEIN_512_STATE_WORDS
};
size_t r;
#if SKEIN_UNROLL_512
/* key sched: chaining vars + tweak + "rot"*/
u64 kw[WCNT + 4 + RCNT * 2];
#else
/* key schedule words : chaining vars + tweak */
u64 kw[WCNT + 4];
#endif
u64 X0, X1, X2, X3, X4, X5, X6, X7; /* local copies, for speed */
u64 w[WCNT]; /* local copy of input block */
#ifdef SKEIN_DEBUG
const u64 *X_ptr[8]; /* use for debugging (help cc put Xn in regs) */
X_ptr[0] = &X0;
X_ptr[1] = &X1;
X_ptr[2] = &X2;
X_ptr[3] = &X3;
X_ptr[4] = &X4;
X_ptr[5] = &X5;
X_ptr[6] = &X6;
X_ptr[7] = &X7;
#endif
skein_assert(blk_cnt != 0); /* never call with blk_cnt == 0! */
ts[0] = ctx->h.tweak[0];
ts[1] = ctx->h.tweak[1];
do {
/*
* this implementation only supports 2**64 input bytes
* (no carry out here)
*/
ts[0] += byte_cnt_add; /* update processed length */
/* precompute the key schedule for this block */
ks[0] = ctx->x[0];
ks[1] = ctx->x[1];
ks[2] = ctx->x[2];
ks[3] = ctx->x[3];
ks[4] = ctx->x[4];
ks[5] = ctx->x[5];
ks[6] = ctx->x[6];
ks[7] = ctx->x[7];
ks[8] = ks[0] ^ ks[1] ^ ks[2] ^ ks[3] ^
ks[4] ^ ks[5] ^ ks[6] ^ ks[7] ^ SKEIN_KS_PARITY;
ts[2] = ts[0] ^ ts[1];
/* get input block in little-endian format */
skein_get64_lsb_first(w, blk_ptr, WCNT);
debug_save_tweak(ctx);
/* do the first full key injection */
X0 = w[0] + ks[0];
X1 = w[1] + ks[1];
X2 = w[2] + ks[2];
X3 = w[3] + ks[3];
X4 = w[4] + ks[4];
X5 = w[5] + ks[5] + ts[0];
X6 = w[6] + ks[6] + ts[1];
X7 = w[7] + ks[7];
blk_ptr += SKEIN_512_BLOCK_BYTES;
/* run the rounds */
for (r = 1;
r < (SKEIN_UNROLL_512 ? 2 * RCNT : 2);
r += (SKEIN_UNROLL_512 ? 2 * SKEIN_UNROLL_512 : 1)) {
R512_8_ROUNDS(0);
#if R512_UNROLL_R(1)
R512_8_ROUNDS(1);
#endif
#if R512_UNROLL_R(2)
R512_8_ROUNDS(2);
#endif
#if R512_UNROLL_R(3)
R512_8_ROUNDS(3);
#endif
#if R512_UNROLL_R(4)
R512_8_ROUNDS(4);
#endif
#if R512_UNROLL_R(5)
R512_8_ROUNDS(5);
#endif
#if R512_UNROLL_R(6)
R512_8_ROUNDS(6);
#endif
#if R512_UNROLL_R(7)
R512_8_ROUNDS(7);
#endif
#if R512_UNROLL_R(8)
R512_8_ROUNDS(8);
#endif
#if R512_UNROLL_R(9)
R512_8_ROUNDS(9);
#endif
#if R512_UNROLL_R(10)
R512_8_ROUNDS(10);
#endif
#if R512_UNROLL_R(11)
R512_8_ROUNDS(11);
#endif
#if R512_UNROLL_R(12)
R512_8_ROUNDS(12);
#endif
#if R512_UNROLL_R(13)
R512_8_ROUNDS(13);
#endif
#if R512_UNROLL_R(14)
R512_8_ROUNDS(14);
#endif
}
/* do the final "feedforward" xor, update context chaining */
ctx->x[0] = X0 ^ w[0];
ctx->x[1] = X1 ^ w[1];
ctx->x[2] = X2 ^ w[2];
ctx->x[3] = X3 ^ w[3];
ctx->x[4] = X4 ^ w[4];
ctx->x[5] = X5 ^ w[5];
ctx->x[6] = X6 ^ w[6];
ctx->x[7] = X7 ^ w[7];
ts[1] &= ~SKEIN_T1_FLAG_FIRST;
} while (--blk_cnt);
ctx->h.tweak[0] = ts[0];
ctx->h.tweak[1] = ts[1];
}
#if defined(SKEIN_CODE_SIZE) || defined(SKEIN_PERF)
size_t skein_512_process_block_code_size(void)
{
return ((u8 *)skein_512_process_block_code_size) -
((u8 *)skein_512_process_block);
}
unsigned int skein_512_unroll_cnt(void)
{
return SKEIN_UNROLL_512;
}
#endif
#endif
/***************************** SKEIN_1024 ******************************/
#if !(SKEIN_USE_ASM & 1024)
void skein_1024_process_block(struct skein_1024_ctx *ctx, const u8 *blk_ptr,
size_t blk_cnt, size_t byte_cnt_add)
{ /* do it in C, always looping (unrolled is bigger AND slower!) */
enum {
WCNT = SKEIN_1024_STATE_WORDS
};
size_t r;
#if (SKEIN_UNROLL_1024 != 0)
/* key sched: chaining vars + tweak + "rot" */
u64 kw[WCNT + 4 + (RCNT * 2)];
#else
/* key schedule words : chaining vars + tweak */
u64 kw[WCNT + 4];
#endif
/* local copy of vars, for speed */
u64 X00, X01, X02, X03, X04, X05, X06, X07,
X08, X09, X10, X11, X12, X13, X14, X15;
u64 w[WCNT]; /* local copy of input block */
skein_assert(blk_cnt != 0); /* never call with blk_cnt == 0! */
ts[0] = ctx->h.tweak[0];
ts[1] = ctx->h.tweak[1];
do {
/*
* this implementation only supports 2**64 input bytes
* (no carry out here)
*/
ts[0] += byte_cnt_add; /* update processed length */
/* precompute the key schedule for this block */
ks[0] = ctx->x[0];
ks[1] = ctx->x[1];
ks[2] = ctx->x[2];
ks[3] = ctx->x[3];
ks[4] = ctx->x[4];
ks[5] = ctx->x[5];
ks[6] = ctx->x[6];
ks[7] = ctx->x[7];
ks[8] = ctx->x[8];
ks[9] = ctx->x[9];
ks[10] = ctx->x[10];
ks[11] = ctx->x[11];
ks[12] = ctx->x[12];
ks[13] = ctx->x[13];
ks[14] = ctx->x[14];
ks[15] = ctx->x[15];
ks[16] = ks[0] ^ ks[1] ^ ks[2] ^ ks[3] ^
ks[4] ^ ks[5] ^ ks[6] ^ ks[7] ^
ks[8] ^ ks[9] ^ ks[10] ^ ks[11] ^
ks[12] ^ ks[13] ^ ks[14] ^ ks[15] ^ SKEIN_KS_PARITY;
ts[2] = ts[0] ^ ts[1];
/* get input block in little-endian format */
skein_get64_lsb_first(w, blk_ptr, WCNT);
debug_save_tweak(ctx);
/* do the first full key injection */
X00 = w[0] + ks[0];
X01 = w[1] + ks[1];
X02 = w[2] + ks[2];
X03 = w[3] + ks[3];
X04 = w[4] + ks[4];
X05 = w[5] + ks[5];
X06 = w[6] + ks[6];
X07 = w[7] + ks[7];
X08 = w[8] + ks[8];
X09 = w[9] + ks[9];
X10 = w[10] + ks[10];
X11 = w[11] + ks[11];
X12 = w[12] + ks[12];
X13 = w[13] + ks[13] + ts[0];
X14 = w[14] + ks[14] + ts[1];
X15 = w[15] + ks[15];
for (r = 1;
r < (SKEIN_UNROLL_1024 ? 2 * RCNT : 2);
r += (SKEIN_UNROLL_1024 ? 2 * SKEIN_UNROLL_1024 : 1)) {
R1024_8_ROUNDS(0);
#if R1024_UNROLL_R(1)
R1024_8_ROUNDS(1);
#endif
#if R1024_UNROLL_R(2)
R1024_8_ROUNDS(2);
#endif
#if R1024_UNROLL_R(3)
R1024_8_ROUNDS(3);
#endif
#if R1024_UNROLL_R(4)
R1024_8_ROUNDS(4);
#endif
#if R1024_UNROLL_R(5)
R1024_8_ROUNDS(5);
#endif
#if R1024_UNROLL_R(6)
R1024_8_ROUNDS(6);
#endif
#if R1024_UNROLL_R(7)
R1024_8_ROUNDS(7);
#endif
#if R1024_UNROLL_R(8)
R1024_8_ROUNDS(8);
#endif
#if R1024_UNROLL_R(9)
R1024_8_ROUNDS(9);
#endif
#if R1024_UNROLL_R(10)
R1024_8_ROUNDS(10);
#endif
#if R1024_UNROLL_R(11)
R1024_8_ROUNDS(11);
#endif
#if R1024_UNROLL_R(12)
R1024_8_ROUNDS(12);
#endif
#if R1024_UNROLL_R(13)
R1024_8_ROUNDS(13);
#endif
#if R1024_UNROLL_R(14)
R1024_8_ROUNDS(14);
#endif
}
/* do the final "feedforward" xor, update context chaining */
ctx->x[0] = X00 ^ w[0];
ctx->x[1] = X01 ^ w[1];
ctx->x[2] = X02 ^ w[2];
ctx->x[3] = X03 ^ w[3];
ctx->x[4] = X04 ^ w[4];
ctx->x[5] = X05 ^ w[5];
ctx->x[6] = X06 ^ w[6];
ctx->x[7] = X07 ^ w[7];
ctx->x[8] = X08 ^ w[8];
ctx->x[9] = X09 ^ w[9];
ctx->x[10] = X10 ^ w[10];
ctx->x[11] = X11 ^ w[11];
ctx->x[12] = X12 ^ w[12];
ctx->x[13] = X13 ^ w[13];
ctx->x[14] = X14 ^ w[14];
ctx->x[15] = X15 ^ w[15];
ts[1] &= ~SKEIN_T1_FLAG_FIRST;
blk_ptr += SKEIN_1024_BLOCK_BYTES;
} while (--blk_cnt);
ctx->h.tweak[0] = ts[0];
ctx->h.tweak[1] = ts[1];
}
#if defined(SKEIN_CODE_SIZE) || defined(SKEIN_PERF)
size_t skein_1024_process_block_code_size(void)
{
return ((u8 *)skein_1024_process_block_code_size) -
((u8 *)skein_1024_process_block);
}
unsigned int skein_1024_unroll_cnt(void)
{
return SKEIN_UNROLL_1024;
}
#endif
#endif
drivers/staging/skein/skein_block.h deleted 100644 → 0
View file @ 7f5d8f71
/*
***********************************************************************
*
* Implementation of the Skein hash function.
*
* Source code author: Doug Whiting, 2008.
*
* This algorithm and source code is released to the public domain.
*
***********************************************************************
*/
#ifndef _SKEIN_BLOCK_H_
#define _SKEIN_BLOCK_H_
#include "skein_base.h" /* get the Skein API definitions */
#ifndef SKEIN_USE_ASM
#define SKEIN_USE_ASM (0) /* default is all C code (no ASM) */
#endif
#ifndef SKEIN_LOOP
#define SKEIN_LOOP 001 /* default: unroll 256 and 512, but not 1024 */
#endif
#define BLK_BITS (WCNT * 64) /* some useful definitions for code here */
#define KW_TWK_BASE (0)
#define KW_KEY_BASE (3)
#define ks (kw + KW_KEY_BASE)
#define ts (kw + KW_TWK_BASE)
#ifdef SKEIN_DEBUG
#define debug_save_tweak(ctx) \
{ \
ctx->h.tweak[0] = ts[0]; \
ctx->h.tweak[1] = ts[1]; \
}
#else
#define debug_save_tweak(ctx)
#endif
#if !(SKEIN_USE_ASM & 256)
#undef RCNT
#define RCNT (SKEIN_256_ROUNDS_TOTAL / 8)
#ifdef SKEIN_LOOP /* configure how much to unroll the loop */
#define SKEIN_UNROLL_256 (((SKEIN_LOOP) / 100) % 10)
#else
#define SKEIN_UNROLL_256 (0)
#endif
#if SKEIN_UNROLL_256
#if (RCNT % SKEIN_UNROLL_256)
#error "Invalid SKEIN_UNROLL_256" /* sanity check on unroll count */
#endif
#endif
#define ROUND256(p0, p1, p2, p3, ROT, r_num) \
do { \
X##p0 += X##p1; \
X##p1 = rol64(X##p1, ROT##_0); \
X##p1 ^= X##p0; \
X##p2 += X##p3; \
X##p3 = rol64(X##p3, ROT##_1); \
X##p3 ^= X##p2; \
} while (0)
#if SKEIN_UNROLL_256 == 0
#define R256(p0, p1, p2, p3, ROT, r_num) /* fully unrolled */ \
ROUND256(p0, p1, p2, p3, ROT, r_num)
#define I256(R) \
do { \
/* inject the key schedule value */ \
X0 += ks[((R) + 1) % 5]; \
X1 += ks[((R) + 2) % 5] + ts[((R) + 1) % 3]; \
X2 += ks[((R) + 3) % 5] + ts[((R) + 2) % 3]; \
X3 += ks[((R) + 4) % 5] + (R) + 1; \
} while (0)
#else
/* looping version */
#define R256(p0, p1, p2, p3, ROT, r_num) ROUND256(p0, p1, p2, p3, ROT, r_num)
#define I256(R) \
do { \
/* inject the key schedule value */ \
X0 += ks[r + (R) + 0]; \
X1 += ks[r + (R) + 1] + ts[r + (R) + 0];\
X2 += ks[r + (R) + 2] + ts[r + (R) + 1];\
X3 += ks[r + (R) + 3] + r + (R); \
/* rotate key schedule */ \
ks[r + (R) + 4] = ks[r + (R) - 1]; \
ts[r + (R) + 2] = ts[r + (R) - 1]; \
} while (0)
#endif
#define R256_8_ROUNDS(R) \
do { \
R256(0, 1, 2, 3, R_256_0, 8 * (R) + 1); \
R256(0, 3, 2, 1, R_256_1, 8 * (R) + 2); \
R256(0, 1, 2, 3, R_256_2, 8 * (R) + 3); \
R256(0, 3, 2, 1, R_256_3, 8 * (R) + 4); \
I256(2 * (R)); \
R256(0, 1, 2, 3, R_256_4, 8 * (R) + 5); \
R256(0, 3, 2, 1, R_256_5, 8 * (R) + 6); \
R256(0, 1, 2, 3, R_256_6, 8 * (R) + 7); \
R256(0, 3, 2, 1, R_256_7, 8 * (R) + 8); \
I256(2 * (R) + 1); \
} while (0)
#define R256_UNROLL_R(NN) \
((SKEIN_UNROLL_256 == 0 && \
SKEIN_256_ROUNDS_TOTAL / 8 > (NN)) || \
(SKEIN_UNROLL_256 > (NN)))
#if (SKEIN_UNROLL_256 > 14)
#error "need more unrolling in skein_256_process_block"
#endif
#endif
#if !(SKEIN_USE_ASM & 512)
#undef RCNT
#define RCNT (SKEIN_512_ROUNDS_TOTAL / 8)
#ifdef SKEIN_LOOP /* configure how much to unroll the loop */
#define SKEIN_UNROLL_512 (((SKEIN_LOOP) / 10) % 10)
#else
#define SKEIN_UNROLL_512 (0)
#endif
#if SKEIN_UNROLL_512
#if (RCNT % SKEIN_UNROLL_512)
#error "Invalid SKEIN_UNROLL_512" /* sanity check on unroll count */
#endif
#endif
#define ROUND512(p0, p1, p2, p3, p4, p5, p6, p7, ROT, r_num) \
do { \
X##p0 += X##p1; \
X##p1 = rol64(X##p1, ROT##_0); \
X##p1 ^= X##p0; \
X##p2 += X##p3; \
X##p3 = rol64(X##p3, ROT##_1); \
X##p3 ^= X##p2; \
X##p4 += X##p5; \
X##p5 = rol64(X##p5, ROT##_2); \
X##p5 ^= X##p4; \
X##p6 += X##p7; \
X##p7 = rol64(X##p7, ROT##_3); \
X##p7 ^= X##p6; \
} while (0)
#if SKEIN_UNROLL_512 == 0
#define R512(p0, p1, p2, p3, p4, p5, p6, p7, ROT, r_num) /* unrolled */ \
ROUND512(p0, p1, p2, p3, p4, p5, p6, p7, ROT, r_num)
#define I512(R) \
do { \
/* inject the key schedule value */ \
X0 += ks[((R) + 1) % 9]; \
X1 += ks[((R) + 2) % 9]; \
X2 += ks[((R) + 3) % 9]; \
X3 += ks[((R) + 4) % 9]; \
X4 += ks[((R) + 5) % 9]; \
X5 += ks[((R) + 6) % 9] + ts[((R) + 1) % 3]; \
X6 += ks[((R) + 7) % 9] + ts[((R) + 2) % 3]; \
X7 += ks[((R) + 8) % 9] + (R) + 1; \
} while (0)
#else /* looping version */
#define R512(p0, p1, p2, p3, p4, p5, p6, p7, ROT, r_num) \
ROUND512(p0, p1, p2, p3, p4, p5, p6, p7, ROT, r_num) \
#define I512(R) \
do { \
/* inject the key schedule value */ \
X0 += ks[r + (R) + 0]; \
X1 += ks[r + (R) + 1]; \
X2 += ks[r + (R) + 2]; \
X3 += ks[r + (R) + 3]; \
X4 += ks[r + (R) + 4]; \
X5 += ks[r + (R) + 5] + ts[r + (R) + 0]; \
X6 += ks[r + (R) + 6] + ts[r + (R) + 1]; \
X7 += ks[r + (R) + 7] + r + (R); \
/* rotate key schedule */ \
ks[r + (R) + 8] = ks[r + (R) - 1]; \
ts[r + (R) + 2] = ts[r + (R) - 1]; \
} while (0)
#endif /* end of looped code definitions */
#define R512_8_ROUNDS(R) /* do 8 full rounds */ \
do { \
R512(0, 1, 2, 3, 4, 5, 6, 7, R_512_0, 8 * (R) + 1); \
R512(2, 1, 4, 7, 6, 5, 0, 3, R_512_1, 8 * (R) + 2); \
R512(4, 1, 6, 3, 0, 5, 2, 7, R_512_2, 8 * (R) + 3); \
R512(6, 1, 0, 7, 2, 5, 4, 3, R_512_3, 8 * (R) + 4); \
I512(2 * (R)); \
R512(0, 1, 2, 3, 4, 5, 6, 7, R_512_4, 8 * (R) + 5); \
R512(2, 1, 4, 7, 6, 5, 0, 3, R_512_5, 8 * (R) + 6); \
R512(4, 1, 6, 3, 0, 5, 2, 7, R_512_6, 8 * (R) + 7); \
R512(6, 1, 0, 7, 2, 5, 4, 3, R_512_7, 8 * (R) + 8); \
I512(2 * (R) + 1); /* and key injection */ \
} while (0)
#define R512_UNROLL_R(NN) \
((SKEIN_UNROLL_512 == 0 && \
SKEIN_512_ROUNDS_TOTAL / 8 > (NN)) || \
(SKEIN_UNROLL_512 > (NN)))
#if (SKEIN_UNROLL_512 > 14)
#error "need more unrolling in skein_512_process_block"
#endif
#endif
#if !(SKEIN_USE_ASM & 1024)
#undef RCNT
#define RCNT (SKEIN_1024_ROUNDS_TOTAL / 8)
#ifdef SKEIN_LOOP /* configure how much to unroll the loop */
#define SKEIN_UNROLL_1024 ((SKEIN_LOOP) % 10)
#else
#define SKEIN_UNROLL_1024 (0)
#endif
#if (SKEIN_UNROLL_1024 != 0)
#if (RCNT % SKEIN_UNROLL_1024)
#error "Invalid SKEIN_UNROLL_1024" /* sanity check on unroll count */
#endif
#endif
#define ROUND1024(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, pA, pB, pC, pD, pE, \
pF, ROT, r_num) \
do { \
X##p0 += X##p1; \
X##p1 = rol64(X##p1, ROT##_0); \
X##p1 ^= X##p0; \
X##p2 += X##p3; \
X##p3 = rol64(X##p3, ROT##_1); \
X##p3 ^= X##p2; \
X##p4 += X##p5; \
X##p5 = rol64(X##p5, ROT##_2); \
X##p5 ^= X##p4; \
X##p6 += X##p7; \
X##p7 = rol64(X##p7, ROT##_3); \
X##p7 ^= X##p6; \
X##p8 += X##p9; \
X##p9 = rol64(X##p9, ROT##_4); \
X##p9 ^= X##p8; \
X##pA += X##pB; \
X##pB = rol64(X##pB, ROT##_5); \
X##pB ^= X##pA; \
X##pC += X##pD; \
X##pD = rol64(X##pD, ROT##_6); \
X##pD ^= X##pC; \
X##pE += X##pF; \
X##pF = rol64(X##pF, ROT##_7); \
X##pF ^= X##pE; \
} while (0)
#if SKEIN_UNROLL_1024 == 0
#define R1024(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, pA, pB, pC, pD, pE, pF, \
ROT, rn) \
ROUND1024(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, pA, pB, pC, pD, pE, \
pF, ROT, rn) \
#define I1024(R) \
do { \
/* inject the key schedule value */ \
X00 += ks[((R) + 1) % 17]; \
X01 += ks[((R) + 2) % 17]; \
X02 += ks[((R) + 3) % 17]; \
X03 += ks[((R) + 4) % 17]; \
X04 += ks[((R) + 5) % 17]; \
X05 += ks[((R) + 6) % 17]; \
X06 += ks[((R) + 7) % 17]; \
X07 += ks[((R) + 8) % 17]; \
X08 += ks[((R) + 9) % 17]; \
X09 += ks[((R) + 10) % 17]; \
X10 += ks[((R) + 11) % 17]; \
X11 += ks[((R) + 12) % 17]; \
X12 += ks[((R) + 13) % 17]; \
X13 += ks[((R) + 14) % 17] + ts[((R) + 1) % 3]; \
X14 += ks[((R) + 15) % 17] + ts[((R) + 2) % 3]; \
X15 += ks[((R) + 16) % 17] + (R) + 1; \
} while (0)
#else /* looping version */
#define R1024(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, pA, pB, pC, pD, pE, pF, \
ROT, rn) \
ROUND1024(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, pA, pB, pC, pD, pE, \
pF, ROT, rn) \
#define I1024(R) \
do { \
/* inject the key schedule value */ \
X00 += ks[r + (R) + 0]; \
X01 += ks[r + (R) + 1]; \
X02 += ks[r + (R) + 2]; \
X03 += ks[r + (R) + 3]; \
X04 += ks[r + (R) + 4]; \
X05 += ks[r + (R) + 5]; \
X06 += ks[r + (R) + 6]; \
X07 += ks[r + (R) + 7]; \
X08 += ks[r + (R) + 8]; \
X09 += ks[r + (R) + 9]; \
X10 += ks[r + (R) + 10]; \
X11 += ks[r + (R) + 11]; \
X12 += ks[r + (R) + 12]; \
X13 += ks[r + (R) + 13] + ts[r + (R) + 0]; \
X14 += ks[r + (R) + 14] + ts[r + (R) + 1]; \
X15 += ks[r + (R) + 15] + r + (R); \
/* rotate key schedule */ \
ks[r + (R) + 16] = ks[r + (R) - 1]; \
ts[r + (R) + 2] = ts[r + (R) - 1]; \
} while (0)
#endif
#define R1024_8_ROUNDS(R) \
do { \
R1024(00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, \
13, 14, 15, R1024_0, 8 * (R) + 1); \
R1024(00, 09, 02, 13, 06, 11, 04, 15, 10, 07, 12, 03, 14, \
05, 08, 01, R1024_1, 8 * (R) + 2); \
R1024(00, 07, 02, 05, 04, 03, 06, 01, 12, 15, 14, 13, 08, \
11, 10, 09, R1024_2, 8 * (R) + 3); \
R1024(00, 15, 02, 11, 06, 13, 04, 09, 14, 01, 08, 05, 10, \
03, 12, 07, R1024_3, 8 * (R) + 4); \
I1024(2 * (R)); \
R1024(00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, \
13, 14, 15, R1024_4, 8 * (R) + 5); \
R1024(00, 09, 02, 13, 06, 11, 04, 15, 10, 07, 12, 03, 14, \
05, 08, 01, R1024_5, 8 * (R) + 6); \
R1024(00, 07, 02, 05, 04, 03, 06, 01, 12, 15, 14, 13, 08, \
11, 10, 09, R1024_6, 8 * (R) + 7); \
R1024(00, 15, 02, 11, 06, 13, 04, 09, 14, 01, 08, 05, 10, \
03, 12, 07, R1024_7, 8 * (R) + 8); \
I1024(2 * (R) + 1); \
} while (0)
#define R1024_UNROLL_R(NN) \
((SKEIN_UNROLL_1024 == 0 && \
SKEIN_1024_ROUNDS_TOTAL / 8 > (NN)) || \
(SKEIN_UNROLL_1024 > (NN)))
#if (SKEIN_UNROLL_1024 > 14)
#error "need more unrolling in Skein_1024_Process_Block"
#endif
#endif
void skein_256_process_block(struct skein_256_ctx *ctx, const u8 *blk_ptr,
size_t blk_cnt, size_t byte_cnt_add);
void skein_512_process_block(struct skein_512_ctx *ctx, const u8 *blk_ptr,
size_t blk_cnt, size_t byte_cnt_add);
void skein_1024_process_block(struct skein_1024_ctx *ctx, const u8 *blk_ptr,
size_t blk_cnt, size_t byte_cnt_add);
#endif
drivers/staging/skein/skein_generic.c deleted 100644 → 0
View file @ 7f5d8f71
/*
* Cryptographic API.
*
* Skein256 Hash Algorithm.
*
* Derived from cryptoapi implementation, adapted for in-place
* scatterlist interface.
*
* Copyright (c) Eric Rost <eric.rost@mybabylon.net>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
*/
#include <linux/types.h>
#include <linux/init.h>
#include <linux/module.h>
#include <crypto/internal/hash.h>
#include "skein_base.h"
static int skein256_init(struct shash_desc *desc)
{
return skein_256_init((struct skein_256_ctx *)shash_desc_ctx(desc),
SKEIN256_DIGEST_BIT_SIZE);
}
static int skein256_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
return skein_256_update((struct skein_256_ctx *)shash_desc_ctx(desc),
data, len);
}
static int skein256_final(struct shash_desc *desc, u8 *out)
{
return skein_256_final((struct skein_256_ctx *)shash_desc_ctx(desc),
out);
}
static int skein256_export(struct shash_desc *desc, void *out)
{
struct skein_256_ctx *sctx = shash_desc_ctx(desc);
memcpy(out, sctx, sizeof(*sctx));
return 0;
}
static int skein256_import(struct shash_desc *desc, const void *in)
{
struct skein_256_ctx *sctx = shash_desc_ctx(desc);
memcpy(sctx, in, sizeof(*sctx));
return 0;
}
static int skein512_init(struct shash_desc *desc)
{
return skein_512_init((struct skein_512_ctx *)shash_desc_ctx(desc),
SKEIN512_DIGEST_BIT_SIZE);
}
static int skein512_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
return skein_512_update((struct skein_512_ctx *)shash_desc_ctx(desc),
data, len);
}
static int skein512_final(struct shash_desc *desc, u8 *out)
{
return skein_512_final((struct skein_512_ctx *)shash_desc_ctx(desc),
out);
}
static int skein512_export(struct shash_desc *desc, void *out)
{
struct skein_512_ctx *sctx = shash_desc_ctx(desc);
memcpy(out, sctx, sizeof(*sctx));
return 0;
}
static int skein512_import(struct shash_desc *desc, const void *in)
{
struct skein_512_ctx *sctx = shash_desc_ctx(desc);
memcpy(sctx, in, sizeof(*sctx));
return 0;
}
static int skein1024_init(struct shash_desc *desc)
{
return skein_1024_init((struct skein_1024_ctx *)shash_desc_ctx(desc),
SKEIN1024_DIGEST_BIT_SIZE);
}
static int skein1024_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
return skein_1024_update((struct skein_1024_ctx *)shash_desc_ctx(desc),
data, len);
}
static int skein1024_final(struct shash_desc *desc, u8 *out)
{
return skein_1024_final((struct skein_1024_ctx *)shash_desc_ctx(desc),
out);
}
static int skein1024_export(struct shash_desc *desc, void *out)
{
struct skein_1024_ctx *sctx = shash_desc_ctx(desc);
memcpy(out, sctx, sizeof(*sctx));
return 0;
}
static int skein1024_import(struct shash_desc *desc, const void *in)
{
struct skein_1024_ctx *sctx = shash_desc_ctx(desc);
memcpy(sctx, in, sizeof(*sctx));
return 0;
}
static struct shash_alg alg256 = {
.digestsize = (SKEIN256_DIGEST_BIT_SIZE / 8),
.init = skein256_init,
.update = skein256_update,
.final = skein256_final,
.export = skein256_export,
.import = skein256_import,
.descsize = sizeof(struct skein_256_ctx),
.statesize = sizeof(struct skein_256_ctx),
.base = {
.cra_name = "skein256",
.cra_driver_name = "skein",
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.cra_blocksize = SKEIN_256_BLOCK_BYTES,
.cra_module = THIS_MODULE,
}
};
static struct shash_alg alg512 = {
.digestsize = (SKEIN512_DIGEST_BIT_SIZE / 8),
.init = skein512_init,
.update = skein512_update,
.final = skein512_final,
.export = skein512_export,
.import = skein512_import,
.descsize = sizeof(struct skein_512_ctx),
.statesize = sizeof(struct skein_512_ctx),
.base = {
.cra_name = "skein512",
.cra_driver_name = "skein",
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.cra_blocksize = SKEIN_512_BLOCK_BYTES,
.cra_module = THIS_MODULE,
}
};
static struct shash_alg alg1024 = {
.digestsize = (SKEIN1024_DIGEST_BIT_SIZE / 8),
.init = skein1024_init,
.update = skein1024_update,
.final = skein1024_final,
.export = skein1024_export,
.import = skein1024_import,
.descsize = sizeof(struct skein_1024_ctx),
.statesize = sizeof(struct skein_1024_ctx),
.base = {
.cra_name = "skein1024",
.cra_driver_name = "skein",
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.cra_blocksize = SKEIN_1024_BLOCK_BYTES,
.cra_module = THIS_MODULE,
}
};
static int __init skein_generic_init(void)
{
if (crypto_register_shash(&alg256))
goto out;
if (crypto_register_shash(&alg512))
goto unreg256;
if (crypto_register_shash(&alg1024))
goto unreg512;
return 0;
unreg512:
crypto_unregister_shash(&alg512);
unreg256:
crypto_unregister_shash(&alg256);
out:
return -1;
}
static void __exit skein_generic_fini(void)
{
crypto_unregister_shash(&alg256);
crypto_unregister_shash(&alg512);
crypto_unregister_shash(&alg1024);
}
module_init(skein_generic_init);
module_exit(skein_generic_fini);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Skein Hash Algorithm");
MODULE_ALIAS("skein");
drivers/staging/skein/skein_iv.h deleted 100644 → 0
View file @ 7f5d8f71
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _SKEIN_IV_H_
#define _SKEIN_IV_H_
#include "skein_base.h" /* get Skein macros and types */
/*
**************** Pre-computed Skein IVs *******************
*
* NOTE: these values are not "magic" constants, but
* are generated using the Threefish block function.
* They are pre-computed here only for speed; i.e., to
* avoid the need for a Threefish call during Init().
*
* The IV for any fixed hash length may be pre-computed.
* Only the most common values are included here.
*
***********************************************************
*/
#define MK_64 SKEIN_MK_64
/* blkSize = 256 bits. hashSize = 128 bits */
static const u64 SKEIN_256_IV_128[] = {
MK_64(0xE1111906, 0x964D7260),
MK_64(0x883DAAA7, 0x7C8D811C),
MK_64(0x10080DF4, 0x91960F7A),
MK_64(0xCCF7DDE5, 0xB45BC1C2)
};
/* blkSize = 256 bits. hashSize = 160 bits */
static const u64 SKEIN_256_IV_160[] = {
MK_64(0x14202314, 0x72825E98),
MK_64(0x2AC4E9A2, 0x5A77E590),
MK_64(0xD47A5856, 0x8838D63E),
MK_64(0x2DD2E496, 0x8586AB7D)
};
/* blkSize = 256 bits. hashSize = 224 bits */
static const u64 SKEIN_256_IV_224[] = {
MK_64(0xC6098A8C, 0x9AE5EA0B),
MK_64(0x876D5686, 0x08C5191C),
MK_64(0x99CB88D7, 0xD7F53884),
MK_64(0x384BDDB1, 0xAEDDB5DE)
};
/* blkSize = 256 bits. hashSize = 256 bits */
static const u64 SKEIN_256_IV_256[] = {
MK_64(0xFC9DA860, 0xD048B449),
MK_64(0x2FCA6647, 0x9FA7D833),
MK_64(0xB33BC389, 0x6656840F),
MK_64(0x6A54E920, 0xFDE8DA69)
};
/* blkSize = 512 bits. hashSize = 128 bits */
static const u64 SKEIN_512_IV_128[] = {
MK_64(0xA8BC7BF3, 0x6FBF9F52),
MK_64(0x1E9872CE, 0xBD1AF0AA),
MK_64(0x309B1790, 0xB32190D3),
MK_64(0xBCFBB854, 0x3F94805C),
MK_64(0x0DA61BCD, 0x6E31B11B),
MK_64(0x1A18EBEA, 0xD46A32E3),
MK_64(0xA2CC5B18, 0xCE84AA82),
MK_64(0x6982AB28, 0x9D46982D)
};
/* blkSize = 512 bits. hashSize = 160 bits */
static const u64 SKEIN_512_IV_160[] = {
MK_64(0x28B81A2A, 0xE013BD91),
MK_64(0xC2F11668, 0xB5BDF78F),
MK_64(0x1760D8F3, 0xF6A56F12),
MK_64(0x4FB74758, 0x8239904F),
MK_64(0x21EDE07F, 0x7EAF5056),
MK_64(0xD908922E, 0x63ED70B8),
MK_64(0xB8EC76FF, 0xECCB52FA),
MK_64(0x01A47BB8, 0xA3F27A6E)
};
/* blkSize = 512 bits. hashSize = 224 bits */
static const u64 SKEIN_512_IV_224[] = {
MK_64(0xCCD06162, 0x48677224),
MK_64(0xCBA65CF3, 0xA92339EF),
MK_64(0x8CCD69D6, 0x52FF4B64),
MK_64(0x398AED7B, 0x3AB890B4),
MK_64(0x0F59D1B1, 0x457D2BD0),
MK_64(0x6776FE65, 0x75D4EB3D),
MK_64(0x99FBC70E, 0x997413E9),
MK_64(0x9E2CFCCF, 0xE1C41EF7)
};
/* blkSize = 512 bits. hashSize = 256 bits */
static const u64 SKEIN_512_IV_256[] = {
MK_64(0xCCD044A1, 0x2FDB3E13),
MK_64(0xE8359030, 0x1A79A9EB),
MK_64(0x55AEA061, 0x4F816E6F),
MK_64(0x2A2767A4, 0xAE9B94DB),
MK_64(0xEC06025E, 0x74DD7683),
MK_64(0xE7A436CD, 0xC4746251),
MK_64(0xC36FBAF9, 0x393AD185),
MK_64(0x3EEDBA18, 0x33EDFC13)
};
/* blkSize = 512 bits. hashSize = 384 bits */
static const u64 SKEIN_512_IV_384[] = {
MK_64(0xA3F6C6BF, 0x3A75EF5F),
MK_64(0xB0FEF9CC, 0xFD84FAA4),
MK_64(0x9D77DD66, 0x3D770CFE),
MK_64(0xD798CBF3, 0xB468FDDA),
MK_64(0x1BC4A666, 0x8A0E4465),
MK_64(0x7ED7D434, 0xE5807407),
MK_64(0x548FC1AC, 0xD4EC44D6),
MK_64(0x266E1754, 0x6AA18FF8)
};
/* blkSize = 512 bits. hashSize = 512 bits */
static const u64 SKEIN_512_IV_512[] = {
MK_64(0x4903ADFF, 0x749C51CE),
MK_64(0x0D95DE39, 0x9746DF03),
MK_64(0x8FD19341, 0x27C79BCE),
MK_64(0x9A255629, 0xFF352CB1),
MK_64(0x5DB62599, 0xDF6CA7B0),
MK_64(0xEABE394C, 0xA9D5C3F4),
MK_64(0x991112C7, 0x1A75B523),
MK_64(0xAE18A40B, 0x660FCC33)
};
/* blkSize = 1024 bits. hashSize = 384 bits */
static const u64 SKEIN_1024_IV_384[] = {
MK_64(0x5102B6B8, 0xC1894A35),
MK_64(0xFEEBC9E3, 0xFE8AF11A),
MK_64(0x0C807F06, 0xE32BED71),
MK_64(0x60C13A52, 0xB41A91F6),
MK_64(0x9716D35D, 0xD4917C38),
MK_64(0xE780DF12, 0x6FD31D3A),
MK_64(0x797846B6, 0xC898303A),
MK_64(0xB172C2A8, 0xB3572A3B),
MK_64(0xC9BC8203, 0xA6104A6C),
MK_64(0x65909338, 0xD75624F4),
MK_64(0x94BCC568, 0x4B3F81A0),
MK_64(0x3EBBF51E, 0x10ECFD46),
MK_64(0x2DF50F0B, 0xEEB08542),
MK_64(0x3B5A6530, 0x0DBC6516),
MK_64(0x484B9CD2, 0x167BBCE1),
MK_64(0x2D136947, 0xD4CBAFEA)
};
/* blkSize = 1024 bits. hashSize = 512 bits */
static const u64 SKEIN_1024_IV_512[] = {
MK_64(0xCAEC0E5D, 0x7C1B1B18),
MK_64(0xA01B0E04, 0x5F03E802),
MK_64(0x33840451, 0xED912885),
MK_64(0x374AFB04, 0xEAEC2E1C),
MK_64(0xDF25A0E2, 0x813581F7),
MK_64(0xE4004093, 0x8B12F9D2),
MK_64(0xA662D539, 0xC2ED39B6),
MK_64(0xFA8B85CF, 0x45D8C75A),
MK_64(0x8316ED8E, 0x29EDE796),
MK_64(0x053289C0, 0x2E9F91B8),
MK_64(0xC3F8EF1D, 0x6D518B73),
MK_64(0xBDCEC3C4, 0xD5EF332E),
MK_64(0x549A7E52, 0x22974487),
MK_64(0x67070872, 0x5B749816),
MK_64(0xB9CD28FB, 0xF0581BD1),
MK_64(0x0E2940B8, 0x15804974)
};
/* blkSize = 1024 bits. hashSize = 1024 bits */
static const u64 SKEIN_1024_IV_1024[] = {
MK_64(0xD593DA07, 0x41E72355),
MK_64(0x15B5E511, 0xAC73E00C),
MK_64(0x5180E5AE, 0xBAF2C4F0),
MK_64(0x03BD41D3, 0xFCBCAFAF),
MK_64(0x1CAEC6FD, 0x1983A898),
MK_64(0x6E510B8B, 0xCDD0589F),
MK_64(0x77E2BDFD, 0xC6394ADA),
MK_64(0xC11E1DB5, 0x24DCB0A3),
MK_64(0xD6D14AF9, 0xC6329AB5),
MK_64(0x6A9B0BFC, 0x6EB67E0D),
MK_64(0x9243C60D, 0xCCFF1332),
MK_64(0x1A1F1DDE, 0x743F02D4),
MK_64(0x0996753C, 0x10ED0BB8),
MK_64(0x6572DD22, 0xF2B4969A),
MK_64(0x61FD3062, 0xD00A579A),
MK_64(0x1DE0536E, 0x8682E539)
};
#endif /* _SKEIN_IV_H_ */
drivers/staging/skein/threefish_api.c deleted 100644 → 0
View file @ 7f5d8f71
// SPDX-License-Identifier: GPL-2.0
#include <linux/string.h>
#include "threefish_api.h"
void threefish_set_key(struct threefish_key *key_ctx,
enum threefish_size state_size,
u64 *key_data, u64 *tweak)
{
int key_words = state_size / 64;
int i;
u64 parity = KEY_SCHEDULE_CONST;
key_ctx->tweak[0] = tweak[0];
key_ctx->tweak[1] = tweak[1];
key_ctx->tweak[2] = tweak[0] ^ tweak[1];
for (i = 0; i < key_words; i++) {
key_ctx->key[i] = key_data[i];
parity ^= key_data[i];
}
key_ctx->key[i] = parity;
key_ctx->state_size = state_size;
}
void threefish_encrypt_block_bytes(struct threefish_key *key_ctx, u8 *in,
u8 *out)
{
u64 plain[SKEIN_MAX_STATE_WORDS]; /* max number of words*/
u64 cipher[SKEIN_MAX_STATE_WORDS];
skein_get64_lsb_first(plain, in, key_ctx->state_size / 64);
threefish_encrypt_block_words(key_ctx, plain, cipher);
skein_put64_lsb_first(out, cipher, key_ctx->state_size / 8);
}
void threefish_encrypt_block_words(struct threefish_key *key_ctx, u64 *in,
u64 *out)
{
switch (key_ctx->state_size) {
case THREEFISH_256:
threefish_encrypt_256(key_ctx, in, out);
break;
case THREEFISH_512:
threefish_encrypt_512(key_ctx, in, out);
break;
case THREEFISH_1024:
threefish_encrypt_1024(key_ctx, in, out);
break;
}
}
void threefish_decrypt_block_bytes(struct threefish_key *key_ctx, u8 *in,
u8 *out)
{
u64 plain[SKEIN_MAX_STATE_WORDS]; /* max number of words*/
u64 cipher[SKEIN_MAX_STATE_WORDS];
skein_get64_lsb_first(cipher, in, key_ctx->state_size / 64);
threefish_decrypt_block_words(key_ctx, cipher, plain);
skein_put64_lsb_first(out, plain, key_ctx->state_size / 8);
}
void threefish_decrypt_block_words(struct threefish_key *key_ctx, u64 *in,
u64 *out)
{
switch (key_ctx->state_size) {
case THREEFISH_256:
threefish_decrypt_256(key_ctx, in, out);
break;
case THREEFISH_512:
threefish_decrypt_512(key_ctx, in, out);
break;
case THREEFISH_1024:
threefish_decrypt_1024(key_ctx, in, out);
break;
}
}
drivers/staging/skein/threefish_api.h deleted 100644 → 0
View file @ 7f5d8f71
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef THREEFISHAPI_H
#define THREEFISHAPI_H
/**
* @file threefish_api.h
* @brief A Threefish cipher API and its functions.
* @{
*
* This API and the functions that implement this API simplify the usage
* of the Threefish cipher. The design and the way to use the functions
* follow the openSSL design but at the same time take care of some Threefish
* specific behaviour and possibilities.
*
* These are the low level functions that deal with Threefish blocks only.
* Implementations for cipher modes such as ECB, CFB, or CBC may use these
* functions.
*
@code
// Threefish cipher context data
struct threefish_key key_ctx;
// Initialize the context
threefish_set_key(&key_ctx, THREEFISH_512, key, tweak);
// Encrypt
threefish_encrypt_block_bytes(&key_ctx, input, cipher);
@endcode
*/
#include <linux/types.h>
#include "skein_base.h"
#define KEY_SCHEDULE_CONST 0x1BD11BDAA9FC1A22L
/**
* Which Threefish size to use
*/
enum threefish_size {
THREEFISH_256 = 256, /*!< Skein with 256 bit state */
THREEFISH_512 = 512, /*!< Skein with 512 bit state */
THREEFISH_1024 = 1024 /*!< Skein with 1024 bit state */
};
/**
* Context for Threefish key and tweak words.
*
* This structure was setup with some know-how of the internal
* Skein structures, in particular ordering of header and size dependent
* variables. If Skein implementation changes this, the adapt these
* structures as well.
*/
struct threefish_key {
u64 state_size;
u64 key[SKEIN_MAX_STATE_WORDS + 1]; /* max number of key words*/
u64 tweak[3];
};
/**
* Set Threefish key and tweak data.
*
* This function sets the key and tweak data for the Threefish cipher of
* the given size. The key data must have the same length (number of bits)
* as the state size
*
* @param key_ctx
* Pointer to a Threefish key structure.
* @param size
* Which Skein size to use.
* @param key_data
* Pointer to the key words (word has 64 bits).
* @param tweak
* Pointer to the two tweak words (word has 64 bits).
*/
void threefish_set_key(struct threefish_key *key_ctx,
enum threefish_size state_size,
u64 *key_data, u64 *tweak);
/**
* Encrypt Threefish block (bytes).
*
* The buffer must have at least the same length (number of bits) as the
* state size for this key. The function uses the first @c state_size bits
* of the input buffer, encrypts them and stores the result in the output
* buffer.
*
* @param key_ctx
* Pointer to a Threefish key structure.
* @param in
* Poionter to plaintext data buffer.
* @param out
* Pointer to cipher buffer.
*/
void threefish_encrypt_block_bytes(struct threefish_key *key_ctx, u8 *in,
u8 *out);
/**
* Encrypt Threefish block (words).
*
* The buffer must have at least the same length (number of bits) as the
* state size for this key. The function uses the first @c state_size bits
* of the input buffer, encrypts them and stores the result in the output
* buffer.
*
* The wordsize ist set to 64 bits.
*
* @param key_ctx
* Pointer to a Threefish key structure.
* @param in
* Poionter to plaintext data buffer.
* @param out
* Pointer to cipher buffer.
*/
void threefish_encrypt_block_words(struct threefish_key *key_ctx, u64 *in,
u64 *out);
/**
* Decrypt Threefish block (bytes).
*
* The buffer must have at least the same length (number of bits) as the
* state size for this key. The function uses the first @c state_size bits
* of the input buffer, decrypts them and stores the result in the output
* buffer
*
* @param key_ctx
* Pointer to a Threefish key structure.
* @param in
* Poionter to cipher data buffer.
* @param out
* Pointer to plaintext buffer.
*/
void threefish_decrypt_block_bytes(struct threefish_key *key_ctx, u8 *in,
u8 *out);
/**
* Decrypt Threefish block (words).
*
* The buffer must have at least the same length (number of bits) as the
* state size for this key. The function uses the first @c state_size bits
* of the input buffer, encrypts them and stores the result in the output
* buffer.
*
* The wordsize ist set to 64 bits.
*
* @param key_ctx
* Pointer to a Threefish key structure.
* @param in
* Poionter to cipher data buffer.
* @param out
* Pointer to plaintext buffer.
*/
void threefish_decrypt_block_words(struct threefish_key *key_ctx, u64 *in,
u64 *out);
void threefish_encrypt_256(struct threefish_key *key_ctx, u64 *input,
u64 *output);
void threefish_encrypt_512(struct threefish_key *key_ctx, u64 *input,
u64 *output);
void threefish_encrypt_1024(struct threefish_key *key_ctx, u64 *input,
u64 *output);
void threefish_decrypt_256(struct threefish_key *key_ctx, u64 *input,
u64 *output);
void threefish_decrypt_512(struct threefish_key *key_ctx, u64 *input,
u64 *output);
void threefish_decrypt_1024(struct threefish_key *key_ctx, u64 *input,
u64 *output);
/**
* @}
*/
#endif
drivers/staging/skein/threefish_block.c deleted 100644 → 0
View file @ 7f5d8f71
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