add ax88772_rst

hc

2024-05-10 9999e48639b3cecb08ffb37358bcba3b48161b29

 kernel/arch/x86/crypto/glue_helper.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * Shared glue code for 128bit block ciphers
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  *
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@@ -7,28 +8,13 @@
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  *   Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
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  * CTR part based on code (crypto/ctr.c) by:
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  *   (C) Copyright IBM Corp. 2007 - Joy Latten <latten@us.ibm.com>
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or
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- * (at your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, write to the Free Software
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- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
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- * USA
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- *
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  */
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12
 
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 #include <linux/module.h>
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 #include <crypto/b128ops.h>
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 #include <crypto/gf128mul.h>
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 #include <crypto/internal/skcipher.h>
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+#include <crypto/scatterwalk.h>
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 #include <crypto/xts.h>
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 #include <asm/crypto/glue_helper.h>
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20
 
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@@ -148,7 +134,8 @@
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 				src -= num_blocks - 1;
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 				dst -= num_blocks - 1;
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136
 
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-				gctx->funcs[i].fn_u.cbc(ctx, dst, src);
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+				gctx->funcs[i].fn_u.cbc(ctx, (u8 *)dst,
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+							(const u8 *)src);
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139
 
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 				nbytes -= func_bytes;
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 				if (nbytes < bsize)
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@@ -202,7 +189,9 @@
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189
 
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 			/* Process multi-block batch */
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 			do {
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-				gctx->funcs[i].fn_u.ctr(ctx, dst, src, &ctrblk);
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+				gctx->funcs[i].fn_u.ctr(ctx, (u8 *)dst,
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+							(const u8 *)src,
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+							&ctrblk);
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 				src += num_blocks;
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 				dst += num_blocks;
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 				nbytes -= func_bytes;
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..
@@ -224,7 +213,8 @@
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213
 
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 		be128_to_le128(&ctrblk, (be128 *)walk.iv);
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 		memcpy(&tmp, walk.src.virt.addr, nbytes);
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-		gctx->funcs[gctx->num_funcs - 1].fn_u.ctr(ctx, &tmp, &tmp,
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+		gctx->funcs[gctx->num_funcs - 1].fn_u.ctr(ctx, (u8 *)&tmp,
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+							  (const u8 *)&tmp,
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 							  &ctrblk);
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 		memcpy(walk.dst.virt.addr, &tmp, nbytes);
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 		le128_to_be128((be128 *)walk.iv, &ctrblk);
..
..
@@ -254,7 +244,8 @@
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244
 
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 		if (nbytes >= func_bytes) {
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 			do {
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-				gctx->funcs[i].fn_u.xts(ctx, dst, src,
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+				gctx->funcs[i].fn_u.xts(ctx, (u8 *)dst,
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+							(const u8 *)src,
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 							walk->iv);
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250
 
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 				src += num_blocks;
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@@ -274,17 +265,36 @@
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 int glue_xts_req_128bit(const struct common_glue_ctx *gctx,
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 			struct skcipher_request *req,
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 			common_glue_func_t tweak_fn, void *tweak_ctx,
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-			void *crypt_ctx)
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+			void *crypt_ctx, bool decrypt)
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 {
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+	const bool cts = (req->cryptlen % XTS_BLOCK_SIZE);
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 	const unsigned int bsize = 128 / 8;
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+	struct skcipher_request subreq;
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 	struct skcipher_walk walk;
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 	bool fpu_enabled = false;
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-	unsigned int nbytes;
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+	unsigned int nbytes, tail;
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 	int err;
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+
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+	if (req->cryptlen < XTS_BLOCK_SIZE)
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+		return -EINVAL;
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+
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+	if (unlikely(cts)) {
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+		struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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+
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+		tail = req->cryptlen % XTS_BLOCK_SIZE + XTS_BLOCK_SIZE;
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+
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+		skcipher_request_set_tfm(&subreq, tfm);
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+		skcipher_request_set_callback(&subreq,
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+					      crypto_skcipher_get_flags(tfm),
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+					      NULL, NULL);
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+		skcipher_request_set_crypt(&subreq, req->src, req->dst,
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+					   req->cryptlen - tail, req->iv);
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+		req = &subreq;
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+	}
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 	err = skcipher_walk_virt(&walk, req, false);
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 	nbytes = walk.nbytes;
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-	if (!nbytes)
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+	if (err)
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 		return err;
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 	/* set minimum length to bsize, for tweak_fn */
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@@ -302,14 +312,55 @@
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 		nbytes = walk.nbytes;
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 	}
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314
 
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+	if (unlikely(cts)) {
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+		u8 *next_tweak, *final_tweak = req->iv;
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+		struct scatterlist *src, *dst;
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+		struct scatterlist s[2], d[2];
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+		le128 b[2];
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+
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+		dst = src = scatterwalk_ffwd(s, req->src, req->cryptlen);
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+		if (req->dst != req->src)
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+			dst = scatterwalk_ffwd(d, req->dst, req->cryptlen);
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+
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+		if (decrypt) {
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+			next_tweak = memcpy(b, req->iv, XTS_BLOCK_SIZE);
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+			gf128mul_x_ble(b, b);
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+		} else {
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+			next_tweak = req->iv;
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+		}
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+
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+		skcipher_request_set_crypt(&subreq, src, dst, XTS_BLOCK_SIZE,
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+					   next_tweak);
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+
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+		err = skcipher_walk_virt(&walk, req, false) ?:
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+		      skcipher_walk_done(&walk,
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+				__glue_xts_req_128bit(gctx, crypt_ctx, &walk));
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+		if (err)
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+			goto out;
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+
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+		scatterwalk_map_and_copy(b, dst, 0, XTS_BLOCK_SIZE, 0);
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+		memcpy(b + 1, b, tail - XTS_BLOCK_SIZE);
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+		scatterwalk_map_and_copy(b, src, XTS_BLOCK_SIZE,
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+					 tail - XTS_BLOCK_SIZE, 0);
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+		scatterwalk_map_and_copy(b, dst, 0, tail, 1);
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+
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+		skcipher_request_set_crypt(&subreq, dst, dst, XTS_BLOCK_SIZE,
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+					   final_tweak);
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+
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+		err = skcipher_walk_virt(&walk, req, false) ?:
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+		      skcipher_walk_done(&walk,
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+				__glue_xts_req_128bit(gctx, crypt_ctx, &walk));
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+	}
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+
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+out:
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 	glue_fpu_end(fpu_enabled);
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 	return err;
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 }
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 EXPORT_SYMBOL_GPL(glue_xts_req_128bit);
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-void glue_xts_crypt_128bit_one(void *ctx, u128 *dst, const u128 *src, le128 *iv,
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-			       common_glue_func_t fn)
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+void glue_xts_crypt_128bit_one(const void *ctx, u8 *dst, const u8 *src,
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+			       le128 *iv, common_glue_func_t fn)
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 {
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 	le128 ivblk = *iv;
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366
 
..
..
@@ -317,13 +368,13 @@
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 	gf128mul_x_ble(iv, &ivblk);
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 	/* CC <- T xor C */
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-	u128_xor(dst, src, (u128 *)&ivblk);
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+	u128_xor((u128 *)dst, (const u128 *)src, (u128 *)&ivblk);
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 	/* PP <- D(Key2,CC) */
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-	fn(ctx, (u8 *)dst, (u8 *)dst);
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+	fn(ctx, dst, dst);
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 	/* P <- T xor PP */
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-	u128_xor(dst, dst, (u128 *)&ivblk);
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+	u128_xor((u128 *)dst, (u128 *)dst, (u128 *)&ivblk);
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 }
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 EXPORT_SYMBOL_GPL(glue_xts_crypt_128bit_one);
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