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-rw-r--r--arch/x86/crypto/glue_helper.c381
1 files changed, 0 insertions, 381 deletions
diff --git a/arch/x86/crypto/glue_helper.c b/arch/x86/crypto/glue_helper.c
deleted file mode 100644
index d3d91a0abf88..000000000000
--- a/arch/x86/crypto/glue_helper.c
+++ /dev/null
@@ -1,381 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Shared glue code for 128bit block ciphers
- *
- * Copyright © 2012-2013 Jussi Kivilinna <jussi.kivilinna@iki.fi>
- *
- * CBC & ECB parts based on code (crypto/cbc.c,ecb.c) by:
- * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
- * CTR part based on code (crypto/ctr.c) by:
- * (C) Copyright IBM Corp. 2007 - Joy Latten <latten@us.ibm.com>
- */
-
-#include <linux/module.h>
-#include <crypto/b128ops.h>
-#include <crypto/gf128mul.h>
-#include <crypto/internal/skcipher.h>
-#include <crypto/scatterwalk.h>
-#include <crypto/xts.h>
-#include <asm/crypto/glue_helper.h>
-
-int glue_ecb_req_128bit(const struct common_glue_ctx *gctx,
- struct skcipher_request *req)
-{
- void *ctx = crypto_skcipher_ctx(crypto_skcipher_reqtfm(req));
- const unsigned int bsize = 128 / 8;
- struct skcipher_walk walk;
- bool fpu_enabled = false;
- unsigned int nbytes;
- int err;
-
- err = skcipher_walk_virt(&walk, req, false);
-
- while ((nbytes = walk.nbytes)) {
- const u8 *src = walk.src.virt.addr;
- u8 *dst = walk.dst.virt.addr;
- unsigned int func_bytes;
- unsigned int i;
-
- fpu_enabled = glue_fpu_begin(bsize, gctx->fpu_blocks_limit,
- &walk, fpu_enabled, nbytes);
- for (i = 0; i < gctx->num_funcs; i++) {
- func_bytes = bsize * gctx->funcs[i].num_blocks;
-
- if (nbytes < func_bytes)
- continue;
-
- /* Process multi-block batch */
- do {
- gctx->funcs[i].fn_u.ecb(ctx, dst, src);
- src += func_bytes;
- dst += func_bytes;
- nbytes -= func_bytes;
- } while (nbytes >= func_bytes);
-
- if (nbytes < bsize)
- break;
- }
- err = skcipher_walk_done(&walk, nbytes);
- }
-
- glue_fpu_end(fpu_enabled);
- return err;
-}
-EXPORT_SYMBOL_GPL(glue_ecb_req_128bit);
-
-int glue_cbc_encrypt_req_128bit(const common_glue_func_t fn,
- struct skcipher_request *req)
-{
- void *ctx = crypto_skcipher_ctx(crypto_skcipher_reqtfm(req));
- const unsigned int bsize = 128 / 8;
- struct skcipher_walk walk;
- unsigned int nbytes;
- int err;
-
- err = skcipher_walk_virt(&walk, req, false);
-
- while ((nbytes = walk.nbytes)) {
- const u128 *src = (u128 *)walk.src.virt.addr;
- u128 *dst = (u128 *)walk.dst.virt.addr;
- u128 *iv = (u128 *)walk.iv;
-
- do {
- u128_xor(dst, src, iv);
- fn(ctx, (u8 *)dst, (u8 *)dst);
- iv = dst;
- src++;
- dst++;
- nbytes -= bsize;
- } while (nbytes >= bsize);
-
- *(u128 *)walk.iv = *iv;
- err = skcipher_walk_done(&walk, nbytes);
- }
- return err;
-}
-EXPORT_SYMBOL_GPL(glue_cbc_encrypt_req_128bit);
-
-int glue_cbc_decrypt_req_128bit(const struct common_glue_ctx *gctx,
- struct skcipher_request *req)
-{
- void *ctx = crypto_skcipher_ctx(crypto_skcipher_reqtfm(req));
- const unsigned int bsize = 128 / 8;
- struct skcipher_walk walk;
- bool fpu_enabled = false;
- unsigned int nbytes;
- int err;
-
- err = skcipher_walk_virt(&walk, req, false);
-
- while ((nbytes = walk.nbytes)) {
- const u128 *src = walk.src.virt.addr;
- u128 *dst = walk.dst.virt.addr;
- unsigned int func_bytes, num_blocks;
- unsigned int i;
- u128 last_iv;
-
- fpu_enabled = glue_fpu_begin(bsize, gctx->fpu_blocks_limit,
- &walk, fpu_enabled, nbytes);
- /* Start of the last block. */
- src += nbytes / bsize - 1;
- dst += nbytes / bsize - 1;
-
- last_iv = *src;
-
- for (i = 0; i < gctx->num_funcs; i++) {
- num_blocks = gctx->funcs[i].num_blocks;
- func_bytes = bsize * num_blocks;
-
- if (nbytes < func_bytes)
- continue;
-
- /* Process multi-block batch */
- do {
- src -= num_blocks - 1;
- dst -= num_blocks - 1;
-
- gctx->funcs[i].fn_u.cbc(ctx, (u8 *)dst,
- (const u8 *)src);
-
- nbytes -= func_bytes;
- if (nbytes < bsize)
- goto done;
-
- u128_xor(dst, dst, --src);
- dst--;
- } while (nbytes >= func_bytes);
- }
-done:
- u128_xor(dst, dst, (u128 *)walk.iv);
- *(u128 *)walk.iv = last_iv;
- err = skcipher_walk_done(&walk, nbytes);
- }
-
- glue_fpu_end(fpu_enabled);
- return err;
-}
-EXPORT_SYMBOL_GPL(glue_cbc_decrypt_req_128bit);
-
-int glue_ctr_req_128bit(const struct common_glue_ctx *gctx,
- struct skcipher_request *req)
-{
- void *ctx = crypto_skcipher_ctx(crypto_skcipher_reqtfm(req));
- const unsigned int bsize = 128 / 8;
- struct skcipher_walk walk;
- bool fpu_enabled = false;
- unsigned int nbytes;
- int err;
-
- err = skcipher_walk_virt(&walk, req, false);
-
- while ((nbytes = walk.nbytes) >= bsize) {
- const u128 *src = walk.src.virt.addr;
- u128 *dst = walk.dst.virt.addr;
- unsigned int func_bytes, num_blocks;
- unsigned int i;
- le128 ctrblk;
-
- fpu_enabled = glue_fpu_begin(bsize, gctx->fpu_blocks_limit,
- &walk, fpu_enabled, nbytes);
-
- be128_to_le128(&ctrblk, (be128 *)walk.iv);
-
- for (i = 0; i < gctx->num_funcs; i++) {
- num_blocks = gctx->funcs[i].num_blocks;
- func_bytes = bsize * num_blocks;
-
- if (nbytes < func_bytes)
- continue;
-
- /* Process multi-block batch */
- do {
- gctx->funcs[i].fn_u.ctr(ctx, (u8 *)dst,
- (const u8 *)src,
- &ctrblk);
- src += num_blocks;
- dst += num_blocks;
- nbytes -= func_bytes;
- } while (nbytes >= func_bytes);
-
- if (nbytes < bsize)
- break;
- }
-
- le128_to_be128((be128 *)walk.iv, &ctrblk);
- err = skcipher_walk_done(&walk, nbytes);
- }
-
- glue_fpu_end(fpu_enabled);
-
- if (nbytes) {
- le128 ctrblk;
- u128 tmp;
-
- be128_to_le128(&ctrblk, (be128 *)walk.iv);
- memcpy(&tmp, walk.src.virt.addr, nbytes);
- gctx->funcs[gctx->num_funcs - 1].fn_u.ctr(ctx, (u8 *)&tmp,
- (const u8 *)&tmp,
- &ctrblk);
- memcpy(walk.dst.virt.addr, &tmp, nbytes);
- le128_to_be128((be128 *)walk.iv, &ctrblk);
-
- err = skcipher_walk_done(&walk, 0);
- }
-
- return err;
-}
-EXPORT_SYMBOL_GPL(glue_ctr_req_128bit);
-
-static unsigned int __glue_xts_req_128bit(const struct common_glue_ctx *gctx,
- void *ctx,
- struct skcipher_walk *walk)
-{
- const unsigned int bsize = 128 / 8;
- unsigned int nbytes = walk->nbytes;
- u128 *src = walk->src.virt.addr;
- u128 *dst = walk->dst.virt.addr;
- unsigned int num_blocks, func_bytes;
- unsigned int i;
-
- /* Process multi-block batch */
- for (i = 0; i < gctx->num_funcs; i++) {
- num_blocks = gctx->funcs[i].num_blocks;
- func_bytes = bsize * num_blocks;
-
- if (nbytes >= func_bytes) {
- do {
- gctx->funcs[i].fn_u.xts(ctx, (u8 *)dst,
- (const u8 *)src,
- walk->iv);
-
- src += num_blocks;
- dst += num_blocks;
- nbytes -= func_bytes;
- } while (nbytes >= func_bytes);
-
- if (nbytes < bsize)
- goto done;
- }
- }
-
-done:
- return nbytes;
-}
-
-int glue_xts_req_128bit(const struct common_glue_ctx *gctx,
- struct skcipher_request *req,
- common_glue_func_t tweak_fn, void *tweak_ctx,
- void *crypt_ctx, bool decrypt)
-{
- const bool cts = (req->cryptlen % XTS_BLOCK_SIZE);
- const unsigned int bsize = 128 / 8;
- struct skcipher_request subreq;
- struct skcipher_walk walk;
- bool fpu_enabled = false;
- unsigned int nbytes, tail;
- int err;
-
- if (req->cryptlen < XTS_BLOCK_SIZE)
- return -EINVAL;
-
- if (unlikely(cts)) {
- struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
-
- tail = req->cryptlen % XTS_BLOCK_SIZE + XTS_BLOCK_SIZE;
-
- skcipher_request_set_tfm(&subreq, tfm);
- skcipher_request_set_callback(&subreq,
- crypto_skcipher_get_flags(tfm),
- NULL, NULL);
- skcipher_request_set_crypt(&subreq, req->src, req->dst,
- req->cryptlen - tail, req->iv);
- req = &subreq;
- }
-
- err = skcipher_walk_virt(&walk, req, false);
- nbytes = walk.nbytes;
- if (err)
- return err;
-
- /* set minimum length to bsize, for tweak_fn */
- fpu_enabled = glue_fpu_begin(bsize, gctx->fpu_blocks_limit,
- &walk, fpu_enabled,
- nbytes < bsize ? bsize : nbytes);
-
- /* calculate first value of T */
- tweak_fn(tweak_ctx, walk.iv, walk.iv);
-
- while (nbytes) {
- nbytes = __glue_xts_req_128bit(gctx, crypt_ctx, &walk);
-
- err = skcipher_walk_done(&walk, nbytes);
- nbytes = walk.nbytes;
- }
-
- if (unlikely(cts)) {
- u8 *next_tweak, *final_tweak = req->iv;
- struct scatterlist *src, *dst;
- struct scatterlist s[2], d[2];
- le128 b[2];
-
- dst = src = scatterwalk_ffwd(s, req->src, req->cryptlen);
- if (req->dst != req->src)
- dst = scatterwalk_ffwd(d, req->dst, req->cryptlen);
-
- if (decrypt) {
- next_tweak = memcpy(b, req->iv, XTS_BLOCK_SIZE);
- gf128mul_x_ble(b, b);
- } else {
- next_tweak = req->iv;
- }
-
- skcipher_request_set_crypt(&subreq, src, dst, XTS_BLOCK_SIZE,
- next_tweak);
-
- err = skcipher_walk_virt(&walk, req, false) ?:
- skcipher_walk_done(&walk,
- __glue_xts_req_128bit(gctx, crypt_ctx, &walk));
- if (err)
- goto out;
-
- scatterwalk_map_and_copy(b, dst, 0, XTS_BLOCK_SIZE, 0);
- memcpy(b + 1, b, tail - XTS_BLOCK_SIZE);
- scatterwalk_map_and_copy(b, src, XTS_BLOCK_SIZE,
- tail - XTS_BLOCK_SIZE, 0);
- scatterwalk_map_and_copy(b, dst, 0, tail, 1);
-
- skcipher_request_set_crypt(&subreq, dst, dst, XTS_BLOCK_SIZE,
- final_tweak);
-
- err = skcipher_walk_virt(&walk, req, false) ?:
- skcipher_walk_done(&walk,
- __glue_xts_req_128bit(gctx, crypt_ctx, &walk));
- }
-
-out:
- glue_fpu_end(fpu_enabled);
-
- return err;
-}
-EXPORT_SYMBOL_GPL(glue_xts_req_128bit);
-
-void glue_xts_crypt_128bit_one(const void *ctx, u8 *dst, const u8 *src,
- le128 *iv, common_glue_func_t fn)
-{
- le128 ivblk = *iv;
-
- /* generate next IV */
- gf128mul_x_ble(iv, &ivblk);
-
- /* CC <- T xor C */
- u128_xor((u128 *)dst, (const u128 *)src, (u128 *)&ivblk);
-
- /* PP <- D(Key2,CC) */
- fn(ctx, dst, dst);
-
- /* P <- T xor PP */
- u128_xor((u128 *)dst, (u128 *)dst, (u128 *)&ivblk);
-}
-EXPORT_SYMBOL_GPL(glue_xts_crypt_128bit_one);
-
-MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-16 13:32:47 +0000