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-rw-r--r--crypto/ablkcipher.c407
1 files changed, 0 insertions, 407 deletions
diff --git a/crypto/ablkcipher.c b/crypto/ablkcipher.c
deleted file mode 100644
index 072b5646a0a3..000000000000
--- a/crypto/ablkcipher.c
+++ /dev/null
@@ -1,407 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Asynchronous block chaining cipher operations.
- *
- * This is the asynchronous version of blkcipher.c indicating completion
- * via a callback.
- *
- * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
- */
-
-#include <crypto/internal/skcipher.h>
-#include <linux/err.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/seq_file.h>
-#include <linux/cryptouser.h>
-#include <linux/compiler.h>
-#include <net/netlink.h>
-
-#include <crypto/scatterwalk.h>
-
-#include "internal.h"
-
-struct ablkcipher_buffer {
- struct list_head entry;
- struct scatter_walk dst;
- unsigned int len;
- void *data;
-};
-
-enum {
- ABLKCIPHER_WALK_SLOW = 1 << 0,
-};
-
-static inline void ablkcipher_buffer_write(struct ablkcipher_buffer *p)
-{
- scatterwalk_copychunks(p->data, &p->dst, p->len, 1);
-}
-
-void __ablkcipher_walk_complete(struct ablkcipher_walk *walk)
-{
- struct ablkcipher_buffer *p, *tmp;
-
- list_for_each_entry_safe(p, tmp, &walk->buffers, entry) {
- ablkcipher_buffer_write(p);
- list_del(&p->entry);
- kfree(p);
- }
-}
-EXPORT_SYMBOL_GPL(__ablkcipher_walk_complete);
-
-static inline void ablkcipher_queue_write(struct ablkcipher_walk *walk,
- struct ablkcipher_buffer *p)
-{
- p->dst = walk->out;
- list_add_tail(&p->entry, &walk->buffers);
-}
-
-/* Get a spot of the specified length that does not straddle a page.
- * The caller needs to ensure that there is enough space for this operation.
- */
-static inline u8 *ablkcipher_get_spot(u8 *start, unsigned int len)
-{
- u8 *end_page = (u8 *)(((unsigned long)(start + len - 1)) & PAGE_MASK);
-
- return max(start, end_page);
-}
-
-static inline void ablkcipher_done_slow(struct ablkcipher_walk *walk,
- unsigned int n)
-{
- for (;;) {
- unsigned int len_this_page = scatterwalk_pagelen(&walk->out);
-
- if (len_this_page > n)
- len_this_page = n;
- scatterwalk_advance(&walk->out, n);
- if (n == len_this_page)
- break;
- n -= len_this_page;
- scatterwalk_start(&walk->out, sg_next(walk->out.sg));
- }
-}
-
-static inline void ablkcipher_done_fast(struct ablkcipher_walk *walk,
- unsigned int n)
-{
- scatterwalk_advance(&walk->in, n);
- scatterwalk_advance(&walk->out, n);
-}
-
-static int ablkcipher_walk_next(struct ablkcipher_request *req,
- struct ablkcipher_walk *walk);
-
-int ablkcipher_walk_done(struct ablkcipher_request *req,
- struct ablkcipher_walk *walk, int err)
-{
- struct crypto_tfm *tfm = req->base.tfm;
- unsigned int n; /* bytes processed */
- bool more;
-
- if (unlikely(err < 0))
- goto finish;
-
- n = walk->nbytes - err;
- walk->total -= n;
- more = (walk->total != 0);
-
- if (likely(!(walk->flags & ABLKCIPHER_WALK_SLOW))) {
- ablkcipher_done_fast(walk, n);
- } else {
- if (WARN_ON(err)) {
- /* unexpected case; didn't process all bytes */
- err = -EINVAL;
- goto finish;
- }
- ablkcipher_done_slow(walk, n);
- }
-
- scatterwalk_done(&walk->in, 0, more);
- scatterwalk_done(&walk->out, 1, more);
-
- if (more) {
- crypto_yield(req->base.flags);
- return ablkcipher_walk_next(req, walk);
- }
- err = 0;
-finish:
- walk->nbytes = 0;
- if (walk->iv != req->info)
- memcpy(req->info, walk->iv, tfm->crt_ablkcipher.ivsize);
- kfree(walk->iv_buffer);
- return err;
-}
-EXPORT_SYMBOL_GPL(ablkcipher_walk_done);
-
-static inline int ablkcipher_next_slow(struct ablkcipher_request *req,
- struct ablkcipher_walk *walk,
- unsigned int bsize,
- unsigned int alignmask,
- void **src_p, void **dst_p)
-{
- unsigned aligned_bsize = ALIGN(bsize, alignmask + 1);
- struct ablkcipher_buffer *p;
- void *src, *dst, *base;
- unsigned int n;
-
- n = ALIGN(sizeof(struct ablkcipher_buffer), alignmask + 1);
- n += (aligned_bsize * 3 - (alignmask + 1) +
- (alignmask & ~(crypto_tfm_ctx_alignment() - 1)));
-
- p = kmalloc(n, GFP_ATOMIC);
- if (!p)
- return ablkcipher_walk_done(req, walk, -ENOMEM);
-
- base = p + 1;
-
- dst = (u8 *)ALIGN((unsigned long)base, alignmask + 1);
- src = dst = ablkcipher_get_spot(dst, bsize);
-
- p->len = bsize;
- p->data = dst;
-
- scatterwalk_copychunks(src, &walk->in, bsize, 0);
-
- ablkcipher_queue_write(walk, p);
-
- walk->nbytes = bsize;
- walk->flags |= ABLKCIPHER_WALK_SLOW;
-
- *src_p = src;
- *dst_p = dst;
-
- return 0;
-}
-
-static inline int ablkcipher_copy_iv(struct ablkcipher_walk *walk,
- struct crypto_tfm *tfm,
- unsigned int alignmask)
-{
- unsigned bs = walk->blocksize;
- unsigned int ivsize = tfm->crt_ablkcipher.ivsize;
- unsigned aligned_bs = ALIGN(bs, alignmask + 1);
- unsigned int size = aligned_bs * 2 + ivsize + max(aligned_bs, ivsize) -
- (alignmask + 1);
- u8 *iv;
-
- size += alignmask & ~(crypto_tfm_ctx_alignment() - 1);
- walk->iv_buffer = kmalloc(size, GFP_ATOMIC);
- if (!walk->iv_buffer)
- return -ENOMEM;
-
- iv = (u8 *)ALIGN((unsigned long)walk->iv_buffer, alignmask + 1);
- iv = ablkcipher_get_spot(iv, bs) + aligned_bs;
- iv = ablkcipher_get_spot(iv, bs) + aligned_bs;
- iv = ablkcipher_get_spot(iv, ivsize);
-
- walk->iv = memcpy(iv, walk->iv, ivsize);
- return 0;
-}
-
-static inline int ablkcipher_next_fast(struct ablkcipher_request *req,
- struct ablkcipher_walk *walk)
-{
- walk->src.page = scatterwalk_page(&walk->in);
- walk->src.offset = offset_in_page(walk->in.offset);
- walk->dst.page = scatterwalk_page(&walk->out);
- walk->dst.offset = offset_in_page(walk->out.offset);
-
- return 0;
-}
-
-static int ablkcipher_walk_next(struct ablkcipher_request *req,
- struct ablkcipher_walk *walk)
-{
- struct crypto_tfm *tfm = req->base.tfm;
- unsigned int alignmask, bsize, n;
- void *src, *dst;
- int err;
-
- alignmask = crypto_tfm_alg_alignmask(tfm);
- n = walk->total;
- if (unlikely(n < crypto_tfm_alg_blocksize(tfm))) {
- req->base.flags |= CRYPTO_TFM_RES_BAD_BLOCK_LEN;
- return ablkcipher_walk_done(req, walk, -EINVAL);
- }
-
- walk->flags &= ~ABLKCIPHER_WALK_SLOW;
- src = dst = NULL;
-
- bsize = min(walk->blocksize, n);
- n = scatterwalk_clamp(&walk->in, n);
- n = scatterwalk_clamp(&walk->out, n);
-
- if (n < bsize ||
- !scatterwalk_aligned(&walk->in, alignmask) ||
- !scatterwalk_aligned(&walk->out, alignmask)) {
- err = ablkcipher_next_slow(req, walk, bsize, alignmask,
- &src, &dst);
- goto set_phys_lowmem;
- }
-
- walk->nbytes = n;
-
- return ablkcipher_next_fast(req, walk);
-
-set_phys_lowmem:
- if (err >= 0) {
- walk->src.page = virt_to_page(src);
- walk->dst.page = virt_to_page(dst);
- walk->src.offset = ((unsigned long)src & (PAGE_SIZE - 1));
- walk->dst.offset = ((unsigned long)dst & (PAGE_SIZE - 1));
- }
-
- return err;
-}
-
-static int ablkcipher_walk_first(struct ablkcipher_request *req,
- struct ablkcipher_walk *walk)
-{
- struct crypto_tfm *tfm = req->base.tfm;
- unsigned int alignmask;
-
- alignmask = crypto_tfm_alg_alignmask(tfm);
- if (WARN_ON_ONCE(in_irq()))
- return -EDEADLK;
-
- walk->iv = req->info;
- walk->nbytes = walk->total;
- if (unlikely(!walk->total))
- return 0;
-
- walk->iv_buffer = NULL;
- if (unlikely(((unsigned long)walk->iv & alignmask))) {
- int err = ablkcipher_copy_iv(walk, tfm, alignmask);
-
- if (err)
- return err;
- }
-
- scatterwalk_start(&walk->in, walk->in.sg);
- scatterwalk_start(&walk->out, walk->out.sg);
-
- return ablkcipher_walk_next(req, walk);
-}
-
-int ablkcipher_walk_phys(struct ablkcipher_request *req,
- struct ablkcipher_walk *walk)
-{
- walk->blocksize = crypto_tfm_alg_blocksize(req->base.tfm);
- return ablkcipher_walk_first(req, walk);
-}
-EXPORT_SYMBOL_GPL(ablkcipher_walk_phys);
-
-static int setkey_unaligned(struct crypto_ablkcipher *tfm, const u8 *key,
- unsigned int keylen)
-{
- struct ablkcipher_alg *cipher = crypto_ablkcipher_alg(tfm);
- unsigned long alignmask = crypto_ablkcipher_alignmask(tfm);
- int ret;
- u8 *buffer, *alignbuffer;
- unsigned long absize;
-
- absize = keylen + alignmask;
- buffer = kmalloc(absize, GFP_ATOMIC);
- if (!buffer)
- return -ENOMEM;
-
- alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
- memcpy(alignbuffer, key, keylen);
- ret = cipher->setkey(tfm, alignbuffer, keylen);
- memset(alignbuffer, 0, keylen);
- kfree(buffer);
- return ret;
-}
-
-static int setkey(struct crypto_ablkcipher *tfm, const u8 *key,
- unsigned int keylen)
-{
- struct ablkcipher_alg *cipher = crypto_ablkcipher_alg(tfm);
- unsigned long alignmask = crypto_ablkcipher_alignmask(tfm);
-
- if (keylen < cipher->min_keysize || keylen > cipher->max_keysize) {
- crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
- return -EINVAL;
- }
-
- if ((unsigned long)key & alignmask)
- return setkey_unaligned(tfm, key, keylen);
-
- return cipher->setkey(tfm, key, keylen);
-}
-
-static unsigned int crypto_ablkcipher_ctxsize(struct crypto_alg *alg, u32 type,
- u32 mask)
-{
- return alg->cra_ctxsize;
-}
-
-static int crypto_init_ablkcipher_ops(struct crypto_tfm *tfm, u32 type,
- u32 mask)
-{
- struct ablkcipher_alg *alg = &tfm->__crt_alg->cra_ablkcipher;
- struct ablkcipher_tfm *crt = &tfm->crt_ablkcipher;
-
- if (alg->ivsize > PAGE_SIZE / 8)
- return -EINVAL;
-
- crt->setkey = setkey;
- crt->encrypt = alg->encrypt;
- crt->decrypt = alg->decrypt;
- crt->base = __crypto_ablkcipher_cast(tfm);
- crt->ivsize = alg->ivsize;
-
- return 0;
-}
-
-#ifdef CONFIG_NET
-static int crypto_ablkcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
-{
- struct crypto_report_blkcipher rblkcipher;
-
- memset(&rblkcipher, 0, sizeof(rblkcipher));
-
- strscpy(rblkcipher.type, "ablkcipher", sizeof(rblkcipher.type));
- strscpy(rblkcipher.geniv, "<default>", sizeof(rblkcipher.geniv));
-
- rblkcipher.blocksize = alg->cra_blocksize;
- rblkcipher.min_keysize = alg->cra_ablkcipher.min_keysize;
- rblkcipher.max_keysize = alg->cra_ablkcipher.max_keysize;
- rblkcipher.ivsize = alg->cra_ablkcipher.ivsize;
-
- return nla_put(skb, CRYPTOCFGA_REPORT_BLKCIPHER,
- sizeof(rblkcipher), &rblkcipher);
-}
-#else
-static int crypto_ablkcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
-{
- return -ENOSYS;
-}
-#endif
-
-static void crypto_ablkcipher_show(struct seq_file *m, struct crypto_alg *alg)
- __maybe_unused;
-static void crypto_ablkcipher_show(struct seq_file *m, struct crypto_alg *alg)
-{
- struct ablkcipher_alg *ablkcipher = &alg->cra_ablkcipher;
-
- seq_printf(m, "type : ablkcipher\n");
- seq_printf(m, "async : %s\n", alg->cra_flags & CRYPTO_ALG_ASYNC ?
- "yes" : "no");
- seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
- seq_printf(m, "min keysize : %u\n", ablkcipher->min_keysize);
- seq_printf(m, "max keysize : %u\n", ablkcipher->max_keysize);
- seq_printf(m, "ivsize : %u\n", ablkcipher->ivsize);
- seq_printf(m, "geniv : <default>\n");
-}
-
-const struct crypto_type crypto_ablkcipher_type = {
- .ctxsize = crypto_ablkcipher_ctxsize,
- .init = crypto_init_ablkcipher_ops,
-#ifdef CONFIG_PROC_FS
- .show = crypto_ablkcipher_show,
-#endif
- .report = crypto_ablkcipher_report,
-};
-EXPORT_SYMBOL_GPL(crypto_ablkcipher_type);