:doc: Block Cipher Algorithm Definitions
.. kernel-doc:: include/linux/crypto.h
- :functions: crypto_alg ablkcipher_alg cipher_alg compress_alg
+ :functions: crypto_alg cipher_alg compress_alg
Symmetric Key Cipher API
------------------------
.. kernel-doc:: include/linux/crypto.h
:functions: crypto_alloc_cipher crypto_free_cipher crypto_has_cipher crypto_cipher_blocksize crypto_cipher_setkey crypto_cipher_encrypt_one crypto_cipher_decrypt_one
-
-Asynchronous Block Cipher API - Deprecated
-------------------------------------------
-
-.. kernel-doc:: include/linux/crypto.h
- :doc: Asynchronous Block Cipher API
-
-.. kernel-doc:: include/linux/crypto.h
- :functions: crypto_free_ablkcipher crypto_ablkcipher_ivsize crypto_ablkcipher_blocksize crypto_ablkcipher_setkey crypto_ablkcipher_reqtfm crypto_ablkcipher_encrypt crypto_ablkcipher_decrypt
-
-Asynchronous Cipher Request Handle - Deprecated
------------------------------------------------
-
-.. kernel-doc:: include/linux/crypto.h
- :doc: Asynchronous Cipher Request Handle
-
-.. kernel-doc:: include/linux/crypto.h
- :functions: crypto_ablkcipher_reqsize ablkcipher_request_set_tfm ablkcipher_request_alloc ablkcipher_request_free ablkcipher_request_set_callback ablkcipher_request_set_crypt
- CRYPTO_ALG_TYPE_AEAD Authenticated Encryption with Associated Data
(MAC)
-- CRYPTO_ALG_TYPE_ABLKCIPHER Asynchronous multi-block cipher
-
- CRYPTO_ALG_TYPE_KPP Key-agreement Protocol Primitive (KPP) such as
an ECDH or DH implementation
When your driver receives a crypto_request, you must to transfer it to
the crypto engine via one of:
-* crypto_transfer_ablkcipher_request_to_engine()
-
* crypto_transfer_aead_request_to_engine()
* crypto_transfer_akcipher_request_to_engine()
At the end of the request process, a call to one of the following functions is needed:
-* crypto_finalize_ablkcipher_request()
-
* crypto_finalize_aead_request()
* crypto_finalize_akcipher_request()
obj-$(CONFIG_CRYPTO_AEAD2) += aead.o
obj-$(CONFIG_CRYPTO_AEAD2) += geniv.o
-crypto_skcipher-y := ablkcipher.o
-crypto_skcipher-y += skcipher.o
-obj-$(CONFIG_CRYPTO_SKCIPHER2) += crypto_skcipher.o
+obj-$(CONFIG_CRYPTO_SKCIPHER2) += skcipher.o
obj-$(CONFIG_CRYPTO_SEQIV) += seqiv.o
obj-$(CONFIG_CRYPTO_ECHAINIV) += echainiv.o
+++ /dev/null
-// 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);
}
EXPORT_SYMBOL_GPL(crypto_stats_get);
-void crypto_stats_ablkcipher_encrypt(unsigned int nbytes, int ret,
- struct crypto_alg *alg)
-{
- if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
- atomic64_inc(&alg->stats.cipher.err_cnt);
- } else {
- atomic64_inc(&alg->stats.cipher.encrypt_cnt);
- atomic64_add(nbytes, &alg->stats.cipher.encrypt_tlen);
- }
- crypto_alg_put(alg);
-}
-EXPORT_SYMBOL_GPL(crypto_stats_ablkcipher_encrypt);
-
-void crypto_stats_ablkcipher_decrypt(unsigned int nbytes, int ret,
- struct crypto_alg *alg)
-{
- if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
- atomic64_inc(&alg->stats.cipher.err_cnt);
- } else {
- atomic64_inc(&alg->stats.cipher.decrypt_cnt);
- atomic64_add(nbytes, &alg->stats.cipher.decrypt_tlen);
- }
- crypto_alg_put(alg);
-}
-EXPORT_SYMBOL_GPL(crypto_stats_ablkcipher_decrypt);
-
void crypto_stats_aead_encrypt(unsigned int cryptlen, struct crypto_alg *alg,
int ret)
{
return crypto_transfer_request(engine, req, true);
}
-/**
- * crypto_transfer_ablkcipher_request_to_engine - transfer one ablkcipher_request
- * to list into the engine queue
- * @engine: the hardware engine
- * @req: the request need to be listed into the engine queue
- * TODO: Remove this function when skcipher conversion is finished
- */
-int crypto_transfer_ablkcipher_request_to_engine(struct crypto_engine *engine,
- struct ablkcipher_request *req)
-{
- return crypto_transfer_request_to_engine(engine, &req->base);
-}
-EXPORT_SYMBOL_GPL(crypto_transfer_ablkcipher_request_to_engine);
-
/**
* crypto_transfer_aead_request_to_engine - transfer one aead_request
* to list into the engine queue
}
EXPORT_SYMBOL_GPL(crypto_transfer_skcipher_request_to_engine);
-/**
- * crypto_finalize_ablkcipher_request - finalize one ablkcipher_request if
- * the request is done
- * @engine: the hardware engine
- * @req: the request need to be finalized
- * @err: error number
- * TODO: Remove this function when skcipher conversion is finished
- */
-void crypto_finalize_ablkcipher_request(struct crypto_engine *engine,
- struct ablkcipher_request *req, int err)
-{
- return crypto_finalize_request(engine, &req->base, err);
-}
-EXPORT_SYMBOL_GPL(crypto_finalize_ablkcipher_request);
-
/**
* crypto_finalize_aead_request - finalize one aead_request if
* the request is done
static unsigned int crypto_skcipher_extsize(struct crypto_alg *alg)
{
- if (alg->cra_type == &crypto_ablkcipher_type)
- return sizeof(struct crypto_ablkcipher *);
-
return crypto_alg_extsize(alg);
}
crypto_skcipher_set_flags(tfm, CRYPTO_TFM_NEED_KEY);
}
-static int skcipher_setkey_ablkcipher(struct crypto_skcipher *tfm,
- const u8 *key, unsigned int keylen)
-{
- struct crypto_ablkcipher **ctx = crypto_skcipher_ctx(tfm);
- struct crypto_ablkcipher *ablkcipher = *ctx;
- int err;
-
- crypto_ablkcipher_clear_flags(ablkcipher, ~0);
- crypto_ablkcipher_set_flags(ablkcipher,
- crypto_skcipher_get_flags(tfm) &
- CRYPTO_TFM_REQ_MASK);
- err = crypto_ablkcipher_setkey(ablkcipher, key, keylen);
- crypto_skcipher_set_flags(tfm,
- crypto_ablkcipher_get_flags(ablkcipher) &
- CRYPTO_TFM_RES_MASK);
- if (unlikely(err)) {
- skcipher_set_needkey(tfm);
- return err;
- }
-
- crypto_skcipher_clear_flags(tfm, CRYPTO_TFM_NEED_KEY);
- return 0;
-}
-
-static int skcipher_crypt_ablkcipher(struct skcipher_request *req,
- int (*crypt)(struct ablkcipher_request *))
-{
- struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
- struct crypto_ablkcipher **ctx = crypto_skcipher_ctx(tfm);
- struct ablkcipher_request *subreq = skcipher_request_ctx(req);
-
- ablkcipher_request_set_tfm(subreq, *ctx);
- ablkcipher_request_set_callback(subreq, skcipher_request_flags(req),
- req->base.complete, req->base.data);
- ablkcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
- req->iv);
-
- return crypt(subreq);
-}
-
-static int skcipher_encrypt_ablkcipher(struct skcipher_request *req)
-{
- struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
- struct crypto_tfm *tfm = crypto_skcipher_tfm(skcipher);
- struct ablkcipher_alg *alg = &tfm->__crt_alg->cra_ablkcipher;
-
- return skcipher_crypt_ablkcipher(req, alg->encrypt);
-}
-
-static int skcipher_decrypt_ablkcipher(struct skcipher_request *req)
-{
- struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
- struct crypto_tfm *tfm = crypto_skcipher_tfm(skcipher);
- struct ablkcipher_alg *alg = &tfm->__crt_alg->cra_ablkcipher;
-
- return skcipher_crypt_ablkcipher(req, alg->decrypt);
-}
-
-static void crypto_exit_skcipher_ops_ablkcipher(struct crypto_tfm *tfm)
-{
- struct crypto_ablkcipher **ctx = crypto_tfm_ctx(tfm);
-
- crypto_free_ablkcipher(*ctx);
-}
-
-static int crypto_init_skcipher_ops_ablkcipher(struct crypto_tfm *tfm)
-{
- struct crypto_alg *calg = tfm->__crt_alg;
- struct crypto_skcipher *skcipher = __crypto_skcipher_cast(tfm);
- struct crypto_ablkcipher **ctx = crypto_tfm_ctx(tfm);
- struct crypto_ablkcipher *ablkcipher;
- struct crypto_tfm *abtfm;
-
- if (!crypto_mod_get(calg))
- return -EAGAIN;
-
- abtfm = __crypto_alloc_tfm(calg, 0, 0);
- if (IS_ERR(abtfm)) {
- crypto_mod_put(calg);
- return PTR_ERR(abtfm);
- }
-
- ablkcipher = __crypto_ablkcipher_cast(abtfm);
- *ctx = ablkcipher;
- tfm->exit = crypto_exit_skcipher_ops_ablkcipher;
-
- skcipher->setkey = skcipher_setkey_ablkcipher;
- skcipher->encrypt = skcipher_encrypt_ablkcipher;
- skcipher->decrypt = skcipher_decrypt_ablkcipher;
-
- skcipher->ivsize = crypto_ablkcipher_ivsize(ablkcipher);
- skcipher->reqsize = crypto_ablkcipher_reqsize(ablkcipher) +
- sizeof(struct ablkcipher_request);
- skcipher->keysize = calg->cra_ablkcipher.max_keysize;
-
- skcipher_set_needkey(skcipher);
-
- return 0;
-}
-
static int skcipher_setkey_unaligned(struct crypto_skcipher *tfm,
const u8 *key, unsigned int keylen)
{
struct crypto_skcipher *skcipher = __crypto_skcipher_cast(tfm);
struct skcipher_alg *alg = crypto_skcipher_alg(skcipher);
- if (tfm->__crt_alg->cra_type == &crypto_ablkcipher_type)
- return crypto_init_skcipher_ops_ablkcipher(tfm);
-
skcipher->setkey = skcipher_setkey;
skcipher->encrypt = alg->encrypt;
skcipher->decrypt = alg->decrypt;
/**
* crypto_aead_decrypt() - decrypt ciphertext
- * @req: reference to the ablkcipher_request handle that holds all information
+ * @req: reference to the aead_request handle that holds all information
* needed to perform the cipher operation
*
* Decrypt ciphertext data using the aead_request handle. That data structure
unsigned int offset;
};
-struct ablkcipher_walk {
- struct {
- struct page *page;
- unsigned int offset;
- } src, dst;
-
- struct scatter_walk in;
- unsigned int nbytes;
- struct scatter_walk out;
- unsigned int total;
- struct list_head buffers;
- u8 *iv_buffer;
- u8 *iv;
- int flags;
- unsigned int blocksize;
-};
-
-extern const struct crypto_type crypto_ablkcipher_type;
-
void crypto_mod_put(struct crypto_alg *alg);
int crypto_register_template(struct crypto_template *tmpl);
}
}
-int ablkcipher_walk_done(struct ablkcipher_request *req,
- struct ablkcipher_walk *walk, int err);
-int ablkcipher_walk_phys(struct ablkcipher_request *req,
- struct ablkcipher_walk *walk);
-void __ablkcipher_walk_complete(struct ablkcipher_walk *walk);
-
static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm)
{
return PTR_ALIGN(crypto_tfm_ctx(tfm),
return inst->__ctx;
}
-static inline struct ablkcipher_alg *crypto_ablkcipher_alg(
- struct crypto_ablkcipher *tfm)
-{
- return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher;
-}
-
-static inline void *crypto_ablkcipher_ctx(struct crypto_ablkcipher *tfm)
-{
- return crypto_tfm_ctx(&tfm->base);
-}
-
-static inline void *crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher *tfm)
-{
- return crypto_tfm_ctx_aligned(&tfm->base);
-}
-
static inline struct crypto_cipher *crypto_spawn_cipher(
struct crypto_spawn *spawn)
{
return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher;
}
-static inline void ablkcipher_walk_init(struct ablkcipher_walk *walk,
- struct scatterlist *dst,
- struct scatterlist *src,
- unsigned int nbytes)
-{
- walk->in.sg = src;
- walk->out.sg = dst;
- walk->total = nbytes;
- INIT_LIST_HEAD(&walk->buffers);
-}
-
-static inline void ablkcipher_walk_complete(struct ablkcipher_walk *walk)
-{
- if (unlikely(!list_empty(&walk->buffers)))
- __ablkcipher_walk_complete(walk);
-}
-
static inline struct crypto_async_request *crypto_get_backlog(
struct crypto_queue *queue)
{
container_of(queue->backlog, struct crypto_async_request, list);
}
-static inline int ablkcipher_enqueue_request(struct crypto_queue *queue,
- struct ablkcipher_request *request)
-{
- return crypto_enqueue_request(queue, &request->base);
-}
-
-static inline struct ablkcipher_request *ablkcipher_dequeue_request(
- struct crypto_queue *queue)
-{
- return ablkcipher_request_cast(crypto_dequeue_request(queue));
-}
-
-static inline void *ablkcipher_request_ctx(struct ablkcipher_request *req)
-{
- return req->__ctx;
-}
-
static inline struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb,
u32 type, u32 mask)
{
struct crypto_engine_op op;
};
-int crypto_transfer_ablkcipher_request_to_engine(struct crypto_engine *engine,
- struct ablkcipher_request *req);
int crypto_transfer_aead_request_to_engine(struct crypto_engine *engine,
struct aead_request *req);
int crypto_transfer_akcipher_request_to_engine(struct crypto_engine *engine,
struct ahash_request *req);
int crypto_transfer_skcipher_request_to_engine(struct crypto_engine *engine,
struct skcipher_request *req);
-void crypto_finalize_ablkcipher_request(struct crypto_engine *engine,
- struct ablkcipher_request *req, int err);
void crypto_finalize_aead_request(struct crypto_engine *engine,
struct aead_request *req, int err);
void crypto_finalize_akcipher_request(struct crypto_engine *engine,
* CRYPTO_ALG_TYPE_AHASH (listed as type "ahash" in /proc/crypto)
*
* The asynchronous cipher operation discussion provided for the
- * CRYPTO_ALG_TYPE_ABLKCIPHER API applies here as well.
+ * CRYPTO_ALG_TYPE_SKCIPHER API applies here as well.
*/
static inline struct crypto_ahash *__crypto_ahash_cast(struct crypto_tfm *tfm)
return crypto_des3_ede_verify_key(crypto_skcipher_tfm(tfm), key);
}
-static inline int verify_ablkcipher_des_key(struct crypto_ablkcipher *tfm,
- const u8 *key)
-{
- return crypto_des_verify_key(crypto_ablkcipher_tfm(tfm), key);
-}
-
-static inline int verify_ablkcipher_des3_key(struct crypto_ablkcipher *tfm,
- const u8 *key)
-{
- return crypto_des3_ede_verify_key(crypto_ablkcipher_tfm(tfm), key);
-}
-
static inline int verify_aead_des_key(struct crypto_aead *tfm, const u8 *key,
int keylen)
{
skcipher_walk_done(walk, -ECANCELED);
}
-static inline void ablkcipher_request_complete(struct ablkcipher_request *req,
- int err)
-{
- req->base.complete(&req->base, err);
-}
-
-static inline u32 ablkcipher_request_flags(struct ablkcipher_request *req)
-{
- return req->base.flags;
-}
-
static inline void *crypto_skcipher_ctx(struct crypto_skcipher *tfm)
{
return crypto_tfm_ctx(&tfm->base);
static inline unsigned int crypto_skcipher_alg_min_keysize(
struct skcipher_alg *alg)
{
- if (alg->base.cra_ablkcipher.encrypt)
- return alg->base.cra_ablkcipher.min_keysize;
-
return alg->min_keysize;
}
static inline unsigned int crypto_skcipher_alg_max_keysize(
struct skcipher_alg *alg)
{
- if (alg->base.cra_ablkcipher.encrypt)
- return alg->base.cra_ablkcipher.max_keysize;
-
return alg->max_keysize;
}
static inline unsigned int crypto_skcipher_alg_walksize(
struct skcipher_alg *alg)
{
- if (alg->base.cra_ablkcipher.encrypt)
- return alg->base.cra_blocksize;
-
return alg->walksize;
}
static inline unsigned int crypto_skcipher_alg_ivsize(struct skcipher_alg *alg)
{
- if (alg->base.cra_ablkcipher.encrypt)
- return alg->base.cra_ablkcipher.ivsize;
-
return alg->ivsize;
}
static inline unsigned int crypto_skcipher_alg_chunksize(
struct skcipher_alg *alg)
{
- if (alg->base.cra_ablkcipher.encrypt)
- return alg->base.cra_blocksize;
-
return alg->chunksize;
}
#define CRYPTO_ALG_TYPE_CIPHER 0x00000001
#define CRYPTO_ALG_TYPE_COMPRESS 0x00000002
#define CRYPTO_ALG_TYPE_AEAD 0x00000003
-#define CRYPTO_ALG_TYPE_ABLKCIPHER 0x00000005
#define CRYPTO_ALG_TYPE_SKCIPHER 0x00000005
#define CRYPTO_ALG_TYPE_KPP 0x00000008
#define CRYPTO_ALG_TYPE_ACOMPRESS 0x0000000a
#define CRYPTO_MINALIGN_ATTR __attribute__ ((__aligned__(CRYPTO_MINALIGN)))
struct scatterlist;
-struct crypto_ablkcipher;
struct crypto_async_request;
struct crypto_tfm;
struct crypto_type;
u32 flags;
};
-struct ablkcipher_request {
- struct crypto_async_request base;
-
- unsigned int nbytes;
-
- void *info;
-
- struct scatterlist *src;
- struct scatterlist *dst;
-
- void *__ctx[] CRYPTO_MINALIGN_ATTR;
-};
-
/**
* DOC: Block Cipher Algorithm Definitions
*
* managed via crypto_register_alg() and crypto_unregister_alg().
*/
-/**
- * struct ablkcipher_alg - asynchronous block cipher definition
- * @min_keysize: Minimum key size supported by the transformation. This is the
- * smallest key length supported by this transformation algorithm.
- * This must be set to one of the pre-defined values as this is
- * not hardware specific. Possible values for this field can be
- * found via git grep "_MIN_KEY_SIZE" include/crypto/
- * @max_keysize: Maximum key size supported by the transformation. This is the
- * largest key length supported by this transformation algorithm.
- * This must be set to one of the pre-defined values as this is
- * not hardware specific. Possible values for this field can be
- * found via git grep "_MAX_KEY_SIZE" include/crypto/
- * @setkey: Set key for the transformation. This function is used to either
- * program a supplied key into the hardware or store the key in the
- * transformation context for programming it later. Note that this
- * function does modify the transformation context. This function can
- * be called multiple times during the existence of the transformation
- * object, so one must make sure the key is properly reprogrammed into
- * the hardware. This function is also responsible for checking the key
- * length for validity. In case a software fallback was put in place in
- * the @cra_init call, this function might need to use the fallback if
- * the algorithm doesn't support all of the key sizes.
- * @encrypt: Encrypt a scatterlist of blocks. This function is used to encrypt
- * the supplied scatterlist containing the blocks of data. The crypto
- * API consumer is responsible for aligning the entries of the
- * scatterlist properly and making sure the chunks are correctly
- * sized. In case a software fallback was put in place in the
- * @cra_init call, this function might need to use the fallback if
- * the algorithm doesn't support all of the key sizes. In case the
- * key was stored in transformation context, the key might need to be
- * re-programmed into the hardware in this function. This function
- * shall not modify the transformation context, as this function may
- * be called in parallel with the same transformation object.
- * @decrypt: Decrypt a single block. This is a reverse counterpart to @encrypt
- * and the conditions are exactly the same.
- * @ivsize: IV size applicable for transformation. The consumer must provide an
- * IV of exactly that size to perform the encrypt or decrypt operation.
- *
- * All fields except @ivsize are mandatory and must be filled.
- */
-struct ablkcipher_alg {
- int (*setkey)(struct crypto_ablkcipher *tfm, const u8 *key,
- unsigned int keylen);
- int (*encrypt)(struct ablkcipher_request *req);
- int (*decrypt)(struct ablkcipher_request *req);
-
- unsigned int min_keysize;
- unsigned int max_keysize;
- unsigned int ivsize;
-};
-
/**
* struct cipher_alg - single-block symmetric ciphers definition
* @cia_min_keysize: Minimum key size supported by the transformation. This is
};
#endif /* CONFIG_CRYPTO_STATS */
-#define cra_ablkcipher cra_u.ablkcipher
#define cra_cipher cra_u.cipher
#define cra_compress cra_u.compress
* @cra_exit: Deinitialize the cryptographic transformation object. This is a
* counterpart to @cra_init, used to remove various changes set in
* @cra_init.
- * @cra_u.ablkcipher: Union member which contains an asynchronous block cipher
- * definition. See @struct @ablkcipher_alg.
* @cra_u.cipher: Union member which contains a single-block symmetric cipher
* definition. See @struct @cipher_alg.
* @cra_u.compress: Union member which contains a (de)compression algorithm.
const struct crypto_type *cra_type;
union {
- struct ablkcipher_alg ablkcipher;
struct cipher_alg cipher;
struct compress_alg compress;
} cra_u;
#ifdef CONFIG_CRYPTO_STATS
void crypto_stats_init(struct crypto_alg *alg);
void crypto_stats_get(struct crypto_alg *alg);
-void crypto_stats_ablkcipher_encrypt(unsigned int nbytes, int ret, struct crypto_alg *alg);
-void crypto_stats_ablkcipher_decrypt(unsigned int nbytes, int ret, struct crypto_alg *alg);
void crypto_stats_aead_encrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret);
void crypto_stats_aead_decrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret);
void crypto_stats_ahash_update(unsigned int nbytes, int ret, struct crypto_alg *alg);
{}
static inline void crypto_stats_get(struct crypto_alg *alg)
{}
-static inline void crypto_stats_ablkcipher_encrypt(unsigned int nbytes, int ret, struct crypto_alg *alg)
-{}
-static inline void crypto_stats_ablkcipher_decrypt(unsigned int nbytes, int ret, struct crypto_alg *alg)
-{}
static inline void crypto_stats_aead_encrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret)
{}
static inline void crypto_stats_aead_decrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret)
* crypto_free_*(), as well as the various helpers below.
*/
-struct ablkcipher_tfm {
- int (*setkey)(struct crypto_ablkcipher *tfm, const u8 *key,
- unsigned int keylen);
- int (*encrypt)(struct ablkcipher_request *req);
- int (*decrypt)(struct ablkcipher_request *req);
-
- struct crypto_ablkcipher *base;
-
- unsigned int ivsize;
- unsigned int reqsize;
-};
-
struct cipher_tfm {
int (*cit_setkey)(struct crypto_tfm *tfm,
const u8 *key, unsigned int keylen);
u8 *dst, unsigned int *dlen);
};
-#define crt_ablkcipher crt_u.ablkcipher
#define crt_cipher crt_u.cipher
#define crt_compress crt_u.compress
u32 crt_flags;
union {
- struct ablkcipher_tfm ablkcipher;
struct cipher_tfm cipher;
struct compress_tfm compress;
} crt_u;
void *__crt_ctx[] CRYPTO_MINALIGN_ATTR;
};
-struct crypto_ablkcipher {
- struct crypto_tfm base;
-};
-
struct crypto_cipher {
struct crypto_tfm base;
};
return __alignof__(tfm->__crt_ctx);
}
-/*
- * API wrappers.
- */
-static inline struct crypto_ablkcipher *__crypto_ablkcipher_cast(
- struct crypto_tfm *tfm)
-{
- return (struct crypto_ablkcipher *)tfm;
-}
-
-/**
- * DOC: Asynchronous Block Cipher API
- *
- * Asynchronous block cipher API is used with the ciphers of type
- * CRYPTO_ALG_TYPE_ABLKCIPHER (listed as type "ablkcipher" in /proc/crypto).
- *
- * Asynchronous cipher operations imply that the function invocation for a
- * cipher request returns immediately before the completion of the operation.
- * The cipher request is scheduled as a separate kernel thread and therefore
- * load-balanced on the different CPUs via the process scheduler. To allow
- * the kernel crypto API to inform the caller about the completion of a cipher
- * request, the caller must provide a callback function. That function is
- * invoked with the cipher handle when the request completes.
- *
- * To support the asynchronous operation, additional information than just the
- * cipher handle must be supplied to the kernel crypto API. That additional
- * information is given by filling in the ablkcipher_request data structure.
- *
- * For the asynchronous block cipher API, the state is maintained with the tfm
- * cipher handle. A single tfm can be used across multiple calls and in
- * parallel. For asynchronous block cipher calls, context data supplied and
- * only used by the caller can be referenced the request data structure in
- * addition to the IV used for the cipher request. The maintenance of such
- * state information would be important for a crypto driver implementer to
- * have, because when calling the callback function upon completion of the
- * cipher operation, that callback function may need some information about
- * which operation just finished if it invoked multiple in parallel. This
- * state information is unused by the kernel crypto API.
- */
-
-static inline struct crypto_tfm *crypto_ablkcipher_tfm(
- struct crypto_ablkcipher *tfm)
-{
- return &tfm->base;
-}
-
-/**
- * crypto_free_ablkcipher() - zeroize and free cipher handle
- * @tfm: cipher handle to be freed
- */
-static inline void crypto_free_ablkcipher(struct crypto_ablkcipher *tfm)
-{
- crypto_free_tfm(crypto_ablkcipher_tfm(tfm));
-}
-
-static inline struct ablkcipher_tfm *crypto_ablkcipher_crt(
- struct crypto_ablkcipher *tfm)
-{
- return &crypto_ablkcipher_tfm(tfm)->crt_ablkcipher;
-}
-
-/**
- * crypto_ablkcipher_ivsize() - obtain IV size
- * @tfm: cipher handle
- *
- * The size of the IV for the ablkcipher referenced by the cipher handle is
- * returned. This IV size may be zero if the cipher does not need an IV.
- *
- * Return: IV size in bytes
- */
-static inline unsigned int crypto_ablkcipher_ivsize(
- struct crypto_ablkcipher *tfm)
-{
- return crypto_ablkcipher_crt(tfm)->ivsize;
-}
-
-/**
- * crypto_ablkcipher_blocksize() - obtain block size of cipher
- * @tfm: cipher handle
- *
- * The block size for the ablkcipher referenced with the cipher handle is
- * returned. The caller may use that information to allocate appropriate
- * memory for the data returned by the encryption or decryption operation
- *
- * Return: block size of cipher
- */
-static inline unsigned int crypto_ablkcipher_blocksize(
- struct crypto_ablkcipher *tfm)
-{
- return crypto_tfm_alg_blocksize(crypto_ablkcipher_tfm(tfm));
-}
-
-static inline unsigned int crypto_ablkcipher_alignmask(
- struct crypto_ablkcipher *tfm)
-{
- return crypto_tfm_alg_alignmask(crypto_ablkcipher_tfm(tfm));
-}
-
-static inline u32 crypto_ablkcipher_get_flags(struct crypto_ablkcipher *tfm)
-{
- return crypto_tfm_get_flags(crypto_ablkcipher_tfm(tfm));
-}
-
-static inline void crypto_ablkcipher_set_flags(struct crypto_ablkcipher *tfm,
- u32 flags)
-{
- crypto_tfm_set_flags(crypto_ablkcipher_tfm(tfm), flags);
-}
-
-static inline void crypto_ablkcipher_clear_flags(struct crypto_ablkcipher *tfm,
- u32 flags)
-{
- crypto_tfm_clear_flags(crypto_ablkcipher_tfm(tfm), flags);
-}
-
-/**
- * crypto_ablkcipher_setkey() - set key for cipher
- * @tfm: cipher handle
- * @key: buffer holding the key
- * @keylen: length of the key in bytes
- *
- * The caller provided key is set for the ablkcipher referenced by the cipher
- * handle.
- *
- * Note, the key length determines the cipher type. Many block ciphers implement
- * different cipher modes depending on the key size, such as AES-128 vs AES-192
- * vs. AES-256. When providing a 16 byte key for an AES cipher handle, AES-128
- * is performed.
- *
- * Return: 0 if the setting of the key was successful; < 0 if an error occurred
- */
-static inline int crypto_ablkcipher_setkey(struct crypto_ablkcipher *tfm,
- const u8 *key, unsigned int keylen)
-{
- struct ablkcipher_tfm *crt = crypto_ablkcipher_crt(tfm);
-
- return crt->setkey(crt->base, key, keylen);
-}
-
-/**
- * crypto_ablkcipher_reqtfm() - obtain cipher handle from request
- * @req: ablkcipher_request out of which the cipher handle is to be obtained
- *
- * Return the crypto_ablkcipher handle when furnishing an ablkcipher_request
- * data structure.
- *
- * Return: crypto_ablkcipher handle
- */
-static inline struct crypto_ablkcipher *crypto_ablkcipher_reqtfm(
- struct ablkcipher_request *req)
-{
- return __crypto_ablkcipher_cast(req->base.tfm);
-}
-
-/**
- * crypto_ablkcipher_encrypt() - encrypt plaintext
- * @req: reference to the ablkcipher_request handle that holds all information
- * needed to perform the cipher operation
- *
- * Encrypt plaintext data using the ablkcipher_request handle. That data
- * structure and how it is filled with data is discussed with the
- * ablkcipher_request_* functions.
- *
- * Return: 0 if the cipher operation was successful; < 0 if an error occurred
- */
-static inline int crypto_ablkcipher_encrypt(struct ablkcipher_request *req)
-{
- struct ablkcipher_tfm *crt =
- crypto_ablkcipher_crt(crypto_ablkcipher_reqtfm(req));
- struct crypto_alg *alg = crt->base->base.__crt_alg;
- unsigned int nbytes = req->nbytes;
- int ret;
-
- crypto_stats_get(alg);
- ret = crt->encrypt(req);
- crypto_stats_ablkcipher_encrypt(nbytes, ret, alg);
- return ret;
-}
-
-/**
- * crypto_ablkcipher_decrypt() - decrypt ciphertext
- * @req: reference to the ablkcipher_request handle that holds all information
- * needed to perform the cipher operation
- *
- * Decrypt ciphertext data using the ablkcipher_request handle. That data
- * structure and how it is filled with data is discussed with the
- * ablkcipher_request_* functions.
- *
- * Return: 0 if the cipher operation was successful; < 0 if an error occurred
- */
-static inline int crypto_ablkcipher_decrypt(struct ablkcipher_request *req)
-{
- struct ablkcipher_tfm *crt =
- crypto_ablkcipher_crt(crypto_ablkcipher_reqtfm(req));
- struct crypto_alg *alg = crt->base->base.__crt_alg;
- unsigned int nbytes = req->nbytes;
- int ret;
-
- crypto_stats_get(alg);
- ret = crt->decrypt(req);
- crypto_stats_ablkcipher_decrypt(nbytes, ret, alg);
- return ret;
-}
-
-/**
- * DOC: Asynchronous Cipher Request Handle
- *
- * The ablkcipher_request data structure contains all pointers to data
- * required for the asynchronous cipher operation. This includes the cipher
- * handle (which can be used by multiple ablkcipher_request instances), pointer
- * to plaintext and ciphertext, asynchronous callback function, etc. It acts
- * as a handle to the ablkcipher_request_* API calls in a similar way as
- * ablkcipher handle to the crypto_ablkcipher_* API calls.
- */
-
-/**
- * crypto_ablkcipher_reqsize() - obtain size of the request data structure
- * @tfm: cipher handle
- *
- * Return: number of bytes
- */
-static inline unsigned int crypto_ablkcipher_reqsize(
- struct crypto_ablkcipher *tfm)
-{
- return crypto_ablkcipher_crt(tfm)->reqsize;
-}
-
-/**
- * ablkcipher_request_set_tfm() - update cipher handle reference in request
- * @req: request handle to be modified
- * @tfm: cipher handle that shall be added to the request handle
- *
- * Allow the caller to replace the existing ablkcipher handle in the request
- * data structure with a different one.
- */
-static inline void ablkcipher_request_set_tfm(
- struct ablkcipher_request *req, struct crypto_ablkcipher *tfm)
-{
- req->base.tfm = crypto_ablkcipher_tfm(crypto_ablkcipher_crt(tfm)->base);
-}
-
-static inline struct ablkcipher_request *ablkcipher_request_cast(
- struct crypto_async_request *req)
-{
- return container_of(req, struct ablkcipher_request, base);
-}
-
-/**
- * ablkcipher_request_alloc() - allocate request data structure
- * @tfm: cipher handle to be registered with the request
- * @gfp: memory allocation flag that is handed to kmalloc by the API call.
- *
- * Allocate the request data structure that must be used with the ablkcipher
- * encrypt and decrypt API calls. During the allocation, the provided ablkcipher
- * handle is registered in the request data structure.
- *
- * Return: allocated request handle in case of success, or NULL if out of memory
- */
-static inline struct ablkcipher_request *ablkcipher_request_alloc(
- struct crypto_ablkcipher *tfm, gfp_t gfp)
-{
- struct ablkcipher_request *req;
-
- req = kmalloc(sizeof(struct ablkcipher_request) +
- crypto_ablkcipher_reqsize(tfm), gfp);
-
- if (likely(req))
- ablkcipher_request_set_tfm(req, tfm);
-
- return req;
-}
-
-/**
- * ablkcipher_request_free() - zeroize and free request data structure
- * @req: request data structure cipher handle to be freed
- */
-static inline void ablkcipher_request_free(struct ablkcipher_request *req)
-{
- kzfree(req);
-}
-
-/**
- * ablkcipher_request_set_callback() - set asynchronous callback function
- * @req: request handle
- * @flags: specify zero or an ORing of the flags
- * CRYPTO_TFM_REQ_MAY_BACKLOG the request queue may back log and
- * increase the wait queue beyond the initial maximum size;
- * CRYPTO_TFM_REQ_MAY_SLEEP the request processing may sleep
- * @compl: callback function pointer to be registered with the request handle
- * @data: The data pointer refers to memory that is not used by the kernel
- * crypto API, but provided to the callback function for it to use. Here,
- * the caller can provide a reference to memory the callback function can
- * operate on. As the callback function is invoked asynchronously to the
- * related functionality, it may need to access data structures of the
- * related functionality which can be referenced using this pointer. The
- * callback function can access the memory via the "data" field in the
- * crypto_async_request data structure provided to the callback function.
- *
- * This function allows setting the callback function that is triggered once the
- * cipher operation completes.
- *
- * The callback function is registered with the ablkcipher_request handle and
- * must comply with the following template::
- *
- * void callback_function(struct crypto_async_request *req, int error)
- */
-static inline void ablkcipher_request_set_callback(
- struct ablkcipher_request *req,
- u32 flags, crypto_completion_t compl, void *data)
-{
- req->base.complete = compl;
- req->base.data = data;
- req->base.flags = flags;
-}
-
-/**
- * ablkcipher_request_set_crypt() - set data buffers
- * @req: request handle
- * @src: source scatter / gather list
- * @dst: destination scatter / gather list
- * @nbytes: number of bytes to process from @src
- * @iv: IV for the cipher operation which must comply with the IV size defined
- * by crypto_ablkcipher_ivsize
- *
- * This function allows setting of the source data and destination data
- * scatter / gather lists.
- *
- * For encryption, the source is treated as the plaintext and the
- * destination is the ciphertext. For a decryption operation, the use is
- * reversed - the source is the ciphertext and the destination is the plaintext.
- */
-static inline void ablkcipher_request_set_crypt(
- struct ablkcipher_request *req,
- struct scatterlist *src, struct scatterlist *dst,
- unsigned int nbytes, void *iv)
-{
- req->src = src;
- req->dst = dst;
- req->nbytes = nbytes;
- req->info = iv;
-}
-
/**
* DOC: Single Block Cipher API
*
projects / kernel.git / commitdiff