crypto: vmx - convert to skcipher API
Convert the VMX implementations of AES-CBC, AES-CTR, and AES-XTS from the deprecated "blkcipher" API to the "skcipher" API. As part of this, I moved the skcipher_request for the fallback algorithm off the stack and into the request context of the parent algorithm. I tested this in a PowerPC VM with CONFIG_CRYPTO_MANAGER_EXTRA_TESTS=y. Signed-off-by: Eric Biggers <ebiggers@google.com> Tested-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers
Herbert Xu
parent
1fa0a7dcf7
commit
2621a8699e
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@ -7,64 +7,52 @@
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* Author: Marcelo Henrique Cerri <mhcerri@br.ibm.com>
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*/
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#include <linux/types.h>
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#include <linux/err.h>
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#include <linux/crypto.h>
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#include <linux/delay.h>
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#include <asm/simd.h>
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#include <asm/switch_to.h>
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#include <crypto/aes.h>
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#include <crypto/internal/simd.h>
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#include <crypto/scatterwalk.h>
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#include <crypto/skcipher.h>
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#include <crypto/internal/skcipher.h>
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#include "aesp8-ppc.h"
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struct p8_aes_cbc_ctx {
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struct crypto_sync_skcipher *fallback;
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struct crypto_skcipher *fallback;
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struct aes_key enc_key;
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struct aes_key dec_key;
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};
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static int p8_aes_cbc_init(struct crypto_tfm *tfm)
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static int p8_aes_cbc_init(struct crypto_skcipher *tfm)
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{
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const char *alg = crypto_tfm_alg_name(tfm);
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struct crypto_sync_skcipher *fallback;
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struct p8_aes_cbc_ctx *ctx = crypto_tfm_ctx(tfm);
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fallback = crypto_alloc_sync_skcipher(alg, 0,
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CRYPTO_ALG_NEED_FALLBACK);
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struct p8_aes_cbc_ctx *ctx = crypto_skcipher_ctx(tfm);
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struct crypto_skcipher *fallback;
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fallback = crypto_alloc_skcipher("cbc(aes)", 0,
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CRYPTO_ALG_NEED_FALLBACK |
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CRYPTO_ALG_ASYNC);
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if (IS_ERR(fallback)) {
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printk(KERN_ERR
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"Failed to allocate transformation for '%s': %ld\n",
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alg, PTR_ERR(fallback));
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pr_err("Failed to allocate cbc(aes) fallback: %ld\n",
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PTR_ERR(fallback));
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return PTR_ERR(fallback);
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}
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crypto_sync_skcipher_set_flags(
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fallback,
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crypto_skcipher_get_flags((struct crypto_skcipher *)tfm));
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crypto_skcipher_set_reqsize(tfm, sizeof(struct skcipher_request) +
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crypto_skcipher_reqsize(fallback));
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ctx->fallback = fallback;
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return 0;
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}
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static void p8_aes_cbc_exit(struct crypto_tfm *tfm)
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static void p8_aes_cbc_exit(struct crypto_skcipher *tfm)
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{
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struct p8_aes_cbc_ctx *ctx = crypto_tfm_ctx(tfm);
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struct p8_aes_cbc_ctx *ctx = crypto_skcipher_ctx(tfm);
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if (ctx->fallback) {
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crypto_free_sync_skcipher(ctx->fallback);
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ctx->fallback = NULL;
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}
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crypto_free_skcipher(ctx->fallback);
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}
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static int p8_aes_cbc_setkey(struct crypto_tfm *tfm, const u8 *key,
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static int p8_aes_cbc_setkey(struct crypto_skcipher *tfm, const u8 *key,
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unsigned int keylen)
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{
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struct p8_aes_cbc_ctx *ctx = crypto_skcipher_ctx(tfm);
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int ret;
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struct p8_aes_cbc_ctx *ctx = crypto_tfm_ctx(tfm);
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preempt_disable();
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pagefault_disable();
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@ -75,108 +63,71 @@ static int p8_aes_cbc_setkey(struct crypto_tfm *tfm, const u8 *key,
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pagefault_enable();
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preempt_enable();
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ret |= crypto_sync_skcipher_setkey(ctx->fallback, key, keylen);
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ret |= crypto_skcipher_setkey(ctx->fallback, key, keylen);
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return ret ? -EINVAL : 0;
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}
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static int p8_aes_cbc_encrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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static int p8_aes_cbc_crypt(struct skcipher_request *req, int enc)
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{
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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const struct p8_aes_cbc_ctx *ctx = crypto_skcipher_ctx(tfm);
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struct skcipher_walk walk;
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unsigned int nbytes;
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int ret;
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struct blkcipher_walk walk;
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struct p8_aes_cbc_ctx *ctx =
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crypto_tfm_ctx(crypto_blkcipher_tfm(desc->tfm));
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if (!crypto_simd_usable()) {
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SYNC_SKCIPHER_REQUEST_ON_STACK(req, ctx->fallback);
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skcipher_request_set_sync_tfm(req, ctx->fallback);
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skcipher_request_set_callback(req, desc->flags, NULL, NULL);
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skcipher_request_set_crypt(req, src, dst, nbytes, desc->info);
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ret = crypto_skcipher_encrypt(req);
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skcipher_request_zero(req);
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} else {
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blkcipher_walk_init(&walk, dst, src, nbytes);
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ret = blkcipher_walk_virt(desc, &walk);
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while ((nbytes = walk.nbytes)) {
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preempt_disable();
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pagefault_disable();
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enable_kernel_vsx();
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aes_p8_cbc_encrypt(walk.src.virt.addr,
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walk.dst.virt.addr,
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nbytes & AES_BLOCK_MASK,
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&ctx->enc_key, walk.iv, 1);
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disable_kernel_vsx();
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pagefault_enable();
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preempt_enable();
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struct skcipher_request *subreq = skcipher_request_ctx(req);
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nbytes &= AES_BLOCK_SIZE - 1;
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ret = blkcipher_walk_done(desc, &walk, nbytes);
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}
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*subreq = *req;
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skcipher_request_set_tfm(subreq, ctx->fallback);
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return enc ? crypto_skcipher_encrypt(subreq) :
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crypto_skcipher_decrypt(subreq);
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}
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ret = skcipher_walk_virt(&walk, req, false);
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while ((nbytes = walk.nbytes) != 0) {
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preempt_disable();
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pagefault_disable();
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enable_kernel_vsx();
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aes_p8_cbc_encrypt(walk.src.virt.addr,
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walk.dst.virt.addr,
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round_down(nbytes, AES_BLOCK_SIZE),
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enc ? &ctx->enc_key : &ctx->dec_key,
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walk.iv, enc);
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disable_kernel_vsx();
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pagefault_enable();
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preempt_enable();
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ret = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE);
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}
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return ret;
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}
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static int p8_aes_cbc_decrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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static int p8_aes_cbc_encrypt(struct skcipher_request *req)
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{
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int ret;
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struct blkcipher_walk walk;
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struct p8_aes_cbc_ctx *ctx =
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crypto_tfm_ctx(crypto_blkcipher_tfm(desc->tfm));
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if (!crypto_simd_usable()) {
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SYNC_SKCIPHER_REQUEST_ON_STACK(req, ctx->fallback);
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skcipher_request_set_sync_tfm(req, ctx->fallback);
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skcipher_request_set_callback(req, desc->flags, NULL, NULL);
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skcipher_request_set_crypt(req, src, dst, nbytes, desc->info);
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ret = crypto_skcipher_decrypt(req);
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skcipher_request_zero(req);
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} else {
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blkcipher_walk_init(&walk, dst, src, nbytes);
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ret = blkcipher_walk_virt(desc, &walk);
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while ((nbytes = walk.nbytes)) {
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preempt_disable();
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pagefault_disable();
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enable_kernel_vsx();
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aes_p8_cbc_encrypt(walk.src.virt.addr,
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walk.dst.virt.addr,
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nbytes & AES_BLOCK_MASK,
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&ctx->dec_key, walk.iv, 0);
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disable_kernel_vsx();
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pagefault_enable();
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preempt_enable();
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nbytes &= AES_BLOCK_SIZE - 1;
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ret = blkcipher_walk_done(desc, &walk, nbytes);
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}
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}
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return ret;
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return p8_aes_cbc_crypt(req, 1);
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}
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static int p8_aes_cbc_decrypt(struct skcipher_request *req)
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{
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return p8_aes_cbc_crypt(req, 0);
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}
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struct crypto_alg p8_aes_cbc_alg = {
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.cra_name = "cbc(aes)",
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.cra_driver_name = "p8_aes_cbc",
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.cra_module = THIS_MODULE,
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.cra_priority = 2000,
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.cra_type = &crypto_blkcipher_type,
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | CRYPTO_ALG_NEED_FALLBACK,
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.cra_alignmask = 0,
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.cra_blocksize = AES_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct p8_aes_cbc_ctx),
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.cra_init = p8_aes_cbc_init,
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.cra_exit = p8_aes_cbc_exit,
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.cra_blkcipher = {
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.ivsize = AES_BLOCK_SIZE,
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.min_keysize = AES_MIN_KEY_SIZE,
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.max_keysize = AES_MAX_KEY_SIZE,
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.setkey = p8_aes_cbc_setkey,
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.encrypt = p8_aes_cbc_encrypt,
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.decrypt = p8_aes_cbc_decrypt,
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},
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struct skcipher_alg p8_aes_cbc_alg = {
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.base.cra_name = "cbc(aes)",
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.base.cra_driver_name = "p8_aes_cbc",
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.base.cra_module = THIS_MODULE,
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.base.cra_priority = 2000,
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.base.cra_flags = CRYPTO_ALG_NEED_FALLBACK,
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.base.cra_blocksize = AES_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct p8_aes_cbc_ctx),
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.setkey = p8_aes_cbc_setkey,
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.encrypt = p8_aes_cbc_encrypt,
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.decrypt = p8_aes_cbc_decrypt,
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.init = p8_aes_cbc_init,
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.exit = p8_aes_cbc_exit,
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.min_keysize = AES_MIN_KEY_SIZE,
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.max_keysize = AES_MAX_KEY_SIZE,
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.ivsize = AES_BLOCK_SIZE,
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};
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@ -7,62 +7,51 @@
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* Author: Marcelo Henrique Cerri <mhcerri@br.ibm.com>
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*/
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#include <linux/types.h>
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#include <linux/err.h>
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#include <linux/crypto.h>
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#include <linux/delay.h>
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#include <asm/simd.h>
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#include <asm/switch_to.h>
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#include <crypto/aes.h>
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#include <crypto/internal/simd.h>
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#include <crypto/scatterwalk.h>
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#include <crypto/skcipher.h>
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#include <crypto/internal/skcipher.h>
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#include "aesp8-ppc.h"
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struct p8_aes_ctr_ctx {
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struct crypto_sync_skcipher *fallback;
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struct crypto_skcipher *fallback;
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struct aes_key enc_key;
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};
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static int p8_aes_ctr_init(struct crypto_tfm *tfm)
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static int p8_aes_ctr_init(struct crypto_skcipher *tfm)
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{
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const char *alg = crypto_tfm_alg_name(tfm);
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struct crypto_sync_skcipher *fallback;
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struct p8_aes_ctr_ctx *ctx = crypto_tfm_ctx(tfm);
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struct p8_aes_ctr_ctx *ctx = crypto_skcipher_ctx(tfm);
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struct crypto_skcipher *fallback;
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fallback = crypto_alloc_sync_skcipher(alg, 0,
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CRYPTO_ALG_NEED_FALLBACK);
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fallback = crypto_alloc_skcipher("ctr(aes)", 0,
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CRYPTO_ALG_NEED_FALLBACK |
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CRYPTO_ALG_ASYNC);
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if (IS_ERR(fallback)) {
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printk(KERN_ERR
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"Failed to allocate transformation for '%s': %ld\n",
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alg, PTR_ERR(fallback));
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pr_err("Failed to allocate ctr(aes) fallback: %ld\n",
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PTR_ERR(fallback));
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return PTR_ERR(fallback);
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}
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crypto_sync_skcipher_set_flags(
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fallback,
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crypto_skcipher_get_flags((struct crypto_skcipher *)tfm));
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crypto_skcipher_set_reqsize(tfm, sizeof(struct skcipher_request) +
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crypto_skcipher_reqsize(fallback));
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ctx->fallback = fallback;
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return 0;
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}
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static void p8_aes_ctr_exit(struct crypto_tfm *tfm)
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static void p8_aes_ctr_exit(struct crypto_skcipher *tfm)
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{
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struct p8_aes_ctr_ctx *ctx = crypto_tfm_ctx(tfm);
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struct p8_aes_ctr_ctx *ctx = crypto_skcipher_ctx(tfm);
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if (ctx->fallback) {
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crypto_free_sync_skcipher(ctx->fallback);
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ctx->fallback = NULL;
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}
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crypto_free_skcipher(ctx->fallback);
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}
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static int p8_aes_ctr_setkey(struct crypto_tfm *tfm, const u8 *key,
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static int p8_aes_ctr_setkey(struct crypto_skcipher *tfm, const u8 *key,
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unsigned int keylen)
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{
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struct p8_aes_ctr_ctx *ctx = crypto_skcipher_ctx(tfm);
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int ret;
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struct p8_aes_ctr_ctx *ctx = crypto_tfm_ctx(tfm);
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preempt_disable();
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pagefault_disable();
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@ -72,13 +61,13 @@ static int p8_aes_ctr_setkey(struct crypto_tfm *tfm, const u8 *key,
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pagefault_enable();
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preempt_enable();
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ret |= crypto_sync_skcipher_setkey(ctx->fallback, key, keylen);
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ret |= crypto_skcipher_setkey(ctx->fallback, key, keylen);
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return ret ? -EINVAL : 0;
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}
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static void p8_aes_ctr_final(struct p8_aes_ctr_ctx *ctx,
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struct blkcipher_walk *walk)
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static void p8_aes_ctr_final(const struct p8_aes_ctr_ctx *ctx,
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struct skcipher_walk *walk)
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{
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u8 *ctrblk = walk->iv;
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u8 keystream[AES_BLOCK_SIZE];
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@ -98,77 +87,63 @@ static void p8_aes_ctr_final(struct p8_aes_ctr_ctx *ctx,
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crypto_inc(ctrblk, AES_BLOCK_SIZE);
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}
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static int p8_aes_ctr_crypt(struct blkcipher_desc *desc,
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struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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static int p8_aes_ctr_crypt(struct skcipher_request *req)
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{
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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const struct p8_aes_ctr_ctx *ctx = crypto_skcipher_ctx(tfm);
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struct skcipher_walk walk;
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unsigned int nbytes;
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int ret;
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u64 inc;
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struct blkcipher_walk walk;
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struct p8_aes_ctr_ctx *ctx =
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crypto_tfm_ctx(crypto_blkcipher_tfm(desc->tfm));
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if (!crypto_simd_usable()) {
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SYNC_SKCIPHER_REQUEST_ON_STACK(req, ctx->fallback);
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skcipher_request_set_sync_tfm(req, ctx->fallback);
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skcipher_request_set_callback(req, desc->flags, NULL, NULL);
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skcipher_request_set_crypt(req, src, dst, nbytes, desc->info);
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ret = crypto_skcipher_encrypt(req);
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skcipher_request_zero(req);
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} else {
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blkcipher_walk_init(&walk, dst, src, nbytes);
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ret = blkcipher_walk_virt_block(desc, &walk, AES_BLOCK_SIZE);
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while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) {
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preempt_disable();
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pagefault_disable();
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enable_kernel_vsx();
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aes_p8_ctr32_encrypt_blocks(walk.src.virt.addr,
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walk.dst.virt.addr,
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(nbytes &
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AES_BLOCK_MASK) /
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AES_BLOCK_SIZE,
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&ctx->enc_key,
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walk.iv);
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disable_kernel_vsx();
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pagefault_enable();
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preempt_enable();
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struct skcipher_request *subreq = skcipher_request_ctx(req);
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/* We need to update IV mostly for last bytes/round */
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inc = (nbytes & AES_BLOCK_MASK) / AES_BLOCK_SIZE;
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if (inc > 0)
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while (inc--)
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crypto_inc(walk.iv, AES_BLOCK_SIZE);
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nbytes &= AES_BLOCK_SIZE - 1;
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ret = blkcipher_walk_done(desc, &walk, nbytes);
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}
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if (walk.nbytes) {
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p8_aes_ctr_final(ctx, &walk);
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ret = blkcipher_walk_done(desc, &walk, 0);
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}
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*subreq = *req;
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skcipher_request_set_tfm(subreq, ctx->fallback);
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return crypto_skcipher_encrypt(subreq);
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}
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ret = skcipher_walk_virt(&walk, req, false);
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while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) {
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preempt_disable();
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pagefault_disable();
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enable_kernel_vsx();
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aes_p8_ctr32_encrypt_blocks(walk.src.virt.addr,
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walk.dst.virt.addr,
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nbytes / AES_BLOCK_SIZE,
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&ctx->enc_key, walk.iv);
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disable_kernel_vsx();
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pagefault_enable();
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preempt_enable();
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do {
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crypto_inc(walk.iv, AES_BLOCK_SIZE);
|
||||
} while ((nbytes -= AES_BLOCK_SIZE) >= AES_BLOCK_SIZE);
|
||||
|
||||
ret = skcipher_walk_done(&walk, nbytes);
|
||||
}
|
||||
if (nbytes) {
|
||||
p8_aes_ctr_final(ctx, &walk);
|
||||
ret = skcipher_walk_done(&walk, 0);
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
struct crypto_alg p8_aes_ctr_alg = {
|
||||
.cra_name = "ctr(aes)",
|
||||
.cra_driver_name = "p8_aes_ctr",
|
||||
.cra_module = THIS_MODULE,
|
||||
.cra_priority = 2000,
|
||||
.cra_type = &crypto_blkcipher_type,
|
||||
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | CRYPTO_ALG_NEED_FALLBACK,
|
||||
.cra_alignmask = 0,
|
||||
.cra_blocksize = 1,
|
||||
.cra_ctxsize = sizeof(struct p8_aes_ctr_ctx),
|
||||
.cra_init = p8_aes_ctr_init,
|
||||
.cra_exit = p8_aes_ctr_exit,
|
||||
.cra_blkcipher = {
|
||||
.ivsize = AES_BLOCK_SIZE,
|
||||
.min_keysize = AES_MIN_KEY_SIZE,
|
||||
.max_keysize = AES_MAX_KEY_SIZE,
|
||||
.setkey = p8_aes_ctr_setkey,
|
||||
.encrypt = p8_aes_ctr_crypt,
|
||||
.decrypt = p8_aes_ctr_crypt,
|
||||
},
|
||||
struct skcipher_alg p8_aes_ctr_alg = {
|
||||
.base.cra_name = "ctr(aes)",
|
||||
.base.cra_driver_name = "p8_aes_ctr",
|
||||
.base.cra_module = THIS_MODULE,
|
||||
.base.cra_priority = 2000,
|
||||
.base.cra_flags = CRYPTO_ALG_NEED_FALLBACK,
|
||||
.base.cra_blocksize = 1,
|
||||
.base.cra_ctxsize = sizeof(struct p8_aes_ctr_ctx),
|
||||
.setkey = p8_aes_ctr_setkey,
|
||||
.encrypt = p8_aes_ctr_crypt,
|
||||
.decrypt = p8_aes_ctr_crypt,
|
||||
.init = p8_aes_ctr_init,
|
||||
.exit = p8_aes_ctr_exit,
|
||||
.min_keysize = AES_MIN_KEY_SIZE,
|
||||
.max_keysize = AES_MAX_KEY_SIZE,
|
||||
.ivsize = AES_BLOCK_SIZE,
|
||||
.chunksize = AES_BLOCK_SIZE,
|
||||
};
|
||||
|
|
|
|||
|
|
@ -7,67 +7,56 @@
|
|||
* Author: Leonidas S. Barbosa <leosilva@linux.vnet.ibm.com>
|
||||
*/
|
||||
|
||||
#include <linux/types.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/crypto.h>
|
||||
#include <linux/delay.h>
|
||||
#include <asm/simd.h>
|
||||
#include <asm/switch_to.h>
|
||||
#include <crypto/aes.h>
|
||||
#include <crypto/internal/simd.h>
|
||||
#include <crypto/scatterwalk.h>
|
||||
#include <crypto/internal/skcipher.h>
|
||||
#include <crypto/xts.h>
|
||||
#include <crypto/skcipher.h>
|
||||
|
||||
#include "aesp8-ppc.h"
|
||||
|
||||
struct p8_aes_xts_ctx {
|
||||
struct crypto_sync_skcipher *fallback;
|
||||
struct crypto_skcipher *fallback;
|
||||
struct aes_key enc_key;
|
||||
struct aes_key dec_key;
|
||||
struct aes_key tweak_key;
|
||||
};
|
||||
|
||||
static int p8_aes_xts_init(struct crypto_tfm *tfm)
|
||||
static int p8_aes_xts_init(struct crypto_skcipher *tfm)
|
||||
{
|
||||
const char *alg = crypto_tfm_alg_name(tfm);
|
||||
struct crypto_sync_skcipher *fallback;
|
||||
struct p8_aes_xts_ctx *ctx = crypto_tfm_ctx(tfm);
|
||||
struct p8_aes_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
|
||||
struct crypto_skcipher *fallback;
|
||||
|
||||
fallback = crypto_alloc_sync_skcipher(alg, 0,
|
||||
CRYPTO_ALG_NEED_FALLBACK);
|
||||
fallback = crypto_alloc_skcipher("xts(aes)", 0,
|
||||
CRYPTO_ALG_NEED_FALLBACK |
|
||||
CRYPTO_ALG_ASYNC);
|
||||
if (IS_ERR(fallback)) {
|
||||
printk(KERN_ERR
|
||||
"Failed to allocate transformation for '%s': %ld\n",
|
||||
alg, PTR_ERR(fallback));
|
||||
pr_err("Failed to allocate xts(aes) fallback: %ld\n",
|
||||
PTR_ERR(fallback));
|
||||
return PTR_ERR(fallback);
|
||||
}
|
||||
|
||||
crypto_sync_skcipher_set_flags(
|
||||
fallback,
|
||||
crypto_skcipher_get_flags((struct crypto_skcipher *)tfm));
|
||||
crypto_skcipher_set_reqsize(tfm, sizeof(struct skcipher_request) +
|
||||
crypto_skcipher_reqsize(fallback));
|
||||
ctx->fallback = fallback;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void p8_aes_xts_exit(struct crypto_tfm *tfm)
|
||||
static void p8_aes_xts_exit(struct crypto_skcipher *tfm)
|
||||
{
|
||||
struct p8_aes_xts_ctx *ctx = crypto_tfm_ctx(tfm);
|
||||
struct p8_aes_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
|
||||
|
||||
if (ctx->fallback) {
|
||||
crypto_free_sync_skcipher(ctx->fallback);
|
||||
ctx->fallback = NULL;
|
||||
}
|
||||
crypto_free_skcipher(ctx->fallback);
|
||||
}
|
||||
|
||||
static int p8_aes_xts_setkey(struct crypto_tfm *tfm, const u8 *key,
|
||||
static int p8_aes_xts_setkey(struct crypto_skcipher *tfm, const u8 *key,
|
||||
unsigned int keylen)
|
||||
{
|
||||
struct p8_aes_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
|
||||
int ret;
|
||||
struct p8_aes_xts_ctx *ctx = crypto_tfm_ctx(tfm);
|
||||
|
||||
ret = xts_check_key(tfm, key, keylen);
|
||||
ret = xts_verify_key(tfm, key, keylen);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
|
|
@ -81,100 +70,90 @@ static int p8_aes_xts_setkey(struct crypto_tfm *tfm, const u8 *key,
|
|||
pagefault_enable();
|
||||
preempt_enable();
|
||||
|
||||
ret |= crypto_sync_skcipher_setkey(ctx->fallback, key, keylen);
|
||||
ret |= crypto_skcipher_setkey(ctx->fallback, key, keylen);
|
||||
|
||||
return ret ? -EINVAL : 0;
|
||||
}
|
||||
|
||||
static int p8_aes_xts_crypt(struct blkcipher_desc *desc,
|
||||
struct scatterlist *dst,
|
||||
struct scatterlist *src,
|
||||
unsigned int nbytes, int enc)
|
||||
static int p8_aes_xts_crypt(struct skcipher_request *req, int enc)
|
||||
{
|
||||
int ret;
|
||||
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
|
||||
const struct p8_aes_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
|
||||
struct skcipher_walk walk;
|
||||
unsigned int nbytes;
|
||||
u8 tweak[AES_BLOCK_SIZE];
|
||||
u8 *iv;
|
||||
struct blkcipher_walk walk;
|
||||
struct p8_aes_xts_ctx *ctx =
|
||||
crypto_tfm_ctx(crypto_blkcipher_tfm(desc->tfm));
|
||||
int ret;
|
||||
|
||||
if (!crypto_simd_usable()) {
|
||||
SYNC_SKCIPHER_REQUEST_ON_STACK(req, ctx->fallback);
|
||||
skcipher_request_set_sync_tfm(req, ctx->fallback);
|
||||
skcipher_request_set_callback(req, desc->flags, NULL, NULL);
|
||||
skcipher_request_set_crypt(req, src, dst, nbytes, desc->info);
|
||||
ret = enc? crypto_skcipher_encrypt(req) : crypto_skcipher_decrypt(req);
|
||||
skcipher_request_zero(req);
|
||||
} else {
|
||||
blkcipher_walk_init(&walk, dst, src, nbytes);
|
||||
struct skcipher_request *subreq = skcipher_request_ctx(req);
|
||||
|
||||
ret = blkcipher_walk_virt(desc, &walk);
|
||||
*subreq = *req;
|
||||
skcipher_request_set_tfm(subreq, ctx->fallback);
|
||||
return enc ? crypto_skcipher_encrypt(subreq) :
|
||||
crypto_skcipher_decrypt(subreq);
|
||||
}
|
||||
|
||||
ret = skcipher_walk_virt(&walk, req, false);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
preempt_disable();
|
||||
pagefault_disable();
|
||||
enable_kernel_vsx();
|
||||
|
||||
aes_p8_encrypt(walk.iv, tweak, &ctx->tweak_key);
|
||||
|
||||
disable_kernel_vsx();
|
||||
pagefault_enable();
|
||||
preempt_enable();
|
||||
|
||||
while ((nbytes = walk.nbytes) != 0) {
|
||||
preempt_disable();
|
||||
pagefault_disable();
|
||||
enable_kernel_vsx();
|
||||
|
||||
iv = walk.iv;
|
||||
memset(tweak, 0, AES_BLOCK_SIZE);
|
||||
aes_p8_encrypt(iv, tweak, &ctx->tweak_key);
|
||||
|
||||
if (enc)
|
||||
aes_p8_xts_encrypt(walk.src.virt.addr,
|
||||
walk.dst.virt.addr,
|
||||
round_down(nbytes, AES_BLOCK_SIZE),
|
||||
&ctx->enc_key, NULL, tweak);
|
||||
else
|
||||
aes_p8_xts_decrypt(walk.src.virt.addr,
|
||||
walk.dst.virt.addr,
|
||||
round_down(nbytes, AES_BLOCK_SIZE),
|
||||
&ctx->dec_key, NULL, tweak);
|
||||
disable_kernel_vsx();
|
||||
pagefault_enable();
|
||||
preempt_enable();
|
||||
|
||||
while ((nbytes = walk.nbytes)) {
|
||||
preempt_disable();
|
||||
pagefault_disable();
|
||||
enable_kernel_vsx();
|
||||
if (enc)
|
||||
aes_p8_xts_encrypt(walk.src.virt.addr, walk.dst.virt.addr,
|
||||
nbytes & AES_BLOCK_MASK, &ctx->enc_key, NULL, tweak);
|
||||
else
|
||||
aes_p8_xts_decrypt(walk.src.virt.addr, walk.dst.virt.addr,
|
||||
nbytes & AES_BLOCK_MASK, &ctx->dec_key, NULL, tweak);
|
||||
disable_kernel_vsx();
|
||||
pagefault_enable();
|
||||
preempt_enable();
|
||||
|
||||
nbytes &= AES_BLOCK_SIZE - 1;
|
||||
ret = blkcipher_walk_done(desc, &walk, nbytes);
|
||||
}
|
||||
ret = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE);
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int p8_aes_xts_encrypt(struct blkcipher_desc *desc,
|
||||
struct scatterlist *dst,
|
||||
struct scatterlist *src, unsigned int nbytes)
|
||||
static int p8_aes_xts_encrypt(struct skcipher_request *req)
|
||||
{
|
||||
return p8_aes_xts_crypt(desc, dst, src, nbytes, 1);
|
||||
return p8_aes_xts_crypt(req, 1);
|
||||
}
|
||||
|
||||
static int p8_aes_xts_decrypt(struct blkcipher_desc *desc,
|
||||
struct scatterlist *dst,
|
||||
struct scatterlist *src, unsigned int nbytes)
|
||||
static int p8_aes_xts_decrypt(struct skcipher_request *req)
|
||||
{
|
||||
return p8_aes_xts_crypt(desc, dst, src, nbytes, 0);
|
||||
return p8_aes_xts_crypt(req, 0);
|
||||
}
|
||||
|
||||
struct crypto_alg p8_aes_xts_alg = {
|
||||
.cra_name = "xts(aes)",
|
||||
.cra_driver_name = "p8_aes_xts",
|
||||
.cra_module = THIS_MODULE,
|
||||
.cra_priority = 2000,
|
||||
.cra_type = &crypto_blkcipher_type,
|
||||
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | CRYPTO_ALG_NEED_FALLBACK,
|
||||
.cra_alignmask = 0,
|
||||
.cra_blocksize = AES_BLOCK_SIZE,
|
||||
.cra_ctxsize = sizeof(struct p8_aes_xts_ctx),
|
||||
.cra_init = p8_aes_xts_init,
|
||||
.cra_exit = p8_aes_xts_exit,
|
||||
.cra_blkcipher = {
|
||||
.ivsize = AES_BLOCK_SIZE,
|
||||
.min_keysize = 2 * AES_MIN_KEY_SIZE,
|
||||
.max_keysize = 2 * AES_MAX_KEY_SIZE,
|
||||
.setkey = p8_aes_xts_setkey,
|
||||
.encrypt = p8_aes_xts_encrypt,
|
||||
.decrypt = p8_aes_xts_decrypt,
|
||||
}
|
||||
struct skcipher_alg p8_aes_xts_alg = {
|
||||
.base.cra_name = "xts(aes)",
|
||||
.base.cra_driver_name = "p8_aes_xts",
|
||||
.base.cra_module = THIS_MODULE,
|
||||
.base.cra_priority = 2000,
|
||||
.base.cra_flags = CRYPTO_ALG_NEED_FALLBACK,
|
||||
.base.cra_blocksize = AES_BLOCK_SIZE,
|
||||
.base.cra_ctxsize = sizeof(struct p8_aes_xts_ctx),
|
||||
.setkey = p8_aes_xts_setkey,
|
||||
.encrypt = p8_aes_xts_encrypt,
|
||||
.decrypt = p8_aes_xts_decrypt,
|
||||
.init = p8_aes_xts_init,
|
||||
.exit = p8_aes_xts_exit,
|
||||
.min_keysize = 2 * AES_MIN_KEY_SIZE,
|
||||
.max_keysize = 2 * AES_MAX_KEY_SIZE,
|
||||
.ivsize = AES_BLOCK_SIZE,
|
||||
};
|
||||
|
|
|
|||
|
|
@ -2,8 +2,6 @@
|
|||
#include <linux/types.h>
|
||||
#include <crypto/aes.h>
|
||||
|
||||
#define AES_BLOCK_MASK (~(AES_BLOCK_SIZE-1))
|
||||
|
||||
struct aes_key {
|
||||
u8 key[AES_MAX_KEYLENGTH];
|
||||
int rounds;
|
||||
|
|
|
|||
|
|
@ -15,54 +15,58 @@
|
|||
#include <linux/crypto.h>
|
||||
#include <asm/cputable.h>
|
||||
#include <crypto/internal/hash.h>
|
||||
#include <crypto/internal/skcipher.h>
|
||||
|
||||
extern struct shash_alg p8_ghash_alg;
|
||||
extern struct crypto_alg p8_aes_alg;
|
||||
extern struct crypto_alg p8_aes_cbc_alg;
|
||||
extern struct crypto_alg p8_aes_ctr_alg;
|
||||
extern struct crypto_alg p8_aes_xts_alg;
|
||||
static struct crypto_alg *algs[] = {
|
||||
&p8_aes_alg,
|
||||
&p8_aes_cbc_alg,
|
||||
&p8_aes_ctr_alg,
|
||||
&p8_aes_xts_alg,
|
||||
NULL,
|
||||
};
|
||||
extern struct skcipher_alg p8_aes_cbc_alg;
|
||||
extern struct skcipher_alg p8_aes_ctr_alg;
|
||||
extern struct skcipher_alg p8_aes_xts_alg;
|
||||
|
||||
static int __init p8_init(void)
|
||||
{
|
||||
int ret = 0;
|
||||
struct crypto_alg **alg_it;
|
||||
|
||||
for (alg_it = algs; *alg_it; alg_it++) {
|
||||
ret = crypto_register_alg(*alg_it);
|
||||
printk(KERN_INFO "crypto_register_alg '%s' = %d\n",
|
||||
(*alg_it)->cra_name, ret);
|
||||
if (ret) {
|
||||
for (alg_it--; alg_it >= algs; alg_it--)
|
||||
crypto_unregister_alg(*alg_it);
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (ret)
|
||||
return ret;
|
||||
int ret;
|
||||
|
||||
ret = crypto_register_shash(&p8_ghash_alg);
|
||||
if (ret) {
|
||||
for (alg_it = algs; *alg_it; alg_it++)
|
||||
crypto_unregister_alg(*alg_it);
|
||||
}
|
||||
if (ret)
|
||||
goto err;
|
||||
|
||||
ret = crypto_register_alg(&p8_aes_alg);
|
||||
if (ret)
|
||||
goto err_unregister_ghash;
|
||||
|
||||
ret = crypto_register_skcipher(&p8_aes_cbc_alg);
|
||||
if (ret)
|
||||
goto err_unregister_aes;
|
||||
|
||||
ret = crypto_register_skcipher(&p8_aes_ctr_alg);
|
||||
if (ret)
|
||||
goto err_unregister_aes_cbc;
|
||||
|
||||
ret = crypto_register_skcipher(&p8_aes_xts_alg);
|
||||
if (ret)
|
||||
goto err_unregister_aes_ctr;
|
||||
|
||||
return 0;
|
||||
|
||||
err_unregister_aes_ctr:
|
||||
crypto_unregister_skcipher(&p8_aes_ctr_alg);
|
||||
err_unregister_aes_cbc:
|
||||
crypto_unregister_skcipher(&p8_aes_cbc_alg);
|
||||
err_unregister_aes:
|
||||
crypto_unregister_alg(&p8_aes_alg);
|
||||
err_unregister_ghash:
|
||||
crypto_unregister_shash(&p8_ghash_alg);
|
||||
err:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void __exit p8_exit(void)
|
||||
{
|
||||
struct crypto_alg **alg_it;
|
||||
|
||||
for (alg_it = algs; *alg_it; alg_it++) {
|
||||
printk(KERN_INFO "Removing '%s'\n", (*alg_it)->cra_name);
|
||||
crypto_unregister_alg(*alg_it);
|
||||
}
|
||||
crypto_unregister_skcipher(&p8_aes_xts_alg);
|
||||
crypto_unregister_skcipher(&p8_aes_ctr_alg);
|
||||
crypto_unregister_skcipher(&p8_aes_cbc_alg);
|
||||
crypto_unregister_alg(&p8_aes_alg);
|
||||
crypto_unregister_shash(&p8_ghash_alg);
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue