diff options
author | Eric Biggers <ebiggers@google.com> | 2019-05-20 09:44:48 -0700 |
---|---|---|
committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-05-30 15:28:40 +0800 |
commit | 2621a8699e81c0a4f17d7b98ef22f1f89975a7b5 (patch) | |
tree | b0fdfeea8fc24554caf48d43d27ee2e199b377b5 | |
parent | 1fa0a7dcf7599f318e10e42ae66a0fe670fdc7bd (diff) |
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>
-rw-r--r-- | drivers/crypto/vmx/aes_cbc.c | 183 | ||||
-rw-r--r-- | drivers/crypto/vmx/aes_ctr.c | 165 | ||||
-rw-r--r-- | drivers/crypto/vmx/aes_xts.c | 175 | ||||
-rw-r--r-- | drivers/crypto/vmx/aesp8-ppc.h | 2 | ||||
-rw-r--r-- | drivers/crypto/vmx/vmx.c | 72 |
5 files changed, 252 insertions, 345 deletions
diff --git a/drivers/crypto/vmx/aes_cbc.c b/drivers/crypto/vmx/aes_cbc.c index dae8af3c46dc..92e75a05d6a9 100644 --- a/drivers/crypto/vmx/aes_cbc.c +++ b/drivers/crypto/vmx/aes_cbc.c @@ -7,64 +7,52 @@ * Author: Marcelo Henrique Cerri <mhcerri@br.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/skcipher.h> +#include <crypto/internal/skcipher.h> #include "aesp8-ppc.h" struct p8_aes_cbc_ctx { - struct crypto_sync_skcipher *fallback; + struct crypto_skcipher *fallback; struct aes_key enc_key; struct aes_key dec_key; }; -static int p8_aes_cbc_init(struct crypto_tfm *tfm) +static int p8_aes_cbc_init(struct crypto_skcipher *tfm) { - const char *alg = crypto_tfm_alg_name(tfm); - struct crypto_sync_skcipher *fallback; - struct p8_aes_cbc_ctx *ctx = crypto_tfm_ctx(tfm); - - fallback = crypto_alloc_sync_skcipher(alg, 0, - CRYPTO_ALG_NEED_FALLBACK); + struct p8_aes_cbc_ctx *ctx = crypto_skcipher_ctx(tfm); + struct crypto_skcipher *fallback; + fallback = crypto_alloc_skcipher("cbc(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 cbc(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_cbc_exit(struct crypto_tfm *tfm) +static void p8_aes_cbc_exit(struct crypto_skcipher *tfm) { - struct p8_aes_cbc_ctx *ctx = crypto_tfm_ctx(tfm); + struct p8_aes_cbc_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_cbc_setkey(struct crypto_tfm *tfm, const u8 *key, +static int p8_aes_cbc_setkey(struct crypto_skcipher *tfm, const u8 *key, unsigned int keylen) { + struct p8_aes_cbc_ctx *ctx = crypto_skcipher_ctx(tfm); int ret; - struct p8_aes_cbc_ctx *ctx = crypto_tfm_ctx(tfm); preempt_disable(); pagefault_disable(); @@ -75,108 +63,71 @@ static int p8_aes_cbc_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_cbc_encrypt(struct blkcipher_desc *desc, - struct scatterlist *dst, - struct scatterlist *src, unsigned int nbytes) +static int p8_aes_cbc_crypt(struct skcipher_request *req, int enc) { + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + const struct p8_aes_cbc_ctx *ctx = crypto_skcipher_ctx(tfm); + struct skcipher_walk walk; + unsigned int nbytes; int ret; - struct blkcipher_walk walk; - struct p8_aes_cbc_ctx *ctx = - crypto_tfm_ctx(crypto_blkcipher_tfm(desc->tfm)); 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 = crypto_skcipher_encrypt(req); - skcipher_request_zero(req); - } else { - blkcipher_walk_init(&walk, dst, src, nbytes); - ret = blkcipher_walk_virt(desc, &walk); - while ((nbytes = walk.nbytes)) { - preempt_disable(); - pagefault_disable(); - enable_kernel_vsx(); - aes_p8_cbc_encrypt(walk.src.virt.addr, - walk.dst.virt.addr, - nbytes & AES_BLOCK_MASK, - &ctx->enc_key, walk.iv, 1); - disable_kernel_vsx(); - pagefault_enable(); - preempt_enable(); - - nbytes &= AES_BLOCK_SIZE - 1; - ret = blkcipher_walk_done(desc, &walk, nbytes); - } + struct skcipher_request *subreq = skcipher_request_ctx(req); + + *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); + while ((nbytes = walk.nbytes) != 0) { + preempt_disable(); + pagefault_disable(); + enable_kernel_vsx(); + aes_p8_cbc_encrypt(walk.src.virt.addr, + walk.dst.virt.addr, + round_down(nbytes, AES_BLOCK_SIZE), + enc ? &ctx->enc_key : &ctx->dec_key, + walk.iv, enc); + disable_kernel_vsx(); + pagefault_enable(); + preempt_enable(); + + ret = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE); + } return ret; } -static int p8_aes_cbc_decrypt(struct blkcipher_desc *desc, - struct scatterlist *dst, - struct scatterlist *src, unsigned int nbytes) +static int p8_aes_cbc_encrypt(struct skcipher_request *req) { - int ret; - struct blkcipher_walk walk; - struct p8_aes_cbc_ctx *ctx = - crypto_tfm_ctx(crypto_blkcipher_tfm(desc->tfm)); - - 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 = crypto_skcipher_decrypt(req); - skcipher_request_zero(req); - } else { - blkcipher_walk_init(&walk, dst, src, nbytes); - ret = blkcipher_walk_virt(desc, &walk); - while ((nbytes = walk.nbytes)) { - preempt_disable(); - pagefault_disable(); - enable_kernel_vsx(); - aes_p8_cbc_encrypt(walk.src.virt.addr, - walk.dst.virt.addr, - nbytes & AES_BLOCK_MASK, - &ctx->dec_key, walk.iv, 0); - disable_kernel_vsx(); - pagefault_enable(); - preempt_enable(); - - nbytes &= AES_BLOCK_SIZE - 1; - ret = blkcipher_walk_done(desc, &walk, nbytes); - } - } - - return ret; + return p8_aes_cbc_crypt(req, 1); } +static int p8_aes_cbc_decrypt(struct skcipher_request *req) +{ + return p8_aes_cbc_crypt(req, 0); +} -struct crypto_alg p8_aes_cbc_alg = { - .cra_name = "cbc(aes)", - .cra_driver_name = "p8_aes_cbc", - .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_cbc_ctx), - .cra_init = p8_aes_cbc_init, - .cra_exit = p8_aes_cbc_exit, - .cra_blkcipher = { - .ivsize = AES_BLOCK_SIZE, - .min_keysize = AES_MIN_KEY_SIZE, - .max_keysize = AES_MAX_KEY_SIZE, - .setkey = p8_aes_cbc_setkey, - .encrypt = p8_aes_cbc_encrypt, - .decrypt = p8_aes_cbc_decrypt, - }, +struct skcipher_alg p8_aes_cbc_alg = { + .base.cra_name = "cbc(aes)", + .base.cra_driver_name = "p8_aes_cbc", + .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_cbc_ctx), + .setkey = p8_aes_cbc_setkey, + .encrypt = p8_aes_cbc_encrypt, + .decrypt = p8_aes_cbc_decrypt, + .init = p8_aes_cbc_init, + .exit = p8_aes_cbc_exit, + .min_keysize = AES_MIN_KEY_SIZE, + .max_keysize = AES_MAX_KEY_SIZE, + .ivsize = AES_BLOCK_SIZE, }; diff --git a/drivers/crypto/vmx/aes_ctr.c b/drivers/crypto/vmx/aes_ctr.c index dc3110117844..c4d2809a5d9e 100644 --- a/drivers/crypto/vmx/aes_ctr.c +++ b/drivers/crypto/vmx/aes_ctr.c @@ -7,62 +7,51 @@ * Author: Marcelo Henrique Cerri <mhcerri@br.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/skcipher.h> +#include <crypto/internal/skcipher.h> #include "aesp8-ppc.h" struct p8_aes_ctr_ctx { - struct crypto_sync_skcipher *fallback; + struct crypto_skcipher *fallback; struct aes_key enc_key; }; -static int p8_aes_ctr_init(struct crypto_tfm *tfm) +static int p8_aes_ctr_init(struct crypto_skcipher *tfm) { - const char *alg = crypto_tfm_alg_name(tfm); - struct crypto_sync_skcipher *fallback; - struct p8_aes_ctr_ctx *ctx = crypto_tfm_ctx(tfm); + struct p8_aes_ctr_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("ctr(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 ctr(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_ctr_exit(struct crypto_tfm *tfm) +static void p8_aes_ctr_exit(struct crypto_skcipher *tfm) { - struct p8_aes_ctr_ctx *ctx = crypto_tfm_ctx(tfm); + struct p8_aes_ctr_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_ctr_setkey(struct crypto_tfm *tfm, const u8 *key, +static int p8_aes_ctr_setkey(struct crypto_skcipher *tfm, const u8 *key, unsigned int keylen) { + struct p8_aes_ctr_ctx *ctx = crypto_skcipher_ctx(tfm); int ret; - struct p8_aes_ctr_ctx *ctx = crypto_tfm_ctx(tfm); preempt_disable(); pagefault_disable(); @@ -72,13 +61,13 @@ static int p8_aes_ctr_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 void p8_aes_ctr_final(struct p8_aes_ctr_ctx *ctx, - struct blkcipher_walk *walk) +static void p8_aes_ctr_final(const struct p8_aes_ctr_ctx *ctx, + struct skcipher_walk *walk) { u8 *ctrblk = walk->iv; u8 keystream[AES_BLOCK_SIZE]; @@ -98,77 +87,63 @@ static void p8_aes_ctr_final(struct p8_aes_ctr_ctx *ctx, crypto_inc(ctrblk, AES_BLOCK_SIZE); } -static int p8_aes_ctr_crypt(struct blkcipher_desc *desc, - struct scatterlist *dst, - struct scatterlist *src, unsigned int nbytes) +static int p8_aes_ctr_crypt(struct skcipher_request *req) { + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + const struct p8_aes_ctr_ctx *ctx = crypto_skcipher_ctx(tfm); + struct skcipher_walk walk; + unsigned int nbytes; int ret; - u64 inc; - struct blkcipher_walk walk; - struct p8_aes_ctr_ctx *ctx = - crypto_tfm_ctx(crypto_blkcipher_tfm(desc->tfm)); 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 = crypto_skcipher_encrypt(req); - skcipher_request_zero(req); - } else { - blkcipher_walk_init(&walk, dst, src, nbytes); - ret = blkcipher_walk_virt_block(desc, &walk, AES_BLOCK_SIZE); - while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) { - preempt_disable(); - pagefault_disable(); - enable_kernel_vsx(); - aes_p8_ctr32_encrypt_blocks(walk.src.virt.addr, - walk.dst.virt.addr, - (nbytes & - AES_BLOCK_MASK) / - AES_BLOCK_SIZE, - &ctx->enc_key, - walk.iv); - disable_kernel_vsx(); - pagefault_enable(); - preempt_enable(); - - /* We need to update IV mostly for last bytes/round */ - inc = (nbytes & AES_BLOCK_MASK) / AES_BLOCK_SIZE; - if (inc > 0) - while (inc--) - crypto_inc(walk.iv, AES_BLOCK_SIZE); - - nbytes &= AES_BLOCK_SIZE - 1; - ret = blkcipher_walk_done(desc, &walk, nbytes); - } - if (walk.nbytes) { - p8_aes_ctr_final(ctx, &walk); - ret = blkcipher_walk_done(desc, &walk, 0); - } + struct skcipher_request *subreq = skcipher_request_ctx(req); + + *subreq = *req; + skcipher_request_set_tfm(subreq, ctx->fallback); + return crypto_skcipher_encrypt(subreq); } + ret = skcipher_walk_virt(&walk, req, false); + while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) { + preempt_disable(); + pagefault_disable(); + enable_kernel_vsx(); + aes_p8_ctr32_encrypt_blocks(walk.src.virt.addr, + walk.dst.virt.addr, + nbytes / AES_BLOCK_SIZE, + &ctx->enc_key, walk.iv); + disable_kernel_vsx(); + pagefault_enable(); + preempt_enable(); + + do { + 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, }; diff --git a/drivers/crypto/vmx/aes_xts.c b/drivers/crypto/vmx/aes_xts.c index aee1339f134e..965d8e03321c 100644 --- a/drivers/crypto/vmx/aes_xts.c +++ b/drivers/crypto/vmx/aes_xts.c @@ -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); + + *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(); - ret = blkcipher_walk_virt(desc, &walk); + 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, }; diff --git a/drivers/crypto/vmx/aesp8-ppc.h b/drivers/crypto/vmx/aesp8-ppc.h index 349646b73754..01774a4d26a2 100644 --- a/drivers/crypto/vmx/aesp8-ppc.h +++ b/drivers/crypto/vmx/aesp8-ppc.h @@ -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; diff --git a/drivers/crypto/vmx/vmx.c b/drivers/crypto/vmx/vmx.c index abd89c2bcec4..eff03fdf964f 100644 --- a/drivers/crypto/vmx/vmx.c +++ b/drivers/crypto/vmx/vmx.c @@ -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; + int ret; - 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; - } - } + ret = crypto_register_shash(&p8_ghash_alg); if (ret) - return ret; + goto err; - ret = crypto_register_shash(&p8_ghash_alg); - if (ret) { - for (alg_it = algs; *alg_it; alg_it++) - crypto_unregister_alg(*alg_it); - } + 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); } |