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Commit 713b2e72 authored by Eric Biggers's avatar Eric Biggers Committed by Herbert Xu
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crypto: padlock-aes - convert to skcipher API 

Convert the VIA PadLock implementations of AES-ECB and AES-CBC from the
deprecated "blkcipher" API to the "skcipher" API.  This is needed in
order for the blkcipher API to be removed.
Signed-off-by: default avatarEric Biggers <ebiggers@google.com>
Reviewed-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent fabdf253
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Showing with 74 additions and 83 deletions
drivers/crypto/padlock-aes.c
View file @ 713b2e72
......@@ -10,6 +10,7 @@
#include <crypto/algapi.h>
#include <crypto/aes.h>
#include <crypto/internal/skcipher.h>
#include <crypto/padlock.h>
#include <linux/module.h>
#include <linux/init.h>
......@@ -97,9 +98,9 @@ static inline struct aes_ctx *aes_ctx(struct crypto_tfm *tfm)
return aes_ctx_common(crypto_tfm_ctx(tfm));
}
static inline struct aes_ctx *blk_aes_ctx(struct crypto_blkcipher *tfm)
static inline struct aes_ctx *skcipher_aes_ctx(struct crypto_skcipher *tfm)
{
return aes_ctx_common(crypto_blkcipher_ctx(tfm));
return aes_ctx_common(crypto_skcipher_ctx(tfm));
}
static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
......@@ -162,6 +163,12 @@ static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
return 0;
}
static int aes_set_key_skcipher(struct crypto_skcipher *tfm, const u8 *in_key,
unsigned int key_len)
{
return aes_set_key(crypto_skcipher_tfm(tfm), in_key, key_len);
}
/* ====== Encryption/decryption routines ====== */
/* These are the real call to PadLock. */
......@@ -338,25 +345,24 @@ static struct crypto_alg aes_alg = {
}
};
static int ecb_aes_encrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
static int ecb_aes_encrypt(struct skcipher_request *req)
{
struct aes_ctx *ctx = blk_aes_ctx(desc->tfm);
struct blkcipher_walk walk;
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
struct aes_ctx *ctx = skcipher_aes_ctx(tfm);
struct skcipher_walk walk;
unsigned int nbytes;
int err;
padlock_reset_key(&ctx->cword.encrypt);
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt(desc, &walk);
err = skcipher_walk_virt(&walk, req, false);
while ((nbytes = walk.nbytes)) {
while ((nbytes = walk.nbytes) != 0) {
padlock_xcrypt_ecb(walk.src.virt.addr, walk.dst.virt.addr,
ctx->E, &ctx->cword.encrypt,
nbytes / AES_BLOCK_SIZE);
nbytes &= AES_BLOCK_SIZE - 1;
err = blkcipher_walk_done(desc, &walk, nbytes);
err = skcipher_walk_done(&walk, nbytes);
}
padlock_store_cword(&ctx->cword.encrypt);
......@@ -364,25 +370,24 @@ static int ecb_aes_encrypt(struct blkcipher_desc *desc,
return err;
}
static int ecb_aes_decrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
static int ecb_aes_decrypt(struct skcipher_request *req)
{
struct aes_ctx *ctx = blk_aes_ctx(desc->tfm);
struct blkcipher_walk walk;
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
struct aes_ctx *ctx = skcipher_aes_ctx(tfm);
struct skcipher_walk walk;
unsigned int nbytes;
int err;
padlock_reset_key(&ctx->cword.decrypt);
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt(desc, &walk);
err = skcipher_walk_virt(&walk, req, false);
while ((nbytes = walk.nbytes)) {
while ((nbytes = walk.nbytes) != 0) {
padlock_xcrypt_ecb(walk.src.virt.addr, walk.dst.virt.addr,
ctx->D, &ctx->cword.decrypt,
nbytes / AES_BLOCK_SIZE);
nbytes &= AES_BLOCK_SIZE - 1;
err = blkcipher_walk_done(desc, &walk, nbytes);
err = skcipher_walk_done(&walk, nbytes);
}
padlock_store_cword(&ctx->cword.encrypt);
......@@ -390,48 +395,41 @@ static int ecb_aes_decrypt(struct blkcipher_desc *desc,
return err;
}
static struct crypto_alg ecb_aes_alg = {
.cra_name = "ecb(aes)",
.cra_driver_name = "ecb-aes-padlock",
.cra_priority = PADLOCK_COMPOSITE_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
.cra_blocksize = AES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct aes_ctx),
.cra_alignmask = PADLOCK_ALIGNMENT - 1,
.cra_type = &crypto_blkcipher_type,
.cra_module = THIS_MODULE,
.cra_u = {
.blkcipher = {
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.setkey = aes_set_key,
.encrypt = ecb_aes_encrypt,
.decrypt = ecb_aes_decrypt,
}
}
static struct skcipher_alg ecb_aes_alg = {
.base.cra_name = "ecb(aes)",
.base.cra_driver_name = "ecb-aes-padlock",
.base.cra_priority = PADLOCK_COMPOSITE_PRIORITY,
.base.cra_blocksize = AES_BLOCK_SIZE,
.base.cra_ctxsize = sizeof(struct aes_ctx),
.base.cra_alignmask = PADLOCK_ALIGNMENT - 1,
.base.cra_module = THIS_MODULE,
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.setkey = aes_set_key_skcipher,
.encrypt = ecb_aes_encrypt,
.decrypt = ecb_aes_decrypt,
};
static int cbc_aes_encrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
static int cbc_aes_encrypt(struct skcipher_request *req)
{
struct aes_ctx *ctx = blk_aes_ctx(desc->tfm);
struct blkcipher_walk walk;
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
struct aes_ctx *ctx = skcipher_aes_ctx(tfm);
struct skcipher_walk walk;
unsigned int nbytes;
int err;
padlock_reset_key(&ctx->cword.encrypt);
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt(desc, &walk);
err = skcipher_walk_virt(&walk, req, false);
while ((nbytes = walk.nbytes)) {
while ((nbytes = walk.nbytes) != 0) {
u8 *iv = padlock_xcrypt_cbc(walk.src.virt.addr,
walk.dst.virt.addr, ctx->E,
walk.iv, &ctx->cword.encrypt,
nbytes / AES_BLOCK_SIZE);
memcpy(walk.iv, iv, AES_BLOCK_SIZE);
nbytes &= AES_BLOCK_SIZE - 1;
err = blkcipher_walk_done(desc, &walk, nbytes);
err = skcipher_walk_done(&walk, nbytes);
}
padlock_store_cword(&ctx->cword.decrypt);
......@@ -439,25 +437,24 @@ static int cbc_aes_encrypt(struct blkcipher_desc *desc,
return err;
}
static int cbc_aes_decrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
static int cbc_aes_decrypt(struct skcipher_request *req)
{
struct aes_ctx *ctx = blk_aes_ctx(desc->tfm);
struct blkcipher_walk walk;
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
struct aes_ctx *ctx = skcipher_aes_ctx(tfm);
struct skcipher_walk walk;
unsigned int nbytes;
int err;
padlock_reset_key(&ctx->cword.encrypt);
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt(desc, &walk);
err = skcipher_walk_virt(&walk, req, false);
while ((nbytes = walk.nbytes)) {
while ((nbytes = walk.nbytes) != 0) {
padlock_xcrypt_cbc(walk.src.virt.addr, walk.dst.virt.addr,
ctx->D, walk.iv, &ctx->cword.decrypt,
nbytes / AES_BLOCK_SIZE);
nbytes &= AES_BLOCK_SIZE - 1;
err = blkcipher_walk_done(desc, &walk, nbytes);
err = skcipher_walk_done(&walk, nbytes);
}
padlock_store_cword(&ctx->cword.encrypt);
......@@ -465,26 +462,20 @@ static int cbc_aes_decrypt(struct blkcipher_desc *desc,
return err;
}
static struct crypto_alg cbc_aes_alg = {
.cra_name = "cbc(aes)",
.cra_driver_name = "cbc-aes-padlock",
.cra_priority = PADLOCK_COMPOSITE_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
.cra_blocksize = AES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct aes_ctx),
.cra_alignmask = PADLOCK_ALIGNMENT - 1,
.cra_type = &crypto_blkcipher_type,
.cra_module = THIS_MODULE,
.cra_u = {
.blkcipher = {
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
.setkey = aes_set_key,
.encrypt = cbc_aes_encrypt,
.decrypt = cbc_aes_decrypt,
}
}
static struct skcipher_alg cbc_aes_alg = {
.base.cra_name = "cbc(aes)",
.base.cra_driver_name = "cbc-aes-padlock",
.base.cra_priority = PADLOCK_COMPOSITE_PRIORITY,
.base.cra_blocksize = AES_BLOCK_SIZE,
.base.cra_ctxsize = sizeof(struct aes_ctx),
.base.cra_alignmask = PADLOCK_ALIGNMENT - 1,
.base.cra_module = THIS_MODULE,
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
.setkey = aes_set_key_skcipher,
.encrypt = cbc_aes_encrypt,
.decrypt = cbc_aes_decrypt,
};
static const struct x86_cpu_id padlock_cpu_id[] = {
......@@ -506,13 +497,13 @@ static int __init padlock_init(void)
return -ENODEV;
}
if ((ret = crypto_register_alg(&aes_alg)))
if ((ret = crypto_register_alg(&aes_alg)) != 0)
goto aes_err;
if ((ret = crypto_register_alg(&ecb_aes_alg)))
if ((ret = crypto_register_skcipher(&ecb_aes_alg)) != 0)
goto ecb_aes_err;
if ((ret = crypto_register_alg(&cbc_aes_alg)))
if ((ret = crypto_register_skcipher(&cbc_aes_alg)) != 0)
goto cbc_aes_err;
printk(KERN_NOTICE PFX "Using VIA PadLock ACE for AES algorithm.\n");
......@@ -527,7 +518,7 @@ static int __init padlock_init(void)
return ret;
cbc_aes_err:
crypto_unregister_alg(&ecb_aes_alg);
crypto_unregister_skcipher(&ecb_aes_alg);
ecb_aes_err:
crypto_unregister_alg(&aes_alg);
aes_err:
......@@ -537,8 +528,8 @@ static int __init padlock_init(void)
static void __exit padlock_fini(void)
{
crypto_unregister_alg(&cbc_aes_alg);
crypto_unregister_alg(&ecb_aes_alg);
crypto_unregister_skcipher(&cbc_aes_alg);
crypto_unregister_skcipher(&ecb_aes_alg);
crypto_unregister_alg(&aes_alg);
}
......
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