[CRYPTO] padlock: Added block cipher versions of CBC/ECB
This patch adds block cipher algorithms for cbc(aes) and ecb(aes) for the PadLock device. Once all users to the old cipher type have been converted the old cbc/ecb PadLock operations will be removed. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
parent
db131ef908
commit
28ce728a90
|
|
@ -27,6 +27,7 @@ config CRYPTO_DEV_PADLOCK
|
|||
config CRYPTO_DEV_PADLOCK_AES
|
||||
tristate "PadLock driver for AES algorithm"
|
||||
depends on CRYPTO_DEV_PADLOCK
|
||||
select CRYPTO_BLKCIPHER
|
||||
default m
|
||||
help
|
||||
Use VIA PadLock for AES algorithm.
|
||||
|
|
|
|||
|
|
@ -43,11 +43,11 @@
|
|||
* ---------------------------------------------------------------------------
|
||||
*/
|
||||
|
||||
#include <crypto/algapi.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/crypto.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <asm/byteorder.h>
|
||||
|
|
@ -297,9 +297,9 @@ aes_hw_extkey_available(uint8_t key_len)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static inline struct aes_ctx *aes_ctx(struct crypto_tfm *tfm)
|
||||
static inline struct aes_ctx *aes_ctx_common(void *ctx)
|
||||
{
|
||||
unsigned long addr = (unsigned long)crypto_tfm_ctx(tfm);
|
||||
unsigned long addr = (unsigned long)ctx;
|
||||
unsigned long align = PADLOCK_ALIGNMENT;
|
||||
|
||||
if (align <= crypto_tfm_ctx_alignment())
|
||||
|
|
@ -307,6 +307,16 @@ static inline struct aes_ctx *aes_ctx(struct crypto_tfm *tfm)
|
|||
return (struct aes_ctx *)ALIGN(addr, align);
|
||||
}
|
||||
|
||||
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)
|
||||
{
|
||||
return aes_ctx_common(crypto_blkcipher_ctx(tfm));
|
||||
}
|
||||
|
||||
static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
|
||||
unsigned int key_len)
|
||||
{
|
||||
|
|
@ -507,6 +517,141 @@ static struct crypto_alg aes_alg = {
|
|||
}
|
||||
};
|
||||
|
||||
static int ecb_aes_encrypt(struct blkcipher_desc *desc,
|
||||
struct scatterlist *dst, struct scatterlist *src,
|
||||
unsigned int nbytes)
|
||||
{
|
||||
struct aes_ctx *ctx = blk_aes_ctx(desc->tfm);
|
||||
struct blkcipher_walk walk;
|
||||
int err;
|
||||
|
||||
blkcipher_walk_init(&walk, dst, src, nbytes);
|
||||
err = blkcipher_walk_virt(desc, &walk);
|
||||
|
||||
while ((nbytes = walk.nbytes)) {
|
||||
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);
|
||||
}
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int ecb_aes_decrypt(struct blkcipher_desc *desc,
|
||||
struct scatterlist *dst, struct scatterlist *src,
|
||||
unsigned int nbytes)
|
||||
{
|
||||
struct aes_ctx *ctx = blk_aes_ctx(desc->tfm);
|
||||
struct blkcipher_walk walk;
|
||||
int err;
|
||||
|
||||
blkcipher_walk_init(&walk, dst, src, nbytes);
|
||||
err = blkcipher_walk_virt(desc, &walk);
|
||||
|
||||
while ((nbytes = walk.nbytes)) {
|
||||
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);
|
||||
}
|
||||
|
||||
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_list = LIST_HEAD_INIT(ecb_aes_alg.cra_list),
|
||||
.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 int cbc_aes_encrypt(struct blkcipher_desc *desc,
|
||||
struct scatterlist *dst, struct scatterlist *src,
|
||||
unsigned int nbytes)
|
||||
{
|
||||
struct aes_ctx *ctx = blk_aes_ctx(desc->tfm);
|
||||
struct blkcipher_walk walk;
|
||||
int err;
|
||||
|
||||
blkcipher_walk_init(&walk, dst, src, nbytes);
|
||||
err = blkcipher_walk_virt(desc, &walk);
|
||||
|
||||
while ((nbytes = walk.nbytes)) {
|
||||
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);
|
||||
}
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int cbc_aes_decrypt(struct blkcipher_desc *desc,
|
||||
struct scatterlist *dst, struct scatterlist *src,
|
||||
unsigned int nbytes)
|
||||
{
|
||||
struct aes_ctx *ctx = blk_aes_ctx(desc->tfm);
|
||||
struct blkcipher_walk walk;
|
||||
int err;
|
||||
|
||||
blkcipher_walk_init(&walk, dst, src, nbytes);
|
||||
err = blkcipher_walk_virt(desc, &walk);
|
||||
|
||||
while ((nbytes = walk.nbytes)) {
|
||||
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);
|
||||
}
|
||||
|
||||
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_list = LIST_HEAD_INIT(cbc_aes_alg.cra_list),
|
||||
.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 int __init padlock_init(void)
|
||||
{
|
||||
int ret;
|
||||
|
|
@ -522,18 +667,33 @@ static int __init padlock_init(void)
|
|||
}
|
||||
|
||||
gen_tabs();
|
||||
if ((ret = crypto_register_alg(&aes_alg))) {
|
||||
printk(KERN_ERR PFX "VIA PadLock AES initialization failed.\n");
|
||||
return ret;
|
||||
}
|
||||
if ((ret = crypto_register_alg(&aes_alg)))
|
||||
goto aes_err;
|
||||
|
||||
if ((ret = crypto_register_alg(&ecb_aes_alg)))
|
||||
goto ecb_aes_err;
|
||||
|
||||
if ((ret = crypto_register_alg(&cbc_aes_alg)))
|
||||
goto cbc_aes_err;
|
||||
|
||||
printk(KERN_NOTICE PFX "Using VIA PadLock ACE for AES algorithm.\n");
|
||||
|
||||
out:
|
||||
return ret;
|
||||
|
||||
cbc_aes_err:
|
||||
crypto_unregister_alg(&ecb_aes_alg);
|
||||
ecb_aes_err:
|
||||
crypto_unregister_alg(&aes_alg);
|
||||
aes_err:
|
||||
printk(KERN_ERR PFX "VIA PadLock AES initialization failed.\n");
|
||||
goto out;
|
||||
}
|
||||
|
||||
static void __exit padlock_fini(void)
|
||||
{
|
||||
crypto_unregister_alg(&cbc_aes_alg);
|
||||
crypto_unregister_alg(&ecb_aes_alg);
|
||||
crypto_unregister_alg(&aes_alg);
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -18,5 +18,6 @@
|
|||
#define PFX "padlock: "
|
||||
|
||||
#define PADLOCK_CRA_PRIORITY 300
|
||||
#define PADLOCK_COMPOSITE_PRIORITY 400
|
||||
|
||||
#endif /* _CRYPTO_PADLOCK_H */
|
||||
|
|
|
|||
Loading…
Reference in New Issue