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crypto: nx - convert AES-CTR to skcipher API 

Convert the PowerPC Nest (NX) implementation of AES-CTR from the
deprecated "blkcipher" API to the "skcipher" API.  This is needed in
order for the blkcipher API to be removed.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers 2019-10-12 21:39:18 -07:00 committed by Herbert Xu
parent c1e9c386c9
commit 4ba802980c
3 changed files with 46 additions and 67 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

84
drivers/crypto/nx/nx-aes-ctr.c
View File

@ -19,11 +19,11 @@
#include "nx.h"
static int ctr_aes_nx_set_key(struct crypto_tfm *tfm,
const u8 *in_key,
unsigned int key_len)
static int ctr_aes_nx_set_key(struct crypto_skcipher *tfm,
const u8 *in_key,
unsigned int key_len)
{
struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(tfm);
struct nx_crypto_ctx *nx_ctx = crypto_skcipher_ctx(tfm);
struct nx_csbcpb *csbcpb = nx_ctx->csbcpb;
nx_ctx_init(nx_ctx, HCOP_FC_AES);
@ -51,11 +51,11 @@ static int ctr_aes_nx_set_key(struct crypto_tfm *tfm,
return 0;
}
static int ctr3686_aes_nx_set_key(struct crypto_tfm *tfm,
const u8 *in_key,
unsigned int key_len)
static int ctr3686_aes_nx_set_key(struct crypto_skcipher *tfm,
const u8 *in_key,
unsigned int key_len)
{
struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(tfm);
struct nx_crypto_ctx *nx_ctx = crypto_skcipher_ctx(tfm);
if (key_len < CTR_RFC3686_NONCE_SIZE)
return -EINVAL;
@ -69,12 +69,10 @@ static int ctr3686_aes_nx_set_key(struct crypto_tfm *tfm,
return ctr_aes_nx_set_key(tfm, in_key, key_len);
}
static int ctr_aes_nx_crypt(struct blkcipher_desc *desc,
struct scatterlist *dst,
struct scatterlist *src,
unsigned int nbytes)
static int ctr_aes_nx_crypt(struct skcipher_request *req, u8 *iv)
{
struct nx_crypto_ctx *nx_ctx = crypto_blkcipher_ctx(desc->tfm);
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
struct nx_crypto_ctx *nx_ctx = crypto_skcipher_ctx(tfm);
struct nx_csbcpb *csbcpb = nx_ctx->csbcpb;
unsigned long irq_flags;
unsigned int processed = 0, to_process;
@ -83,9 +81,9 @@ static int ctr_aes_nx_crypt(struct blkcipher_desc *desc,
spin_lock_irqsave(&nx_ctx->lock, irq_flags);
do {
to_process = nbytes - processed;
to_process = req->cryptlen - processed;
rc = nx_build_sg_lists(nx_ctx, desc->info, dst, src,
rc = nx_build_sg_lists(nx_ctx, iv, req->dst, req->src,
&to_process, processed,
csbcpb->cpb.aes_ctr.iv);
if (rc)
@ -97,59 +95,51 @@ static int ctr_aes_nx_crypt(struct blkcipher_desc *desc,
}
rc = nx_hcall_sync(nx_ctx, &nx_ctx->op,
desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP);
req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP);
if (rc)
goto out;
memcpy(desc->info, csbcpb->cpb.aes_cbc.cv, AES_BLOCK_SIZE);
memcpy(iv, csbcpb->cpb.aes_cbc.cv, AES_BLOCK_SIZE);
atomic_inc(&(nx_ctx->stats->aes_ops));
atomic64_add(csbcpb->csb.processed_byte_count,
&(nx_ctx->stats->aes_bytes));
processed += to_process;
} while (processed < nbytes);
} while (processed < req->cryptlen);
out:
spin_unlock_irqrestore(&nx_ctx->lock, irq_flags);
return rc;
}
static int ctr3686_aes_nx_crypt(struct blkcipher_desc *desc,
struct scatterlist *dst,
struct scatterlist *src,
unsigned int nbytes)
static int ctr3686_aes_nx_crypt(struct skcipher_request *req)
{
struct nx_crypto_ctx *nx_ctx = crypto_blkcipher_ctx(desc->tfm);
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
struct nx_crypto_ctx *nx_ctx = crypto_skcipher_ctx(tfm);
u8 iv[16];
memcpy(iv, nx_ctx->priv.ctr.nonce, CTR_RFC3686_IV_SIZE);
memcpy(iv + CTR_RFC3686_NONCE_SIZE,
desc->info, CTR_RFC3686_IV_SIZE);
memcpy(iv + CTR_RFC3686_NONCE_SIZE, req->iv, CTR_RFC3686_IV_SIZE);
iv[12] = iv[13] = iv[14] = 0;
iv[15] = 1;
desc->info = iv;
return ctr_aes_nx_crypt(desc, dst, src, nbytes);
return ctr_aes_nx_crypt(req, iv);
}
struct crypto_alg nx_ctr3686_aes_alg = {
.cra_name = "rfc3686(ctr(aes))",
.cra_driver_name = "rfc3686-ctr-aes-nx",
.cra_priority = 300,
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
.cra_blocksize = 1,
.cra_ctxsize = sizeof(struct nx_crypto_ctx),
.cra_type = &crypto_blkcipher_type,
.cra_module = THIS_MODULE,
.cra_init = nx_crypto_ctx_aes_ctr_init,
.cra_exit = nx_crypto_ctx_exit,
.cra_blkcipher = {
.min_keysize = AES_MIN_KEY_SIZE + CTR_RFC3686_NONCE_SIZE,
.max_keysize = AES_MAX_KEY_SIZE + CTR_RFC3686_NONCE_SIZE,
.ivsize = CTR_RFC3686_IV_SIZE,
.setkey = ctr3686_aes_nx_set_key,
.encrypt = ctr3686_aes_nx_crypt,
.decrypt = ctr3686_aes_nx_crypt,
}
struct skcipher_alg nx_ctr3686_aes_alg = {
.base.cra_name = "rfc3686(ctr(aes))",
.base.cra_driver_name = "rfc3686-ctr-aes-nx",
.base.cra_priority = 300,
.base.cra_blocksize = 1,
.base.cra_ctxsize = sizeof(struct nx_crypto_ctx),
.base.cra_module = THIS_MODULE,
.init = nx_crypto_ctx_aes_ctr_init,
.exit = nx_crypto_ctx_skcipher_exit,
.min_keysize = AES_MIN_KEY_SIZE + CTR_RFC3686_NONCE_SIZE,
.max_keysize = AES_MAX_KEY_SIZE + CTR_RFC3686_NONCE_SIZE,
.ivsize = CTR_RFC3686_IV_SIZE,
.setkey = ctr3686_aes_nx_set_key,
.encrypt = ctr3686_aes_nx_crypt,
.decrypt = ctr3686_aes_nx_crypt,
.chunksize = AES_BLOCK_SIZE,
};

25
drivers/crypto/nx/nx.c
View File

@ -511,12 +511,6 @@ static bool nx_check_props(struct device *dev, u32 fc, u32 mode)
return true;
}
static int nx_register_alg(struct crypto_alg *alg, u32 fc, u32 mode)
{
return nx_check_props(&nx_driver.viodev->dev, fc, mode) ?
crypto_register_alg(alg) : 0;
}
static int nx_register_skcipher(struct skcipher_alg *alg, u32 fc, u32 mode)
{
return nx_check_props(&nx_driver.viodev->dev, fc, mode) ?
@ -537,12 +531,6 @@ static int nx_register_shash(struct shash_alg *alg, u32 fc, u32 mode, int slot)
crypto_register_shash(alg) : 0;
}
static void nx_unregister_alg(struct crypto_alg *alg, u32 fc, u32 mode)
{
if (nx_check_props(NULL, fc, mode))
crypto_unregister_alg(alg);
}
static void nx_unregister_skcipher(struct skcipher_alg *alg, u32 fc, u32 mode)
{
if (nx_check_props(NULL, fc, mode))
@ -593,7 +581,8 @@ static int nx_register_algs(void)
if (rc)
goto out_unreg_ecb;
rc = nx_register_alg(&nx_ctr3686_aes_alg, NX_FC_AES, NX_MODE_AES_CTR);
rc = nx_register_skcipher(&nx_ctr3686_aes_alg, NX_FC_AES,
NX_MODE_AES_CTR);
if (rc)
goto out_unreg_cbc;
@ -645,7 +634,7 @@ static int nx_register_algs(void)
out_unreg_gcm:
nx_unregister_aead(&nx_gcm_aes_alg, NX_FC_AES, NX_MODE_AES_GCM);
out_unreg_ctr3686:
nx_unregister_alg(&nx_ctr3686_aes_alg, NX_FC_AES, NX_MODE_AES_CTR);
nx_unregister_skcipher(&nx_ctr3686_aes_alg, NX_FC_AES, NX_MODE_AES_CTR);
out_unreg_cbc:
nx_unregister_skcipher(&nx_cbc_aes_alg, NX_FC_AES, NX_MODE_AES_CBC);
out_unreg_ecb:
@ -716,9 +705,9 @@ int nx_crypto_ctx_aes_gcm_init(struct crypto_aead *tfm)
NX_MODE_AES_GCM);
}
int nx_crypto_ctx_aes_ctr_init(struct crypto_tfm *tfm)
int nx_crypto_ctx_aes_ctr_init(struct crypto_skcipher *tfm)
{
return nx_crypto_ctx_init(crypto_tfm_ctx(tfm), NX_FC_AES,
return nx_crypto_ctx_init(crypto_skcipher_ctx(tfm), NX_FC_AES,
NX_MODE_AES_CTR);
}
@ -815,8 +804,8 @@ static int nx_remove(struct vio_dev *viodev)
NX_FC_AES, NX_MODE_AES_GCM);
nx_unregister_aead(&nx_gcm_aes_alg,
NX_FC_AES, NX_MODE_AES_GCM);
nx_unregister_alg(&nx_ctr3686_aes_alg,
NX_FC_AES, NX_MODE_AES_CTR);
nx_unregister_skcipher(&nx_ctr3686_aes_alg,
NX_FC_AES, NX_MODE_AES_CTR);
nx_unregister_skcipher(&nx_cbc_aes_alg, NX_FC_AES,
NX_MODE_AES_CBC);
nx_unregister_skcipher(&nx_ecb_aes_alg, NX_FC_AES,

4
drivers/crypto/nx/nx.h
View File

@ -145,7 +145,7 @@ struct crypto_aead;
int nx_crypto_ctx_aes_ccm_init(struct crypto_aead *tfm);
int nx_crypto_ctx_aes_gcm_init(struct crypto_aead *tfm);
int nx_crypto_ctx_aes_xcbc_init(struct crypto_tfm *tfm);
int nx_crypto_ctx_aes_ctr_init(struct crypto_tfm *tfm);
int nx_crypto_ctx_aes_ctr_init(struct crypto_skcipher *tfm);
int nx_crypto_ctx_aes_cbc_init(struct crypto_skcipher *tfm);
int nx_crypto_ctx_aes_ecb_init(struct crypto_skcipher *tfm);
int nx_crypto_ctx_sha_init(struct crypto_tfm *tfm);
@ -180,7 +180,7 @@ extern struct skcipher_alg nx_cbc_aes_alg;
extern struct skcipher_alg nx_ecb_aes_alg;
extern struct aead_alg nx_gcm_aes_alg;
extern struct aead_alg nx_gcm4106_aes_alg;
extern struct crypto_alg nx_ctr3686_aes_alg;
extern struct skcipher_alg nx_ctr3686_aes_alg;
extern struct aead_alg nx_ccm_aes_alg;
extern struct aead_alg nx_ccm4309_aes_alg;
extern struct shash_alg nx_shash_aes_xcbc_alg;