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Diffstat (limited to 'arch/arm64/crypto/aes-neonbs-glue.c')
-rw-r--r--arch/arm64/crypto/aes-neonbs-glue.c97
1 files changed, 46 insertions, 51 deletions
diff --git a/arch/arm64/crypto/aes-neonbs-glue.c b/arch/arm64/crypto/aes-neonbs-glue.c
index 8df6ad8cb09d..bac4cabef607 100644
--- a/arch/arm64/crypto/aes-neonbs-glue.c
+++ b/arch/arm64/crypto/aes-neonbs-glue.c
@@ -34,7 +34,7 @@ asmlinkage void aesbs_cbc_decrypt(u8 out[], u8 const in[], u8 const rk[],
int rounds, int blocks, u8 iv[]);
asmlinkage void aesbs_ctr_encrypt(u8 out[], u8 const in[], u8 const rk[],
- int rounds, int blocks, u8 iv[], u8 final[]);
+ int rounds, int blocks, u8 iv[]);
asmlinkage void aesbs_xts_encrypt(u8 out[], u8 const in[], u8 const rk[],
int rounds, int blocks, u8 iv[]);
@@ -46,6 +46,8 @@ asmlinkage void neon_aes_ecb_encrypt(u8 out[], u8 const in[], u32 const rk[],
int rounds, int blocks);
asmlinkage void neon_aes_cbc_encrypt(u8 out[], u8 const in[], u32 const rk[],
int rounds, int blocks, u8 iv[]);
+asmlinkage void neon_aes_ctr_encrypt(u8 out[], u8 const in[], u32 const rk[],
+ int rounds, int bytes, u8 ctr[]);
asmlinkage void neon_aes_xts_encrypt(u8 out[], u8 const in[],
u32 const rk1[], int rounds, int bytes,
u32 const rk2[], u8 iv[], int first);
@@ -58,7 +60,7 @@ struct aesbs_ctx {
int rounds;
} __aligned(AES_BLOCK_SIZE);
-struct aesbs_cbc_ctx {
+struct aesbs_cbc_ctr_ctx {
struct aesbs_ctx key;
u32 enc[AES_MAX_KEYLENGTH_U32];
};
@@ -128,10 +130,10 @@ static int ecb_decrypt(struct skcipher_request *req)
return __ecb_crypt(req, aesbs_ecb_decrypt);
}
-static int aesbs_cbc_setkey(struct crypto_skcipher *tfm, const u8 *in_key,
+static int aesbs_cbc_ctr_setkey(struct crypto_skcipher *tfm, const u8 *in_key,
unsigned int key_len)
{
- struct aesbs_cbc_ctx *ctx = crypto_skcipher_ctx(tfm);
+ struct aesbs_cbc_ctr_ctx *ctx = crypto_skcipher_ctx(tfm);
struct crypto_aes_ctx rk;
int err;
@@ -154,7 +156,7 @@ static int aesbs_cbc_setkey(struct crypto_skcipher *tfm, const u8 *in_key,
static int cbc_encrypt(struct skcipher_request *req)
{
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
- struct aesbs_cbc_ctx *ctx = crypto_skcipher_ctx(tfm);
+ struct aesbs_cbc_ctr_ctx *ctx = crypto_skcipher_ctx(tfm);
struct skcipher_walk walk;
int err;
@@ -177,7 +179,7 @@ static int cbc_encrypt(struct skcipher_request *req)
static int cbc_decrypt(struct skcipher_request *req)
{
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
- struct aesbs_cbc_ctx *ctx = crypto_skcipher_ctx(tfm);
+ struct aesbs_cbc_ctr_ctx *ctx = crypto_skcipher_ctx(tfm);
struct skcipher_walk walk;
int err;
@@ -205,40 +207,32 @@ static int cbc_decrypt(struct skcipher_request *req)
static int ctr_encrypt(struct skcipher_request *req)
{
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
- struct aesbs_ctx *ctx = crypto_skcipher_ctx(tfm);
+ struct aesbs_cbc_ctr_ctx *ctx = crypto_skcipher_ctx(tfm);
struct skcipher_walk walk;
- u8 buf[AES_BLOCK_SIZE];
int err;
err = skcipher_walk_virt(&walk, req, false);
while (walk.nbytes > 0) {
- unsigned int blocks = walk.nbytes / AES_BLOCK_SIZE;
- u8 *final = (walk.total % AES_BLOCK_SIZE) ? buf : NULL;
-
- if (walk.nbytes < walk.total) {
- blocks = round_down(blocks,
- walk.stride / AES_BLOCK_SIZE);
- final = NULL;
- }
+ int blocks = (walk.nbytes / AES_BLOCK_SIZE) & ~7;
+ int nbytes = walk.nbytes % (8 * AES_BLOCK_SIZE);
+ const u8 *src = walk.src.virt.addr;
+ u8 *dst = walk.dst.virt.addr;
kernel_neon_begin();
- aesbs_ctr_encrypt(walk.dst.virt.addr, walk.src.virt.addr,
- ctx->rk, ctx->rounds, blocks, walk.iv, final);
- kernel_neon_end();
-
- if (final) {
- u8 *dst = walk.dst.virt.addr + blocks * AES_BLOCK_SIZE;
- u8 *src = walk.src.virt.addr + blocks * AES_BLOCK_SIZE;
-
- crypto_xor_cpy(dst, src, final,
- walk.total % AES_BLOCK_SIZE);
-
- err = skcipher_walk_done(&walk, 0);
- break;
+ if (blocks >= 8) {
+ aesbs_ctr_encrypt(dst, src, ctx->key.rk, ctx->key.rounds,
+ blocks, walk.iv);
+ dst += blocks * AES_BLOCK_SIZE;
+ src += blocks * AES_BLOCK_SIZE;
}
- err = skcipher_walk_done(&walk,
- walk.nbytes - blocks * AES_BLOCK_SIZE);
+ if (nbytes && walk.nbytes == walk.total) {
+ neon_aes_ctr_encrypt(dst, src, ctx->enc, ctx->key.rounds,
+ nbytes, walk.iv);
+ nbytes = 0;
+ }
+ kernel_neon_end();
+ err = skcipher_walk_done(&walk, nbytes);
}
return err;
}
@@ -308,23 +302,18 @@ static int __xts_crypt(struct skcipher_request *req, bool encrypt,
return err;
while (walk.nbytes >= AES_BLOCK_SIZE) {
- unsigned int blocks = walk.nbytes / AES_BLOCK_SIZE;
-
- if (walk.nbytes < walk.total || walk.nbytes % AES_BLOCK_SIZE)
- blocks = round_down(blocks,
- walk.stride / AES_BLOCK_SIZE);
-
+ int blocks = (walk.nbytes / AES_BLOCK_SIZE) & ~7;
out = walk.dst.virt.addr;
in = walk.src.virt.addr;
nbytes = walk.nbytes;
kernel_neon_begin();
- if (likely(blocks > 6)) { /* plain NEON is faster otherwise */
- if (first)
+ if (blocks >= 8) {
+ if (first == 1)
neon_aes_ecb_encrypt(walk.iv, walk.iv,
ctx->twkey,
ctx->key.rounds, 1);
- first = 0;
+ first = 2;
fn(out, in, ctx->key.rk, ctx->key.rounds, blocks,
walk.iv);
@@ -333,10 +322,17 @@ static int __xts_crypt(struct skcipher_request *req, bool encrypt,
in += blocks * AES_BLOCK_SIZE;
nbytes -= blocks * AES_BLOCK_SIZE;
}
-
- if (walk.nbytes == walk.total && nbytes > 0)
- goto xts_tail;
-
+ if (walk.nbytes == walk.total && nbytes > 0) {
+ if (encrypt)
+ neon_aes_xts_encrypt(out, in, ctx->cts.key_enc,
+ ctx->key.rounds, nbytes,
+ ctx->twkey, walk.iv, first);
+ else
+ neon_aes_xts_decrypt(out, in, ctx->cts.key_dec,
+ ctx->key.rounds, nbytes,
+ ctx->twkey, walk.iv, first);
+ nbytes = first = 0;
+ }
kernel_neon_end();
err = skcipher_walk_done(&walk, nbytes);
}
@@ -361,13 +357,12 @@ static int __xts_crypt(struct skcipher_request *req, bool encrypt,
nbytes = walk.nbytes;
kernel_neon_begin();
-xts_tail:
if (encrypt)
neon_aes_xts_encrypt(out, in, ctx->cts.key_enc, ctx->key.rounds,
- nbytes, ctx->twkey, walk.iv, first ?: 2);
+ nbytes, ctx->twkey, walk.iv, first);
else
neon_aes_xts_decrypt(out, in, ctx->cts.key_dec, ctx->key.rounds,
- nbytes, ctx->twkey, walk.iv, first ?: 2);
+ nbytes, ctx->twkey, walk.iv, first);
kernel_neon_end();
return skcipher_walk_done(&walk, 0);
@@ -402,14 +397,14 @@ static struct skcipher_alg aes_algs[] = { {
.base.cra_driver_name = "cbc-aes-neonbs",
.base.cra_priority = 250,
.base.cra_blocksize = AES_BLOCK_SIZE,
- .base.cra_ctxsize = sizeof(struct aesbs_cbc_ctx),
+ .base.cra_ctxsize = sizeof(struct aesbs_cbc_ctr_ctx),
.base.cra_module = THIS_MODULE,
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.walksize = 8 * AES_BLOCK_SIZE,
.ivsize = AES_BLOCK_SIZE,
- .setkey = aesbs_cbc_setkey,
+ .setkey = aesbs_cbc_ctr_setkey,
.encrypt = cbc_encrypt,
.decrypt = cbc_decrypt,
}, {
@@ -417,7 +412,7 @@ static struct skcipher_alg aes_algs[] = { {
.base.cra_driver_name = "ctr-aes-neonbs",
.base.cra_priority = 250,
.base.cra_blocksize = 1,
- .base.cra_ctxsize = sizeof(struct aesbs_ctx),
+ .base.cra_ctxsize = sizeof(struct aesbs_cbc_ctr_ctx),
.base.cra_module = THIS_MODULE,
.min_keysize = AES_MIN_KEY_SIZE,
@@ -425,7 +420,7 @@ static struct skcipher_alg aes_algs[] = { {
.chunksize = AES_BLOCK_SIZE,
.walksize = 8 * AES_BLOCK_SIZE,
.ivsize = AES_BLOCK_SIZE,
- .setkey = aesbs_setkey,
+ .setkey = aesbs_cbc_ctr_setkey,
.encrypt = ctr_encrypt,
.decrypt = ctr_encrypt,
}, {
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-14 11:47:33 +0300