hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

crypto: arm64/aes-blk - expose AES-CTR as synchronous cipher as well 

In addition to wrapping the AES-CTR cipher into the async SIMD wrapper,
which exposes it as an async skcipher that defers processing to process
context, expose our AES-CTR implementation directly as a synchronous cipher
as well, but with a lower priority.

This makes the AES-CTR transform usable in places where synchronous
transforms are required, such as the MAC802.11 encryption code, which
executes in sotfirq context, where SIMD processing is allowed on arm64.
Users of the async transform will keep the existing behavior.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ard Biesheuvel 2017-01-11 16:41:51 +00:00 committed by Herbert Xu
parent afaf712e99
commit 293614ce3e
1 changed files with 23 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
arch/arm64/crypto/aes-glue.c
View File

@ -325,6 +325,23 @@ static struct skcipher_alg aes_algs[] = { {
.setkey = skcipher_aes_setkey, .setkey = skcipher_aes_setkey,
.encrypt = ctr_encrypt, .encrypt = ctr_encrypt,
.decrypt = ctr_encrypt, .decrypt = ctr_encrypt,
}, {
.base = {
.cra_name = "ctr(aes)",
.cra_driver_name = "ctr-aes-" MODE,
.cra_priority = PRIO - 1,
.cra_blocksize = 1,
.cra_ctxsize = sizeof(struct crypto_aes_ctx),
.cra_alignmask = 7,
.cra_module = THIS_MODULE,
},
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
.chunksize = AES_BLOCK_SIZE,
.setkey = skcipher_aes_setkey,
.encrypt = ctr_encrypt,
.decrypt = ctr_encrypt,
}, { }, {
.base = { .base = {
.cra_name = "__xts(aes)", .cra_name = "__xts(aes)",
@ -350,8 +367,9 @@ static void aes_exit(void)
{ {
int i; int i;
for (i = 0; i < ARRAY_SIZE(aes_simd_algs) && aes_simd_algs[i]; i++) for (i = 0; i < ARRAY_SIZE(aes_simd_algs); i++)
simd_skcipher_free(aes_simd_algs[i]); if (aes_simd_algs[i])
simd_skcipher_free(aes_simd_algs[i]);
crypto_unregister_skciphers(aes_algs, ARRAY_SIZE(aes_algs)); crypto_unregister_skciphers(aes_algs, ARRAY_SIZE(aes_algs));
} }
@ -370,6 +388,9 @@ static int __init aes_init(void)
return err; return err;
for (i = 0; i < ARRAY_SIZE(aes_algs); i++) { for (i = 0; i < ARRAY_SIZE(aes_algs); i++) {
if (!(aes_algs[i].base.cra_flags & CRYPTO_ALG_INTERNAL))
continue;
algname = aes_algs[i].base.cra_name + 2; algname = aes_algs[i].base.cra_name + 2;
drvname = aes_algs[i].base.cra_driver_name + 2; drvname = aes_algs[i].base.cra_driver_name + 2;
basename = aes_algs[i].base.cra_driver_name; basename = aes_algs[i].base.cra_driver_name;