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crypto: inside-secure - Replace generic aes with libaes

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Commit 363a90c2d5 ("crypto: safexcel/aes - switch to
library version of key expansion routine") removed
CRYPTO_AES in the config. However, some portions of codes
still rely on generic AES cipher (e.g. refer to
safexcel_aead_gcm_cra_init(), safexcel_xcbcmac_cra_init()).
This causes transform allocation failure for those algos,
if CRYPTO_AES is not manually enabled.

To resolve that, we replace all existing AES cipher
dependent codes with their AES library counterpart.

Fixes: 363a90c2d5 ("crypto: safexcel/aes - switch to library version of key expansion routine")
Signed-off-by: Peter Harliman Liem <pliem@maxlinear.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Peter Harliman Liem 2022-09-13 16:03:48 +08:00 committed by Herbert Xu
parent 49186a7d9e
commit 320406cb60
2 changed files with 21 additions and 54 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/crypto/inside-secure/safexcel_cipher.c
View File

@ -63,7 +63,6 @@ struct safexcel_cipher_ctx {
u32 hash_alg;
u32 state_sz;
struct crypto_cipher *hkaes;
struct crypto_aead *fback;
};
@ -2607,15 +2606,8 @@ static int safexcel_aead_gcm_setkey(struct crypto_aead *ctfm, const u8 *key,
ctx->key_len = len;
/* Compute hash key by encrypting zeroes with cipher key */
crypto_cipher_clear_flags(ctx->hkaes, CRYPTO_TFM_REQ_MASK);
crypto_cipher_set_flags(ctx->hkaes, crypto_aead_get_flags(ctfm) &
CRYPTO_TFM_REQ_MASK);
ret = crypto_cipher_setkey(ctx->hkaes, key, len);
if (ret)
return ret;
memset(hashkey, 0, AES_BLOCK_SIZE);
crypto_cipher_encrypt_one(ctx->hkaes, (u8 *)hashkey, (u8 *)hashkey);
aes_encrypt(&aes, (u8 *)hashkey, (u8 *)hashkey);
if (priv->flags & EIP197_TRC_CACHE && ctx->base.ctxr_dma) {
for (i = 0; i < AES_BLOCK_SIZE / sizeof(u32); i++) {
@ -2644,15 +2636,11 @@ static int safexcel_aead_gcm_cra_init(struct crypto_tfm *tfm)
ctx->xcm = EIP197_XCM_MODE_GCM;
ctx->mode = CONTEXT_CONTROL_CRYPTO_MODE_XCM; /* override default */
ctx->hkaes = crypto_alloc_cipher("aes", 0, 0);
return PTR_ERR_OR_ZERO(ctx->hkaes);
return 0;
}
static void safexcel_aead_gcm_cra_exit(struct crypto_tfm *tfm)
{
struct safexcel_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
crypto_free_cipher(ctx->hkaes);
safexcel_aead_cra_exit(tfm);
}

59
drivers/crypto/inside-secure/safexcel_hash.c
View File

@ -30,7 +30,7 @@ struct safexcel_ahash_ctx {
bool fb_init_done;
bool fb_do_setkey;
struct crypto_cipher *kaes;
struct crypto_aes_ctx *aes;
struct crypto_ahash *fback;
struct crypto_shash *shpre;
struct shash_desc *shdesc;
@ -824,7 +824,7 @@ static int safexcel_ahash_final(struct ahash_request *areq)
result[i] = swab32(ctx->base.ipad.word[i + 4]);
}
areq->result[0] ^= 0x80; // 10- padding
crypto_cipher_encrypt_one(ctx->kaes, areq->result, areq->result);
aes_encrypt(ctx->aes, areq->result, areq->result);
return 0;
} else if (unlikely(req->hmac &&
(req->len == req->block_sz) &&
@ -2083,37 +2083,26 @@ static int safexcel_xcbcmac_setkey(struct crypto_ahash *tfm, const u8 *key,
unsigned int len)
{
struct safexcel_ahash_ctx *ctx = crypto_tfm_ctx(crypto_ahash_tfm(tfm));
struct crypto_aes_ctx aes;
u32 key_tmp[3 * AES_BLOCK_SIZE / sizeof(u32)];
int ret, i;
ret = aes_expandkey(&aes, key, len);
ret = aes_expandkey(ctx->aes, key, len);
if (ret)
return ret;
/* precompute the XCBC key material */
crypto_cipher_clear_flags(ctx->kaes, CRYPTO_TFM_REQ_MASK);
crypto_cipher_set_flags(ctx->kaes, crypto_ahash_get_flags(tfm) &
CRYPTO_TFM_REQ_MASK);
ret = crypto_cipher_setkey(ctx->kaes, key, len);
if (ret)
return ret;
crypto_cipher_encrypt_one(ctx->kaes, (u8 *)key_tmp + 2 * AES_BLOCK_SIZE,
"\x1\x1\x1\x1\x1\x1\x1\x1\x1\x1\x1\x1\x1\x1\x1\x1");
crypto_cipher_encrypt_one(ctx->kaes, (u8 *)key_tmp,
"\x2\x2\x2\x2\x2\x2\x2\x2\x2\x2\x2\x2\x2\x2\x2\x2");
crypto_cipher_encrypt_one(ctx->kaes, (u8 *)key_tmp + AES_BLOCK_SIZE,
"\x3\x3\x3\x3\x3\x3\x3\x3\x3\x3\x3\x3\x3\x3\x3\x3");
aes_encrypt(ctx->aes, (u8 *)key_tmp + 2 * AES_BLOCK_SIZE,
"\x1\x1\x1\x1\x1\x1\x1\x1\x1\x1\x1\x1\x1\x1\x1\x1");
aes_encrypt(ctx->aes, (u8 *)key_tmp,
"\x2\x2\x2\x2\x2\x2\x2\x2\x2\x2\x2\x2\x2\x2\x2\x2");
aes_encrypt(ctx->aes, (u8 *)key_tmp + AES_BLOCK_SIZE,
"\x3\x3\x3\x3\x3\x3\x3\x3\x3\x3\x3\x3\x3\x3\x3\x3");
for (i = 0; i < 3 * AES_BLOCK_SIZE / sizeof(u32); i++)
ctx->base.ipad.word[i] = swab32(key_tmp[i]);
crypto_cipher_clear_flags(ctx->kaes, CRYPTO_TFM_REQ_MASK);
crypto_cipher_set_flags(ctx->kaes, crypto_ahash_get_flags(tfm) &
CRYPTO_TFM_REQ_MASK);
ret = crypto_cipher_setkey(ctx->kaes,
(u8 *)key_tmp + 2 * AES_BLOCK_SIZE,
AES_MIN_KEY_SIZE);
ret = aes_expandkey(ctx->aes,
(u8 *)key_tmp + 2 * AES_BLOCK_SIZE,
AES_MIN_KEY_SIZE);
if (ret)
return ret;
@ -2121,7 +2110,6 @@ static int safexcel_xcbcmac_setkey(struct crypto_ahash *tfm, const u8 *key,
ctx->key_sz = AES_MIN_KEY_SIZE + 2 * AES_BLOCK_SIZE;
ctx->cbcmac = false;
memzero_explicit(&aes, sizeof(aes));
return 0;
}
@ -2130,15 +2118,15 @@ static int safexcel_xcbcmac_cra_init(struct crypto_tfm *tfm)
struct safexcel_ahash_ctx *ctx = crypto_tfm_ctx(tfm);
safexcel_ahash_cra_init(tfm);
ctx->kaes = crypto_alloc_cipher("aes", 0, 0);
return PTR_ERR_OR_ZERO(ctx->kaes);
ctx->aes = kmalloc(sizeof(*ctx->aes), GFP_KERNEL);
return PTR_ERR_OR_ZERO(ctx->aes);
}
static void safexcel_xcbcmac_cra_exit(struct crypto_tfm *tfm)
{
struct safexcel_ahash_ctx *ctx = crypto_tfm_ctx(tfm);
crypto_free_cipher(ctx->kaes);
kfree(ctx->aes);
safexcel_ahash_cra_exit(tfm);
}
@ -2178,31 +2166,23 @@ static int safexcel_cmac_setkey(struct crypto_ahash *tfm, const u8 *key,
unsigned int len)
{
struct safexcel_ahash_ctx *ctx = crypto_tfm_ctx(crypto_ahash_tfm(tfm));
struct crypto_aes_ctx aes;
__be64 consts[4];
u64 _const[2];
u8 msb_mask, gfmask;
int ret, i;
ret = aes_expandkey(&aes, key, len);
/* precompute the CMAC key material */
ret = aes_expandkey(ctx->aes, key, len);
if (ret)
return ret;
for (i = 0; i < len / sizeof(u32); i++)
ctx->base.ipad.word[i + 8] = swab32(aes.key_enc[i]);
/* precompute the CMAC key material */
crypto_cipher_clear_flags(ctx->kaes, CRYPTO_TFM_REQ_MASK);
crypto_cipher_set_flags(ctx->kaes, crypto_ahash_get_flags(tfm) &
CRYPTO_TFM_REQ_MASK);
ret = crypto_cipher_setkey(ctx->kaes, key, len);
if (ret)
return ret;
ctx->base.ipad.word[i + 8] = swab32(ctx->aes->key_enc[i]);
/* code below borrowed from crypto/cmac.c */
/* encrypt the zero block */
memset(consts, 0, AES_BLOCK_SIZE);
crypto_cipher_encrypt_one(ctx->kaes, (u8 *)consts, (u8 *)consts);
aes_encrypt(ctx->aes, (u8 *)consts, (u8 *)consts);
gfmask = 0x87;
_const[0] = be64_to_cpu(consts[1]);
@ -2234,7 +2214,6 @@ static int safexcel_cmac_setkey(struct crypto_ahash *tfm, const u8 *key,
}
ctx->cbcmac = false;
memzero_explicit(&aes, sizeof(aes));
return 0;
}