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crypto: inside-secure - Reuse code in safexcel_hmac_alg_setkey

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The code in the current implementation of safexcel_hmac_alg_setkey
can be reused by safexcel_cipher.  This patch does just that by
renaming the previous safexcel_hmac_setkey to __safexcel_hmac_setkey.
The now-shared safexcel_hmac_alg_setkey becomes safexcel_hmac_setkey
and a new safexcel_hmac_alg_setkey has been added for use by ahash
transforms.

As a result safexcel_aead_setkey's stack frame has been reduced by
about half in size, or about 512 bytes.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
2020-09-14 14:22:16 +10:00
parent 78cf1c8bfc
commit 63cdd870ab
3 changed files with 41 additions and 47 deletions
Download Patch File Download Diff File Expand all files Collapse all files

36
drivers/crypto/inside-secure/safexcel_cipher.c
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@@ -404,11 +404,11 @@ static int safexcel_aead_setkey(struct crypto_aead *ctfm, const u8 *key,
{
struct crypto_tfm *tfm = crypto_aead_tfm(ctfm);
struct safexcel_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
struct safexcel_ahash_export_state istate, ostate;
struct safexcel_crypto_priv *priv = ctx->base.priv;
struct crypto_authenc_keys keys;
struct crypto_aes_ctx aes;
int err = -EINVAL, i;
const char *alg;
if (unlikely(crypto_authenc_extractkeys(&keys, key, len)))
goto badkey;
@@ -463,53 +463,37 @@ static int safexcel_aead_setkey(struct crypto_aead *ctfm, const u8 *key,
/* Auth key */
switch (ctx->hash_alg) {
case CONTEXT_CONTROL_CRYPTO_ALG_SHA1:
if (safexcel_hmac_setkey("safexcel-sha1", keys.authkey,
keys.authkeylen, &istate, &ostate))
goto badkey;
alg = "safexcel-sha1";
break;
case CONTEXT_CONTROL_CRYPTO_ALG_SHA224:
if (safexcel_hmac_setkey("safexcel-sha224", keys.authkey,
keys.authkeylen, &istate, &ostate))
goto badkey;
alg = "safexcel-sha224";
break;
case CONTEXT_CONTROL_CRYPTO_ALG_SHA256:
if (safexcel_hmac_setkey("safexcel-sha256", keys.authkey,
keys.authkeylen, &istate, &ostate))
goto badkey;
alg = "safexcel-sha256";
break;
case CONTEXT_CONTROL_CRYPTO_ALG_SHA384:
if (safexcel_hmac_setkey("safexcel-sha384", keys.authkey,
keys.authkeylen, &istate, &ostate))
goto badkey;
alg = "safexcel-sha384";
break;
case CONTEXT_CONTROL_CRYPTO_ALG_SHA512:
if (safexcel_hmac_setkey("safexcel-sha512", keys.authkey,
keys.authkeylen, &istate, &ostate))
goto badkey;
alg = "safexcel-sha512";
break;
case CONTEXT_CONTROL_CRYPTO_ALG_SM3:
if (safexcel_hmac_setkey("safexcel-sm3", keys.authkey,
keys.authkeylen, &istate, &ostate))
goto badkey;
alg = "safexcel-sm3";
break;
default:
dev_err(priv->dev, "aead: unsupported hash algorithm\n");
goto badkey;
}
if (priv->flags & EIP197_TRC_CACHE && ctx->base.ctxr_dma &&
(memcmp(&ctx->base.ipad, istate.state, ctx->state_sz) ||
memcmp(&ctx->base.opad, ostate.state, ctx->state_sz)))
ctx->base.needs_inv = true;
if (safexcel_hmac_setkey(&ctx->base, keys.authkey, keys.authkeylen,
alg, ctx->state_sz))
goto badkey;
/* Now copy the keys into the context */
for (i = 0; i < keys.enckeylen / sizeof(u32); i++)
ctx->key[i] = cpu_to_le32(((u32 *)keys.enckey)[i]);
ctx->key_len = keys.enckeylen;
memcpy(&ctx->base.ipad, &istate.state, ctx->state_sz);
memcpy(&ctx->base.opad, &ostate.state, ctx->state_sz);
memzero_explicit(&keys, sizeof(keys));
return 0;