diff options
| author |  Pascal van Leeuwen <pascalvanl@gmail.com>
| 2019-08-30 09:42:29 +0200 |
|---|---|---|
| committer |  Herbert Xu <herbert@gondor.apana.org.au>
| 2019-09-05 14:37:01 +1000 |
| commit | 493e289ca8aab8f9408376d6388ac8f819de6b73 (patch) | |
| tree | 6da8aa158d36f738227cecf6f22460fa6bdc3581 /drivers/crypto | |
| parent | crypto: inside-secure - Made .cra_priority value a define (diff) | |
| download | linux-493e289ca8aab8f9408376d6388ac8f819de6b73.tar.gz linux-493e289ca8aab8f9408376d6388ac8f819de6b73.tar.bz2 linux-493e289ca8aab8f9408376d6388ac8f819de6b73.zip | |
crypto: inside-secure - Minor optimization recognizing CTR is always AES
Moved counter mode handling code in front as it doesn't depend on the
rest of the code to be executed, it can just do its thing and exit.
Signed-off-by: Pascal van Leeuwen <pvanleeuwen@verimatrix.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/inside-secure/safexcel_cipher.c | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/drivers/crypto/inside-secure/safexcel_cipher.c b/drivers/crypto/inside-secure/safexcel_cipher.c index 6e2027ec167f..18115dac9d01 100644 --- a/drivers/crypto/inside-secure/safexcel_cipher.c +++ b/drivers/crypto/inside-secure/safexcel_cipher.c @@ -65,6 +65,19 @@ static void safexcel_cipher_token(struct safexcel_cipher_ctx *ctx, u8 *iv, { u32 block_sz = 0; + if (ctx->mode == CONTEXT_CONTROL_CRYPTO_MODE_CTR_LOAD) { + cdesc->control_data.options |= EIP197_OPTION_4_TOKEN_IV_CMD; + + /* 32 bit nonce */ + cdesc->control_data.token[0] = ctx->nonce; + /* 64 bit IV part */ + memcpy(&cdesc->control_data.token[1], iv, 8); + /* 32 bit counter, start at 1 (big endian!) */ + cdesc->control_data.token[3] = cpu_to_be32(1); + + return; + } + if (ctx->mode != CONTEXT_CONTROL_CRYPTO_MODE_ECB) { switch (ctx->alg) { case SAFEXCEL_DES: @@ -80,17 +93,7 @@ static void safexcel_cipher_token(struct safexcel_cipher_ctx *ctx, u8 *iv, cdesc->control_data.options |= EIP197_OPTION_4_TOKEN_IV_CMD; break; } - - if (ctx->mode == CONTEXT_CONTROL_CRYPTO_MODE_CTR_LOAD) { - /* 32 bit nonce */ - cdesc->control_data.token[0] = ctx->nonce; - /* 64 bit IV part */ - memcpy(&cdesc->control_data.token[1], iv, 8); - /* 32 bit counter, start at 1 (big endian!) */ - cdesc->control_data.token[3] = cpu_to_be32(1); - } else { - memcpy(cdesc->control_data.token, iv, block_sz); - } + memcpy(cdesc->control_data.token, iv, block_sz); } } |