From: Gadre Nayan <gadrenayan@gmail.com>
Subject: skcipher
Date: Mon, 2 May 2016 11:14:01 +0530
Message-ID: <CAKJ7aR5-GbkuFPQkw7DdKJLCKV48LzRY-WUeTeayZkK_h7cTUQ@mail.gmail.com>
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To: linux-crypto@vger.kernel.org
Sender: linux-crypto-owner@vger.kernel.org

Hello,

I have read the crypto library documentation on chronox.de.

I used there sample code for symmetric key cipher operation.
However in the check:

skcipher = crypto_alloc_skcipher("cbc-aes-aesni", 0, 0);
if (IS_ERR(skcipher)) {
pr_info("could not allocate skcipher handle\n");
return PTR_ERR(skcipher);
}

I get could not allocate skcipher handle.

I have loaded all possible related modules for crypto:
lsmod (relevant):
algif_skcipher         32768  0
algif_hash             20480  0
algif_aead             20480  0
af_alg                 24576  3 algif_aead,algif_hash,algif_skcipher
cryptd
ablk_helper.

What am I missing here?

Also IS_ERR checks if the skcipher value may be <1000, it may include
the NULL check right?.

Thanks.