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Message-ID: <6c4fbd8240af542f2c5e26e990825f1232009aaf.camel@cs.com>
Subject: Internal crypto test fail: changed 'req->iv'
From:   Richard van Schagen <vschagen@cs.com>
To:     linux-crypto@vger.kernel.org
Date:   Mon, 30 Dec 2019 18:09:50 +0800
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I am writing a module for the EIP93 crypto engine. From what I have
been reading on this mailing list, the driver should return the updated
IV in order for the caller to “resume” or “continue” with this IV in
another call.

A code-snippet:

int ivsize = crypto_skcipher_ivsize(skcipher);

If (ivsize)
	memcpy(req->iv, rctx->lastiv, ivsize);

Where rctx->lastiv was read from the hardware itself.

The fail message I am getting is:
[   57.290000] alg: skcipher: changed 'req->iv'
[   57.370000] alg: skcipher: eip93-cbc-aes encryption co
rrupted request struct on test vector 0, cfg="in-place"
[   57.380000] alg: skcipher: changed 'req->iv'
[   57.460000] alg: skcipher: eip93-ctr-aes encryption corrupted
request struct on test vector 0, cfg="in-place"
[   57.470000] alg: skcipher: changed 'req->iv'
[   57.560000] alg: skcipher: eip93-rfc3686(ctr)-aes encryption
corrupted request struct on test vector 0, cfg="in-place"
[   57.570000] alg: skcipher: changed 'req->iv’

Where/How should I return the new/updated IV ?

Thanks,

Richard van Schagen