linux-kernel - [PATCH v6 5/8] crypto: testmgr - support test with different ciphertext per encryption

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Date:   Thu,  3 Sep 2020 21:12:39 +0800
From:   Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
To:     Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        David Howells <dhowells@...hat.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        James Morris <jmorris@...ei.org>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        Stephan Mueller <smueller@...onox.de>,
        Marcelo Henrique Cerri <marcelo.cerri@...onical.com>,
        "Steven Rostedt (VMware)" <rostedt@...dmis.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Brendan Higgins <brendanhiggins@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Johannes Weiner <hannes@...xchg.org>,
        Waiman Long <longman@...hat.com>,
        Mimi Zohar <zohar@...ux.ibm.com>,
        Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>,
        Colin Ian King <colin.king@...onical.com>,
        Tushar Sugandhi <tusharsu@...ux.microsoft.com>,
        Vitaly Chikunov <vt@...linux.org>,
        "Gilad Ben-Yossef" <gilad@...yossef.com>,
        Pascal van Leeuwen <pvanleeuwen@...bus.com>,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
        keyrings@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org,
        linux-security-module@...r.kernel.org
Cc:     Xufeng Zhang <yunbo.xufeng@...ux.alibaba.com>,
        Jia Zhang <zhang.jia@...ux.alibaba.com>,
        Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
Subject: [PATCH v6 5/8] crypto: testmgr - support test with different ciphertext per encryption

Some asymmetric algorithms will get different ciphertext after
each encryption, such as SM2, and let testmgr support the testing
of such algorithms.

In struct akcipher_testvec, set c and c_size to be empty, skip
the comparison of the ciphertext, and compare the decrypted
plaintext with m to achieve the test purpose.

Signed-off-by: Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
Tested-by: Xufeng Zhang <yunbo.xufeng@...ux.alibaba.com>
---
 crypto/testmgr.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/crypto/testmgr.c b/crypto/testmgr.c
index 23c27fc96394..cd002a030af5 100644
--- a/crypto/testmgr.c
+++ b/crypto/testmgr.c
@@ -4025,7 +4025,7 @@ static int test_akcipher_one(struct crypto_akcipher *tfm,
 		pr_err("alg: akcipher: %s test failed. err %d\n", op, err);
 		goto free_all;
 	}
-	if (!vecs->siggen_sigver_test) {
+	if (!vecs->siggen_sigver_test && c) {
 		if (req->dst_len != c_size) {
 			pr_err("alg: akcipher: %s test failed. Invalid output len\n",
 			       op);
@@ -4056,6 +4056,11 @@ static int test_akcipher_one(struct crypto_akcipher *tfm,
 		goto free_all;
 	}
 
+	if (!vecs->siggen_sigver_test && !c) {
+		c = outbuf_enc;
+		c_size = req->dst_len;
+	}
+
 	op = vecs->siggen_sigver_test ? "sign" : "decrypt";
 	if (WARN_ON(c_size > PAGE_SIZE))
 		goto free_all;
-- 
2.19.1.3.ge56e4f7