linux-kernel - [PATCH 4/7] crypto: testmgr - support test with different ciphertext per encryption

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Date:   Sun, 16 Feb 2020 16:59:25 +0800
From:   Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
To:     herbert@...dor.apana.org.au, davem@...emloft.net,
        ebiggers@...nel.org, pvanleeuwen@...bus.com, zohar@...ux.ibm.com
Cc:     linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 4/7] 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>
---
 crypto/testmgr.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/crypto/testmgr.c b/crypto/testmgr.c
index 82513b6b0abd..db9b5ac878e7 100644
--- a/crypto/testmgr.c
+++ b/crypto/testmgr.c
@@ -3741,7 +3741,7 @@ 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);
@@ -3772,6 +3772,11 @@ 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;
-- 
2.17.1