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From: "Stephan Müller" <smueller@chronox.de>
To: herbert@gondor.apana.org.au, ebiggers@kernel.org,
	mathew.j.martineau@linux.intel.com, dhowells@redhat.com
Cc: linux-crypto@vger.kernel.org, linux-fscrypt@vger.kernel.org,
	linux-kernel@vger.kernel.org, keyrings@vger.kernel.org
Subject: [PATCH 1/5] crypto: Add key derivation self-test support code
Date: Mon, 04 Jan 2021 22:47:06 +0100	[thread overview]
Message-ID: <2182726.ElGaqSPkdT@positron.chronox.de> (raw)
In-Reply-To: <4616980.31r3eYUQgx@positron.chronox.de>

As a preparation to add the key derivation implementations, the
self-test data structure definition and the common test code is made
available.

The test framework follows the testing applied by the NIST CAVP test
approach.

The structure of the test code follows the implementations found in
crypto/testmgr.c|h. In case the KDF implementations will be made
available via a kernel crypto API templates, the test code is intended
to be merged into testmgr.c|h.

Signed-off-by: Stephan Mueller <smueller@chronox.de>
---
 include/crypto/internal/kdf_selftest.h | 68 ++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 include/crypto/internal/kdf_selftest.h

diff --git a/include/crypto/internal/kdf_selftest.h b/include/crypto/internal/kdf_selftest.h
new file mode 100644
index 000000000000..c4f80d2cc61c
--- /dev/null
+++ b/include/crypto/internal/kdf_selftest.h
@@ -0,0 +1,68 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+/*
+ * Copyright (C) 2020, Stephan Mueller <smueller@chronox.de>
+ */
+
+#ifndef _CRYPTO_KDF_SELFTEST_H
+#define _CRYPTO_KDF_SELFTEST_H
+
+#include <crypto/hash.h>
+#include <linux/uio.h>
+
+struct kdf_testvec {
+	struct kvec seed[2];
+	unsigned int seed_nvec;
+	struct kvec info;
+	unsigned char *expected;
+	size_t expectedlen;
+};
+
+static inline int
+kdf_test(const struct kdf_testvec *test, const char *name,
+	 int (*crypto_kdf_setkey)(struct crypto_shash *kmd,
+				  const struct kvec *seed,
+				  unsigned int seed_nvec),
+	 int (*crypto_kdf_generate)(struct crypto_shash *kmd,
+				    const struct kvec *info,
+				    unsigned int info_nvec,
+				    u8 *dst, unsigned int dlen))
+{
+	struct crypto_shash *kmd;
+	int ret;
+	u8 *buf = kzalloc(test->expectedlen, GFP_KERNEL);
+
+	if (!buf)
+		return -ENOMEM;
+
+	kmd = crypto_alloc_shash(name, 0, 0);
+	if (IS_ERR(kmd)) {
+		pr_err("alg: kdf: could not allocate cipher handle for %s\n",
+		       name);
+		kfree(buf);
+		return -ENOMEM;
+	}
+
+	ret = crypto_kdf_setkey(kmd, test->seed, test->seed_nvec);
+	if (ret) {
+		pr_err("alg: kdf: could not set key derivation key\n");
+		goto err;
+	}
+
+	ret = crypto_kdf_generate(kmd, &test->info, 1, buf, test->expectedlen);
+	if (ret) {
+		pr_err("alg: kdf: could not obtain key data\n");
+		goto err;
+	}
+
+	ret = memcmp(test->expected, buf, test->expectedlen);
+	if (ret)
+		ret = -EINVAL;
+
+err:
+	crypto_free_shash(kmd);
+	kfree(buf);
+	return ret;
+}
+
+#endif /* _CRYPTO_KDF_SELFTEST_H */
-- 
2.26.2





  reply	other threads:[~2021-01-04 22:01 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-04 21:45 [PATCH 0/5] Add KDF implementations to crypto API Stephan Müller
2021-01-04 21:47 ` Stephan Müller [this message]
2021-01-04 21:47 ` [PATCH 2/5] crypto: add SP800-108 counter key derivation function Stephan Müller
2021-01-04 21:49 ` [PATCH 3/5] crypto: add RFC5869 HKDF Stephan Müller
2021-01-07  7:30   ` Eric Biggers
2021-01-07  7:53     ` Stephan Mueller
2021-01-07 18:53       ` Eric Biggers
2021-01-04 21:49 ` [PATCH 4/5] security: DH - use KDF implementation from crypto API Stephan Müller
2021-01-12  1:34   ` Jarkko Sakkinen
2021-01-04 21:50 ` [PATCH 5/5] fs: use HKDF implementation from kernel " Stephan Müller
2021-01-07  7:19   ` Eric Biggers
2021-01-07  7:49     ` Stephan Mueller
2021-01-07 18:47       ` Eric Biggers
2021-01-04 22:20 ` [PATCH 0/5] Add KDF implementations to " Eric Biggers
2021-01-07  6:37   ` Stephan Mueller
2021-01-07  6:59     ` Eric Biggers
2021-01-07  7:12       ` Eric Biggers

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