From patchwork Fri May 3 04:38:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joachim Vandersmissen X-Patchwork-Id: 794660 Received: from smtp.jvdsn.com (smtp.jvdsn.com [129.153.194.31]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A3DBE139563 for ; Fri, 3 May 2024 04:39:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=129.153.194.31 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714711173; cv=none; b=BXO+vj3FRft0QM5I1odtWoKg/imlNRA9a7fgCCroySc0RM1vwmx0uq61+I1DOtO82YeqGdE8BgX+zQMBdizC0OYGdswPsCaYcTPBA4v6XcA4fjAHMBFwDaTAeKYEZXC9ZqHU9DsRkP9AuCtOUuDgzoQw7OdBFYuCrRtzjjs0Q60= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714711173; c=relaxed/simple; bh=jksnkYTqoJ7V40I1JnjByP4SbO+xtoVW1235TqH2HkA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=a4XoKyvRG9NbpjVgHX2R3ZIZZSgWV7IAwXEYrWZw+j9J8am2st9wRVxvEoUejS8nZeYp733IQrzUlBpDFuqU0kFq2rzcr65actD3MO/7zJGpoguS/rwLsQzamkhyGVlqs/t6Yw0LfIuIDvUixkCHFAIZ3ruuDtjG8sQrB5xCZis= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=jvdsn.com; spf=pass smtp.mailfrom=jvdsn.com; dkim=pass (2048-bit key) header.d=jvdsn.com header.i=@jvdsn.com header.b=FMdEdLAF; arc=none smtp.client-ip=129.153.194.31 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=jvdsn.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=jvdsn.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=jvdsn.com header.i=@jvdsn.com header.b="FMdEdLAF" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=jvdsn.com; s=mail; t=1714711163; bh=jksnkYTqoJ7V40I1JnjByP4SbO+xtoVW1235TqH2HkA=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=FMdEdLAFbNMZBVajsipsYW2xm9GQJaHChh0U0c/tX9Frh1BHt6wrRzJTHuNzRVxf4 BcKWQ29rrjmzpliwv7ckqIr/ozO5tnsUO/IWnxNqxMVqXPGj0V+wTU2fS/5JLk1G97 DMDA1/HR4yRIZd1ioeGMMh7ck5Mwpdxn3+yJ8UYmjZLYgDKv1HkzxcIBmUCcxc0dyg HQWPv0PNm/FM986kI9cBToWRPfTHnouiTEyLt+cHkca7qMoPENSMwIK+ccvS+BRYka eTEpZYSGpH6yoTMolUN1AhgeIKS9+b0ylUWvblTvaMPHsxMtqS0uQvrplnQiKfsBAu JA6aXkaT4k31A== From: Joachim Vandersmissen To: linux-crypto@vger.kernel.org, Herbert Xu Cc: David Howells , Simo Sorce , Stephan Mueller , Joachim Vandersmissen Subject: [PATCH v3 2/2] certs: Add ECDSA signature verification self-test Date: Thu, 2 May 2024 23:38:57 -0500 Message-ID: <20240503043857.45515-2-git@jvdsn.com> X-Mailer: git-send-email 2.45.0 In-Reply-To: <20240503043857.45515-1-git@jvdsn.com> References: <20240503043857.45515-1-git@jvdsn.com> Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 v3: adding the FIPS_SIGNATURE_SELFTEST_RSA configuration option to enforce that ECDSA (and SHA-256) are either built-in; or ECDSA (and SHA-256) and x509_selftest are modules. ---8<--- Commit c27b2d2012e1 ("crypto: testmgr - allow ecdsa-nist-p256 and -p384 in FIPS mode") enabled support for ECDSA in crypto/testmgr.c. The PKCS#7 signature verification API builds upon the KCAPI primitives to perform its high-level operations. Therefore, this change in testmgr.c also allows ECDSA to be used by the PKCS#7 signature verification API (in FIPS mode). However, from a FIPS perspective, the PKCS#7 signature verification API is a distinct "service" from the KCAPI primitives. This is because the PKCS#7 API performs a "full" signature verification, which consists of both hashing the data to be verified, and the public key operation. On the other hand, the KCAPI primitive does not perform this hashing step - it accepts pre-hashed data from the caller and only performs the public key operation. For this reason, the ECDSA self-tests in crypto/testmgr.c are not sufficient to cover ECDSA signature verification offered by the PKCS#7 API. This is reflected by the self-test already present in this file for RSA PKCS#1 v1.5 signature verification. The solution is simply to add a second self-test here for ECDSA. P-256 with SHA-256 hashing was chosen as those parameters should remain FIPS-approved for the foreseeable future, while keeping the performance impact to a minimum. The ECDSA certificate and PKCS#7 signed data was generated using OpenSSL. The input data is identical to the input data for the existing RSA self-test. Signed-off-by: Joachim Vandersmissen --- crypto/asymmetric_keys/Kconfig | 10 +++ crypto/asymmetric_keys/Makefile | 1 + crypto/asymmetric_keys/selftest.c | 1 + crypto/asymmetric_keys/selftest.h | 6 ++ crypto/asymmetric_keys/selftest_ecdsa.c | 89 +++++++++++++++++++++++++ 5 files changed, 107 insertions(+) create mode 100644 crypto/asymmetric_keys/selftest_ecdsa.c diff --git a/crypto/asymmetric_keys/Kconfig b/crypto/asymmetric_keys/Kconfig index 68434c745b3c..f01ae999a0d6 100644 --- a/crypto/asymmetric_keys/Kconfig +++ b/crypto/asymmetric_keys/Kconfig @@ -96,4 +96,14 @@ config FIPS_SIGNATURE_SELFTEST_RSA depends on CRYPTO_SHA256=y || CRYPTO_SHA256=FIPS_SIGNATURE_SELFTEST depends on CRYPTO_RSA=y || CRYPTO_RSA=FIPS_SIGNATURE_SELFTEST +config FIPS_SIGNATURE_SELFTEST_ECDSA + bool "Include ECDSA selftests" + help + This option includes the ECDSA selftests in the X.509+PKCS7 selftest + code. ECDSA and SHA-256 must be available when the selftests are + executed; this is enforced by the dependencies. + depends on FIPS_SIGNATURE_SELFTEST + depends on CRYPTO_SHA256=y || CRYPTO_SHA256=FIPS_SIGNATURE_SELFTEST + depends on CRYPTO_ECDSA=y || CRYPTO_ECDSA=FIPS_SIGNATURE_SELFTEST + endif # ASYMMETRIC_KEY_TYPE diff --git a/crypto/asymmetric_keys/Makefile b/crypto/asymmetric_keys/Makefile index ac1402e27324..bc65d3b98dcb 100644 --- a/crypto/asymmetric_keys/Makefile +++ b/crypto/asymmetric_keys/Makefile @@ -25,6 +25,7 @@ x509_key_parser-y := \ obj-$(CONFIG_FIPS_SIGNATURE_SELFTEST) += x509_selftest.o x509_selftest-y += selftest.o x509_selftest-$(CONFIG_FIPS_SIGNATURE_SELFTEST_RSA) += selftest_rsa.o +x509_selftest-$(CONFIG_FIPS_SIGNATURE_SELFTEST_ECDSA) += selftest_ecdsa.o $(obj)/x509_cert_parser.o: \ $(obj)/x509.asn1.h \ diff --git a/crypto/asymmetric_keys/selftest.c b/crypto/asymmetric_keys/selftest.c index ec289d2d065c..98dc5cdfdebe 100644 --- a/crypto/asymmetric_keys/selftest.c +++ b/crypto/asymmetric_keys/selftest.c @@ -61,6 +61,7 @@ void fips_signature_selftest(const char *name, static int __init fips_signature_selftest_init(void) { fips_signature_selftest_rsa(); + fips_signature_selftest_ecdsa(); return 0; } diff --git a/crypto/asymmetric_keys/selftest.h b/crypto/asymmetric_keys/selftest.h index 842ac3cf86b4..4139f05906cb 100644 --- a/crypto/asymmetric_keys/selftest.h +++ b/crypto/asymmetric_keys/selftest.h @@ -14,3 +14,9 @@ void __init fips_signature_selftest_rsa(void); #else static inline void __init fips_signature_selftest_rsa(void) { } #endif + +#ifdef CONFIG_FIPS_SIGNATURE_SELFTEST_ECDSA +void __init fips_signature_selftest_ecdsa(void); +#else +static inline void __init fips_signature_selftest_ecdsa(void) { } +#endif diff --git a/crypto/asymmetric_keys/selftest_ecdsa.c b/crypto/asymmetric_keys/selftest_ecdsa.c new file mode 100644 index 000000000000..3ee2e4ea9e3f --- /dev/null +++ b/crypto/asymmetric_keys/selftest_ecdsa.c @@ -0,0 +1,89 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* Self-tests for PKCS#7 ECDSA signature verification. + * + * Copyright (C) 2024 Joachim Vandersmissen + */ + +#include +#include "selftest.h" + +/* + * Set of X.509 certificates to provide public keys for the tests. These will + * be loaded into a temporary keyring for the duration of the testing. + */ +static const u8 certs_selftest_ecdsa_keys[] __initconst = { + /* P-256 ECDSA certificate */ + "\x30\x82\x01\xd4\x30\x82\x01\x7b\xa0\x03\x02\x01\x02\x02\x14\x2e" + "\xea\x64\x8d\x7f\x17\xe6\x2e\x9e\x58\x69\xc8\x87\xc6\x8e\x1b\xd0" + "\xf8\x6f\xde\x30\x0a\x06\x08\x2a\x86\x48\xce\x3d\x04\x03\x02\x30" + "\x3a\x31\x38\x30\x36\x06\x03\x55\x04\x03\x0c\x2f\x43\x65\x72\x74" + "\x69\x66\x69\x63\x61\x74\x65\x20\x76\x65\x72\x69\x66\x69\x63\x61" + "\x74\x69\x6f\x6e\x20\x45\x43\x44\x53\x41\x20\x73\x65\x6c\x66\x2d" + "\x74\x65\x73\x74\x69\x6e\x67\x20\x6b\x65\x79\x30\x20\x17\x0d\x32" + "\x34\x30\x34\x31\x33\x32\x32\x31\x36\x32\x36\x5a\x18\x0f\x32\x31" + "\x32\x34\x30\x33\x32\x30\x32\x32\x31\x36\x32\x36\x5a\x30\x3a\x31" + "\x38\x30\x36\x06\x03\x55\x04\x03\x0c\x2f\x43\x65\x72\x74\x69\x66" + "\x69\x63\x61\x74\x65\x20\x76\x65\x72\x69\x66\x69\x63\x61\x74\x69" + "\x6f\x6e\x20\x45\x43\x44\x53\x41\x20\x73\x65\x6c\x66\x2d\x74\x65" + "\x73\x74\x69\x6e\x67\x20\x6b\x65\x79\x30\x59\x30\x13\x06\x07\x2a" + "\x86\x48\xce\x3d\x02\x01\x06\x08\x2a\x86\x48\xce\x3d\x03\x01\x07" + "\x03\x42\x00\x04\x07\xe5\x6b\x51\xaf\xfc\x19\x41\x2c\x88\x92\x6b" + "\x77\x57\x71\x03\x9e\xe2\xfe\x6e\x6a\x71\x4e\xc7\x29\x9f\x90\xe1" + "\x77\x18\x9f\xc2\xe7\x0a\x82\xd0\x8a\xe1\x81\xa9\x71\x7c\x5a\x73" + "\xfb\x25\xb9\x5b\x1e\x24\x8c\x73\x9f\xf8\x38\xf8\x48\xb4\xad\x16" + "\x19\xc0\x22\xc6\xa3\x5d\x30\x5b\x30\x1d\x06\x03\x55\x1d\x0e\x04" + "\x16\x04\x14\x29\x00\xbc\xea\x1d\xeb\x7b\xc8\x47\x9a\x84\xa2\x3d" + "\x75\x8e\xfd\xfd\xd2\xb2\xd3\x30\x1f\x06\x03\x55\x1d\x23\x04\x18" + "\x30\x16\x80\x14\x29\x00\xbc\xea\x1d\xeb\x7b\xc8\x47\x9a\x84\xa2" + "\x3d\x75\x8e\xfd\xfd\xd2\xb2\xd3\x30\x0c\x06\x03\x55\x1d\x13\x01" + "\x01\xff\x04\x02\x30\x00\x30\x0b\x06\x03\x55\x1d\x0f\x04\x04\x03" + "\x02\x07\x80\x30\x0a\x06\x08\x2a\x86\x48\xce\x3d\x04\x03\x02\x03" + "\x47\x00\x30\x44\x02\x20\x1a\xd7\xac\x07\xc8\x97\x38\xf4\x89\x43" + "\x7e\xc7\x66\x6e\xa5\x00\x7c\x12\x1d\xb4\x09\x76\x0c\x99\x6b\x8c" + "\x26\x5d\xe9\x70\x5c\xb4\x02\x20\x73\xb7\xc7\x7a\x5a\xdb\x67\x0a" + "\x96\x42\x19\xcf\x4f\x67\x4f\x35\x6a\xee\x29\x25\xf2\x4f\xc8\x10" + "\x14\x9d\x79\x69\x1c\x7a\xd7\x5d" +}; + + +/* + * Signed data and detached signature blobs that form the verification tests. + */ +static const u8 certs_selftest_ecdsa_data[] __initconst = { + "\x54\x68\x69\x73\x20\x69\x73\x20\x73\x6f\x6d\x65\x20\x74\x65\x73" + "\x74\x20\x64\x61\x74\x61\x20\x75\x73\x65\x64\x20\x66\x6f\x72\x20" + "\x73\x65\x6c\x66\x2d\x74\x65\x73\x74\x69\x6e\x67\x20\x63\x65\x72" + "\x74\x69\x66\x69\x63\x61\x74\x65\x20\x76\x65\x72\x69\x66\x69\x63" + "\x61\x74\x69\x6f\x6e\x2e\x0a" +}; + +static const u8 certs_selftest_ecdsa_sig[] __initconst = { + /* ECDSA signature using SHA-256 */ + "\x30\x81\xf4\x06\x09\x2a\x86\x48\x86\xf7\x0d\x01\x07\x02\xa0\x81" + "\xe6\x30\x81\xe3\x02\x01\x01\x31\x0f\x30\x0d\x06\x09\x60\x86\x48" + "\x01\x65\x03\x04\x02\x01\x05\x00\x30\x0b\x06\x09\x2a\x86\x48\x86" + "\xf7\x0d\x01\x07\x01\x31\x81\xbf\x30\x81\xbc\x02\x01\x01\x30\x52" + "\x30\x3a\x31\x38\x30\x36\x06\x03\x55\x04\x03\x0c\x2f\x43\x65\x72" + "\x74\x69\x66\x69\x63\x61\x74\x65\x20\x76\x65\x72\x69\x66\x69\x63" + "\x61\x74\x69\x6f\x6e\x20\x45\x43\x44\x53\x41\x20\x73\x65\x6c\x66" + "\x2d\x74\x65\x73\x74\x69\x6e\x67\x20\x6b\x65\x79\x02\x14\x2e\xea" + "\x64\x8d\x7f\x17\xe6\x2e\x9e\x58\x69\xc8\x87\xc6\x8e\x1b\xd0\xf8" + "\x6f\xde\x30\x0d\x06\x09\x60\x86\x48\x01\x65\x03\x04\x02\x01\x05" + "\x00\x30\x0a\x06\x08\x2a\x86\x48\xce\x3d\x04\x03\x02\x04\x48\x30" + "\x46\x02\x21\x00\x86\xd1\xf4\x06\xb6\x49\x79\xf9\x09\x5f\x35\x1a" + "\x94\x7e\x0e\x1a\x12\x4d\xd9\xe6\x2a\x2d\xcf\x2d\x0a\xee\x88\x76" + "\xe0\x35\xf3\xeb\x02\x21\x00\xdf\x11\x8a\xab\x31\xf6\x3c\x1f\x32" + "\x43\x94\xe2\xb8\x35\xc9\xf3\x12\x4e\x9b\x31\x08\x10\x5d\x8d\xe2" + "\x43\x0a\x5f\xf5\xfd\xa2\xf1" +}; + +void __init fips_signature_selftest_ecdsa(void) +{ + fips_signature_selftest("ECDSA", + certs_selftest_ecdsa_keys, + sizeof(certs_selftest_ecdsa_keys) - 1, + certs_selftest_ecdsa_data, + sizeof(certs_selftest_ecdsa_data) - 1, + certs_selftest_ecdsa_sig, + sizeof(certs_selftest_ecdsa_sig) - 1); +}