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Mon, 1 Feb 2021 15:19:16 GMT Received: from b03ledav001.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7DF7D6E04C; Mon, 1 Feb 2021 15:19:16 +0000 (GMT) Received: from b03ledav001.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A44AE6E050; Mon, 1 Feb 2021 15:19:15 +0000 (GMT) Received: from sbct-3.pok.ibm.com (unknown [9.47.158.153]) by b03ledav001.gho.boulder.ibm.com (Postfix) with ESMTP; Mon, 1 Feb 2021 15:19:15 +0000 (GMT) From: Stefan Berger To: keyrings@vger.kernel.org, linux-crypto@vger.kernel.org, davem@davemloft.net, herbert@gondor.apana.org.au, dhowells@redhat.com, zohar@linux.ibm.com Cc: linux-kernel@vger.kernel.org, patrick@puiterwijk.org, linux-integrity@vger.kernel.org, Stefan Berger Subject: [PATCH v7 0/4] Add support for x509 certs with NIST p256 and p192 keys Date: Mon, 1 Feb 2021 10:19:06 -0500 Message-Id: <20210201151910.1465705-1-stefanb@linux.ibm.com> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369, 18.0.737 definitions=2021-02-01_05:2021-01-29,2021-02-01 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 clxscore=1015 impostorscore=0 mlxscore=0 malwarescore=0 mlxlogscore=999 lowpriorityscore=0 bulkscore=0 priorityscore=1501 phishscore=0 spamscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2102010077 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org This series of patches adds support for x509 certificates signed by a CA that uses NIST p256 or p192 keys for signing. It also adds support for certificates where the public key is a NIST p256 or p192 key. The math for ECDSA signature verification is also added. Since self-signed certificates are verified upon loading, the following script can be used for testing: k=$(keyctl newring test @u) while :; do for hash in sha1 sha224 sha256 sha384 sha512; do openssl req \ -x509 \ -${hash} \ -newkey ec \ -pkeyopt ec_paramgen_curve:prime256v1 \ -keyout key.pem \ -days 365 \ -subj '/CN=test' \ -nodes \ -outform der \ -out cert.der keyctl padd asymmetric testkey $k < cert.der if [ $? -ne 0 ]; then echo "ERROR" exit 1 fi done done It also works with restricted keyrings where an RSA key is used to sign a NIST P256/P192 key. Scripts for testing are here: https://github.com/stefanberger/eckey-testing The ECDSA signature verification will be used by IMA Appraisal where ECDSA file signatures stored in RPM packages will use substantially less space than if RSA signatures were to be used. Stefan v6->v7: - Moved some OID defintions to patch 1 for bisectability - Applied R-b's v5->v6: - moved ecdsa code into its own module ecdsa_generic built from ecdsa.c - added script-generated test vectors for NIST P256 & P192 and all hashes - parsing of OID that contain header with new parse_oid() v4->v5: - registering crypto support under names ecdsa-nist-p256/p192 following Hubert Xu's suggestion in other thread - appended IMA ECDSA support patch v3->v4: - split off of ecdsa crypto part; registering akcipher as "ecdsa" and deriving used curve from digits in parsed key v2->v3: - patch 2 now includes linux/scatterlist.h v1->v2: - using faster vli_sub rather than newly added vli_mod_fast to 'reduce' result - rearranged switch statements to follow after RSA - 3rd patch from 1st posting is now 1st patch Stefan Berger (4): crypto: Add support for ECDSA signature verification x509: Detect sm2 keys by their parameters OID x509: Add support for parsing x509 certs with ECDSA keys ima: Support EC keys for signature verification crypto/Kconfig | 10 + crypto/Makefile | 6 + crypto/asymmetric_keys/public_key.c | 19 ++ crypto/asymmetric_keys/x509_cert_parser.c | 44 ++- crypto/ecc.c | 13 +- crypto/ecc.h | 28 ++ crypto/ecdsa.c | 361 ++++++++++++++++++++++ crypto/ecdsasignature.asn1 | 4 + crypto/testmgr.c | 12 + crypto/testmgr.h | 267 ++++++++++++++++ include/keys/asymmetric-type.h | 6 + include/linux/oid_registry.h | 7 + lib/oid_registry.c | 13 + security/integrity/digsig_asymmetric.c | 29 +- 14 files changed, 790 insertions(+), 29 deletions(-) create mode 100644 crypto/ecdsa.c create mode 100644 crypto/ecdsasignature.asn1