From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tianjia Zhang Date: Wed, 08 Jul 2020 08:28:18 +0000 Subject: [PATCH v4 8/8] integrity: Asymmetric digsig supports SM2-with-SM3 algorithm Message-Id: <20200708082818.5511-9-tianjia.zhang@linux.alibaba.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit List-Id: References: <20200708082818.5511-1-tianjia.zhang@linux.alibaba.com> In-Reply-To: <20200708082818.5511-1-tianjia.zhang@linux.alibaba.com> To: herbert@gondor.apana.org.au, davem@davemloft.net, dhowells@redhat.com, mcoquelin.stm32@gmail.com, alexandre.torgue@st.com, jmorris@namei.org, serge@hallyn.com, nramas@linux.microsoft.com, tusharsu@linux.microsoft.com, zohar@linux.ibm.com, gilad@benyossef.com, pvanleeuwen@rambus.com Cc: tianjia.zhang@linux.alibaba.com, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, keyrings@vger.kernel.org, linux-crypto@vger.kernel.org, zhang.jia@linux.alibaba.com, linux-integrity@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Asymmetric digsig supports SM2-with-SM3 algorithm combination, so that IMA can also verify SM2's signature data. Signed-off-by: Tianjia Zhang --- security/integrity/digsig_asymmetric.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/security/integrity/digsig_asymmetric.c b/security/integrity/digsig_asymmetric.c index 4e0d6778277e..9350fcfb9bf2 100644 --- a/security/integrity/digsig_asymmetric.c +++ b/security/integrity/digsig_asymmetric.c @@ -99,14 +99,22 @@ int asymmetric_verify(struct key *keyring, const char *sig, memset(&pks, 0, sizeof(pks)); pks.hash_algo = hash_algo_name[hdr->hash_algo]; - if (hdr->hash_algo = HASH_ALGO_STREEBOG_256 || - hdr->hash_algo = HASH_ALGO_STREEBOG_512) { + switch (hdr->hash_algo) { + case HASH_ALGO_STREEBOG_256: + case HASH_ALGO_STREEBOG_512: /* EC-RDSA and Streebog should go together. */ pks.pkey_algo = "ecrdsa"; pks.encoding = "raw"; - } else { + break; + case HASH_ALGO_SM3_256: + /* SM2 and SM3 should go together. */ + pks.pkey_algo = "sm2"; + pks.encoding = "raw"; + break; + default: pks.pkey_algo = "rsa"; pks.encoding = "pkcs1"; + break; } pks.digest = (u8 *)data; pks.digest_size = datalen; -- 2.17.1