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Message-Id: <20190326125842.24110-11-vt@altlinux.org>
Date: Tue, 26 Mar 2019 15:58:42 +0300
From: Vitaly Chikunov <vt@...linux.org>
To: Herbert Xu <herbert@...dor.apana.org.au>,
David Howells <dhowells@...hat.com>,
Mimi Zohar <zohar@...ux.ibm.com>,
Dmitry Kasatkin <dmitry.kasatkin@...il.com>,
linux-integrity@...r.kernel.org, keyrings@...r.kernel.org,
linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v8 10/10] integrity: support EC-RDSA signatures for asymmetric_verify
Allow to use EC-RDSA signatures for IMA by determining signature type by
the hash algorithm name. This works good for EC-RDSA since Streebog and
EC-RDSA should always be used together.
Cc: Mimi Zohar <zohar@...ux.ibm.com>
Cc: Dmitry Kasatkin <dmitry.kasatkin@...il.com>
Cc: linux-integrity@...r.kernel.org
Signed-off-by: Vitaly Chikunov <vt@...linux.org>
---
security/integrity/digsig_asymmetric.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/security/integrity/digsig_asymmetric.c b/security/integrity/digsig_asymmetric.c
index d775e03fbbcc..99080871eb9f 100644
--- a/security/integrity/digsig_asymmetric.c
+++ b/security/integrity/digsig_asymmetric.c
@@ -104,9 +104,16 @@ int asymmetric_verify(struct key *keyring, const char *sig,
memset(&pks, 0, sizeof(pks));
- pks.pkey_algo = "rsa";
pks.hash_algo = hash_algo_name[hdr->hash_algo];
- pks.encoding = "pkcs1";
+ if (hdr->hash_algo == HASH_ALGO_STREEBOG_256 ||
+ hdr->hash_algo == HASH_ALGO_STREEBOG_512) {
+ /* EC-RDSA and Streebog should go together. */
+ pks.pkey_algo = "ecrdsa";
+ pks.encoding = "raw";
+ } else {
+ pks.pkey_algo = "rsa";
+ pks.encoding = "pkcs1";
+ }
pks.digest = (u8 *)data;
pks.digest_size = datalen;
pks.s = hdr->sig;
--
2.11.0
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