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| author | Vitaly Chikunov <vt@altlinux.org> | 2019-04-11 18:51:22 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-04-18 22:15:03 +0800 |
| commit | be08f0c681a8469f2537f04de76e73a68c9c96e1 (patch) | |
| tree | 9a1cac9d0b07ba10ec434fc0cfbe43a2a807f289 | |
| parent | 32fbdbd32e1caafd7ae9b750e12fe8f2ea038add (diff) | |
| download | lwn-be08f0c681a8469f2537f04de76e73a68c9c96e1.tar.gz lwn-be08f0c681a8469f2537f04de76e73a68c9c96e1.zip | |
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@linux.ibm.com>
Cc: Dmitry Kasatkin <dmitry.kasatkin@gmail.com>
Cc: linux-integrity@vger.kernel.org
Signed-off-by: Vitaly Chikunov <vt@altlinux.org>
Reviewed-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | security/integrity/digsig_asymmetric.c | 11 |
1 files 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; |