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authorVitaly Chikunov <vt@altlinux.org>2019-04-11 18:51:22 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2019-04-18 22:15:03 +0800
commitbe08f0c681a8469f2537f04de76e73a68c9c96e1 (patch)
tree9a1cac9d0b07ba10ec434fc0cfbe43a2a807f289
parent32fbdbd32e1caafd7ae9b750e12fe8f2ea038add (diff)
downloadlinux-be08f0c681a8469f2537f04de76e73a68c9c96e1.tar.bz2
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.c11
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;