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integrity: Asymmetric digsig supports SM2-with-SM3 algorithm

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Asymmetric digsig supports SM2-with-SM3 algorithm combination,
so that IMA can also verify SM2's signature data.

Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Tested-by: Xufeng Zhang <yunbo.xufeng@linux.alibaba.com>
Reviewed-by: Mimi Zohar <zohar@linux.ibm.com>
Reviewed-by: Vitaly Chikunov <vt@altlinux.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Tianjia Zhang 2020-09-21 00:21:03 +08:00 committed by Herbert Xu
parent 2155256396
commit 0b7e44d39c
1 changed files with 11 additions and 3 deletions
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14
security/integrity/digsig_asymmetric.c
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@ -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;