| Message ID | 20210131233301.1301787-5-stefanb@linux.ibm.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | Add support for x509 certs with NIST p256 and p192 keys | expand |
On 2/1/21 7:33 AM, Stefan Berger wrote: > Add support for IMA signature verification for EC keys. Since SHA type > of hashes can be used by RSA and ECDSA signature schemes we need to > look at the key and derive from the key which signature scheme to use. > Since this can be applied to all types of keys, we change the selection > of the encoding type to be driven by the key's signature scheme rather > than by the hash type. > > Signed-off-by: Stefan Berger <stefanb@linux.ibm.com> > Reviewed-by: Vitaly Chikunov <vt@altlinux.org> > Cc: Mimi Zohar <zohar@linux.ibm.com> > Cc: Dmitry Kasatkin <dmitry.kasatkin@gmail.com> > Cc: linux-integrity@vger.kernel.org > Cc: Vitaly Chikunov <vt@altlinux.org> > Cc: Tianjia Zhang <tianjia.zhang@linux.alibaba.com> > Cc: David Howells <dhowells@redhat.com> > Cc: keyrings@vger.kernel.org > --- > include/keys/asymmetric-type.h | 6 ++++++ > security/integrity/digsig_asymmetric.c | 29 ++++++++++++-------------- > 2 files changed, 19 insertions(+), 16 deletions(-) > > diff --git a/include/keys/asymmetric-type.h b/include/keys/asymmetric-type.h > index a29d3ff2e7e8..c432fdb8547f 100644 > --- a/include/keys/asymmetric-type.h > +++ b/include/keys/asymmetric-type.h > @@ -72,6 +72,12 @@ const struct asymmetric_key_ids *asymmetric_key_ids(const struct key *key) > return key->payload.data[asym_key_ids]; > } > > +static inline > +const struct public_key *asymmetric_key_public_key(const struct key *key) > +{ > + return key->payload.data[asym_crypto]; > +} > + > extern struct key *find_asymmetric_key(struct key *keyring, > const struct asymmetric_key_id *id_0, > const struct asymmetric_key_id *id_1, > diff --git a/security/integrity/digsig_asymmetric.c b/security/integrity/digsig_asymmetric.c > index a662024b4c70..29002d016607 100644 > --- a/security/integrity/digsig_asymmetric.c > +++ b/security/integrity/digsig_asymmetric.c > @@ -84,6 +84,7 @@ int asymmetric_verify(struct key *keyring, const char *sig, > { > struct public_key_signature pks; > struct signature_v2_hdr *hdr = (struct signature_v2_hdr *)sig; > + const struct public_key *pk; > struct key *key; > int ret; > > @@ -105,23 +106,19 @@ int asymmetric_verify(struct key *keyring, const char *sig, > memset(&pks, 0, sizeof(pks)); > > pks.hash_algo = hash_algo_name[hdr->hash_algo]; > - 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"; > - 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"; > + > + pk = asymmetric_key_public_key(key); > + pks.pkey_algo = pk->pkey_algo; > + if (!strcmp(pk->pkey_algo, "rsa")) > pks.encoding = "pkcs1"; > - break; > - } > + else if (!strcmp(pk->pkey_algo, "ecdsa")) > + pks.encoding = "x962"; > + else if (!strcmp(pk->pkey_algo, "ecrdsa") || > + !strcmp(pk->pkey_algo, "sm2")) > + pks.encoding = "raw"; > + else > + return -ENOPKG; > + > pks.digest = (u8 *)data; > pks.digest_size = datalen; > pks.s = hdr->sig; > Looks good to me, so Reviewed-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com> Thanks, Tianjia
diff --git a/include/keys/asymmetric-type.h b/include/keys/asymmetric-type.h index a29d3ff2e7e8..c432fdb8547f 100644 --- a/include/keys/asymmetric-type.h +++ b/include/keys/asymmetric-type.h @@ -72,6 +72,12 @@ const struct asymmetric_key_ids *asymmetric_key_ids(const struct key *key) return key->payload.data[asym_key_ids]; } +static inline +const struct public_key *asymmetric_key_public_key(const struct key *key) +{ + return key->payload.data[asym_crypto]; +} + extern struct key *find_asymmetric_key(struct key *keyring, const struct asymmetric_key_id *id_0, const struct asymmetric_key_id *id_1, diff --git a/security/integrity/digsig_asymmetric.c b/security/integrity/digsig_asymmetric.c index a662024b4c70..29002d016607 100644 --- a/security/integrity/digsig_asymmetric.c +++ b/security/integrity/digsig_asymmetric.c @@ -84,6 +84,7 @@ int asymmetric_verify(struct key *keyring, const char *sig, { struct public_key_signature pks; struct signature_v2_hdr *hdr = (struct signature_v2_hdr *)sig; + const struct public_key *pk; struct key *key; int ret; @@ -105,23 +106,19 @@ int asymmetric_verify(struct key *keyring, const char *sig, memset(&pks, 0, sizeof(pks)); pks.hash_algo = hash_algo_name[hdr->hash_algo]; - 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"; - 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"; + + pk = asymmetric_key_public_key(key); + pks.pkey_algo = pk->pkey_algo; + if (!strcmp(pk->pkey_algo, "rsa")) pks.encoding = "pkcs1"; - break; - } + else if (!strcmp(pk->pkey_algo, "ecdsa")) + pks.encoding = "x962"; + else if (!strcmp(pk->pkey_algo, "ecrdsa") || + !strcmp(pk->pkey_algo, "sm2")) + pks.encoding = "raw"; + else + return -ENOPKG; + pks.digest = (u8 *)data; pks.digest_size = datalen; pks.s = hdr->sig;