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| author |   Stefan Berger <stefanb@linux.ibm.com> | 2021-06-29 17:34:21 -0400 |
|---|---|---|
| committer |   Jarkko Sakkinen <jarkko@kernel.org> | 2021-08-23 19:55:42 +0300 |
| commit | a4aed36ed5924a05ecfadc470584188bfba2b928 (patch) | |
| tree | fa716ef69d3f3ff29aeae2019b6c74164eac5557 /crypto | |
| parent | certs: Trigger creation of RSA module signing key if it's not an RSA key (diff) | |
| download | linux-dev-a4aed36ed5924a05ecfadc470584188bfba2b928.tar.xz linux-dev-a4aed36ed5924a05ecfadc470584188bfba2b928.zip | |
certs: Add support for using elliptic curve keys for signing modules
Add support for using elliptic curve keys for signing modules. It uses
a NIST P384 (secp384r1) key if the user chooses an elliptic curve key
and will have ECDSA support built into the kernel.
Note: A developer choosing an ECDSA key for signing modules should still
delete the signing key (rm certs/signing_key.*) when building an older
version of a kernel that only supports RSA keys. Unless kbuild automati-
cally detects and generates a new kernel module key, ECDSA-signed kernel
modules will fail signature verification.
Cc: David Howells <dhowells@redhat.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Tested-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/asymmetric_keys/pkcs7_parser.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/crypto/asymmetric_keys/pkcs7_parser.c b/crypto/asymmetric_keys/pkcs7_parser.c index 967329e0a07b..6592279d839a 100644 --- a/crypto/asymmetric_keys/pkcs7_parser.c +++ b/crypto/asymmetric_keys/pkcs7_parser.c @@ -269,6 +269,14 @@ int pkcs7_sig_note_pkey_algo(void *context, size_t hdrlen, ctx->sinfo->sig->pkey_algo = "rsa"; ctx->sinfo->sig->encoding = "pkcs1"; break; + case OID_id_ecdsa_with_sha1: + case OID_id_ecdsa_with_sha224: + case OID_id_ecdsa_with_sha256: + case OID_id_ecdsa_with_sha384: + case OID_id_ecdsa_with_sha512: + ctx->sinfo->sig->pkey_algo = "ecdsa"; + ctx->sinfo->sig->encoding = "x962"; + break; default: printk("Unsupported pkey algo: %u\n", ctx->last_oid); return -ENOPKG; |