Because with the introduction of EC-RDSA and change in workings of RSA
in regard to sign/verify, akcipher may have not all callbacks defined,
report to keyctl only actually supported ops determined by the presence
of the akcipher callbacks.
Cc: David Howells <dhowells@xxxxxxxxxx>
Cc: keyrings@xxxxxxxxxxxxxxx
Signed-off-by: Vitaly Chikunov <vt@xxxxxxxxxxxx>
---
crypto/asymmetric_keys/public_key.c | 16 +++++++++++-----
1 file changed, 11 insertions(+), 5 deletions(-)
diff --git a/crypto/asymmetric_keys/public_key.c b/crypto/asymmetric_keys/public_key.c
index f5d85b47fcc6..c2e4e73fcf06 100644
--- a/crypto/asymmetric_keys/public_key.c
+++ b/crypto/asymmetric_keys/public_key.c
@@ -130,11 +130,17 @@ static int software_key_query(const struct kernel_pkey_params *params,
info->max_sig_size = len;
info->max_enc_size = len;
info->max_dec_size = len;
- info->supported_ops = (KEYCTL_SUPPORTS_ENCRYPT |
- KEYCTL_SUPPORTS_VERIFY);
- if (pkey->key_is_private)
- info->supported_ops |= (KEYCTL_SUPPORTS_DECRYPT |
- KEYCTL_SUPPORTS_SIGN);
+ info->supported_ops = 0;
+ if (crypto_akcipher_alg(tfm)->verify)
+ info->supported_ops |= KEYCTL_SUPPORTS_VERIFY;
+ if (crypto_akcipher_alg(tfm)->encrypt)
+ info->supported_ops |= KEYCTL_SUPPORTS_ENCRYPT;
+ if (pkey->key_is_private) {
+ if (crypto_akcipher_alg(tfm)->decrypt)
+ info->supported_ops |= KEYCTL_SUPPORTS_DECRYPT;
+ if (crypto_akcipher_alg(tfm)->sign)
+ info->supported_ops |= KEYCTL_SUPPORTS_SIGN;
+ }
ret = 0;
error_free_tfm:
--
2.11.0
