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KEYS: Allow the public_key struct to hold a private key [ver #2]

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Put a flag in the public_key struct to indicate if the structure is holding
a private key.  The private key must be held ASN.1 encoded in the format
specified in RFC 3447 A.1.2.  This is the form required by crypto/rsa.c.

The software encryption subtype's verification and query functions then
need to select the appropriate crypto function to set the key.

Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Denis Kenzior <denkenz@gmail.com>
Tested-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: James Morris <james.morris@microsoft.com>
This commit is contained in:
David Howells 2018-10-09 17:47:31 +01:00 committed by James Morris
parent 82f94f2447
commit f7c4e06e06
2 changed files with 13 additions and 2 deletions
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14
crypto/asymmetric_keys/public_key.c
View File

@ -115,7 +115,12 @@ static int software_key_query(const struct kernel_pkey_params *params,
if (IS_ERR(tfm))
return PTR_ERR(tfm);
ret = crypto_akcipher_set_pub_key(tfm, pkey->key, pkey->keylen);
if (pkey->key_is_private)
ret = crypto_akcipher_set_priv_key(tfm,
pkey->key, pkey->keylen);
else
ret = crypto_akcipher_set_pub_key(tfm,
pkey->key, pkey->keylen);
if (ret < 0)
goto error_free_tfm;
@ -170,7 +175,12 @@ int public_key_verify_signature(const struct public_key *pkey,
if (!req)
goto error_free_tfm;
ret = crypto_akcipher_set_pub_key(tfm, pkey->key, pkey->keylen);
if (pkey->key_is_private)
ret = crypto_akcipher_set_priv_key(tfm,
pkey->key, pkey->keylen);
else
ret = crypto_akcipher_set_pub_key(tfm,
pkey->key, pkey->keylen);
if (ret)
goto error_free_req;

1
include/crypto/public_key.h
View File

@ -25,6 +25,7 @@
struct public_key {
void *key;
u32 keylen;
bool key_is_private;
const char *id_type;
const char *pkey_algo;
};