crypto/linux_keyring: add 'secret_keyring' secret object.

Add the ability for the secret object to obtain secret data from the
Linux in-kernel key managment and retention facility, as an extra option
to the existing ones: reading from a file or passing directly as a
string.

The secret is identified by the key serial number. The upper layers
need to instantiate the key and make sure the QEMU process has access
permissions to read it.

Signed-off-by: Alexey Krasikov <alex-krasikov@yandex-team.ru>

 - Fixed up detection logic default behaviour in configure

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

1 files changed, 52 insertions, 0 deletions

diff --git a/include/crypto/secret_keyring.h b/include/crypto/secret_keyring.h
new file mode 100644
index 0000000..9f371ad
--- /dev/null
+++ b/include/crypto/secret_keyring.h
@@ -0,0 +1,52 @@
+/*
+ * QEMU crypto secret support
+ *
+ * Copyright 2020 Yandex N.V.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef QCRYPTO_SECRET_KEYRING_H
+#define QCRYPTO_SECRET_KEYRING_H
+
+#include "qapi/qapi-types-crypto.h"
+#include "qom/object.h"
+#include "crypto/secret_common.h"
+
+#define TYPE_QCRYPTO_SECRET_KEYRING "secret_keyring"
+#define QCRYPTO_SECRET_KEYRING(obj) \
+    OBJECT_CHECK(QCryptoSecretKeyring, (obj), \
+                 TYPE_QCRYPTO_SECRET_KEYRING)
+#define QCRYPTO_SECRET_KEYRING_CLASS(class) \
+    OBJECT_CLASS_CHECK(QCryptoSecretKeyringClass, \
+                       (class), TYPE_QCRYPTO_SECRET_KEYRING)
+#define QCRYPTO_SECRET_KEYRING_GET_CLASS(class) \
+    OBJECT_GET_CLASS(QCryptoSecretKeyringClass, \
+                     (class), TYPE_QCRYPTO_SECRET_KEYRING)
+
+typedef struct QCryptoSecretKeyring QCryptoSecretKeyring;
+typedef struct QCryptoSecretKeyringClass QCryptoSecretKeyringClass;
+
+typedef struct QCryptoSecretKeyring {
+    QCryptoSecretCommon parent;
+    int32_t serial;
+} QCryptoSecretKeyring;
+
+
+typedef struct QCryptoSecretKeyringClass {
+    QCryptoSecretCommonClass parent;
+} QCryptoSecretKeyringClass;
+
+#endif /* QCRYPTO_SECRET_KEYRING_H */