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authorDaniel P. Berrange <berrange@redhat.com>2015-10-15 12:35:28 +0100
committerDaniel P. Berrange <berrange@redhat.com>2016-03-17 14:41:14 +0000
commitcb730894ae284965e03a40eabbf623b87206777b (patch)
tree9394f77b5d7f285918dc134d61da8630ba0fab68 /crypto/ivgenpriv.h
parent37788f253a4a9ad5f27dae68aee261c784e1fa17 (diff)
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crypto: add support for generating initialization vectors
There are a number of different algorithms that can be used to generate initialization vectors for disk encryption. This introduces a simple internal QCryptoBlockIV object to provide a consistent internal API to the different algorithms. The initially implemented algorithms are 'plain', 'plain64' and 'essiv', each matching the same named algorithm provided by the Linux kernel dm-crypt driver. Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Diffstat (limited to 'crypto/ivgenpriv.h')
-rw-r--r--crypto/ivgenpriv.h49
1 files changed, 49 insertions, 0 deletions
diff --git a/crypto/ivgenpriv.h b/crypto/ivgenpriv.h
new file mode 100644
index 0000000..7b87e02
--- /dev/null
+++ b/crypto/ivgenpriv.h
@@ -0,0 +1,49 @@
+/*
+ * QEMU Crypto block IV generator
+ *
+ * Copyright (c) 2015-2016 Red Hat, Inc.
+ *
+ * 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 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_IVGEN_PRIV_H__
+#define QCRYPTO_IVGEN_PRIV_H__
+
+#include "crypto/ivgen.h"
+
+typedef struct QCryptoIVGenDriver QCryptoIVGenDriver;
+
+struct QCryptoIVGenDriver {
+ int (*init)(QCryptoIVGen *ivgen,
+ const uint8_t *key, size_t nkey,
+ Error **errp);
+ int (*calculate)(QCryptoIVGen *ivgen,
+ uint64_t sector,
+ uint8_t *iv, size_t niv,
+ Error **errp);
+ void (*cleanup)(QCryptoIVGen *ivgen);
+};
+
+struct QCryptoIVGen {
+ QCryptoIVGenDriver *driver;
+ void *private;
+
+ QCryptoIVGenAlgorithm algorithm;
+ QCryptoCipherAlgorithm cipher;
+ QCryptoHashAlgorithm hash;
+};
+
+
+#endif /* QCRYPTO_IVGEN_PRIV_H__ */