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crypto: add support for querying parameters for block encryption

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When creating new block encryption volumes, we accept a list of
parameters to control the formatting process. It is useful to
be able to query what those parameters were for existing block
devices. Add a qcrypto_block_get_info() method which returns a
QCryptoBlockInfo instance to report this data.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 1469192015-16487-2-git-send-email-berrange@redhat.com
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Daniel P. Berrange 2016-07-22 13:53:34 +01:00 • committed by Max Reitz
parent 54a16a63d0
commit 40c8502822
5 changed files with 191 additions and 0 deletions
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16
include/crypto/block.h
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@ -138,6 +138,22 @@ QCryptoBlock *qcrypto_block_create(QCryptoBlockCreateOptions *options,
void *opaque,
Error **errp);
/**
* qcrypto_block_get_info:
* @block: the block encryption object
* @errp: pointer to a NULL-initialized error object
*
* Get information about the configuration options for the
* block encryption object. This includes details such as
* the cipher algorithms, modes, and initialization vector
* generators.
*
* Returns: a block encryption info object, or NULL on error
*/
QCryptoBlockInfo *qcrypto_block_get_info(QCryptoBlock *block,
Error **errp);
/**
* @qcrypto_block_decrypt:
* @block: the block encryption object