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crypto: add support for generating initialization vectors

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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>
This commit is contained in:
Daniel P. Berrange 2015-10-15 12:35:28 +01:00
parent 37788f253a
commit cb730894ae
14 changed files with 873 additions and 0 deletions
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19
qapi/crypto.json
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@ -78,3 +78,22 @@
{ 'enum': 'QCryptoCipherMode',
'prefix': 'QCRYPTO_CIPHER_MODE',
'data': ['ecb', 'cbc']}
##
# QCryptoIVGenAlgorithm:
#
# The supported algorithms for generating initialization
# vectors for full disk encryption. The 'plain' generator
# should not be used for disks with sector numbers larger
# than 2^32, except where compatibility with pre-existing
# Linux dm-crypt volumes is required.
#
# @plain: 64-bit sector number truncated to 32-bits
# @plain64: 64-bit sector number
# @essiv: 64-bit sector number encrypted with a hash of the encryption key
# Since: 2.6
##
{ 'enum': 'QCryptoIVGenAlgorithm',
'prefix': 'QCRYPTO_IVGEN_ALG',
'data': ['plain', 'plain64', 'essiv']}