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Some past security reviews carried out for UEFI Secure Boot signing
submissions have covered specific drivers or functional areas of iPXE.
Mark all of the files comprising these areas as permitted for UEFI
Secure Boot.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Now that public-key algorithms use ASN.1 builders to dynamically
allocate the output data, there is no further need for callers to be
able to determine the maximum output length.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Instances of cipher and digest algorithms tend to get called
repeatedly to process substantial amounts of data. This is not true
for public-key algorithms, which tend to get called only once or twice
for a given key.
Simplify the public-key algorithm API so that there is no reusable
algorithm context. In particular, this allows callers to omit the
error handling currently required to handle memory allocation (or key
parsing) errors from pubkey_init(), and to omit the cleanup calls to
pubkey_final().
This change does remove the ability for a caller to distinguish
between a verification failure due to a memory allocation failure and
a verification failure due to a bad signature. This difference is not
material in practice: in both cases, for whatever reason, the caller
was unable to verify the signature and so cannot proceed further, and
the cause of the error will be visible to the user via the return
status code.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Asymmetric keys are invariably encountered within ASN.1 structures
such as X.509 certificates, and the various large integers within an
RSA key are themselves encoded using ASN.1.
Simplify all code handling asymmetric keys by passing keys as a single
ASN.1 cursor, rather than separate data and length pointers.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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The GCM cipher mode of operation (in common with other counter-based
modes of operation) has a notion of blocksize that does not neatly
fall into our current abstraction: it does operate in 16-byte blocks
but allows for an arbitrary overall data length (i.e. the final block
may be incomplete).
Model this by adding a concept of alignment size. Each call to
encrypt() or decrypt() must begin at a multiple of the alignment size
from the start of the data stream. This allows us to model GCM by
using a block size of 1 byte and an alignment size of 16 bytes.
As a side benefit, this same concept allows us to neatly model the
fact that raw AES can encrypt only a single 16-byte block, by
specifying an alignment size of zero on this cipher.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Some ciphers (such as GCM) support the concept of a tag that can be
used to authenticate the encrypted data. Add a cipher method for
generating an authentication tag.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Relicense files for which I am the sole author (as identified by
util/relicense.pl).
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Suggested-by: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Access to the gpxe.org and etherboot.org domains and associated
resources has been revoked by the registrant of the domain. Work
around this problem by renaming project from gPXE to iPXE, and
updating URLs to match.
Also update README, LOG and COPYRIGHTS to remove obsolete information.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Add FILE_LICENCE declarations to almost all files that make up the
various standard builds of gPXE.
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The various types of cryptographic algorithm are fundamentally
different, and it was probably a mistake to try to handle them via a
single common type.
pubkey_algorithm is a placeholder type for now.
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