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using the 1.8 names continues to work.
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precompute only as needed, or will want to access some other expensive
resource or etc.
Change how the secret for generating blinding is done in cases where a
PRNG isn't available. Use the operations public op to hide the secret,
for instance the seed for a DH blinding variable is 2^x mod p.
Make use of being able to mutate internal structures in the RW signer,
since that does have access to a PRNG, so use it to initialize the
blinder on first call to sign().
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Should help against many forms of fault attacks.
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PK_Encryptor_EME and PK_Decryptor_EME; the message recovery is somewhat
implicit in the recovery of the plaintext.
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convert look_pk to simple forwarders.
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Note: blinding is not currently being used for RSA, RW, DH or ElGamal,
which used to have them. This should be added back before release.
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Rename PK_Ops::KA_Operation to PK_Ops::Key_Agreement
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PK_Signing_Key, though for the moment the class remains because there
are a few pieces of code that use it to detect if signatures are
supported, or for passing to functions in look_pk
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performed. Up until now, each key object (eg DSA_PublicKey or
ECDH_PrivateKey) had two jobs: contain the key material, and know how
to perform any operations on that key. However because of a desire to
support alternative implementations (GNU MP, hardware, whatever),
there was a notion of operations, with the key objects containing an
op that they got via engine rather than actually implementing the
underlying algorithms directly.
Now, represent the operation as an abstract interface (typically
mapping a byte string to a byte string), and pass a plain Public_Key&
or Private_Key& to the engine. The engine does any checks it wants (eg
based on name, typeid, key sizes, etc), and either returns nothing
(I'll pass) or a pointer to a new operation that represents signatures
or encryption or what-have-you using that key.
This means that plain key objects no longer contain operations. This
is a major break with the traditional interface. On the other hand,
using these 'bare' operations without padding, KDFs, etc is 99% of the
time a bad idea anyway (and if you really need them, there are options
so you get the bare op but via the pubkey.h interfaces).
Currently this change is only implemented for DH and ECDH (ie, key
agreement algorithms). Additionally the optional engines (gnump and
openssl) have not been updated. I'll probably wait to touch those
until after I can change them all in one go for all algos.
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just toplevel pubkey). This was a convention I realized made sense sometime
on when I was first doing the modularization changes.
Move pkcs8.* and x509_key.* to pk_codecs
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