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This commit adds missing API for ECDH/ECDSA_verify.
from markus
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This commit adds init/free, support for signing, setting and
getting the method, engine support as well as extra data.
from markus
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Based on OpenSSL commit 875ba8b21ecc65ad9a6bdc66971e50
by Billy Brumley, Sohaib ul Hassan and Nicola Tuveri.
ok beck jsing
commit 875ba8b21ecc65ad9a6bdc66971e50461660fcbb
Author: Sohaib ul Hassan <soh.19.hassan@gmail.com>
Date: Sat Jun 16 17:07:40 2018 +0300
Implement coordinate blinding for EC_POINT
This commit implements coordinate blinding, i.e., it randomizes the
representative of an elliptic curve point in its equivalence class, for
prime curves implemented through EC_GFp_simple_method,
EC_GFp_mont_method, and EC_GFp_nist_method.
This commit is derived from the patch
https://marc.info/?l=openssl-dev&m=131194808413635 by Billy Brumley.
Coordinate blinding is a generally useful side-channel countermeasure
and is (mostly) free. The function itself takes a few field
multiplicationss, but is usually only necessary at the beginning of a
scalar multiplication (as implemented in the patch). When used this way,
it makes the values that variables take (i.e., field elements in an
algorithm state) unpredictable.
For instance, this mitigates chosen EC point side-channel attacks for
settings such as ECDH and EC private key decryption, for the
aforementioned curves.
For EC_METHODs using different coordinate representations this commit
does nothing, but the corresponding coordinate blinding function can be
easily added in the future to extend these changes to such curves.
Co-authored-by: Nicola Tuveri <nic.tuv@gmail.com>
Co-authored-by: Billy Brumley <bbrumley@gmail.com>
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com>
Reviewed-by: Andy Polyakov <appro@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6526)
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from Nicola Tuveri (who spotted the omission of ecp_nist.c from the PR).
discussed with jsing
tested by jsg
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after the constant time commits various regress tests started failing
on sparc64 ssh t9, libcrypto ec ecdh ecdsa and trying to ssh out
resulted in 'invalid elliptic curve value'
ok tb@
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the EC module.
From Billy Brumley and his team, via
https://github.com/libressl-portable/openbsd/pull/94
With tweaks from jsing and me.
ok jsing
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Move the "internal" BN functions from bn.h to bn_lcl.h and stop exporting
the bn_* symbols. These are documented as only being intended for internal
use, so why they were placed in a public header is beyond me...
This hides 363 previously exported symbols, most of which exist in headers
that are not installed and were never intended to be public. This also
removes a few crusty old things that should have died long ago (like
_ossl_old_des_read_pw). But don't worry... there are still 3451 symbols
exported from the library.
With input and testing from inoguchi@.
ok beck@ inoguchi@
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Intel. Obtained from BoringSSL, with some integration work borrowed from
OpenSSL 1.0.2; assembler code for arm and sparc64 borrowed from OpenSSL 1.1.0.
None of this code is enabled in libcrypto yet.
ok beck@ jsing@
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