[SECURITY] Fedora 27 Update: botan2-2.7.0-1.fc27

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Fedora Update Notification
FEDORA-2018-98ab6b4e56
2018-07-11 19:27:57.419836
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Name        : botan2
Product     : Fedora 27
Version     : 2.7.0
Release     : 1.fc27
URL         : https://botan.randombit.net/
Summary     : Crypto and TLS for C++11
Description :
Botan is a BSD-licensed crypto library written in C++. It provides a
wide variety of basic cryptographic algorithms, X.509 certificates and
CRLs, PKCS \#10 certificate requests, a filter/pipe message processing
system, and a wide variety of other features, all written in portable
C++. The API reference, tutorial, and examples may help impart the
flavor of the library. This is the current stable release branch 2.x
of Botan.

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Update Information:

Update Botan2 to 2.7.0.  Focus of this release is on performance and side
channel hardening.  - Address side channels in RSA key generation and ECDSA
signing  - Side channel hardening in many core algorithms (modular
exponentiation, ECC scalar multiply, Karatsuba multiplication, Barrett
reduction, etc) to reduce the risk of future exploitable side channels.  - Many
optimizations for ECC operations, RSA (including key gen), DSA, DH, and XMSS.
Typical speedups vs 2.6.0 is 10 to 40% depending on operation and key size.  -
Add Scrypt password hashing. Also supported is using Scrypt to derive keys for
private key encryption (format compatible with upcoming OpenSSL 1.1.1)  - Add
base32 encoding/decoding  - Plus many bug fixes and smaller enhancements
documented in the [release
notes](https://botan.randombit.net/news.html#version-2-7-0-2018-07-02)
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References:

  [ 1 ] Bug #1591831 - CVE-2018-12435 botan: memory-cache side-channel attack on ECDSA
signatures
        https://bugzilla.redhat.com/show_bug.cgi?id=1591831
  [ 2 ] Bug #1591163 - CVE-2018-0495 openssl: ROHNP - Key Extraction Side Channel in
Multiple Crypto Libraries
        https://bugzilla.redhat.com/show_bug.cgi?id=1591163
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2018-98ab6b4e56' at the command
line. For more information, refer to the dnf documentation available at
http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

All packages are signed with the Fedora Project GPG key. More details on the
GPG keys used by the Fedora Project can be found at
https://fedoraproject.org/keys
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