By pre-multiplying the input arrays with a linear phase the
fast multiplication via FFT and inverse FFT computes a negative
wrapped convolution corresponding to a modulus of x^n+1.
While RFC 5280 is not very specific about the matching rules of subjectAltNames,
it has some examples how to match email and FQDN constraints. We try to follow
these examples, and restrict DNS names to subdomain matching and email to
full email, host or domain matching.
Instead of rejecting the certificate completely if a certificate has a policy
OID that is actually not allowed by the issuer CA, we accept it. However, the
certificate policy itself is still considered invalid, and is not returned
in the auth config resulting from trust chain operations.
A user must make sure to rely on the returned auth config certificate policies
instead of the policies contained in the certificate; even if the certificate
is valid, the policy OID itself in the certificate are not to be trusted
anymore.
To use SSL in curl, we need to initialize the SSL library in a thread-safe
manner and provide the appropriate callbacks. As we already do that in our
crypto plugins using these libraries, we depend on these features.
This implies that we need the same plugin enabled (openssl, gcrypt) as the
curl backend is configured to use to fetch from HTTPS URIs.
Starting with libgcrypt 1.6, it seems that custom locking functions are not
supported anymore. Instead, the user has to select from one of the pre-defined
set of locking functions.
Given that we have a proper threading abstraction API with optional profiling
on all platforms, this is somewhat annoying. However, there does not seem to be
a way to use custom functions, and we have no other choice than using the
provided macro magic to support all libgcrypt versions.
Fixes#630.
On Fedora, SELinux complains about these open file descriptors when the
updown script invokes iptables. While it seems difficult to set the flag
on all file descriptors, this at least fixes those covered by the SELinux
policy.
As these two cases are in code executed while the daemon is still single
threaded, we avoid the use of atomic but not fully portable fdopen("e") or
open(O_CLOEXEC) calls.
Fixes#519.
In addition that this lets AC generation fail properly if private key signing
fails, it also fixes an issue when compiling on Windows with MinGW 4.8.1, where
for some reason the attributeCertificateInfo got encoded incorrectly.
If FIPS mode has been enabled by other means, under some environments it can't
be entered again. It fails with "FIPS mode already set". To avoid it, we first
check the mode before changing it.
As the mysql_config script is not available for Windows, we use a hardcoded
library name and no additional CFLAGS. This builds fine against the binary
MySQL Connector/C distribution.
These definitions are directly derived from the RFC, so it should be safe
to cast them. clang complains about the different types, so cast them
explicitly.
The AES code historically has different build options for various size/speed
trade-offs. We never made use of them, so just drop the obsolete code. The code
now has four hard-coded fixed tables, both inverse and original.
The salt, or often called implicit nonce, varies between AEAD algorithms and
their use in protocols. For IKE and ESP, GCM uses 4 bytes, while CCM uses
3 bytes. With TLS, however, AEAD mode uses 4 bytes for both GCM and CCM.
Our GCM backends currently support 4 bytes and CCM 3 bytes only. This is fine
until we go for CCM mode support in TLS, which requires 4 byte nonces.
To avoid considering each cached OCSP response and evaluating its trustchain,
we limit the certificates considered for OCSP signing to:
- The issuing CA of the checked certificate
- A directly delegated signer by the same CA, having the OCSP signer constraint
- Any locally installed (trusted) certificate having the OCSP signer constraint
The first two options cover the requirements from RFC 6960 2.6. For
compatibility with non-conforming CAs, we allow the third option as exception,
but require the installation of such certificates locally.
Andreas Steffen