These functions are declared without arguments, passing arguments to them
causes warnings such as the following with newer compilers:
passing arguments to 'return_null' without a prototype is deprecated in all versions of C and is not supported in C2x [-Werror,-Wdeprecated-non-prototype]
We only use them via function pointers, which doesn't trigger any warnings
and hopefully continues to work.
Newer curl versions (as used on macOS via Homebrew) add attributes like
__attribute__ ((format(printf, a, b)))
to their `curl_*printf*` functions, which fails if we redefine `printf`
as e.g. `builtin_printf` (pulled in via library.h). We could disable
these checks via CURL_NO_FMT_CHECKS, but reordering the headers should
do the trick as well.
Bison generates code that only increases the yynerrs counter, it's never
read. This causes a warning in newer compilers (in particular clang).
Newer versions of bison mark yynerrs with __attribute__((unused)), but
at least on FreeBSD 14 that's not yet available.
systemd seems to use this and if we indirectly use libraries provided
by it, which can e.g. happen via getgrnam_r() and nss-systemd, this may
be called on pointers returned by leak detective's malloc(), which will
not point to the original start of the block and cause a segmentation
fault.
Closesstrongswan/strongswan#2045
Fixes a regression with handling OCSP error responses and adds a new
option to specify the length of nonces in OCSP requests. Also adds some
other improvements for OCSP handling and fuzzers for OCSP
requests/responses.
Closesstrongswan/strongswan#2011
Some servers might not support a length of 32 and return a malformed
request error. Lowering the value to the previous default of 16 could
help in that case.
The two OPTs that were used previously allowed to omit it completely (hence
the fallback to ID_ANY), but that's invalid, so it's better to fail
parsing.
The has_issuer() and issued_by() methods relied on it to be defined, so
if the OCSP response wasn't successful (i.e. OCSP status indicates an
error and no OCSP response is parsed), a null-pointer dereference was
caused if the caller checked if the OCSP response was issued by a
specific certificate.
That's a side-effect of the referenced commit. Previously, error codes
caused the OCSP response to not get parsed successfully, which technically
wasn't correct as it's well formed and successfully parsed, it's just
indicating an error state.
Fixes: 00ab8d62c0 ("x509: Support generation of OCSP responses")
Seems this was forgotten in the referenced commit and actually could lead
to a buffer overflow. Since charon-tkm is untrusted this isn't that
much of an issue but could at least be easily exploited for a DoS attack
as DH public values are set when handling IKE_SA_INIT requests.
Fixes: 0356089d0f ("diffie-hellman: Verify public DH values in backends")
Fixes: CVE-2023-41913
Instead of the CA certificate's subjectKeyIdentifier erroneously
the CA's authorityKeyIdentifier was used as the authorityKeyIdentfier
of the certificate to be issued. This might work with a root CA
where the authorityKeyIdentifier equals its subjectKeyIdentfier
but introduces a severe regression when an intermediate CA is used.
Adds support for multiple OCSP responders in `pki --ocsp` and one that
is based on OpenSSL-style index.txt files. The parser for these files
also accepts simplified files that only specify the status, serial number
and optional revocation date/reason. The OCSP test scenarios are also
updated to use this OCSP responder including one that shows the multi-CA
capabilities of the --ocsp command and the --index option.
The only exception is the ikev2/ocsp-no-signer-cert scenario as the
pki command won't sign an OCSP response with a certificate that isn't
the CA certificate or marked as an OCSP signer.
Registered OCSP responders should return VALIDATION_SKIPPED for issuer
certificates they are not responsible for. However, VALIDATION_FAILED is
currently treated the same way, so that's fine as well.
Implements a new --ocsp command for the pki tool that can produce OCSP
responses based on information provided by a plugin. A first plugin
that accesses the OpenXPKI database is also added.
Closesstrongswan/strongswan#1958
Tobias Brunner