1a5a33396d
do_decrypt_cek_rsa() calls EVP_PKEY_decrypt with RSA_PKCS1_PADDING for RSA1_5 and returns failure (goto end) on decrypt error. This creates a measurable timing difference between "padding invalid" (fast exit before content decryption) and "padding valid + AEAD tag fail" (full AES-GCM/CBC decryption path), exposing the RSA private key to a Bleichenbacher-style adaptive attack requiring ~10^4-10^6 queries. Fix: On RSA_PKCS1_PADDING failure, fill decrypted_cek with random bytes of the buffer size and return success (retval=0). This forces execution into decrypt_ciphertext() regardless of padding validity, so the attacker cannot distinguish valid from invalid padding via timing. The AEAD tag check in decrypt_ciphertext() will still reject the wrong CEK, but the timing profile is identical for both branches. RSA-OAEP variants are not affected (mathematically infeasible to craft valid ciphertext without the private key). Introduced by RSA1_5 path lacking constant-time fallback. |
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HAProxy
HAProxy is a free, very fast and reliable reverse-proxy offering high availability, load balancing, and proxying for TCP and HTTP-based applications.
Installation
The INSTALL file describes how to build HAProxy. A list of packages is also available on the wiki.
Getting help
The discourse and the mailing-list are available for questions or configuration assistance. You can also use the slack or IRC channel. Please don't use the issue tracker for these.
The issue tracker is only for bug reports or feature requests.
Documentation
The HAProxy documentation has been split into a number of different files for ease of use. It is available in text format as well as HTML. The wiki is also meant to replace the old architecture guide.
Please refer to the following files depending on what you're looking for:
- INSTALL for instructions on how to build and install HAProxy
- BRANCHES to understand the project's life cycle and what version to use
- LICENSE for the project's license
- CONTRIBUTING for the process to follow to submit contributions
The more detailed documentation is located into the doc/ directory:
- doc/intro.txt for a quick introduction on HAProxy
- doc/configuration.txt for the configuration's reference manual
- doc/lua.txt for the Lua's reference manual
- doc/SPOE.txt for how to use the SPOE engine
- doc/network-namespaces.txt for how to use network namespaces under Linux
- doc/management.txt for the management guide
- doc/regression-testing.txt for how to use the regression testing suite
- doc/peers.txt for the peers protocol reference
- doc/coding-style.txt for how to adopt HAProxy's coding style
- doc/internals for developer-specific documentation (not all up to date)
License
HAProxy is licensed under GPL 2 or any later version, the headers under LGPL 2.1. See the LICENSE file for a more detailed explanation.