sslyze
OpenSSL
sslyze | OpenSSL | |
---|---|---|
10 | 150 | |
3,144 | 24,186 | |
- | 0.8% | |
7.5 | 9.9 | |
3 days ago | 7 days ago | |
Python | C | |
GNU Affero General Public License v3.0 | Apache License 2.0 |
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sslyze
- Tool to check whether 0-RTT is enabled or not
- SSL Diag Tool
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Ways to test SSL Certificates
For Internally and Externally accessible websites – Can use hostname or IP address Sslyze command line tool - https://github.com/nabla-c0d3/sslyze/releases - current version is 4.1.0
- SSL / TLS scanning utility (internal) ?
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ERR_SSL_VERSION_OR_CIPHER_MISMATCH
3) If you are technically skilled then there are programs/scripts you can run that will tell you exactly what TLS/SSL settings your router supports by scanning it. I have used https://github.com/nabla-c0d3/sslyze in the past but that was a long time ago so not sure it still works well
- the "best" ciphers
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sslyze VS cryptolyzer - a user suggested alternative
2 projects | 24 Jan 2022
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CryptoLyzer: A comprehensive cryptographic settings analyzer
There are many notable open-source projects (SSLyze, CipherScan, testssl.sh, tls-scan, …) and several SaaS solutions (CryptCheck, CypherCraft, Hardenize, ImmuniWeb, Mozilla Observatory, SSL Labs, …) to do a security setting analysis, especially when we are talking about TLS, which is the most common and popular cryptographic protocol. However, most of these tools heavily depend on one or more versions of one or more cryptographic protocol libraries, like GnuTLS, OpenSSL, or wolfSSL. But why is this such a problem?
- Create a tool to capture the TLS handshake and cipher suite being used
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Awesome Penetration Testing
SSLyze - Fast and comprehensive TLS/SSL configuration analyzer to help identify security mis-configurations.
OpenSSL
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RVM Ruby 2.6.0 — built with custom openssl version on Ubuntu 22.04
ENV OPENSSL_PREFIX=/opt/openssl ENV SSL_CERT_FILE=/etc/ssl/certs/ca-certificates.crt WORKDIR /tmp RUN git clone --branch OpenSSL_1_0_2n https://github.com/openssl/openssl.git RUN cd openssl RUN ./config shared --prefix=$OPENSSL_PREFIX --openssldir=$OPENSSL_PREFIX/ssl RUN make RUN make install RUN rvm install 2.6.0 -C --with-openssl-dir=$OPENSSL_PREFIX ENV PATH /usr/local/rvm/bin:$PATH RUN rvm --default use ruby-2.6.0 ENV PATH /usr/local/rvm/bin:/usr/local/rvm/rubies/ruby-2.6.0/bin:$PATH ENV GEM_HOME /usr/local/rvm/rubies/ruby-2.6.0/lib/ruby/gems/2.6.0
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Heartbleed and XZ Backdoor Learnings: Open Source Infrastructure Can Be Improved Efficiently With Moderate Funding
Today, April 7th, 2024, marks the 10-year anniversary since CVE-2014-0160 was published. This security vulnerability known as "Heartbleed" was a flaw in the OpenSSL cryptography software, the most popular option to implement Transport Layer Security (TLS). In more layman's terms, if you type https:// in your browser address bar, chances are high that you are interacting with OpenSSL.
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Ask HN: How does the xz backdoor replace RSA_public_decrypt?
At this point I pretty much understand the entire process on how the xz backdoor came to be: its execution stages, extraction from binary "test" files etc. But one thing puzzles me: how can the ifunc mechanism be used to replace something like RSA_public_decrypt? Granted this probably stems from my lack of understanding of ifunc, but I was under the impression that in order for the ifunc mechanism to work in your code, you have to explicitly mark specific function with multiple implementations with __attribute__ ((ifunc ("the_resolver_function"))). Looking at the source code of the RSA function in question, ifunc attribute isn't present:
https://github.com/openssl/openssl/blob/master/crypto/rsa/rsa_crpt.c#L51
So how does the backdoor actually replace the call? Does this means that the ifunc mechanism can be used to override pretty much anything on the system?
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Use of HTTPS Resource Records
OpenSSL and Go crypt/tls has no support yet, so none of the webservers that depend on them support it. Apache, Nginx, and Caddy, they all need upstream ECH support first.
- https://github.com/openssl/openssl/issues/7482
- https://github.com/openssl/openssl/pull/22938
- https://github.com/golang/go/issues/63369
- openssl-3.2.0 released
- Large performance degradation in OpenSSL 3
- OpenSSL 3.2 Alpha 2
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Encrypted Client Hello – the last puzzle piece to privacy
If I'm understanding the draft correctly, I think the webserver you're hosting your sites on would need it implemented as it requires private keys and ECH configuration. In the example of nginx since it uses openssl, openssl would need to implement it. I found an issue on their Github but it's still open: https://github.com/openssl/openssl/issues/7482
- eBPF Practical Tutorial: Capturing SSL/TLS Plain Text Data Using uprobe
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OpenSSL Versions... whats the plan here
I confirmed that the systm was on 1.1.1f with openssl version command. Hmm...... I check the openssl version in the repo with apt list... LOL package names wernt helpful. finally went to the repo pages and found that its still on 1.1.1f, https://launchpad.net/ubuntu/+source/openssl. Meenwhile I looked up the version history on https://www.openssl.org/ and saw that 1.1.1v was released at the beginning of this month... ok. I can understand it it was out less then 30 days. I looked up when f came out, end of MARCH 2020. NEARLY 3-1/2 YEARS
What are some alternatives?
sslscan - sslscan tests SSL/TLS enabled services to discover supported cipher suites
GnuTLS - GnuTLS
RustScan - 🤖 The Modern Port Scanner 🤖
Crypto++ - free C++ class library of cryptographic schemes
aioquic - QUIC and HTTP/3 implementation in Python
mbedTLS - An open source, portable, easy to use, readable and flexible TLS library, and reference implementation of the PSA Cryptography API. Releases are on a varying cadence, typically around 3 - 6 months between releases.
tls-scan - An Internet scale, blazing fast SSL/TLS scanner ( non-blocking, event-driven )
libsodium - A modern, portable, easy to use crypto library.
scapy - Scapy: the Python-based interactive packet manipulation program & library. Supports Python 2 & Python 3.
LibreSSL - LibreSSL Portable itself. This includes the build scaffold and compatibility layer that builds portable LibreSSL from the OpenBSD source code. Pull requests or patches sent to [email protected] are welcome.
simpleeval - Simple Safe Sandboxed Extensible Expression Evaluator for Python
cfssl - CFSSL: Cloudflare's PKI and TLS toolkit