FiloSottile

A simple zero-config tool to make locally trusted development certificates with any names you'd like.

A simple, modern and secure encryption tool (and Go library) with small explicit keys, no config options, and UNIX-style composability.

yubikey-agent is a seamless ssh-agent for YubiKeys.

A checker (site and tool) for CVE-2014-0160

A ssh server that knows who you are. $ ssh whoami.filippo.io

gvt was a minimal go vendoring tool, based on gb-vendor. Today, you want to use modules instead.

A dedicated Chrome instance to log into captive portals without messing with DNS settings.

A Certificate Transparency log implementation and monitoring API designed for scalability, ease of operation, and reduced cost.

Simple test for the May 2016 OpenSSL padding oracle (CVE-2016-2107)

Check that all your Go dependencies are properly vendored

filippo.io/edwards25519 — A safer, faster, and more powerful low-level edwards25519 Go implementation.

A Go implementation of the quantum-resistant key encapsulation method ML-KEM (formerly known as Kyber).

Wrapper for curve25519-dalek using rustgo, a technique to directly call Rust code from Go programs with near-zero overhead, meant to replace manually written assembly.

Tools to process Go trace logs into various profiles. Complement for "go tool trace".

A minimal portable Zcash z-address generator for offline / paper wallets

A Go implementation of the BERserk attack against Mozilla NSS ASN.1 parsing of PKCS#1 RSA signatures with e = 3. Complete of a certificate generation tool, works with CAs in the trust store.

Library and tools to interact with and analyze Tor HSDirs.

Exploiting ECDSA Failures in the Bitcoin Blockchain

Package filippo.io/intermediates embeds a bundle of known unexpired, unrevoked intermediate certificates chaining to roots in the Mozilla Root Program

Some code to bruteforce OpenBSD softraid encrypted drives - NOT A READY-TO-USE TOOL

Extract the import path of Go binaries and rebuild them. No more stale GOROOT.

NIST P elliptic curves (re-exported from crypto/internal/nistec)