The strict_rfc3339 Python module provides strict, simple, lightweight RFC3339 (Date and Time on the Internet: Timestamps) procedures.

It enables or aims to:

• Convert UNIX timestamps to and from RFC3339.

• Produce RFC3339 strings with a UTC offset (Z) or with the offset that the C time module reports is the local timezone offset.

• Be simple with minimal dependencies/libraries.

• Avoid timezones as much as possible.

• Be very strict and follow RFC3339.

This small Python module parses various kinds of time expressions.

This package provides some tools to parse human-readable date/time text in Python.

This module parses the most common forms of ISO 8601 date strings (e.g. 2007-01-14T20:34:22+00:00) into datetime objects.

This package provides functionality for utilizing the relativedelta feature from the dateutil library, ensuring calendar precision with aniso8601.

Python library for generating and parsing RFC 3339-compliant timestamps.

Certbot automatically receives and installs X.509 certificates to enable Transport Layer Security (TLS) on servers. It interoperates with the Let’s Encrypt certificate authority (CA), which issues browser-trusted certificates for free.

ACME protocol implementation in Python

mbed TLS, formerly known as PolarSSL, makes it trivially easy for developers to include cryptographic and SSL/TLS capabilities in their (embedded) products, facilitating this functionality with a minimal coding footprint.

OpenSSL is an implementation of SSL/TLS.

OpenSSL is an implementation of SSL/TLS.

This module offers some high level convenience functions for accessing web pages on SSL servers (for symmetry, the same API is offered for accessing http servers, too), an sslcat() function for writing your own clients, and finally access to the SSL api of the SSLeay/OpenSSL package so you can write servers or clients for more complicated applications.

Certbot automatically receives and installs X.509 certificates to enable Transport Layer Security (TLS) on servers. It interoperates with the Let’s Encrypt certificate authority (CA), which issues browser-trusted certificates for free.

GnuTLS is a secure communications library implementing the SSL, TLS and DTLS protocols. It is provided in the form of a C library to support the protocols, as well as to parse and write X.509, PKCS #12, OpenPGP and other required structures.

This package provides Guile bindings to GnuTLS, a library implementation the TLS protocol. It supersedes the Guile bindings that were formerly provided as part of GnuTLS.

OpenSSL is an implementation of SSL/TLS.

The Crypt::OpenSSL::Guess Perl module provides helpers to guess the correct OpenSSL include path. It is intended for use in your Makefile.PL.

Crypt::OpenSSL::RSA does RSA encoding and decoding (using the OpenSSL libraries).

BearSSL is an implementation of the SSL/TLS protocol (RFC 5246) written in C. It aims at being correct and secure. In particular, insecure protocol versions and choices of algorithms are not supported, by design; cryptographic algorithm implementations are constant-time by default. It should also be small, both in RAM and code footprint. For instance, a minimal server implementation may fit in about 20 kilobytes of compiled code and 25 kilobytes of RAM.

This library provides a C99 implementation of SSL/TLS. It is designed to be familiar to users of the widely-used POSIX I/O APIs. It supports blocking, non-blocking, and full-duplex I/O. There are no locks or mutexes.

As it can be difficult to keep track of which encryption algorithms and protocols are best to use, s2n-tls features a simple API to use the latest default set of preferences. Remaining on a specific version for backwards compatibility is also supported.

The wolfSSL embedded SSL library (formerly CyaSSL) is an SSL/TLS library written in ANSI C and targeted for embedded, RTOS, and resource-constrained environments - primarily because of its small size, speed, and feature set. wolfSSL supports industry standards up to the current TLS 1.3 and DTLS 1.2, is up to 20 times smaller than OpenSSL, and offers progressive ciphers such as ChaCha20, Curve25519, NTRU, and Blake2b.

This package provides Guile bindings to GnuTLS, a library implementation the TLS protocol. It supersedes the Guile bindings that were formerly provided as part of GnuTLS.

AWS libcrypto (aws-lc) contains portable C implementations of algorithms needed for TLS and common applications, and includes optimized assembly versions for x86 and ARM.

Crypt::OpenSSL::Bignum provides multiprecision integer arithmetic in Perl.