nettle | forked from https : //git.lysator.liu.se/nettle/nettle.git | Cryptography library

by breadwallet C Version: Current License: LGPL-3.0

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | nettle Summary

nettle is a C library typically used in Security, Cryptography applications. nettle has no bugs, it has a Weak Copyleft License and it has low support. However nettle has 6 vulnerabilities. You can download it from GitHub.

what is gnu nettle? a quote from the introduction in the nettle manual:. nettle is a cryptographic library that is designed to fit easily in more or less any context: in crypto toolkits for object-oriented languages (c++, python, pike, ...), in applications like lsh or gnupg, or even in kernel space. in most contexts, you need more than the basic cryptographic algorithms, you also need some way to keep track of available algorithms, their properties and variants. you often have some algorithm selection process, often dictated by a protocol you want to implement. and as the requirements of applications differ in subtle and not so subtle ways, an api that fits one application well can be a pain to use in a different context. and that is why there are so many different cryptographic libraries around. nettle tries to avoid this problem by doing one thing, the low-level crypto stuff, and providing a simple but general interface to it. in particular, nettle doesn't do algorithm selection. it doesn't do memory

Support

Quality

Security

License

Reuse

Support

nettle has a low active ecosystem.

It has 15 star(s) with 19 fork(s). There are 7 watchers for this library.

It had no major release in the last 6 months.

There are 2 open issues and 0 have been closed. There are 2 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of nettle is current.

Quality

nettle has 0 bugs and 0 code smells.

Security

nettle has 6 vulnerability issues reported (3 critical, 2 high, 1 medium, 0 low).

nettle code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

nettle is licensed under the LGPL-3.0 License. This license is Weak Copyleft.

Weak Copyleft licenses have some restrictions, but you can use them in commercial projects.

Reuse

nettle releases are not available. You will need to build from source code and install.

It has 674 lines of code, 16 functions and 6 files.

It has high code complexity. Code complexity directly impacts maintainability of the code.

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nettle Key Features

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nettle Examples and Code Snippets

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Community Discussions

Trending Discussions on nettle

nettle curve25519 key exchange

Why doesn't `conda env export` list all pip packages?

Conda - how to update only cudatoolkit in an existing environment?

I constantly get ResolvePackageNotFound

I'm trying to use stringr, specifically regex, to cut up "MA: Bristol County (25005)"

Problem installing S3FS on the RHEL 6 system

Use dplyr to calculate percentage and frequency of occurrence of two groups

RIDK MSYS Key failing

Making a Python Project work on another Mac

Why is my `brew list` gets populated b unknown libraries and how do I get rid of them?

QUESTION

nettle curve25519 key exchange

Asked 2021-Aug-02 at 09:23

I'm trying to understand how to implement key exchange using nettle's curve25519 functions. I'm writing an software that establishes encrypted TCP connection with public key based authentication. The client and server programs share the same code base.

This is an hobby project to learn network and crypto programming. :-)

I have working toy app using nettle's rsa_encrypt function, but there is no equivalent to curve25519 from what I see. How do I do key exchange using nettle's curve25519 functions?

And to be clear, I know I could and probably should simply use any production quality TLS library like openssl, but I want to learn how to do encrypted TCP connection from scratch. Using TLS library would defeat that purpose. I compared many crypto libraries and found nettle as most easily approachable since it is low level.

...

ANSWER

Answered 2021-Aug-02 at 09:23

Elliptic curves, generally, are used for key 'agreement' rather than key 'exchange'.

I don't know how much you know about this so I'll briefly explain:

RSA - we generate a random symmetric key, encrypt it with the public key of the recipient, who themselves later decrypts and uses it.
ECC (Elliptic curve crypto) - we use a process called Elliptic Curve Diffie-Hellman, due to the commutative nature of the multiplication of curve points, we can establish the same point on the curve by multiplying theirPublicKeyPoint * ourPrivateKeyPoint * G, where G is the curves base point.

So, in summary:

I greatly encourage you to use ECDH instead of RSA.
You need to find a function to perform ECDH over curve25519, also known as x25519, nettle's function is this.
After the process of ECDH, we end up with another point on the curve. :) - which we hash the x co-ordinate of to generate the symmetric key. Though this is usually done by the lib.

Source https://stackoverflow.com/questions/68593838

QUESTION

Why doesn't `conda env export` list all pip packages?

Asked 2021-Mar-28 at 09:18

To list all of the packages in my active environment in a format that resembles pip freeze:

...

ANSWER

Answered 2021-Mar-28 at 09:05

conda only keeps track of the packages it installed
pip freeze will give you the packages that were either installed using pip package manager or they used setuptools in their setup.py so conda build generated the egg information.

conda vs pip

Downgrading the pip may fix this issue, you can check this out: conda issues

Source https://stackoverflow.com/questions/66839700

QUESTION

Conda - how to update only cudatoolkit in an existing environment?

Asked 2021-Mar-22 at 03:02

This is a specific instance of a general problem that I run into when updating packages using conda. I have an environment that is working great on machine A. I want to transfer it to machine B. But, machine A has GTX1080 gpus, and due to configuration I cannot control, requires cudatoolkit 10.2. Machine B has A100 gpus, and due to configuration I cannot control, requires cudatoolkit 11.1

I can easily export Machine A's environment to yml, and create a new environment on Machine B using that yml. However, I cannot seem to update cudatoolkit to 11.1 on that environment on Machine B. I try

...

ANSWER

Answered 2021-Mar-22 at 03:02

Overly-Restrictive Constraints

I'd venture the issue is that recreating from a YAML that includes versions and builds will establish those versions and builds as explicit specifications for that environment moving forward. That is, Conda will regard explicit specifications as hard requirements that it cannot mutate and so if even a single one of the dependencies of cudatoolkit also needs to be updated in order to use version 11, Conda will not know how to satisfy it without violating those previously specified constraints.

Specifically, this is what I see when searching (assuming linux-64 platform):

Source https://stackoverflow.com/questions/66734416

QUESTION

I constantly get ResolvePackageNotFound

Asked 2021-Jan-17 at 05:16

When I type conda env create -f environment.yml

I constantly get

...

ANSWER

Answered 2021-Jan-15 at 14:57

Conda does not work well with large environments in which everything pinned to specific versions (in contrast to other ecosystems in which pinning everything is the standard). The result of conda env export, which is what this probably is, here also includes the build numbers, which are almost always too specific (and often platform-specific) for the purpose of installing the right version of the software. It's great for things like reproducibility of scientific work (specific versions and builds of everything need to be known), but not great for installing software (there is plenty of flexibility in versions that should work with any package).

I'd start by removing the build pins (dropping everything after the second = in each line) so that only the versions are pinned. After that, I'd start removing version pins.

Source https://stackoverflow.com/questions/65735532

QUESTION

I'm trying to use stringr, specifically regex, to cut up "MA: Bristol County (25005)"

Asked 2020-Nov-24 at 02:54

I'm trying to take a variable column and cut it up into several columns. The values follow a basic pattern with the county name having a variety of lengths and formats.

...

ANSWER

Answered 2020-Nov-24 at 02:44

Use str_match_all:

Source https://stackoverflow.com/questions/64979357

QUESTION

Problem installing S3FS on the RHEL 6 system

Asked 2020-Nov-17 at 18:17

We're trying to move off a physical RHEL 6 server, with the help of some S3 storage. I'm following the special RHEL 6 install process call out in the install instructions. The fuse 2.8.4 install appears to work but when I try to install s3fs it appears to fail.

Is there some other steps I need to make sure are installed, other then those in the install instructions?

...

ANSWER

Answered 2020-Aug-09 at 02:05

s3fs master branch requires a newer kernel and glibc:

https://github.com/s3fs-fuse/s3fs-fuse/issues/1354

You can work around this by compiling s3fs 1.86 instead.

Source https://stackoverflow.com/questions/63303833

QUESTION

Use dplyr to calculate percentage and frequency of occurrence of two groups

Asked 2020-Oct-28 at 20:40

I'm learning dplyr and have searched for solutions from similar posts but found none with this combination of problems.

Here is an example data frame:

...

ANSWER

Answered 2020-Oct-28 at 20:40

Not sure whether I got you right but maybe this is what you are looking for:

Source https://stackoverflow.com/questions/64580507

QUESTION

RIDK MSYS Key failing

Asked 2020-Sep-13 at 06:43

I want to develop and run a ruby on rails web app on my Bootcamp windows Mac laptop. I am using rubyinstaller and railsinstaller, but the installation breaks always at some PGP key check which I have no idea about.

Facing issue while trying to install ruby installer

...

ANSWER

Answered 2020-Sep-13 at 06:43

1st for RIDK, just run 1,3 enter when instalation

2nd for SQLite3 issue, follow the following link solution of reducing sqlite version in gem file and running "bundle install" Rails error on windows 10 (An error occurred while installing sqlite3 (1.4.1), and Bundler cannot continue)

Source https://stackoverflow.com/questions/63804092

QUESTION

Making a Python Project work on another Mac

Asked 2020-Aug-20 at 22:05

I have a python project with a bunch of modules and directories.

It runs as a CLI, and now I want another user able to run it on their system.

I exported my conda environment using:

...

ANSWER

Answered 2020-Aug-20 at 22:05

You have to install some Conda, you can use Miniconda to get the bare minimum essentials. The Python interpreter needed is defined in your YAML file and will be installed as required. Miniconda already includes a barebones Python interpreter for its own functionality.

Source https://stackoverflow.com/questions/63513678

QUESTION

Why is my `brew list` gets populated b unknown libraries and how do I get rid of them?

Asked 2020-Feb-12 at 10:13

My mac is 1 month old, i've been installing all I can with brew and brew cask to keep things in order, to be able to uninstall unnecessary software completely. Brew cask list seems ok, only the libraries I have actually isntalled are listed. I've installed maybe ~10 libraries with brew install. Why is my list looks like this now??? How do I get rid of the unnecessary libraries without breaking stuff?

...

ANSWER

Answered 2020-Feb-12 at 10:13

Some formulae require, or depend on others. You can see which other formulae formula X depends on with:

Source https://stackoverflow.com/questions/60185354

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install nettle

You can download it from GitHub.

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