RSA | My Java implementation of RSA encryption | Encryption library

by rhgrant10 Java Version: Current License: No License

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

kandi X-RAY | RSA Summary

RSA is a Java library typically used in Security, Encryption applications. RSA has no bugs, it has no vulnerabilities and it has low support. However RSA build file is not available. You can download it from GitHub.

This program aims to provide the means to encrypt and decrypt files using the RSA algorithm.

Support

Quality

Security

License

Reuse

Support

RSA has a low active ecosystem.

It has 14 star(s) with 16 fork(s). There are 3 watchers for this library.

It had no major release in the last 6 months.

RSA has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of RSA is current.

Quality

RSA has 0 bugs and 0 code smells.

Security

RSA has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

RSA code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

RSA does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

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

RSA has no build file. You will be need to create the build yourself to build the component from source.

Installation instructions are not available. Examples and code snippets are available.

RSA saves you 244 person hours of effort in developing the same functionality from scratch.

It has 593 lines of code, 62 functions and 8 files.

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

Top functions reviewed by kandi - BETA

kandi has reviewed RSA and discovered the below as its top functions. This is intended to give you an instant insight into RSA implemented functionality, and help decide if they suit your requirements.

Encrypt the given source using the given key
Generate a pseudo - random padding string
Encrypt a public key
Get the public exponent
Constructs a new RSA key
Returns the CRT coefficient
Get the first CRT exponent
Returns the second CRT exponent
Returns true if this key is valid
Get the private exponent
Returns true if no values are null
Returns true if the argument is prime
Decrypt the given source and destination
Gets the contents of a file
Returns a portion of a byte array
Converts a BigInteger into a byte array
Generate private keys
Removes all non - positive input arguments
Set the prime factors
Sets the modulus
Converts a byte array into a BigInteger
Decrypt a private key
Set the public exponent
Set the phi

Get all kandi verified functions for this library.

RSA Key Features

No Key Features are available at this moment for RSA.

RSA Examples and Code Snippets

No Code Snippets are available at this moment for RSA.

Community Discussions

Trending Discussions on RSA

Fixing git HTTPS Error: "bad key length" on macOS 12

Unable to negotiate with 40.74.28.9 port 22: no matching host key type found. Their offer: ssh-rsa

Spring Cloud Config Server GitHub SHA-1 error

Chaum blind signature with blinding in JavaScript and verifying in Java

Prometheus cannot scrape from spring-boot application over HTTPS

Colab: (0) UNIMPLEMENTED: DNN library is not found

Encrypt data in Javascript, Decrypt data in C# using private/public keys

Git Bash - ssh connection issue

Paramiko authentication fails with "Agreed upon 'rsa-sha2-512' pubkey algorithm" (and "unsupported public key algorithm: rsa-sha2-512" in sshd log)

Separate gitconfig by directory

QUESTION

Fixing git HTTPS Error: "bad key length" on macOS 12

Asked 2022-Mar-29 at 17:34

I am using a company-hosted (Bitbucket) git repository that is accessible via HTTPS. Accessing it (e.g. git fetch) worked using macOS 11 (Big Sur), but broke after an update to macOS 12 Monterey. *

After the update of macOS to 12 Monterey my previous git setup broke. Now I am getting the following error message:

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ANSWER

Answered 2021-Nov-02 at 07:12

Unfortunately I can't provide you with a fix, but I've found a workaround for that exact same problem (company-hosted bitbucket resulting in exact same error). I also don't know exactly why the problem occurs, but my best guess would be that the libressl library shipped with Monterey has some sort of problem with specific (?TLSv1.3) certs. This guess is because the brew-installed openssl v1.1 and v3 don't throw that error when executed with /opt/homebrew/opt/openssl/bin/openssl s_client -connect ...:443

To get around that error, I've built git from source built against different openssl and curl implementations:

install autoconf, openssl and curl with brew (I think you can select the openssl lib you like, i.e. v1.1 or v3, I chose v3)
clone git version you like, i.e. git clone --branch v2.33.1 https://github.com/git/git.git
cd git
make configure (that is why autoconf is needed)
execute LDFLAGS="-L/opt/homebrew/opt/openssl@3/lib -L/opt/homebrew/opt/curl/lib" CPPFLAGS="-I/opt/homebrew/opt/openssl@3/include -I/opt/homebrew/opt/curl/include" ./configure --prefix=$HOME/git (here LDFLAGS and CPPFLAGS include the libs git will be built against, the right flags are emitted by brew on install success of curl and openssl; --prefix is the install directory of git, defaults to /usr/local but can be changed)
make install
ensure to add the install directory's subfolder /bin to the front of your $PATH to "override" the default git shipped by Monterey
restart terminal
check that git version shows the new version

This should help for now, but as I already said, this is only a workaround, hopefully Apple fixes their libressl fork ASAP.

Source https://stackoverflow.com/questions/69734654

QUESTION

Unable to negotiate with 40.74.28.9 port 22: no matching host key type found. Their offer: ssh-rsa

Asked 2022-Mar-28 at 15:54

After start of using NixOS as a new package management system, I get the following error when using git within Azure DevOps repositories and rsa ssh key:

...

ANSWER

Answered 2021-Nov-12 at 12:44

According to this post, you can add ssh.dev.azure.com host config to your ~/.ssh/config file:

Final ~/.ssh/config that worked for me:

Source https://stackoverflow.com/questions/69875520

QUESTION

Spring Cloud Config Server GitHub SHA-1 error

Asked 2022-Mar-22 at 03:13

Context

This is regarding a Spring Cloud Config Server hobby project (with @EnableConfigServer).

Yesterday, the application could be started.

Today, the application failed to start because of a Git communication error.

From GitHub's official blog post, it is mentioned that SHA-1 is no longer supported starting from 15 March 2022. And that explains the results I'm getting these 2 days.

March 15, 2022

Changes made permanent.

We’ll permanently stop accepting DSA keys. RSA keys uploaded after the cut-off point above will work only with SHA-2 signatures (but again, RSA keys uploaded before this date will continue to work with SHA-1). The deprecated MACs, ciphers, and unencrypted Git protocol will be permanently disabled.

Even if I didn't delete the existing SSH key, it still failed to start today. But anyway, now the only key under the "Deploy keys" section of the repository settings is an SSH key that was added after the March 15, 2022 cut off date.

Dependency versions

Dependency Management:

Dependency Version spring-cloud-dependencies Hoxton.SR12

Dependency:

Dependency Version spring-cloud-config-server (Managed) Spring application configurations

application.yml:

...

ANSWER

Answered 2022-Mar-16 at 14:07

I have a same problem.

See https://github.com/spring-cloud/spring-cloud-config/issues/2061

For right now, I have a dirty workaround: use https uri, username and password(maybe personal secret token).

Source https://stackoverflow.com/questions/71489256

QUESTION

Chaum blind signature with blinding in JavaScript and verifying in Java

Asked 2022-Mar-04 at 16:01

I'm experimenting with Chaum's blind signature, and what I'm trying to do is have the blinding and un-blinding done in JavaScript, and signing and verifying in Java (with bouncy castle). For the Java side, my source is this, and for JavaScript, I found blind-signatures. I've created two small codes to play with, for the Java side:

...

ANSWER

Answered 2021-Dec-13 at 14:56

The blind-signature library used in the NodeJS code for blind signing implements the process described here:

BlindSignature.blind() generates the SHA256 hash of the message and determines the blind message m' = m * r^e mod N.
BlindSignature.sign() calculates the blind signature s' = (m')^d mod N.
BlindSignature.unblind() determines the unblind signature s = s' * r^-1 mod N.
BlindSignature.verify() decrypts the unblind signature (s^e) and compares the result with the hashed message. If both are the same, the verification is successful.

No padding takes place in this process.

In the Java code, the implementation of signing the blind message in signConcealedMessage() is functionally identical to BlindSignature.sign().
In contrast, the verification in the Java code is incompatible with the above process because the Java code uses PSS as padding during verification.
A compatible Java code would be for instance:

Source https://stackoverflow.com/questions/70324926

QUESTION

Prometheus cannot scrape from spring-boot application over HTTPS

Asked 2022-Feb-11 at 19:34

I'm deploying a spring-boot application and prometheus container through docker, and have exposed the spring-boot /actuator/prometheus endpoint successfully. However, when I enable prometheus debug logs, I can see it fails to scrape the metrics:

...

ANSWER

Answered 2022-Feb-07 at 22:37

Ok, I think I found my problem. I made two changes:

First, I moved the contents of the web.config.file into the prometheus.yml file under the 'spring-actuator'. Then I changed the target to use the hostname for my backend container, rather than 127.0.0.1.

The end result was a single prometheus.yml file:

Source https://stackoverflow.com/questions/70950420

QUESTION

Colab: (0) UNIMPLEMENTED: DNN library is not found

Asked 2022-Feb-08 at 19:27

I have pretrained model for object detection (Google Colab + TensorFlow) inside Google Colab and I run it two-three times per week for new images I have and everything was fine for the last year till this week. Now when I try to run model I have this message:

...

ANSWER

Answered 2022-Feb-07 at 09:19

It happened the same to me last friday. I think it has something to do with Cuda instalation in Google Colab but I don't know exactly the reason

Source https://stackoverflow.com/questions/71000120

QUESTION

Encrypt data in Javascript, Decrypt data in C# using private/public keys

Asked 2022-Jan-26 at 13:22

I want to encrypt data in a web browser that is send to my C# backend and decrypted there.

That fails because I am unable to decrypt the data generated on the frontend in the backend.

Here's what I did so far.

First I created a private/public key pair (in XmlString Format). I took the ExportPublicKey function to generate the public key file from here: https://stackoverflow.com/a/28407693/98491

...

ANSWER

Answered 2022-Jan-24 at 15:42

You need to encrypt with the private key and then decrypt with the public key

Source https://stackoverflow.com/questions/70835886

QUESTION

Git Bash - ssh connection issue

Asked 2022-Jan-25 at 07:13

Environment:

...

ANSWER

Answered 2022-Jan-25 at 07:13

Git For Windows 2.33.1 comes with OpenSSH 8.8 which disables RSA signatures using the SHA-1 hash algorithm by default.

For most users, this change should be invisible and there is no need to replace ssh-rsa keys.
OpenSSH has supported RFC8332 RSA/SHA-256/512 signatures since release 7.2 and existing ssh-rsa keys will automatically use the stronger algorithm where possible.

Incompatibility is more likely when connecting to older SSH implementations that have not been upgraded or have not closely tracked improvements in the SSH protocol.

For these cases, it may be necessary to selectively re-enable RSA/SHA1 to allow connection and/or user authentication via the HostkeyAlgorithms and PubkeyAcceptedAlgorithms options.
For example, the following stanza in ~/.ssh/config will enable RSA/SHA1 for host and user authentication for a single destination host:

Source https://stackoverflow.com/questions/69656858

QUESTION

Paramiko authentication fails with "Agreed upon 'rsa-sha2-512' pubkey algorithm" (and "unsupported public key algorithm: rsa-sha2-512" in sshd log)

Asked 2022-Jan-13 at 14:49

I have a Python 3 application running on CentOS Linux 7.7 executing SSH commands against remote hosts. It works properly but today I encountered an odd error executing a command against a "new" remote server (server based on RHEL 6.10):

encountered RSA key, expected OPENSSH key

Executing the same command from the system shell (using the same private key of course) works perfectly fine.

On the remote server I discovered in /var/log/secure that when SSH connection and commands are issued from the source server with Python (using Paramiko) sshd complains about unsupported public key algorithm:

userauth_pubkey: unsupported public key algorithm: rsa-sha2-512

Note that target servers with higher RHEL/CentOS like 7.x don't encounter the issue.

It seems like Paramiko picks/offers the wrong algorithm when negotiating with the remote server when on the contrary SSH shell performs the negotiation properly in the context of this "old" target server. How to get the Python program to work as expected?

Python code

...

ANSWER

Answered 2022-Jan-13 at 14:49

Imo, it's a bug in Paramiko. It does not handle correctly absence of server-sig-algs extension on the server side.

Try disabling rsa-sha2-* on Paramiko side altogether:

Source https://stackoverflow.com/questions/70565357

QUESTION

Separate gitconfig by directory

Asked 2021-Nov-20 at 09:48

I have 2 different github accounts, 1 for work and 1 for personal projects. On my laptop, I created 2 different directories to clone my Github repositories:

Perso: /Users/pierre-alexandre/Documents/perso

Work: /Users/pierre-alexandre/Documents/work

Then, I generated 2 different SSH keys on /Users/pierre-alexandre/.ssh and added each .pub key on their respective Github repository. At the end this is what my /Users/pierre-alexandre/.ssh folder looks like:

...

ANSWER

Answered 2021-Nov-20 at 09:48

Git just runs ssh to connect to a host. Once connected, Git has that ssh run an appropriate Git command on their end, to handle the fetch or push operation. But the entire authentication process—determining who you are and deciding whether you have access—is wholly up to ssh and Git plays no real part in this process.

Your ssh -Tv is therefore the crucial debug output here. We see that your connection to github fails to authenticate as you, after trying these keys:

Source https://stackoverflow.com/questions/70044276

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

Vulnerabilities

No vulnerabilities reported

Install RSA

You can download it from GitHub.
You can use RSA like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the RSA component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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