pem | Easy PEM file parsing in Python | TLS library
kandi X-RAY | pem Summary
kandi X-RAY | pem Summary
Easy PEM file parsing in Python.
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Top functions reviewed by kandi - BETA
- Creates an ssl_certificateOptions object from a list of certificates .
- Return the sha1 hex digest of the PEM .
- Parse a PEM - formatted string .
- Create an SSL certificate options from a list of files .
- Find a meta tag .
- Return the PEM as a string .
- Read file contents .
- Parse a PEM - formatted file .
pem Key Features
pem Examples and Code Snippets
Lines of Code : 12License : Permissive (MIT License)
Copypublic static RSAPrivateKey readPKCS8PrivateKey(File file) throws InvalidKeySpecException, IOException, NoSuchAlgorithmException {
KeyFactory factory = KeyFactory.getInstance("RSA");
try (FileReader keyReader = new FileReader(file);
public static RSAPublicKey readX509PublicKeySecondApproach(File file) throws IOException {
try (FileReader keyReader = new FileReader(file)) {
PEMParser pemParser = new PEMParser(keyReader);
JcaPEMKeyConverter convert import rsa
import base64
def generateKeys():
return rsa.newkeys(1024)
def encrypt(message, key):
return rsa.encrypt(message.encode('ascii'), key)
def decrypt(ciphertext, key):
try:
return rsa.decrypt(ciphertext, key)SEPARATOR = b"|" # Notice the `b` prefix (byte string literal)
message1 = ciphertext + SEPARATOR + signature
message2 = message2.split(SEPARATOR)
[cfati@CFATI-5510-0:e:\Work\Dev\StackOverfimport base64
import secrets
import string
import rsa
def create_token():
alphabet = string.ascii_letters + string.digits
token = ''.join(secrets.choice(alphabet) for i in range(32))
return token
def generate_keys():
(import codecs
data = b'\xf0\xf1\xf2' # three hex bytes [F0, F1, F2]
data.decode('latin1') # Result: 'ðñò'
data.decode('cp1254') # Result: 'ğñò'
import binascii
stored_data = binascii.hexlify(data) # b'f0f1f2'
r#!/bin/env python3
# check_ssl_cert.py - python get info for expired SSL cert
# Copyright 2022 Sharuzzaman Ahmat Raslan
# This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General from Crypto.PublicKey import RSA
n = int("b83b...529b", 16);
d = int("4eea...a721", 16);
e = int("010001", 16);
privateKey = RSA.construct((n, e, d))
privateKeyPem = privateKey.exportKey(pkcs=8) # export in PKCS#8 format
publicKey = RSAconst fs = require('fs');
const crypto = require('crypto');
const cert = fs.readFileSync('key.pem', 'utf8');
var privateKey = crypto.createPrivateKey({
'key': cert,
'format': 'pem',
});
const payload = 'foople';
const signerObject = cr-----BEGIN CERTIFICATE REQUEST-----
Community Discussions
Trending Discussions on pem
QUESTION
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:
...ANSWER
Answered 2021-Nov-02 at 07:12Unfortunately 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,opensslandcurlwith 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 gitmake 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=$HOME/git(here LDFLAGS and CPPFLAGS include the libs git will be built against, the right flags are emitted by brew on install success of curl and openssl; --prefix is the install directory of git, defaults to/usr/localbut can be changed) make install- ensure to add the install directory's subfolder
/binto the front of your$PATHto "override" the default git shipped by Monterey - restart terminal
- check that
git versionshows 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.
QUESTION
I am storing a public key in a env variable as a string. This public key is from a .pem file. When I try to use it in my code, I get the following error
...ANSWER
Answered 2022-Mar-28 at 08:47Your key seems to be a PEM encoded public key in X.509/SPKI format. However, the line breaks are missing. These are to be set so that header and footer are each on a single line. In the body there is a line break after every 64 characters.
A correctly formatted PEM key can be processed directly by createPublicKey(). The key will be accepted even if the line breaks in the body are missing, but header and footer must be in different lines, otherwise the posted error message will be displayed: error:0909006C:PEM routines:get_name:no start line.
Example:
QUESTION
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 14:56The 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 * re 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 (se) 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:
QUESTION
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 22:37Ok, 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:
QUESTION
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 15:42You need to encrypt with the private key and then decrypt with the public key
QUESTION
I have a private key that was generated by running:
...ANSWER
Answered 2021-Dec-30 at 11:17Depending on your .NET version, you may not need BouncyCastle at all. As of .NET Core 3.1 there is RSA.ImportEncryptedPkcs8PrivateKey() for DER encoded encrypted private PKCS#8 keys and as of .NET 5.0 there is even RSA.ImportFromEncryptedPem() for PEM encoded encrypted keys.
Otherwise with C#/BouncyCastle the import of an encrypted private PKCS#8 key is available e.g. with:
QUESTION
I try to make an ESDT token issuance transaction using the following Python code
...ANSWER
Answered 2021-Dec-26 at 16:11You use str(0.05 * 10**18) to get the string for the value.
However, this actually outputs the value in scientific notation, which isn't what the blockchain expects.
QUESTION
I'd like to instruct Docker to COPY my certificates from the local /etc/ folder on my Ubuntu machine.
I get the error:
COPY failed: file not found in build context or excluded by .dockerignore: stat etc/.auth_keys/fullchain.pem: file does not exist
I have not excluded in .dockerignore
How can I do it?
Dockerfile:
...ANSWER
Answered 2021-Nov-05 at 11:42The docker context is the directory the Dockerfile is located in. If you want to build an image that is one of the restrictions you have to face.
In this documentation you can see how contexts can be switched, but to keep it simple just consider the same directory to be the context. Note; this also doesn't work with symbolic links.
So your observation was correct and you need to place the files you need to copy in the same directory.
Alternatively, if you don't need to copy them but still have them available at runtime you could opt for a mount. I can imagine this not working in your case because you likely need the files at startup of the container.
QUESTION
I have a Python backend that generates public/private keys, generates a payload, then needs to get that payload signed by the client (ReactJS or pure JS), which is later verified.
The implementation in Python looks like this:
Imports
...ANSWER
Answered 2021-Dec-18 at 11:56CryptoJS only supports symmetric encryption and therefore not ECDSA. WebCrypto supports ECDSA, but not secp256k1.
WebCrypto has the advantage that it is supported by all major browsers. Since you can use other curves according to your comment, I will describe a solution with a curve supported by WebCrypto.
Otherwise, sjcl would also be an alternative, a pure JavaScript library that supports ECDSA and especially secp256k1, s.here.
WebCrypto is a low level API that provides the functionality you need like key generation, key export and signing. Regarding ECDSA WebCrypto supports the curves P-256 (aka secp256r1), P-384 (aka secp384r1) and p-521 (aka secp521r1). In the following I use P-256.
The following JavaScript code generates a key pair for P-256, exports the public key in X.509/SPKI format, DER encoded (so it can be sent to the Python site), and signs a message:
QUESTION
I have been provided with a pem certificate to authenticate with a third party. Authenticating using certificates is a new concept for me.
Inside are two certificates and a private key.
The issuer has advised they do not support SSL verification but use TLS(1.1/1.2).
I have run a script as below:
...ANSWER
Answered 2021-Nov-24 at 09:25The issuer has advised they do not support SSL verification
To me this sounds pretty risky, but if that is indeed the case a simple
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install pem
You can use pem like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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