pem | Easy PEM file parsing in Python | TLS library

 by   hynek Python Version: 23.1.0 License: MIT

kandi X-RAY | pem Summary

kandi X-RAY | pem Summary

pem is a Python library typically used in Security, TLS applications. pem has no bugs, it has no vulnerabilities, it has a Permissive License and it has high support. However pem build file is not available. You can install using 'pip install pem' or download it from GitHub, PyPI.

Easy PEM file parsing in Python.

            kandi-support Support

              pem has a highly active ecosystem.
              It has 139 star(s) with 37 fork(s). There are 9 watchers for this library.
              There were 1 major release(s) in the last 12 months.
              There are 6 open issues and 17 have been closed. On average issues are closed in 123 days. There are no pull requests.
              It has a negative sentiment in the developer community.
              The latest version of pem is 23.1.0

            kandi-Quality Quality

              pem has 0 bugs and 0 code smells.

            kandi-Security Security

              pem has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              pem code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              pem is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              pem releases are not available. You will need to build from source code and install.
              Deployable package is available in PyPI.
              pem has no build file. You will be need to create the build yourself to build the component from source.
              It has 1035 lines of code, 85 functions and 10 files.
              It has low code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed pem and discovered the below as its top functions. This is intended to give you an instant insight into pem implemented functionality, and help decide if they suit your requirements.
            • 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 .
            Get all kandi verified functions for this library.

            pem Key Features

            No Key Features are available at this moment for pem.

            pem Examples and Code Snippets

            Read an RSA private key from a PEM file .
            javadot img1Lines of Code : 12dot img1License : Permissive (MIT License)
            copy iconCopy
            public static RSAPrivateKey readPKCS8PrivateKey(File file) throws InvalidKeySpecException, IOException, NoSuchAlgorithmException {
                    KeyFactory factory = KeyFactory.getInstance("RSA");
                    try (FileReader keyReader = new FileReader(file);
            Read a PEM encoded public key from a file .
            javadot img2Lines of Code : 10dot img2License : Permissive (MIT License)
            copy iconCopy
            public static RSAPublicKey readX509PublicKeySecondApproach(File file) throws IOException {
                    try (FileReader keyReader = new FileReader(file)) {
                        PEMParser pemParser = new PEMParser(keyReader);
                        JcaPEMKeyConverter convert  
            Separate files for rsa encryption and decryption
            Pythondot img3Lines of Code : 44dot img3License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            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):
                    return rsa.decrypt(ciphertext, key)
            RSA Encrypted data convert from bytes to string and back to bytes?
            Pythondot img4Lines of Code : 17dot img4License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            SEPARATOR = b"|"  # Notice the `b` prefix (byte string literal)
            message1 = ciphertext + SEPARATOR + signature
            message2 = message2.split(SEPARATOR)
            Convert bytes to string or store as bytes python
            Pythondot img5Lines of Code : 73dot img5License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            import 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():
            Convert bytes to string or store as bytes python
            Pythondot img6Lines of Code : 13dot img6License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            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'
            Python: how to get expired SSL cert date?
            Pythondot img7Lines of Code : 45dot img7License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            #!/bin/env python3
            # - 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 
            How to add a custom RSA key pair to a .pem file
            Pythondot img8Lines of Code : 47dot img8License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            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 = RSA
            Nodejs crypto to Python jwt convert
            Pythondot img9Lines of Code : 44dot img9License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            const 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
            no start line:crypto/pem/pem_lib.c:745:Expecting: CERTIFICATE REQUEST
            Pythondot img10Lines of Code : 2dot img10License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            -----BEGIN CERTIFICATE REQUEST-----

            Community Discussions


            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:



            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:

            1. 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)
            2. clone git version you like, i.e. git clone --branch v2.33.1
            3. cd git
            4. make configure (that is why autoconf is needed)
            5. 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)
            6. make install
            7. ensure to add the install directory's subfolder /bin to the front of your $PATH to "override" the default git shipped by Monterey
            8. restart terminal
            9. 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.



            Access a .pem public key from .env file
            Asked 2022-Mar-28 at 09:14

            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



            Answered 2022-Mar-28 at 08:47

            Your 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.




            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:



            Answered 2021-Dec-13 at 14:56

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

            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:



            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:



            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

            The end result was a single prometheus.yml file:



            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:



            Answered 2022-Jan-24 at 15:42

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



            C# - How to Decrypt an Encrypted Private Key with Bouncy Castle
            Asked 2021-Dec-30 at 11:17

            I have a private key that was generated by running:



            Answered 2021-Dec-30 at 11:17

            Depending 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:



            Erdpy: Token issuance transaction fails with code: internal_issue
            Asked 2021-Dec-26 at 16:11

            I try to make an ESDT token issuance transaction using the following Python code



            Answered 2021-Dec-26 at 16:11

            You 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.



            Docker: COPY failed: file not found in build context (Dockerfile)
            Asked 2021-Dec-21 at 14:57

            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?




            Answered 2021-Nov-05 at 11:42

            The 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.



            Signing payload in JS (Frontend) using EC and validating in Python
            Asked 2021-Dec-18 at 11:56

            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:




            Answered 2021-Dec-18 at 11:56

            CryptoJS 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,

            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:



            PEM Certificate & TLS Verification against REST api
            Asked 2021-Nov-30 at 03:58

            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:



            Answered 2021-Nov-24 at 09:25

            The 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


            No vulnerabilities reported

            Install pem

            You can install using 'pip install pem' or download it from GitHub, PyPI.
            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.


            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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            pip install pem

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            gh repo clone hynek/pem

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