Awesome-Mirrors/cyber-security-resources
1
0
Fork 0
mirror of https://github.com/The-Art-of-Hacking/h4cker.git synced 2024-12-23 14:29:31 -05:00
Code Issues Packages Projects Releases Wiki Activity

openssl example

Browse Source 
Creating an example of a certificate request and generation in openssl
This commit is contained in:
Omar Santos 2023-03-14 13:34:58 -04:00 committed by GitHub
parent 561b1c073b
commit 17784c8add
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 37 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
crypto/cert_openssl.md Normal file
View File

@ -0,0 +1,37 @@
# Generating a Certificate Using OpenSSL
OpenSSL is an open-source software library that provides cryptographic functions and tools to developers and system administrators. It is widely used in many applications and operating systems to implement secure communication and data protection.
OpenSSL includes a variety of cryptographic functions, such as encryption and decryption, digital signatures, hash functions, and key management. It also supports various cryptographic protocols, including SSL/TLS, DTLS, and SSH.
OpenSSL provides a command-line interface (CLI) tool that allows users to perform cryptographic operations, such as generating keys and certificates, encrypting and decrypting data, and testing network connectivity using SSL/TLS. It also provides a programming interface that can be used by developers to integrate cryptographic functionality into their applications.
OpenSSL is used in many applications and systems, including web servers, email servers, VPNs, and mobile devices. It is also used by many popular software libraries and frameworks, such as the Python cryptography library and the OpenSSL wrapper for Ruby.
OpenSSL is licensed under the Apache License 2.0, which allows for free use and distribution of the software.
## Generating the Private Key and the Certificate Request
You can generate a certificate using OpenSSL by following these steps:
- Open a command prompt or terminal window on your computer.
- Enter the following command to generate a private key:
```
openssl genpkey -algorithm RSA -out private.key -aes256
```
- This command will generate a private key file named "private.key" using the RSA algorithm with 256-bit AES encryption. You will be prompted to enter a password to secure the private key.
- Enter the following command to generate a Certificate Signing Request (CSR) using the private key:
```
openssl req -new -key private.key -out request.csr
```
- This command will generate a CSR file named "request.csr" using the private key you just generated. You will be prompted to enter some information, such as your name and organization, which will be included in the CSR.
- Submit the CSR to a trusted Certificate Authority (CA) to obtain a signed certificate.
- Alternatively, you can self-sign the certificate using the following command:
```
openssl req -new -x509 -key private.key -out certificate.crt -days 365
```
- This command will generate a self-signed certificate named "certificate.crt" using the private key you just generated. The certificate will be valid for 365 days. Note that self-signed certificates are not trusted by default and may cause security warnings in web browsers and other applications.