Apr 12, 2020 root@centos8-1 certs# openssl genrsa -des3 -passout file:mypass.enc -out ca.key 4096 Generating RSA private key, 4096 bit long modulus (2 primes). Now we will use the private key with openssl to create certificate authority certificate ca.cert.pem. OpenSSL uses the information you specify to compile a X.509 certificate using the.
You may generate an RSA private key with the help of this tool. Additionally, it will display the public key of a generated or pasted private key.
Description
RSA is an asymmetric encryption algorithm. With a given key pair, data that is encrypted with one key can only be decrypted by the other. This is useful for encrypting data between a large number of parties; only one key pair per person need exist. RSA is widely used across the internet with HTTPS.
To generate a key pair, select the bit length of your key pair and click Generate key pair. Depending on length, your browser may take a long time to generate the key pair. A 1024-bit key will usually be ready instantly, while a 4096-bit key may take up to several minutes. For a faster and more secure method, see Do It Yourself below.
CryptoTools.net does not yet have a tool for facilitating the encryption and decryption of data using RSA, but you may Do It Yourself with the instructions below.
Do It Yourself
For these steps, you will need a command line shell with OpenSSL. Ideally, you should have a private key of your own and a public key from someone else. For demonstration, we will only use a single key pair.
Generate Private Key
Run this command to generate a 4096-bit private key and output it to the private.pem file. If you like, you may change the key length and/or output file.
Derive Public Key
Given a private key, you may derive its public key and output it to public.pem using this command. (You may also paste your OpenSSL-generated private key into the form above to get its public key.)
Encrypt Data
We can now use this key pair to encrypt and decrypt a file, data.txt.
Decrypt Data
Given the encrypted file from the previous step, you may decrypt it like so.
OpenSSL Generate 4096-bit Certificate (Public/Private Key Encryption) with SHA256 Fingerprint
gencert.sh
# Generate Private Key and Certificate using RSA 256 encryption (4096-bit key) |
openssl req -x509 -newkey rsa:4096 -keyout privatekey.pem -out certificate.pem -days 365 |
# Alternatively, setting the '-newkey' parameter to 'rsa:2048' will generate a 2048-bit key. |
# Generate PKCS#12 (P12) file for cert; combines both key and certificate together |
openssl pkcs12 -export -inkey privatekey.pem -in certificate.pem -out cert.pfx |
# Generate SHA256 Fingerprint for Certificate and export to a file |
openssl x509 -noout -fingerprint -sha256 -inform pem -in certificate.pem >> fingerprint.txt |
# Generate SHA1 Fingerprint for Certificate and export to a file |
#openssl x509 -noout -fingerprint -sha1 -inform pem -in certificate.pem >> fingerprint.txt |
# FYI, it's best practice to use SHA256 instead of SHA1 for better security, but this shows how to do it if you REALLY need to. |
commented Nov 7, 2019
Generate Rsa 4096 Key Openssl Pdf
Here's a couple useful links related to this: |
Generate Rsa 4096 Key Openssl Free
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