Online RSA key generation. A blog about software development and programming. This is fine if you want to generate a key pair once, but what if you want. The resulting PEM strings be saved and then later fed to OpenSSL::PKey::RSA.
- Openssl Generate Public Private Key Pair And Csr
- Openssl Generate Rsa Key Pair Chart
- Openssl Generate Rsa Key Pair And Certificate
- Openssl Generate Rsa Key Pair C Example
Last updated: 14/06/2018
How to use OpenSSL?
OpenSSL is the true Swiss Army knife of certificate management, and just like with the real McCoy, you spend more time extracting the nail file when what you really want is the inflatable hacksaw. You'll find an overview of the most commonly used commands below.
Certificate requests and key generation
Typically, when you ordered a new SSL certificate you must generate a CSR or certificate signing request, with a new private key:
Alternatively, use the Kinamo CSR Generator for easy CSR creation.
Openssl Generate Public Private Key Pair And Csr
Generate a new certificate request using an existing private key:
Generate a certificate request starting from an existing certificate:
Generate a new RSA private key:
Encrypt a private key with a passphrase:
Remove a passphrase from an encrypted private key:
Generate a new ECC private key:
Create a self-signed certificate
Generate a self-signed certificate for testing purposes with one year validity period, together with a new 2048-bit key:
View and verify certificates
Check and display a certificate request (CSR):
Verify and display a key pair:
View a PEM-encoded certificate:
View a certificate encoded in PKCS#7 format:
View a certificate and key pair encoded in PKCS#12 format:
Verify an SSL connection and display all certificates in the chain:
The Kinamo SSL Tester will give you the same results, in a human-readable format.
Openssl Generate Rsa Key Pair Chart
Control whether a certificate, a certificate request and a private key have the same public key:
Check a certificate and its intermediate certificate chain for web server purposes:
Certificate conversion
Conversion of PKCS#12 ( .pfx .p12, typically used on Microsoft Windows) files with private key and certificate to PEM (typically used on Linux):
Conversion of PEM to PKCS#12:
Conversion of PKCS#7 format ( .p7b .p7c ) to PEM:
Conversion of PEM format to PKCS#7:
Openssl Generate Rsa Key Pair And Certificate
Conversion of DER (.crt .cer or .der) to PEM:
Openssl Generate Rsa Key Pair C Example
Conversion from PEM to DER format:
Checking SSL Connections
This will output the website's certificate, including any intermediate certificates