You have no need to use product key or activation key after short time. Windows xp home sp1 working product key generator. Product keys that you put in its activation bar will remain working-able for lifetime. It helps to update old product key into new one.
Run 'openssl genrsa' to generate a RSA key pair. Run 'openssl req -new -x509' to generate a self-signed certificate and stored it in PEM format. Run 'openssl x509' to convert the certificate from PEM encoding to DER format. The test session was recorded below. OpenSSL and RSA keys¶ Another way to look into a private key with OpenSSL is to use the rsa module. While the asn1parse module is a generic ASN.1 parser, the rsa module knows the structure of an RSA key and can properly output the field names.
Common OpenSSL Commands with Keys and Certificates
Generate RSA private key with certificate in a single command
Generate Certificate Signing Request (CSR) from private key with passphrase
Generate RSA private key (2048 bit)
Openssl Generate Private Key
Generate a Certificate Signing Request (CSR)
Generate RSA private key (2048 bit) and a Certificate Signing Request (CSR) with a single command
Convert private key to PEM format
Generate a self-signed certificate that is valid for a year with sha256 hash