Difference between revisions of "Verify that a private key matches a certificate"
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To verify the consistency of the RSA private key and to view its modulus: | To verify the consistency of the RSA private key and to view its modulus: | ||
openssl rsa -modulus -noout -in ''my.key'' | openssl md5 | openssl rsa -modulus -noout -in ''my.key'' | openssl md5 | ||
| − | + | ||
openssl rsa -check -noout -in ''my.key'' | openssl rsa -check -noout -in ''my.key'' | ||
RSA Key is ok | RSA Key is ok | ||
Latest revision as of 04:42, 12 February 2024
To verify that an RSA private key matches the RSA public key in a certificate you need to i) verify the consistency of the private key and ii) compare the modulus of the public key in the certificate against the modulus of the private key.
To verify the consistency of the RSA private key and to view its modulus:
openssl rsa -modulus -noout -in my.key | openssl md5 openssl rsa -check -noout -in my.key RSA Key is ok
If it doesn't say 'RSA key ok', it isn't OK!"
To view the modulus of the RSA public key in a certificate:
openssl x509 -modulus -noout -in my.crt | openssl md5
If the first commands shows any errors, or if the modulus of the public key in the certificate and the modulus of the private key do not exactly match, then you're not using the correct private key. You can either create a brand new key and CSR and contact support, or you can do a search for any other private keys on the system and see if they match.
