Certificate Key Matcher
Match your CSR, SSL Certificate and Private Key Pairs
You can check whether a certificate matches a private key, or a CSR matches a certificate on your own computer by using the OpenSSL commands below:
openssl pkey -in privateKey.key -pubout -outform pem | sha256sum
openssl x509 -in certificate.crt -pubkey -noout -outform pem | sha256sum
openssl req -in CSR.csr -pubkey -noout -outform pem | sha256sum
Any mismatch, especially between a private key and an SSL certificate is going to mess you up. You'll probably have to re-issue and that's going to waste a lot of time.
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