以下のようなエラーが出て小一時間溶かしました。
OpenSSL> rsa -noout -modules -in private.key rsa: Unrecognized flag modules rsa: Use -help for summary. error in rsa
OpenSSL> req -noout -modules -in server.csr req: Unrecognized flag modules req: Use -help for summary.
OpenSSL> x509 -noout -modules -in server.crt x509: Unrecognized flag modules x509: Use -help for summary. error in x509
もしかして:modulus
OpenSSL> rsa -noout -modulus -in private.key Modulus=D33DDA42F3XXXX...XXXXD431587DC9
OpenSSL> req -noout -modulus -in server.csr Modulus=D33DDA42F3XXXX...XXXXD431587DC9
OpenSSL> x509 -noout -modulus -in server.crt Modulus=D33DDA42F3XXXX...XXXXD431587DC9