- 
    Check a Certificate Signing Request (CSR) 
 openssl req -text -noout -verify -in CSR.csr
- 
    Check a private key 
 openssl rsa -in privateKey.key -check
- 
    Check a certificate 
 openssl x509 -in certificate.crt -text -noout
- 
    Check a PKCS#12 file (.pfx or .p12) 
 openssl pkcs12 -info -in keyStore.p12
  
  
  
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