Viewing a certificate using OpenSSL is der and PEM (BASE64) encoded

Please go to official download OpenSSL

https://www.openssl.org/source/

Download to local and unzip and place the certificate you want to view in the OpenSSL directory

Open Command Window

For specific commands, refer to the following:

One-to-verify if "Keytool" did the export my certificate using DER and PEM formats correctly or not was to use "OpenSSL" to View those certificate files. To does this, I used the "OpenSSL x509" command to view Keytool_crt.der and KEYTOOL_CRT.PEM:

>openssl x509-in keytool_crt.pem-inform pem-noout-textcertificate:    Data:        version:3 (0x2)        Serial number:1185636568 (0X46AB60D8)        Signature algorithm:dsawithsha1        issuer:c=ca, St=herong State, L=herong City,.. .        ... >openssl x509-in keytool_crt.der-inform der-noout-textcertificate:    Data:        version:3 (0x2)        Serial number:1185636568 (0X46AB60D8)        Signature algorithm:dsawithsha1        issuer:c=ca, St=herong State, L=herong City, ...        O=herong Company, Ou=heron ...        

Cool. "OpenSSL" can read certificates in DER and PEM formats generated by "Keytool". What I learned so far:

• "Keytool" can generate self-signed X5.09 version 3 certificates.
• "Keytool" can export certificates with DER and PEM formats.
• "OpenSSL" can read certificates generated by "Keytool" in both DER and PEM formats.

Viewing a certificate using OpenSSL is der and PEM (BASE64) encoded