Converting Certificate Formats
Scenarios
ELB supports certificates only in PEM format. If you have a certificate in any other format, you must convert it to a PEM-encoded certificate. There are some common methods for converting a certificate from any other format to PEM.
From DER to PEM
The DER format is usually used on a Java platform.
Run the following command to convert the certificate format:
openssl x509 -inform der -in certificate.cer -out certificate.pem
Run the following command to convert the private key format:
openssl rsa -inform DER -outform PEM -in privatekey.der -out privatekey.pem
From P7B to PEM
The P7B format is usually used by Windows Server and Tomcat.
Run the following command to convert the certificate format:
openssl pkcs7 -print_certs -in incertificate.p7b -out outcertificate.cer
From PFX to PEM
The PFX format is usually used by Windows Server.
Run the following command to convert the certificate format:
openssl pkcs12 -in certname.pfx -nokeys -out cert.pem
Run the following command to convert the private key format:
openssl pkcs12 -in certname.pfx -nocerts -out key.pem -nodes
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