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linux:ubuntu:openssl_examples

Convert certificates with OpenSSL

DER

Convert a DER file (.crt .cer .der) to PEM
openssl x509 -inform der -in certificate.cer -out certificate.pem

PEM

Convert a PEM file to DER
openssl x509 -outform der -in certificate.pem -out certificate.der
Convert a PEM file to P7B
openssl crl2pkcs7 -nocrl -certfile certificate.cer -out certificate.p7b -certfile CACert.cer
Convert a PEM certificate file and a private key to PKCS#12 (.pfx .p12)
openssl pkcs12 -export -out certificate.pfx -inkey privateKey.key -in certificate.crt -certfile CACert.crt

PFX

Convert a PKCS#12 file (.pfx .p12) containing a private key and certificates to PEM
openssl pkcs12 -in keyStore.pfx -out keyStore.pem -nodes

You can add -nocerts to only output the private key or add -nokeys to only output the certificates.

P7B

Convert a P7B to PEM
openssl pkcs7 -print_certs -in certificate.p7b -out certificate.cer
Convert a P7B to PFX
openssl pkcs7 -print_certs -in certificate.p7b -out certificate.cer
openssl pkcs12 -export -in certificate.cer -inkey privateKey.key -out certificate.pfx -certfile CACert.cer

Other commands

Export public key from private key
openssl rsa -in privkey.pem -pubout > key.pub
Remove password from private key
openssl rsa -in [file1.key] -out [file2.key]

Discussion

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linux/ubuntu/openssl_examples.txt · Last modified: 2019/03/20 14:16 by tplecko