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devnoh-spring-boot-rsa-sign

Java Keytool

Create Keystore with Keytool

$ keytool -genkey -alias server -keyalg RSA -keystore server.jks -keysize 2048 -validity 3650 \
    -dname "CN=Server, OU=Backend, O=AutoGrivity, L=Irvine, S=California, C=US" \
    -storepass password -keypass password

$ keytool -genkey -alias partner -keyalg RSA -keystore partner.jks -keysize 2048 -validity 3650 \
    -dname "CN=Partner, OU=Partner Unit, O=Partner Inc, L=Irvine, S=California, C=US" \
    -storepass password -keypass password

Export Certificate from Keystore

$ keytool -export -alias server -keystore server.jks -file server.cer
$ keytool -export -rfc -alias server -keystore server.jks -file server.crt

$ keytool -export -alias partner -keystore partner.jks -file partner.cer
$ keytool -export -rfc -alias partner -keystore partner.jks -file partner.crt

Export Private Key from Keystore

Export from keytool's proprietary format (called "JKS") to standardized format PKCS #12:

$ keytool -importkeystore -srckeystore server.jks -destkeystore server.p12 \
    -deststoretype PKCS12 -srcalias server -deststorepass password -destkeypass password

$ keytool -importkeystore -srckeystore partner.jks -destkeystore partner.p12 \
    -deststoretype PKCS12 -srcalias partner -deststorepass password -destkeypass password

Export certificate using openssl:

$ openssl pkcs12 -in server.p12 -nokeys -out server.crt

$ openssl pkcs12 -in partner.p12 -nokeys -out partner.crt

Export unencrypted private key:

$ openssl pkcs12 -in server.p12 -nodes -nocerts -out server_private.key

$ openssl pkcs12 -in partner.p12 -nodes -nocerts -out partner_private.key

Export Public Key from Certificate

$ openssl x509 -in partner.crt -pubkey -noout > partner_public.key

$ openssl x509 -in server.crt -pubkey -noout > server_public.key

OpenSSL

Create Certificates with OpenSSL

$ openssl req -x509 -newkey rsa:2048 -keyout server.key -out server.crt -days 3650 -nodes

View Certificates

$ openssl x509 -in server.crt -text -noout
$ openssl x509 -in server.cer -inform der -text -noout

Convert PEM to DER

$ openssl x509 -outform der -in server.crt -out server.cer
$ openssl rsa -outform der -in server.pem -out server.der

Convert DER to PEM

$ openssl x509 -inform der -in server.cer -out server.crt
$ openssl rsa -outform der -in server.der -out server.pem

To remove the Bag Attributes

$ openssl x509 -in server.crt -out server.crt
$ openssl rsa -in server.key -out server.key