Additional cheat files (#139)

* Most common openssl commands

* Most common java keytool commands
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spoki0 2019-10-28 20:56:36 +01:00 committed by Denis Isidoro
parent a0c5a6293b
commit 547954d5f0
2 changed files with 139 additions and 0 deletions

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% java keytool, certificate, encryption
## Creating
# Generate a Java keystore and key pair
keytool -genkey -alias <ALIAS> -keyalg RSA -keystore <OUTPUT_JKS> -keysize <RSA_LENGTH>
# Generate a certificate signing request (CSR) for an existing Java keystore
keytool -certreq -alias <ALIAS> -keystore <INPUT_JKS> -file <OUTPUT_CSR>
# Import a root or intermediate CA certificate to an existing Java keystore
keytool -import -trustcacerts -alias root -file <INPUT_CRT> -keystore <INPUT_JKS>
# Import a signed primary certificate to an existing Java keystore
keytool -import -trustcacerts -alias <ALIAS> -file <INPUT_CRT> -keystore <INPUT_JKS>
# Generate a keystore and self-signed certificate
keytool -genkey -keyalg RSA -alias <ALIAS> -keystore <OUTPUT_JKS> -storepass <PASSWORD> -validity <VALIDITY> -keysize <RSA_LENGTH>
## Verifying
# Check a stand-alone certificate
keytool -printcert -v -file <INPUT_CRT>
# Check which certificates are in a Java keystore
keytool -list -v -keystore <INPUT_JKS>
# Check a particular keystore entry using an alias
keytool -list -v -keystore <INPUT_JKS> -alias <ALIAS>
## Other
# Remove a certificate from a keystore
keytool -delete -alias <ALIAS> -keystore <INPUT_JKS>
# Change the password of a keystore
keytool -storepasswd -keystore <INPUT_JKS> -new <NEW_PASSWORD>
# Export a certificate from a keystore
keytool -export -alias <ALIAS> -file <OUTPUT_CRT> -keystore <INPUT_JKS>
# List the trusted CA Certs from the default Java Trusted Certs Keystore
keytool -list -v -keystore $JAVA_HOME/jre/lib/security/cacerts
# Import New Certificate Authority into the default Java Trusted Certs Keystore
keytool -import -trustcacerts -file <INPUT_PEM> -alias <ALIAS> -keystore $JAVA_HOME/jre/lib/security/cacerts
# Sensible/common default alternatives
$ VALIDITY: printf "DAYS\tCOMMENT\n1\ta day\n30\ta month\n365\ta year\n730\ttwo years" --- --column 1 --headers 1
$ RSA_LENGTH: printf "KEY LENGTH\tCOMMENT\n2048\t\tDefault\n4096\t\tBetter\n8192\t\tSlow?" --- --column 1 --headers 1
# Attempt to find files with the appropriate endings, default to everything.
$ INPUT_CRT: ls -a | grep -e "\(.crt\|.cer\|.der\)" || ls -a
$ INPUT_PEM: ls -a | grep -e "\(.pem\)" || ls -a
$ INPUT_JKS: ls -a | grep -e "\(.jks\)" || ls -a

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% openssl, certificate, encryption
## General OpenSSL Commands
# Create a new signing request and key
openssl req -new -newkey rsa:<RSA_LENGTH> -nodes -out <OUTPUT_CSR> -keyout <OUTPUT_KEY>
# Create a new self-signed certificate
openssl req -x509 -sha256 -nodes -days <VALIDITY> -newkey rsa:<RSA_LENGTH> -out <OUTPUT_CRT> -keyout <OUTPUT_KEY>
# Create a signing request from existing key
openssl req -out <OUTPUT_CSR> -key <INPUT_KEY> -new
# Create a signing request from existing certificate and key
openssl x509 -x509toreq -out <OUTPUT_CSR> -in <INPUT_CRT> -signkey <INPUT_KEY>
# Remove a passphrase from a private key
openssl rsa -in <INPUT_KEY> -out <OUTPUT_PLAINTEXT_KEY>
## Converting between the different encoding
# Convert a DER encoded file to a PEM encoded file
openssl x509 -inform der -in <INPUT_CRT> -out <OUTPUT_PEM>
# Convert a PEM encoded file to a DER encoded file
openssl x509 -outform der -in <INPUT_PEM> -out <OUTPUT_CRT>
# Convert a PKCS12 encoded file containing a private key and certificates to PEM
openssl pkcs12 -in <INPUT_PKCS12> -out <OUTPUT_PEM> -nodes
# Extract the private key from a PKCS12 encoded file
openssl pkcs12 -in <INPUT_PKCS12> -out <OUTPUT_PEM> -nodes -nocerts
# Extract the certificate from a PKCS12 encoded file
openssl pkcs12 -in <INPUT_PKCS12> -out <OUTPUT_PEM> -nodes -nokeys
# Convert a PEM certificate file and a private key to PKCS12 encoded file
openssl pkcs12 -export -out <OUTPUT_PKCS12> -inkey <INPUT_KEY> -in <INPUT_CRT> -certfile <INPUT_CRT>
## Validating certificates and keys using OpenSSL
# Validate a certificate signing request
openssl req -text -noout -verify -in <OUTPUT_CSR>
# Validate a private key
openssl rsa -in <INPUT_KEY> -check
# Validate a certificate
openssl x509 -in <INPUT_CRT> -text -noout
# Validate a PKCS12 file (.pfx or .p12)
openssl pkcs12 -info -in <INPUT_PKCS12>
## Debugging using OpenSSL
# Compare the MD5 hash of a certificate
openssl x509 -noout -modulus -in <INPUT_CRT> | openssl md5
# Compare the MD5 hash of a private key
openssl rsa -noout -modulus -in <INPUT_KEY> | openssl md5
# Compare the MD5 hash of a certificate signing request
openssl req -noout -modulus -in <INPUT_CSR> | openssl md5
# Display the server certificate chain
openssl s_client -connect <URL>:<PORT>
# Sensible/common default alternatives
$ VALIDITY: printf "DAYS\tCOMMENT\n1\ta day\n30\ta month\n365\ta year\n730\ttwo years" --- --column 1 --headers 1
$ RSA_LENGTH: printf "KEY LENGTH\tCOMMENT\n2048\t\tDefault\n4096\t\tBetter\n8192\t\tSlow?" --- --column 1 --headers 1
# Attempt to find files with the appropriate endings, default to everything.
$ INPUT_PKCS12: ls -a | grep -e "\(.pfx\|.p12\)" || ls -a
$ INPUT_CSR: ls -a | grep -e "\(.csr\)" || ls -a
$ INPUT_KEY: ls -a | grep -e "\(.key\|.pem\)" || ls -a
$ INPUT_CRT: ls -a | grep -e "\(.crt\|.cer\|.der\)" || ls -a
$ INPUT_PEM: ls -a | grep -e "\(.pem\)" || ls -a