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openssl.md

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openssl

  • Read the contents of a certifiacte file

    openssl x509 -in something.com.cert.pem -text

  • Create public private pair

    openssl genrsa -out private-key.pem 2048
openssl rsa -in key.pem -outform PEM -pubout -out public.pem

  • Create a self-signed certificate

    openssl req -new \
  -newkey rsa:4096 \
  -days 365 \
  -nodes -x509 \
  -subj /C=IL/CN=localhost \
  -keyout private-key.pem \
  -out self-signed.cert

  • Create symetric key

    openssl rand -base64 32 > key.bin

  • Encrypt using symetric key

    openssl enc \
  -aes-256-cbc \
  -salt \
  -in file_to_encrypt.txt \
  -out ecrypted_file.enc \
  -kfile ./key.bin

  • Encrypt using public key

    openssl rsautl -encrypt \
  -inkey aharon.pub.pem \
  -pubin -in key.bin \
  -out key.bin.aharon.enc

  • Decrypt using private key

    openssl rsautl -decrypt \
  -inkey priate-key.pem \
  -in filekey_encrypted.key \
  -out filekey.key

  • Decrypt using symetric key

    openssl enc -d \
  -aes-256-cbc \
  -in kubeconfig_encrypted \
  -out kubeconfig \
  -kfile ./symetric-key.bin