Difference between revisions of "OpenSSL"

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* {{secrets}}
 
* {{secrets}}
 
* {{RSA}}
 
* {{RSA}}
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* {{SSL}}
  
  

Revision as of 03:35, 27 March 2020

OpenSSL is an open source implementation of the TSL cryptographic protocol, and its now-deprecated predecessor, Secure Sockets Layer (SSL) protocol.

Examples

Generate a new self signed Certificate instead of a CSR

  • openssl req -x509 -nodes -days 3650 -newkey rsa:2048 -keyout private.key -out public.pem

Output a self-signed certificate instead of a certificate request

-nodes (short for no DES) do not encrypt private key
-x509 Output a self-signed certificate instead of a certificate request

Read CSR

  • openssl req -text -noout -in root.csr


Read certificate (CRT)

  • openssl x509 -text -noout -in root.crt

Encrypt and decrypt a file[1] (GPG can also be used for encrypting and decrypting files)
Using aes-256-cbc cypher, You will be prompted for a password when encrypting that has to be used for decrypting.[2]

openssl enc -aes-256-cbc -in un_encrypted.data -out encrypted.data
Use file command to verify file type.
file encrypted.data
encrypted.data: openssl enc'd data with salted password
openssl enc -d -aes-256-cbc -in encrypted.data -out un_encrypted.data

Activities

  • Generate a random number: openssl rand -base64 32[3]
  • openssl s_client -showcerts -connect gnupg.org:443
  • Encrypt a file using aes-256-cbc cypher using openssl enc command

See also

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Source: https://en.wikiversity.org/wiki/OpenSSL