Difference between revisions of "Encrypt and decrypt files"

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== [[OpenSSL]] ==
 
  
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* [[Encrypt]] file (<code>openssl enc</code>):   
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Examples:
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:<code>[[openssl enc]] -[[aes-256]]-[[cbc]] -in un_encrypted.data -out encrypted.data</code>
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* <code>[[openssl enc]], [[openssl enc -d]]</code>
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* <code>[[ansible-vault encrypt]], [[ansible-vault decrypt]]</code>
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* <code>[[sops -d]], [[sops -e]]</code>
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== Using [[OpenSSL]] ==
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'''Encrypt and decrypt a file'''<ref>https://unix.stackexchange.com/questions/162960/how-can-i-encrypt-a-file</ref> ([[GPG]] can also be used for encrypting and decrypting files)<br>
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Using aes-256-cbc cypher, You will be prompted for a password when encrypting that has to be used for decrypting.<ref>https://stackoverflow.com/a/31552829</ref>
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* [[Encrypt]] file (<code>[[openssl enc]]</code>):   
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:<code>[[openssl enc]] -[[aes-256]]-cbc -in un_encrypted.data -out encrypted.data</code>
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: You can use <code>[[file (command)|file]]</code> command to verify file type.
  
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:Use <code>[[file (command)|file]]</code> command to verify file type.
 
 
  [[file]] encrypted.data
 
  [[file]] encrypted.data
 
  encrypted.data: openssl enc'd data with salted password
 
  encrypted.data: openssl enc'd data with salted password
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: Encrypt file providing password on the command line, be aware that your password will be store on [[history]] of your shell):
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::<code>openssl aes-256-cbc -a -salt -in twitterpost.txt -out foo.enc -pass file:<( echo -n "someGoodPassword" )</code>
  
 
* [[Decrypt]] file (<code>openssl enc -d</code>):  
 
* [[Decrypt]] file (<code>openssl enc -d</code>):  
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:<code>openssl enc -d -aes-256-cbc -in encrypted.data -out un_encrypted.data</code>
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:<code>openssl enc '''-d''' -aes-256-cbc -in encrypted.data -out un_encrypted.data</code>
  
  
  
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macOS options:
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* <code>-salt</code> Use a salt in the key derivation routines (the default).  When the salt is being used the first eight bytes of the encrypted data are reserved for the salt: it is randomly generated when encrypting a file and read from the encrypted file when it is decrypted.
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== Related terms ==
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* <code>[[zip]] -r -0 -e encrypted_file.zip /path/to/files</code>
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* <code>[[ansible-vault encrypt]], [[ansible-vault decrypt]]</code>
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* <code>[[aws-encryption-cli]]</code>
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* <code>[[aws kms encrypt]]</code>
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* <code>[[sops --decrypt]]</code>, <code>[[sops -d]]</code>
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* [[PGP]], [[GnuPG]]
  
 
== See also ==
 
== See also ==
 
* {{openSSL}}
 
* {{openSSL}}
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* {{Encryption}}
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[[Category:Security]]

Latest revision as of 07:55, 6 October 2022

Examples:

Using OpenSSL[edit]

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
You can use file command to verify file type.
file encrypted.data
encrypted.data: openssl enc'd data with salted password
Encrypt file providing password on the command line, be aware that your password will be store on history of your shell):
openssl aes-256-cbc -a -salt -in twitterpost.txt -out foo.enc -pass file:<( echo -n "someGoodPassword" )
openssl enc -d -aes-256-cbc -in encrypted.data -out un_encrypted.data


macOS options:

  • -salt Use a salt in the key derivation routines (the default). When the salt is being used the first eight bytes of the encrypted data are reserved for the salt: it is randomly generated when encrypting a file and read from the encrypted file when it is decrypted.

Related terms[edit]

  • zip -r -0 -e encrypted_file.zip /path/to/files

See also[edit]

  • ↑ https://unix.stackexchange.com/questions/162960/how-can-i-encrypt-a-file
  • ↑ https://stackoverflow.com/a/31552829
    • Retrieved from "https://www.wikieduonline.com/index.php?title=Encrypt_and_decrypt_files&oldid=188821"

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