Symmetic encryption
- Openssl Base64 Example
- Openssl Enc Base64
- Aes 256 Encryption Software
- Base64 Encryption Key
- Openssl Convert Crt To Base64
For symmetic encryption, you can use the following:
To encrypt:
To decrypt:
Asymmetric encryption
For Asymmetric encryption you must first generate your private key and extract the public key.
First, you will need to generate a pseudo-random string of bytes that you will use as a 256 bit encryption key. The requested length will be 32 (since 32 bytes = 256 bits). If you echo out the key, you will notice that your browser chokes. In order to avoid possible corruption when storing the key in a file or database, we will base64encode it. Apr 27, 2016 Encrypt data using AES and 256-bit keys AES stands for Advanced Encryption Standard and is an industry-standard algorithm for encrypting data symmetrically which even the US government has approved for SECRET documents.
To encrypt:
To decrypt:
Encripting files
You can't directly encrypt a large file using
rsautl
. Instead, do the following:- Generate a key using
openssl rand
, e.g.openssl rand 32 -out keyfile
. - Encrypt the key file using
openssl rsautl
. - Encrypt the data using
openssl enc
, using the generated key from step 1. - Package the encrypted key file with the encrypted data. The recipient will need to decrypt the key with their private key, then decrypt the data with the resulting key.
Ultimate solution for safe and high secured encode anyone file in OpenSSL and command-line:
Private key generation (encrypted private key):
With unecrypted private key:
With encrypted private key:
With existing encrypted (unecrypted) private key:
Encrypt a file
Encrypt binary file:
Encrypt text file:
What is what:
smime
— ssl command for S/MIME utility (smime(1)).-encrypt
— chosen method for file process.-binary
— use safe file process. Normally the input message is converted to 'canonical' format as required by the S/MIME specification, this switch disable it. It is necessary for all binary files (like a images, sounds, ZIP archives).-aes-256-cbc
— chosen cipher AES in 256 bit for encryption (strong). If not specified 40 bit RC2 is used (very weak). (Supported ciphers).-in plainfile.zip
— input file name.-out encrypted.zip.enc
— output file name.-outform DER
— encode output file as binary. If is not specified, file is encoded by base64 and file size will be increased by 30%.yourSslCertificate.pem
— file name of your certificate's. That should be in PEM format.
That command can very effectively a strongly encrypt any file regardless of its size or format.
Decrypt a file
Decrypt binary file:
For text files:
What is what:
-inform DER
— same as-outform
above.-inkey private.key
— file name of your private key. That should be in PEM format and can be encrypted by password.-passin pass:your_password
— (optional) your password for private key encrypt.
Verification
Creating a signed digest of a file:
Verify a signed digest:
Source
Openssl Base64 Example
gistfile1.txt
Openssl Enc Base64
echo -n 'That's the text'|openssl enc -e -aes-256-cbc -a |
Encrypt with interactive password. Encrypted message is base64-encoded afterwards. |
echo -n 'That's the text'|openssl enc -e -aes-256-cbc -a -k 'MySuperPassword' |
Encrypt with specified password. Encrypted message is base64-encoded afterwards. |
echo 'GVkYiq1b4M/8ZansBC3Jwx/UtGZzlxJPpygyC'|openssl base64 -d|openssl enc -d -aes-256-cbc |
Base-64 decode and decrypt message with interactive password. |
echo 'GVkYiq1b4M/8ZansBC3Jwx/UtGZzlxJPpygyC'|openssl base64 -d|openssl enc -d -aes-256-cbc -k 'MySuperPassword' |
Base-64 decode and decrypt message with specified password. |
Aes 256 Encryption Software
commented Mar 13, 2020 • edited
edited
Base64 Encryption Key
Your decoding examples don't include -a so wouldn't Base64 decode the input string, right? Also worth noting that you should now include the password key function and iteration count as well, e.g. openssl enc -e -aes-256-cbc -pbkdf2 -iter 1234 -a -k <password> |
Openssl Convert Crt To Base64
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