1.3.74 • Published 1 month ago

@sequencemedia/crypto v1.3.74

Weekly downloads
-
License
ISC
Repository
github
Last release
1 month ago

@sequencemedia/crypto

Encrypt and decrypt in Node and Bash

Node

The package main exports two functions, encrypt and decrypt

import {
  encrypt,
  decrypt
} from '@sequencemedia/crypto'

encrypt

function encrypt(
  buffer: Buffer,
  secret: string,
  bytes?: number,
  algorithm?: string
): Buffer

Only buffer and secret are required

  • buffer is the data to encrypt
  • secret is the secret key to use for encryption

Both bytes and algorithm are optional

  • bytes is the number of random bytes to use for the encryption initialisation vector. The default is 16
  • algorithm is the algorithm to use for encryption. The default is aes-256-ctr

decrypt

function decrypt(
  buffer: Buffer,
  secret: string,
  bytes?: number,
  algorithm?: string
): Buffer

Only buffer and secret are required

  • buffer is the data to decrypt
  • secret is the secret key to use for decryption

Both bytes and algorithm are optional

  • bytes is the number of bytes to slice from the buffer for the decryption initialisation vector. The default is 16
  • algorithm is the algorithm to use for decryption. The default is aes-256-ctr

Bash

The package contains three scripts

  1. crypto.sh
  2. encrypt.sh
  3. decrypt.sh

Script crypto.sh exports four functions to consume in your own Bash scripts

source ./crypto.sh
  1. encrypt
  2. decrypt
  3. encrypt_directory
  4. decrypt_directory

Scripts encrypt.sh and decrypt.sh can be executed at the command line

Bash functions

encrypt

Requires CRYPTO_KEY as a variable in the Bash environment and a file path to encrypt

CRYPTO_KEY='secret'
encrypted_file_data=$(encrypt "./file.txt")
CRYPTO_KEY='secret'
encrypt "./file.txt" > "./encrypted.txt"

decrypt

Requires CRYPTO_KEY as a variable in the Bash environment and a file path to decrypt

CRYPTO_KEY='secret'
file_data=$(decrypt "./encrypted.txt")
CRYPTO_KEY='secret'
decrypt "./encrypted.txt" > "./file.txt"

encrypt_directory

Requires CRYPTO_KEY as a variable in the Bash environment and a directory path to encrypt

  • The first argument is the origin directory of files to encrypt
  • The second argument is the destination directory for the encrypted files
CRYPTO_KEY='secret'
encrypt_directory "./directory" "./encrypted"

decrypt_directory

Requires CRYPTO_KEY as a variable in the Bash environment and a directory path to decrypt

  • The first argument is the origin directory of files to decrypt
  • The second argument is the destination directory for the decrypted files
CRYPTO_KEY='secret'
decrypt_directory "./encrypted" "./directory"

Bash scripts

encrypt.sh

Requires CRYPTO_KEY as a variable in the Bash environment

  • You can provide either file or directory paths
  • You can provide --verbose or -v
File paths
  • A file origin path to encrypt
  • A file destination path for the encrypted file
CRYPTO_KEY='secret' ./encrypt.sh \
  --origin "./file.txt" \
  --destination "./encrypted.txt"
Directory paths
  • A directory origin path to encrypt
  • A directory destination path for encrypted files
CRYPTO_KEY='secret' ./encrypt.sh \
  --origin "./directory" \
  --destination "./encrypted"

decrypt.sh

Requires CRYPTO_KEY as a variable in the Bash environment

  • You can provide either file or directory paths
  • You can provide --verbose or -v
File paths
  • A file origin path to decrypt
  • A file destination path for the decrypted file
CRYPTO_KEY='secret' ./decrypt.sh \
  --origin "./encrypted.txt" \
  --destination "./file.txt"
Directory paths
  • A directory origin path to decrypt
  • A directory destination path for decrypted files
CRYPTO_KEY='secret' ./decrypt.sh \
  --origin "./encrypted" \
  --destination "./directory"
cryptonodebashencryptdecryptencodedecodeshell
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