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+--- الموضوع: Encrypting a file line by line (/showthread.php?tid=10)
Encrypting a file line by line - ftth - 11-04-2025
Encrypting a file line by line
You can use a Bash loop to process the file line by line. This example uses
How to run the script:
bash
كود:
./Encryptinglinebyline.sh /path/to/input_file.txtbash
كود:
#!/bin/bash
#INPUT_FILE="/path/to/file.txt"
# Example: Read the file line by line ./your_script.sh /path/to/input_file.txt
INPUT_FILE="$1"
# Check if file was provided and exists
if [ -z "$INPUT_FILE" ]; then
echo "Usage: $0 <input_file>"
exit 1
fi
if [ ! -f "$INPUT_FILE" ]; then
echo "Error: File not found at $INPUT_FILE"
exit 1
fi
OUTPUT_FILE="encrypted.txt"
PASSPHRASE="your_secret_password" # Replace with your actual password
> "$OUTPUT_FILE" # Clear the output file
while IFS= read -r line
do
# Skip empty lines if necessary
if [ -z "$line" ]; then
continue
fi
# Encrypt the line and append to the output file
echo "$line" | openssl enc -aes-256-cbc -a -salt -pbkdf2 -pass pass:"$PASSPHRASE" >> "$OUTPUT_FILE"
done < "$INPUT_FILE"
echo "Encryption complete. Encrypted data saved to $OUTPUT_FILE"Decrypting the file line by line
The decryption process also involves reading each line of the encrypted file and decrypting it individually.
bash
كود:
#!/bin/bash
#INPUT_FILE="/path/to/file_encrypted.txt"
# Example: Read the file line by line ./your_script.sh /path/to/input_file.txt
INPUT_FILE="$1"
# Check if file was provided and exists
if [ -z "$INPUT_FILE" ]; then
echo "Usage: $0 <input_file>"
exit 1
fi
if [ ! -f "$INPUT_FILE" ]; then
echo "Error: File not found at $INPUT_FILE"
exit 1
fi
OUTPUT_FILE="decrypted.txt"
PASSPHRASE="your_secret_password" # Use the same password used for encryption
> "$OUTPUT_FILE" # Clear the output file
while IFS= read -r line
do
# Decrypt the line and append to the output file
echo "$line" | openssl enc -d -aes-256-cbc -a -salt -pbkdf2 -pass pass:"$PASSPHRASE" >> "$OUTPUT_FILE"
done < "$INPUT_FILE"
echo "Decryption complete. Decrypted data saved to $OUTPUT_FILE"Alternative: Encrypting the entire file at once
For most standard use cases, it is much simpler and more efficient to encrypt the entire file using a single OpenSSL command:
[b]Encryption:[/b]
bash
كود:
openssl enc -aes-256-cbc -salt -pbkdf2 -a -e -in plaintext.txt -out encrypted.txt[b]Decryption:[/b]
bash
كود:
openssl enc -d -aes-256-cbc -salt -pbkdf2 -a -in encrypted.txt -out decrypted.txt