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crypt-dir-1.1.9
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-
| ویژگی | مقدار |
|---|---|
| سیستم عامل | - |
| نام فایل | crypt-dir-1.1.9 |
| نام | crypt-dir |
| نسخه کتابخانه | 1.1.9 |
| نگهدارنده | [] |
| ایمیل نگهدارنده | [] |
| نویسنده | Nguyen Ngoc Khanh |
| ایمیل نویسنده | khanh.nguyen.contact@gmail.com |
| آدرس صفحه اصلی | https://github.com/khanh101/crypt-dir |
| آدرس اینترنتی | https://pypi.org/project/crypt-dir/ |
| مجوز | MIT |
# CRYPT_DIR
- Encrypt all your files and write into another directory if there is update
- Clean the encrypted directory if files or directories have been deleted
- Restore
- Minimize writing to SSDs
# USAGE
- encrypt
```python
# User maintains two directories plain_dir and encrypted_dir
import crypt_dir
plain_dir = "plain"
encrypted_dir = "encrypted"
restored_dir = "restored"
key = crypt_dir.make_key_from_passphrase(b"passphrase1234")
# Delete all files, directories in encrypted_dir that don't exist in the plain_dir
crypt_dir.clean_encrypted_dir(
plain_dir=plain_dir,
encrypted_dir=encrypted_dir,
)
# read files in plain_dir, encrypt and write files into encrypted_dir if needed using 12 workers
crypt_dir.update_encrypted_dir(
key=key,
plain_dir=plain_dir,
encrypted_dir=encrypted_dir,
max_workers=12,
)
```
- restore
```python
import crypt_dir
plain_dir = "plain"
encrypted_dir = "encrypted"
restored_dir = "restored"
key = crypt_dir.make_key_from_passphrase(b"passphrase1234")
# restore all files in encrypted_dir using 12 workers
crypt_dir.restore_encrypted_dir(
key=key,
encrypted_dir=encrypted_dir,
restored_dir=restored_dir,
max_workers=12,
)
```
- certificate
```python
import crypt_dir
correct_passphrase = b"passphrase123"
cert = crypt_dir.make_certificate(correct_passphrase)
print("cert", cert)
try:
wrong_passphrase = b"passphrase456"
_ = crypt_dir.verify_certificate(cert, wrong_passphrase)
except AssertionError as e:
print("expected assertion error: ", e)
key = crypt_dir.verify_certificate(cert, correct_passphrase)
print("generated key from correct passphrase", key)
```
# INSTALLATION
```shell
pip install --upgrade crypt-dir
```
# DECRYPT IT YOURSELF
## SPECIFICATION 1.*
You don't need to know the specification. For some folks who want to know exactly what happened with their files, here
is the specification for `key_file` and `.enc` files:
- if `key_file` does not exist, `crypt_dir` will create a random key of 32 bytes using `os.urandom` encoded into `hex`
- two algorithms are used in `crypt_dir`: `SHA1` and `AES-256` in `CBC` mode
- encrypted files are updated only if file is modified (mtime changes)
- file is decrypt-able if `signature` matches `key`
- `.enc1` file
- `header`:
- `file_sig`: little-endian encoded mtime of file in uint64
- `key_sig`: `SHA1` bytes of key
- `file_size`: little-endian encoded file size in uint64
- `init_vec`: `AES256` initialization vector
- `file encrypted`: `AES256` file encrypted bytes with chunk size of `2^30`
```
__________________________________________________________________________________
| header | encrypted_data |
|___________________________________________________________|____________________|
| file_sig | key_sig | file_size | init_vec | encrypted_data |
| 8 bytes | 20 bytes | 8 bytes | 16 bytes | n bytes |
|___________________________________________________________|____________________|
```
## SPECIFICATION 0.*
You don't need to know the specification. For some folks who want to know exactly what happened with their files, here
is the specification for `key_file` and `.enc` files:
- if `key_file` does not exist, `crypt_dir` will create a random key of 32 bytes using `os.urandom` encoded into `hex`
- two algorithms are used in `crypt_dir`: `SHA1` and `AES-256` in `CBC` mode
- encrypted files are updated only if file_hash changes
- file is decrypt-able if `signature` matches `key`
- `.enc` file
- `signature`: `SHA1` bytes of key
- `file_hash`: `SHA1` bytes of file
- `file_size`: little-endian encoded file size in uint64
- `iv`: `AES256` initialization vector
- `file encrypted`: `AES256` file encrypted bytes with chunk size of `2^30`
```
| signature | file_hash | file_size | iv | encrypted_data |
| 20 bytes | 20 bytes | 8 bytes | 16 bytes | n bytes |
```
# UPLOAD
```shell
rm -rf dist crypt_dir.egg-info
python setup.py sdist
twine upload dist/*
```
نحوه نصب
نصب پکیج whl crypt-dir-1.1.9:
pip install crypt-dir-1.1.9.whl
نصب پکیج tar.gz crypt-dir-1.1.9:
pip install crypt-dir-1.1.9.tar.gz