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https://github.com/snosme/mytopsecret-data
https://github.com/snosme/mytopsecret-data
argon2 datamatrix password-manager
Last synced: 21 days ago
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- Host: GitHub
- URL: https://github.com/snosme/mytopsecret-data
- Owner: SnosMe
- License: gpl-3.0
- Created: 2020-08-03T11:11:06.000Z (over 4 years ago)
- Default Branch: master
- Last Pushed: 2021-06-01T21:16:03.000Z (over 3 years ago)
- Last Synced: 2024-10-15T23:59:40.276Z (2 months ago)
- Topics: argon2, datamatrix, password-manager
- Language: C
- Homepage: https://snosme.github.io/MyTopSecret-Data/
- Size: 5.3 MB
- Stars: 0
- Watchers: 3
- Forks: 2
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
## MyTopSecret-Data
Encrypts data with emphasis on storage space.
### Binary layout
```
|0,1|2,3,4|5,6,7|8........n|
[0; 1] - CRC16 of [2; n]
[2; 4] - Is payload compressed (1 bit), Time in hours since epoch (23 bit)
[5; 7] - Random bytes
[8; n] - AES encrypted data
```
### Use cases
- Printing in Hex format or as a 2D barcode:
- physical backup for important passwords
### Quick guide
Create file with content:
```
url: github
email: [email protected]
password: 12345678
---
url: discord
email: [email protected]
password: 87654321
```
Encrypt
```bash
mtsd -e plaintext.mtsd -o encrypted.bin
```
Decrypt
```bash
mtsd encrypted.bin
```
### Encryption
```
pwd = from_user_input()
salt = derive_salt_from([time_now, random_bytes])
key, nonce = Argon2id(iter=3,mem=64MB,parallel=2)
encrypted = AES256_CTR(data, key, nonce)
```
### Compatibility
Backward compatibility is not supported in the current implementation. Any changes to Argon2 complexity or LZMA parameters will break the ability to decrypt old data.\
This project was created for personal use.
### Comparison with password managers
- 1Password\
https://1password.com/files/1Password-White-Paper.pdf
Master Password + Secret key (Account key, ~16 bytes, stored local only)\
PBKDF2-HMAC-SHA256 with 100,000+100,000 iterations\
AES-256-GCM
- Dashlane\
https://www.dashlane.com/download/Dashlane_SecurityWhitePaper_September2019.pdf
Argon2d with 3 iterations, 32 MB memory cost, and 2 parallel tasks\
or PBKDF2-HMAC-SHA256 with 200,000 iterations\
AES-256-CBC
- LastPass\
https://enterprise.lastpass.com/wp-content/uploads/LastPass-Technical-Whitepaper-3.pdf
PBKDF2-HMAC-SHA256 with 100,100 iterations\
AES-256-CBC