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|
Onetimebluh (Workbluhp in blogress!!)
======================================
Simple implementation of One Time Pad cipher.
Capable of generating cryptographically strong random number keys and of usign them to encrypt/decrypt messages of same length with a bitwise XOR function.
Build
-------
Still usign just gcc. Compile only for testing. Openssl libraries are needed and must be linked to gcc with the option `-lcrypto`. Here follows an example:
```
gcc -Wall -Wpedantic -lcrypto onetimebluh.c -o onetimebluh -v
```
Usage
-------
Example creates two keys of length 4096 bytes and use the first as a message and the second as the pad key (just for testing):
```
onetimebluh --key-gen --nbytes 4096 --output message
onetimebluh --key-gen --nbytes 4096 --output pad
onetimebluh --encrypt message --key-file pad --output encrypted-message
onetimebluh --decrypt encrypted-message --key-file pad --outptut decrypted-message
```
Is recommended to use the `-t` option in order to be sure not to use more than once the same pieces of the pad to encrypt your data. Here follows an other example:
```
onetimebluh --encrypt message --key-file pad --output encrypted-message --tear-page
```
Or using the short options:
```
onetimebluh -te message -k pad -o encrypted-message
```
You can print the help by running `onetimebluh --help` or `onetimebluh -h`.
```
ONETIMEBLUH USAGE:
onetimebluh [COMMAND] [OPTIONS] ...
COMMANDS:
-d, --decrypt=FILE decrypt message (input) same as --encrypt, just for the feeling
-e, --encrypt=FILE encrypt message (input)
-h, --help print this help
-g, --key-gen create key file
OPTIONS
-k, --key-file=FILE use key (input)
-b, --nbytes=NUM number of bytes
-o, --output=FILE output name
-t, --tear-page deletes from the pad file the bytes used to encrypt/decrypt
Onetimebluh project repository at https://git.eigenlab.org/seppia/onetimebluh
```
|
