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## ecgen
Tool for generating Elliptic curve domain parameters.
### Usage
#### ecgen
The main binary of the tool, does the hard work.
`
ecgen --fp/--f2m -r -p BITS
`
- `--fp`/`--f2m` specifies the field type (prime/binary).
- `-r/--random` requests a random curve to be generated.
- `-p/--prime` requests the curve order to be prime.
- `-s/--seed=[SEED]` requests to generate a curve based on the ANSI X9.62 generation process and seed `SEED`.
- `-o/--output=FILE` writes output to `FILE`.
- `-f/--input=FILE` reads input from `FILE`.
- `-a/--append` appends to output file (doesn't overwrite it).
- `-d/--datadir=DIR` specifies the PARI/GP datadir containing the `seadata` package.
### Build
`
git clone https://github.com/J08nY/ecgen.git
cd ecgen
make
`
### Requirements
- PARI/GP
- parson
ecgen uses the [PARI/GP](http://pari.math.u-bordeaux.fr/) library for elliptic
curve arithmetic and it's SEA point counting algorithm implementation. It also requires the
additional [seadata](http://pari.math.u-bordeaux.fr/packages.html) package (seadata and seadata-big recommended for large curves).
[parson](https://github.com/kgabis/parson) is used to output curve parameters in JSON format.
### License
`
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
`
*© Eastern Seaboard Phishing Authority*
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