blob: c8f787cbfaa17849cc743c45f666fe2d7fb3464b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
## ecgen
Tool for generating Elliptic curve domain parameters.
Currently only supports curves over prime fields.
### Usage
#### ecgen
The main binary of the tool, does the hard work.
```
ecgen [-l|-s|-p]
-l for point with the largest prime order on the curve
-s for point with the smallest prime order on the curve
-p for a generator of the whole curve as well as a smallest prime order point(pubkey)
```
ecgen then reads three lines of input:
`p`
`a`
`b`
the curve is then specified as `E(Fp): y^2 = x^3 + a x + b mod p`
#### gen.sh
Utility script, uses openssl to generate the *p*, *a*, *b* parameters
required for ecgen.
```
gen.sh [-l|-s|-p] [num_curves] [prime_size] [timeout]
```
*p* is `prime_size` bits prime number, *a* and *b* are `prime_size` bits
random numbers.
This script will generate `num_curves` curves with random parameters.
It requires a timeout value, as the curve order computation can get really
slow for some unfortunate curve parameters, it is therefore more effective
to skip those after some timeout.
|
