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ECDH

In order to understand hex and type parameters read HASH

ECDH

spec
Description: Public-key cryptosystem
Problem: Discrete logarithm problem
Uses: Key exchange

How to ???

import requests
import json
import os,binascii
def sending(message):
url = 'http://127.0.0.1:6613/'
response = requests.post(url, data=message)
print response.content
return response.content
def ecdh(data_js):
req=json.loads(data_js)
curve=req["curve"]
print "Send gen parameters (A): \n " + json.dumps(req) +"\n"
data_js_n=sending(json.dumps(req))
answ=json.loads(data_js_n)
print "Recived gen parameters donde (A): \n" + (json.dumps(answ)) +"\n\n\n"
data_js_n=sending(json.dumps(req))
print "Send gen parameters (B): \n " + json.dumps(req) +"\n"
answ_1=json.loads(data_js_n)
print "Recived gen parameters donde (B): \n" + (json.dumps(answ_1)) +"\n\n\n"
gen='{ "version":1 , "algorithm":"ECDH","family": "", "privkey":"","sharedpub":"", "operation":"agree"}'
req=json.loads(gen)
req["privkey"]=answ["privkey"]
req["sharedpub"]=answ_1["pubkey"]
req["curve"]=curve
print "Send agreetment (A): \n " + json.dumps(req) +"\n"
data_js_n=sending(json.dumps(req))
answ_2=json.loads(data_js_n)
print "Recived agreetment donde (A): \n" + (json.dumps(answ_2)) +"\n\n\n"
req["privkey"]=answ_1["privkey"]
req["sharedpub"]=answ["pubkey"]
print "Send agreetment (B): \n " + json.dumps(req) +"\n"
data_js_n=sending(json.dumps(req))
answ_3=json.loads(data_js_n)
print "Recived agreetment donde (B): \n" + (json.dumps(answ_3)) +"\n\n\n"
ecdh_gen='{ "version": 1 , "algorithm":"ECDH", "curve":"secp256k1", "operation":"gen"}'
ecdh(ecdh_gen)
In this example we generate keys for A and B, and we make a key exchange between A and B.
On "curve" can be one of {"brainpoolP512r1","secp521r1","brainpoolP384r1","secp384r1","brainpoolP320r1","brainpoolP256r1", "secp256k1","sect571r1","sect571k1","sect409r1","sect409k1","sect283r1","sect283k1"}
Json to gen
{ "version": 1 , "algorithm":"ECDH", "curve":"curve flavor", "operation":"gen"}
Json to key agreetment
{ "version":1 , "algorithm":"ECDH","family": "", "privkey":" your hex privkey",
"sharedpub":"your partnert hex pubkey", "operation":"agree","curve":"curve flavor"}
Last modified 1yr ago