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Curve-25519

Why?
spec
Description: Public-key cryptosystem
Problem: Discrete logarithm problem
Uses: Digital signatures and Key exchange
  • It only supports "type":"string"

How to Ed25519?

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 ed25519(data_js):
req=json.loads(data_js)
print "Send gen parameters : \n " + json.dumps(req) +"\n"
data_js_n=sending(json.dumps(req))
answ=json.loads(data_js_n)
print "Recived ed25519 gen: \n"+(json.dumps(answ)) +"\n\n\n"
json_s=json_v='{ "version": 1 , "algorithm":"ED25519", "type":"string","plaintext": "Hello world!", "hex":0,"privkey": "" ,"operation":"sign"}'
req=json.loads(json_s)
req["privkey"]=answ["privkey"]
print "Send sign : \n " + json.dumps(req) +"\n"
data_js_n=sending(json.dumps(req))
answ_1=json.loads(data_js_n)
print "Recived sign done: \n"+(json.dumps(answ_1)) +"\n\n\n"
json_v='{ "version": 1 , "algorithm":"ED25519", "type":"string","plaintext": "Hello world!", "hex":0,"pubkey": "" ,"sign":"","operation":"verify"}'
req=json.loads(json_v)
req["pubkey"]=answ["pubkey"]
req["sign"]=answ_1["sign"]
print "Send verify : \n " + json.dumps(req) +"\n"
data_js_n=sending(json.dumps(req))
answ_2=json.loads(data_js_n)
print "Recived verify done: \n"+(json.dumps(answ_2)) +"\n\n\n"
ed25519_gen='{ "version": 1 , "algorithm":"ED25519", "operation":"gen"}'
ed25519(ed25519_gen)
Json to gen
{"operation": "gen", "version": 1, "algorithm": "ED25519"}
Json to sign
{"algorithm": "ED25519", "plaintext": "your string", "hex": BOOL, "version": 1, "operation": "sign",
"type": "string", "privkey": "your hex privkey"}
Json to verify
{"algorithm": "ED25519", "plaintext": "Hello world!", "pubkey": "your hex pubkey", "hex": BOOL,
"sign": "your hex signature", "version": 1, "operation": "verify", "type": "string"}

How to X25519?

import socket
import json
import os,binascii
def sending(message):
ip = '127.0.0.1'
port = 6613
BUFFER_SIZE = 65536
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((ip, port))
s.send(message)
data = s.recv(BUFFER_SIZE)
s.close()
return data
def x25519():
x25519_gen='{ "version": 1 , "algorithm":"X25519", "operation":"gen"}'
req=json.loads(x25519_gen)
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"
agree='{ "version":1 , "algorithm":"X25519", "privkey":"","sharedpub":"", "operation":"agree"}'
req=json.loads(agree)
req["privkey"]=answ["privkey"]
req["sharedpub"]=answ_1["pubkey"]
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"
x25519()
Json to gen
{"operation": "gen", "version": 1, "algorithm": "X25519"}
Json to agree
{"operation": "agree", "version": 1, "sharedpub": "your partnert hex pubkey",
"algorithm": "X25519", "privkey": "your hex privkey"}
Last modified 1yr ago