Curve-25519

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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?
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import requests
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import json
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import os,binascii
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​
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def sending(message):
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    url = 'http://127.0.0.1:6613/'
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    response = requests.post(url, data=message)
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    print response.content
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    return response.content
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​
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def ed25519(data_js):
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    req=json.loads(data_js)
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    print "Send gen parameters : \n " + json.dumps(req) +"\n"
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    data_js_n=sending(json.dumps(req))
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    answ=json.loads(data_js_n)
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    print "Recived  ed25519 gen: \n"+(json.dumps(answ)) +"\n\n\n"
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    json_s=json_v='{ "version": 1 , "algorithm":"ED25519", "type":"string","plaintext": "Hello world!", "hex":0,"privkey": "" ,"operation":"sign"}'
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    req=json.loads(json_s)
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    req["privkey"]=answ["privkey"]
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    print "Send sign : \n " + json.dumps(req) +"\n"
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    data_js_n=sending(json.dumps(req))
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    answ_1=json.loads(data_js_n)
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    print "Recived  sign done: \n"+(json.dumps(answ_1)) +"\n\n\n"
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    json_v='{ "version": 1 , "algorithm":"ED25519", "type":"string","plaintext": "Hello world!", "hex":0,"pubkey": "" ,"sign":"","operation":"verify"}'
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    req=json.loads(json_v)
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    req["pubkey"]=answ["pubkey"]
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    req["sign"]=answ_1["sign"]
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    print "Send verify : \n " + json.dumps(req) +"\n"
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    data_js_n=sending(json.dumps(req))
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    answ_2=json.loads(data_js_n)
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    print "Recived  verify done: \n"+(json.dumps(answ_2)) +"\n\n\n"
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​
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ed25519_gen='{ "version": 1 , "algorithm":"ED25519", "operation":"gen"}'
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ed25519(ed25519_gen)
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Json to gen
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{"operation": "gen", "version": 1, "algorithm": "ED25519"}
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Json to sign
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{"algorithm": "ED25519", "plaintext": "your string", "hex": BOOL, "version": 1, "operation": "sign", 
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"type": "string", "privkey": "your hex privkey"}
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Json to verify
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{"algorithm": "ED25519", "plaintext": "Hello world!", "pubkey": "your hex pubkey", "hex": BOOL, 
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"sign": "your hex signature", "version": 1, "operation": "verify", "type": "string"}
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How to X25519?
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import socket
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import json
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import os,binascii
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​
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def sending(message):
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    ip = '127.0.0.1'
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    port = 6613
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    BUFFER_SIZE = 65536
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    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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    s.connect((ip, port))
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    s.send(message)
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    data = s.recv(BUFFER_SIZE)
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    s.close()
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    return data
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​
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def x25519():
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    x25519_gen='{ "version": 1 , "algorithm":"X25519", "operation":"gen"}'
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    req=json.loads(x25519_gen)
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    print "Send gen parameters (A): \n " + json.dumps(req) +"\n"
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    data_js_n=sending(json.dumps(req))
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    answ=json.loads(data_js_n)
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    print "Recived gen parameters donde (A): \n" + (json.dumps(answ)) +"\n\n\n"
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    data_js_n=sending(json.dumps(req))
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    print "Send gen parameters (B): \n " + json.dumps(req) +"\n"
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    answ_1=json.loads(data_js_n)
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    print "Recived gen parameters donde (B): \n" + (json.dumps(answ_1)) +"\n\n\n"
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    agree='{ "version":1 , "algorithm":"X25519", "privkey":"","sharedpub":"", "operation":"agree"}'
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    req=json.loads(agree)
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    req["privkey"]=answ["privkey"]
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    req["sharedpub"]=answ_1["pubkey"]
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    print "Send agreetment (A): \n " + json.dumps(req) +"\n"
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    data_js_n=sending(json.dumps(req))
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    answ_2=json.loads(data_js_n)
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    print "Recived agreetment donde (A): \n" + (json.dumps(answ_2)) +"\n\n\n"
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    req["privkey"]=answ_1["privkey"]
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    req["sharedpub"]=answ["pubkey"]
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    print "Send agreetment (B): \n " + json.dumps(req) +"\n"
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    data_js_n=sending(json.dumps(req))
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    answ_3=json.loads(data_js_n)
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    print "Recived agreetment donde (B): \n" + (json.dumps(answ_3)) +"\n\n\n"
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​
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x25519()
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Json to gen
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{"operation": "gen", "version": 1, "algorithm": "X25519"}
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Json to agree
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{"operation": "agree", "version": 1, "sharedpub": "your partnert hex pubkey", 
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"algorithm": "X25519", "privkey": "your hex privkey"}
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ECDH
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Contents
How to Ed25519?
How to X25519?