vikramacharya

import datetime

def create_signing_string(digest_base64, created=None, expires=None):
    if created is None:
        created = int(datetime.datetime.now().timestamp())
    if expires is None:
        expires = int((datetime.datetime.now() + datetime.timedelta(hours=1)).timestamp())
    signing_string = f"""(created): {created}
(expires): {expires}
digest: BLAKE-512={digest_base64}"""

vikramacharya

import base64
import datetime
import os
import re
import json
import nacl.encoding
import nacl.hash
from nacl.bindings import crypto_sign_ed25519_sk_to_seed
from nacl.signing import SigningKey, VerifyKey

vikramacharya

import base64
import datetime
import os
import re
import json
import nacl.encoding
import nacl.hash
from nacl.bindings import crypto_sign_ed25519_sk_to_seed
from nacl.signing import SigningKey, VerifyKey

vikramacharya

{
  "context": {
    "domain": "nic2004:52110",
    "action": "search",
    "country": "IND",
    "city": "std:080",
    "core_version": "1.0.0",
    "bpp_id": "",
    "bpp_uri": "",
    "bap_id": "bap_subcriber_id",

vikramacharya

Authorization : Signature keyId="{subscriber_id}|{unique_key_id}|{algorithm}",algorithm="ed25519",created="1606970629",expires="1607030629",headers="(created) (expires) digest",signature="Base64(ed25519_sign(signing string))"

vikramacharya

import sodium, { base64_variants } from "libsodium-wrappers";

vikramacharya

const created = Math.floor(new Date().getTime() / 1000).toString();
const expires = (parseInt(created) + (1 * 60 * 60)).toString(); 

vikramacharya

const digest = sodium.crypto_generichash(64, sodium.from_string(message));
const digest_base64 = sodium.to_base64(digest, base64_variants.ORIGINAL);

vikramacharya

const signing_string = `(created): ${created}
(expires): ${expires}
digest: BLAKE-512=${digest_base64}`;

vikramacharya

const signedMessage = sodium.crypto_sign_detached(signing_string, sodium.from_base64(privateKey, base64_variants.ORIGINAL));
const signedMessage_ = sodium.to_base64(signedMessage, base64_variants.ORIGINAL);