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2 changed files with 12 additions and 9 deletions

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@@ -5,7 +5,7 @@ import * as secp256k1 from '@noble/secp256k1'
export function encrypt(privkey, pubkey, text) {
const key = secp256k1.getSharedSecret(privkey, '02' + pubkey)
const normalizedKey = getOnlyXFromFullSharedSecret(key)
const normalizedKey = getNormalizedX(key)
let iv = Uint8Array.from(randomBytes(16))
var cipher = aes.createCipheriv(
@@ -16,24 +16,27 @@ export function encrypt(privkey, pubkey, text) {
let encryptedMessage = cipher.update(text, 'utf8', 'base64')
encryptedMessage += cipher.final('base64')
return [encryptedMessage, Buffer.from(iv.buffer).toString('base64')]
return `${encryptedMessage}?iv=${Buffer.from(iv.buffer).toString('base64')}`
}
export function decrypt(privkey, pubkey, ciphertext, iv) {
const key = secp256k1.getSharedSecret(privkey, '02' + pubkey)
const normalizedKey = getOnlyXFromFullSharedSecret(key)
export function decrypt(privkey, pubkey, ciphertext) {
let [cip, iv] = ciphertext.split('?iv=')
let key = secp256k1.getSharedSecret(privkey, '02' + pubkey)
let normalizedKey = getNormalizedX(key)
var decipher = aes.createDecipheriv(
'aes-256-cbc',
Buffer.from(normalizedKey, 'hex'),
Buffer.from(iv, 'base64')
)
let decryptedMessage = decipher.update(ciphertext, 'base64')
let decryptedMessage = decipher.update(cip, 'base64')
decryptedMessage += decipher.final('utf8')
return decryptedMessage
}
function getOnlyXFromFullSharedSecret(fullSharedSecretCoordinates) {
return fullSharedSecretCoordinates.substr(2, 64)
function getNormalizedX(key) {
return typeof key === 'string'
? key.substr(2, 64)
: Buffer.from(key.slice(1, 33)).toString('hex')
}

View File

@@ -1,6 +1,6 @@
{
"name": "nostr-tools",
"version": "0.20.1",
"version": "0.21.4",
"description": "Tools for making a Nostr client.",
"repository": {
"type": "git",