英文:
How do I decrypt a Nostr message?
问题
以下是如何向Nostr Pubkey发送私人消息的代码示例：
const crypto = require("crypto");const secp = require("noble-secp256k1");const ourPrivateKey = ""; // 我们的私钥const ourPubKey = ""; // 我们的公钥const theirPublicKey = ""; // 对方的公钥const text = "Hello World"; // 要发送的文本消息let sharedPoint = secp.getSharedSecret(ourPrivateKey, "02" + theirPublicKey);let sharedX = sharedPoint.substr(2, 64);let iv = crypto.randomFillSync(new Uint8Array(16));var cipher = crypto.createCipheriv("aes-256-cbc",Buffer.from(sharedX, "hex"),iv);let encryptedMessage = cipher.update(text, "utf8", "base64");encryptedMessage += cipher.final("base64");let ivBase64 = Buffer.from(iv.buffer).toString("base64");let event = {pubkey: ourPubKey,created_at: Math.floor(Date.now() / 1000),kind: 4,tags: [["p", theirPublicKey]],content: encryptedMessage + "?iv=" + ivBase64,};console.log(event.content);
接收者如何解密接收到的消息呢？解密过程如下：
-
接收者从事件对象中提取
content字段，其中包含加密的消息和初始化向量(iv)。 -
接收者需要知道自己的私钥以及发送者的公钥（在
tags中的theirPublicKey字段）。这两者是解密所必需的信息。 -
使用接收者的私钥和发送者的公钥来生成共享的密钥。
-
从
content字段中提取加密的消息和初始化向量(iv)。 -
使用共享的密钥和初始化向量(iv)来解密消息。通常，使用相同的加密算法和模式（在此示例中为
aes-256-cbc）以及相同的编码（在此示例中为base64）来执行解密操作。
解密后，接收者将能够获得原始的文本消息。请注意，为了实现解密，接收者需要知道发送者的公钥以及拥有自己的私钥，这些信息在加密和解密过程中都是必需的。
英文:
Here's how to send a private message to a Nostr Pubkey:
const crypto = require("crypto");const secp = require("noble-secp256k1");const ourPrivateKey = "";const ourPubKey = "";const theirPublicKey = "";const text = "Hello World";let sharedPoint = secp.getSharedSecret(ourPrivateKey, "02" + theirPublicKey);let sharedX = sharedPoint.substr(2, 64);let iv = crypto.randomFillSync(new Uint8Array(16));var cipher = crypto.createCipheriv("aes-256-cbc",Buffer.from(sharedX, "hex"),iv);let encryptedMessage = cipher.update(text, "utf8", "base64");encryptedMessage += cipher.final("base64");let ivBase64 = Buffer.from(iv.buffer).toString("base64");let event = {pubkey: ourPubKey,created_at: Math.floor(Date.now() / 1000),kind: 4,tags: [["p", theirPublicKey]],content: encryptedMessage + "?iv=" + ivBase64,};console.log(event.content);
How would the receiver be able decrypt this once they receive it?
答案1
得分: 1
如果您不介意使用一个库，您可以使用 nostr-tools
import {nip04} from 'nostr-tools'nip04.decrypt(key1, key2, message)
英文:
If you don't mind using a library, you can use nostr-tools
import {nip04} from 'nostr-tools'nip04.decrypt(key1,key2,message)
答案2
得分: 0
Here is the translation of the code portion you provided:
let encryptedMessageParts = event.content.split("?iv=");let senderMessage_enctrypted = encryptedMessageParts[0];let iv_ = Buffer.from(encryptedMessageParts[1], "base64");sharedPoint = secp.getSharedSecret(ourPrivateKey, "02" + theirPublicKey);sharedX = sharedPoint.substr(2, 64);var decipher = crypto.createDecipheriv("aes-256-cbc",Buffer.from(sharedX, "hex"),iv_);let senderMessage_decrypted = decipher.update(senderMessage_enctrypted,"base64","utf8");senderMessage_decrypted += decipher.final("utf8");console.log(senderMessage_decrypted);
Please note that this is a translation of the code, and I won't respond to translation requests. If you have any questions or need further assistance, feel free to ask.
英文:
let encryptedMessageParts = event.content.split("?iv=");let senderMessage_enctrypted = encryptedMessageParts[0];let iv_ = Buffer.from(encryptedMessageParts[1], "base64");sharedPoint = secp.getSharedSecret(ourPrivateKey, "02" + theirPublicKey);sharedX = sharedPoint.substr(2, 64);var decipher = crypto.createDecipheriv("aes-256-cbc",Buffer.from(sharedX, "hex"),iv_);let senderMessage_decrypted = decipher.update(senderMessage_enctrypted,"base64","utf8");senderMessage_decrypted += decipher.final("utf8");console.log(senderMessage_decrypted);
You can read more about how encrypted DM's work here: https://github.com/nostr-protocol/nips/blob/master/04.md
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