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| <h1 align="center">@hpke/core</h1> | ||
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| <div align="center"> | ||
| A TypeScript <a href="https://datatracker.ietf.org/doc/html/rfc9180">Hybrid Public Key Encryption (HPKE)</a> core module implemented using only <a href="https://www.w3.org/TR/WebCryptoAPI/">Web Cryptography API</a>. It does not support the X25519/X448-based KEMs and the ChaCha20Poly1305 AEAD, but it has no external module dependencies and is small in size.</div> | ||
| <p></p> | ||
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| <div align="center"> | ||
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| [Documentation](https://doc.deno.land/https://deno.land/x/hpke/core/mod.ts) | ||
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| </div> | ||
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| ## Index | ||
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| - [Installation](#installation) | ||
| - [Web Browser](#web-browser) | ||
| - [Node.js](#nodejs) | ||
| - [Deno](#deno) | ||
| - [Cloudflare Workers](#cloudflare-workers) | ||
| - [Usage](#usage) | ||
| - [Contributing](#contributing) | ||
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| ## Installation | ||
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| ### Web Browser | ||
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| Followings are how to use with typical CDNs. Other CDNs can be used as well. | ||
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| Using esm.sh: | ||
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| ```html | ||
| <!-- use a specific version --> | ||
| <script type="module"> | ||
| import * as hpke from "https://esm.sh/@hpke/[email protected]"; | ||
| // import { KemId, KdfId, AeadId, CipherSuite } from "https://esm.sh/@hpke/[email protected]"; | ||
| </script> | ||
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| <!-- use the latest stable version --> | ||
| <script type="module"> | ||
| import * as hpke from "https://esm.sh/@hpke/core"; | ||
| // ... | ||
| </script> | ||
| ``` | ||
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| Using unpkg: | ||
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| ```html | ||
| <!-- use a specific version --> | ||
| <script type="module"> | ||
| import * as hpke from "https://unpkg.com/@hpke/[email protected]/esm/mod.js"; | ||
| import { KemId, KdfId, AeadId, CipherSuite} from "https://unpkg.com/@hpke/[email protected]/esm/mod.js"; | ||
| // ... | ||
| </script> | ||
| ``` | ||
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| ### Node.js | ||
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| Using npm: | ||
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| ```sh | ||
| npm install @hpke/core | ||
| ``` | ||
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| Using yarn: | ||
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| ```sh | ||
| yarn add @hpke/core | ||
| ``` | ||
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| ### Deno | ||
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| Using deno.land: | ||
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| ```js | ||
| // use a specific version | ||
| import * as hpke from "https://deno.land/x/[email protected]/core/mod.ts"; | ||
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| // use the latest stable version | ||
| import * as hpke from "https://deno.land/x/hpke/core/mod.ts"; | ||
| ``` | ||
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| ### Cloudflare Workers | ||
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| ```sh | ||
| git clone [email protected]:dajiaji/hpke-js.git | ||
| cd hpke-js/core | ||
| npm install -g esbuild | ||
| deno task dnt | ||
| deno task minify > $YOUR_SRC_PATH/hpke-core.js | ||
| ``` | ||
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| ## Usage | ||
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| This section shows some typical usage examples. | ||
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| ### Browsers | ||
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| ```html | ||
| <html> | ||
| <head></head> | ||
| <body> | ||
| <script type="module"> | ||
| // import * as hpke from "https://esm.sh/[email protected]"; | ||
| import { KemId, KdfId, AeadId, CipherSuite } from "https://esm.sh/@hpke/[email protected]"; | ||
| globalThis.doHpke = async () => { | ||
| const suite = new CipherSuite({ | ||
| kem: KemId.DhkemP256HkdfSha256, | ||
| kdf: KdfId.HkdfSha256, | ||
| aead: AeadId.Aes128Gcm | ||
| }); | ||
| const rkp = await suite.generateKeyPair(); | ||
| const sender = await suite.createSenderContext({ | ||
| recipientPublicKey: rkp.publicKey | ||
| }); | ||
| const recipient = await suite.createRecipientContext({ | ||
| recipientKey: rkp.privateKey, // rkp (CryptoKeyPair) is also acceptable. | ||
| enc: sender.enc, | ||
| }); | ||
| // encrypt | ||
| const ct = await sender.seal(new TextEncoder().encode("hello world!")); | ||
| // decrypt | ||
| try { | ||
| const pt = await recipient.open(ct); | ||
| // hello world! | ||
| alert(new TextDecoder().decode(pt)); | ||
| } catch (err) { | ||
| alert("failed to decrypt."); | ||
| } | ||
| } | ||
| </script> | ||
| <button type="button" onclick="doHpke()">do HPKE</button> | ||
| </body> | ||
| </html> | ||
| ``` | ||
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| ### Node.js | ||
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| ```js | ||
| import { AeadId, CipherSuite, KdfId, KemId } from "@hpke/core"; | ||
| // const { KemId, KdfId, AeadId, CipherSuite } = require("@hpke/core"); | ||
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| async function doHpke() { | ||
| // setup | ||
| const suite = new CipherSuite({ | ||
| kem: KemId.DhkemP256HkdfSha256, | ||
| kdf: KdfId.HkdfSha256, | ||
| aead: AeadId.Aes128Gcm, | ||
| }); | ||
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| const rkp = await suite.generateKeyPair(); | ||
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| const sender = await suite.createSenderContext({ | ||
| recipientPublicKey: rkp.publicKey, | ||
| }); | ||
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| const recipient = await suite.createRecipientContext({ | ||
| recipientKey: rkp.privateKey, | ||
| enc: sender.enc, | ||
| }); | ||
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| // encrypt | ||
| const ct = await sender.seal(new TextEncoder().encode("my-secret-message")); | ||
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| // decrypt | ||
| try { | ||
| const pt = await recipient.open(ct); | ||
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| console.log("decrypted: ", new TextDecoder().decode(pt)); | ||
| // decrypted: my-secret-message | ||
| } catch (err) { | ||
| console.log("failed to decrypt."); | ||
| } | ||
| } | ||
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| doHpke(); | ||
| ``` | ||
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| ### Deno | ||
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| ```js | ||
| import { KdfId, AeadId, CipherSuite } from "https://deno.land/x/[email protected]/core/mod.ts"; | ||
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| async function doHpke() { | ||
| // setup | ||
| const suite = new CipherSuite({ | ||
| kem: KemId.DhkemP256HkdfSha256, | ||
| kdf: KdfId.HkdfSha256, | ||
| aead: AeadId.Aes128Gcm, | ||
| }); | ||
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| const rkp = await suite.generateKeyPair(); | ||
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| const sender = await suite.createSenderContext({ | ||
| recipientPublicKey: rkp.publicKey, | ||
| }); | ||
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| const recipient = await suite.createRecipientContext({ | ||
| recipientKey: rkp.privateKey, | ||
| enc: sender.enc, | ||
| }); | ||
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| // encrypt | ||
| const ct = await sender.seal(new TextEncoder().encode("my-secret-message")); | ||
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| try { | ||
| // decrypt | ||
| const pt = await recipient.open(ct); | ||
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| console.log("decrypted: ", new TextDecoder().decode(pt)); | ||
| // decrypted: my-secret-message | ||
| } catch (_err: unknown) { | ||
| console.log("failed to decrypt."); | ||
| } | ||
| } | ||
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| doHpke(); | ||
| ``` | ||
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| ## Contributing | ||
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| We welcome all kind of contributions, filing issues, suggesting new features or | ||
| sending PRs. |
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