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libsodium
Advanced tools
Package description
libsodium is a modern, easy-to-use software library for encryption, decryption, signatures, password hashing, and more. It is designed to be a portable, cross-compilable, installable, and packageable fork of NaCl, with a compatible API.
Public Key Cryptography
This feature allows you to perform public key cryptography operations such as encryption and decryption. The code sample demonstrates generating a key pair, encrypting a message, and logging the ciphertext and nonce.
const sodium = require('libsodium-wrappers');
(async() => {
await sodium.ready;
const keyPair = sodium.crypto_box_keypair();
const message = 'Hello, World!';
const nonce = sodium.randombytes_buf(sodium.crypto_box_NONCEBYTES);
const cipherText = sodium.crypto_box_easy(message, nonce, keyPair.publicKey, keyPair.privateKey);
console.log({ cipherText, nonce });
})();
Secret Key Cryptography
This feature allows you to perform secret key cryptography operations such as encryption and decryption. The code sample demonstrates generating a key, encrypting a message, and logging the ciphertext and nonce.
const sodium = require('libsodium-wrappers');
(async() => {
await sodium.ready;
const key = sodium.randombytes_buf(sodium.crypto_secretbox_KEYBYTES);
const nonce = sodium.randombytes_buf(sodium.crypto_secretbox_NONCEBYTES);
const message = 'Hello, World!';
const cipherText = sodium.crypto_secretbox_easy(message, nonce, key);
console.log({ cipherText, nonce });
})();
Password Hashing
This feature allows you to hash passwords securely. The code sample demonstrates hashing a password and logging the hashed password.
const sodium = require('libsodium-wrappers');
(async() => {
await sodium.ready;
const password = 'mysecretpassword';
const hashedPassword = sodium.crypto_pwhash_str(password, sodium.crypto_pwhash_OPSLIMIT_INTERACTIVE, sodium.crypto_pwhash_MEMLIMIT_INTERACTIVE);
console.log({ hashedPassword });
})();
Digital Signatures
This feature allows you to create and verify digital signatures. The code sample demonstrates generating a key pair, signing a message, and logging the signed message.
const sodium = require('libsodium-wrappers');
(async() => {
await sodium.ready;
const keyPair = sodium.crypto_sign_keypair();
const message = 'Hello, World!';
const signedMessage = sodium.crypto_sign(message, keyPair.privateKey);
console.log({ signedMessage });
})();
The 'crypto' module in Node.js provides cryptographic functionality that includes a set of wrappers for OpenSSL's hash, HMAC, cipher, decipher, sign, and verify functions. It is built into Node.js and does not require additional installation. While it offers a wide range of cryptographic operations, it may not be as user-friendly or modern as libsodium.
TweetNaCl is a cryptographic library that is a port of the Networking and Cryptography library (NaCl) to JavaScript. It is designed to be small, fast, and easy to use. While it offers similar functionalities to libsodium, it may lack some of the advanced features and optimizations found in libsodium.
bcrypt is a password hashing function designed for secure password storage. It is widely used and well-tested, but it is specialized for password hashing and does not offer the broader range of cryptographic functionalities that libsodium provides.
Readme
The sodium crypto library compiled to pure JavaScript using Emscripten, with automatically generated wrappers to make it easy to use in web applications.
The complete library weights 151 Kb (minified, gzipped) and can run in a web browser as well as server-side.
Supported browsers/JS engines:
Ready-to-use files based on libsodium 1.0.5 can be directly copied to your project.
Use Bower:
$ bower install libsodium.js
or directly include a copy of the sodium.min.js file.
Including the sodium.min.js
file will add a sodium
object to the
global namespace.
If a sodium
object is already present in the global namespace, and
the sodium.onload
function is defined, this function will be called
right after the library has been loaded and initialized.
<script>
window.sodium = { onload: function(sodium) {
alert(sodium.to_hex(sodium.crypto_generichash(64, 'test')));
}};
</script>
...
<script src="sodium.js" async defer></script>
As an alternative, use a module loader or Browserify as described below.
Copy the .js
files for libsodium and libsodium-wrappers
to your project and load the libsodium-wrappers
module.
Alternatively, use npm. The npm package is
called libsodium-wrappers
and includes a dependency on the raw
libsodium
module.
var sodium = require('libsodium-wrappers');
console.log(sodium.to_hex(sodium.crypto_generichash(64, 'test')));
crypto_aead
(ChaCha20-Poly1305)crypto_auth
(SHA256, SHA512, and the default crypto_auth with SHA512/256)crypto_box
crypto_box_seal
crypto_generichash
(Blake2b)crypto_hash
(SHA512/256)crypto_onetimeauth
(Poly1305)crypto_pwhash
(scrypt)crypto_scalarmult
(Curve25519)crypto_secretbox
crypto_shorthash
(SipHash)crypto_sign
(Ed25519)randombytes
from_base64()
, to_base64()
from_hex()
, to_hex()
from_string()
, to_string()
memcmp()
(constant-time check for equality, returns true
or false
)compare() (constant-time comparison. Values must have the same size. Returns
-1,
0or
1`)memzero()
(applies to Uint8Array
objects)increment()
(increments an arbitrary-long number stored as a
little-endian Uint8Array
- typically to increment nonces)The API exposed by the wrappers is identical to the one of the C library, except that buffer lengths never need to be explicitly given.
Binary input buffers should be Uint8Array
objects. However, if a string
is given instead, the wrappers will automatically convert the string
to an array containing a UTF-8 representation of the string.
Example:
var key = sodium.randombytes_buf(sodium.crypto_shorthash_KEYBYTES),
hash1 = sodium.crypto_shorthash(new Uint8Array([1, 2, 3, 4]), key),
hash2 = sodium.crypto_shorthash('test', key);
If the output is a unique binary buffer, it is returned as a
Uint8Array
object.
However, an extra parameter can be given to all wrapped functions, in order to specify what format the output should be in. Valid options are `uint8array' (default), 'text', 'hex' and 'base64'.
Example:
var key = sodium.randombytes_buf(sodium.crypto_shorthash_KEYBYTES),
hash_hex = sodium.crypto_shorthash('test', key, 'hex');
In addition, the from_base64
, to_base64
, from_hex
, to_hex
,
from_string
, and to_string
functions are available to explicitly
convert base64, hexadecimal, and arbitrary string representations
from/to Uint8Array
objects.
Functions returning more than one output buffer are returning them as
an object. For example, the sodium.crypto_box_keypair()
function
returns the following object:
{ keyType: 'curve25519', privateKey: (Uint8Array), publicKey: (Uint8Array) }
If you want to compile the files yourself, the following dependencies need to be installed on your system:
npm install -g mocha
)npm install -g node-zopfli
)Running make
will clone libsodium, build it, test it, build the
wrapper, and create the modules and minified distribution files.
The build available in this repository does not contain all the functions available in the original libsodium library.
Providing that you have all the build dependencies installed, here is how you can build libsodium.js to include the functions you need :
git clone https://github.com/jedisct1/libsodium.js
cd ./libsodium.js
# Get the original C version of libsodium and configure it
make libsodium/configure
# Modify the emscripten.sh
# Specifically, add the name of the missing functions and constants in the "EXPORTED_FUNCTIONS" array.
# Ensure that the name begins with an underscore and that it is between double quotes.
nano libsodium/dist-build/emscripten.sh
# Build libsodium, and then libsodium.js with your chosen functions
make
NOTE: for each of the functions/constants you add, make sure that the corresponding symbol files exist in the wrapper/symbols
folder and that the constants are listed in the wrapper/constants.json
file.
Built by Ahmad Ben Mrad and Frank Denis.
This wrapper is distributed under the ISC License.
FAQs
Unknown package
We found that libsodium demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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