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Package halite
Short Description High-level cryptography interface powered by libsodium
License MPL-2.0
Homepage https://github.com/paragonie/halite
Informations about the package halite
Halite
Halite is a high-level cryptography interface that relies on libsodium for all of its underlying cryptography operations.
Halite was created by Paragon Initiative Enterprises as a result of our continued efforts to improve the ecosystem and make cryptography in PHP safer and easier to implement.
You can read the Halite Documentation online.
Halite is released under Mozilla Public License 2.0. Commercial licenses are available from Paragon Initiative Enterprises if you wish to extend Halite without making your derivative works available under the terms of the MPL.
If you are satisfied with the terms of MPL software for backend web applications but would like to purchase a support contract for your application that uses Halite, those are also offered by Paragon Initiative Enterprises.
Important: Earlier versions of Halite were available under the GNU Public License version 3 (GPLv3). Only Halite 4.0.1 and newer are available under the Mozilla Public License terms.
Installing Halite
Before you can use Halite, you must choose a version that fits the requirements of your project. The differences between the requirements for the available versions of Halite are briefly highlighted below.
PHP | libsodium | PECL libsodium | Support | |
---|---|---|---|---|
Halite 5.1 and newer | 8.1.0 | 1.0.18 | N/A (standard) | :heavy_check_mark: Active |
Halite 5.0.x | 8.0.0 | 1.0.18 | N/A (standard) | :heavy_check_mark: Active |
Halite 4.1+ | 7.2.0 | 1.0.15 | N/A (standard) | :x: Not Supported |
Halite 4.0 | 7.2.0 | 1.0.13 | N/A (standard) | :x: Not Supported |
Halite 3 | 7.0.0 | 1.0.9 | 1.0.6 / 2.0.4 | :x: Not Supported |
Halite 2 | 7.0.0 | 1.0.9 | 1.0.6 | :x: Not Supported |
Halite 1 | 5.6.0 | 1.0.6 | 1.0.2 | :x: Not Supported |
Note: Halite 5.0.x works on PHP 8.0, but performance is worse than on PHP 8.1.
If you need a version of Halite before 5.1, see the documentation relevant to that particular branch.
To install Halite, you first need to install libsodium. You may or may not need the PHP extension. For most people, this means running...
sudo apt-get install php7.2-sodium
...or an equivalent command for your operating system and PHP version.
If you're stuck, this step-by-step guide contributed by @aolko may be helpful.
Once you have the prerequisites installed, install Halite through Composer:
composer require paragonie/halite:^5
Commercial Support for Older Halite Versions
Free (gratis) support for Halite only extends to the most recent major version (currently 5).
If your company requires support for an older version of Halite, contact Paragon Initiative Enterprises to inquire about commercial support options.
If you need an easy way to migrate from older versions of Halite, check out halite-legacy.
Using Halite in Your Project
Check out the documentation. The basic Halite API is designed for simplicity:
- Encryption
- Symmetric
Symmetric\Crypto::encrypt
(EncryptionKey
):string
Symmetric\Crypto::encryptWithAD
(EncryptionKey
,string
):string
Symmetric\Crypto::decrypt
(string
,HiddenString
Symmetric\Crypto::decryptWithAD
(string
,HiddenString
- Asymmetric
- Anonymous
Asymmetric\Crypto::seal
(EncryptionPublicKey
):string
Asymmetric\Crypto::unseal
(string
,HiddenString
- Authenticated
Asymmetric\Crypto::encrypt
(EncryptionPublicKey
):string
Asymmetric\Crypto::encryptWithAD
(EncryptionPublicKey
,string
):string
Asymmetric\Crypto::decrypt
(string
,HiddenString
Asymmetric\Crypto::decryptWithAD
(string
,HiddenString
- Anonymous
- Symmetric
- Authentication
- Symmetric
Symmetric\Crypto::authenticate
(string
,AuthenticationKey
):string
Symmetric\Crypto::verify
(string
,AuthenticationKey
,string
):bool
- Asymmetric
Asymmetric\Crypto::sign
(string
,SignatureSecretKey
):string
Asymmetric\Crypto::verify
(string
,SignaturePublicKey
,string
):bool
- Symmetric
Example: Encrypting and Decrypting a message
First, generate and persist a key exactly once:
And then you can encrypt/decrypt messages like so:
This should produce something similar to:
MUIDAEpQznohvNlQ-ZRk-ZZ59Mmox75D_FgAIrXY2cUfStoeL-GIeAe0m-uaeURQdPsVmc5XxRw3-2x5ZAsZH_es37qqFuLFjUI-XK9uG0s30YTsorWfpHdbnqzhRuUOI09c-cKrfMQkNBNm0dDDwZazjTC48zWikRHSHXg8NXerVDebzng1aufc_S-osI_zQuLbZDODujEnpbPZhMMcm4-SWuyVXcBPdGZolJyT
Cryptographic Keys in Halite
Important: Halite works with
Key
objects, not strings.
If you attempt to echo
a key object, you will get an empty string
rather than its contents. If you attempt to var_dump()
a key object,
you will just get some facts about the type of key it is.
You must invoke $obj->getRawKeyMaterial()
explicitly if you want
to inspect a key's raw binary contents. This is not recommended for
most use cases.
Example: Generating a key from a password
A key derived from a password can be used in place of one randomly generated.
Example: Encrypting a large file on a system with low memory
Halite includes a file cryptography class that utilizes a streaming API to allow large files (e.g. gigabytes) be encrypted on a system with very little available memory (i.e. less than 8 MB).
Common Support Issues
Uncaught SodiumException: Cannot Wipe Memory
PHP Fatal error: Uncaught SodiumException: This is not implemented, as it is not possible to securely wipe memory from PHP
The solution to this is to make sure libsodium is installed/enabled. See above in this README for more information.
Support Contracts
If your company uses this library in their products or services, you may be interested in purchasing a support contract from Paragon Initiative Enterprises.
All versions of halite with dependencies
ext-json Version *
paragonie/constant_time_encoding Version ^2|^3
paragonie/hidden-string Version ^1|^2
paragonie/sodium_compat Version ^1|^2