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# Go JOSE
**Please note that this branch is still under active development.**
[![godoc](http://img.shields.io/badge/godoc-reference-blue.svg?style=flat)](https://godoc.org/gopkg.in/square/go-jose.v2)
[![license](http://img.shields.io/badge/license-apache_2.0-red.svg?style=flat)](https://raw.githubusercontent.com/square/go-jose/master/LICENSE)
[![build](https://img.shields.io/travis/square/go-jose.svg?style=flat)](https://travis-ci.org/square/go-jose)
[![coverage](https://img.shields.io/coveralls/square/go-jose.svg?style=flat)](https://coveralls.io/r/square/go-jose)
[![report card](https://goreportcard.com/badge/github.com/square/go-jose)](https://goreportcard.com/report/github.com/square/go-jose)
[![godoc](http://img.shields.io/badge/godoc-version_1-blue.svg?style=flat)](https://godoc.org/gopkg.in/square/go-jose.v1)
[![godoc](http://img.shields.io/badge/godoc-version_2-blue.svg?style=flat)](https://godoc.org/gopkg.in/square/go-jose.v2)
[![license](http://img.shields.io/badge/license-apache_2.0-blue.svg?style=flat)](https://raw.githubusercontent.com/square/go-jose/master/LICENSE)
[![build](https://travis-ci.org/square/go-jose.svg?branch=master)](https://travis-ci.org/square/go-jose)
[![coverage](https://coveralls.io/repos/github/square/go-jose/badge.svg?branch=master)](https://coveralls.io/r/square/go-jose)
Package jose aims to provide an implementation of the Javascript Object Signing
and Encryption set of standards. For the moment, it mainly focuses on encryption
and signing based on the JSON Web Encryption and JSON Web Signature standards.
and Encryption set of standards. This includes support for JSON Web Encryption,
JSON Web Signature, and JSON Web Token standards.
**Disclaimer**: This library contains encryption software that is subject to
the U.S. Export Administration Regulations. You may not export, re-export,
@@ -23,44 +21,50 @@ US maintained blocked list.
## Overview
The implementation follows the
[JSON Web Encryption](http://dx.doi.org/10.17487/RFC7516)
standard (RFC 7516) and
[JSON Web Signature](http://dx.doi.org/10.17487/RFC7515)
standard (RFC 7515). Tables of supported algorithms are shown below.
The library supports both the compact and full serialization formats, and has
optional support for multiple recipients. It also comes with a small
command-line utility
([`jose-util`](https://github.com/square/go-jose/tree/master/jose-util))
[JSON Web Encryption](http://dx.doi.org/10.17487/RFC7516) (RFC 7516),
[JSON Web Signature](http://dx.doi.org/10.17487/RFC7515) (RFC 7515), and
[JSON Web Token](http://dx.doi.org/10.17487/RFC7519) (RFC 7519).
Tables of supported algorithms are shown below. The library supports both
the compact and full serialization formats, and has optional support for
multiple recipients. It also comes with a small command-line utility
([`jose-util`](https://github.com/square/go-jose/tree/v2/jose-util))
for dealing with JOSE messages in a shell.
**Note**: We use a forked version of the `encoding/json` package from the Go
standard library which uses case-sensitive matching for member names (instead
of [case-insensitive matching](https://www.ietf.org/mail-archive/web/json/current/msg03763.html)).
This is to avoid differences in interpretation of messages between go-jose and
libraries in other languages. If you do not like this behavior, you can use the
`std_json` build tag to disable it (though we do not recommend doing so).
libraries in other languages.
### Versions
We use [gopkg.in](https://gopkg.in) for versioning.
[Version 1](https://gopkg.in/square/go-jose.v1) is the current stable version:
[Version 1](https://gopkg.in/square/go-jose.v1) is the old stable version:
import "gopkg.in/square/go-jose.v1"
[Version 2](https://gopkg.in/square/go-jose.v2) is for new development:
import "gopkg.in/square/go-jose.v2"
The interface for [go-jose.v1](https://gopkg.in/square/go-jose.v1) will remain
backwards compatible. We're currently sketching out ideas for a new version, to
clean up the interface a bit. If you have ideas or feature requests [please let
us know](https://github.com/square/go-jose/issues/64)!
backwards compatible. No new feature development will take place on the `v1` branch,
however bug fixes and security fixes will be backported.
The interface for [go-jose.v2](https://gopkg.in/square/go-jose.v2) is mostly
stable, but we suggest pinning to a particular revision for now as we still reserve
the right to make changes. New feature development happens on this branch.
New in [go-jose.v2](https://gopkg.in/square/go-jose.v2) is a
[jwt](https://godoc.org/gopkg.in/square/go-jose.v2/jwt) sub-package
contributed by [@shaxbee](https://github.com/shaxbee).
### Supported algorithms
See below for a table of supported algorithms. Algorithm identifiers match
the names in the
[JSON Web Algorithms](http://dx.doi.org/10.17487/RFC7518)
standard where possible. The
[Godoc reference](https://godoc.org/github.com/square/go-jose#pkg-constants)
has a list of constants.
the names in the [JSON Web Algorithms](http://dx.doi.org/10.17487/RFC7518)
standard where possible. The Godoc reference has a list of constants.
Key encryption | Algorithm identifier(s)
:------------------------- | :------------------------------
@@ -94,122 +98,22 @@ has a list of constants.
See below for a table of supported key types. These are understood by the
library, and can be passed to corresponding functions such as `NewEncrypter` or
`NewSigner`. Note that if you are creating a new encrypter or signer with a
JSONWebKey, the key id of the JSONWebKey (if present) will be added to any
resulting messages.
`NewSigner`. Each of these keys can also be wrapped in a JWK if desired, which
allows attaching a key id.
Algorithm(s) | Corresponding types
:------------------------- | -------------------------------
RSA | *[rsa.PublicKey](http://golang.org/pkg/crypto/rsa/#PublicKey), *[rsa.PrivateKey](http://golang.org/pkg/crypto/rsa/#PrivateKey), *[jose.JSONWebKey](https://godoc.org/gopkg.in/square/go-jose.v2#JSONWebKey)
ECDH, ECDSA | *[ecdsa.PublicKey](http://golang.org/pkg/crypto/ecdsa/#PublicKey), *[ecdsa.PrivateKey](http://golang.org/pkg/crypto/ecdsa/#PrivateKey), *[jose.JSONWebKey](https://godoc.org/gopkg.in/square/go-jose.v2#JSONWebKey)
AES, HMAC | []byte, *[jose.JSONWebKey](https://godoc.org/gopkg.in/square/go-jose.v2#JSONWebKey)
RSA | *[rsa.PublicKey](http://golang.org/pkg/crypto/rsa/#PublicKey), *[rsa.PrivateKey](http://golang.org/pkg/crypto/rsa/#PrivateKey)
ECDH, ECDSA | *[ecdsa.PublicKey](http://golang.org/pkg/crypto/ecdsa/#PublicKey), *[ecdsa.PrivateKey](http://golang.org/pkg/crypto/ecdsa/#PrivateKey)
AES, HMAC | []byte
## Examples
Encryption/decryption example using RSA:
[![godoc](http://img.shields.io/badge/godoc-version_1-blue.svg?style=flat)](https://godoc.org/gopkg.in/square/go-jose.v1)
[![godoc](http://img.shields.io/badge/godoc-version_2-blue.svg?style=flat)](https://godoc.org/gopkg.in/square/go-jose.v2)
```Go
// Generate a public/private key pair to use for this example. The library
// also provides two utility functions (LoadPublicKey and LoadPrivateKey)
// that can be used to load keys from PEM/DER-encoded data.
privateKey, err := rsa.GenerateKey(rand.Reader, 2048)
if err != nil {
panic(err)
}
// Instantiate an encrypter using RSA-OAEP with AES128-GCM. An error would
// indicate that the selected algorithm(s) are not currently supported.
publicKey := &privateKey.PublicKey
encrypter, err := NewEncrypter(A128GCM, Recipient{Algorithm: RSA_OAEP, Key: publicKey}, nil)
if err != nil {
panic(err)
}
// Encrypt a sample plaintext. Calling the encrypter returns an encrypted
// JWE object, which can then be serialized for output afterwards. An error
// would indicate a problem in an underlying cryptographic primitive.
var plaintext = []byte("Lorem ipsum dolor sit amet")
object, err := encrypter.Encrypt(plaintext)
if err != nil {
panic(err)
}
// Serialize the encrypted object using the full serialization format.
// Alternatively you can also use the compact format here by calling
// object.CompactSerialize() instead.
serialized := object.FullSerialize()
// Parse the serialized, encrypted JWE object. An error would indicate that
// the given input did not represent a valid message.
object, err = ParseEncrypted(serialized)
if err != nil {
panic(err)
}
// Now we can decrypt and get back our original plaintext. An error here
// would indicate the the message failed to decrypt, e.g. because the auth
// tag was broken or the message was tampered with.
decrypted, err := object.Decrypt(privateKey)
if err != nil {
panic(err)
}
fmt.Printf(string(decrypted))
// output: Lorem ipsum dolor sit amet
```
Signing/verification example using RSA:
```Go
// Generate a public/private key pair to use for this example. The library
// also provides two utility functions (LoadPublicKey and LoadPrivateKey)
// that can be used to load keys from PEM/DER-encoded data.
privateKey, err := rsa.GenerateKey(rand.Reader, 2048)
if err != nil {
panic(err)
}
// Instantiate a signer using RSASSA-PSS (SHA512) with the given private key.
signer, err := NewSigner(SigningKey{Algorithm: PS512, Key: privateKey}, nil)
if err != nil {
panic(err)
}
// Sign a sample payload. Calling the signer returns a protected JWS object,
// which can then be serialized for output afterwards. An error would
// indicate a problem in an underlying cryptographic primitive.
var payload = []byte("Lorem ipsum dolor sit amet")
object, err := signer.Sign(payload)
if err != nil {
panic(err)
}
// Serialize the encrypted object using the full serialization format.
// Alternatively you can also use the compact format here by calling
// object.CompactSerialize() instead.
serialized := object.FullSerialize()
// Parse the serialized, protected JWS object. An error would indicate that
// the given input did not represent a valid message.
object, err = ParseSigned(serialized)
if err != nil {
panic(err)
}
// Now we can verify the signature on the payload. An error here would
// indicate the the message failed to verify, e.g. because the signature was
// broken or the message was tampered with.
output, err := object.Verify(&privateKey.PublicKey)
if err != nil {
panic(err)
}
fmt.Printf(string(output))
// output: Lorem ipsum dolor sit amet
```
More examples can be found in the [Godoc
reference](https://godoc.org/github.com/square/go-jose) for this package. The
[`jose-util`](https://github.com/square/go-jose/tree/master/jose-util)
subdirectory also contains a small command-line utility which might
be useful as an example.
Examples can be found in the Godoc
reference for this package. The
[`jose-util`](https://github.com/square/go-jose/tree/v2/jose-util)
subdirectory also contains a small command-line utility which might be useful
as an example.