1# Go JOSE
2
3[](https://godoc.org/gopkg.in/square/go-jose.v1)
4[](https://godoc.org/gopkg.in/square/go-jose.v2)
5[](https://raw.githubusercontent.com/square/go-jose/master/LICENSE)
6[](https://travis-ci.org/square/go-jose)
7[](https://coveralls.io/r/square/go-jose)
8
9Package jose aims to provide an implementation of the Javascript Object Signing
10and Encryption set of standards. This includes support for JSON Web Encryption,
11JSON Web Signature, and JSON Web Token standards.
12
13**Disclaimer**: This library contains encryption software that is subject to
14the U.S. Export Administration Regulations. You may not export, re-export,
15transfer or download this code or any part of it in violation of any United
16States law, directive or regulation. In particular this software may not be
17exported or re-exported in any form or on any media to Iran, North Sudan,
18Syria, Cuba, or North Korea, or to denied persons or entities mentioned on any
19US maintained blocked list.
20
21## Overview
22
23The implementation follows the
24[JSON Web Encryption](http://dx.doi.org/10.17487/RFC7516) (RFC 7516),
25[JSON Web Signature](http://dx.doi.org/10.17487/RFC7515) (RFC 7515), and
26[JSON Web Token](http://dx.doi.org/10.17487/RFC7519) (RFC 7519).
27Tables of supported algorithms are shown below. The library supports both
28the compact and full serialization formats, and has optional support for
29multiple recipients. It also comes with a small command-line utility
30([`jose-util`](https://github.com/square/go-jose/tree/v2/jose-util))
31for dealing with JOSE messages in a shell.
32
33**Note**: We use a forked version of the `encoding/json` package from the Go
34standard library which uses case-sensitive matching for member names (instead
35of [case-insensitive matching](https://www.ietf.org/mail-archive/web/json/current/msg03763.html)).
36This is to avoid differences in interpretation of messages between go-jose and
37libraries in other languages.
38
39### Versions
40
41We use [gopkg.in](https://gopkg.in) for versioning.
42
43[Version 2](https://gopkg.in/square/go-jose.v2)
44([branch](https://github.com/square/go-jose/tree/v2),
45[doc](https://godoc.org/gopkg.in/square/go-jose.v2)) is the current version:
46
47 import "gopkg.in/square/go-jose.v2"
48
49The old `v1` branch ([go-jose.v1](https://gopkg.in/square/go-jose.v1)) will
50still receive backported bug fixes and security fixes, but otherwise
51development is frozen. All new feature development takes place on the `v2`
52branch. Version 2 also contains additional sub-packages such as the
53[jwt](https://godoc.org/gopkg.in/square/go-jose.v2/jwt) implementation
54contributed by [@shaxbee](https://github.com/shaxbee).
55
56### Supported algorithms
57
58See below for a table of supported algorithms. Algorithm identifiers match
59the names in the [JSON Web Algorithms](http://dx.doi.org/10.17487/RFC7518)
60standard where possible. The Godoc reference has a list of constants.
61
62 Key encryption | Algorithm identifier(s)
63 :------------------------- | :------------------------------
64 RSA-PKCS#1v1.5 | RSA1_5
65 RSA-OAEP | RSA-OAEP, RSA-OAEP-256
66 AES key wrap | A128KW, A192KW, A256KW
67 AES-GCM key wrap | A128GCMKW, A192GCMKW, A256GCMKW
68 ECDH-ES + AES key wrap | ECDH-ES+A128KW, ECDH-ES+A192KW, ECDH-ES+A256KW
69 ECDH-ES (direct) | ECDH-ES<sup>1</sup>
70 Direct encryption | dir<sup>1</sup>
71
72<sup>1. Not supported in multi-recipient mode</sup>
73
74 Signing / MAC | Algorithm identifier(s)
75 :------------------------- | :------------------------------
76 RSASSA-PKCS#1v1.5 | RS256, RS384, RS512
77 RSASSA-PSS | PS256, PS384, PS512
78 HMAC | HS256, HS384, HS512
79 ECDSA | ES256, ES384, ES512
80 Ed25519 | EdDSA<sup>2</sup>
81
82<sup>2. Only available in version 2 of the package</sup>
83
84 Content encryption | Algorithm identifier(s)
85 :------------------------- | :------------------------------
86 AES-CBC+HMAC | A128CBC-HS256, A192CBC-HS384, A256CBC-HS512
87 AES-GCM | A128GCM, A192GCM, A256GCM
88
89 Compression | Algorithm identifiers(s)
90 :------------------------- | -------------------------------
91 DEFLATE (RFC 1951) | DEF
92
93### Supported key types
94
95See below for a table of supported key types. These are understood by the
96library, and can be passed to corresponding functions such as `NewEncrypter` or
97`NewSigner`. Each of these keys can also be wrapped in a JWK if desired, which
98allows attaching a key id.
99
100 Algorithm(s) | Corresponding types
101 :------------------------- | -------------------------------
102 RSA | *[rsa.PublicKey](http://golang.org/pkg/crypto/rsa/#PublicKey), *[rsa.PrivateKey](http://golang.org/pkg/crypto/rsa/#PrivateKey)
103 ECDH, ECDSA | *[ecdsa.PublicKey](http://golang.org/pkg/crypto/ecdsa/#PublicKey), *[ecdsa.PrivateKey](http://golang.org/pkg/crypto/ecdsa/#PrivateKey)
104 EdDSA<sup>1</sup> | [ed25519.PublicKey](https://godoc.org/golang.org/x/crypto/ed25519#PublicKey), [ed25519.PrivateKey](https://godoc.org/golang.org/x/crypto/ed25519#PrivateKey)
105 AES, HMAC | []byte
106
107<sup>1. Only available in version 2 of the package</sup>
108
109## Examples
110
111[](https://godoc.org/gopkg.in/square/go-jose.v1)
112[](https://godoc.org/gopkg.in/square/go-jose.v2)
113
114Examples can be found in the Godoc
115reference for this package. The
116[`jose-util`](https://github.com/square/go-jose/tree/v2/jose-util)
117subdirectory also contains a small command-line utility which might be useful
118as an example.
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