tinkjwt

package module
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 Go to latest Published: Apr 22, 2024 License: Apache-2.0 Imports: 20 Imported by: 0

README

golang-jwt for Tink Keys

go-jwt extension for use with Tink Cryptographic Library.

You can use this library to sign and verify a JWT using the standard go-jwt library semantics while the private and public keys are Tink Keysets

Note: Tink already has support for JWT signature and verification using its built-in JWT Token but this library allows you to easily use the more common JWT library in golang.

this repo is not supported by google

Supported Key Types

The following types are supported

  • RS256
  • PS256
  • ES256
Supported TINK Key Types:

Currently only the PrimaryKeyID is used for signing and verification which means if you pass a keyset handle in, and the JWT to issue or verify is not the primary one, you need to rotate the keyID as primary.

The Tink Key you use for signing should use the TINK or RAW prefix mode ("outputPrefixType": "RAW", "outputPrefixType": "TINK") as shown in the example.

Additional JWT signing library:

IMPORTANT: this library will only sign and verify using the primary key in the keyset

Usage

To use, just initialize the library and provide it with a Tink KeyHandle:

For signing with RSA keys:

import (
	jwt "github.com/golang-jwt/jwt/v5"
	"github.com/tink-crypto/tink-go/v2/insecurecleartextkeyset"
	"github.com/tink-crypto/tink-go/v2/keyset"

	tinkjwt "github.com/salrashid123/golang-jwt-tink"
)

// read a keyset (i'm using raw, insecure keyset but you can use any)
// the key here is type.googleapis.com/google.crypto.tink.RsaSsaPkcs1PrivateKey
privReader := keyset.NewJSONReader(bytes.NewReader(privKBytes))
privateKeyHandle, err := insecurecleartextkeyset.Read(privReader)

// if you intend to sign with a non primary key, first set it to the primary
//prMgr := keyset.NewManagerFromHandle(privateKeyHandle)
//prMgr.SetPrimary(uint32(*keyID))

// create the claims you want to sign
claims := &jwt.RegisteredClaims{
	ExpiresAt: &jwt.NumericDate{time.Now().Add(time.Minute * 1)},
	Issuer:    "test",
}

// initialize the signer
tinkjwt.SigningMethodTINKRS256.Override()

token := jwt.NewWithClaims(tinkjwt.SigningMethodTINKRS256, claims)

config := &tinkjwt.TINKConfig{
	Key: privateKeyHandle,
}
keyctx, err := tinkjwt.NewTINKContext(ctx, config)

// sign
tokenString, err := token.SignedString(keyctx)
fmt.Printf("TOKEN: %s\n", tokenString)

To verify, you can just use the Public Key

// read in the public key
// "type.googleapis.com/google.crypto.tink.RsaSsaPkcs1PublicKey"
publicKeyReader := keyset.NewJSONReader(bytes.NewReader(pubKBytes))
publicKeyHandle, err := insecurecleartextkeyset.Read(publicKeyReader)

// if you want to verify a jwt signed by a non-primary key, set it here
//puMgr := keyset.NewManagerFromHandle(publicKeyHandle)
//puMgr.SetPrimary(uint32(*keyID))

config := &tinkjwt.TINKConfig{
	Key: publicKeyHandle,
}

keyctx, err := tinkjwt.NewTINKContext(ctx, config)

// verify with TINK based publicKey
keyFunc, err := tinkjwt.TINKVerfiyKeyfunc(keyctx, config)

tokenP, err := jwt.Parse(tokenString, keyFunc)
if tokenP.Valid {
	log.Println("     verified with TINK PublicKey")
}

See the example/ folder for end-to-end examples

RSA

Sign and Verify

## sign with default primary key
$ go run rsa/main.go  --privK keyset/rsa_2_privatekey_keyset.json --pubK=keyset/rsa_2_public_keyset.json 

		2024/04/18 13:40:26 ======= Init  ========
		2024/04/18 13:40:26 RSA PublicKey: 
		-----BEGIN RSA PUBLIC KEY-----
		MIIBojANBgkqhkiG9w0BAQEFAAOCAY8AMIIBigKCAYEA2du3+AUj75Sfd0GR/faj
		jacdCEsSqYphLbqDQwknwZLzp44cy4D5s3Mt/2QHHIXcvts9DRYVJOpGctg5VDwJ
		7sBNAPZ9h6J4QW6X5lV7TMa1T+jJwlCg56MCQqxayP+EgOCwk4rV8ZPZH/l0a5nV
		eDZZ3mtrlnxGJ5WCnvjMuT8PxJ4SsDFbPzByphDUMGB4Idieka/arQ9p8efbADO4
		6bQUyv97UW7t8pqb49RnX2b2Xl3878UdulIPymsrr4t05rahh8a7daEB6YLK0tF/
		tTvuK0SYMVZMyLb9VsipeGBePRsMvUKt8f9rwhLmQImAcuDYwfkiGAO9bA/VjxNA
		Z/8klBTw6XdL6uR/RrbCXUYeOPvL4XposPHgNu5EDMF4aga5e7jops6iB9O5Ih3h
		cQd+OETUFsLC7J4QXIeunV5LSOPw33BkgqNxVeFNQeNujPAUSCmO7PmwgVfx75TT
		FQMWdLcJgga/G11hOoKT+zuyF1cVClurqxfFKYUlmKBHAgMBAAE=
		-----END RSA PUBLIC KEY-----

		TOKEN: eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJ0ZXN0IiwiZXhwIjoxNzEzNDYyMDg2fQ.iLu-Ke_seOSkReDN_pj0VlcWSMltOyfYqLq9BmsOlgWTWa8xJkR0yQhnKZhqL4-KImKM_u33t1Yx6bHI7es2cnJALPuwCqDHr_8jIygk1I1I6b8tm6B8F6u3nmjQiTPstD9LqJfK6yIuu5fE1AqgIcgFvZp5uYeJQJcg5f3Rg71FQcCSbCJA2rddwWgyxlt-b8XMM46-ATRAmP_Lzng9kLOCXIPCcjhoNkNEq0w2NROjaLNYZ1LtsT7CMHU_5T9U2eRxJWlesZSkPcI9dr3BNlOIgUFqp-Q7KeSTltN9wa1uAc4QzjxEfQnit4oMLb89Bn-Vj66cy_SGuO7Sk528QCJZeNeTtKh9IIzu_4JBfoGzzVT1dk_8_2mlSxLgFsyd4EZZIlpPmXpegc5a_OSzZXbG6rpc-gXeNrlB0u4DYWKvO2sLUraCoe46iQaVw_ld2nuQ44PBPCJxKwEmoIs1BXg0GK7x7zm2ln-3dePSu4Xl0hnaX7diw3PFFvGc6jxC
		2024/04/18 13:40:26      verified with TINK PublicKey
		2024/04/18 13:40:26      verified with exported PubicKey
		2024/04/18 13:40:26      verified with TINK PublicKey


## sign with other named keys
$ go run rsa/main.go --keyID=2174348416 --privK keyset/rsa_2_privatekey_keyset.json --pubK=keyset/rsa_2_public_keyset.json 

		2024/04/18 13:41:31 ======= Init  ========
		2024/04/18 13:41:31 RSA PublicKey: 
		-----BEGIN RSA PUBLIC KEY-----
		MIIBojANBgkqhkiG9w0BAQEFAAOCAY8AMIIBigKCAYEAkdWeGM94Z+QosZ5UpXSe
		aT/OF3JFJSrvCl8c9dIcL3l7itTzFQkTyMsJ+i91J2jDF7Apj+z9WowrGgcw74Zb
		M56UGql1JbV+TA8Rjv6gtGg/EdGGKJkWrqID72huEaRzyvlxlE1aM2BrScaNvcFs
		CffkrERAi53yhEO/QWZpi02DaRiE0IXd3R2wesckAkYs95xKRLIJ4ID3jf5lDHNC
		q39AdVSy9x2iTZJNwPCAoLLcLNsWEzy2QkvXXdpRyvyWtgEB/de40YT7cppeoPDt
		/5bXSY1HDRfrH9LB77iWdTgfBro8Jqtg+0Bqh3TID4lTSGMeScU5fbsjzkhGlaEi
		5LefA2k+AJnKwdXPaSSRMhRN4Z3u8b3uxjhSnV1ATv9DTJE9kGc4/9SVqOnXBE3e
		OUaoRR1Ax2WXbVBehlb63OqotWbCLzJSeNKBjtrqKo3E53clqZEkcdPu9bCGG0gj
		M5o8aheFU4sP2hItOMHNuIuucG3GWRLA45RZj15FNaFvAgMBAAE=
		-----END RSA PUBLIC KEY-----

		TOKEN: eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJ0ZXN0IiwiZXhwIjoxNzEzNDYyMTUxfQ.Zntc0unwXnHYZfDIMZRn3damSJSdmtXuafpfCzYjeKP3IHSbkSvsnv1zTVq2aWayDuafoHECEqZMe_zbCPWiwsgK2_0GmawyI3WCzGfiH9UkdoSCOMyGtg9Ci0M-IXmRH5rHpJU_4LaGIz6PDg4DeHceRxdJntIGqTkxf_fLX9zAR-FALnaWyWX_S_ePMHfb8R248fiQQAt_9bjn04Ye-A7lGsTSVO-HZKJQKqIvy6jLNXEzUBvxvdOqnSBsgn5WuEfzgM5eirehwBebNALPGgNY9WDEjAfiahfrWmB1BYs-EIwKFIZj6HNQLaEol6iR4CDh2avEhTkuw5FSXtkL1DYLcRC8XkcmtdmCjtEEfofura2hpnGu89M3i0g3gmKVxWG8hRDs7cwfmpvIpZ8i9EIQlO-YUi51lc-pv3nUlVBW3FEVXoHWIs7_bC_gk4n6I-UA2asO5CmGkIfUpP6KefiAqozyHvzYWGVHHbR7whmoRaWXR_a_dpXuv9keSv2K
		2024/04/18 13:41:31      verified with TINK PublicKey
		2024/04/18 13:41:31      verified with exported PubicKey
		2024/04/18 13:41:31      verified with TINK PublicKey
ECC

Sign and verify

$ go run ecc/main.go  --privK keyset/ecc_1_privatekey_keyset.json --pubK=keyset/ecc_1_public_keyset.json 

		2024/04/18 13:42:19 ======= Init  ========
		2024/04/18 13:42:19 ECC PublicKey: 
		-----BEGIN PUBLIC KEY-----
		MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEGOLxcX/cPer+YNwY8MIK68QUT6r6
		XbnUaE5GXGGlqP2hEyHG29u0buqlHr9uY77jOVmCzWATfjTefMW5aRDyZw==
		-----END PUBLIC KEY-----

		TOKEN: eyJhbGciOiJFUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJ0ZXN0IiwiZXhwIjoxNzEzNDYyMTk5fQ.0ViPNc2fUa10WhTfgfY7w1bDhBiUhxGoGBVW6Ox6nffiWQzerQjy92mpF_H1YIzkJoJlQenEtTI_SQf442UEMw
		2024/04/18 13:42:19      verified with TINK PublicKey
		2024/04/18 13:42:19      verified with exported PubicKey
		2024/04/18 13:42:19      verified with TINK PublicKey
Keyset

This library uses the primary key in a keyset for sign and verify steps.

The example folder contains some pre-generated keysets where the rsa keyset has two valid keys.

These keys were created using the following tinkey commands:

$ tinkey list-key-templates

## RSA
$ tinkey create-keyset --key-template=RSA_SSA_PKCS1_3072_SHA256_F4 --out-format=json --out=keyset/rsa_1_privatekey_keyset.json
$ tinkey create-public-keyset --in=keyset/rsa_1_privatekey_keyset.json --out-format=json --out=keyset/rsa_1_public_keyset.json


$ tinkey list-keyset --in=keyset/rsa_1_privatekey_keyset.json

primary_key_id: 2174348416
key_info {
  type_url: "type.googleapis.com/google.crypto.tink.RsaSsaPkcs1PrivateKey"
  status: ENABLED
  key_id: 2174348416
  output_prefix_type: TINK
}


$ tinkey list-keyset --in=keyset/rsa_1_public_keyset.json

primary_key_id: 2174348416
key_info {
  type_url: "type.googleapis.com/google.crypto.tink.RsaSsaPkcs1PublicKey"
  status: ENABLED
  key_id: 2174348416
  output_prefix_type: TINK
}

$ tinkey rotate-keyset --key-template=RSA_SSA_PKCS1_3072_SHA256_F4 --in-format=json \
  --in=keyset/rsa_1_privatekey_keyset.json --out-format=json --out=keyset/rsa_1_privatekey_keyset.json

$ tinkey create-public-keyset --in=keyset/rsa_2_privatekey_keyset.json --out-format=json --out=keyset/rsa_2_public_keyset.json

$ tinkey list-keyset --in=keyset/rsa_2_privatekey_keyset.json

primary_key_id: 123569881
key_info {
  type_url: "type.googleapis.com/google.crypto.tink.RsaSsaPkcs1PrivateKey"
  status: ENABLED
  key_id: 2174348416
  output_prefix_type: TINK
}
key_info {
  type_url: "type.googleapis.com/google.crypto.tink.RsaSsaPkcs1PrivateKey"
  status: ENABLED
  key_id: 123569881
  output_prefix_type: TINK
}

$ tinkey list-keyset --in=keyset/rsa_2_public_keyset.json

primary_key_id: 123569881
key_info {
  type_url: "type.googleapis.com/google.crypto.tink.RsaSsaPkcs1PublicKey"
  status: ENABLED
  key_id: 2174348416
  output_prefix_type: TINK
}
key_info {
  type_url: "type.googleapis.com/google.crypto.tink.RsaSsaPkcs1PublicKey"
  status: ENABLED
  key_id: 123569881
  output_prefix_type: TINK
}

### ECC

$ tinkey create-keyset --key-template=ECDSA_P256 --out-format=json --out=keyset/ecc_1_privatekey_keyset.json
$ tinkey create-public-keyset --in=keyset/ecc_1_privatekey_keyset.json --out-format=json --out=keyset/ecc_1_public_keyset.json

$ tinkey create-keyset --key-template=ECDSA_P256_IEEE_P1363_WITHOUT_PREFIX --out-format=json --out=keyset/ecc_2_privatekey_keyset.json
$ tinkey create-public-keyset --in=keyset/ecc_2_privatekey_keyset.json --out-format=json --out=keyset/ecc_2_public_keyset.json

Documentation

Index

Constants

View Source 
const (

	// https://github.com/google/tink/blob/master/go/core/cryptofmt/cryptofmt.go#L68
	// NonRawPrefixSize is the prefix size of Tink and Legacy key types.
	NonRawPrefixSize = 5

	// TinkPrefixSize is the prefix size of Tink key types.
	// The prefix starts with \x01 and followed by a 4-byte key id.
	TinkPrefixSize = NonRawPrefixSize
	// TinkStartByte is the first byte of the prefix of Tink key types.
	TinkStartByte = byte(1)

	// RawPrefixSize is the prefix size of Raw key types.
	// Raw prefix is empty.
	RawPrefixSize = 0
	// RawPrefix is the empty prefix of Raw key types.
	RawPrefix = ""
)

Variables

This section is empty.

Functions

func NewTINKContext 

func NewTINKContext(parent context.Context, val *TINKConfig) (context.Context, error)

func TINKVerfiyKeyfunc 

func TINKVerfiyKeyfunc(ctx context.Context, config *TINKConfig) (jwt.Keyfunc, error)

Types

type SigningMethodTINK 

type SigningMethodTINK struct {
	// contains filtered or unexported fields
}
var (
	SigningMethodTINKRS256 *SigningMethodTINK
	SigningMethodTINKPS256 *SigningMethodTINK
	SigningMethodTINKES256 *SigningMethodTINK
)

func (*SigningMethodTINK) Alg 

func (s *SigningMethodTINK) Alg() string

Alg will return the JWT header algorithm identifier this method is configured for.

func (*SigningMethodTINK) Hash 

func (s *SigningMethodTINK) Hash() crypto.Hash

func (*SigningMethodTINK) Override 

func (s *SigningMethodTINK) Override()

Override will override the default JWT implementation of the signing function this Cloud KMS type implements.

func (*SigningMethodTINK) Sign 

func (s *SigningMethodTINK) Sign(signingString string, key interface{}) ([]byte, error)

func (*SigningMethodTINK) Verify 

func (s *SigningMethodTINK) Verify(signingString string, signature []byte, key interface{}) error

type TINKConfig 

type TINKConfig struct {
	Key   *keyset.Handle
	KeyID string // (optional) the keyID (eg, specify the 'kid' parameter; if not set, use the TINK primary keyID)
	// contains filtered or unexported fields
}

func TINKFromContext 

func TINKFromContext(ctx context.Context) (*TINKConfig, bool)

func (*TINKConfig) GetKeyID 

func (k *TINKConfig) GetKeyID() string

func (*TINKConfig) GetPublicKey 

func (k *TINKConfig) GetPublicKey() crypto.PublicKey

Source Files

View all Source files

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