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Replace HMAC with ED25519 in examples #310

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Replace HMAC with ED25519 in examples #310

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579f2a6
Replace hmac with ed25519 in examples
G1gg1L3s Apr 22, 2023
41b019d
Make the linter happy
G1gg1L3s May 15, 2023
820b58f
Return old hmac examples to the hmac_example_test
G1gg1L3s Jun 4, 2023
7473f0f
Merge branch 'main' into use-ed25519-in-examples
G1gg1L3s Jun 30, 2023
4f045b1
Remove empty line
G1gg1L3s Aug 10, 2023
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91 changes: 72 additions & 19 deletions example_test.go
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Original file line number Diff line number Diff line change
@@ -1,6 +1,8 @@
package jwt_test

import (
"crypto/ed25519"
"encoding/hex"
"errors"
"fmt"
"time"
Expand All @@ -14,24 +16,46 @@ import (
// no way to retrieve other fields after parsing.
// See the CustomClaimsType example for intended usage.
func ExampleNewWithClaims_registeredClaims() {
mySigningKey := []byte("AllYourBase")
publicKey, privateKey, err := ed25519.GenerateKey(nil)
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I wonder whether we should load one of the keys from the test repository instead of generating one. This would probably be a bit more "realistic". Hopefully people will understand to load their own key instead of using the one in the test folder then.

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I saw that other tests load the key from the filesystem, so here I decided to show that they can also be generated if needed. At least it's secure and useful for quick prototypying.

if err != nil {
panic(err)
}

// Create the Claims
claims := &jwt.RegisteredClaims{
ExpiresAt: jwt.NewNumericDate(time.Unix(1516239022, 0)),
ExpiresAt: jwt.NewNumericDate(time.Unix(2516239022, 0)),
Issuer: "test",
}

token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
ss, err := token.SignedString(mySigningKey)
fmt.Printf("%v %v", ss, err)
// Output: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJ0ZXN0IiwiZXhwIjoxNTE2MjM5MDIyfQ.0XN_1Tpp9FszFOonIBpwha0c_SfnNI22DhTnjMshPg8 <nil>
token := jwt.NewWithClaims(jwt.SigningMethodEdDSA, claims)
ss, err := token.SignedString(privateKey)
if err != nil {
panic(err)
}

// Validate the token
tk, err := jwt.ParseWithClaims(ss, claims, func(t *jwt.Token) (interface{}, error) {
return publicKey, nil
})

if err != nil {
panic(err)
}

issuer, err := tk.Claims.GetIssuer()
fmt.Printf("%v %v", issuer, err)

//Output: test <nil>
}

// Example creating a token using a custom claims type. The RegisteredClaims is embedded
// in the custom type to allow for easy encoding, parsing and validation of registered claims.
func ExampleNewWithClaims_customClaimsType() {
mySigningKey := []byte("AllYourBase")
_, privateKey, err := ed25519.GenerateKey(nil)

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if err != nil {
panic(err)
}

type MyCustomClaims struct {
Foo string `json:"foo"`
Expand Down Expand Up @@ -65,26 +89,34 @@ func ExampleNewWithClaims_customClaimsType() {
},
}

token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
ss, err := token.SignedString(mySigningKey)
fmt.Printf("%v %v", ss, err)
token := jwt.NewWithClaims(jwt.SigningMethodEdDSA, claims)
ss, err := token.SignedString(privateKey)

fmt.Println(len(ss), err)

// Output: foo: bar
// eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJmb28iOiJiYXIiLCJpc3MiOiJ0ZXN0IiwiZXhwIjoxNTE2MjM5MDIyfQ.xVuY2FZ_MRXMIEgVQ7J-TFtaucVFRXUzHm9LmV41goM <nil>
// 182 <nil>
}

// Example creating a token using a custom claims type. The RegisteredClaims is embedded
// in the custom type to allow for easy encoding, parsing and validation of standard claims.
func ExampleParseWithClaims_customClaimsType() {
tokenString := "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJmb28iOiJiYXIiLCJpc3MiOiJ0ZXN0IiwiYXVkIjoic2luZ2xlIn0.QAWg1vGvnqRuCFTMcPkjZljXHh8U3L_qUjszOtQbeaA"
tokenString := "eyJhbGciOiJFZERTQSIsInR5cCI6IkpXVCJ9.eyJmb28iOiJiYXIiLCJpc3MiOiJ0ZXN0IiwiZXhwIjoyNTE2MjM5MDIyfQ.JutXls8z2IUxAtUgCV2Ec7WRVKrTYX5gCByB0mGLJw0qC9xah3YwH9E82U3QZAPQOOXAalhEFP92KYEWAyITDw"

// Corresponding private key is a426d77a4edabfdef2830223c9e94e68c5ba1006d1d7ba2a8277ada9b3f93d5c9939cf856f57ee490076a5cc0104b7ae7d458be275cd1cc6fb91b509413e7f56
publicKeyBytes, err := hex.DecodeString("9939cf856f57ee490076a5cc0104b7ae7d458be275cd1cc6fb91b509413e7f56")
if err != nil {
panic(err)
}
publicKey := ed25519.PublicKey(publicKeyBytes)

type MyCustomClaims struct {
Foo string `json:"foo"`
jwt.RegisteredClaims
}

token, err := jwt.ParseWithClaims(tokenString, &MyCustomClaims{}, func(token *jwt.Token) (interface{}, error) {
return []byte("AllYourBase"), nil
return publicKey, nil
})

if claims, ok := token.Claims.(*MyCustomClaims); ok && token.Valid {
Expand All @@ -99,15 +131,22 @@ func ExampleParseWithClaims_customClaimsType() {
// Example creating a token using a custom claims type and validation options. The RegisteredClaims is embedded
// in the custom type to allow for easy encoding, parsing and validation of standard claims.
func ExampleParseWithClaims_validationOptions() {
tokenString := "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJmb28iOiJiYXIiLCJpc3MiOiJ0ZXN0IiwiYXVkIjoic2luZ2xlIn0.QAWg1vGvnqRuCFTMcPkjZljXHh8U3L_qUjszOtQbeaA"
tokenString := "eyJhbGciOiJFZERTQSIsInR5cCI6IkpXVCJ9.eyJmb28iOiJiYXIiLCJpc3MiOiJ0ZXN0IiwiZXhwIjoyNTE2MjM5MDIyfQ.JutXls8z2IUxAtUgCV2Ec7WRVKrTYX5gCByB0mGLJw0qC9xah3YwH9E82U3QZAPQOOXAalhEFP92KYEWAyITDw"

// Corresponding private key is a426d77a4edabfdef2830223c9e94e68c5ba1006d1d7ba2a8277ada9b3f93d5c9939cf856f57ee490076a5cc0104b7ae7d458be275cd1cc6fb91b509413e7f56
publicKeyBytes, err := hex.DecodeString("9939cf856f57ee490076a5cc0104b7ae7d458be275cd1cc6fb91b509413e7f56")
if err != nil {
panic(err)
}
publicKey := ed25519.PublicKey(publicKeyBytes)

type MyCustomClaims struct {
Foo string `json:"foo"`
jwt.RegisteredClaims
}

token, err := jwt.ParseWithClaims(tokenString, &MyCustomClaims{}, func(token *jwt.Token) (interface{}, error) {
return []byte("AllYourBase"), nil
return publicKey, nil
}, jwt.WithLeeway(5*time.Second))

if claims, ok := token.Claims.(*MyCustomClaims); ok && token.Valid {
Expand Down Expand Up @@ -139,10 +178,17 @@ func (m MyCustomClaims) Validate() error {
// encoding, parsing and validation of standard claims and the function
// CustomValidation is implemented.
func ExampleParseWithClaims_customValidation() {
tokenString := "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJmb28iOiJiYXIiLCJpc3MiOiJ0ZXN0IiwiYXVkIjoic2luZ2xlIn0.QAWg1vGvnqRuCFTMcPkjZljXHh8U3L_qUjszOtQbeaA"
tokenString := "eyJhbGciOiJFZERTQSIsInR5cCI6IkpXVCJ9.eyJmb28iOiJiYXIiLCJpc3MiOiJ0ZXN0IiwiZXhwIjoyNTE2MjM5MDIyfQ.JutXls8z2IUxAtUgCV2Ec7WRVKrTYX5gCByB0mGLJw0qC9xah3YwH9E82U3QZAPQOOXAalhEFP92KYEWAyITDw"

// Corresponding private key is a426d77a4edabfdef2830223c9e94e68c5ba1006d1d7ba2a8277ada9b3f93d5c9939cf856f57ee490076a5cc0104b7ae7d458be275cd1cc6fb91b509413e7f56
publicKeyBytes, err := hex.DecodeString("9939cf856f57ee490076a5cc0104b7ae7d458be275cd1cc6fb91b509413e7f56")
if err != nil {
panic(err)
}
publicKey := ed25519.PublicKey(publicKeyBytes)

token, err := jwt.ParseWithClaims(tokenString, &MyCustomClaims{}, func(token *jwt.Token) (interface{}, error) {
return []byte("AllYourBase"), nil
return publicKey, nil
}, jwt.WithLeeway(5*time.Second))

if claims, ok := token.Claims.(*MyCustomClaims); ok && token.Valid {
Expand All @@ -157,10 +203,17 @@ func ExampleParseWithClaims_customValidation() {
// An example of parsing the error types using errors.Is.
func ExampleParse_errorChecking() {
// Token from another example. This token is expired
var tokenString = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJmb28iOiJiYXIiLCJleHAiOjE1MDAwLCJpc3MiOiJ0ZXN0In0.HE7fK0xOQwFEr4WDgRWj4teRPZ6i3GLwD5YCm6Pwu_c"
var tokenString = "eyJhbGciOiJFZERTQSIsInR5cCI6IkpXVCJ9.eyJmb28iOiJiYXIiLCJpc3MiOiJ0ZXN0IiwiZXhwIjoxNTE2MjM5MDIyfQ.XAxYEk_6fWzMe256fXeT-eDR1vo_t4gqkq3eD4lqKHm8VrvhnOBtIrfXAJvMY6S1c5Lb1CIhPAaCe366xsYJDg"

// Corresponding private key is 378446363ffa1eb526a61f4b250bd24bd60002d5d20e22fa9b20c786e7f5e2ea8fff42935411c4c9bd3772c4a96a710bf6f2ba5508a71fc6155bcd73eb952837
publicKeyBytes, err := hex.DecodeString("8fff42935411c4c9bd3772c4a96a710bf6f2ba5508a71fc6155bcd73eb952837")
if err != nil {
panic(err)
}
publicKey := ed25519.PublicKey(publicKeyBytes)

token, err := jwt.Parse(tokenString, func(token *jwt.Token) (interface{}, error) {
return []byte("AllYourBase"), nil
return publicKey, nil
})

if token.Valid {
Expand Down
127 changes: 127 additions & 0 deletions hmac_example_test.go
View file
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
package jwt_test

import (
"errors"
"fmt"
"os"
"time"
Expand Down Expand Up @@ -65,3 +66,129 @@ func ExampleParse_hmac() {

// Output: bar 1.4444784e+09
}

// Example creating a token using a custom claims type. The RegisteredClaims is embedded
// in the custom type to allow for easy encoding, parsing and validation of registered claims.
func ExampleNewWithClaims_customClaimsTypeHmac() {
mySigningKey := []byte("AllYourBase")

type SomeCustomClaims struct {
Foo string `json:"foo"`
jwt.RegisteredClaims
}

// Create claims with multiple fields populated
claims := SomeCustomClaims{
"bar",
jwt.RegisteredClaims{
// A usual scenario is to set the expiration time relative to the current time
ExpiresAt: jwt.NewNumericDate(time.Now().Add(24 * time.Hour)),
IssuedAt: jwt.NewNumericDate(time.Now()),
NotBefore: jwt.NewNumericDate(time.Now()),
Issuer: "test",
Subject: "somebody",
ID: "1",
Audience: []string{"somebody_else"},
},
}

fmt.Printf("foo: %v\n", claims.Foo)

// Create claims while leaving out some of the optional fields
claims = SomeCustomClaims{
"bar",
jwt.RegisteredClaims{
// Also fixed dates can be used for the NumericDate
ExpiresAt: jwt.NewNumericDate(time.Unix(1516239022, 0)),
Issuer: "test",
},
}

token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
ss, err := token.SignedString(mySigningKey)
fmt.Printf("%v %v", ss, err)

//Output: foo: bar
//eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJmb28iOiJiYXIiLCJpc3MiOiJ0ZXN0IiwiZXhwIjoxNTE2MjM5MDIyfQ.xVuY2FZ_MRXMIEgVQ7J-TFtaucVFRXUzHm9LmV41goM <nil>
}

// Example creating a token using a custom claims type. The RegisteredClaims is embedded
// in the custom type to allow for easy encoding, parsing and validation of standard claims.
func ExampleParseWithClaims_customClaimsTypeHmac() {
tokenString := "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJmb28iOiJiYXIiLCJpc3MiOiJ0ZXN0IiwiYXVkIjoic2luZ2xlIn0.QAWg1vGvnqRuCFTMcPkjZljXHh8U3L_qUjszOtQbeaA"

type SomeCustomClaims struct {
Foo string `json:"foo"`
jwt.RegisteredClaims
}

token, err := jwt.ParseWithClaims(tokenString, &SomeCustomClaims{}, func(token *jwt.Token) (interface{}, error) {
return []byte("AllYourBase"), nil
})

if claims, ok := token.Claims.(*SomeCustomClaims); ok && token.Valid {
fmt.Printf("%v %v", claims.Foo, claims.RegisteredClaims.Issuer)
} else {
fmt.Println(err)
}

// Output: bar test
}

// Example creating a token using a custom claims type and validation options. The RegisteredClaims is embedded
// in the custom type to allow for easy encoding, parsing and validation of standard claims.
func ExampleParseWithClaims_validationOptionsHmac() {
tokenString := "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJmb28iOiJiYXIiLCJpc3MiOiJ0ZXN0IiwiYXVkIjoic2luZ2xlIn0.QAWg1vGvnqRuCFTMcPkjZljXHh8U3L_qUjszOtQbeaA"

type SomeCustomClaims struct {
Foo string `json:"foo"`
jwt.RegisteredClaims
}

token, err := jwt.ParseWithClaims(tokenString, &SomeCustomClaims{}, func(token *jwt.Token) (interface{}, error) {
return []byte("AllYourBase"), nil
}, jwt.WithLeeway(5*time.Second))

if claims, ok := token.Claims.(*SomeCustomClaims); ok && token.Valid {
fmt.Printf("%v %v", claims.Foo, claims.RegisteredClaims.Issuer)
} else {
fmt.Println(err)
}

// Output: bar test
}

type SomeCustomClaims struct {
Foo string `json:"foo"`
jwt.RegisteredClaims
}

// Validate can be used to execute additional application-specific claims
// validation.
func (m SomeCustomClaims) Validate() error {
if m.Foo != "bar" {
return errors.New("must be foobar")
}

return nil
}

// Example creating a token using a custom claims type and validation options.
// The RegisteredClaims is embedded in the custom type to allow for easy
// encoding, parsing and validation of standard claims and the function
// CustomValidation is implemented.
func ExampleParseWithClaims_customValidationHmac() {
tokenString := "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJmb28iOiJiYXIiLCJpc3MiOiJ0ZXN0IiwiYXVkIjoic2luZ2xlIn0.QAWg1vGvnqRuCFTMcPkjZljXHh8U3L_qUjszOtQbeaA"

token, err := jwt.ParseWithClaims(tokenString, &SomeCustomClaims{}, func(token *jwt.Token) (interface{}, error) {
return []byte("AllYourBase"), nil
}, jwt.WithLeeway(5*time.Second))

if claims, ok := token.Claims.(*SomeCustomClaims); ok && token.Valid {
fmt.Printf("%v %v", claims.Foo, claims.RegisteredClaims.Issuer)
} else {
fmt.Println(err)
}

// Output: bar test
}