How to go from JWK to accessing claims in tokens provided by my IDP in Go?












0















I'm having a lot of trouble going from a well-known.json url to getting the claims and using them internally.



My biggest issue right now is parsing the JWK from a well-known json string to a public key to verify my tokens with.



import (
"fmt"

"github.com/dgrijalva/jwt-go"
"github.com/lestrrat-go/jwx/jwk"
)

func main() {
// I have a JWK that contains a key encoded using RS256
set, _ := jwk.ParseString(jwkString)

// This doesn't return a public key
// Is this the right way to get a public key back from the string?
publicKey, _ := set.Keys[0].Materialize()

token, _ := jwt.Parse("<token string>", func(*jwt.Token) (interface{}, error) {
return byte(publicKey), nil
})

// Do I have to manually cast the claims to typed variables for use?
email := fmt.Sprint(token.Claims.(jwt.MapClaims)["email"])


fmt.Println("email " + email)
}










share|improve this question

























  • What libraries are jwk and jwt? (Can you add import statements to your example?)

    – David Maze
    Nov 24 '18 at 12:50











  • @DavidMaze added - though feel free to suggest better alternatives.

    – David Alsh
    Nov 24 '18 at 12:51











  • Oh wow, it actually already works! I think I am getting confused about what I am expecting as a return result from .Materialze()

    – David Alsh
    Nov 24 '18 at 12:53


















0















I'm having a lot of trouble going from a well-known.json url to getting the claims and using them internally.



My biggest issue right now is parsing the JWK from a well-known json string to a public key to verify my tokens with.



import (
"fmt"

"github.com/dgrijalva/jwt-go"
"github.com/lestrrat-go/jwx/jwk"
)

func main() {
// I have a JWK that contains a key encoded using RS256
set, _ := jwk.ParseString(jwkString)

// This doesn't return a public key
// Is this the right way to get a public key back from the string?
publicKey, _ := set.Keys[0].Materialize()

token, _ := jwt.Parse("<token string>", func(*jwt.Token) (interface{}, error) {
return byte(publicKey), nil
})

// Do I have to manually cast the claims to typed variables for use?
email := fmt.Sprint(token.Claims.(jwt.MapClaims)["email"])


fmt.Println("email " + email)
}










share|improve this question

























  • What libraries are jwk and jwt? (Can you add import statements to your example?)

    – David Maze
    Nov 24 '18 at 12:50











  • @DavidMaze added - though feel free to suggest better alternatives.

    – David Alsh
    Nov 24 '18 at 12:51











  • Oh wow, it actually already works! I think I am getting confused about what I am expecting as a return result from .Materialze()

    – David Alsh
    Nov 24 '18 at 12:53
















0












0








0








I'm having a lot of trouble going from a well-known.json url to getting the claims and using them internally.



My biggest issue right now is parsing the JWK from a well-known json string to a public key to verify my tokens with.



import (
"fmt"

"github.com/dgrijalva/jwt-go"
"github.com/lestrrat-go/jwx/jwk"
)

func main() {
// I have a JWK that contains a key encoded using RS256
set, _ := jwk.ParseString(jwkString)

// This doesn't return a public key
// Is this the right way to get a public key back from the string?
publicKey, _ := set.Keys[0].Materialize()

token, _ := jwt.Parse("<token string>", func(*jwt.Token) (interface{}, error) {
return byte(publicKey), nil
})

// Do I have to manually cast the claims to typed variables for use?
email := fmt.Sprint(token.Claims.(jwt.MapClaims)["email"])


fmt.Println("email " + email)
}










share|improve this question
















I'm having a lot of trouble going from a well-known.json url to getting the claims and using them internally.



My biggest issue right now is parsing the JWK from a well-known json string to a public key to verify my tokens with.



import (
"fmt"

"github.com/dgrijalva/jwt-go"
"github.com/lestrrat-go/jwx/jwk"
)

func main() {
// I have a JWK that contains a key encoded using RS256
set, _ := jwk.ParseString(jwkString)

// This doesn't return a public key
// Is this the right way to get a public key back from the string?
publicKey, _ := set.Keys[0].Materialize()

token, _ := jwt.Parse("<token string>", func(*jwt.Token) (interface{}, error) {
return byte(publicKey), nil
})

// Do I have to manually cast the claims to typed variables for use?
email := fmt.Sprint(token.Claims.(jwt.MapClaims)["email"])


fmt.Println("email " + email)
}







go






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 24 '18 at 12:50







David Alsh

















asked Nov 24 '18 at 12:44









David AlshDavid Alsh

9211918




9211918













  • What libraries are jwk and jwt? (Can you add import statements to your example?)

    – David Maze
    Nov 24 '18 at 12:50











  • @DavidMaze added - though feel free to suggest better alternatives.

    – David Alsh
    Nov 24 '18 at 12:51











  • Oh wow, it actually already works! I think I am getting confused about what I am expecting as a return result from .Materialze()

    – David Alsh
    Nov 24 '18 at 12:53





















  • What libraries are jwk and jwt? (Can you add import statements to your example?)

    – David Maze
    Nov 24 '18 at 12:50











  • @DavidMaze added - though feel free to suggest better alternatives.

    – David Alsh
    Nov 24 '18 at 12:51











  • Oh wow, it actually already works! I think I am getting confused about what I am expecting as a return result from .Materialze()

    – David Alsh
    Nov 24 '18 at 12:53



















What libraries are jwk and jwt? (Can you add import statements to your example?)

– David Maze
Nov 24 '18 at 12:50





What libraries are jwk and jwt? (Can you add import statements to your example?)

– David Maze
Nov 24 '18 at 12:50













@DavidMaze added - though feel free to suggest better alternatives.

– David Alsh
Nov 24 '18 at 12:51





@DavidMaze added - though feel free to suggest better alternatives.

– David Alsh
Nov 24 '18 at 12:51













Oh wow, it actually already works! I think I am getting confused about what I am expecting as a return result from .Materialze()

– David Alsh
Nov 24 '18 at 12:53







Oh wow, it actually already works! I think I am getting confused about what I am expecting as a return result from .Materialze()

– David Alsh
Nov 24 '18 at 12:53














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