mirror of
https://github.com/woodpecker-ci/woodpecker.git
synced 2024-11-27 12:21:03 +00:00
131 lines
2.9 KiB
Go
131 lines
2.9 KiB
Go
package token
|
|
|
|
import (
|
|
"fmt"
|
|
"net/http"
|
|
|
|
"github.com/dgrijalva/jwt-go"
|
|
)
|
|
|
|
type SecretFunc func(*Token) (string, error)
|
|
|
|
const (
|
|
UserToken = "user"
|
|
SessToken = "sess"
|
|
HookToken = "hook"
|
|
CsrfToken = "csrf"
|
|
AgentToken = "agent"
|
|
)
|
|
|
|
// Default algorithm used to sign JWT tokens.
|
|
const SignerAlgo = "HS256"
|
|
|
|
type Token struct {
|
|
Kind string
|
|
Text string
|
|
}
|
|
|
|
func Parse(raw string, fn SecretFunc) (*Token, error) {
|
|
token := &Token{}
|
|
parsed, err := jwt.Parse(raw, keyFunc(token, fn))
|
|
if err != nil {
|
|
return nil, err
|
|
} else if !parsed.Valid {
|
|
return nil, jwt.ValidationError{}
|
|
}
|
|
return token, nil
|
|
}
|
|
|
|
func ParseRequest(r *http.Request, fn SecretFunc) (*Token, error) {
|
|
var token = r.Header.Get("Authorization")
|
|
|
|
// first we attempt to get the token from the
|
|
// authorization header.
|
|
if len(token) != 0 {
|
|
token = r.Header.Get("Authorization")
|
|
fmt.Sscanf(token, "Bearer %s", &token)
|
|
return Parse(token, fn)
|
|
}
|
|
|
|
// then we attempt to get the token from the
|
|
// access_token url query parameter
|
|
token = r.FormValue("access_token")
|
|
if len(token) != 0 {
|
|
return Parse(token, fn)
|
|
}
|
|
|
|
// and finally we attempt to get the token from
|
|
// the user session cookie
|
|
cookie, err := r.Cookie("user_sess")
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return Parse(cookie.Value, fn)
|
|
}
|
|
|
|
func CheckCsrf(r *http.Request, fn SecretFunc) error {
|
|
|
|
// get and options requests are always
|
|
// enabled, without CSRF checks.
|
|
switch r.Method {
|
|
case "GET", "OPTIONS":
|
|
return nil
|
|
}
|
|
|
|
// parse the raw CSRF token value and validate
|
|
raw := r.Header.Get("X-CSRF-TOKEN")
|
|
_, err := Parse(raw, fn)
|
|
return err
|
|
}
|
|
|
|
func New(kind, text string) *Token {
|
|
return &Token{Kind: kind, Text: text}
|
|
}
|
|
|
|
// Sign signs the token using the given secret hash
|
|
// and returns the string value.
|
|
func (t *Token) Sign(secret string) (string, error) {
|
|
return t.SignExpires(secret, 0)
|
|
}
|
|
|
|
// Sign signs the token using the given secret hash
|
|
// with an expiration date.
|
|
func (t *Token) SignExpires(secret string, exp int64) (string, error) {
|
|
token := jwt.New(jwt.SigningMethodHS256)
|
|
token.Claims["type"] = t.Kind
|
|
token.Claims["text"] = t.Text
|
|
if exp > 0 {
|
|
token.Claims["exp"] = float64(exp)
|
|
}
|
|
return token.SignedString([]byte(secret))
|
|
}
|
|
|
|
func keyFunc(token *Token, fn SecretFunc) jwt.Keyfunc {
|
|
return func(t *jwt.Token) (interface{}, error) {
|
|
// validate the correct algorithm is being used
|
|
if t.Method.Alg() != SignerAlgo {
|
|
return nil, jwt.ErrSignatureInvalid
|
|
}
|
|
|
|
// extract the token kind and cast to
|
|
// the expected type.
|
|
kindv, ok := t.Claims["type"]
|
|
if !ok {
|
|
return nil, jwt.ValidationError{}
|
|
}
|
|
token.Kind, _ = kindv.(string)
|
|
|
|
// extract the token value and cast to
|
|
// exepected type.
|
|
textv, ok := t.Claims["text"]
|
|
if !ok {
|
|
return nil, jwt.ValidationError{}
|
|
}
|
|
token.Text, _ = textv.(string)
|
|
|
|
// invoke the callback function to retrieve
|
|
// the secret key used to verify
|
|
secret, err := fn(token)
|
|
return []byte(secret), err
|
|
}
|
|
}
|