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// Copyright (c) 2015-2025 MinIO, Inc.
//
// # This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package oidc
import (
"encoding/base64"
"errors"
"time"
"github.com/golang-jwt/jwt/v4"
"github.com/minio/minio-go/v7/pkg/credentials"
)
// CLILoginClaims holds the claims for CLI login tokens.
type CLILoginClaims struct {
c *cliLoginClaims
}
type cliLoginClaims struct {
Port int `json:"port"`
ReqID string `json:"req_id"`
Expiry time.Time `json:"expiry"`
}
// NewCLILoginClaims creates a new CLILoginClaims with the given port and request ID.
func NewCLILoginClaims(port int, reqID string) *CLILoginClaims {
return &CLILoginClaims{
c: &cliLoginClaims{
Port: port,
ReqID: reqID,
Expiry: time.Now().UTC().Add(5 * time.Minute),
},
}
}
// ParseCLILoginClaims parses a base64-encoded JWT token string and returns the CLILoginClaims if valid.
func ParseCLILoginClaims(tokenString, secret string) (*CLILoginClaims, error) {
decodedToken, err := base64.RawURLEncoding.DecodeString(tokenString)
if err != nil {
return nil, err
}
claims := &cliLoginClaims{}
_, err = jwt.ParseWithClaims(string(decodedToken), claims, func(_ *jwt.Token) (any, error) {
return []byte(secret), nil
})
if err != nil {
return nil, err
}
return &CLILoginClaims{c: claims}, nil
}
func (c *cliLoginClaims) Valid() error {
if time.Now().UTC().After(c.Expiry) {
return errors.New("token is expired")
}
return nil
}
// Port returns the port from the CLI login claims.
func (c *CLILoginClaims) Port() int {
return c.c.Port
}
// ToTokenString serializes the CLILoginClaims to a base64-encoded JWT token string signed with the given secret.
func (c *CLILoginClaims) ToTokenString(secret string) (string, error) {
token := jwt.NewWithClaims(jwt.SigningMethodHS512, c.c)
sString, err := token.SignedString([]byte(secret))
if err != nil {
return "", err
}
return base64.RawURLEncoding.EncodeToString([]byte(sString)), nil
}
// SignCredentials signs the given credentials using the request ID as the secret and returns a base64-encoded JWT token string.
func (c *CLILoginClaims) SignCredentials(creds credentials.Value) (string, error) {
claims := &credentialsClaims{
AccessKeyID: creds.AccessKeyID,
SecretAccessKey: creds.SecretAccessKey,
SessionToken: creds.SessionToken,
Expiration: creds.Expiration,
}
token := jwt.NewWithClaims(jwt.SigningMethodHS512, claims)
sString, err := token.SignedString([]byte(c.c.ReqID))
if err != nil {
return "", err
}
return base64.RawURLEncoding.EncodeToString([]byte(sString)), nil
}
type credentialsClaims struct {
AccessKeyID string `json:"access_key_id"`
SecretAccessKey string `json:"secret_access_key"`
SessionToken string `json:"session_token,omitempty"`
Expiration time.Time `json:"expiration,omitempty"`
}
func (c *credentialsClaims) Valid() error {
if !c.Expiration.IsZero() && time.Now().UTC().After(c.Expiration) {
return errors.New("credentials token is expired")
}
return nil
}
// ParseSignedCredentials parses a base64-encoded JWT token string and returns the credentials Value if valid.
func ParseSignedCredentials(tokenString, reqID string) (credentials.Value, error) {
decodedToken, err := base64.RawURLEncoding.DecodeString(tokenString)
if err != nil {
return credentials.Value{}, err
}
claims := &credentialsClaims{}
_, err = jwt.ParseWithClaims(string(decodedToken), claims, func(_ *jwt.Token) (any, error) {
return []byte(reqID), nil
})
if err != nil {
return credentials.Value{}, err
}
return credentials.Value{
AccessKeyID: claims.AccessKeyID,
SecretAccessKey: claims.SecretAccessKey,
SessionToken: claims.SessionToken,
Expiration: claims.Expiration,
}, nil
}
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