telebit/mplexer/mgmt/authstore/authstore.go

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package authstore
import (
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"crypto/rand"
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"crypto/sha256"
"encoding/base64"
"errors"
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"time"
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jwt "github.com/dgrijalva/jwt-go"
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)
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var ErrExists = errors.New("token already exists")
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type Authorization struct {
ID string `db:"id,omitempty" json:"-"`
MachinePPID string `db:"machine_ppid,omitempty" json:"machine_ppid,omitempty"`
PublicKey string `db:"public_key,omitempty" json:"public_key,omitempty"`
SharedKey string `db:"shared_key,omitempty" json:"shared_key"`
Slug string `db:"slug,omitempty" json:"slug"`
CreatedAt time.Time `db:"created_at,omitempty" json:"created_at,omitempty"`
UpdatedAt time.Time `db:"updated_at,omitempty" json:"updated_at,omitempty"`
DeletedAt time.Time `db:"deleted_at,omitempty" json:"-"`
}
type Store interface {
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SetMaster(secret string) error
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Add(auth *Authorization) error
Set(auth *Authorization) error
Active() ([]Authorization, error)
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Inactive() ([]Authorization, error)
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Touch(id string) error
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Get(id string) (*Authorization, error)
GetBySlug(id string) (*Authorization, error)
GetByPub(id string) (*Authorization, error)
Delete(auth *Authorization) error
Close() error
}
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func ToPublicKeyString(secret string) string {
pubBytes := sha256.Sum256([]byte(secret))
pub := base64.RawURLEncoding.EncodeToString(pubBytes[:])
if len(pub) > 24 {
pub = pub[:24]
}
return pub
}
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func HMACToken(secret string) (token string, err error) {
keyID := ToPublicKeyString(secret)
b := make([]byte, 16)
_, _ = rand.Read(b)
claims := &jwt.StandardClaims{
Id: base64.RawURLEncoding.EncodeToString(b),
IssuedAt: time.Now().Unix(),
ExpiresAt: time.Now().Add(5 * time.Minute).Unix(),
}
jwtToken := &jwt.Token{
Header: map[string]interface{}{
"kid": keyID,
"typ": "JWT",
"alg": jwt.SigningMethodHS256.Alg(),
},
Claims: claims,
Method: jwt.SigningMethodHS256,
}
if token, err = jwtToken.SignedString([]byte(secret)); err != nil {
return "", err
}
return token, nil
}