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sql.go
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sql.go
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package sql
import (
"crypto/sha256"
"database/sql"
"encoding/hex"
"fmt"
"log"
"strings"
"time"
jwt "github.com/dgrijalva/jwt-go"
"github.com/isi-nc/autentigo/api"
"github.com/isi-nc/autentigo/auth"
_ "github.com/lib/pq"
)
// User describe an user stored in db
type User struct {
Id string
PasswordHash string `json:"password_hash"`
auth.ExtraClaims
}
type sqlAuth struct {
db *sql.DB
table string
}
// New Authenticator with no backend
func New(driver, dsn, table string) api.Authenticator {
db, err := sql.Open(driver, dsn)
if err != nil {
panic(err)
}
// try to connect
if err := db.Ping(); err != nil {
panic(err)
}
log.Println("Connected to the database...")
return &sqlAuth{
db: db,
table: table,
}
}
var _ api.Authenticator = sqlAuth{}
func (sa sqlAuth) Authenticate(user, password string, expiresAt time.Time) (claims jwt.Claims, err error) {
ba := sha256.Sum256([]byte(password))
passwordHash := hex.EncodeToString(ba[:])
u := User{}
groups := ""
query := fmt.Sprintf("select id, password_hash, display_name, email, email_verified, groups from %s where id=$1;", sa.table)
err = sa.db.
QueryRow(query, user).
Scan(&u.Id, &u.PasswordHash, &u.DisplayName, &u.Email, &u.EmailVerified, &groups)
if err != nil {
if err == sql.ErrNoRows {
log.Printf("User %s not found", user)
err = api.ErrInvalidAuthentication
return
}
return
}
u.Groups = strings.Split(groups, ",")
if u.PasswordHash != passwordHash {
err = api.ErrInvalidAuthentication
return
}
claims = auth.Claims{
StandardClaims: jwt.StandardClaims{
IssuedAt: time.Now().Unix(),
ExpiresAt: expiresAt.Unix(),
Subject: user,
},
ExtraClaims: u.ExtraClaims,
}
return
}