92 lines
2.3 KiB
Go
92 lines
2.3 KiB
Go
package utils
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import (
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"encoding/json"
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"nCovTrack-Backend/global"
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"nCovTrack-Backend/models"
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"time"
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"github.com/gin-gonic/gin"
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"github.com/golang-jwt/jwt/v4"
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)
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var JWT_KEY = []byte(global.ServerSettings.Jwt.Secret)
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// GenerateToken Generate token for user
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// Return: token generated
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func GenerateToken(claims jwt.MapClaims) string {
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claims["exp"] = time.Now().Add(15 * 24 * time.Hour).Unix()
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claims["iat"] = time.Now().Unix()
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token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
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tokenStr, err := token.SignedString(JWT_KEY)
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if err != nil {
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panic(err)
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}
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return tokenStr
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}
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// RenewToken Renew user's token
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// tokenStr: user request token
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// Return:
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// BlankString: token is invalid or token is expired out of allowed time;
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// OldToken: token is not need to renew;
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// NewToken: token is renew;
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func RenewToken(tokenStr string) string {
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token, err := jwt.Parse(tokenStr, func(t *jwt.Token) (interface{}, error) {
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return JWT_KEY, nil
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})
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// Token is invalid
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if err != nil {
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switch err.(*jwt.ValidationError).Errors {
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case jwt.ValidationErrorSignatureInvalid:
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return ""
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case jwt.ValidationErrorIssuedAt:
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return ""
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}
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}
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claims := token.Claims.(jwt.MapClaims)
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expireAt := time.Unix(int64(claims["exp"].(float64)), 0)
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expireDuration := expireAt.Sub(time.Now())
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// Token is out of allow expire duration
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if expireDuration.Hours() < -float64(global.ServerSettings.Jwt.RenewExpireDays*24) {
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return ""
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}
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// Token not need renew
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if expireDuration.Hours() > float64(global.ServerSettings.Jwt.RenewAheadDays*24) {
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return tokenStr
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}
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//fmt.Println(expireDuration)
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claims["exp"] = time.Now().Add(global.TOKEN_EXPIRE_DAYS * 24 * time.Hour).Unix()
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token = jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
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tokenStr, err = token.SignedString(JWT_KEY)
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if err != nil {
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panic(err)
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}
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return tokenStr
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}
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func ParseClaims(tokenStr string) jwt.MapClaims {
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token, err := jwt.Parse(tokenStr, func(t *jwt.Token) (interface{}, error) {
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return JWT_KEY, nil
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})
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if err != nil {
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switch err.(*jwt.ValidationError).Errors {
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case jwt.ValidationErrorSignatureInvalid:
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return nil
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case jwt.ValidationErrorIssuedAt:
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return nil
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}
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}
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return token.Claims.(jwt.MapClaims)
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}
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func ClaimsFromHeader(c *gin.Context) models.TokenClaims {
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var claims models.TokenClaims
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json.Unmarshal([]byte(c.Request.Header.Get("claims")), &claims)
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return claims
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}
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