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/*
* Copyright 2021 Lightbend Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package kalix.scalasdk
import java.time.Instant
import spray.json.{ JsArray, JsBoolean, JsNumber, JsObject, JsString, JsValue, JsonParser }
/**
* Representation of JWT claims that have been validated and extracted from the bearer token of a request.
*/
trait JwtClaims {
/**
* Returns the names of all the claims in this request.
*
* @return
* The names of all the claims in this request.
*/
def allClaimNames: Iterable[String]
/**
* Returns all the claims as a map of strings to strings.
*
* If the claim is a String claim, the value will be the raw String. For all other types, it will be the value of the
* claim encoded to JSON.
*
* @return
* All the claims represented as a map of string claim names to string values.
*/
def asMap: Map[String, String]
/**
* Does this request have any claims that have been validated?
*
* @return
* true if there are claims.
*/
def hasClaims: Boolean = allClaimNames.iterator.hasNext
/**
* Get the issuer, that is, the `iss` claim, as described in RFC 7519 section 4.1.1.
*
* @return
* the issuer, if present.
* @see
* [[https://datatracker.ietf.org/doc/html/rfc7519#section-4.1.1 RFC 7519 section 4.1.1]]
*/
def issuer: Option[String] = getString("iss")
/**
* Get the subject, that is, the `sub` claim, as described in RFC 7519 section 4.1.2.
*
* @return
* the subject, if present.
* @see
* [[https://datatracker.ietf.org/doc/html/rfc7519#section-4.1.2 RFC 7519 section 4.1.2]]
*/
def subject: Option[String] = getString("sub")
/**
* Get the audience, that is, the `aud` claim, as described in RFC 7519 section 4.1.3.
*
* @return
* the audience, if present.
* @see
* [[https://datatracker.ietf.org/doc/html/rfc7519#section-4.1.3 RFC 7519 section 4.1.3]]
*/
def audience: Option[String] = getString("aud")
/**
* Get the expiration time, that is, the `exp` claim, as described in RFC 7519 section 4.1.4.
*
* @return
* the expiration time, if present. Returns [[None]] if the value is not a numeric date.
* @see
* [[https://datatracker.ietf.org/doc/html/rfc7519#section-4.1.4 RFC 7519 section 4.1.4]]
*/
def expirationTime: Option[Instant] = getNumericDate("exp")
/**
* Get the not before, that is, the `nbf` claim, as described in RFC 7519 section 4.1.5.
*
* @return
* the not before, if present. Returns [[None]] if the value is not a numeric date.
* @see
* [[https://datatracker.ietf.org/doc/html/rfc7519#section-4.1.5 RFC 7519 section 4.1.5]]
*/
def notBefore: Option[Instant] = getNumericDate("nbf")
/**
* Get the issued at, that is, the `iat` claim, as described in RFC 7519 section 4.1.6.
*
* @return
* the issued at, if present. Returns [[None]] if the value is not a numeric date.
* @see
* [[https://datatracker.ietf.org/doc/html/rfc7519#section-4.1.6 RFC 7519 section 4.1.6]]
*/
def issuedAt: Option[Instant] = getNumericDate("iat")
/**
* Get the JWT ID, that is, the `jti` claim, as described in RFC 7519 section 4.1.7.
*
* @return
* the JWT ID, if present.
* @see
* [[https://datatracker.ietf.org/doc/html/rfc7519#section-4.1.7 RFC 7519 section 4.1.7]]
*/
def jwtId: Option[String] = getString("jti")
/**
* Get the string claim with the given name.
*
* Note that if the claim with the given name is not a string claim, this will return the JSON encoding of it.
*
* @param name
* The name of the claim.
* @return
* The string claim, if present.
*/
def getString(name: String): Option[String]
/**
* Get the int claim with the given name.
*
* @param name
* The name of the claim.
* @return
* The integer claim, if present. Returns [[None]] if the claim is not an int or can't be parsed as an int.
*/
def getInt(name: String): Option[Int] = getNumber(name, _.toInt)
/**
* Get the long claim with the given name.
*
* @param name
* The name of the claim.
* @return
* The long claim, if present. Returns [[None]] if the claim is not a long or can't be parsed as an long.
*/
def getLong(name: String): Option[Long] = getNumber(name, _.toLong)
/**
* Get the double claim with the given name.
*
* @param name
* The name of the claim.
* @return
* The double claim, if present. Returns [[None]] if the claim is not a double or can't be parsed as an double.
*/
def getDouble(name: String): Option[Double] = getNumber(name, _.toDouble)
/**
* Get the boolean claim with the given name.
*
* @param name
* The name of the claim.
* @return
* The boolean claim, if present. Returns [[None]] if the claim is not a boolean or can't be parsed as a boolean.
*/
def getBoolean(name: String): Option[Boolean] = getString(name).flatMap {
case t if t.equalsIgnoreCase("true") => Some(true)
case f if f.equalsIgnoreCase("false") => Some(false)
case _ => None
}
/**
* Get the numeric data claim with the given name.
*
* Numeric dates are expressed as a number of seconds since epoch, as described in RFC 7519 section 2.
*
* @param name
* The name of the claim.
* @return
* The numeric date claim, if present. Returns [[None]] if the claim is not a numeric date or can't be parsed as a
* numeric date.
* @see
* [[https://datatracker.ietf.org/doc/html/rfc7519#section-2 RFC 7519 section 2]]
*/
def getNumericDate(name: String): Option[Instant] = getLong(name).map(Instant.ofEpochSecond)
/**
* Get the object claim with the given name.
*
* This returns the claim as a Spray JsObject.
*
* @param name
* The name of the claim.
* @return
* The object claim, if present. Returns [[None]] if the claim is not an object or can't be parsed as an object.
*/
def getObject(name: String): Option[JsObject] = getString(name).flatMap(value =>
try JsonParser(value) match {
case obj: JsObject => Some(obj)
case _ => None
} catch {
case _: JsonParser.ParsingException => None
})
/**
* Get the string list claim with the given name.
*
* @param name
* The name of the claim.
* @return
* The string list claim, if present. Returns [[None]] if the claim is not a JSON array of strings or cannot be
* parsed as a JSON array of strings.
*/
def getStringList(name: String): Option[Seq[String]] = getArray(name, { case JsString(value) => value })
/**
* Get the integer list claim with the given name.
*
* @param name
* The name of the claim.
* @return
* The integer list claim, if present. Returns [[None]] if the claim is not a JSON array of integers or cannot be
* parsed as a JSON array of integers.
*/
def getIntegerList(name: String): Option[Seq[Int]] =
getArray(name, { case JsNumber(value) if value.isValidInt => value.toInt })
/**
* Get the long list claim with the given name.
*
* @param name
* The name of the claim.
* @return
* The long list claim, if present. Returns [[None]] if the claim is not a JSON array of longs or cannot be parsed
* as a JSON array of longs.
*/
def getLongList(name: String): Option[Seq[Long]] =
getArray(name, { case JsNumber(value) if value.isValidLong => value.toLong })
/**
* Get the double list claim with the given name.
*
* @param name
* The name of the claim.
* @return
* The double list claim, if present. Returns [[None]] if the claim is not a JSON array of doubles or cannot be
* parsed as a JSON array of doubles.
*/
def getDoubleList(name: String): Option[Seq[Double]] = getArray(name, { case JsNumber(value) => value.toDouble })
/**
* Get the boolean list claim with the given name.
*
* @param name
* The name of the claim.
* @return
* The boolean list claim, if present. Returns [[None]] if the claim is not a JSON array of booleans or cannot be
* parsed as a JSON array of booleans.
*/
def getBooleanList(name: String): Option[Seq[Boolean]] = getArray(name, { case JsBoolean(value) => value })
/**
* Get the numeric date list claim with the given name.
*
* @param name
* The name of the claim.
* @return
* The numeric date list claim, if present. Returns [[None]] if the claim is not a JSON array of numeric dates or
* cannot be parsed as a JSON array of numeric dates.
*/
def getNumericDateList(name: String): Option[Seq[Instant]] = getLongList(name).map(_.map(Instant.ofEpochSecond))
/**
* Get the object list claim with the given name.
*
* @param name
* The name of the claim.
* @return
* The object list claim, if present. Returns [[None]] if the claim is not a JSON array of objects or cannot be
* parsed as a JSON array of objects.
*/
def getObjectList(name: String): Option[Seq[JsObject]] = getArray(name, { case obj: JsObject => obj })
private def getNumber[T](name: String, parse: String => T): Option[T] = {
getString(name).flatMap(value =>
try Some(parse(value))
catch {
case _: NumberFormatException => None
})
}
private def getArray[T](name: String, extract: PartialFunction[JsValue, T]): Option[Seq[T]] = {
getString(name).flatMap { value =>
try JsonParser(value) match {
case JsArray(elements) =>
Some(elements.map { element =>
extract.applyOrElse(
element,
(_: JsValue) => {
// We're catching and ignoring this exception anyway, so just use it.
throw new JsonParser.ParsingException("")
})
})
case _ => None
} catch {
case _: JsonParser.ParsingException => None
}
}
}
}
